TWI812370B - Real-time display device and method for the operation state of a power grid feeder - Google Patents

Abstract

Disclosed is a real-time display device and method for the operation state of a power grid feeder, comprising a switching operation monitoring unit, a connectivity analysis and computing unit, and a switching operation queuing unit. The switching operation monitoring unit monitors and captures line operation information. The switch movement information in the line operation information will be stored in the switching operation queuing unit. The connectivity analysis and computing unit can retrieve the feeder structure information from the distribution map database, and calculate the changes in the power supply and power outage area caused by the switch movement information, which is equivalent to the power supply symbol of the feeder node. According to the power supply, the distribution and transmission direction of the symbols on the feeder line determine the corresponding visualization effect. Finally, combined with the geospatial information of the geographic map system, the real-time visualization of the operation status of the power grid feeder is completed.

Description

Device and method for real-time display of power grid feeder operating status

The invention relates to a real-time display device and method for the operating status of a power grid feeder.

In order to cooperate with the development of national energy development policies, according to the smart grid master plan, the field of grid system integration is divided into seven important aspects, including "smart dispatching and power generation" and "grid management", "energy storage system", "information "Communication Infrastructure", "Demand Side Management", "Regulations and Systems" and "Industrial Development".

Among them, the Advanced Metering Infrastructure (AMI) in "Demand Side Management" is planned and constructed by Taiwan Electric Power Company. It mainly consists of smart meters, communication systems (including communication networks) and meter data management systems. In addition to recording users' electricity consumption and regularly transmitting meter data, it can also replace manual meter reading.

In addition, the power grid management aspect focuses on enhancing the automation, informatization and self-healing capabilities of the transmission and distribution grid, improving the resilience of the grid and increasing the reliability of power supply. Specific methods include continuing the feeder automation improvement plan and integrating power distribution system information. Map information, smart meter information, feeder information, etc., to strengthen the application and promotion of feeder automation system data and implement a rapid power restoration system, which shows that through the integration of power grid operation information and distribution map information, the resilience of the grid and the reliability of power supply are improved, which is the development of current national policies. direction.

However, in the traditional approach, dispatchers mainly rely on the feeder monitoring system to understand the operating status of the feeder or the scope of the fault area. However, this system generally only understands the operating status of some equipment (such as automatic switches), and only presents a simplified structure of the feeder, lacking its geographical space. , complete equipment and user information, making it difficult for dispatchers to clearly grasp the current normal power supply area of feeders or the scope of power outage. If relevant information is needed, they must separately consult the map information system or the power outage operation system to confirm the distribution of feeders, which is not conducive to shortening the power outage. Incident handling time and follow-up personnel dispatch.

In addition, some companies or researchers have proposed various solutions for power grid management. From the perspective of patent documents, for example: Taiwan Invention Patent No. I303718 (Invention title: Data visualization system and method for real-time monitoring of lightning strikes in power networks ), which provides lightning strike data, including lightning strike intensity, multiplicity, and polarity, etc., which are visually designed. At the same time, combined with the geographical information of the transmission system, this lightning strike information is integrated with the lightning strike time and location to present the lightning strike dynamics from a system-wide perspective. process of change. This allows system operators to quickly understand the lightning strike status intuitively and decide on appropriate warning measures early to avoid lightning accidents or reduce the impact of lightning accidents. However, this previous patent case focused on the presentation of lightning monitoring data on distribution networks rather than confirming the distribution of feeders.

Or Taiwan's new patent No. M527582 (power equipment map information system). This new patent mentions that when the server unit receives the data query request, the server unit will combine the geographical data, the equipment icon data and the equipment attributes. The data is sent to the first electronic device. When the first electronic device receives the geographical data, the equipment icon data and the equipment attribute data, the first electronic device displays the geographical data, the equipment icon data and the equipment attribute data. This previous patent case focuses on using an electronic device to query the server for geographical data and attributes of electrical equipment.

Furthermore, U.S. Patent No. 10877954 (patent name: System and methods for syncing and merging network changes to a distribution network), the technical background mentioned in the company Utility companies provide customers with services such as electricity, gas, water, telecommunications, and cable TV. All these services require a distribution network in the service area. As used herein, a distribution network includes pipes, cables, and/or other equipment to facilitate the distribution of utilities to customers. For example, distribution lines consisting of cables/overhead lines and substations help distribute power from the transmission/sub-transmission network to customers. Data representing electrical distribution facilities (e.g., poles, conductors, transformers, switches, and protective devices used in distribution facilities) are stored in a facility database, typically with geospatial attributes (i.e., geographic information system or GIS). Distribution circuits can then be edited, analyzed and visualized using a variety of software applications. These applications often work directly against GIS database models and require queries and calculations to be performed in GIS, which can lead to performance issues (e.g., longer processing times and slow responses). From the above, it can be seen that this patent discusses how to integrate and synchronize changes or modifications to distribution network status from other systems or platforms back to GIS for merging, and does not mention confirming the distribution of feeders.

