JP7689938B2 - Power generation system and power generation control method - Google Patents

Description

This disclosure relates to a power generation system and a power generation control method.

A private power generation system that supplies power to a load using multiple private power generation devices operating in parallel is disclosed in, for example, Patent Document 1.

Patent Document 1 discloses a power generation system using an autonomous distributed control method in which a plurality of power generation devices are connected to a load bus to which a load is connected, and a power generation device controller is provided corresponding to each power generation device and controls the corresponding power generation device. Each power generation device controller is aware of the rated capacity and current output power of the corresponding power generation device, and exchanges information with other power generation device controllers to collect information on the rated capacity and current output power of other power generation devices. Each power generation device controller calculates the load share of the corresponding power generation device within the range of the rated capacity from the collected information, and controls the corresponding power generation device according to the calculated load share.

JP 2011-193587 A

However, conventional power generation systems only control the load sharing of each power generation device according to the rated capacity ratio, and do not control the characteristics and state of each power generation device. For example, there is no detailed control such as load sharing control to reduce fuel consumption or reducing the load on old and deteriorated generators, and some power generation devices may be controlled to operate in an overloaded state. It is desirable to reduce fuel consumption to enable longer operation and reduce the load on old generators to extend their lifespan.

This disclosure has been made in consideration of the above circumstances, and aims to enable long-term operation of the power generation system and extend the life of the power generation system, making it less susceptible to breakdowns.

In order to achieve the above object, the power generation system of the present disclosure includes a plurality of power generation devices that generate electricity and power generation device controllers that control the power generation devices, and the power generation device controllers of the plurality of power generation devices are connected to each other via communication lines so that they can communicate with each other. The power generation device controller sets the power generation device it controls to one of the following operation modes: a FULL operation mode in which the load is shared within the rated capacity range, a HALF operation mode in which the load is shared within half the rated capacity range, an ECO operation mode in which the load is shared according to the fuel consumption efficiency, and a NOLOAD operation mode in which the load is not shared. The power generation device controller collects information on the output states and operation modes of the other power generation device controllers and other power generation devices, and controls the output state of the power generation device.

According to the present disclosure, by controlling each power generation device while taking into account the characteristics of each power generation device, it is possible to operate the power generation system for a long time, and also to extend the life of the power generation system, making it less likely to break down.

FIG. 1 is a diagram showing an example of a system configuration of a private power generation system according to a first embodiment of the present disclosure. FIG. 1 is a diagram showing an example of an internal function of a private power generation device controller according to a first embodiment of the present disclosure. FIG. 1 is a diagram showing a hardware configuration of a private power generation device controller according to a first embodiment of the present disclosure. FIG. 1 is a diagram showing an example of a communication method for transmitting and receiving information between the individual private power generation device controllers according to the first embodiment of the present disclosure. FIG. 1 is a diagram showing an example of an operation flow of each private power generation device controller according to the first embodiment of the present disclosure. 1A is a flowchart showing details of the processing operation of step S101 for the private power generating device controller No. 1; FIG. 1B is a flowchart showing details of the processing operation of the private power generating device controller No. 2; FIG. 1C is a flowchart showing details of the processing operation of the private power generating device controller No. 3; and FIG. 1D is a flowchart showing details of the processing operation of the private power generating device controller No. 4. FIG. 2A is a diagram showing the load-shared output power for each private power generating device, and FIG. 2B is a diagram showing the load-shared output power when the load increases.

Below, an embodiment of the power generation system of the present disclosure will be described in detail with reference to the drawings.

