Electrical control system and electrical control method of power distribution network

Abstract

The embodiment of the invention discloses an electrical control system and an electrical control method of a power distribution network. A circuit breaker is arranged at each regional power grid node of the power distribution network; the electrical control system comprises a data acquisition module, a central processing unit and a protection action module, the data acquisition module is used for acquiring electrical data and temperature data at each regional power grid node and opening and closing state data of a corresponding circuit breaker; the central processor is electrically connected with the data acquisition module and the protection action module, and the central processor is used for generating power supply and outage control signals corresponding to the regional power grid nodes according to the electrical data and the temperature data of the regional power grid nodes and the opening and closing state data of the corresponding circuit breakers; and the protection action module is used for controlling the opening and closing operation of the corresponding circuit breakers according to the power supply and outage control signals corresponding to the regional power grid nodes. According to the electrical control system, good monitoring and control of the power distribution network are realized, and the automation level and the intelligent level of the power distribution network are comprehensively improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of automatic power distribution network, and in particular to an electrical control system and an electrical control method of a power distribution network. Background Art

[0002] With the development of power systems, traditional distributed power systems can no longer meet the requirements of modern society for power reliability and efficiency. The introduction of active distribution networks can effectively improve the reliability, stability and economy of power systems and achieve optimal scheduling and management of power resources.

[0003] However, in the existing power system, the monitoring and control of electrical data such as voltage and current of the distribution network is extremely important. How to effectively monitor and warn electrical data such as voltage and current of the distribution network and implement protection measures for the distribution network is an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present invention provide an electrical control system and an electrical control method for a distribution network, which can effectively monitor and control the distribution network, comprehensively improve the automation and intelligence level of the distribution network, and ensure the safe and reliable operation of the distribution network.

[0005] In a first aspect, an embodiment of the present invention provides an electrical control system for a distribution network, the distribution network comprising a plurality of regional grid nodes, and a circuit breaker is provided at each of the regional grid nodes;

[0006] The electrical control system includes a data acquisition module, a central processing unit and a protection action module;

[0007] The data acquisition module is used to collect electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node;

[0008] The central processor is electrically connected to the data acquisition module and the protection action module respectively, and is used to generate a power supply and power failure control signal corresponding to each of the regional power grid nodes according to the electrical data, temperature data at each of the regional power grid nodes and the opening and closing state data of the corresponding circuit breaker;

[0009] The protection action module is used to control the opening and closing operations of the corresponding circuit breakers according to the power supply and disconnection control signals corresponding to each of the regional power grid nodes.

[0010] Optionally, the data acquisition module includes an analog quantity acquisition unit, a temperature detection unit and a switch quantity acquisition unit;

[0011] The central processing unit is electrically connected to the analog quantity acquisition unit, the temperature detection unit, and the switch quantity acquisition unit respectively;

[0012] The analog quantity acquisition unit is used to collect electrical data at each of the regional power grid nodes and transmit it to the central processor;

[0013] The temperature detection unit is used to collect temperature data at each of the regional power grid nodes and transmit the data to the central processor;

[0014] The switch quantity acquisition unit is used to collect the opening and closing state data of the circuit breaker corresponding to each regional power grid node and transmit it to the central processor.

[0015] Optionally, the electrical control system further includes an opening and closing state display module;

[0016] The opening and closing state display module is electrically connected to the protection action module, and the opening and closing state display module is used to display the opening and closing state of the circuit breaker corresponding to each of the regional power grid nodes.

[0017] Optionally, the electrical control system further includes a low voltage early warning module;

[0018] The low voltage warning module is electrically connected to the central processor, and the central processor is also used to predict the voltage data at the next moment according to the electrical data at the historical moment at each of the regional power grid nodes, and generate a low voltage warning signal corresponding to each of the regional power grid nodes;

[0019] The low voltage warning module is used to issue a warning prompt of the occurrence of a low voltage event according to the low voltage warning signal corresponding to each of the regional power grid nodes.

[0020] Optionally, the low voltage warning module includes a warning prompt unit;

[0021] The early warning prompt unit is electrically connected to the central processing unit, and is used to issue an early warning prompt of the occurrence of a low voltage event through a visual display method according to the low voltage early warning signal corresponding to each of the regional power grid nodes, and / or to issue an early warning prompt of the occurrence of a low voltage event through voice.

