JP6978742B2 - Hot water storage type electric water heater operation system for each block by transmitting control information - Google Patents

Description

The present invention relates to a centralized operation system for a large number of hot water storage type electric water heaters existing in a predetermined area.

Since electricity is generated and consumed at the same time and cannot be stored basically, electric power companies are required to constantly match the ever-changing demand power (power consumption) with the supplied power. .. That is, the balance between supply and demand of this electric power cannot be maintained. For example, when the supplied electric power is insufficient with respect to the required electric power, the frequency of the electric power system decreases, and conversely, when the supplied electric power becomes excessive with respect to the required electric power, the electric power system This is because there is a concern that the frequency and the like will rise, and in any of these cases, the equipment that uses electricity will be adversely affected and the power system will become unstable.

By the way, in recent years, the photovoltaic power generation system has become remarkably widespread, and the risk of destabilization of the power system is increasing due to the sale of power of this photovoltaic power generation system.

For example, in a solar power generation system in a general household, the power generated by the solar panel is connected to a commercial power system, and when the generated power exceeds the power consumption in the home, this surplus power is used as a commercial power source. On the other hand, when the generated power falls below the required power due to rainy weather or the like, the power of the commercial power system is used to make up for the shortage of power.

In addition, in large-scale power generation equipment (so-called mega solar system), which has been expanding rapidly in recent years, for example, a large number of solar panels are installed in mountainous areas, and almost all of the large power generated here is used as it is in the commercial power supply system. It is designed to flow to.

The peak of the power generated by photovoltaic power generation varies depending on the season (that is, depending on the sunshine time or the altitude of the sun), but it generally appears in the time zone from 11:00 to 13:00, and 4 of the daily power generation amount in that time zone. It is known that about a percentage is concentrated. During this time period, most of the generated power of photovoltaic power generation flows into the power system as surplus power, and as a result, there is a concern that the power system may become unstable.

In view of such circumstances, Patent Document 1 describes that the amount of daytime electric power generated by solar power generation is consumed by boiling hot water in a hot water storage type electric water heater as a power consuming device and filling the hot water storage tank with hot water. A technique has been proposed in which the generation of surplus power in the middle time zone is suppressed to reduce the amount of output power to the power system, thereby suppressing the destabilization of the power system.

Japanese Unexamined Patent Publication No. 2015-106937

However, since the technology shown in Patent Document 1 targets a facility equipped with both a solar power generation device and a hot water storage type electric water heater, the solar power generation capacity and the electric capacity of the hot water storage type electric water heater are increased. If it is not balanced, it will not be effective enough.

In addition, since the output power to the power system is reduced by consuming the surplus power in a single facility, the effect must be limited. If the effect is to be centrally managed and operated in a wide area to obtain a higher effect in a stable manner, the output suppression information of the photovoltaic power generation device is obtained for each of the above facilities, and the hot water storage type electric hot water supply is obtained. It is necessary to control the energization of the vessel, which requires expensive additional equipment and construction, and is not feasible in terms of cost.

Therefore, the present invention has a simple and inexpensive configuration in which the surplus power generated by photovoltaic power generation is absorbed by a large number of hot water storage type electric water heaters in the area, thereby reducing the burden on the power transmission and distribution system and improving its stability. It was made for the purpose of proposing a hot water storage type electric water heater operation system that was made to be obtained.

In the present invention, the following configuration is adopted as a specific means for solving such a problem.

In the first invention of the present application, while a large number of solar panels are installed in a solar power generation area of a predetermined size, an energization control device is provided in each control area set in the vicinity of the solar power generation area. A large number of hot water storage type electric water heaters are installed, the control area is divided into a plurality of control blocks, and an energization control information transmission device is installed in the appropriate place, the day after the above solar power generation area. Based on the weather and the installation status of the solar panel in the above solar power generation area, the amount of solar power generation in the entire solar power generation area on the next day and the amount of power consumption due to the variable load are predicted, and the predicted amount of the above solar power generation is used. The surplus power generation amount is obtained from the difference from the predicted amount of power consumption due to the variable load, and the surplus power generation amount is obtained for each of the control blocks so that the surplus power generation amount can be consumed by energization during the daytime hours of each of the hot water storage type electric water heaters. The energization control information generator for generating information on the daytime energization start time for the hot water storage type electric water heater is provided, and the energization control information transmission device receives the energization control information from the energization control information generator and uses each of the above. While transmitting all at once to each energization control device of the control block, in the energization control device provided in each of the hot water storage type electric water heaters, when the control information from the energization control information transmission device is received, the control information is transmitted. It is characterized in that it is configured to start the energization of each of the above-mentioned hot water storage type electric water heaters at the daytime energization start time specified in 1 and to prevent the nighttime energization of the hot water storage type electric water heaters.

