JPH04340325A - Power system monitoring system - Google Patents

Abstract

PURPOSE:To make it possible for an operator to make an accurate decision by indicating the time when the power system machines should be maintained or inspected. CONSTITUTION:The power system monitoring system comprises a man-machine interface unit 1 having a display unit 11 and remote controllers 3, for detecting the magnitude of current flowing through a power system machine and the content of operation for each power system machine and transmitting the detected information to a computor 2. The computor 2 comprises a receiving/ processing means 23 for receiving and storing information fed from the remote controllers, a displaying/processing means 29 for displaying thus received information, an inputting/receiving means for taking in reference values when calculating the maintenance or inspection time based the magnitude of current and the content of operation, and means 26 for calculating the maintenance/ inspection time of machine based on the reference values.

Description

[Detailed description of the invention]

[Object of the invention]

[Industrial Application Field] The present invention relates to a computer system that centrally monitors power systems, and in particular, a power system that prompts operators to carry out maintenance and inspection management of power system equipment through man-machine interface devices and remote monitoring and control devices. It relates to a system monitoring device.

0002

[Prior Art] Many equipment such as circuit breakers, disconnectors, and other switches and protective devices are installed in power systems for the purpose of stabilizing the power system. For the purpose of more advanced automation, we are constructing a power system centralized monitoring and control system using electronic computers and remote monitoring and control equipment. By the way, with the development of power system centralized monitoring and control technology, the range of power system monitoring has expanded, and as a result, the amount of information handled by the electronic computers of the power system centralized monitoring and control system has become enormous.

[0003] When monitoring the power system while the operators handle a huge amount of information on a daily basis, the power system centralized monitoring and control system automatically monitors the power system in response to the operator's request or automatically. Monitoring information is communicated to operators. This type of general concept is disclosed in, for example, Japanese Patent Application Laid-Open No. 3-49395. The conventional system will be specifically explained below using FIGS. 6 to 13.

FIG. 6 schematically shows a power system, with reference numeral 62 representing a bus bar, 63 and 64 representing transformers, and 65, 66, 67 and 68 representing power transmission lines. FIG. 7 shows a specific example of the power transmission lines 65 and 66 shown in FIG. , 102 is the circuit breaker 1
00 protective relay device and reclosing device, 111, 11
2 Protective relay device and reclosing device for breaker 110 , 121 , 122 Protective relay and reclosing device for breaker 120 , 131 , 132 breaker 130
The protective relay device and reclosing device are shown.

FIG. 8 shows a centralized monitoring and control system for monitoring the status of the power system shown in FIGS. 6 and 7, in which 1 is a man-machine interface device for operators to monitor the power system, and 11 is a display device. , 12 is a pointing device (representing a light pen, tablet, etc.) used when making a display request, 13 is a device for inputting data (representing a keyboard, etc.), and 2 is a pointing device (representing a keyboard, etc.) used when making a display request. Electronic computer used to perform monitoring processing, 3, 4
Reference numeral 5 indicates a remote monitoring and control device that transmits the operation details of power system equipment, and 5 indicates the power system equipment to be monitored as shown in FIGS. 6 and 7.

FIG. 9 is a diagram showing the correlation between means and hardware for the operator to display the number of operations of power system equipment on the electronic computer 2 of FIG. When a request is made to display the number of operations of power system equipment using the device 1, an input processing unit 23 notifies the requested content, and an input processing means 23 is used to display the operation details of the power system equipment sent from the remote monitoring and control device and the power system equipment. reception processing means for receiving analog values such as the magnitude of the current flowing through the
25 is a received data storage area for storing the received data;
2C is a power system equipment operation determination information storage area for storing information used to determine the cause of power system equipment operation (such as the rated current of power system equipment), and 2B is the received data storage area 2.
5 and power system equipment operation determination means for determining the number of times the power system equipment operates and the cause of the operation based on the data stored in the power system equipment operation determination information storage area 2C;

Reference numeral 27 denotes a power system equipment operation data storage area for storing the number of times the power system equipment operates and causes of operation, and 24 represents a power system equipment operation data storage area for displaying the contents of the power system equipment operation data storage area 27 on the man-machine interface device 1. A power system equipment operating data display format storage area 29 that stores a display format stores the contents of the power system equipment operating data storage area 27 to the man-machine interface device 1 using data in the power system equipment operating data display format storage area 24. A display processing means for performing display is shown. FIG. 10 shows a configuration example of the received data storage area 25 of FIG. 9, which stores operating devices and operation details in the current state of each device and the order of operation of the devices.