[0022] Optionally, the electrical control system further includes an early warning reporting module;

[0023] The early warning report module is electrically connected to the central processing unit, and is used to generate an early warning analysis report for solving a low voltage event according to the low voltage early warning signal corresponding to each of the regional power grid nodes.

[0024] Optionally, the electrical control system further includes a voltage transformation execution module;

[0025] The voltage transformation execution module is electrically connected to the central processor, and the central processor is further used to generate a voltage regulation signal corresponding to each of the regional power grid nodes according to the electrical data at each of the regional power grid nodes;

[0026] The voltage transformation execution module is used to control the voltage step-up and step-down operations of the corresponding regional power grid nodes according to the voltage regulation signals corresponding to the regional power grid nodes.

[0027] Optionally, the electrical control system further comprises a data storage module;

[0028] The data storage module is electrically connected to the data acquisition module, and is used to store the electrical data, temperature data at each regional power grid node and the corresponding opening and closing state data of the circuit breaker collected by the data acquisition module.

[0029] Optionally, the electrical control system further includes an intelligent terminal module;

[0030] The intelligent terminal module is in communication with the central processor, and the central processor is further used to generate electrical data change information, temperature data change information and opening and closing state data change information corresponding to each of the regional power grid nodes according to the electrical data, temperature data and opening and closing state data of the corresponding circuit breaker at each of the regional power grid nodes;

[0031] The intelligent terminal module is used to remotely monitor the electrical data change information, temperature data change information and separation and connection state data change information corresponding to each of the regional power grid nodes.

[0032] In a second aspect, an embodiment of the present invention further provides an electrical control method for a distribution network, which is applied to an electrical control system of a distribution network as described in any one of the first aspects, wherein the distribution network includes a plurality of regional grid nodes, and a circuit breaker is provided at each of the regional grid nodes;

[0033] The electrical control method comprises:

[0034] Collecting electrical data, temperature data and the opening and closing state data of the corresponding circuit breakers at each of the regional power grid nodes;

[0035] Generate a power supply and power failure control signal corresponding to each of the regional power grid nodes according to the electrical data, temperature data at each of the regional power grid nodes and the opening and closing state data of the corresponding circuit breaker;

[0036] According to the power supply and power failure control signals corresponding to the regional power grid nodes, the opening and closing operations of the corresponding circuit breakers are controlled.

[0037] An embodiment of the present invention provides an electrical control system and an electrical control method for a distribution network, wherein the distribution network includes multiple regional power grid nodes, and each regional power grid node is provided with a circuit breaker; the electrical control system includes a data acquisition module, a central processing unit and a protection action module; the data acquisition module is used to collect electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node; the central processing unit is electrically connected to the data acquisition module and the protection action module respectively, and the central processing unit is used to generate a power supply and disconnection control signal corresponding to each regional power grid node according to the electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node; the protection action module is used to control the opening and closing operation of the corresponding circuit breaker according to the power supply and disconnection control signal corresponding to each regional power grid node. The electrical control system collects electrical data, temperature data and the opening and closing status data of the corresponding circuit breakers at the power grid nodes in each region to determine whether there are dangers such as overvoltage, overcurrent, overload, etc. at the power grid nodes in each region, and disconnects the faulty line by controlling the opening and closing operations of the corresponding circuit breakers, thereby avoiding the impact on the normal operation of other lines in the distribution network, achieving good monitoring and control of the distribution network, comprehensively improving the automation and intelligence level of the distribution network, ensuring the safe and reliable operation of the distribution network, forming a rectification and evaluation system for the distribution network that integrates monitoring, protection, and decision-making, and improving the efficiency of power failure management in the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 It is a structural schematic diagram of an electrical control system of a distribution network provided by an embodiment of the present invention;

[0040] Figure 2 It is a flow chart of an electrical control method for a distribution network provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. It should be noted that the directional words such as "upper", "lower", "left", "right" and the like described in the embodiments of the present invention are described at the angles shown in the accompanying drawings and should not be understood as limitations on the embodiments of the present invention. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is formed "on" or "under" another element, it can not only be directly formed "on" or "under" another element, but also indirectly formed "on" or "under" another element through an intermediate element. The terms "first", "second", etc. are only used for descriptive purposes and do not represent any order, quantity or importance, but are only used to distinguish different components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0043] The term “including” and its variations used in the present invention are open inclusions, that is, “including but not limited to.” The term “based on” means “based at least in part on.” The term “one embodiment” means “at least one embodiment.”