(First embodiment)
1, the private power generation system 1 includes a load bus BL to which various loads L are connected, a plurality of private power generation apparatuses No. 1, No. 2, ..., No. n (G1, G2, ..., Gn) each connected to the load bus BL via a generator main circuit Mc1 and a generator circuit breaker CBg, and private power generation apparatus controllers No. 1, No. 2, ..., No. n that are provided individually corresponding to each of the private power generation apparatuses G1, G2, ..., Gn and that input output state information, which is the current output power of the corresponding private power generation apparatus to be monitored and controlled, as a power detector through a current detector made of an instrument current transformer CT and a voltage detector made of an instrument voltage transformer VT, and output various control commands Ci1, Ci2, ..., Cin to the private power generation apparatuses to be monitored and controlled. n (Crl1, Crl2, ... Crln) and a communication line CL which is a transmission medium for transmitting and receiving status information of the corresponding private power generating apparatus to be monitored and controlled by each of the private power generating apparatus controllers Crl1, Crl1, ... Crln between the private power generating apparatus controllers Crl1, Crl2, ... Crln. Note that, for the sake of simplicity of explanation, only two private power generating apparatuses and private power generating apparatus controllers are shown, and the private power generating apparatuses ... No. n (Gn) and the private power generating apparatus controllers ... Crln are omitted from the illustration.

The private power generation device controllers Crl1, Crl2, ... Crln are the same product, and all have the same configuration and the same functions. As shown in FIG. 2, each has the following functional parts: a start/stop control part Crla, a synchronization control part Crlb, a private power generator control mode setting part Crlc, a private power generator load sharing calculation control part Crld, a private power generator output quantity input/output part Crle, a part for inputting output status information of other power generators Crlf, a part for storing ratings of each power generator Crlg, a part for storing the private power generator operation mode Crlh, and a part for storing the operation mode of each power generator Crli.

The start/stop control unit Crla is a functional unit that controls the start and stop of the corresponding private power generation equipment. The synchronization control unit Crlb is a functional unit that controls the synchronization when the corresponding private power generation equipment is connected in parallel.

The generator control mode setting unit Crlc is a functional unit that sets the load sharing control mode in which the corresponding private generating equipment is controlled automatically, or the manual mode in which the corresponding private generating equipment is controlled manually. The load sharing control mode is a mode in which the load sharing amount of the corresponding private generating equipment is calculated from information collected from other private generating equipment controllers, and the corresponding generating equipment is controlled according to the calculated load sharing amount. There are four load sharing control modes: FULL operation mode, HALF operation mode, ECO operation mode, and NOLOAD operation mode. The manual mode is a mode in which the load sharing automatic control is not performed, and the operator adjusts the load to a specified level using a load increase/decrease switch provided on the control panel.

The private generator load sharing calculation control unit Crld is a functional unit that calculates the load sharing amount of each private generating device during steady operation, including the current output state information of its own corresponding private generating device, based on the current output state information, operating mode information, fault information, and maintenance information of the corresponding private generating devices obtained from all other private generating device controllers, and calculates the target control amount (the difference between the shared load amount of its own corresponding private generating device and the current power generation amount) for controlling the corresponding private generating device so that it generates power equivalent to its shared load amount.

The private generator output quantity input/output unit Crle is a functional unit that inputs information on the output voltage and output current of the corresponding private generating equipment from the outputs of current detectors and voltage detectors such as the current transformer CT and voltage transformer VT connected to the generator main circuit Mc1 of the corresponding private generating equipment.

The other generator output status information input unit Crlf is a functional unit that inputs the current output status information, operating mode information, fault information, maintenance information, etc. of the corresponding private power generation equipment from all other private power generation equipment controllers via the communication line CL.

Each generator rating storage unit Crlg is a functional unit that stores the generator rated output values of its own corresponding private generating equipment and all other private generating equipment, i.e., all private generating equipment of the private generating system 1, in advance of load sharing control. The generator rated output values of all private generating equipment may be input in advance, but it is more flexible and accurate to respond to changes in the system scale if each private generating equipment controller collects the generator rated output values of each corresponding private generating equipment from all other private generating equipment controllers, and the collected information may be input together with the current output status information, operating mode information, failure information, maintenance information, etc. of the private generating equipment, or may be input separately from the information.