According to the above, the existing technology does not provide an effective technical solution to quickly confirm the distribution of feeders. Therefore, in order to allow dispatchers to instantly grasp the current normal power supply area of feeders or the scope of power outage, and quickly confirm the distribution of feeders, in order to In order to shorten the processing time of power outage accidents and subsequent personnel dispatch, it is necessary to improve this problem.

In view of the problems of the prior art, the purpose of the present invention is to combine geospatial information and real-time feeder operating status, and display the information through visual feed distribution, so that the geospatial information of power supply and power outage range can be grasped by dispatchers, and can also be used by dispatchers. Provide complete equipment and user information for reference; and visualize the feed distribution display information when calculating the geographical spatial range affected by each switch action in the feeder network. At the same time, a voltage check mechanism is added to check the effectiveness of the action before proceeding. Computational and geospatial state changes Presentation to ensure the accuracy of information display, thereby effectively accelerating power outage restoration incident handling and dispatch efficiency.

According to the purpose of the present invention, a real-time display device for the operating status of a power grid feeder is provided. The present invention is an instant display device for the operating status of a power grid feeder and a method thereof, including a switching action monitoring unit, a connectivity analysis calculation unit, and a switching action queuing unit, wherein The switch action monitoring unit monitors and captures line operation information, and the switch action information in the line operation information is stored in the switch action queue unit. The connectivity analysis calculation unit can retrieve the feeder structure information from the power distribution map database, and calculate the changes in the power supply and power outage areas caused by the switch change information, which is equivalent to the power supply symbol of the feeder node, and calculates the power supply according to the power supply The distribution and transmission direction of the symbols on the feeder lines (also referred to as "feeders") determine the corresponding visualization effect. Finally, combined with the geospatial information of the geographical mapping system, a real-time visualization of the operating status of the power grid feeder is completed.

Among them, the switching action monitoring unit is connected to the power distribution system to receive the current line operation information of the distribution network. The switching action monitoring unit pre-stores the switching status information of the normal status of each feeder node of the distribution network. The switching action monitoring unit compares Line operation information and switch status information, and compare the current switch status of each feeder node in the line operation information to determine whether there is any inconsistency with the switch status information of the normal status of each feeder node, and generate an output for feeder nodes with inconsistent switch status Switch change information.

Among them, after the switch action monitoring unit completes the processing of all feeder lines on the distribution network being in a normal state, once it is found that any feeder node on the line is not in its normal state (for example, a normally open switch is closed, a normally closed switch is open ), then add the switch action information of these feeder nodes to the switch action queue unit. The reason for using the switch action queue unit is to take into account the computing time required for status judgment and transmission on the line, and each feeder node action must be processed sequentially according to its action sequence, so it is necessary The switching action queue unit is used for sorting. On the contrary, when the switching action monitoring unit completes the processing of all feeder lines on the distribution network being in a normal state, and no feeder node is not in its normal state, the switching action monitoring unit continues to All feeder lines are monitored. Among them, each feeder node is used to check whether the voltage or current is within a normal and reasonable range to confirm whether it is in a normal state.

Among them, the connectivity analysis calculation unit retrieves all the switching equipment belonging to each feeder line from the power distribution map database. For example, find out the source circuit breaker of the feeder line, which is the starting point equipment of the feeder line, and then self-feed in sequence. From the starting point of the electric line to the downstream direction, find each switch device, express the connection relationship of each switch device with a graphical structure, use each switch device as a feeder node, and use the wires connected between switch devices as connecting line segments until the end, where, The initial color of each node and connecting line segment comes from the color attribute of the feeder to which it belongs in the power distribution map database. The feeder nodes, connecting line segments, and contact switches are all spatial information objects, and the initial state of each feeder node is marked (for example: a normally closed switch is marked as ON, a normally open switch is marked as OFF), and each feeder line is marked with All feeder nodes on the road are marked with the power supply symbol and power supply directionality of the connecting line segment to which they belong. In addition, the status of each node will affect its visual presentation characteristics such as color (determined by the power supply symbol) and direction indication (determined by the symbol transmission direction).

According to the purpose of the present invention, a method for real-time display of power grid feeder operating status is provided, which includes a switching action monitoring unit, a connectivity analysis calculation unit, and a switching action queuing unit. The switching action monitoring unit monitors and acquires line operation information, and line operation information. The switch action information in will be stored in the switch action queue unit. The connectivity analysis calculation unit can retrieve the feeder structure information from the power distribution map database, and calculate the changes in the power supply and power outage areas caused by the switch change information, which is equivalent to the power supply symbol of the feeder node, and calculates the power supply according to the power supply The distribution and transmission direction of the symbols on the feeder lines determine the corresponding visualization effect. Finally, combined with the geospatial information of the geographic map system, a real-time visualization of the operating status of the power grid feeder is completed.

