JP2000175358A - Distribution system supervisory control system and recording medium for recording program for operating the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent misoperation of an operator by judging the ON/OFF state of a switch of a distribution system, from the change of a load current of a distribution line. SOLUTION: This supervisory control system is provided with a remote supervisory control unit 2 which inputs and transmits the ON/OFF state of a switch of distribution system and data of current value of a distribution line, a supervisory control unit 1 which receives the data sent from the unit 2 and performs supervisory control of the distribution system, and a display operation unit 3 displaying the supervised result. The supervisory control unit 1 is equipped with a data input means 31 which receives and stores current values of the distribution line which are sent from the unit 2, a system loop judging means 33 which calculates the correlation a plurality of current value data stored in the data input means 31, and judges from the calculated result whether the distribution system constitutes a loop system, and an informing means 32 for outputting the judged result.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power distribution system monitoring and control system for monitoring and controlling power distribution equipment (hereinafter referred to as equipment) constituting a power distribution system, and a recording medium for operating the system.

[0002]

2. Description of the Related Art In general, a power distribution system is configured to supply power to each customer via a distribution line divided into a plurality of parts by a switching device of a distribution circuit breaker or a switch.
Charging and blackouts in each section of distribution lines divided into multiple sections,
Alternatively, in order to grasp a system state such as a power interchange state with another distribution line, the distribution system monitoring and control system uses a distribution breaker or a remotely controllable switch (hereinafter referred to as a remote control switch). With respect to the equipment of (1), information on the on / off state of the equipment is input via the remote monitoring control device, and the state of the equipment and the system state are automatically updated according to the change in the state.

On the other hand, switches that cannot be remotely controlled (hereinafter referred to as switches)
In the case of a manual switch), the local operator operates the on / off state of the manual switch under the instruction of the operator while communicating wirelessly with the operator of the monitoring and control device. Change state. Thereafter, the on-site worker wirelessly communicates the operation result to the operator, and the operator who has received the report updates the switch state and the system state of the monitoring and control device so as to match the actual system state.

As described above, in the distribution system monitoring and control system, the system is operated while grasping the on / off state of the facilities constituting the distribution system, the charging / discharging state of the distribution line, and the like.
A warning message will be displayed if there is a possibility that a power failure may occur on the distribution system when the operator operates the equipment, or if there is a possibility that a loop system may be configured. So that there is no erroneous operation.

Hereinafter, a conventional system will be described with reference to FIGS.

FIG. 23 is a diagram showing a configuration of a conventional distribution system monitoring and control system. In FIG. 1, the distribution system monitoring and control system includes a monitoring and control device 1, a remote monitoring and control device 2, and a display control device 3 for displaying system status to an operator. The monitoring control device 1
Is a data input unit 31 for inputting data from the remote monitoring control device 2, a current information storage unit 61 for storing current information among the input data, a system search unit 83, a system information storage unit 51, and a display control device. A switch operation executing means 81 for operating a switch of the power distribution system via the remote monitoring control device 2 in accordance with an operation instruction from 3 is provided, and these means are realized by a computer.

FIG. 3 is an example of a power distribution system diagram. In the equipment shown in FIG. 3, FCB1, FCB2, FCB
B3 is a distribution circuit breaker, switches SW3, SW7, and SW8 are interconnected remote control switches, and switches SW1, SW4, SW5, and SW
6, SW9 denotes a classical remote control switch, and switch SW2 denotes a manual switch. Of these facilities, manual switches (SW
Except for 2), remote control is possible.

The on / off state of the equipment that can be remotely controlled is captured by the data input means 31 via the remote monitoring control device 2 and stored in the system information storage means 51. In addition, the operator inputs the equipment state of the manual switch SW2 that cannot be remotely operated via the display control device 3 and stores the equipment state in the system information storage unit 51 by the switch operation execution unit 81.

For example, when the operator attempts to operate the interconnected remote control switch SW3, which separates the system, in the entering direction, the operating equipment and the operating direction are passed to the switch operation executing means 81 via the display control device 3. It is. Then, the switch operation execution means 81
Starts the system search means 83 and checks the system state. The system search means 83 is based on the system information storage means 51,
The power source is searched while sequentially tracing the switches in which the state is turned on. When it is found that the interconnection remote control switch SW3 is connected to two power sources, that is, the distribution circuit breakers FCB1 and FCB2, it is determined that the system is looped, and the result is transmitted to the switch operation execution means 81. return. Thereby, the switch operation execution means 81 alerts the operator by displaying on the display control device 3 that the loop system is occurring. This is because, if the power distribution system is operated in a loop state, if an accident occurs, a problem occurs in that the power failure range is widened, and if a power source is different, a system stability problem occurs.

[0010]

In a conventional distribution system monitoring and control system, the state of equipment that can be remotely controlled is taken into a computer via a remote monitoring and control device, and a manual switch is communicated with a field worker. The operator manually inputs the state to the computer while taking the action, and the determination whether the system is in a loop state is made based on the on / off state of the equipment held by the computer. For this reason, if the system is operated while it is inconsistent with the on-site system due to leakage of communication, etc., a loop judgment will be made in the wrong system state. There were problems such as doing.

The present invention has been made in view of the above circumstances, and a distribution system monitoring and control system capable of preventing an erroneous operation of an operator by judging a state of a system from a change in load current of a distribution line. It is intended to provide.

[0012]

In order to achieve the above object, a distribution system monitoring and control system according to a first aspect of the present invention provides a distribution system monitoring and control system, comprising: a plurality of switching units constituting a distribution system; A remote monitoring control device that inputs and transmits data including a current value, a monitoring control device that takes in data transmitted from the remote monitoring control device and performs monitoring control of a power distribution system, and a monitoring result of the monitoring control device. A power distribution system monitoring and control system having a display operation device for displaying, a data input means for capturing and storing a current value of a distribution line sent from the remote monitoring and control apparatus, and a plurality of currents stored by the data input means. A system loop determining means for determining whether or not the power distribution system forms a loop system based on the relevance of the value data, and outputting a determination result of the system loop determining means And a notification means that.