The generator operation mode setting unit Crlh is a functional unit that sets the operation mode of the corresponding private power generating device. There are four operation modes: the above-mentioned FULL operation mode, HALF operation mode, ECO operation mode, and NOLOAD operation mode. The output of a power generating device set in the FULL operation mode is controlled so that the amount of power does not exceed the rated capacity. The output of a power generating device set in the HALF operation mode is controlled so that the amount of power does not exceed half the rated capacity. The output of a power generating device set in the ECO operation mode is controlled so that the amount of output power relative to the amount of fuel consumed is the highest, that is, the power with the highest power generation efficiency. The most efficient output power needs to be set in advance. The power generating device set in the NOLOAD operation mode is controlled so that the load transmission is not performed as much as possible.

Each generator operation mode storage unit Crli is a functional unit that stores the operation modes of its own corresponding private power generating device and all other private power generating devices, i.e., all private power generating devices in the private power generating system, in advance of load sharing control. Note that the operation modes of all private power generating devices may be input in advance, but it is more flexible and accurate to respond to changes in operation mode if each private power generating device controller collects the operation modes of each corresponding private power generating device from all other private power generating device controllers, and the collected information may be input together with the current output status information, failure information, maintenance information, etc. of the private power generating devices, or may be input separately from the information.

Figure 3 is a block diagram showing the hardware configuration of the private power generation device controller Crl, which is configured with a memory unit 10 composed of a non-volatile storage medium that stores a control program that defines the procedures for the private power generation load sharing calculation control, start/stop control, and synchronization control, a RAM (Random Access Memory) 11 as a main memory composed of a volatile storage medium, a communication I/F (Interface) 12 that communicates with other private power generation device controllers Crl, and a CPU (Central Processing Unit) 13 that executes the control program, all connected by a bus 14. The memory unit 10 also stores the generator control mode, rated power, operation mode, etc.

Figure 4 shows an example of a schematic diagram of information exchange between four private power generation device controllers Crl1, Crl2, Crl3, and Crl4. As shown in FIG. 4, each private power generation device controller Crl1, Crl2, Crl3, and Crl4 transmits information on the current output state and operation mode information of its own device (its corresponding private power generation device) to the other private power generation device controllers via the communication line CL, and each private power generation device controller Crl1, Crl2, Crl3, and Crl4 receives information on the current output state, operation mode information, and rated output value of all connected private power generation devices. In this way, the information exchanged between each private power generation device controller Crl1, Crl2, Crl3, and Crl4 is only the output state signal, operation mode information, and rated output value of the private power generation device, and control system signals and control system data such as control target values and control command values are not exchanged by communication.

Next, the load sharing process of each of the private power generation device controllers No. 1, No. 2, ... No. n (Crl1, Crl2, ... Crln) in the load sharing control mode, which automatically controls the private power generation device, will be explained with reference to Figure 5.

In FIG. 5, when the load sharing process is started, the private power generating device controller Crl of the private power generating device transmits the status information of the own device (current load sharing amount (generator output)) and operation mode information to all other private power generating device controllers Crl, and further receives the status information and operation mode information of all other private power generating devices from all other private power generating device controllers Crl (step S101).

Next, the private power generating device controller Crl checks the set rated power of the own unit (private power generating device No. n) (step S102). Next, the preset output power amount in the ECO operation mode in which the system operates at the output power with the lowest fuel consumption rate is read from the memory unit 10, and the ECO mode coefficient α for the rated power is calculated (step S103). Next, the private power generating device controller Crl judges whether the private power generating system 1 can output the power required for the load amount of the load L in the load sharing control mode, that is, whether the load sharing control mode is established (step S104). The judgment of whether the load sharing control mode is established is judged by whether the total load sharing capacity according to the operation mode of each private power generating device G exceeds the load amount of the load L. If the total load sharing capacity according to the operation mode of each private power generating device is within the range of the load amount of the load L, it is judged that the load sharing control mode is established (step S104: Yes), and then the operation mode of the own unit is confirmed (step S105). Conversely, if the sum of the load sharing capacities according to the operation modes of each private power generating device exceeds the load amount of the load L, it is determined that the load sharing control mode is not established (step S104: No), and the operation mode of the own unit is forcibly set to the FULL operation mode, which controls the output within a range that does not exceed the power amount of the rated capacity (step S106), and then the operation mode of the own unit is confirmed (step S105).