Here, it is said that the control area is set in the vicinity of the above-mentioned photovoltaic power generation area, but this "neighborhood" indicates the relative positional relationship between the photovoltaic power generation area and the control area, and the photovoltaic power generation area is shown. The positional relationship where the power generation area and the control area all overlap as the same area, the positional relationship where the control area is included in the photovoltaic power generation area, the positional relationship where the photovoltaic power generation area and the control area partially overlap, and the photovoltaic power generation area. It is a concept showing the positional relationship in which the control areas are adjacent to each other, the positional relationship in which the photovoltaic power generation area and the control area are separated from each other at a short distance to the extent that transmission loss between them hardly occurs.

In the second invention of the present application, in the hot water storage type electric water heater operation system according to the first invention, the solar power generation area and the control area are set as the same area, or the solar power generation area The feature is that the control area is set inside.

In the third invention of the present application, in the hot water storage type electric water heater operation system according to the first or second invention, the solar power generation area and the control area are set as the power supply area of one ultra-high pressure substation. It is characterized in that the surplus power generation amount generated in the power supply area is configured to be consumed in the hot water storage type electric water heater in the power supply area.

In the fourth invention of the present application, in the hot water storage type electric water heater operation system according to the first, second or third invention, the energization control information generation device and the energization control information transmission device are operated from the daytime time zone. It is characterized in that it is configured to execute a predetermined control until the start point of the night time zone and complete the transmission of the above control information.

In the fifth invention of the present application, in the hot water storage type electric water heater operation system according to the first, second, third or fourth invention, the range of the control block is defined by latitude and longitude, and the energization control information is described. It is characterized by being included in the control information transmitted from the transmission device.

In the sixth invention of the present application, in the hot water storage type electric water heater operation system according to the first or second invention, when the surplus power generation amount is equal to or less than the reference power generation amount, the control information is not transmitted. The hot water storage type electric water heater is characterized in that it is operated by energization at night.

The present invention has the following effects.

(A) First invention of the present application (a-1) According to the hot water storage type electric water heater operation system according to the first invention of the present application, the predicted amount of solar power generation and the power consumption of the variable load on the next day Based on this, the surplus power generation amount for the next day is calculated, and this surplus power generation amount is consumed by energizing the hot water storage type electric water heater in the control area during the daytime, so that the inflow power to the power transmission and distribution system is reduced as much as possible. The stability of the power transmission and distribution system is guaranteed.

(A-2) The control is provided by a simple and inexpensive configuration in which at least one energization control information transmitting device is arranged in the control area and an energization control device is provided in each hot water storage type electric water heater in the control area. Each hot water storage type electric water heater in the area can be centrally managed and operated. For example, when the system shown in Patent Document 1 is to be applied to centralized management and operation in a wide control area. Since it does not require expensive additional equipment and construction as in the above, it is possible to provide an extremely useful and highly feasible hot water storage type electric water heater operation system as a means for preventing destabilization of the electric power system.

(A-3) The amount of power generated by the solar panel depends most on the weather, and the amount of power generated is large on sunny days and low on bad weather. Even if the weather is the same for the day, the amount of power generated by the solar panel will differ depending on the length of the sunshine hours due to the difference in the installation location. That is, there is a difference in the amount of power generation per day because the effective sunshine hours for power generation differ between the solar panel installed in a sunny place and the solar panel installed in a place where the sunlight is not so good. Occurs. Furthermore, even within a day, for example, in a sunny time zone (that is, a time zone in which the sun altitude is high), the amount of power generation is large, and in a time zone that is not sunny (that is, a time zone in which the sun altitude is low). Then, the amount of power generation changes depending on the time of day, such as the amount of power generation decreases. Among the factors governing the amount of power generated by these solar panels, factors other than the weather can be grasped based on the installation status (particularly the installation location) of the solar panels.