[0044] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish the corresponding contents, and are not used to limit the order or interdependence.

[0045] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0046] Figure 1 is a schematic diagram of the structure of an electrical control system of a distribution network provided by an embodiment of the present invention, such as Figure 1 As shown, the distribution network includes multiple regional grid nodes, and each regional grid node is provided with a circuit breaker; the electrical control system includes a data acquisition module 10, a central processing unit 20 and a protection action module 30; the data acquisition module 10 is used to collect electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional grid node; the central processing unit 20 is electrically connected to the data acquisition module 10 and the protection action module 30 respectively, and the central processing unit 20 is used to generate a power supply and disconnection control signal corresponding to each regional grid node according to the electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional grid node; the protection action module 30 is used to control the opening and closing operation of the corresponding circuit breaker according to the power supply and disconnection control signal corresponding to each regional grid node.

[0047] Specifically, the distribution network includes a plurality of regional grid nodes, and each regional grid node is provided with a circuit breaker. Exemplarily, the regional grid node may be a node corresponding to a circuit breaker installed at a distribution network, a substation, a circuit switch box, etc., and the regional grid node and the circuit breaker are set in a one-to-one correspondence relationship, so that the associated correspondence between each regional grid node and the grid line can be obtained according to the direction of the power flow of the grid. It can be understood that the associated correspondence between the regional grid node and the grid line is the controller of the power supply of the grid line controlled by the regional grid node, and when the corresponding circuit breaker of the regional grid node is opened, the corresponding grid line is broken. When the corresponding circuit breaker of the regional grid node is closed, the corresponding grid line forms a passage.

[0048] The electrical control system includes a data acquisition module 10, a central processing unit 20 and a protection action module 30. Among them, the data acquisition module 10 can collect electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node. Exemplarily, the data acquisition module 10 can collect electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node in real time or at a fixed time. Exemplarily, the electrical data can be at least one of current, voltage, load, active power, reactive power, power factor and electric quantity. The temperature data can be at least one of ambient temperature and circuit component temperature. The opening and closing state data can be the opening state of the circuit breaker and the closing state of the circuit breaker. In addition, exemplarily, the data acquisition module 10 can include a plurality of sensors, correspondingly collecting and obtaining electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node. And, the data acquisition module 10 is electrically connected to the central processing unit 20, and the data acquisition module 10 can also convert the analog data of the electrical data, temperature data and opening and closing state data into the form of digital data for subsequent transmission to the central processing unit 20.

[0049] The central processing unit 20 can receive the electrical data, temperature data and the opening and closing status data of the corresponding circuit breakers at each regional power grid node collected by the data acquisition module 10. Afterwards, it can also analyze the power situation at each regional power grid node based on the electrical data, temperature data and the opening and closing status data of the corresponding circuit breakers at each regional power grid node, and generate power supply and disconnection control signals corresponding to each regional power grid node. Exemplarily, the central processor 20 can adopt a distributed control strategy and a collaborative control strategy based on information interaction. The distributed control strategy delegates the decision-making and execution rights of the central processor 20 to each regional power grid node, that is, multiple regional power grid nodes are set in the distribution network, and each regional power grid node has intelligent control capabilities. The central processor 20 can realize efficient utilization of global energy resources and balanced distribution of energy through information exchange and collaboration between regional power grid nodes based on the power supply load and voltage of the regional power grid node itself. The central processor 20 will periodically exchange information, including the power supply load, power generation and energy storage capacity of each regional power grid node. By summarizing and analyzing this information, the central processor 20 can adjust the power supply strategy of the regional power grid node in real time. The operation strategy of the central processor 20 monitors and adjusts the power quality of each regional power grid node in real time. Exemplarily, the power quality includes frequency, voltage and harmonics. When there is a large difference in power quality between regional power grid nodes, the central processor 20 will automatically adjust the power supply strategy of the regional power grid node. That is, the central processor 20 can generate power supply and power failure control signals corresponding to the nodes of each regional power grid, so that the faulty line is powered off and cannot work, and the normal line is powered on and keeps working.