In step S105, the private power generating unit controller Crl checks whether the operation mode of the own unit is the FULL operation mode. If the operation mode of the own unit is the FULL operation mode (step S105: Yes), the upper limit of the power generation target power is set to the rated power (step S107). If the operation mode of the own unit is not the FULL operation mode (step S105: No), the private power generating unit controller Crl checks whether the operation mode of the own unit is the HALF operation mode (step S108). If the operation mode of the own unit is the HALF operation mode (step S108: Yes), the upper limit of the power generation target power is set to 1/2 of the rated power (step S109). If the operation mode of the own unit is not the HALF operation mode (step S108: No), the private power generating unit controller Crl checks whether the operation mode of the own unit is the NOLOAD operation mode (step S110). If the operation mode of the own unit is the NOLOAD operation mode (step S110: Yes), the power generation target power is set to 0, and control is performed to transmit as little power as possible to the load (step S111). If the operation mode of the own unit is not the NOLOAD operation mode (step S110: No), the private power generation device controller Crl checks whether the operation mode of the own unit is the ECO operation mode (step S112). If the operation mode of the own unit is the ECO operation mode (step S112: Yes), the power generation target power is set to the rated power multiplied by the ECO mode coefficient α calculated in step S103 (step S113). If the operation mode of the own unit is not the ECO operation mode (step S112: No), the operation mode is assumed to be the conventional burden sharing control mode in which no operation mode is set, and the operation mode is forcibly set to the FULL operation mode in which operation is performed within the range of the rated capacity (step S106).

Once the target power according to the operation mode is determined, the control target value of the own unit is calculated (step S114). The private power generating unit controller Crl determines the load share of the own unit from the output status information of all private power generating units, including the output status information of the own unit (current load share (generator output)), and the operation mode information of all private power generating units, including the operation mode information of the own unit, and calculates the control target value of the own unit that corresponds to this determined load share. Specifically, the current load share (generator output) of each private power generating unit is obtained from the output status information of all private power generating units, including the output status information of the own unit, and these are summed to determine the load amount of the load L. Once the load amount is determined, the load share amount of each private power generating unit for the load amount of the load L is determined as the control target value according to the operation mode.

Next, the private power generating unit controller Crl outputs a control command to the own unit that corresponds to the control target value of the own unit (step S115). When the control command is output, the private power generating unit controller Crl executes control so that the output of the own unit becomes the load share based on the control target value while checking the state of the own unit (generator output) (step S116). When the processing of step S116 ends, the process returns to step S101, and the operations from step S101 onwards are repeatedly executed. These operations are performed automatically.

Here, in the above flowchart, the processing operation of step S101 in which the status information and operation mode information of the own unit are transmitted to all other private power generating device controllers Crl and the status information and operation mode information of all other private power generating devices are received from all other private power generating device controllers Crl will be described using an example in which there are four private power generating device controllers, namely private power generating device controllers No. 1, No. 2, No. 3, and No. 4 (Crl1, Crl2, Crl3, Crl4). Figure 6 shows details of the processing operation of step S101 in each private power generating device controller Crl1 to Crl4, where (a) is for private power generating device controller No. 1 (Crl1), (b) is for private power generating device controller No. 2 (Crl2), (c) is for private power generating device controller No. 3 (Crl3), and (d) is for private power generating device controller No. 5 shows the details of the processing operation of step S101 for private power generating unit controller No. 4 (Crl4). When private power generating unit controller No. 1 (Crl1) checks the output state of its own unit (private power generating unit No. 1) in step S116 of FIG. 5, it transmits a data signal of the output state and operation mode of its own unit (private power generating unit No. 1) (step S201). When the transmission of step S201 is made, private power generating unit controllers No. 2 (Crl2), No. 3 (Crl3), and No. 4 (Crl4) each receive the transmitted data of private power generating unit controller No. 1 (Crl1) (steps S301, S401, S501).