According to the above, the present invention combines geospatial information to perform real-time presentation of feeder operating status, retrieves feeder architecture information from the power distribution map database to establish a graphical structure, and simulates the changes and judgments of power supply and power outage ranges caused by switching actions as The changes in node status and the transmission process of power supply symbols on the graphical structure, and after each transfer is completed, the visual effect is determined based on the distribution and transmission direction of the power supply symbols, and the real-time operation status of the feeder is obtained through the geographical information system combined with spatial information. Presentation enables dispatchers to grasp the geospatial information of power supply and power outage ranges, and also provides complete equipment and user information for reference. At the same time, a voltage check mechanism is also added when calculating the geospatial range affected by each switch action. Check the validity of the action before performing calculations and displaying changes in geospatial status to ensure the accuracy of information display; it can effectively speed up power outage restoration incident handling and dispatch efficiency.

1: Switch action monitoring unit

2: Switch action queue unit

3: Connectivity analysis calculation unit

4: Equivalent operation graph

5: Visualize the picture

A, B, D, E, F: feeder nodes

C: contact switch

X, Y: Feeder line

Figure 1 is a schematic diagram of the architecture of the present invention.

Figure 2 is a schematic diagram of equivalent operation graphics of the present invention.

Figure 3 is a schematic diagram of a visual screen of the present invention.

Figure 4 is a schematic flow chart of the method of the present invention.

FIG. 5 is a schematic flowchart of generating switch status information according to the present invention.

Figure 6 is a schematic flowchart of the present invention for presenting visual images.

FIG. 7 is a schematic diagram of equivalent operation graphics according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of a visual screen according to an embodiment of the present invention.

Figures 9(a)~9(c) are schematic diagrams of six connection states of the present invention.

FIG. 10 is a schematic diagram of an equivalent operation diagram of sequence 1 of the switching action scenario in one embodiment of the present invention.

FIG. 11 is a schematic visual diagram of sequence 1 of the switching action scenario in one embodiment of the present invention.

FIG. 12 is a schematic diagram of an equivalent operation diagram of sequence 2 of the switching action scenario in one embodiment of the present invention.

FIG. 13 is a schematic visual diagram of sequence 2 of the switch action scenario in one embodiment of the present invention.

FIG. 14 is a schematic diagram of an equivalent operation diagram of sequence 3 of the switching action scenario in one embodiment of the present invention.

FIG. 15 is a schematic visual diagram of sequence 3 of the switching action scenario in one embodiment of the present invention.

FIG. 16 is a schematic diagram of the equivalent operation diagram of sequence 4 of the switching action scenario in one embodiment of the present invention.

FIG. 17 is a schematic visual diagram of sequence 4 of the switch action scenario in one embodiment of the present invention.

FIG. 18 is a schematic diagram of an equivalent operation diagram of sequence 5 of the switching action scenario in one embodiment of the present invention.

FIG. 19 is a schematic visual diagram of sequence 5 of the switching action scenario in one embodiment of the present invention.

FIG. 20 is a schematic diagram of the equivalent operation diagram of sequence 6 of the switching action scenario in one embodiment of the present invention.

FIG. 21 is a schematic visual diagram of sequence 6 of the switching action scenario in one embodiment of the present invention.

FIG. 22 is a schematic diagram of the equivalent operation diagram of sequence 7 of the switching action scenario in one embodiment of the present invention.

FIG. 23 is a schematic visual diagram of sequence 7 of the switching action scenario in one embodiment of the present invention.

FIG. 24 is a schematic diagram of the equivalent operation diagram of sequence 8 of the switching action scenario in one embodiment of the present invention.

FIG. 25 is a schematic diagram of a visual diagram of sequence 8 of the switching action scenario in one embodiment of the present invention.

Figure 26 is a flow chart of system initialization and switch action monitoring in one embodiment of the present invention.

FIG. 27 is a flow chart for analyzing and determining the impact of switch actions in an embodiment of the present invention.

In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, the present invention can be used in many other ways than those described here. Those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

It should be noted that when an element is referred to as being "mounted" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present invention are for illustrative purposes only and do not represent the only implementation. Way.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plural" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In the present invention, unless otherwise expressly stipulated and limited, the first feature "above" or "below" the second feature may mean that the first feature directly contacts the second feature, or the first feature and the second feature indirectly contact each other. Contact through intermediaries. Moreover, the terms “above”, “above” and “above” the first feature of the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the level of the first feature is higher than that of the second feature. "Above", "above" and "above" the first feature on the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