[0050] The central processor 20 is electrically connected to the protection action module 30, and the protection action module 30 can control the opening and closing operations of the corresponding circuit breakers according to the power supply and disconnection control signals corresponding to the received regional power grid nodes. In a specific embodiment, exemplarily, the central processor 20 determines that there are dangers such as overload, overvoltage, overcurrent, etc. at a certain regional power grid node based on the electrical data, temperature data at each regional power grid node and the opening and closing state data of the corresponding circuit breaker, and then generates a power-off control signal corresponding to the regional power grid node, and then the protection action module 30 controls the circuit breaker corresponding to the regional power grid node to perform the opening operation according to the received power-off control signal corresponding to the regional power grid node. In another specific embodiment, exemplarily, the central processor 20 determines that there are no dangers such as overload, overvoltage, overcurrent, etc. at a certain regional power grid node based on the electrical data, temperature data at each regional power grid node and the opening and closing state data of the corresponding circuit breaker, and then generates a power supply control signal corresponding to the regional power grid node, and then the protection action module 30 controls the circuit breaker corresponding to the regional power grid node to perform the closing operation according to the received power supply control signal corresponding to the regional power grid node.

[0051] The technical solution in the embodiment of the present invention is that the distribution network includes multiple regional power grid nodes, and each regional power grid node is provided with a circuit breaker; the electrical control system includes a data acquisition module, a central processing unit and a protection action module; the data acquisition module is used to collect electrical data, temperature data and the corresponding circuit breaker opening and closing state data at each regional power grid node; the central processing unit is electrically connected to the data acquisition module and the protection action module respectively, and the central processing unit is used to generate a power supply and disconnection control signal corresponding to each regional power grid node according to the electrical data, temperature data and the corresponding circuit breaker opening and closing state data at each regional power grid node; the protection action module is used to control the opening and closing operation of the corresponding circuit breaker according to the power supply and disconnection control signal corresponding to each regional power grid node. The electrical control system collects electrical data, temperature data and the opening and closing status data of the corresponding circuit breakers at the power grid nodes in each region to determine whether there are dangers such as overvoltage, overcurrent, overload, etc. at the power grid nodes in each region, and disconnects the faulty line by controlling the opening and closing operations of the corresponding circuit breakers, thereby avoiding the impact on the normal operation of other lines in the distribution network, achieving good monitoring and control of the distribution network, comprehensively improving the automation and intelligence level of the distribution network, ensuring the safe and reliable operation of the distribution network, forming a rectification and evaluation system for the distribution network that integrates monitoring, protection, and decision-making, and improving the efficiency of power failure management in the distribution network.

[0052] Optionally, continue to refer to Figure 1The data acquisition module 10 includes an analog quantity acquisition unit 11, a temperature detection unit 12 and a switch quantity acquisition unit 13; the central processing unit 20 is electrically connected to the analog quantity acquisition unit 11, the temperature detection unit 12 and the switch quantity acquisition unit 13 respectively; the analog quantity acquisition unit 11 is used to collect electrical data at each regional power grid node and transmit it to the central processing unit 20; the temperature detection unit 12 is used to collect temperature data at each regional power grid node and transmit it to the central processing unit 20; the switch quantity acquisition unit 13 is used to collect the opening and closing state data of the circuit breaker corresponding to each regional power grid node and transmit it to the central processing unit 20.

[0053] Specifically, the data acquisition module 10 includes an analog quantity acquisition unit 11, a temperature detection unit 12, and a switch quantity acquisition unit 13. The analog quantity acquisition unit 11 is electrically connected to the central processor 20, and the analog quantity acquisition unit 11 can collect electrical data at each regional power grid node and transmit it to the central processor 20. Exemplarily, the analog quantity acquisition unit 11 can be a combination of a voltage sensor, a current sensor, a power sensor, etc. The temperature detection unit 12 is electrically connected to the central processor 20, and the temperature detection unit 12 can collect temperature data at each regional power grid node and transmit it to the central processor 20. Exemplarily, the temperature detection unit 12 can be a temperature sensor, etc. The switch quantity acquisition unit 13 is electrically connected to the central processor 20, and the switch quantity acquisition unit 13 can collect the opening and closing state data of the circuit breaker corresponding to each regional power grid node and transmit it to the central processor 20. Exemplarily, the switch quantity acquisition unit 13 can be an opening and closing contact position detector, an opening and closing state sensor, etc.

