JP3231403B2 - Automatic isolation device for busbars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus for automating the preparation of a work plan and the execution of the isolation work in the work of isolating a bus to be inspected when inspecting the bus and distribution equipment in a plant such as a power plant. The present invention relates to an automatic isolation device for use.

[0002]

2. Description of the Related Art Generally, inside a plant such as a power plant,
A plurality of buses are connected to each other via switching devices such as circuit breakers and disconnectors, and power distribution devices such as transformers, and by appropriately opening and closing these switching devices, various load devices such as electric motors. A power distribution system has been constructed so that the route for supplying power to the power supply can be changed.

Therefore, when checking the specified bus,
In order to cut off the route supplying power to the bus subject to inspection and to completely isolate the route from other buses, it is necessary to open a switchgear directly connected to the bus subject to inspection. If power is no longer supplied to the other buses by isolating the bus to be inspected from the other buses, the power supply to the other buses must be ensured by another route.

However, when switching the power supply route to the bus, an instantaneous power failure occurs in the bus. Therefore,
For equipment supplied with power from the bus where the instantaneous power failure has occurred, measures against instantaneous power failure such as restarting the equipment are required. In addition, for a device that is supplied with power from a bus that fails, it is necessary to take measures against the power failure, such as switching to a device of another system or a bus.

Conventionally, for such an operation of isolating a bus to be inspected and an operation of changing a power supply route, a specialist is required to provide a single-line diagram showing a connection relationship of each power distribution device and a control relationship between the components. The work plan is prepared while examining and evaluating the impact one by one with reference to the technical data such as the deployment connection diagram shown in the figure.The bus line isolation work is carefully performed according to this work plan while confirming the results. It had been.

[0006]

In planning a work plan in a plant equipped with a large number of buses and the like, and carrying out actual isolation work, sufficient skill, attention and much more labor are required. Therefore, a great burden was added to the specialized staff.

For example, assuming that a circuit breaker connected to a bus is to be opened, normally, if other devices connected to the circuit breaker do not enter a predetermined state, Interlocks are often provided to prevent this circuit breaker from opening. Therefore, an operation procedure of the circuit breaker in consideration of the existence of such an interlock is required.

Further, even if another power supply route to a certain bus is planned, an instantaneous power failure or the like occurs in the bus by changing the power receiving route, so that it is evaluated whether or not there is any device adversely affected by this. And it was necessary to take measures.

An object of the present invention is to provide a bus which can be easily prepared by automating a work plan required for inspecting a large number of buses and the like and implementing the work plan. To provide an automatic isolation device for use.

[0010]

[Means for Solving the Problems] Opening / closing of circuit breakers, disconnectors, etc.
Multiple buses are connected via power distribution equipment such as equipment and transformers.
Are connected to each other, and
Power distribution system with variable power supply path
Automatic isolation for the bus of the power supply system that supplies power to the switch
An opening / closing state of each switching device and each bus bar.
Supply of power from each bus and the state of distribution equipment such as voltage
Detects device status such as starting and stopping
Device state detecting means, and connection between the plurality of buses and each distribution device.
Connection, interrogation when operating and controlling the switchgear
Data and work plans and work plans
Various rules for implementation, including the opening of multiple switchgear
Stored knowledge data including rules for closing operation order
Knowledge data storage means, and any of the plurality of buses
Power from one bus before isolation
Ensure the supply status for a given bus and isolate the bus
Power from the bus where instantaneous or
Momentary power failure measures or power failure measures for the equipment
Command means for outputting a command signal to be executed, and the command means
Command signal from the
Device status and stored in the knowledge data storage means.
Inference based on knowledge data, and the content of the command signal
Power supply path that satisfies and forms this power supply path
Operating procedures for power distribution equipment and isolation of buses
Receiving power from the bus where the power failure or power failure occurs
Measures for instantaneous power outage or power outage for each device
Provide work planning means for planning.

