JPH03265432A - Supervisory control device for power system - Google Patents

Abstract

PURPOSE:To easily judge opening/closing state of a system opening/closing device by judging a substation of power receiving side at substation unit corresponding to the opening/closing state of the device, and displaying the name of the substation in a man-machine interface. CONSTITUTION:Power receiving substation judging means 50 judges the name of a power receiving substation based on stored contents of a system opening/ closing device information storage device 40 and a power source system information storage device 60. That is, the substation of the power receiving side is judged at a substation unit corresponding to the opening/closing state change of a system switch 5 of each substation by the means 50. A display functional unit 45 outputs opening/closing state information of the switch 5 from the storage device 40 and outputs the name of the power receiving substation from the storage device 60. Further, the unit 45 display a power system diagram in a man-machine interface 20.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a power system monitoring and control device that displays the open/closed status of a power system, especially the system currently receiving power, for each substation. Regarding.

(Prior Art) In general, each substation in a power system is a power transmission source, that is, a receiving light substation, which is equipped with system switching equipment such as circuit breakers and disconnectors, as well as transformers, etc., and a receiving light substation with almost the same configuration. The opening/closing operations of the system switching equipment and the monitoring of the opening/closing status thereof are performed via a remote monitoring and control device.

FIG. 7 shows an example of the configuration of a general power system that is subject to such power system monitoring and control. FIG. 7 is a power system diagram showing the components of the power system in terms of position, including two power receiving substations A and C (i.e. power transmission optical substations) 100 and 110, and two power receiving substations B and D. ! 20, 130 are shown. The A substation 100 includes circuit breakers TOI, IOA and disconnectors 102, 10.
4 is implemented as a system switchgear, and similarly, C substation 1
10 includes circuit breaker iii, 113 and disconnector 112
, 114, but the B substation 120 has disconnectors 121, 1
22 , 123 , 124 and a circuit breaker 125 , and further, the D substation 130 has disconnectors 131 , 132 , 13
3.

134 and circuit breaker 1.35 are each implemented as system switching equipment. B and D two power receiving substations 12
0 and 130 include transformers 128, 127 to 136, and 137, respectively, in addition to the above-mentioned system switching equipment, but these do not perform switching operations by themselves, and therefore are not directly related to the following explanation. Since there is no such thing, I will ignore this and proceed with the discussion.

FIG. 8 shows a conventional power system monitoring and control device, in which the system switching equipment 5 consisting of the above-mentioned circuit breaker and disconnector is shown.
When the open/close state changes, the open/close state is stored in the computer 1's system switch equipment information storage via the remote monitoring and control device 4 provided as a local slave station and the remote monitoring and control device 3 provided as a master station. The information is taken into the device 40 for each substation. The display function section 45 causes the man-machine interface device 20 to display a power system diagram as shown in FIG. 7 in accordance with the storage contents of the system switchgear information storage device 40. Each time the opening/closing status of the grid switching equipment 5 changes, the operator visually traces the opening/closing status of the power system on the power system diagram and monitors it while checking what changes have occurred in the opening/closing status of the grid. Perform control operations.

For example, to explain how the operator determines the open/close status of the system with reference to FIG. Judgment as to which of the C substations 100 is receiving power is made by looking at the open/close states of circuit breakers and new line switches in the system. For example, the circuit breaker lot and the disconnector 102,
121 and 123 are all “on,” or when the circuit breaker 103 and disconnectors 104, 122, and 124 are all “on,” it is determined that the B substation 120 is receiving power from the A substation 100. , circuit breaker in and disconnector 112 , 121 .

123 are all "on", or when the circuit breaker 113 and the disconnectors 114, 122, and 124 are all "on", it is determined that the B substation 120 is receiving power from the C substation 100.

In the field of power system technology, with the remarkable development, the latest technology is being applied to all system switching related equipment, thereby increasing the reliability of the power system and ensuring a stable supply of power. Furthermore, with the development of these technologies and the increase in the number of consumers, power systems are becoming more complex and large-scale.

In such a complex and large-scale power system, in order to judge the power received by a specific substation and monitor and control them, operators must visually track the open/close status of the system switching equipment17.
It is necessary to determine the status of power transmission and reception in the power system for each substation. For this reason, the burden placed on operators increases year by year, and in order to operate the power system reliably, skilled personnel with considerable training are required.

(Problems to be Solved by the Invention) As described above, the current situation is that power system monitoring is carried out by operators while visually confirming the power system diagram showing the open/close states of the system switching devices. However, when operators monitor a power system that has become complex and large-scale, they have to look at the open/close states of switchgear on a complex power system diagram to determine which substation is receiving power for each substation. It is not necessarily the product, and even more so that in situations where an accident occurs in the power system and urgent measures are required, it is necessary to immediately determine the power system as seen from the receiving light and take appropriate measures. It is also necessary to consider that accidents can spread over a wider area, leading to more widespread accidents.