According to the first aspect of the present invention, it is determined whether or not the distribution system is looped by taking in the current of the distribution line, storing the current, and examining the mutual relation of a plurality of current value data. Is determined.

According to a second aspect of the present invention, a distribution system monitoring and control system according to the first aspect of the present invention suppresses the notification of the determination result at the request of an operator to the notification means of the first aspect, or
It has been decided that the suppression can be released.

According to the second aspect of the present invention, when the system loop determining means detects a loop state of the power distribution system, it checks setting information as to whether or not to notify the operator of the detection, and when the notification is made, Notify if set,
If no notification is set, no notification is made.

According to a third aspect of the present invention, there is provided a distribution system monitoring and control system according to the first aspect of the present invention, wherein the system loop determination means determines that the distribution system forms a loop system. Has a means for changing the color of the loop system and displaying it on the display operation device.

According to the third aspect of the invention, when a loop state is detected, the color of the loop system is changed and displayed on the display control device.

According to a fourth aspect of the present invention, there is provided a distribution system monitoring and control system according to the first aspect of the present invention, wherein a distribution line to be determined by a system loop determining unit is specified. With.

In the invention according to claim 4, it is determined whether or not the distribution line specified in advance is in a loop state.

According to a fifth aspect of the present invention, there is provided a distribution system monitoring and control system according to the first aspect of the present invention, wherein the distribution line connected to the switching means operated by an operator is determined by the system loop determination means. Was determined.

In the invention according to claim 5, it is determined whether or not the distribution line connected to the opening / closing means operated by the operator is in a loop state.

The distribution system monitoring and control system according to the invention of claim 6 is different from the distribution system monitoring and control system of claim 1 in that when the distribution system is in an unstable state, the system loop determination means is executed. A means for suppressing or canceling the suppression is provided.

According to the invention as set forth in claim 6, when the power distribution system is unstable such as when an accident occurs, the determination of the system loop state is not performed, thereby improving the reliability of the loop determination.

According to a seventh aspect of the present invention, there is provided a distribution system monitoring and control system according to the first aspect, wherein the system loop determining means stores the number of current values of the distribution line used for the determination and a reference value for the determination. Is provided by the operator.

In the invention according to claim 7, the maximum amount of current value history information stored during operation and the reference value for determining whether the distribution system forms a loop system can be changed.

The distribution system monitoring and control system according to the invention of claim 8 is a distribution system monitoring and control system according to claim 1, wherein the operation history of the opening / closing means is stored and the system loop determination means. Means for estimating, from the operation history, an opening / closing means which causes a loop when it is determined that the distribution system forms a loop system.

[0027] According to the invention described in [Claim 8], it is possible to estimate the equipment which has caused the occurrence of the loop system from the history of the operation performed by the operator.

According to a ninth aspect of the present invention, there is provided a power distribution system monitoring and control system according to the first aspect of the present invention, wherein the power distribution system having a manual switch as a switching means is different from the power distribution system monitoring and control system of the first aspect. Has determined that the distribution line connected to the manual switch whose open / closed state is off is to be determined by the system loop determining means.

In the invention according to claim 9, the distribution line connected to the manual switch, which is recognized as being in the off state by the monitoring and control device, is determined by the system loop determining means.

A distribution system monitoring and control system according to a tenth aspect of the present invention is the distribution system monitoring and control system according to the first aspect, wherein the system loop determining means determines that the distribution system forms a loop system. Is a flexible calculation means for performing a loop calculation for eliminating a loop state and creating a loop cancellation procedure, and a switch for executing the switch operation for executing the loop cancellation procedure and canceling the loop state. Operation means.

According to the invention as set forth in claim 10, when the occurrence of a loop system is detected, a flexible calculation for canceling the loop state is performed, a procedure for implementing the loop cancellation is created, and the switch is executed based on this procedure. Perform the operation.

[0032] The recording medium according to the invention of claim 11 is:
The function of executing the data input means for taking in and storing the current value of the distribution line and the mutual relation of the plurality of current value data stored by the data input means determine whether the distribution system forms a loop system. A program for realizing a function of executing a system loop determination unit to be determined and a function of executing a notification unit that outputs a determination result of the system loop determination unit is recorded.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment)
An embodiment will be described with reference to FIGS.

FIG. 1 is a block diagram showing a configuration of a distribution system monitoring and control system according to a first embodiment of the present invention. In FIG. 1, the distribution system monitoring and control system includes a monitoring and control device 1, a remote monitoring and control device 2, and a display control device 3 for displaying a system state to an operator. The monitoring control device 1 includes a data input unit 31 for inputting data from the remote monitoring control device 2, a current information storage unit 61 for storing current information of the input data, a system information storage unit 51, and a system in a loop state. The system includes a system loop determining unit 33 for determining whether or not a loop system has occurred, a notifying unit 32 for notifying that a loop system has occurred, and a loop state determination reference value 47. FIG. 2 is a flowchart of the system loop determining means.

Next, the operation of the present embodiment will be described with reference to FIGS. First, the data input means 31 included in the monitoring and control device 1 captures the state of the equipment and the passing current of the equipment via the remote monitoring and control device 2 at the time of state change, at a fixed period, or at the time of a request from the power distribution control and monitoring device 1, Is stored in the system information storage means 51, and the current value of the distribution line is stored in the current information storage means 61. The system loop determining means 33 sequentially takes out all the distribution lines managed by the monitoring and control apparatus 1 and sets them as the correlation determination source distribution line, that is, the distribution line serving as a reference for the correlation determination (step 1). The distribution line connected to the correlation determination source distribution line is searched based on the system information storage unit 51, and is set as the correlation determination destination distribution line, that is, the distribution line to be subjected to the correlation determination (step 2). Next, the retrieved current value of the distribution line at the correlation determination destination and the current value of the distribution line at the correlation determination source are extracted from the current information storage means 61 (step 3). Then, the degree of correlation (correlation strength) between the current value of the correlation determination source distribution line and the current value of the correlation determination destination distribution line is calculated (step 4).