The work planning means may infer.
Work plan and each equipment in the above-mentioned power supply system
Display means for displaying the status of the device; and
Therefore, while monitoring the state of the operating device,
Based on the work plan obtained by inference in the step,
Work plan for segregation of lines and measures against instantaneous power outages and power outages
Execution means, and the work by the work plan execution means
During execution of the device, the device monitored by the device status detection means.
Work whose vessel condition can be inferred by the work planning means
If the work plan is different from the plan,
The operation is interrupted.

Switchgears and transformers for circuit breakers, disconnectors, etc.
When multiple buses are connected to each other via power distribution equipment such as
In both cases, the power supply path is varied by opening and closing the switchgear.
Supply power to each device in the plant by the power distribution system
Automatic isolation device for the bus of the power supply system
And the distribution of the open / closed state of each switchgear and the voltage of each bus, etc.
Equipment status and equipment powered by each bus
Device status detection means for detecting device status such as starting and stopping
The connection relationship between the plurality of buses and each distribution device;
Data on interlocks when operating and controlling the closing device
Data and work plan
This is a kind rule, which is related to the opening / closing operation sequence of multiple switchgears.
Data storage that stores knowledge data including rules to perform
Means for connecting any one of the plurality of buses to another bus
Isolate from power line and determine power supply status before isolation
Power outage due to securing of buses and isolation of buses
Or equipment that supplies power from the bus where the power failure occurs
Signal to implement momentary power failure countermeasures or power failure countermeasures
Command means for outputting a signal, and a command signal from the command means.
Signal, the device status detected by the device status detection means,
And the knowledge data stored in the knowledge data storage means.
Make inferences based on the
Power supply path and distribution equipment for forming this power supply path
Instantaneous power failure or blackout due to operating procedures of the
Each device receiving power from the bus that generates power
A work plan for countermeasures against momentary power failure or power failure
Work planning means that can be inferred by said work planning means.
Work plan and each equipment in the above-mentioned power supply system
Display means for displaying the status of the device; and
Therefore, while monitoring the state of the operating device,
Based on the work plan obtained by inference in the step,
Work plan to isolate lines and take measures against momentary power failure or power failure
Execution means, and the work by the work plan execution means
During the execution of the above, the device status displayed on the display means is
Work plan operating device obtained by the work plan means
If the status is different from the status of the container, stop the operation by command
Is performed .

[0013]

The operator specifies the bus to be inspected to the work planning means by the command means, isolates the bus from other buses, secures the power supply state before this isolation to a predetermined bus, and further checks the bus. Prior to the isolation of the target bus, a command signal is output to take measures against momentary power failure and power failure of the bus.

[0014] The work planning means which has received the command signal performs connection planning between the buses and the respective power distribution equipment stored in advance in the knowledge data storage means, interlocks when operating and controlling the switchgear, planning of work plans, and the like. Invoke various rules when implementing the work plan.

Further, from the equipment state detecting means, the state of the power distribution equipment and the state of each equipment which is supplied with power from the bus are input, and a power supply path which satisfies the instruction content of the operator is provided. The inference is made on the operation procedure of the power distribution equipment required for the route formation, and the measures for the momentary power failure and the power failure for the equipment that receives power supply from the bus where the momentary power failure or power failure occurs due to the isolation of the bus. The inference result is displayed by the display means together with, for example, the equipment status of the in-house power supply system.

[0016] Next, the work plan executing means performs an instantaneous power outage countermeasure or a power outage countermeasure for the equipment receiving power supply from the bus according to the work plan created by the inference of the work planning means in response to an operator's instruction. In addition, work to isolate busbars is performed.

At this time, the work plan executing means issues an open / close signal to each switchgear, and performs the work while constantly monitoring the state of the equipment by the equipment state detection means. If is different from the plan, suspend the work and wait for the operator's instruction. Since the progress of the isolation work is displayed on the display means, the operator can monitor the progress of the work and issue an instruction to stop the work or the like from the command means.

[0018]

An embodiment of the present invention will be described with reference to the drawings. According to the present invention, as shown in the block diagram of FIG. 1, a knowledge data storage unit 1, a device state detection unit 2, a command unit 3,
Work plan means 4, display means 5, and work plan execution means 6
Are connected so as to exchange data with each other. Usually, each means is computerized. Further, the equipment state detecting means 2 and the work plan executing means 6 are respectively connected to an in-house power supply system 7.