Therefore, in the present invention, the amount of photovoltaic power generation in the entire photovoltaic power generation area on the next day is taken into consideration in consideration of both the weather on the next day of the photovoltaic power generation area and the installation status of the solar panel in the photovoltaic power generation area. Therefore, the reliability of the predicted value of this photovoltaic power generation amount is high, and by extension, the surplus power generation amount of the next day calculated using the predicted value of this photovoltaic power generation amount is more accurate. You can know.

(A-4) In the present invention, the power consumption due to the fluctuating load corresponding to the weather forecast is predicted, and the difference between the predicted power consumption due to the fluctuating load and the predicted amount of photovoltaic power generation is used. Since the amount of surplus power generation is calculated and the predicted amount of photovoltaic power generation is highly reliable as described above, the amount of surplus power generation required here is also highly reliable. The surplus power generation amount required here is not only the total surplus power generation amount in the entire solar power generation area, but also the regional and temporal surplus power generation amount corresponding to the installation situation of the solar panel. As a result, the control order of each control block when the surplus power generation amount is consumed by energization in the daytime time zone of each hot water storage type electric water heater, or each control block. By setting the energization time in the daytime time zone more finely and appropriately for many electric water heaters belonging to the above, and reducing the amount of surplus power generation, so to speak, "local production and local consumption" of electric power is realized, and the power system is unsuccessful. The effect of suppressing stabilization is further improved.

(B) In the hot water storage type electric water heater operation system according to the second invention of the present application, in the hot water storage type electric water heater operation system according to the first invention, the relative positional relationship between the photovoltaic power generation area and the control area is determined. , The solar power generation area and the control area are set as the same area, or the control area is set inside the solar power generation area. In other words, among the concepts of the relative positional relationship between the photovoltaic power generation area and the control area in the first invention, "the positional relationship in which the photovoltaic power generation area and the control area all overlap as the same area" or "solar energy". It is specified as one of the "positional relationships in which the control area is included in the power generation area". Therefore, even in this second invention, the effect described in the above (a) is basically obtained.

(C) According to the hot water storage type electric water heater operation system according to the third invention of the present application, the following peculiar effects can be obtained in addition to the effects described in the above (a) or (b). That is, in the present invention, the solar power generation area and the control area are set in the power supply area of one ultra-high pressure substation, and the surplus power generation amount generated in the power supply area is the hot water storage type in the power supply area. Since it is configured so that it can be consumed by an electric water heater, it is possible to avoid power transportation loss while providing certain economies of scale within the power supply area of the above-mentioned ultra-high pressure substation, so to speak, "local production and local consumption" of power. It will be realized.

(D) According to the hot water storage type electric water heater operation system according to the fourth invention of the present application, in addition to the effects described in the above (a), (b) or (c), the following peculiar effects are obtained. can get. That is, in the present invention, the energization control information generation device and the energization control information transmission device perform predetermined control between the daytime time zone and the start point of the nighttime time zone to complete the transmission of the control information. Because it is configured as such, it is reliable to energize each hot water storage type electric water heater of each control block during the daytime of the next day and to prevent energization of the hot water storage type electric water heater during the nighttime of the previous night. As a result, the effective use of surplus electricity is promoted.

(E) According to the hot water storage type electric water heater operation system according to the fifth invention of the present application, in addition to the effects described in the above (a), (b), (c) or (d), the following effects are obtained. A unique effect can be obtained. That is, in the present invention, since the control block is designated by latitude and longitude and included in the control information transmitted from the energization control information transmitting device, the range of the control block can be easily set. Efficient control of a large number of hot water storage type electric water heaters is possible.

(F) According to the hot water storage type electric water heater operation system according to the sixth invention of the present application, the following peculiar effects can be obtained in addition to the effects described in the above (a) or (b). That is, in the present invention, when the surplus power generation amount is equal to or less than the reference power generation amount, the control information is not transmitted and the hot water storage type electric water heater is operated by energization at night. Even when the amount of solar power generation is small, the required amount of hot water supplied by the above-mentioned hot water storage type electric water heater can be covered, and the reliability of the hot water supply system is ensured.

It is explanatory drawing of the solar power generation area, the control area and the control block of the hot water storage type electric water heater operation system of this invention. It is a functional block diagram which shows the system structure of the hot water storage type electric water heater operation system which concerns on embodiment of this invention. It is a control flowchart in the energization control information transmission device. It is a control flowchart on the side of a hot water storage type electric water heater.