Here, as a method of calculating the degree of correlation, for example, there is a method using a sample cross-correlation coefficient described in “Statistical processing of random data JS Bendad / AG Pearsol, Baifukan”. Next, this outline will be described.

First, a cross-correlation function is calculated by the following equation.

The cross-correlation function is

(Equation 1) Defined by

Here, γ is the number of delays, m is the maximum number of delays, h is the sampling time interval, Xn is the distribution line current n for loop determination, Yn is the distribution line current n for loop determination, N is the number of stored data, R ＾ xy (γh) is a true value Rxy (γh)
Means the estimated amount of Note that the number of delays means the number of samplings from the time when the distribution line current at the loop determination source changes to the time when the effect appears on the current at the distribution line at the loop determination destination.

Next, a sample cross-correlation coefficient is obtained using the above cross-correlation function.

The sample cross-correlation coefficient is

(Equation 2) Defined by

Where

(Equation 3) Note that the sample cross-correlation coefficient ρ （xy (γh) indicates the degree of correlation.

When the degree of correlation calculated in step 4, ie, the sample cross-correlation coefficient exceeds the loop state determination reference value, it is determined that the current is synchronously fluctuating due to the loop state of the system (step 5). When there are a plurality of distribution lines to which the correlation is determined, steps 3 to 5 are repeatedly performed.

When the system loop determining means 33 determines that the system is in a loop state, the system loop determining means 33 notifies the notifying means 32 of a distribution line constituting the loop system. The notification unit 32 displays the notified distribution line on the display control device 3 and outputs an alarm to the alarm output device 4 to notify the operator of the occurrence of the loop system.

Next, the above specific operation will be described with reference to the distribution system diagram of FIG. In FIG. 3, FCB1, FCB
2, FCB3 is a circuit breaker for power distribution, switches SW3, SW7,
SW8 is interconnected remote control switch, switch SW1, SW4, SW
5, SW6 and SW9 are divided remote control switches and switch S
W2 indicates a manual switch. All of these facilities, except for the manual switch (SW2), can be controlled remotely. Here, in the initial state of each switch, it is assumed that all interconnected remote control switches including the switch SW8 are in the OFF state, and that the manual switch SW2 and the divided remote control switch are all in the ON state. Therefore, in the section C3, power is supplied from the circuit breaker FCB1 side.

In this state, it is necessary to switch the system due to work or an accident, so that the switch SW8 is turned on and the switch SW2 is operated while communicating with the on-site operator to set the switch SW2 to the off state, thereby setting the section C3. It is assumed that an operation of supplying power from the circuit breaker FCB2 side was performed. However, since the switch SW2 is a manual switch, the monitoring and control device 1 is in spite of the fact that the actual equipment is in the ON state due to some mistake.
It is assumed that the state recognized by is in the off state.

In this state, the operator considers that the switching of the system has been performed normally, and is operating the system. However, as the actual system state, the distribution line from the circuit breaker FCB1 and the circuit breaker F
This means that the distribution line from CB2 is system-operated in a loop state. In this state, the data input means 31 captures the passing current of the distribution line flowing through the circuit breakers FCB1, FCB2, and FCB3 at regular intervals via the remote monitoring control device 2,
The current information is stored in the current information storage means 61 in time series.

Here, the current information storage means 6 will be described with reference to FIG.
1 will be described. In the current change history shown in FIG. 4, the equipment number indicates the breaker number of the distribution line, and indicates which distribution line the current data is. The time indicates the time of sampling (sampling) of the current value. That is, the time one sampling unit before t is set to t−1, 2
The time before sampling is represented by t-2, and the time before three samplings is represented by t-3. The time one sampling unit after t is represented as t + 1. As a result, for each distribution line,
Save the current value for each sampling. For example, at time t, the passing currents of circuit breakers FCB1, FCB2, and FCB3 are 110A, 100A, and 51A, respectively. The sampling interval is determined separately according to the capability of the current measuring device.

The current stored in the current information storage means 61 is based on the current passing through the circuit breakers FCB1 and FCB2.
When the system is operated in a loop state, it will change in the same way as the load changes. In addition, breaker FC
Since B3 is independent, it changes according to the load connected to the circuit breaker FCB3.

The system loop determining means 33 takes out FCB1 (step 1), and takes out FCB2 and FCB3 as facilities which may be connected by FCB1 (step 2). Next, the correlation between FCB1 and FCB2 and between FCB1 and FCB3 are examined. First, the change history of the current stored in the current information storage means 61 of the FCB1 and FCB2 is extracted (step 3), and the degree of correlation of the distribution line is calculated by a cross-correlation function (step 4). The degree of correlation is such that as the operation time in the loop system becomes longer, the current information storage means 61
And the passing current of FCB1 and FCB2, which is stored in the memory cell, fluctuates in synchronization with each other, indicating a high value. Next, it is determined whether or not the degree of correlation calculated in step 4 exceeds a loop state determination reference value (for example, 0.7) (step 5). If the calculated degree of correlation (sample cross-correlation coefficient) exceeds this reference value, it is determined that there is correlation, and the system is determined to be in a loop state.

Next, the degree of correlation is similarly calculated for the circuit breakers FCB1 and FCB3. As a result, the circuit breaker FCB1 and the circuit breaker FCB3 are independent systems, so that the current information storage
No strong correlation is found in the current stored in No. 1 and it is determined that the current is not in a loop state.