If the power plant is taken as an example, the knowledge data storage means 1 stores data relating to the buses of the in-house power supply system 7 and the connection relations of the respective distribution devices, the logic for operating and controlling the respective distribution devices, and the like in the power plant. In addition, various rules for preparing a work plan and executing the work plan are stored.

For example, data relating to a bus includes a connection between a device supplying power and a bus grounding device, and a switching device such as a circuit breaker / disconnector is connected to another device directly connected thereto. The relationship, the breaker closing / closing interlock, and the like are stored.

The device status detecting means 2 is connected to each device of the in-house power supply system 7 and constantly detects the status of each device. For example, in an opening / closing device such as a circuit breaker or a disconnecting switch, the operation status of these operation switches is controlled. Signals from the respective devices are input and detected as information, such as the state, the open / closed state of the switchgear, the presence / absence of a voltage on the bus, and the start / stop status of devices and the like to which power is supplied from the bus.

The operator operates the instructing means 3 to isolate the bus to be inspected from other buses, and to secure power supply to a predetermined bus regardless of the isolation of the bus to be inspected. For a device that is supplied with power from a bus in which an instantaneous power failure or power failure occurs due to the isolation of the bus, a command signal for planning and execution is issued to the work planning means 4 so as to take an instantaneous power failure countermeasure or a power failure countermeasure. Is output.

When the work planning means 4 receives the command signal from the command means 3, the work planning means 4 makes an inference using the knowledge data stored in the knowledge data storage means 1 and the equipment status obtained from the equipment status detection means 2. Then, an electric power supply path that satisfies the contents of the command, an operation procedure of a switchgear and the like for forming this path, and a work plan such as an instantaneous power failure countermeasure and a power failure countermeasure are made.

In making the work plan, the inference unit 4b makes an inference while evaluating the effect of the equipment operation on the office system by the simulator 4a built in the work planning means 4. This inference result is displayed on display means 5 such as a CRT.
Will be displayed.

When the operator looks at the inference result displayed on the display means 5 and determines that the inferred power supply path cannot be adopted, the operator adds new conditions again by the command means 3 and re-applies. , The work planning means 4 can make inferences.

Next, the work plan executing means 6 is connected to the operation mechanism of each switching device of the in-house power system 7 of the power plant, and executes the work plan inferred by the work plan means 4 in accordance with a command from the operator. Based on the procedure, an operation signal is issued to each switching device of the power supply system 7 in the power plant.

In this way, if there is a bus that causes isolation of the inspection target bus or a power failure and a bus in which an instantaneous power failure occurs, a measure to be taken before an instantaneous power failure occurs among the instantaneous power failure countermeasures is implemented. This power failure countermeasure includes switching to another system, and a countermeasure to be taken before an instantaneous power failure occurs includes switching to another system.

Next, the buses to be inspected are isolated in accordance with the work planning procedure inferred by the work planning means 4.
If necessary, prior to isolating the bus to be inspected, power reception switching of the other buses is performed, and finally, of the instantaneous power failure countermeasures, measures to be performed after occurrence of the instantaneous power failure are implemented. Further, as a countermeasure after the occurrence of the instantaneous power failure, there is a restart of the device and the like.

How the state of the equipment changes in the course of a series of operations as described above is evaluated by the simulator 4a built in the operation planning means 4 when the operation plan is drafted. This is compared with the device status detected by the device status detecting means 2 to monitor whether the isolation operation is proceeding normally, and to interrupt the isolation operation if there is any abnormality.

Next, with regard to the operation of the above configuration, specific plans and work contents will be described. FIG. 2 is an in-house power supply system diagram showing a connection state of each bus bar at a normal time in a power plant. Each bus and devices such as a circuit breaker connected near the bus are protected by a metal cladding or a metal jacket called a power center together with each bus.