[0054] Optionally, continue to refer to Figure 1 The electrical control system also includes a separation state display module 40; the separation state display module 40 is electrically connected to the protection action module 30, and the separation state display module 40 is used to display the separation state of the circuit breaker corresponding to each regional power grid node.

[0055] Specifically, the protection action module 30 can control the opening and closing operation of the corresponding circuit breaker according to the power supply and disconnection control signal corresponding to each regional power grid node received. The opening and closing state display module 40 is electrically connected to the protection action module 30, and the opening and closing state display module 40 can display the opening and closing state of the circuit breaker corresponding to each regional power grid node. In this way, not only can the user know the opening and closing state of the circuit breaker corresponding to each regional power grid node in time, but also it is conducive to the data interaction of the electrical control system. In addition, illustratively, the opening and closing state display module 40 can also display the electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node, and display these data in one-to-one correspondence with the opening and closing state of the corresponding circuit breaker.

[0056] Optionally, continue to refer to Figure 1The electrical control system also includes a low voltage warning module 50; the low voltage warning module 50 is electrically connected to the central processing unit 20, and the central processing unit 20 is also used to predict the voltage data at the next moment based on the electrical data at the historical moment at each regional power grid node, and generate a low voltage warning signal corresponding to each regional power grid node; the low voltage warning module 50 is used to issue a warning prompt of the occurrence of a low voltage event based on the low voltage warning signal corresponding to each regional power grid node.

[0057] Specifically, the central processor 20 can also predict the voltage data at the next moment according to the electrical data at the historical moment of each regional power grid node, and generate a low-voltage warning signal corresponding to each regional power grid node. Exemplarily, first, the basic data of the distribution line can be obtained to generate a basic information database, which is a relational database, which is convenient for the subsequent analysis of low-voltage events in the distribution network, wherein the basic data can be cable type, line length, load type and load size, etc. Then, a static calculation model of the distribution line is established according to the basic information database, and the power parameters of each node in each line are calculated, wherein the power parameters can be voltage, impedance and current information, etc. Exemplarily, a series of circuit analysis methods such as equivalent transformation method, node analysis method, loop analysis method, etc. can be used to calculate the voltage, impedance, current and other parameters of each node in each line. Then, the basic data of each distribution line is combined with the voltage, impedance, current and other parameters of each node in each line, and the static mathematical calculation model of the distribution line can be established, which greatly simplifies the complex distribution network. Afterwards, a distribution network line topology map is generated based on the static calculation model of the distribution line, and a low-voltage dynamic calculation model for the substation is established based on the distribution network line topology map. That is, the static calculation model simplifies the complex network distribution into a single node, including the node distribution and impedance of the entire substation. The distribution network topology map can be generated based on the node distribution and impedance of the substation. The voltage and current parameters of each branch are obtained according to the actual load size to form a low-voltage dynamic calculation model. In this way, the low-voltage level is calculated in real time according to the changes in basic information to achieve automatic real-time monitoring. Finally, the real-time voltage data and load data of each node in the distribution line are input into the low-voltage line early warning model to predict the occurrence point of low voltage and the affected substation. In this way, a low-voltage line early warning model is established based on AI big data technology to accurately predict the possible occurrence point of low voltage and the affected substation.

[0058] The central processing unit 20 is electrically connected to the low voltage warning module 50, and the low voltage warning module 50 can issue a warning prompt of the occurrence of a low voltage event based on the low voltage warning signal corresponding to each regional power grid node received. In a specific embodiment, illustratively, the central processing unit 20 predicts the voltage data at the next moment based on the electrical data at the historical moment at each regional power grid node, and determines that there is a possibility of low voltage at a certain regional power grid node, and then generates a low voltage warning signal corresponding to the regional power grid node, and then the low voltage warning module 50 issues a warning prompt of the occurrence of a low voltage event based on the low voltage warning signal corresponding to each regional power grid node received. It can be understood that the warning prompt includes the location information of the regional power grid node where the low voltage event may occur.

[0059] Further, continue to refer to Figure 1 The low voltage warning module 50 includes a warning prompt unit 51; the warning prompt unit 51 is electrically connected to the central processor 20, and the warning prompt unit 51 is used to issue a warning prompt of the occurrence of a low voltage event through a visual display method according to the low voltage warning signal corresponding to each regional power grid node, and / or, issue a warning prompt of the occurrence of a low voltage event through voice.