Unless otherwise defined, all technical and scientific terms used in the description of the present invention have the same meanings as commonly understood by those skilled in the technical field of the present invention. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to Figure 1. The present invention is a real-time display device for the operating status of a power grid feeder. It includes a switching action monitoring unit 1, a connectivity analysis calculation unit 3, and a switching action queue unit 2. The switching action monitoring unit 1 monitors and captures Line operation information, the switch change information in the line operation information will be stored in the switch action queue unit 2. The connectivity analysis calculation unit 3 can retrieve the feeder structure information from the power distribution map database, and calculate the changes in the power supply and power outage areas caused by the switch change information, which is equivalent to the power supply symbol of the feeder node, and based on The distribution and transmission direction of power supply symbols on the feeder lines form an equivalent calculation graph 4 (as shown in Figure 2 or Figure 3). Finally, the geographical map information system is combined with the geospatial information and equivalent calculation results to present the operating status of the power grid feeder. The real-time visualization screen 5 (Figure 2 or Figure 3).

In the present invention, the switching action monitoring unit 1 is connected to the distribution line to receive the current line operation information of the distribution line. The switching action monitoring unit 1 pre-stores the switching status information of the normal status of each feeder node of the distribution line. The switching action monitoring unit 1 compares the line operation information and the switch status information, and compares the current switch status of each feeder node in the line operation information with the switch status information of each feeder node's normal status, and determines whether there is any inconsistency. The switch status of the feeder node generates switch change information.

In the present invention, after the switching action monitoring unit 1 completes the processing of all feeder lines on the distribution network being in a normal state, once it is found that any feeder node on the line is not in its normal state (for example, the normally open switch is closed, If the switch is turned off but turned on), the switch change information of these feeder nodes is added to the switch action queue unit 2. The use of switch action queue unit 2 takes into account the computing time required for status judgment and transmission on the line, and each feeder node action must be processed in sequence according to its action sequence. Therefore, the switching action queue unit 2 needs to be used for sorting. On the contrary, when the switching action monitoring unit 1 completes the processing of all feeder lines on the distribution network being in a normal state, there is no feeder node that is not in its normal state, then The switching action monitoring unit 1 continuously monitors all feeder lines. Among them, each feeder node is used to check whether the voltage or current is within a normal and reasonable range to confirm whether it is in a normal state. Specifically, checking the voltage or current is performed by the connectivity analysis computing unit. When the on-site switch status changes, the switch action monitoring unit receives the signal and stores the abnormal information in the queue, and then the connectivity analysis computing unit checks The rationality of voltage or current will produce the results of power supply direction and feeder color.

In the present invention, the connectivity analysis calculation unit 3 retrieves all the switching equipment belonging to each feeder line from the power distribution map database. For example, find out the source circuit breaker of the feeder line, which is the starting point equipment of the feeder line. Find each switch device in sequence from the starting point of the feeder line to the downstream direction, express the connection relationship of each switch device with a graphical structure, and use each switch device as a feeder node and the contact switch between the two feeder lines. The feeder node The feeder lines at both ends of the tie switch are connecting line segments until the end. The feeder nodes, connecting line segments, and tie switches are all spatial information objects, and the initial state of each feeder node is marked (for example, the normally closed switch is marked as ON, the normally open switch is marked OFF), and all feeder nodes on each feeder line are marked with the power supply symbol and power supply directionality of their connecting line segments. In addition, the status of each feeder node will affect its visual presentation characteristics such as color (determined by the power supply symbol) and direction indication (determined by the symbol transmission direction).

In the present invention, the definition of power supply symbols and directivity for visual display according to the following rules is as follows:

(1) There is no power supply symbol on the feeder node: it indicates a power outage. The connecting line segment is shown in the color representative of the power outage (such as black), and the direction is not marked.

(2) The feeder node has only one power supply symbol and transmission direction: it means that it is powered by a single feeder line. The connecting line segment is displayed as the line color representing the power supply symbol, and the direction of the line segment is marked according to the transmission direction.

(3) There are more than two power supply symbols on the feeder node, but the transmission directions corresponding to each power supply symbol are the same: it means that the line currently forms a loop (short) circuit state by more than two connecting line segments, and power is supplied by more than two connecting line segments. And the directionality is consistent, so it is displayed as a color representing a circular (short) path, and the direction of the line segment is marked according to the direction of transmission.

(4) There are more than two power supply symbols on the feeder node, but the transmission directions corresponding to each power supply symbol are inconsistent: it means that the line currently forms a loop (short) circuit state by more than two connecting line segments, and the power is supplied by more than two connecting line segments. The directionality is inconsistent, so it is displayed as a color representing a circular (short) path, and the direction of the line segment is marked as an unconfirmable pattern or its directionality is not marked.

(5) When the feeder node status is OFF, the feeder node icon is marked with the OFF color.

(6) When the feeder node status is ON, it will appear as the color of the line segments adjacent to the left and right of the feeder node.