Therefore, each bus bar is hereinafter referred to as a metal clad or power center, and the abbreviation M /
C and power center abbreviations P / C.
First, the operator operates the command means 3 to display the local power system diagram of FIG. 2 on the screen of the display means 5. In the in-house power system diagram displayed at this time, the state of the equipment constituting the in-house power system is detected by the equipment state detecting means 2,
The results are shown together.

In FIG. 2 and FIG. 3 to be described later, the switchgear such as a circuit breaker / disconnector marked with a cross indicates an open state, and the switchgear not marked with a cross indicates a closed state for convenience. . Solid lines indicate electrically conductive lines, and broken lines indicate non-conductive lines.

That is, the metal clad M / C (A-1), M / C (A-2), M / C
(B-2) is supplied with electric power, and the metal clad M / C (A-1)
(H) and power is supplied to the power center P / C (A-1), and via the metal clad M / C (H),
Power is supplied to the power center P / C (H).

From the metal clad M / C (A-2), the metal clad M / C (E) and the power center P / C
(A-2) is supplied with power, and the power center P / C (E-1) is passed through the metal clad M / C (E).
), P / C (E-2).

Further, metal clad M / C (B-2)
, Power is supplied to the metal clad M / C (F) and a power center P / C (B-2) (not shown).
Power is supplied to power centers P / C (F-1) and P / C (F-2) (not shown) via the metal clad M / C (F).

Power is supplied to the metal clad M / C (SA-1) from the upstream line B. The power center P / C (SA-1) is supplied via the metal clad M / C (SA-1). SA-1). further,
Power is supplied from the metal clad and the power center to a number of devices (not shown).

Now, in order to periodically inspect the metal clad M / C (E) and the power center P / C (E-2), the operator is instructed to isolate them from other buses. Signals from command means 3 to work planning means 4
Output to According to this command, the work planning means 4 determines all routes connected to the metal clad M / C (E) and the power center P / C (E-2) from the knowledge data connection information of the knowledge data storage means 1. Explore.

The connection information of the knowledge data indicates a mutual connection state of power distribution equipment such as a bus, a circuit breaker, a disconnector, a transformer, and a cable connecting the power distribution equipment, which constitute an in-house power supply system. I have. In order to isolate the metal clad M / C (E) by searching for a switchgear based on such connection information, circuit breakers DG-A, RF, E1-1 are required.
, E2-1 and RA2 need to be opened. Further, in the line connecting between the metal clads, a switchgear may be present on each metal clad side, so that a further search is performed.

The metal clad M / C (E) and M / C (A
-2) has a disconnector DA2, and a line connecting the metal clad M / C (E) and M / C (F) has a circuit breaker RE. Therefore, by opening these switchgears, it is possible to cause a power outage including the line leading to the bus to be isolated, so that the safety of the inspection work can be further increased.

Next, a search for isolating the power center P / C (E-2) is performed. Search result Power center P / C
In order to isolate (E-2), circuit breakers E2-2, L-
It can be seen that E2 needs to be opened. Further, there is a circuit breaker E2-1 on the upstream side, but since this circuit breaker is already included in the isolation operation of the metal clad M / C (E), it is excluded from the search result.

In the power center, a power outage of a connection line between buses such as a metal clad is not particularly performed. This is because, unlike the type of bus connection between the metal clads, if a power failure occurs in the connection line between the power centers, there is a possibility of affecting other power centers.

When all the switchgears thus obtained are opened, the metal clad M / C which is the inspection target bus is opened.
(E) and the power center P / C (E-2) can be safely isolated. However, in this state, power supply to the power center P / C (E-1) that has received power from the metal clad M / C (E) of the bus to be inspected is lost, so that a new power supply path is required. It needs to be formed.

The work planning means 4 infers this new power supply path based on the knowledge data in the knowledge data storage means 1. First, as a route that can supply power to the power center P / C (E-1), metal clad M / C (E),
Power center P / C (H), P / C (E-2), P / C
(A-1), P / C (A-2) and P / C (SA-1) are conceivable.