FIG. 11 shows a configuration example of the power system equipment operating data storage area 27 in FIG. (Memorize the number of breaker operations and the number of breaker operations for each cause.) FIG. 12 shows a configuration example of the power system equipment operation data display format storage area 24 of FIG. 9, which stores information for displaying operation data for each power system equipment.

FIG. 13 shows an example of displaying operation data of a circuit breaker among power system equipment, and numeral 14 indicates the display contents of the display device 11 of the man-machine interface device 1. For convenience of explanation, a circuit breaker will be described below as an example of power system equipment. In such a system, for example, if an accident occurs in the power transmission line 65 of the power system shown in FIG.
110 operates, the remote monitoring and control devices 3 and 4 in FIG.
The operation details of the circuit breakers 100 and 110 are received. At this time, the reception processing means 23 operates, and the breaker 10
The operation contents of 0 and 110 are stored in the received data storage area 25 of the computer 2 in the configuration shown in FIG. At this time, the power system equipment operation determination means 2B operates, adds the number of times the breaker has operated, determines the cause of the breaker's operation, adds the number of times of operation for each cause, and stores it in the power system equipment operation data storage area 27 as shown in FIG. Save with the configuration shown in .

Further, when an operator uses the man-machine interface device 1 to request the display of the power system equipment operation data, the input processing means 21 operates and notifies the display processing means 29. The display processing means 29 operates based on this notification, and changes the contents of the power system equipment operation data storage area 27 according to the display format stored in the power system equipment operation data display format storage area 24 as shown in FIG.
It is displayed on the display device 11 of the man-machine interface device 1 in the format shown in FIG. This display allows the operator to recognize how often and for what reason the breaker is operating.

[0011]

[Problem to be Solved by the Invention] Generally, maintenance and inspection periods for power system equipment such as circuit breakers are determined, such as n accident trips and m normal on/off operations. , the display content displayed on the display device 11 is shown in FIG.
It is shown by the total number of operations of power system equipment and the number of operations by cause. If an operator is trying to decide whether it is time to perform maintenance inspections on power system equipment, he or she can visually follow the displayed number of times the power system equipment has been operated, and keep track of each power system equipment in his or her mind. The need to judge the necessity of maintenance and inspection is a burden on operators.

[0012] Furthermore, if the number of operations is not displayed for a long period of time or if there are a large number of power system devices, there is a possibility that the timing of maintenance and inspection of the power system devices may be incorrect. This causes malfunction of power system equipment,
In some cases, this led to more power system accidents. The present invention has been made in view of the above circumstances, and includes a display device 11.
To eliminate the burden on operators, who have to judge whether it is time to perform maintenance inspections on power system equipment based on the displayed information, and to eliminate power system accidents caused by oversight or incorrect judgment. The system is a power system monitoring device that displays the timing for maintenance and inspection of power system equipment based on operator requests and automatic notifications, clearly confirms the maintenance and inspection timing, and allows operators to make accurate decisions. is intended to provide.

[Configuration of the invention]

[Means for Solving the Problem] As shown in FIG. 1, a man-machine interface device 1 having a display device 11 and the magnitude of the current flowing through the power system equipment and the operation details are detected for each power system equipment, and the The remote monitoring and control devices 3 and 4 have the function of transmitting the magnitude of the flowing current and the operation details to the computer 2, and the magnitude of the current and the operation details for each of the power system equipment.
Reception processing means 23 that receives and stores operation details from the remote monitoring and control devices 3 and 4, and display processing means 2 that displays the stored operation details and the magnitude of the current flowing through the power system equipment.
9, when calculating the maintenance inspection timing of power system equipment based on the magnitude of current and operation details, the reference current deviation time is determined for each power system equipment, and maintenance is performed according to the deviation time. The system is configured to update the inspection timing sequentially and display it in advance.

[Operation] Based on the operation details of each power system device received by the reception processing means 23 and the magnitude of the current flowing through the device, the input processing means 21 calculates the maintenance inspection timing of the power system device. Based on the standard value,
The power system equipment inspection timing calculating means 26 recalculates the maintenance and inspection timing of the power system equipment, calculates the optimal maintenance and inspection timing under the current situation, and displays the calculated maintenance and inspection timing on the display processing means 29. make a request. The display processing means 29 displays the display device 11 at the requested maintenance inspection time.
will be displayed. This process enables the operator to recognize the maintenance and inspection timing for each power system device.