Furthermore, the private power generating unit controller No. 2 (Crl2) is triggered by receiving the transmission data of the private power generating unit controller No. 1 (Crl1) (step S301) to transmit a data signal of the output state and operation mode of its own unit (private power generating unit No. 2) confirmed in step S116 of FIG. 5 (step S302). When the transmission of step S302 is made, the private power generating unit controllers No. 1 (Crl1), No. 3 (Crl3), and No. 4 (Crl4) each receive the transmission data of the private power generating unit controller No. 2 (Crl2) (steps S202, S402, S502).

Furthermore, the private power generating unit controller No. 3 (Crl3) is triggered by receiving the transmission data of the private power generating unit controller No. 2 (Crl2) (step S402) to transmit a data signal of the output state and operation mode of its own unit (private power generating unit No. 3) confirmed in step S116 of FIG. 5 (step S403). When the transmission of step S403 is made, the private power generating unit controllers No. 1 (Crl1), No. 2 (Crl2), and No. 4 (Crl4) each receive the transmission data of the private power generating unit controller No. 3 (Crl3) (steps S203, S303, S503).

Furthermore, the private power generating device controller No. 4 (Crl4) transmits data signals of the output state and operation mode of its own unit (private power generating device No. 4) (step S504) triggered by receiving the transmission data of the private power generating device controller No. 3 (Crl3) (step S503). When the transmission of step S504 is made, the private power generating device controllers No. 1 (Crl1), No. 2 (Crl2), and No. 3 (Crl3) each receive the transmission data of the private power generating device controller No. 4 (Crl4) (steps S204, S304, and S404). In this way, the private power generating device controllers No. 1 (Crl1), No. 2 (Crl2), No. 3 (Crl3), and No. 4 (Crl4) transmit and receive data signals of the output state and operation mode in numerical order starting from No. 1.

After collecting information on the output status and operation mode of all the private power generating device controllers Crl1, Crl2, ... Crln connected to the load bus BL, each private power generating device controller calculates the control target value for its own unit (its corresponding private power generating device) and outputs a control command to its own unit (its corresponding private power generating device).

Next, we will explain an example of load sharing control when there are four private power generation device controllers, No. 1, No. 2, No. 3, and No. 4 (Crl1, Crl2, Crl3, and Crl4), that is, when the four private power generation devices, No. 1, No. 2, No. 3, and No. 4, are operated in parallel.

Figures 7(a) and (b) show the load-shared output power in the form of a bar graph for each of the private power generating units No. 1, No. 2, No. 3, and No. 4. The left side of the page shows the load-shared state according to the rated capacity ratio. The height of the bar graph indicates the rated capacity of each of the private power generating units No. 1, No. 2, No. 3, and No. 4.