Of these busbars, metal clad M /
Although C (E) and power center P / C (E-2) are the buses to be inspected, they cannot be used naturally, but the remaining power centers P / C (H), P / C (A-1), P / C (A-2
), P / C (SA-1).

The buses to which the power center P / C (E-1) can receive power supply have priorities set in advance and are registered in the knowledge data of the knowledge data storage means 1 as rules. When the highest priority is selected from the four power centers, the power center P
/ C (SA-1).

As described above, the work planning means selects the buses from the selectable buses in accordance with the priority set in advance by the work planning means 4, but the operator selects the buses from the command means 3 as necessary. It can also be instructed to receive power from a lower bus. However, here, the power center P / C (SA-1)
).

Power center P / C (SA-1) and P / C
The connection line (E-1) includes a disconnector M-SA1 and a circuit breaker LE-E1. Therefore, when these two switchgears are closed, the power center P / C (SA-1) changes to P / C (E
−1) is supplied. However, in this case, the breakers E1-2 and E1-1 of the current power supply route are used.
Must be opened, but for the circuit breaker E1-1,
Since it is already included in the isolation operation of the metal clad M / C (E), it is excluded here.

When the device state obtained by the device state detecting means 2 is compared with the target state of the switchgear among the switching operations obtained so far, the circuit breakers DG-A, RF, R-
It can be seen that no operation is required because E and L-E2 are already open. Accordingly, the switchgears actually operated include circuit breakers E1-1, E2-1, RA-A2, E1-2,
E2-2 and disconnector DA2 are opened, and circuit breaker LE1 and disconnector M-SA1 are closed.

As described above, the metal clad M / C (E) and the power center P / C (E-2) are isolated, and the metal clad M / C (E-1) is separated by the power center P / C (SA-1).
Power center P / C separated for isolation in (E)
A switchgear to be operated to supply power to (E-1) is required.

The power supply system diagram in FIG. 3 shows the result of operating various switchgears according to the above-mentioned work plan. Next, the switching power supply for realizing the power supply system in FIG. The operation procedure of the device will be described. When a switchgear to be operated is required, the work planning means 4 further determines an operation procedure by inference.

First, an operation procedure for switching power reception of the bus is determined, and a disconnector M-SA1 on a connection line of a power center, which is a new power supply route, is selected from among the switchgears to be operated.
To close.

Next, the circuit breaker LE1 is closed. This procedure is based on the rule that if there is a disconnector and a circuit breaker on one line, the disconnector will come first and the circuit breaker after closing, and the opener will come first and the disconnector after opening. Because there is. This operation procedure is determined based on a difference in the cutoff function between the circuit breaker and the disconnector, and the interlock cannot be operated in the reverse order.

Next, the circuit breaker E1-2 is opened. By opening the circuit breaker E1-2, the circuit breaker L-E1, which has been closed previously, is in an actual closed state. Generally, since a switching device such as a circuit breaker is generally controlled by a complicated interlock, even when an operator turns on an operation switch, an actual circuit breaker is not always turned on immediately.

FIG. 4 is a logic diagram of the closing interlock for the circuit breaker LE-E1. According to this, the circuit breaker L-
In order to close E1, the operation switch must be on and the circuit breaker E1-2 must be open (disconnector M-SA1).
And the circuit breaker SA1-2 are both closed).

Such an interlock is used to ensure that the power center always receives power supply through one line.
The power supply route of C (E-1) can be instantaneously switched (an instantaneous power failure occurs).

That is, when the operation switch of the circuit breaker L-E1 is kept on and the circuit breaker E1-2 is opened, the condition of the interlock which has prevented the closing of the circuit breaker L-E1 is released. Then, the circuit breaker L-E1 is closed at the same time as the circuit breaker E1-2 is opened.

In FIG. 4, "52CC" of the circuit breaker LE-E1 indicates a closing coil of an AC circuit breaker, "52" is an appliance number, and "CC" is an abbreviation of a closing coil. Therefore, when the closing coil is excited, the corresponding circuit breaker (LE1) is activated.
Is closed. Similarly, "52TC" (not shown) is a trip coil of the AC circuit breaker, and when the trip coil is excited, the corresponding AC circuit breaker is opened.