Please refer to Figure 4. The present invention is a method for real-time display of power grid feeder operating status, which includes the following steps: (S101) Switching action monitoring unit 1 monitors all feeder lines on the distribution network and generates line operating information; (S102) Switching action The monitoring unit 1 confirms whether there is switch abnormality information from the line operation information. When it is confirmed that there is switch abnormality information, the switch abnormality information is stored in the switch action queue unit 2. Otherwise, continue with steps (S101); (S103) connectivity analysis. The computing unit 3 can retrieve the feeder structure information from the power distribution map database, and calculate the changes in the power supply and power outage areas caused by the switch abnormality information, which is equivalent to It is the power supply symbol of the feeder node, and determines the corresponding visual effect based on the distribution and transmission direction of the power supply symbol on the feeder line. Finally, the geographical map system is combined with geospatial information and equivalent calculation results to present the operation of the power grid feeder. Real-time visualization of status.

In the present invention, please refer to Figure 5. The switching action monitoring unit 1 generates switching status information according to the following steps, including: (S201) The switching action monitoring unit 1 is connected to the distribution line to receive the current current situation of the distribution line. line operation information; (S202) the switch action monitoring unit 1 pre-stores the switch status information of the normal status of each feeder node of the distribution network; (S203) the switch action monitoring unit 1 compares the line operation information and the switch status information, and The current switching status of each feeder node in the operation information is compared to determine whether there is any inconsistency with the switching status information of the normal status of each feeder node, and switch abnormality information is generated for feeder nodes with inconsistent switching status.

In the present invention, please refer to Figure 6. The connectivity analysis calculation unit 3 presents a visual image according to the following steps, including the following steps: (S301) Extract all the belongings of each feeder line from the power distribution map database. Switching equipment, and find the switching equipment at the source of the feeder line, and find all the switchgear in sequence from the starting point of the feeder line to the downstream direction; (S302) Express the connection relationship of each switchgear with a graphical structure, and use each switchgear to As a feeder node, the wires connected between switchgear are used as connecting line segments until the end; (S303) Each feeder node, connecting line segment and contact switch are all spatial information objects, and the initial state of each feeder node is marked, and is All feeder nodes on each feeder line are marked with their The power supply symbol and power supply directionality of the connecting line segment. In addition, the status of each feeder node will affect its visual presentation characteristics such as color (determined by the power supply symbol) and direction indication (determined by the symbol transmission direction).

In order for people to further understand the technical features of the present invention, the following examples are provided:

In this embodiment, the equivalent calculation graphics of the equivalent calculation space information objects of the distribution network's feeder nodes, contact switches and connecting line segments are shown in Figure 7, and the corresponding visual images on the geographical space are shown in Figure 8. The distribution network consists of two feed lines X and Y. Feed line X has feed switches A and B; feed line Y has feed switches D, E, and F; the representative color of feed line X is blue. The representative color of feeder line Y is orange, and the two feeder lines are connected through a normally open contact switch C (marked with a ★ and a red mark).

On the equivalent operation graph, the switch with a "solid line" in the outer frame is turned on (ON), and the switch with a "dashed line" in the outer frame is closed (OFF); on the corresponding visualization screen, the feeder node is a normally closed switch. Gray and black represent OFF, and colors represent ON. If the feeder node is a normally open switch, red represents OFF, and other colors represent ON. All switches of the two feeder lines are in their normal state at the beginning, and the initial power supply symbols (X, Y) and directional markings have been completed on the visual screen.

In addition, please refer to Figures 9(a) to 9(c). The connection line segment connected to the feeder node or the tie switch will have the following six connection states. The first connection state (left side of Figure 9(a) The feeder node in the second connection state (right picture of Figure 9(a)) is in the closed state (on), the power supply symbols on both sides are the same and the direction of the power supply symbols on both sides is the same. (off), there is a power supply symbol on only one side and the two power supply symbols are in the same direction. When the feeder node changes from the first connection state to the second connection state, it means that the measured voltage value downstream of the feeder node is zero and the conduction current value of the feeder node is zero. On the equivalent calculation graph, the downstream side The power supply symbol makes the power supply symbol on the downstream side disappear on the visualization screen (that is, the second connection state). When the feeder node transitions from the second connection state to the first connection state, it means that the feeder node The measured voltage value downstream of the line node is not zero, the switch conduction current value is not zero, and each power supply symbol and visual image on the downstream side of the equivalent operation graph are transformed into the first connection state.

The feeder node (contact switch) in the third connection state (left picture of Figure 9(b)) is in the open state (on). The power supply symbols on both sides are the same and the directions of the power supply symbols on both sides are inconsistent. The fourth connection state ( As shown in the right picture of Figure 9(b)), the feeder node (tie switch) is in a closed state (off), with only power supply symbols on both sides and both power supply symbols point to the feeder node. When the feeder node changes from the third connection state to the fourth connection state, it means that the measured voltage value downstream of the feeder node is not zero, and the conduction current value of the feeder node is zero. The downstream side is removed from the equivalent operation graph. For each power supply symbol, the power supply symbol on the upstream side points to the feeder node on the visual screen (that is, the fourth connection state). When the feeder node changes from the fourth connection state to the third connection state, it means that the voltage value on both sides of the feeder node is not zero, and the power supply symbols on the equivalent operation graph are extended and transmitted to the downstream side of the feeder node, visually The screen changes to the third connection state.