Thus, the system loop determining means 33
Passes the circuit breaker names FCB1 and FCB2 to the notification means 32 as the distribution lines determined to be in the loop state. Then, the notifying unit 32 displays on the display control device 3 that there is a possibility that a loop system exists, together with the distribution line name (circuit breaker name),
The operator is notified by outputting an alarm to the alarm output device 4.

As described above, according to the present embodiment, in addition to the conventional loop judgment based on the ON / OFF state of the equipment, the loop state is judged based on the change state of the current, so that the actual system and the monitoring control device can grasp the state. Even if there is a difference between the systems, the loop state can be determined with high reliability.

In this embodiment, the sample cross-correlation coefficient is used to determine the loop state. However, as one current value changes, the other current value changes in the same way. For example, a change in one current value and a change in the other current value are obtained as shown in the following equation, and a difference obtained by adding the difference by a fixed sampling number is equal to or less than a certain value (T). , It can be determined that a loop state has occurred.

[0055]

(Equation 4) The meaning of each symbol in the above formula is the same as that in formula (1).
Further, in the present embodiment, when the system loop determining means 33 finds a loop system, the operator is notified immediately. However, the determination result of the system loop determining means 33 and the remote monitoring control device 2 are used. The operator may be notified when there is a contradiction in the input equipment status.

(Second Embodiment) FIG. 5 is a block diagram showing a configuration of a distribution system monitoring and control system according to a second embodiment of the present invention. The difference from the first embodiment is that at the time of detecting the loop state of the power distribution system, an alarm suppression information storage means 34 for setting in advance whether or not to notify an operator of the detection as an alarm is provided. It is. Other configurations are
Since the configuration is the same as that of the first embodiment shown in FIG. 1, the same components are denoted by the same reference numerals and description thereof will be omitted.

In FIG. 5, the alarm suppression information storage means 34
Has information on whether or not to notify the operator through the alarm output device 4 when the system loop determining means 33 detects the loop state of the power distribution system. The information can be set in advance by the operator. When detecting the loop state of the system, the system loop determination unit 33 notifies the notification unit 32 of the detection of the loop state. The notifying unit 32 stores the alarm suppression information storage unit 3
From 4, the setting information of whether to notify the operator is extracted. When the setting is to notify the operator, an alarm is output to the alarm output device 4 to notify the detection of the loop state. On the other hand, when the notification is not set, no alarm is output and no detection of the loop state is notified.

FIG. 6 shows an example of the setting information in the alarm suppression information storage means 34. The alarm suppression information storage means of FIG. 6 has setting information for notifying or notifying an alarm for each distribution line constituting the distribution system. In FIG. 6, the circuit breaker name is used as the distribution line name. The notification unit 32 knows from the alarm suppression information storage unit 34 whether or not the distribution system in which the loop state has been detected is a target of alarm suppression. If it is not a target, no alarm is output to the alarm output device 4. If so, an alarm is output to the alarm output device 4.

The setting information of the alarm suppression information storage means 34 is not limited to the above example, but may have information indicating, for example, whether or not to notify the entire power distribution system. Further, in the above example, the notification unit determines from the alarm suppression setting information unit that notification is to be made or not to be notified. However, instead of the notification unit, the alarm output device performs notification with reference to the alarm suppression information storage unit. -It is good also as a structure which determines not to notify.

As described above, according to the present embodiment, when a loop state is detected, the operator can be notified or not notified of the detection of the loop state. Flexible operation such as not performing the operation can be performed.

(Third Embodiment) FIG. 7 shows a third embodiment of the present invention.
It is a block diagram which shows the structure of the distribution system monitoring control system of embodiment. The difference from the first embodiment is that a color change display information storage unit 3 for color changing and displaying a power distribution system detected as being in a loop state in the monitoring control device 1.
5 is provided. Other configurations are the same as those of the first embodiment shown in FIG. 1, and therefore, the same components are denoted by the same reference symbols and description thereof will be omitted.

In FIG. 7, when a system loop judging means 33 detects a loop state of a system, the system loop judging means 33 notifies the loop state.
The operator is notified from the display control device 3 through. The display control device 3 receives the display request of the power distribution system from the system loop determination unit 33, changes the color to the display color designated by the color change display information storage unit 35, and detects the power distribution that is in the loop state. Display the system.

FIG. 8 shows an example of setting information in the color change display information storage means 35. The color change display information storage means 35 in FIG. 8 has display color information of the power distribution system determined to be in a loop state. The notifying unit 32 includes a color change display information storage unit 35.
And sends a display request for a distribution line diagram including the distribution system determined to be in a loop state to the display control device 3.
The display control device 3 changes the display color of the distribution line with the set color and displays it.

In the above example, the notification means obtains the color change information from the color change display information storage means. However, the display control device, not the notification means, refers to the color change information storage means. It is good also as composition which acquires color change information.

As described above, according to the present embodiment, the power distribution system determined to be in the loop state is displayed in a different color, so that the operator can easily recognize the loop system. Can be.

(Fourth Embodiment) FIG. 9 shows a fourth embodiment of the present invention.
It is a block diagram showing the composition of the distribution system control system of an embodiment. The fourth embodiment is different from the first embodiment in that a system loop detection target specifying means 41 for specifying a target power distribution system for detecting a loop state is provided. Other configurations are the same as those of the first embodiment shown in FIG. 1, and therefore, the same components are denoted by the same reference symbols and description thereof will be omitted.