Such interlock data is included in the knowledge data of the knowledge data storage means 1, the interlock is evaluated by the simulator 4a provided in the work planning means 4, and the switchgear is actually turned on. An assessment is made as to whether The evaluation of the interlock as described above is performed in the process of inference and is reflected in the operation procedure of the switchgear. In addition, the simulator 4a also evaluates a change in the energized portion, a power failure, the occurrence of an instantaneous power failure, and the like.

Next, the circuit breaker E1-1 on the upstream side of the power center P / C (E-1) is opened, whereby the power receiving switching of the power center P / C (E-1) is completed. . Subsequently, an operation procedure of the switchgear for isolating the power center P / C (E-2) is obtained by inference. According to the rule that the switchgear is opened from the downstream side, the circuit breakers E2-2 and E2-1 on the line where the power center P / C (E-2) is receiving power are opened in this order.

Finally, in order to isolate the metal clad M / C (E), the remaining circuit breaker RA-A2 and disconnector DA-A2 are opened. The procedure is as follows. According to the rule in the case where the disconnector and the circuit breaker are present, the circuit breaker R-A2 and the disconnector DA-A2 are opened in this order. Thus, a procedure for safely and reliably realizing the in-house power supply system state shown in FIG. 3 is required.

As described above, the operation procedure is created in accordance with various rules determined in advance. However, such inference rules are all included in the knowledge data of the knowledge data storage means 1 and can be changed. Thus, it is possible to cope with an in-house power supply system of any configuration.

As described above, the power supply route and the operation procedure inferred by the work planning means 4 are displayed on the display means 5 as an in-house power supply system diagram and an isolation plan, and the work planning means 4 Each point where power is actually supplied via the supply path is evaluated.

For example, when the bus corresponding to the power source of the power center P / C (E-1) has moved from the metal clad M / C (E) to the power center P / C (SA-1), Transformer SA- on the upstream side of P / C (SA-1)
1 A new power center P / C (E-1
) Will increase.

Since the voltage of each distribution device is known, the change in the load current can be easily obtained by inputting in advance the power consumption of the device supplied with power from each bus. As described above, the evaluation result by the simulator 4a provided in the work planning means 4 is displayed on the display means 5, so that when a portion which is adversely affected to a certain degree or more occurs, the operator gives a new condition from the command means 3. By adding, for example, the work planning means 4 can easily infer another power supply route.

When the power supply destination is changed, it is necessary to take measures against the instantaneous power failure for the power center P / C (E-1) where the instantaneous power failure occurs. This countermeasure against instantaneous power failure is performed for the equipment supplying power from the bus, and the countermeasures differ depending on each equipment. However, since the countermeasures for each equipment are standardized, the knowledge data storage means 1 By storing the information in the knowledge data and searching as necessary, it is possible to plan a countermeasure against an instantaneous power failure for each bus in which an instantaneous power failure occurs.

The contents of the countermeasures for the instantaneous power failure include restart of the equipment, activation of equipment of another system, and the like, and there are also equipments which do not require any special measures. Further, as a countermeasure against an instantaneous power failure, there are a countermeasure to be performed before an instantaneous power failure occurs, and a countermeasure to be performed after an instantaneous power failure occurs and a return to a power receiving state. Such rules are also stored in the knowledge data of the knowledge data storage unit 1.

Next, the metal clad M /
It is necessary to take countermeasures against power outages at C (E) and the power center P / C (E-2). In the same manner as the instantaneous power failure countermeasure, the countermeasures for individual devices are stored in the knowledge data of the knowledge data storage unit 1 and searched as needed, so that a power failure countermeasure for the bus where the power failure occurs is planned.

The contents of the power failure countermeasures include the activation of other systems. In this way, the work planning means 4
Display means 5 for instantaneous power failure measures and power failure measures that were automatically planned
Is displayed, the operator can correct the instantaneous power failure countermeasure and the power failure countermeasure from the command means 3.