[0060] Specifically, the early warning prompt unit 51 can issue an early warning prompt of a low voltage event through a visual display method according to the low voltage early warning signal corresponding to each regional power grid node, and / or issue an early warning prompt of a low voltage event through voice. For example, a visual data interaction interface can be established through graphical programming means to intuitively display the voltage level of the distribution network to the user, so that the staff can fully grasp the regional low voltage situation in combination with the early warning information. The staff can zoom in and out of different areas as needed, so that the staff can grasp the operation of the power grid in real time. The user can also modify, edit, analyze and other operations on the data through the front-end interface.

[0061] Optionally, continue to refer to Figure 1 The electrical control system also includes an early warning reporting module 60; the early warning reporting module 60 is electrically connected to the central processor 20, and the early warning reporting module 60 is used to generate an early warning analysis report for solving low voltage events according to the low voltage early warning signals corresponding to the regional power grid nodes.

[0062] Specifically, the central processor 20 can also predict the voltage data at the next moment according to the electrical data at the historical moment of each regional power grid node, and generate a low voltage warning signal corresponding to each regional power grid node. The central processor 20 is electrically connected to the warning report module 60, and the warning report module 60 can generate a warning analysis report for solving the low voltage event according to the low voltage warning signal corresponding to each regional power grid node received. Exemplarily, the impact of low voltage events on equipment and systems can be evaluated based on the prediction results of voltage data and preset evaluation indicators at the low voltage occurrence location and the affected area, and the cause of low voltage can be analyzed in combination with historical data, and corresponding governance measures can be proposed. The AI ​​big data model is used to statistically integrate the distribution line profile and low voltage analysis to generate a low voltage warning analysis report. In this way, it is convenient for the staff to grasp the low voltage warning situation in a timely and comprehensive manner, refer to the warning analysis content to govern the low voltage area, effectively improve the governance efficiency, and form a rectification and evaluation system integrating monitoring, warning, and governance decision-making, which comprehensively improves the automation and intelligence level of low voltage governance of the distribution network and ensures the reliable operation of the distribution network.

[0063] Optionally, continue to refer to Figure 1 The electrical control system also includes a voltage transformation execution module 70; the voltage transformation execution module 70 is electrically connected to the central processing unit 20, and the central processing unit 20 is also used to generate a voltage regulation signal corresponding to each regional power grid node according to the electrical data at each regional power grid node; the voltage transformation execution module 70 is used to control the voltage step-up and step-down operations of the corresponding regional power grid node according to the voltage regulation signal corresponding to each regional power grid node.

[0064] Specifically, the central processor 20 can also analyze the power situation at each regional grid node according to the electrical data at each regional grid node, and generate a voltage regulation signal corresponding to each regional grid node. The central processor 20 is electrically connected to the transformer execution module 70, and the transformer execution module 70 can control the voltage-up and voltage-down operation of the corresponding regional grid node according to the received voltage regulation signal corresponding to each regional grid node. In a specific embodiment, exemplarily, the central processor 20 determines that there is a danger such as overvoltage at a certain regional grid node according to the electrical data at each regional grid node, and then generates a voltage regulation signal corresponding to the regional grid node, and then the transformer execution module 70 controls the corresponding regional grid node to perform a voltage-down operation according to the received voltage regulation signal corresponding to the regional grid node. In another specific embodiment, exemplarily, according to the electrical data at each regional grid node, it is determined that there is an increase in load and undervoltage at a certain regional grid node, and then the voltage regulation signal corresponding to the regional grid node is generated, and then the transformer execution module 70 controls the corresponding regional grid node to perform a voltage-up operation according to the received voltage regulation signal corresponding to the regional grid node.

[0065] Optionally, continue to refer to Figure 1 The electrical control system also includes a data storage module 80; the data storage module 80 is electrically connected to the data acquisition module 10, and the data storage module 80 is used to store the electrical data, temperature data and corresponding circuit breaker opening and closing state data at each regional power grid node collected by the data acquisition module 10.

[0066] Specifically, the data storage module 80 is set to facilitate the subsequent analysis and comparison of the historical electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node with the electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node collected in real time, so as to further optimize the signal generation capability and instruction accuracy of the central processor 20. Exemplarily, the data storage module 80 can be electrically connected to the analog quantity acquisition unit 11, the temperature detection unit 12, and the switch quantity acquisition unit 13, respectively, to store the corresponding electrical data, temperature data and opening and closing state data.