A: Photovoltaic power generation area, control area and control block In FIG. 1, a photovoltaic power generation area 6 and the photovoltaic power generation are widely set as areas related to the operation of the hot water storage type electric water heater operation system according to the present invention. The control area 5 set inside the area 6 is shown. In this embodiment, the relative positional relationship between the photovoltaic power generation area 6 and the control area 5 is such that the control area 5 is set inside the photovoltaic power generation area 6, that is, the photovoltaic power generation area 6 In another embodiment, for example, the photovoltaic power generation area 6 and the control area 5 overlap as the same area, and the photovoltaic power generation area 6 and the control are controlled. It is possible to adopt one in which the areas 5 partially overlap, one in which the photovoltaic power generation area 6 and the control area 5 are adjacent to each other, or one in which the photovoltaic power generation area 6 and the control area 5 are separated from each other at a short distance.

The above-mentioned photovoltaic power generation area 6 is an area for arranging a solar panel 4, which is one of the operation targets by the hot water storage type electric water heater operation system of the present invention, and here is each photovoltaic power generation device. Panels and solar panels for small-scale solar power generation equipment for home use are arranged. The solar panels 4 are not evenly arranged in the photovoltaic power generation area 6, but each solar panel in the large-scale photovoltaic power generation device is installed in the suburbs where the arrangement space is relatively large. On the contrary, solar panels in small-scale photovoltaic power generation equipment are often installed in densely populated residential areas.

The control area 5 is an area set in the vicinity of the solar power generation area 6, and a large number of hot water storage type electric water heaters 2 equipped with an energization control device 3 are installed therein. The arrangement of the electric water heaters 2 in the control area 5 generally corresponds to the population density, and the number of arrangements tends to increase as the population density increases.

The settings of the photovoltaic power generation area 6 and the control area 5 are optional, but in this embodiment, radio waves reach from the energization control information transmitting device 1 arranged in the center of the control area 5 as described later. In consideration of the distance, the control area 5 is set as a circular area, and the photovoltaic power generation area 6 is concentrically set outside the control area 5.

Further, the arrangement information of the solar panel 4 in the photovoltaic power generation area 6 and the arrangement information of the electric water heater 2 in the control area 5 are the energization control information generation device installed separately from the energization control information transmission device 1. It is centrally managed in 10 (see FIG. 2).

Further, the control area 5 is divided into nine areas according to latitude and longitude in order to easily and appropriately manage and operate the electric water heater 2 installed here, and each of these divided areas is the first. The control blocks BL-1 to 9th control blocks BL-9 are used, and the actual energization control for the hot water storage type electric water heater 2 is performed in each of these control blocks BL-1 to BL-9. The setting of the control block is arbitrary as long as it is specified by the latitude and longitude, and for example, the number of blocks, the division area, and the like can be freely set as needed. Further, the position information based on the latitude and longitude of each control block is also centrally managed by the energization control information generation device 10.

The hot water storage type electric water heater 2 arranged in the control area 5 is required by boiling hot water with an electrically driven heat pump or heater to store hot water in a hot water storage tank having a capacity of about 200 to 1000 L. According to this, it is a water heater with a structure that supplies hot water from the hot water storage tank. In the hot water storage type electric water heater 2, the power generation control by the remote control operation of the installer (customer) is given the highest priority, and if the operation is not performed, the nighttime is based on the preset control program. It is set to store hot water by electricity of a commercial power source sold at a low price (for example, from 23:00 to 7:00 the next morning), but in this embodiment, as will be described later, the energization control information transmission device 1 It is set to store hot water by energizing the surplus power generation during the day by receiving the information transmitted wirelessly from.

On the other hand, in this embodiment, as described above, a large number of solar panels 4 are installed in the photovoltaic power generation area 6, and in the control area 5 set inside the photovoltaic power generation area 6. A large number of electric water heaters 2 are installed, but between the installation status of each solar panel 4 and the installation status of the electric water heater 2, the solar panel 4 and the electric water heater 2 are installed as a set. Except for small-scale power generation equipment, which is often used, there is basically no correspondence.

For these reasons, in the energization control information generator 10 described later, when setting the daytime energization start time of the hot water storage type electric water heater 2 in each control block BL-1 to BL-9, all the control blocks BL In order to achieve an efficient hot water storage effect in -1 to BL-9, that is, effective consumption of solar power generation amount, the order of starting energization of each control block BL-1 to BL-9 is set. I have to.