When the operator evaluates and confirms the contents of the countermeasure and permits execution from the command means 3, the work plan executing means 6
Automatically implements instantaneous power failure countermeasures and power failure countermeasures. There are two types of countermeasures against instantaneous power failures: one to be performed before an instantaneous power failure occurs, and one to be performed after an instantaneous power failure occurs and after returning to the power receiving state.
The work plan executing means 6 first executes measures to be taken before an instantaneous power failure occurs, such as activation of another system.

Next, the work plan executing means 6 automatically executes a power failure countermeasure. Power failure measures must be completed before the bus stops. Therefore, the power failure of the bus leads to the power failure countermeasures centering on the activation of other system equipment.

Next, the work plan executing means 6 performs bus line isolation in accordance with the determined operation procedure. The operations performed by the work plan executing means 6 include closing and opening operations of the switchgear. When the isolation of the bus is completed, the work plan executing means 6 executes the countermeasures for the momentary power failure after the momentary power failure of the bus has occurred and the bus has returned to the power receiving state. This operation includes a restart of the device.

The operation of the equipment performed by the work plan executing means 6 is performed by, for example, issuing an open or close signal to the circuit breaker. That is, a signal for exciting the trip coil or the closing coil is output from the work plan executing means 6.

Further, this result is obtained by the device state detecting means 2
Thus, the operation is performed while monitoring the state of each device. At this time, if the equipment state is different from the plan due to equipment failure or the like, the work plan execution means 6 interrupts the work and waits for an instruction from the operator.

For example, when the circuit breaker is operated, the circuit breaker that should be opened in the work plan does not open, or the bus that should be cut off due to the opening of the circuit breaker does not stop. By comparing the contents evaluated by the work planning means 4 with the simulator 4a during the planning process and the state of the equipment obtained by the equipment state detecting means 2, it can be determined whether the work is progressing normally.

Since the progress of the quarantine work is displayed on the display means 5, the operator monitors the progress of the work.
It is also possible to input a command signal for stopping the operation or the like from the command means 3. If the work plan means 4 evaluates the contents using the simulator 4a in the course of planning and the state of the equipment obtained by the equipment state detection means 2 is different, the cause must be investigated. Is displayed on the display means 5, and the device may be checked.

For example, in the case of a circuit breaker, it is possible that the interlock has been opened for some reason or that the circuit has been manually operated by a human. When the isolation work is continued after the cause is removed after the cause is identified, the instruction work 3 is instructed to the work plan execution means 6 to continue the work.

If the re-planning is instructed to the work planning means 4 with the state as an initial state, a work plan is made from that state, and an isolation work is performed according to the work plan.

[0078]

As described above, according to the present invention, the finger from the command means is
The inference unit of the work planning means uses the data of the knowledge data storage means and the equipment state detection means to generate a new power supply route and an operation procedure for forming the new power supply route when the inspection target bus is isolated by the command signal or the like. In addition, an instantaneous power outage and a power outage countermeasure for each device supplied with power from the bus in which an instantaneous power outage and power outage occur due to isolation of the inspection target bus are inferred.

The work plan executing means executes the work while monitoring the bus isolation method inferred by the work planning means, the instantaneous power failure countermeasures and the power failure countermeasures while monitoring the equipment status obtained by the equipment status detection means, and displaying the information. Displays the results of these inferences and the status of each device in the in-house system, so that work planning and isolation work required to check the bus can be performed easily, safely, and securely. This has the effect of reducing the burden on workers and improving reliability.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment according to the present invention.

FIG. 2 is a diagram of an in-house power supply system according to an embodiment of the present invention.

FIG. 3 is a diagram of an in-house power supply system based on bus isolation inference according to one embodiment of the present invention.

FIG. 4 is a logic diagram of a circuit breaker closing interlock according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Knowledge data storage means, 2 ... Device status detection means, 3 ...
Command means, 4 ... Work planning means, 4a ... Simulator, 4
b: inference unit, 5: display means, 6: work plan execution means, M
/ C: metal clad (bus), P / C: power center (bus).