The feeder node (tie switch) in the fifth connection state (left picture in Figure 9(c)) is in the open state (on), with no power supply symbols on both sides. The sixth connection state (right picture in Figure 9(c) The feeder node (tie switch) under ) is in the closed state (off), and there are no power supply symbols on both sides. When the feeder node changes from the fifth connection state to the sixth connection state, it means that the voltage value on both sides of the feeder node is zero and the conduction current value is zero. In the equivalent operation graph, only the feeder node is changed to the open state, no need to The power supply symbol is transmitted, and the power supply symbol does not change in the visual image. When the feeder node changes from the sixth connection state to the fifth connection state, it means that the voltage value on both sides of the feeder node is zero and the conduction current value is zero. In the equivalent operation graph, only the feeder node is changed to the closed state. There is no need to transmit the power supply symbol, and the power supply symbol does not change in the visualization.

The following is an explanation of the open or closed status of feeder nodes A, B, D, E, F, and contact switch C based on the order 1 to 8 in Table 1:

Order 1:

Open the feeder node A and check that the voltage and current are reasonable. As shown in Figure 10, it changes from the first connection state to the second connection state, and its downstream side (the downstream side for the power supply symbol X) is connected to the contact All power supply symbols . Feeder node A itself is in the OFF state. After this step is completed, the distribution of power supply symbols on the equivalent graph of the feeder line, the transmission direction, and the visualization effect of the geographic information system are shown in Figure 11.

Order 2:

Open the feeder node B. After the voltage and current are checked to be reasonable, as shown in Figure 12, it changes from the fifth connection state to the sixth connection state. There is no need to transfer the state, and only the feeder node B is changed to the OFF state. After this step is completed, the distribution of power supply symbols on the equivalent graph of the feeder line, the transmission direction, and the visualization effect of the geographic information system are shown in Figure 13.

Order 3:

Close the tie switch C. After checking the voltage and current, it is reasonable. According to Figure 14, it changes from the second connection state to the first connection state. Move the power supply symbol Y to the left side of the tie switch C (for the power supply symbol Y (downstream side) until the open feeder node B stops, the section (tie switch C-feeder node B) passed through is visually presented as orange representing the power supply symbol Y. The contact switch C itself is in the ON state, and the color of the line segment nodes on its left and right sides is the same, which is orange. After this step is completed, the distribution of power supply symbols on the equivalent graph of the feeder line, the transmission direction, and the visualization effect of the geographic information system are shown in Figure 15.

Order 4:

After closing the feeder node A, the voltage and current are checked to be reasonable. As shown in Figure 16, it changes from the second connection state to the first connection state, passing the power supply symbol X to the right side of the feeder node A (for the power supply symbol X Downstream side), until the opened feeder node B stops, the passed section (feeder node A-feeder node B) visually appears as blue representing the power supply symbol X. Feeder node A itself is in the ON state, and has the same color as the line segment nodes on its left and right sides, which is blue. After this step is completed, the distribution of power supply symbols on the equivalent graph of the feeder line, the transmission direction, and the visualization effect of the geographic information system are shown in Figure 17.

Order 5:

After closing the feeder node B, the voltage and current are checked to be reasonable. As shown in Figure 18, it changes from the fourth connection state to the third connection state, where:

(1) For the power supply symbol X, its upstream side is located on the left side of feeder node B, and its downstream side is located on the right side of feeder node B. Therefore, the power supply symbol

(2) For the power supply symbol Y, its upstream side is located on the right side of the feeder node B, and its downstream side is located on the left side of the feeder node B. Therefore, the power supply symbol Y is transmitted from the right side of the feeder node to the left side and the direction is marked.

(3) After the power supply symbols X and Y are transmitted and the transmission direction is marked, the distribution and transmission directionality of the power supply symbols on the equivalent figure are shown in Figure 19. For lines with power supply symbols X and Y at the same time Segments are all represented by short (loop) road representative colors (green here). For the directional part, if the directions transmitted by If the directions are consistent, the transmission direction will appear visually (such as the wire segments above and below the feeder node F).

After this step is completed, the distribution of power supply symbols on the equivalent graph of the feeder line, the transmission direction, and the visualization effect of the geographic information system are shown in Figure 19.