In FIG. 7(a), the rated capacity of the private power generating device No. 4 is half that of the private power generating devices No. 1, No. 2, and No. 3, and the ratio of the rated capacities of the private power generating devices No. 1, No. 2, No. 3, and No. 4 is 2:2:2:1. The shaded area indicates the total power, i.e., the total load, which is shared among the private power generating devices No. 1, No. 2, No. 3, and No. 4 according to the ratio of the rated capacity. In contrast, the right side of the page shows the state in which the load is shared according to the operation mode. Here, the operation mode of the private power generating device No. 1 is a NOLOAD operation mode in which the target power generation is set to 0 and control is performed to transmit as little load power as possible. The operation mode of the private power generating device No. 2 is a HALF operation mode in which the load is shared at a capacity ratio of half the rated capacity. The operation mode of the private power generating device No. 3 is an ECO operation mode in which the device operates at the output power with the lowest fuel consumption rate. The operation mode of the private power generating device No. 4 is a FULL operation mode in which the load is shared at a rated capacity ratio. These operation modes are set in advance by the user. Since the operation mode of the private power generating device No. 1 is a NOLOAD operation mode, the load sharing amount is 0 and the device is excluded from the load sharing target. Furthermore, the operation mode of the private power generating device No. 3 is an ECO operation mode, and the load sharing amount is the output power with the lowest preset fuel consumption rate. Since the operation mode of the private power generating device No. 2 is a HALF operation mode and the operation mode of the private power generating device No. 4 is a FULL operation mode, the load amount obtained by subtracting the preset load sharing amount output by the private power generating device No. 3 in the ECO operation mode from the total load amount is set to the private power generating device No. 2 and the private power generating device No. The remaining load is then apportioned between private power generating equipment No. 2 and private power generating equipment No. 4 to determine the remaining load share. Here, the apportionment ratio between private power generating equipment No. 2 and private power generating equipment No. 4 is 1/2 the rated capacity for private power generating equipment No. 2, and the rated capacity for private power generating equipment No. 4 is 1/2 the rated capacity for private power generating equipment No. 2, so the apportionment ratio between the two is 1:1. The shaded areas are the load shared between private power generating equipment No. 1, No. 2, No. 3, and No. 4 depending on the operating mode.

Next, FIG. 7(b) explains how to deal with the case where the total load increases and exceeds the load that can be covered by the set load sharing in the state where the load is shared according to the operation mode. Before the load increase, the operation mode of the private power generating device No. 1 is set to the HALF operation mode, the operation mode of the private power generating device No. 2 is set to the HALF operation mode, the operation mode of the private power generating device No. 3 is set to the FULL operation mode, and the operation mode of the private power generating device No. 4 is set to the NOLOAD operation mode, and the total load is shared according to these operation modes. Here, if the total load increases and exceeds the maximum load that can be covered by the load sharing according to the above operation modes, the operation modes of all the private power generating devices No. 1, No. 2, No. 3, and No. 4 are forcibly changed to the FULL operation mode in which the load sharing is apportioned according to the rated capacity ratio. In the FULL operation mode, the load is shared at the rated capacity ratio, so the maximum load that can be tolerated is the largest. Therefore, even if a large load is connected in the load sharing control mode, the required output power can be supplied to the load.

Second Embodiment
In the above embodiment, the operation mode is set by the user. In contrast, in the present embodiment, the private power generating apparatus with a low fuel consumption rate is automatically set to the FULL operation mode, which has a large load share. A fuel transfer meter is connected between each private power generating apparatus and the fuel tank to measure the fuel consumption of each private power generating apparatus. Also, a power detector is connected between each private power generating apparatus and the breaker to measure the output power of each private power generating apparatus. Here, the output power is measured through a current detector consisting of an instrument current transformer CT and a voltage detector consisting of an instrument transformer VT as the power detector. The measured output power is calculated from the fuel consumption to obtain the output power/fuel consumption, which is the output power per unit of fuel consumption, and the fuel consumption efficiency of each private power generating apparatus is calculated. When the fuel consumption efficiency of each private power generating apparatus is calculated, the operation mode of the private power generating apparatus with the highest fuel consumption efficiency is automatically set to the FULL operation mode. Also, the operation mode of half of the private power generating apparatuses with the highest fuel efficiency among the private power generating apparatuses may be automatically set to the FULL operation mode. This has the effect of improving the fuel efficiency of the power generation system.