B: Functional block diagram FIG. 2 shows a functional block diagram showing a system configuration of a hot water storage type electric water heater operation system according to an embodiment of the present invention. In this operation system, the energization control information transmission device 1 installed in the control area 5 and the energization control installed separately from the energization control information transmission device 1 and connected to the energization control information transmission device 1 by a communication line are provided. It is composed of an information generation device 10 and an energization control device 3 provided in each of the hot water storage type electric water heaters 2.

B-1: Energization control information generator 10
The energization control information generator 10 centrally manages the installation status 12 of the solar panel 4, the installation status 13 of the electric water heater 2, and the position information 14 of the control blocks BL-1 to BL-9, and the next day's weather forecast. The expected variable load electric energy 15 and the expected photovoltaic power generation amount 16 based on the expected variable load electric energy 15 and the expected surplus photovoltaic power generation amount 17 based on the expected variable load electric energy 15 and the expected photovoltaic power generation amount 16 are also centrally managed. Based on each of these information, the daytime energization start time information 18 of each of the control blocks BL-1 to BL-9 is calculated and possessed. Then, the daytime energization start time information 18 is output to the energization control information transmission device 1 installed in the control area 5 through the communication line.

The expected variable load electric energy 15 is a load that fluctuates in relation to the weather of the next day after obtaining information on the weather forecast of the next day, for example, a heating / cooling load, a lighting load associated with the use of lighting in the morning and evening, and a bath requirement. It is an expected value such as a hot water temperature load due to an increase in hot water temperature. Further, the estimated solar power generation amount 16 is a prediction of the next day's power generation amount by all the solar panels 4 in the solar power generation area 6 based on the information on the weather of the next day and the installation information of the solar panel 4. The value. Further, the expected surplus power generation amount 17 is acquired as the difference between the expected solar power generation amount and the expected variable load power amount.

Further, the daytime energization start time information 18 is used when the electric power (surplus power generation amount) obtained by solar power generation is consumed by the daytime energization of the hot water storage type electric water heater 2 under the weather conditions of the next day. At what time is it optimal to start daytime energization of the control blocks BL-1 to BL-9 to the hot water storage type electric water heater 2 (in other words, in what order is it optimal to start energization)? It is set from the viewpoint.

For example, if the next day is forecast to be sunny, it is predicted that the amount of solar power generation will increase and the amount of surplus power generation will increase. It may be set to energize during the daytime, but if it is forecast that the next day will be cloudy, only a few blocks of the above control blocks BL-1 to BL-9 will be energized for each block from morning to afternoon. The start time may be staggered and the power may be set to be energized during the day. Further, if the next day is a forecast of heavy rain or snowfall, it is predicted that no surplus power generation will occur. Therefore, all of the control blocks BL-1 to BL-9 may be set not to be energized during the day.

The energization control information transmitter 1 uses the daytime energization start time information 18 obtained by the energization control information generator 10 to control the energization of the hot water storage type electric water heaters 2 of the control blocks BL-1 to BL-9. The device 3 can be wirelessly transmitted all at once, and an LPWA transmitter can be used as the energization control information transmitting device 1. By using this LPWA transmitter, one energization control information transmitter 1 can transmit once to a large number of hot water storage type electric water heaters 2 in each of the control blocks BL-1 to BL-9 by broadcasting type wireless transmission. Control information can be transmitted all at once to a centralized control command system by designating each of the control blocks BL-1 to BL-9, targeting a large number of hot water storage type electric water heaters 2 in a specific control block. It is possible to efficiently transmit and control control information.

It should be noted that the transmission of the control information from the energization control information transmission device 1 can be performed so that all necessary information can be transmitted at one time, and for example, a plurality of information for each control block BL-1 to BL-9 can be transmitted. You may send it once.

For example, among the above control information, for the control block that is energized during the daytime on the next day, it is necessary to complete the transmission of at least the information that the daytime energization is performed on the next day by the start point of the night time zone. Otherwise, the hot water storage type electric water heater 2 in the control block will be energized at night and cannot be energized during the daytime the next day. However, the trigger information for starting the daytime energization may be transmitted for each control block BL-1 to BL-9 by the start time of the daytime energization on the next day.