[0015]

[Embodiment] An embodiment will be described below with reference to the drawings. Figure 1
1 is a configuration diagram of an embodiment of a power monitoring and control device according to the present invention. The configuration of the present invention will be explained using FIGS. 1, 3, 4, and 5. FIG. 1 shows a power system monitoring device that monitors a power system according to the configuration of the present invention. 11 is a display device; 12 and 13 are a pointing device and a keyboard used for inputting constants and requesting display of the maintenance and inspection timing of power system equipment; 1 is the display device; 11, a man-machine interface device having a pointing device 12 and a keyboard 13; 2, a computer that performs processing using the operation contents of the power system equipment 5 taken in through the remote monitoring and control devices 3, 4; 3, 4, power system equipment A remote monitoring control device 21 transmits the operation contents of 5, and 21 is a remote monitoring and control device for inputting constants for calculating the maintenance inspection timing of power system equipment 5 by an operator using the display device 11, pointing device 12, and keyboard 13 of the man-machine interface device 1. At the time of request, constants for calculating maintenance and inspection timing are stored in constant storage area 2 for calculating power system equipment inspection timing.
input processing means for storing information in the display processing means 29 and notifying the display processing means 29 when requesting to display the maintenance and inspection timing of power system equipment;

A receiving process 23 receives the operation details of the power system equipment 5 sent from the remote monitoring and control devices 3 and 4, stores it in the received data storage area 25, and notifies the power system equipment inspection timing calculation means 26. Means 26 is power system equipment inspection timing calculation means for performing the process shown in the flowchart in FIG. 2 using the information stored in the received data storage area 25 and the power system equipment inspection timing calculation constant storage area 22; 2A is a display changeover switch used to specify which of the power system equipment inspection timing storage area 28 and the received data storage area 25 is to be displayed on the display processing means 29;
29 stores information stored in the received data storage area 25 or the power system equipment inspection timing storage area 28 according to the switching state of the display changeover switch 2A based on the notification from the power system equipment inspection timing calculation means 26 or the input processing means 21.
A display processing means for displaying on the display device 11 using the display format data in the power system equipment data display format storage area 24 is shown.

FIG. 3 shows the configuration of the constant storage area 22 for calculating power system equipment inspection timing shown in FIG. 1, and will be explained using a circuit breaker as an example. The details include the inspection period (t) between the maintenance and inspection of the circuit breaker and the next maintenance inspection, and the number of days (β
), the reference time (α) that shortens the period until the next inspection when a current exceeding the reference current flows through the breaker, the reference current is calculated from the rated current, for example, and the reference current = rated current × k (k < The constant k when calculating according to the formula in 1) (here, rated current means trip current in the case of a circuit breaker), and the number of days from the inspection date when the alarm should be displayed. The standard number of days (γ) is memorized. FIG. 4 shows the configuration of the power system equipment inspection timing storage area 28 of FIG. 1, and will be explained using a circuit breaker as an example. The contents include the inspection date of each breaker, the number of breaker operations, the number of breaker operations for each cause, and the time when the reference current was exceeded.

Next, the operation will be explained. For convenience of explanation, a circuit breaker will be used as an example of power system equipment. When an accident occurs in the power transmission line 65 shown in the specific example of the power system in FIG. 25, the breaker 110
Save your trip. At this time, the power system equipment inspection timing calculation means 26 operates, and uses the information stored in the power system equipment inspection timing calculation constant storage area 22 and the received data storage area 25 to calculate the maintenance and inspection status of the breaker. Process the calculation as follows.

As shown in FIG. 2, in step S-1, constants for calculating power system equipment inspection timing and received data are retrieved from the constant storage area 22 and the received data storage area 25 for calculating power system equipment inspection timing. Step S-2 determines whether the current flowing through the breaker exceeds the reference current based on the constants and data taken out in step S-1, and if the current flowing through the breaker exceeds the reference current, Proceed to step S-3, and if it has not been exceeded, step S-4
Branch to. Step S-3 calculates the number of days until the next inspection date by subtracting the number of days calculated by multiplying the time during which the rated current exceeded the rated current by a constant from the number of days until the next inspection date. Step S-4 is a process of determining whether or not a circuit breaker has operated according to the cause. If the circuit breaker has operated, the process proceeds to step S-5; if the circuit breaker has not operated, the process branches to step S-6.