In the monitoring control device 1 of FIG. 9, the display control device 3 displays the distribution line on which the operator is to detect the loop state.
Then, the control unit 32 sets the identification information of the distribution line in the system loop detection target specifying unit 41. Thereafter, when the operator issues a loop state detection instruction, the system loop determining unit 33 extracts distribution line identification information for performing a loop state detection from the system loop detection target specifying unit 41, and performs a loop state determination on the distribution line. In addition, since the passing current of a circuit breaker or a switch can be used as the current of the distribution line, the following description will be made assuming that the switch name is used as the distribution line identification information.

Next, a specific operation will be described with reference to the distribution system diagram of FIG. The type and initial state of each switch are the same as in the first embodiment.

Now, it is assumed that the switch passing current value is sent from the switches SW1 and SW6 to the monitoring control device 1 via the remote monitoring control device 2. Operator is switch SW
The display control device 3 determines whether the distribution line to which the switch 6 belongs and the distribution line to which the switch SW1 belongs are in a loop state.
, The switch SW6 and the switch SW1 are designated. The specified information is stored in the system loop detection target designating unit 41, and the system loop determining unit 33 determines whether or not it is in a loop state.

FIG. 10 shows a system loop detection target specifying means 4.
1 is an example of the setting information in FIG. The system loop detection target designation means 41 has identification information (for example, a switch number) of a switch to be detected whether or not a loop state exists. The system loop determination unit 33 includes a system loop detection target designation unit 4.
1 is obtained, and a loop state detection process is performed on a distribution system including a switch having the identification information.

FIG. 11 is an example of another power distribution system for explaining the present embodiment. Here, the switch SW8 is an interconnection manual switch, and other switches are the same as those in FIG. The initial state of each switch is interconnected remote control switch SW3, S
It is assumed that W7 is in the off state, and the manual switch SW2 and the sectional remote control switch are all in the on state. In addition, the interconnection manual switch SW8
It is assumed that the monitoring control device 1 recognizes the ON state due to an erroneous setting by the operator despite the OFF state in the actual system. In this case, the monitoring control device 1 recognizes that the distribution line connected to the circuit breaker FCB1 and the distribution line connected to the circuit breaker FCB2 are in a loop state.
The system cannot recognize that it is not actually a loop state.

According to the present invention, the operator can control the display control device 3
, The switch SW6 and the switch SW1 are designated as loop detection targets. The specified information is stored in the system loop detection target designating unit 41, and the system loop determining unit 33 determines whether or not it is in a loop state. In this case, in the actual system, both the switch SW3 and the switch SW8 are in the off state, so that the current change state of the switch SW6 and the switch SW
The current loop state is not correlated, and the system loop determining means 33 indicates that the switches SW1 and SW6 are not in a loop state. Thus, even when the monitoring control device 1 recognizes that the actual system is not in the loop state, it is possible to detect that the actual system is not in the loop state.

As described above, according to the present embodiment, the operator can specify the target power distribution system for determining whether or not the power supply is in a loop state, so that the loop state of the power distribution system can be efficiently monitored. I can do it. In addition, by setting distribution lines at both ends of a switch to be loop-determined, it is possible to confirm the ON / OFF state of the switch.

(Fifth Embodiment) FIG. 12 is a block diagram showing a configuration of a distribution system monitoring and control system according to a fifth embodiment of the present invention. The difference from the first embodiment is that the switch operation executing means 81 for executing the remote control switch operation of the distribution system, and the operating device storage for storing the switch operated by the switch operation executing means 81 Means 82 and a system search means 83 for searching for a remote control switch adjacent to the operated switch. Other configurations are the same as those of the first embodiment shown in FIG. 1, and therefore, the same components are denoted by the same reference characters and description thereof will be omitted.

In the monitoring and control device 1, when the operator designates a switch of the power distribution system and performs an on / off operation by the switch operation executing means 81, the operated switch is stored in the operating device storage means. You. Then, the system search means 83 searches for a remote control switch directly adjacent to the stored switch.
Next, the system loop determining means 33 executes a loop state detecting process on the searched remote control switch.

Next, description will be made with reference to the distribution system diagram shown in FIG. The type and initial state of each switch are the same as in the first embodiment. Now, it is assumed that although the manual switch SW2 is actually in the ON state, the monitoring control device 1 recognizes the OFF state. Therefore, the section C3 is recognized as a power outage state.

In this state, the operation when the operator turns on the interconnection switch SW8 in order to eliminate the power failure in the section C3 will be described. When the operator performs the ON operation of the switch SW8 from the display control device 3, the information of the ON / OFF switch SW8 is stored in the operating device storage unit 82 by the switch operation execution unit 81 of the monitoring control device 1. You. FIG.
Is an example of information stored in the operating device storage unit 82, and stores the SW number of the switch operated by the switch operation unit 81. The system search unit 83 extracts the section adjacent to the switch SW8 and the switch information from the system information storage unit 51. SW8 is an interconnection switch, which interconnects two distribution lines. One distribution line is on the section C3 side, and the other distribution line is on the section C4 side. The system search means 83 searches the system information, finds out that the remote control switch closest to SW8 among the distribution lines on the section C3 is SW1, and similarly finds a switch on the section C4 side. It is known that the remote control switch closest to the switch SW8 is SW6. Next, the system loop determining means 33 determines whether the switches SW1 and S
For W6, a system loop determination process is performed. In this case, since the manual switch SW2 is actually in the ON state as described above, the distribution line on the section C4 side and the distribution line on the section C3 side are in a loop state by the ON operation of the switch SW8. For this reason, the system loop determining means 33 includes the switch SW
By the loop determination process for 1 and the switch SW6,
It detects that the distribution line connected to the switch is in a loop state.

As described above, according to the present embodiment, since the system loop state relating to the switch operated by the operator is automatically detected, the loop state of the distribution system can be monitored efficiently. Can be.