If all the transmission of the above control information is completed between the daytime time zone and the start point of the nighttime time zone, the hot water storage type electric water heater of each control block in the daytime time zone of the next day It is preferable to energize during the day and to prevent energization of the hot water storage type electric water heater during the night time of the previous night because both are systematically and surely executed.

B-2: Energization control device 3
The energization control device 3 is arranged in each of the hot water storage type electric water heaters 2, and controls daytime energization of the hot water storage type electric water heater 2 by receiving control information from the energization control information transmission device 1. ..

The control information transmitted from the energization control information transmission device 1 collectively transmits information regarding the daytime energization start time of each of the control blocks BL-1 to BL-9 as one information signal. There, information about the control block to which the self belongs and information about other control blocks are mixed here.

Therefore, in each energization control device 3 of each of the control blocks BL-1 to BL-9, only the control information related to the control block to which the self belongs is extracted from the control information input from the energization control information transmission device 1. , The daytime energization of the hot water storage type electric water heater 2 is executed at the energization start time indicated in the control information.

C: Actual control contents Here, with reference to FIGS. 3 and 4, the contents of control in the energization control generation device 10 and the energization control device 3 will be specifically described.

C-1: Control on the energization control information generator 10 side (see FIG. 3)
In the control on the energization control information generation device 10 side, as shown in FIG. 3, it is first determined whether or not the measurement time has been reached after the control is started (step S1). This measurement time is the time between the daytime time zone and the start point of the nighttime time zone, that is, the time from the start time of the daytime energization of the day to the start of the nighttime energization, and is the starting point of the control of the next day. It is an arbitrary time between 8:00 and 23:00, for example.

If it is determined in step S1 that the measurement time has been reached, then in step S2, the expected variable load power and the expected amount of solar power generation are read out from the self-accumulated information, and the surplus due to solar power generation is read based on this. Acquire the amount of power generation (step S3).

Next, this surplus power generation amount is compared with a predetermined reference power generation amount (step S4). Then, when the surplus power generation amount is larger than the standard power generation amount, it is determined that it is necessary to consume this surplus power generation amount in the hot water storage type electric water heater 2 of each control block BL-1 to BL-9, and each control block. The daytime energization start time for each of the hot water storage type electric water heaters 2 of BL-1 to BL-9 is set (step S5).

Next, the set daytime energization start time is output as energization control information to the energization control device 3 of all the hot water storage type electric water heaters 2 in each control area 5 (step S6). The above is the control on the energization control information generation device 10 side.

C-2: Control on the hot water storage type electric water heater 2 side (see Fig. 4)
In the control of the hot water storage type electric water heater 2, the remote control operation by the installer (that is, the customer) of the hot water storage type electric water heater 2 is given the highest priority, and the nighttime energization control by the commercial power source is performed only when there is no customer operation. And the daytime energization control is executed by the surplus power of the solar power generation.

First, in step S21, it is determined whether or not the customer has been operated. Here, if it is determined that the customer operation has not been performed, the control proceeds to step S25 or lower as it is, but if it is determined that the customer operation has been performed, the hot water storage type electric water heater 2 is commercialized in order to give priority to this. Electric power is supplied from the power supply system to execute the hot water storage operation (step S22), and this electric power supply is continued until the customer operation is completed (step S23).

Then, after the power supply to the hot water storage type electric water heater 2 based on the customer operation is stopped, the hot water storage margin amount in the hot water storage type electric water heater 2 is determined (step S24). Here, if the hot water storage margin is not sufficient (when it is difficult to consume the surplus electric power of the photovoltaic power generation in the hot water storage type electric water heater 2), the control is returned without shifting to the control in step S25 or lower. do. On the other hand, when it is determined that the hot water storage type electric water heater 2 has a sufficient hot water storage margin, the control proceeds to step S25 or less.

First, in step S25, it is determined whether or not the energization control information from the energization control information transmission device 1 has been received. Here, when it is determined that the energization control information has been input, it is further determined whether or not the energization control information includes the control block to which the self belongs (step S26), and the control block to which the self belongs is included. If this is the case, an operation is performed to prevent the destabilization of the power system.