In step S-5, the constant for each cause is subtracted from the number of days until the next inspection date to calculate the new number of days until the next inspection date. Step S-6 is a process of determining whether the next inspection date is within the range of days indicated by the constant. If the next inspection date is within the range of days indicated by the constant, proceed to step S-7. Proceed, and if it is not within the range, end the process. Step S-7 is the display processing means 29
requests alarm display. In order to perform the above processing, when the breaker trips, the next inspection date is calculated.

The display processing means 29 stores information in the power system equipment inspection timing storage area 28 and the received data storage area 25 when a display request is made from the power system equipment inspection timing calculation means 26 or when a display request is made from the input processing means 21. information is displayed on the display device 11 using data in the power system equipment data display format storage area 27. Figure 5
is an example of a display, and if a breaker whose maintenance inspection time falls within the reference date is displayed with a red flicker, the breaker can be easily recognized.

[0022]

[Effects of the Invention] As explained above, according to the present invention, an operator can display the maintenance and inspection timing on the maintenance and inspection timing display device of power system equipment using the man-machine interface device. You can easily recognize if it is approaching. For this reason, when trying to determine whether it is time to perform maintenance and inspection on power system equipment, you may have to visually follow the number of times the power system equipment has been operated, which is displayed in the conventional way, and mentally perform the maintenance and inspection. There is no need to judge the necessity, and there is no need for any work that is a burden on the operator. In addition, even if the number of operations is not displayed for a long time or the number of power system devices is very large, automatic emergency and emphasized emergency (color change, flicker display) will prevent mistakes in the timing of maintenance and inspection. Malfunctions of power system equipment due to omissions in inspection can be prevented.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the overall configuration of the present invention, means for calculating maintenance and inspection dates for power system equipment, and correlations between data and the like.

FIG. 2 is a flowchart for calculating maintenance inspection dates for power system equipment according to the present invention.

FIG. 3 is a diagram illustrating a configuration example of a constant storage area for calculating power system equipment inspection timing.

FIG. 4 is a diagram illustrating a configuration example of a power system equipment inspection timing storage area.

FIG. 5 is a diagram showing a display example of the results of calculating maintenance and inspection dates for power system equipment according to the present invention.

FIG. 6 is a diagram showing an example of a power system.

FIG. 7 is a specific example of equipment that makes up the power system.

FIG. 8 is a configuration example of a power system monitoring system for monitoring a power system.

FIG. 9 is a diagram showing the correlation between means for displaying the operating status of conventional power system equipment, data, etc.

[Figure 10],

[Figure 11],

FIG. 12 shows an example of the structure of data used in conventional processing.

FIG. 13 is a diagram showing an example of displaying the operating state of a circuit breaker among power system equipment.

[Explanation of symbols]

1 Man-machine interface device 2 Electronic computer 2A Display changeover switch 3 Remote monitoring and control device (parent facing device) 4 Remote monitoring and control device (slave facing device) 5 Power system equipment 11 Display device 12 Pointing device 13 Keyboard 21 Input processing means 22 Constant storage area 23 for calculating power system equipment inspection timing
Reception processing means 24 Power system equipment data display format storage area 25 Received data storage area 26 Power system equipment inspection timing calculation means 27 Power system equipment operation data storage area 28 Power system equipment inspection timing storage area 29 Display processing means

Claims (1)

[Claims] Claim 1: A man-machine interface device having a display device and power system equipment that detects the magnitude of the current flowing through the power system equipment and the operation details of that equipment for each power system equipment, and detects the magnitude of the current flowing through the equipment and the operation content of the equipment. a remote monitoring and control device having a function of transmitting the current to a computer; a means for storing the magnitude of current and operation details for each of the power system devices; and means for storing the stored magnitude of current flowing through the power system devices and operation details. In a power system monitoring device equipped with an electronic computer having display means, a reference current deviation time is determined for each power system device based on the stored current magnitude and operation details, and maintenance is performed according to the reference current deviation time. A power system monitoring device characterized by sequentially updating and displaying inspection timing in advance.