Order 6:

Open the feeder node F and check that the voltage and current are reasonable. As shown in Figure 20, it changes from the first connection state to the second connection state. For the power supply symbols X and Y, their upstream sides are both above the feeder node F. , the downstream side is all below the feeder node F, so after the feeder node F is opened, remove the power supply symbols X and Y below the feeder node F to the end, and the passed section will visually appear as the power outage representative color (here is black). Feeder node F is in the OFF state. After this step is completed, the distribution of power supply symbols on the equivalent graph of the feeder line, the transmission direction, and the visualization effect of the geographic information system are shown in Figure 21.

Order 7:

Open the feeder node E and check that the voltage and current are reasonable. As shown in Figure 22, it changes from the third connection state to the fourth connection state, where:

(1) For the power supply symbol

(2) For the power supply symbol Y, its upstream side is to the right of the feeder node E, and its downstream side is to the left of the feeder node E. Therefore, the feeder node E is opened, and the power supply symbol Y is pinned to the left side of the feeder node E.

(3) After completing the work of removing the power supply symbols X and Y, the line on the right side of the feeder node E only has the power supply symbol Y, and the line on the left side of the feeder node E only has the power supply symbol Blue, the directivity points to feeder node E. Feeder node E is OFF.

(4) After this step is completed, the distribution of power supply symbols, the transmission direction and the visual effect of the geographic information system on the equivalent graph of the feeder line are shown in Figure 23.

Order 8:

As shown in Figure 24, when contact switch C is turned on, it should change from the first connection state to the second connection state. However, after checking the voltage and current, it is found that there is still voltage and conduction current value on the right side of contact switch C, which is unreasonable. The inspection results are obtained, so the dispatcher is prompted for confirmation. It is confirmed that the switch is not opened correctly and is still in the closed state, so this switching action is omitted and the line status is not changed. After this step is completed, the distribution of power supply symbols on the equivalent graph of the feeder line, the transmission direction, and the visualization effect of the geographic information system are shown in Figure 25.

In addition, please refer to FIG. 26 , which is a flow chart of system initialization and switch action monitoring in one embodiment of the present invention. It should be noted here that the real-time display device for the operating status of the power grid feeder shown in Figure 1 can execute the system initialization and switching action monitoring process shown in Figure 26. The steps are described below.

First, in step S401, the equipment connectivity of all feeders is established from the feeder map in the initial state, including (1) retrieving all equipment belonging to the feeder from the database; (2) finding the feeder source circuit breaker, It is regarded as the equipment at the starting point of the feeder; (3) From the starting point of the feeder to the downstream direction, the connection relationship of the equipment is expressed in a graphical structure, where the equipment is the node and the connection is the edge. Until the end, the color of each node and edge is marked as The representative color of the feeder belongs to, and the directionality is the downstream search direction, which means the feeder is supplying power normally.

Next, in step S402, it is determined whether there are N switches on the line that are not in the normal state (normally open contact switch is closed, normally closed switch is open).

Then, in step S403, let i=1.

Next, in step S404, the non-normal switch Si is added to the queue Q to store the switch action sequence.

Then, in step S405, when i is less than or equal to N, step S406 is executed to make i+1 approach i.

Next, in step S407, the online switch action signal is continuously monitored.

Subsequently, in step S408, it is determined whether the switch SW is found to be in action. If yes, go to step S409; if not, go back to step S407.

Next, in step S409, the switch SW is added to the queue Q to store the switch action sequence, and then returns to step S407.

In addition, please refer to FIG. 27 , which is a flow chart for analyzing and determining the impact of switching actions in one embodiment of the present invention. It should be noted here that, as shown in Figure 27, the real-time display device for the operating status of the power grid feeder shown in Figure 1 can perform the process of analyzing and judging the impact of the switch action as shown in Figure 27. The steps are described below.

First, in step S501, the switching action queue Q is continuously monitored.

Next, in step S502, it is determined whether there is a switch action in queue Q that has not yet been processed. If yes, execute step S503; if not, return to step S501.

Then, in step S503, a switch action is taken out from the queue for processing.

Next, in step S504, the switch voltage and current are checked to confirm the non-switch malfunction signal.

After that, in step S505, it is checked based on the voltage and current to determine whether it is a normal operation signal. If yes, perform step S509; if not, perform step S506.

Continuing step S505, when step S509 is executed according to the judgment result, it will be determined according to the switch state table how to transmit the color and direction to the influence range, and start transmitting changes. Next, in step S510, after completing the color and direction transfer, return to step S501.

Following step S505, when step S506 is executed based on the judgment result, the tool action switch will be marked as abnormal, prompting the dispatcher to check. Thereafter, in step S507, it is determined whether the action signal is abnormal based on the inspection result. If yes, step S508 is executed and the switch action signal is omitted; if not, step S509 is executed, and then step S510 is executed as described above and then returns to step S501.