That is, if the hot water storage type electric water heater 2 is energized at night by a commercial power source and the hot water storage tank is filled with hot water at night before the start of daytime energization on the next day, the daytime energization on the next day is performed. Since it becomes impossible to store hot water due to the above, this nighttime energization is blocked, and at the designated daytime energization start time, the surplus electric power of solar power generation is started to be energized to the hot water storage type electric water heater 2, and the surplus power generation amount is calculated as described above. It is consumed by the operating load of the hot water storage of the hot water storage type electric water heater 2, thereby preventing the destabilization of the electric power system (step S27). The daytime energization of the hot water storage type electric water heater 2 is continued until the daytime energization stop time, and the control is returned when the time elapses (step S28).

On the other hand, in step S25, when it is determined that the energization control information has not been received yet, and in step S25, it is determined that the energization control information has been received, but in the following step S26, this energization control information is used. If it is determined that the control block to which the self belongs is not included, both shift to the nighttime energization control side in step S29 or lower. That is, in step S29, it is determined whether or not the nighttime energization time has come, and when the nighttime energization start time is reached, energization of the commercial power supply to the hot water storage type electric water heater 2 is started (step S30), and the commercial power supply is started. The hot water storage type electric water heater 2 is cooked by the power source, and the power supply to the hot water storage type electric water heater 2 is stopped at the nighttime energization end time (step S31). This completes the control on the energization control device 3 side.

The hot water storage type electric water heater operation system according to the present invention is used in the field of power transmission and distribution in which photovoltaic power generation is connected to a commercial power supply system.

1 ・ ・ Energization control information transmitter 2 ・ ・ Hot water storage type electric water heater 3 ・ ・ Energization control device 4 ・ ・ Solar panel 5 ・ ・ Control area 6 ・ ・ Solar power generation area 10 ・ ・ Energization control information generator 12 ・・ Solar panel installation information 13 ・ ・ Hot water storage type electric water heater installation information 14 ・ ・ Control block position information 15 ・ ・ Expected variable load power amount 16 ・ ・ Expected solar power generation amount 17 ・ ・ Expected surplus power generation amount 18 ・ ・ Day Medium power start time information BL-1 to BL-9 ... Control block

Claims (6)

While a large number of solar panels are installed in a photovoltaic power generation area of a predetermined size, a large number of hot water storage type electric hot water supply devices each equipped with an energization control device are installed in the control area set near the photovoltaic power generation area. In the case where the device is installed, the control area is divided into a plurality of control blocks, and the energization control information transmission device is installed at the appropriate place.
Based on the weather on the next day of the photovoltaic power generation area and the installation status of the photovoltaic panels in the photovoltaic power generation area, the photovoltaic power generation amount of the entire photovoltaic power generation area on the next day and the power consumption due to the variable load are predicted, and the above The surplus power generation amount is obtained from the difference between the predicted amount of photovoltaic power generation and the predicted amount of power consumption due to the above-mentioned variable load, and the surplus power generation amount can be consumed by energizing each of the above-mentioned hot water storage type electric water heaters during the daytime. Each of the above control blocks is equipped with an energization control information generator that generates information on the daytime energization start time for each hot water storage type electric water heater.
The energization control information transmission device receives the energization control information from the energization control information generation device and simultaneously transmits the energization control information to each energization control device of each control block.
In the energization control device provided in each of the hot water storage type electric water heaters, when the control information from the energization control information transmission device is received, each of the hot water storages at the daytime energization start time indicated by the control information. A hot water storage type electric water heater operation system characterized in that it is configured to start energization of a hot water storage type electric water heater and block nighttime energization of the hot water storage type electric water heater. In claim 1,
A hot water storage type electric water heater operation system characterized in that the solar power generation area and the control area are set as the same area, or the control area is set inside the solar power generation area. In claim 1 or 2,
The solar power generation area and the control area are set in the power supply area of one ultra-high pressure substation, and the surplus power generation amount generated in the power supply area can be consumed by the hot water storage type electric water heater in the power supply area. A hot water storage type electric water heater operation system characterized by being configured in this way. In claims 1, 2 or 3,
The energization control information generation device and the energization control information transmission device are configured to execute predetermined control between the daytime time zone and the start point of the nighttime time zone to complete the transmission of the control information. A hot water storage type electric water heater operation system featuring. In claim 1, 2, 3 or 4,
The control block is a hot water storage type electric water heater operation system whose range is defined by latitude and longitude and is included in the control information transmitted from the energization control information transmission device. In claim 1 or 2,
When the surplus power generation amount is equal to or less than the standard power generation amount, the control information is not transmitted, and the hot water storage type electric water heater is operated by energization at night.

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