Third Embodiment
In this embodiment, the private power generating apparatus controller performs a fault diagnosis or a fault sign diagnosis on the corresponding private power generating apparatus. For private power generating apparatus diagnosed as faulty as a result of the fault diagnosis, the private power generating apparatus controller automatically controls the operation mode to a NOLOAD operation mode in which load power is not transmitted as much as possible. In addition, for private power generating apparatus diagnosed as having a fault sign as a result of the fault sign diagnosis, the private power generating apparatus controller may also automatically control the operation mode to a NOLOAD operation mode. With the above configuration, the power generation system can be operated stably without being affected by a faulty private power generating apparatus or a private power generating apparatus that is likely to fail.

(Fourth embodiment)
In this embodiment, the operation mode is not directly inputted and set in the private power generation device controller, but the type of power generation device and the equipment status (healthy, bad condition, operation not recommended, etc.) are inputted in advance, and the private power generation device controller automatically selects the operation mode according to the input information. For example, in the case of a private power generation device using a diesel engine, due to the characteristics of the diesel engine, the fuel consumption is good but low load operation is not preferable. Therefore, an operation mode with a large load share is selected. Also, the fuel consumption of a gas turbine is poor but low load operation is possible. Therefore, an operation mode with a small load share is selected. Also, by inputting the equipment status into the private power generation device controller, a failure diagnosis or a failure sign diagnosis is performed according to the input items. If the result of the failure diagnosis or failure sign diagnosis indicates that there is a failure or a failure sign, the private power generation device controller automatically controls the operation mode of the corresponding private power generation device to the NOLOAD operation mode. With the above configuration, the power generation system can be operated stably without being affected by a failed power generation device or a power generation device that is likely to fail.

Various embodiments and modifications of this disclosure are possible without departing from the broad spirit and scope of this disclosure. Furthermore, the above-described embodiments are intended to explain this disclosure and do not limit the scope of this disclosure. In other words, the scope of this disclosure is indicated by the claims, not the embodiments. Furthermore, various modifications made within the scope of the claims and within the scope of the meaning of the disclosure equivalent thereto are considered to be within the scope of this disclosure.

(Appendix 1)
A power generation system including a plurality of power generation devices that generate power and power generation device controllers that control the power generation devices, the power generation device controllers of the plurality of power generation devices being connected to each other via a communication line so as to be able to communicate with each other,
The power generation device controller sets the power generation device it controls to one of the following operation modes: a FULL operation mode in which the power generation device shares a load within a rated capacity range, a HALF operation mode in which the power generation device shares a load within a range of half the rated capacity, an ECO operation mode in which the power generation device shares a load according to a fuel consumption efficiency, and a NOLOAD operation mode in which the power generation device does not share a load; and collects information on the output states and the operation modes of other power generation device controllers and other power generation devices, and controls the output state of the power generation device.
Power generation system.
(Appendix 2)
When the plurality of power generation devices cannot output the electric power required for the load, the power generation device controller of the plurality of power generation devices sets the operation mode of the plurality of power generation devices to the FULL operation mode.
2. The power generation system of claim 1.
(Appendix 3)
the power generation unit controller of the plurality of power generation units calculates fuel consumption efficiencies of the plurality of power generation units, and sets the power generation unit with the highest fuel consumption efficiency, or the plurality of power generation units with the highest fuel consumption efficiency, to the FULL operation mode;
3. The power generation system according to claim 1 or 2.
(Appendix 4)
the power generation device controller performs a fault diagnosis or a fault sign diagnosis on the power generation device, and sets a power generation device diagnosed as having a fault or a fault sign as a result of the fault diagnosis or the fault sign diagnosis to the NOLOAD operation mode.
4. The power generation system according to claim 1 .
(Appendix 5)
the power generation unit controller automatically selects the operation mode in accordance with the power generation unit model or equipment status input for the power generation unit;
5. The power generation system according to claim 1 .
(Appendix 6)
A power generation control method for a power generation system including a plurality of power generation devices that generate power and power generation device controllers that control the power generation devices, the power generation device controllers of the plurality of power generation devices being connected to each other via a communication line so as to be able to communicate with each other, the method comprising the steps of:
A step in which the power generation device controller sets the power generation device it controls to one of an operation mode of a FULL operation mode in which the power generation device shares a load within a rated capacity range, a HALF operation mode in which the power generation device shares a load within a range of half the rated capacity, an ECO operation mode in which the power generation device shares a load according to a fuel consumption efficiency, and a NOLOAD operation mode in which the power generation device does not share a load;
collecting information on the output states and the operation modes of other power generation device controllers and other power generation devices, and controlling the output states of the power generation device;
A power generation control method comprising:

1 Private power generation system, 10 Memory unit, 11 RAM, 12 Communication I/F, 13 CPU, 14 Bus, G1, G2 Private power generation device, CT Current transformer, VT Voltage transformer, CBg Generator circuit breaker, Ci1, Ci2 Control command, Crl, Crl1, Crl2, Crl3, Crl4 Private power generation device controller, CL, CL1, CL2 Communication line, Mc1 Generator main circuit, BL Load bus, L Load, Crla Start/stop control unit, Crlb Synchronization control unit, Crlc Private power generation control mode setting unit, Crld Private power generation load sharing calculation control unit, Crle Private power generation output quantity input/output unit, Crlf Other power generation output state information input unit, Crlg Each generator rating storage unit, Crlh Private power generation operation mode setting unit, Crli Storage section for each generator operation mode.

Claims (6)

A power generation system including a plurality of power generation devices that generate power and power generation device controllers that control the power generation devices, the power generation device controllers of the plurality of power generation devices being connected to each other via a communication line so as to be able to communicate with each other,
The power generation device controller sets the power generation device it controls to one of the following operation modes: a FULL operation mode in which the power generation device shares a load within a rated capacity range, a HALF operation mode in which the power generation device shares a load within a range of half the rated capacity, an ECO operation mode in which the power generation device shares a load according to a fuel consumption efficiency, and a NOLOAD operation mode in which the power generation device does not share a load; and collects information on the output states and the operation modes of other power generation device controllers and other power generation devices, and controls the output state of the power generation device.
Power generation system. When the plurality of power generation devices cannot output the electric power required for the load, the power generation device controller of the plurality of power generation devices sets the operation mode of the plurality of power generation devices to the FULL operation mode.
The power generation system according to claim 1 . the power generation unit controller of the plurality of power generation units calculates fuel consumption efficiencies of the plurality of power generation units, and sets the power generation unit with the highest fuel consumption efficiency, or the plurality of power generation units with the highest fuel consumption efficiency, to the FULL operation mode;
The power generation system according to claim 1 . the power generation device controller performs a fault diagnosis or a fault sign diagnosis on the power generation device, and sets a power generation device diagnosed as having a fault or a fault sign as a result of the fault diagnosis or the fault sign diagnosis to the NOLOAD operation mode.
The power generation system according to claim 1 . the power generation unit controller automatically selects the operation mode in accordance with the power generation unit model or equipment status input for the power generation unit;
The power generation system according to claim 1 . A power generation control method for a power generation system including a plurality of power generation devices that generate power and power generation device controllers that control the power generation devices, the power generation device controllers of the plurality of power generation devices being connected to each other via a communication line so as to be able to communicate with each other, the method comprising the steps of:
A step in which the power generation device controller sets the power generation device it controls to one of an operation mode of a FULL operation mode in which the power generation device shares a load within a rated capacity range, a HALF operation mode in which the power generation device shares a load within a range of half the rated capacity, an ECO operation mode in which the power generation device shares a load according to a fuel consumption efficiency, and a NOLOAD operation mode in which the power generation device does not share a load;
collecting information on the output states and the operation modes of other power generation device controllers and other power generation devices, and controlling the output states of the power generation device;
A power generation control method comprising:

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