(Sixth Embodiment) FIG. 14 is a block diagram showing the configuration of a distribution system monitoring and control system according to a sixth embodiment of the present invention. The difference from the first embodiment is that an accident occurrence information storage means 3 which indicates whether or not a distribution system accident is occurring.
7 is additionally provided. Other configurations are shown in FIG.
Are the same as those in the first embodiment, and the same elements are denoted by the same reference numerals and description thereof will be omitted.

In FIG. 14, when a distribution system accident occurs and the data input means 31 recognizes the accident through the remote monitoring control device 2, the data input means 31 stores the accident occurrence information storage means 37 in the accident occurrence information storage means 37. Is recorded. When starting the loop determination process, the system loop determination unit 33 does not execute the system loop determination process when the information in the accident occurrence information storage unit 37 indicates that the distribution system fault is occurring. Thereafter, when the distribution system accident is resolved and the data input means 31 recognizes that the accident has been resolved through the remote monitoring control device 2, the data input means 31
Records information indicating that the accident has been resolved in the accident occurrence information storage means 37. When starting the loop determination process, the system loop determination unit 33 executes the system loop determination process when the information in the accident occurrence information storage unit 37 indicates that there is no distribution system failure.

FIG. 15 shows an example of the setting information in the accident occurrence information storage means 37. The in-fault occurrence information storage means in FIG. 15 has, for each distribution line, information indicating whether or not the distribution line is under an accident. In FIG. 15, the circuit breakers FCB1, FCB
2, FCB3 indicates a distribution line identifier in the monitoring and control device. When recognizing the distribution system accident, the system monitoring control means 31 sets the information on the distribution line in which the accident has occurred as the occurrence of the accident, and sets the information as no accident after the elimination of the accident.
The system loop determination unit 33 does not subject the distribution line in the state where an accident has occurred in the during-occurrence information storage unit 37 to the system loop determination processing among the systems to be subjected to the system loop determination.

As described above, according to the present embodiment, the system loop determination is not performed in an unstable state during the occurrence of an accident, so that an incorrect loop determination based on an unstable current value can be prevented. Can be.

(Seventh Embodiment) FIG. 16 is a block diagram showing a configuration of a distribution system monitoring and control system according to a seventh embodiment of the present invention. The difference from the first embodiment is that a means is provided in which the operator can arbitrarily set the maximum amount of the current value history information stored in the current information storage means 61 and the loop state determination reference value 47.

In FIG. 16, the monitoring control device 1 stores the current value obtained from the remote monitoring control device 2 and the data input means 31 in the current information storage means 61. Also, a loop state determination reference value used in the loop state determination processing of the system loop determination unit 33 is stored. The operator uses the display control device 3 to change the maximum amount of the current value history information stored in the current information storage unit 61 or the loop state determination reference value.

FIG. 17 shows an example of the current information storage means 61. The current value from the data input means 31 is chronologically
The current information is stored in the current information storage unit 61. The time series data increases with time, but the maximum storage amount is finite, so the operator sets a preset value for the maximum amount in advance. This set value is not fixed and can be changed by the operator. FIG. 17 shows the current information storage means 61 before and after the change of the maximum storage amount. In the example of FIG. 17, the maximum storage amount after the change is greater than before the change, but conversely, the maximum storage amount after the change can be reduced as compared to before the change.

FIG. 18 shows an example of the loop state determination reference value. In the loop state determination processing, the system loop determination unit 33 compares the value obtained as a result of the loop state determination processing with the loop state determination reference value (0.7), and obtains a value obtained as a result of the loop state determination processing. Is larger than the loop state determination reference value, the loop state is determined.

For example, if the accuracy of the current value used for determining the loop state is high, the current value history information is small, and
Even if the loop state determination reference value is relatively small, accurate determination can be performed.However, if the accuracy of the current value used for determining the loop state is low, the number of samples of the current value used for determination may be increased, It is necessary to take measures such as increasing the state determination reference value. In such a case, according to the present embodiment, the operator can arbitrarily set the maximum amount of the current value history information to be stored and the loop state determination reference value, so that flexible operation according to the state of the power distribution equipment or the power distribution system is possible. Monitor the loop status.

(Eighth Embodiment) FIG. 19 is a block diagram showing a configuration of a distribution system monitoring and control system according to an eighth embodiment of the present invention. The difference from the first embodiment is that the operation history storage means 86 for storing the history of the equipment operated by the operator and the loop factor based on the history stored in the operation history storage means 86 when detecting the loop state of the power distribution system. That is, a loop factor estimating means 85 for estimating the installed equipment and a switch operation executing means 81 for executing the switch operation are additionally provided. Other configurations are the same as those of the first embodiment shown in FIG. 1, and therefore, the same components are denoted by the same reference symbols and description thereof will be omitted.

In the monitoring control device 1, when the operator instructs the operation of the equipment from the display control device 3, the operation of the equipment is performed from the switch operation executing means 81 and the operation contents are stored in the operation history storage means 86. . When the system is in a loop state due to the operation of the equipment, the system loop determination unit 33 detects the loop system, and the loop factor estimation unit 85 determines the distribution line determined to be in the loop state (hereinafter, referred to as a loop determination distribution line). ). The loop factor estimating means 85 searches the operation equipment stored in the operation history storage means 86 in order from the latest one, and notifies the operator of the operating equipment estimated to be a loop factor.

The specific operation will be described with reference to the distribution system diagram of FIG. The type and initial state of each switch are the same as in the first embodiment. Therefore, the section C3 is the circuit breaker F
Electric power is supplied from CB1. In this distribution system, circuit breaker FCB2 is connected to section C3 due to work or accident.
When it is necessary to switch the system in order to supply power from the operator, first, the operator passes the operating equipment and the operating direction to the switch operation executing means 81 via the display control device 3.
The switch SW8 is operated by the switch operation execution means 81.
Is operated. The operation history of the operated switch SW8 is stored in the operation history storage unit 86.