Continuation of front page (58) Fields investigated (Int.Cl. ⁷ , DB name) H02J 3/04 H02H 7/22 H02J 3/00 H02J 13/00 311

Claims (2)

(57) [Claims] 1. A power distribution system in which a plurality of buses are interconnected via a switchgear such as a circuit breaker / disconnector and a power distribution device such as a transformer, and a power supply path is varied by opening / closing the switchgear. An automatic isolation device for the bus of the power supply system that supplies power to each device in the plant.
Te, the opening and closing state and the device-state detecting means for detecting a device state of the start and stop of devices that are powered from the state and the generatrix of the distribution device of the voltage of each generatrix of each switchgear, the plurality The connection relationship between the bus and each power distribution device , data on interlocks when operating and controlling the switchgear , and various rules for drafting a work plan and implementing the work plan, and opening and closing a plurality of switchgears. Regarding operation order
A knowledge data storage means for storing knowledge data including rules, wherein the plurality of one of the power supply state of isolation before the bus in together when isolated from other bus of the bus reserved for a given bus and bus Command means for outputting a command signal for implementing an instantaneous power failure countermeasure or power failure countermeasure for a device which is supplying power from a bus in which an instantaneous power failure or power failure occurs due to isolation of the power supply, a command signal from the command means, and the device state detection By means
Device state detected from the above and the knowledge data storage means
Performs inference on the basis of the knowledge data stored in a power supply path that satisfies the content of the finger <br/> command signal and operating procedures distribution device for forming the power supply path, the isolation of the bus a work program means to design work plan momentary power loss or stop <br/> electrostatic countermeasure for each device instantaneous power failure or power failure is supplied with electric power from the bus for generating, by Ri is inferred on the work program means a display means for performing status of each device in the resulting work plan Oyo <br/> beauty the plant power supply system, while monitoring the state of the operating device by the device state detection means, by inference in the work program means Got
Based on the work plan, comprising a work program executing means for performing isolation and momentary power loss or <br/> Power Failure of the bus, during the execution of work by the work plan execution means, like the device
The equipment status monitored by the status detection means is the work plan
If it is different from the work plan inferred by means,
The bus work automatic isolation device, wherein the work plan executing means interrupts the work being executed . 2. Switchgear for a circuit breaker, disconnector, etc., and transformer
Multiple buses are connected to each other via power distribution equipment such as devices
The power supply path can be changed by opening and closing the switchgear.
Power supply to each equipment in the plant by the power distribution system
Automatic isolation device for the bus of the power system
hand, Power distribution equipment such as the open / close state of each switchgear and the voltage of each bus
Of the equipment and the equipment supplied with power from each bus
Device state detecting means for detecting a device state such as start / stop, Connection relationship between the plurality of buses and each distribution device,
On interlocks when operating and controlling the device
And various rules for planning and implementing work plans.
The opening and closing operation sequence of the plurality of switchgears.
Knowledge data storage means storing knowledge data including rules
When, One of the plurality of buses is separated from other buses.
Power supply status before isolation to the specified bus
Instantaneous power outage or outage
Equipment that supplies power from the bus
Outputs instantaneous power failure countermeasures or command signals for implementing power failure countermeasures
Command means, Command signal from the command means, to the device state detection means
Device state detected from the above and the knowledge data storage means
Makes inferences based on the knowledge data stored in the
Power supply path that satisfies the contents of the
Operation procedure of distribution equipment to form roads and isolation of buses
Instantaneous power outage or power outage
Momentary power failure countermeasures or outages for each equipment supplied
Work planning means for drafting a work plan for electricity countermeasures; The work plan obtained by the work planning means and
And a table that displays the status of each device in the above-mentioned power supply system
Indicating means; The status of the operating device is monitored by the device status detecting means.
While obtained by inference in the work planning means
Based on the work plan, isolation of busbars and countermeasures for momentary power outages or
Work plan execution means to take power outage countermeasures With The display means during execution of work by the work plan execution means
Is displayed by the work planning means.
If the state of the work plan operating device is inferred and obtained
It is especially important to give an instruction to stop the work from the command means.
Automatic isolation device for busbars.