The present invention eliminates the need for operators who monitor power systems to look at complex power system diagrams and identify the substations that receive power for each substation, and automatically determines the power supply system for each substation. By displaying the name of the power receiving substation, operators can monitor the power system without having to visually follow the connection status of the system switching equipment on the display means. It is an object of the present invention to provide a power system monitoring and control device that can easily determine the state.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the power system monitoring and control device of the present invention changes the switching status of the system switchgear installed in each of the plurality of substations making up the power system. a first storage means for storing information on a power receiving optical substation basis; A second storage means for storing power system information together with the substation name, and a closed power transmission line between a certain power receiving optical substation and a power receiving optical substation based on the stored contents of the first and second storage means. is configured, and if so, sends the name of the power receiving substation as seen from the power receiving optical substation to the second storage means as power system information and j-. means, displaying the opening/closing status of each system switchgear based on the memory content of the first memory means, and displaying a power receiving optical substation and a power receiving optical substation based on the memory content of the second memory means; The present invention is characterized in that it includes a man-machine interface device that displays the name of the power receiving substation at the power receiving optical substation when a closed power transmission line is formed between the two.

(Function) In the power system monitoring and control device having the above configuration, the power receiving substation determining means determines the power receiving substation for each substation in response to changes in the open/close status of the system switching equipment at each substation.
Since the substation name is displayed on the man-machine interface device, it is possible to accurately understand the switching status of complex and large-scale power systems without relying on operator judgment, and even in emergency situations, power system Therefore, operators can respond accurately and quickly when performing operations for power system monitoring and control.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

FIG. 1 shows an embodiment of a power system monitoring and control device according to the present invention. The power system monitoring and control device is substantially composed of an electronic computer 1. The features of the present invention are:
A power system monitoring and control device constituted by a computer 1 is provided with a means for automatically determining the name of a power receiving substation for each source substation, and storing and outputting the result of the determination to a man-machine interface device. The reason is that it has additional functions.

The computer 1 takes in switching status information of the system switching devices 5 such as circuit breakers and disconnectors via the remote monitoring and control device 4 on the slave station side and the remote monitoring and control device 3 on the master station side via I7. Electronic calculation $1
Reference numeral 11 includes a system switching equipment information storage device 40, a receiving substation determination means 50, a power supply system information storage device W60, and a display function section 45. The system switching equipment information storage device 40 stores the switching status information of the system switching equipment 5, which has been taken into the computer 1, for each power receiving optical substation. The power supply system information storage device 60 stores the name of the power receiving substation and the system switching equipment belonging thereto for each power supply system that constitutes a closed power transmission line between the power receiving substation (power transmission light) and the power receiving substation. It also stores the name of the power receiving substation determined by the power receiving substation determining means 50. The power receiving substation determination means 50 determines the name of the power receiving substation based on the stored contents of the system switchgear information storage device 40 and the power system information storage device 60. Display function section 4
5 retrieves the switching state information of the system switching equipment from the system switching equipment information storage device 40, and the power supply system information storage device 60.
The name of the power receiving substation is extracted from , and the man-machine interface device 20 is caused to display a power system diagram.

FIG. 2 shows a specific memory configuration of the power system information storage device 60. This power supply system information storage device 6° has m sets of memory areas 81, 62, . ..., I have 8m. Furthermore, in the memory area of each power supply system information, to explain the case of the memory area 61 of the first power supply system information as an example, there is a memory for storing the name of the power receiving substation determined by the power receiving substation determination means 50. an area 611, a memory area 612 that stores display destination information on where to display it on the man-machine interface device 20, and numbers 1 to g of a plurality of system switching devices used to determine the receiving optical substation. It includes a memory area 813 that stores .

A specific example of the power receiving optical substation determination performed by the power receiving destination substation determining means 50 will be described with reference to FIGS. 3 and 4. FIG. 3 shows a specific example of the system opening/closing state, and FIG. 4 is a specific example in which the contents of FIG. 2 are expressed in accordance with FIG. 3.

In FIG. 3, the A substation 100, which is a substation for receiving light (that is, transmitting light), has system switching equipment 101, 102.
, 103 , 104 are implemented, and the B substation, which needs to determine the receiving optical substation for each substation, has system switching equipment 1.21 , 122 , 123 , 124 , 1
25 have been implemented. Currently, the system switching devices 101, 102 of the A substation 100 and the system switching devices 1.21, 123, 125 of the B substation are in the "on" state, and a closed power system is configured between the two substations. , B of receiving light
The fact that the power receiving optical substation viewed from the substation 120 is the A substation 100 is indicated in the power receiving substation name display section 200 with "A substation system" 17. The * mark in the memory area indicates the position where "A substation system" is displayed.

FIG. 5 shows an example in which the system configuration of FIG. 3 is made more complicated, and the internal configurations of the power receiving light substation A 100 and the power receiving light substation B 200 are the same as those in FIG. 3. In addition, a C substation 110 is provided here as a substation for receiving light, and a substation C 130 is provided as a substation for receiving light. The C substation 110 has system switching equipment ui,
112 , 118 , 114 are installed, and the C substation 130 has system switching equipment 131 , 112 , 133
, 134 and 135 are implemented.

D substation currently has system switching equipment 1.13゜1 from C substation.
1.4, 132, 134, and 135. That the D substation is currently receiving power from the C substation is indicated by displaying on the display unit 300 of the D substation that the power receiving substation name is "C substation system."