FIG. 20 shows an example of information stored in the operation history storage means 86, in which the equipment number operated by the switch operation execution means 81 and the operation direction are stored. Similarly, switch SW2
Is operated while contacting the on-site operator,
The operation content is stored in the operation history storage unit 86. However, since the switch SW2 is a manual switch, the monitoring control device 1 is in spite of the fact that the switch SW2 is actually in the on state due to some mistake.
Is assumed to be in the off state. In this state, the operator is performing the intended system operation in which the system has been normally switched, but as the actual system state, the circuit breaker FCB1 and the circuit breaker FCB2 are system operated in a loop state. .

In this distribution system, when the system loop determining means 33 detects a loop state of the system, the loop factor estimating means 85 is notified of the circuit breaker names FCB1 and FCB2 as loop determining distribution lines. The loop factor estimating unit 85 retrieves the operation facilities in the operation history storage unit 86 in order from the latest one, and extracts the operation history of the facilities belonging to the loop determination distribution lines FCB1 and FCB2. Then, the switch setting of the switch SW2 is set as history information of the switch belonging to FCB1,
Switch SW8 as the history information of the switch belonging to CB2
Will be taken out. By displaying this result on the display control device 3, the operator can be notified of the cause.

As described above, according to the present embodiment, the operation history is stored, and the history is notified to the operator, so that the operator can identify the equipment that caused the system loop. It becomes possible to do.

(Ninth Embodiment) FIG. 21 is a block diagram showing the configuration of a distribution system monitoring and control system according to a ninth embodiment of the present invention. The difference from the first embodiment is that a system search unit 83 for searching for a remote control switch adjacent to a manual switch in an off state is additionally provided. Other configurations are the same as those of the first embodiment, and therefore, the same components are denoted by the same reference characters and description thereof will be omitted.

In FIG. 21, the system loop determining means 33
Obtains information on the manual switch in the OFF state from the system information storage unit 51, and then obtains information on a remote control switch adjacent to the manual switch from the system search unit 83. For the switches belonging to the distribution lines different from each other in the obtained remote control switch information, a loop state determination process is performed by the system loop determination unit 33. In the case where the power distribution system device 1 recognizes that the switch is in the off state, but actually has the switch in the on state, the determination result of the system loop determination unit 33 is that there is a loop system.

Next, a specific operation will be described with reference to the distribution system diagram shown in FIG. The type of each switch is the same as in the first embodiment. The state of each switch is connected to the remote control switch S
W3 and SW7 are in the OFF state, sectional remote control switches SW1 and SW
4, SW5, SW6, and SW9 are in the ON state. Also, although the manual switch SW2 is actually in the ON state,
It is assumed that the monitoring control device 1 recognizes that the state is the off state. Therefore, in order to prevent the section C3 from being a power failure section, the interconnection switch S
It is assumed that the operation is performed with W8 in the ON state.

In this state, in the monitoring and control device 1, for example, at regular intervals, the system loop determining means 33 obtains information on the off-state manual switch from the system information storing means 51, and then receives the information from the system searching means 83. Obtain remote control switch information adjacent to the manual switch. In FIG. 3, since SW2 is a manual switch in an off state, the system search unit 83 obtains SW1, SW4, and SW8 as remote control switches closest to SW2 from the system section and switch connection information. Here, switch SW
Reference numeral 3 also denotes an adjacent remote control switch, but is an interconnection switch, and is removed from the target because it is in an off state.

Further, the system search means 83 is provided with a switch SW.
Check the distribution lines belonging to 1, SW8 and SW4, and check the switch SW1
And SW4 are connected to the circuit breaker FCB1 and therefore belong to the same distribution line, and the switch SW8 belongs to a distribution line different from the switches SW1 and SW4. System loop determination means 33
Obtains the switch information of the switches SW1 and SW8 belonging to the different distribution lines from the system search means 83, and performs a system loop determination process on the switches. As a result, the system loop determining means 33 knows that the distribution lines are looped.

As described above, according to the present embodiment, the loop state of the power distribution system can be detected automatically, so that the loop state of the power distribution system can be monitored efficiently.

(Tenth Embodiment) FIG. 22 is a block diagram showing a configuration of a distribution system monitoring and control system according to a tenth embodiment of the present invention. The difference from the first embodiment is that, when a system loop state is detected, a flexibility calculation for canceling a loop state is performed, and a flexibility calculation means 71 for creating a loop cancellation execution procedure, and a flexibility calculation means 71 are provided. That is, the switch operation execution means 81 for executing the loop cancellation execution procedure and canceling the loop state is additionally provided. Other configurations are the same as those of the first embodiment shown in FIG. 1, and therefore, the same components are denoted by the same reference symbols and description thereof will be omitted.

Now, in the distribution system shown in FIG.
Suppose that it is determined that the distribution line in section C3 and the distribution line in section C2 are in a loop state because 2 is in the on state. In FIG. 22, an accommodation calculation means 71 performs an accommodation calculation for eliminating a loop state. As a result, in the system of FIG.
It is assumed that a switching procedure of the switch SW8 is created as a loop elimination procedure. The procedure is passed to the switch operation execution procedure 81, and the switch operation execution procedure 81 executes the procedure through the remote monitoring control device 2, and the loop state is eliminated.

According to the present embodiment, when a system loop state is detected, the loop state can be automatically canceled, so that the loop state of the distribution system can be efficiently canceled.

The means described in each of the above descriptions is as follows:
As a program that can be executed by a computer, for example, the program can be written to a recording medium such as a magnetic disk, an optical disk, or a semiconductor memory and applied to various devices, or transmitted by a communication medium and applied to various devices. . The computer that implements the central processing reads the program recorded on the recording medium, and executes the above-described processing by controlling the operation of the program.