In summary, the present invention combines geospatial information to present the operating status of the feeder in real time; at the same time, when calculating the geographical spatial range affected by each switch action, a voltage check mechanism is also added to check the effectiveness of the action before calculation is performed. The presentation of changes in geospatial status ensures the accuracy of information display; it can effectively speed up power outage restoration incident handling and dispatch efficiency.

The above detailed description is a specific description of possible embodiments of the present invention. However, the foregoing embodiments are not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not depart from the technical spirit of the present invention shall be included in within the scope of the patent in this case.

1: Switch action monitoring unit

2: Switch action queue unit

3: Connectivity analysis calculation unit

Claims (6)

A real-time display device for the operating status of a power grid feeder, including: a switch action monitoring unit that monitors and captures a line operation information of a distribution network. The line operation information includes a switch abnormality information, and the distribution network The circuit includes at least one feed switch and at least one feed line; a switch action queue unit connected to the switch action monitoring unit, and the switch abnormality information will be stored in the switch action queue unit; a connectivity analysis calculation The unit is connected to the switch action queue unit, and the connectivity analysis calculation unit retrieves a feeder structure information from a power distribution map database, and calculates the changes in the power supply and power outage area caused by the switch abnormality information. , equivalently each feed switch is a feeder node and its power supply symbol, equivalently each feed line is divided into a connecting line segment, and based on the distribution and transmission direction of each power supply symbol on each connecting line segment, An equivalent calculation graph is formed, and combined with the geospatial information of the geographical map system, a real-time visualization of the operating status of the feeder lines of the distribution network is completed; when the switch action monitoring unit completes all the feeder lines on the distribution network After the normal state processing, once it is found that any feeder node on the line is not in its normal state, the switch action information of these feeder nodes will be added to the switch action queue unit. The real-time display device for power grid feeder operating status as described in claim 1, wherein the switching action monitoring unit pre-stores a switching status information of the normal status of each feeder node of the distribution network, and the switching action monitoring unit compares the line operating information with the switch status information, and compare the current switch status of each feeder node in the line operation information with the normal status of each feeder node Whether the switch status information is inconsistent, and the switch change information is generated for each feeder node with inconsistent switch status. The device for real-time display of power grid feeder operating status as described in claim 1, wherein the connectivity analysis calculation unit retrieves all switching equipment belonging to each feeder line from the power distribution map database, and expresses each of the power grid feeder lines in a graphical structure. The connection relationship of the switchgear, and each switchgear is used as the feeder node, a tie switch between the two feeder lines, and the feeder lines at both ends of the feeder node and the tie switch are connected line segments until the end , the feeder node, the connecting line segment, and the contact switch are all spatial information objects, and the initial state of each feeder node is marked, and the power supply symbol of the connecting line segment to which each feeder node belongs on each feeder line is marked. and power supply directionality. A method for real-time display of power grid feeder operating status, including the following steps: a switching action monitoring unit monitors all feeder lines on a distribution network and generates line operating information; the switching action monitoring unit confirms whether there is switch abnormality information from the line operating information , when it is confirmed that there is switch abnormality information, the switch abnormality information is stored in a switch action queue unit, otherwise, the line operation information is continued to be monitored to confirm whether there is switch abnormality information; a connectivity analysis calculation unit can automatically The feeder structure information is retrieved from the map database, and the changes in the power supply and power outage areas caused by the switch change information are calculated, which is equivalent to the power supply symbol of each feeder node, and based on the power supply symbol, the power supply on each feeder line is The distribution situation and transmission direction determine the corresponding visualization effect. Finally, it is combined with the geospatial information of a geographical mapping system to complete a real-time visualization of the operating status of the power grid feeder. The method for real-time display of power grid feeder operating status as described in claim 4, wherein the switch action monitoring unit generates the switch status information according to the following steps, including: The switching action monitoring unit is connected to the distribution line to receive the current line operation information of the distribution line; the switching action monitoring unit pre-stores the switching status information of the normal status of each feeder node of the distribution line; The switch action monitoring unit compares the line operation information with the switch status information, and compares the switch status information of each feeder node in the line operation information with the normal status of each feeder node. It is inconsistent, and the switch change information is generated for feeder nodes with inconsistent switch status. The method for real-time display of power grid feeder operating status as described in claim 4, wherein the connectivity analysis calculation unit presents a visual image according to the following steps, including the following steps: extracting each feeder line from the power distribution map database All the switching equipment belonging to it, and find out the switching equipment at the source of the feeder line, and find all the switchgear in sequence from the starting point of the feeder line to the downstream direction; express the connection relationship of each switchgear with a graphical structure, and combine each switchgear As a feeder node or a contact switch between two feeder lines, the feeder lines at both ends of the feeder node or contact switch are connecting line segments until the end; each feeder node, the connecting line segment and the contact switch are all spatial information objects , and for each feeder node mark or the initial state of the tie switch, and for each feeder node mark on each feeder line or the power supply symbol and power supply directionality of the connecting line segment to which the tie switch belongs.