FIG. 6 is a flowchart for explaining the operation of the power receiving destination substation determining means 50, and the operation of the power receiving destination substation determining means 50 will be explained below with reference to this flowchart.

When the opening/closing status of the system switching equipment in the system changes, the system equipment opening/closing status storage device 40 shown in FIG.
“ON” or “OFF” information is stored in the sixth
Shifting to the flow shown in the figure, the determination procedure in the power receiving substation determining means 50 is started (step 70). Next, step 71) of retrieving the stored information in the power system information storage device 60 in units of power system information shown in FIG.
Step 7: Extract the system switching equipment number from the stored information.
2) It is determined whether all the system switching devices indicated by the system switching device numbers 613 taken out from the power system information storage device 60 are in the "on" state (step 73).

Here, if all are in the "on" state, it is determined that power is being received,
Step 74 for extracting the power receiving substation name 611 in Figure 2
), a request is made to display the power receiving substation name at the display position of the man-machine interface device 20 indicated by the display destination information 812 in FIG. 2 (step 75).

If all the system switchgear included in the system switchgear number 613 are not "on" in step 73, it is determined whether the currently displayed power receiving substation name and the determined power receiving substation name are the same. (step 76). This is to determine whether the receiving optical substation has experienced a power outage due to a change in the opening/closing state of the system switching equipment, and if the receiving substation name is the same, the display destination information 61
Man-machine nine interface device 2 shown in 2
A request is made to the display position 0 to indicate that the power is out (step 77).

When the process of step 75 or step 77 is completed, it is determined whether all determinations of the power system information Bl have been completed (step 78), and if not, step 71)
The process returns to step 1 and repeats the above process again, and when it is finished, the process of the power receiving substation determining means 50 is finished.

To further explain the specific opening/closing status, first, in step 71, the system switching equipment number 613 is taken out, and in step 73, based on the opening/closing status of the system switching equipment shown in FIG. Determine whether or not there is. In the case of Fig. 3, the system switching equipment 101, 1
Since 02, 121, 123, and 125 are all "ON", the process proceeds to step 74, extracts the A substation with power receiving substation name 611 in FIG. 4, and proceeds to step 75, and displays the display destination information in FIG. "A substation system" is displayed as the name of the power receiving substation in the power receiving substation name display section 200, which is the position of the * mark 612.

In the case of FIG. 5 as well, it can be easily inferred from the above description that the power receiving substation can be determined in the same manner as described above, so detailed explanation will be omitted.

In the above, we have explained that the judgment results of the power receiving substation are displayed on the power system diagram, but when there is a change in the power receiving substation, you can also use a typewriter etc. to display the time and the power receiving substation. By printing the name of the location and the name of the power receiving substation, you can record such changes as a history.
It is possible to accurately judge past changes without looking at multiple power system diagrams, and it is also possible to know later when the name of the power receiving substation was changed. In this example, the man-machine interface device 20 is simply changed from a display device to a print output device such as a typewriter, but the essential processing content does not change.

〔Effect of the invention〕

As described above, according to the present invention, when monitoring a power system, it is possible to receive power even when the power system becomes complex and large-scale, in important work situations that require operator judgment to intervene. It is possible to easily judge the open/closed status of switching equipment in the power transmission system, reducing the burden on operators.
Opening/closing operations of system switching equipment can be performed quickly and accurately.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the power system monitoring and control device according to the present invention, FIG. 2 is a diagram showing the memory configuration of the power system information storage device in FIG. 1, and FIG. 3 is a diagram showing one configuration of the power system Figure 4 is a diagram showing an example of the power system information storage device shown in Figure 2 and the system opening/closing state shown in Figure 3. 6 is a flowchart showing the processing procedure of the receiving substation determination means in FIG. 14; FIG. 7 is a diagram showing an example of a general power system; FIG.
The figure is a block diagram of a conventional power system monitoring and control device. 1... Electronic computer, 3.4... Remote monitoring control device,
5... System switching equipment, 20... Man-machine interface device, 40... System switching equipment information storage device, 45... Display function section, 50... Power receiving substation determination means, 60. ...Power system information storage device.

Claims (1)

[Claims] a first storage means for storing the opening/closing state of the system switching equipment provided in each of the plurality of substations constituting the power system for each substation, and between the power receiving substation and the power receiving source substation; a second storage means for storing a group of system switching equipment for configuring a closed power transmission line for each of the power receiving substations together with the name of the power receiving substation as power system information;
Based on the memory contents of the second storage means, it is determined whether a closed power transmission line is configured between a certain power receiving substation and a power receiving substation, and if a closed power transmission line is formed, the power receiving substation power receiving substation determination means for transmitting a power receiving substation name as seen from the power supply system information to the second storage means; and a switching state of each system switching device based on the stored content of the first storage means. At the same time, when a closed power transmission line is configured between a certain power receiving substation and a power receiving substation based on the memory contents of the second storage means, the power receiving substation is connected to the power receiving substation. An electric power system monitoring and control device equipped with a man-machine interface device that displays location names.