[0104]

As described above, according to the distribution system monitoring and control system of the present invention, the state of the system can be determined from the change in the load current of the distribution line, and an alarm can be output to the operator if necessary. , To prevent operator's mistaken operation,
A highly reliable monitoring and control of the distribution system can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a distribution system monitoring and control system according to a first embodiment of the present invention.

FIG. 2 is a flowchart of a system loop determining means in the system of FIG. 1;

FIG. 3 is a diagram illustrating an example of a distribution system suitable for applying the present invention.

FIG. 4 is a diagram showing a current change history for explaining current information storage means in the system of FIG. 1;

FIG. 5 is a block diagram showing a configuration of a distribution system monitoring and control system according to a second embodiment of the present invention.

FIG. 6 is a view for explaining alarm suppression storage means in the system of FIG. 5;

FIG. 7 is a block diagram showing a configuration of a distribution system monitoring and control system according to a third embodiment of the present invention.

FIG. 8 is a view for explaining a color change display information storage means in the system of FIG. 7;

FIG. 9 is a block diagram showing a configuration of a distribution system monitoring and control system according to a fourth embodiment of the present invention.

FIG. 10 is a diagram illustrating setting of switch identification information according to a fourth embodiment of the present invention.

FIG. 11 is a diagram showing an example of another distribution system suitable for applying the system of FIG. 9;

FIG. 12 is a block diagram showing a configuration of a distribution system monitoring and control system according to a fifth embodiment of the present invention.

FIG. 13 is a diagram showing an example of information stored in an operating device storage unit in the system of FIG. 12;

FIG. 14 is a block diagram showing a configuration of a distribution system monitoring and control system according to a sixth embodiment of the present invention.

FIG. 15 is a view for explaining an accident information storage unit in the system of FIG. 14;

FIG. 16 is a block diagram showing a configuration of a power distribution system monitoring and control system according to a seventh embodiment of the present invention.

FIG. 17 is a view for explaining current information storage means in the system of FIG. 16;

FIG. 18 is a view for explaining a loop determination reference value in the system of FIG. 16;

FIG. 19 is a block diagram showing a configuration of a distribution system monitoring and control system according to an eighth embodiment of the present invention.

FIG. 20 is a view for explaining operation history storage means in the system of FIG. 19;

FIG. 21 is a block diagram showing a configuration of a distribution system monitoring and control system according to a ninth embodiment of the present invention.

FIG. 22 is a block diagram showing a configuration of a distribution system monitoring and control system according to a tenth embodiment of the present invention.

FIG. 23 is a block diagram showing a configuration of a conventional distribution system monitoring and control system.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 monitoring control device 2 remote monitoring control device 3 display control device 4 alarm output device 31 data input means 32 notification means 33 system loop determination means 34 alarm suppression information storage means 35 color change display information storage means 37 accident occurrence information storage means 41 System loop detection target designation means 47 Loop state determination reference value 51 System information storage means 61 Current information storage means 71 Flexibility calculation means 81 Switch operation execution means 82 Operating device storage means 83 System search means 85 Loop factor estimation means 86 Operation history storage means

Claims (11)

[Claims] 1. A remote monitoring control device for inputting and transmitting data including an open / close state of a plurality of open / close means and a current value of a plurality of distribution lines constituting a power distribution system, and transmitted from the remote monitoring control device. In a distribution system monitoring and control system having a monitoring control device that captures data and monitors and controls a distribution system, and a display operation device that displays a monitoring result of the monitoring control device, a distribution line transmitted from the remote monitoring control device Data input means for taking in and storing the current value of the current, and system loop determining means for determining whether or not the power distribution system forms a loop system based on the mutual relationship between the plurality of current value data stored by the data input means. And a notifying means for outputting a judgment result of the system loop judging means. 2. The distribution system monitoring and control system according to claim 1, wherein said notification means can suppress notification of the determination result or cancel the notification at the request of an operator. 3. The system according to claim 1, further comprising means for changing the color of the loop system and displaying it on a display / operation device when the system loop determining means determines that the distribution system forms a loop system. Power distribution system monitoring and control system. 4. The distribution system monitoring and control system according to claim 1, further comprising means for designating a distribution line to be determined by said system loop determination means. 5. The distribution system monitoring and control system according to claim 1, wherein a distribution line connected to the switching means operated by an operator is to be determined by the system loop determination means. 6. The distribution system monitoring and control system according to claim 1, further comprising means for suppressing execution of the system loop determination means or canceling the suppression when the distribution system is unstable. . 7. The system loop determining means according to claim 1, further comprising means for allowing an operator to set the number of stored current values of the distribution line used for the determination and a reference value for the determination. Distribution system monitoring and control system. 8. A means for storing an operation history of the opening / closing means,
2. The distribution system monitoring control according to claim 1, further comprising: means for estimating a switching unit which causes a loop from the operation history when the distribution loop determination unit determines that the distribution system forms a loop system. system. 9. In a distribution system having a manual switch as switching means, a distribution line connected to the manual switch whose monitoring and control device recognizes that the switching state is off is determined by the system loop determining means. The power distribution system monitoring and control system according to claim 1, wherein 10. When the system loop determining means determines that the power distribution system forms a loop system, a flexible calculation for canceling a loop state is performed, and a flexible calculating means for creating a loop clearing execution procedure is provided. 2. The distribution system monitoring and control system according to claim 1, further comprising: a switch operation execution unit that executes a cancellation execution procedure and executes an operation of the switch unit for canceling the loop state. 11. A distribution system comprising a loop system based on a function of executing data input means for taking in and storing a current value of a distribution line and a mutual relation between a plurality of current value data stored by the data input means. A computer-readable program storing a program for causing a computer to execute a function of executing a system loop determination unit that determines whether to perform the determination and a function of executing a notification unit that outputs a determination result of the system loop determination unit recoding media.