[0067] Optionally, continue to refer to Figure 1 The electrical control system also includes an intelligent terminal module 90; the intelligent terminal module 90 is in communication with the central processor 20, and the central processor 20 is also used to generate electrical data change information, temperature data change information and opening and closing state data change information corresponding to each regional power grid node according to the electrical data, temperature data and opening and closing state data of the corresponding circuit breaker at each regional power grid node; the intelligent terminal module 90 is used to remotely monitor the electrical data change information, temperature data change information and opening and closing state data change information corresponding to each regional power grid node.

[0068] Specifically, the central processor 20 can also generate electrical data change information corresponding to each regional power grid node according to the electrical data at each regional power grid node. For example, the electrical data change information can be expressed in a curve or table. And, the central processor 20 can also generate temperature data change information corresponding to each regional power grid node according to the temperature data at each regional power grid node. For example, the temperature data change information can be expressed in a curve or table. And, the central processor 20 can also generate the split state data change information corresponding to each regional power grid node according to the split state data of the circuit breaker corresponding to each regional power grid node. For example, the split state data change information can be expressed in a curve or table. The central processor 20 is connected to the intelligent terminal module 90 in communication. For example, the intelligent terminal module 90 can be a mobile phone, a computer, a tablet or other devices. The intelligent terminal module 90 can also be other control systems of the power distribution network. For example, the central processor 20 and the intelligent terminal module 90 can be connected to each other in communication through Ethernet, 4G, 5G, WiFi, Bluetooth or the like. The intelligent terminal module 90 can remotely monitor the electrical data change information, temperature data change information and separation and combination status data change information corresponding to each regional power grid node, thereby realizing data communication and information interaction, so that users can obtain relevant data information of the distribution network in real time, and monitor and control the operation of the distribution network.

[0069] Based on the same inventive concept, an embodiment of the present invention further provides an electrical control method for a distribution network. Figure 2 is a flow chart of an electrical control method for a distribution network provided in an embodiment of the present invention, the electrical control method is applied to an electrical control system of a distribution network provided in any one of the embodiments of the present invention, the distribution network includes a plurality of regional grid nodes, and a circuit breaker is provided at each regional grid node; Figure 2 As shown, the electrical control method includes:

[0070] S110, collecting electrical data, temperature data and opening and closing status data of corresponding circuit breakers at power grid nodes in each region.

[0071] Specifically, continue to refer to Figure 1, the distribution network includes multiple regional grid nodes, and each regional grid node is provided with a circuit breaker. Exemplarily, the regional grid node may be a node corresponding to a circuit breaker installed at a distribution network, a substation, a circuit switch box, etc., and the regional grid node and the circuit breaker are set in a one-to-one correspondence relationship. In this way, the associated correspondence between each regional grid node and the grid line can be obtained according to the direction of grid power flow. It can be understood that the associated correspondence between the regional grid node and the grid line is the controller of the power supply of the grid line controlled by the regional grid node. When the corresponding circuit breaker of the regional grid node is opened, the corresponding grid line is broken. When the corresponding circuit breaker of the regional grid node is closed, the corresponding grid line forms a passage.

[0072] The data acquisition module 10 can collect electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node. Exemplarily, the data acquisition module 10 can collect electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node in real time or at a fixed time. Exemplarily, the electrical data can be at least one of current, voltage, load, active power, reactive power, power factor and electric quantity. The temperature data can be at least one of ambient temperature and circuit component temperature. The opening and closing state data can be the opening state of the circuit breaker and the closing state of the circuit breaker. In addition, exemplarily, the data acquisition module 10 can include a plurality of sensors, correspondingly collecting and obtaining electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node. And, the data acquisition module 10 is electrically connected to the central processor 20, and the data acquisition module 10 can also convert the analog data of the electrical data, temperature data and opening and closing state data into the form of digital data for subsequent transmission to the central processor 20.

[0073] S120, generating a power supply and power failure control signal corresponding to each regional power grid node according to the electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node.

[0074] Specifically, continue to refer to Figure 1The central processing unit 20 can receive the electrical data, temperature data and the opening and closing status data of the corresponding circuit breaker at each regional power grid node collected by the data acquisition module 10. Afterwards, it can also analyze the power situation at each regional power grid node based on the electrical data, temperature data and the opening and closing status data of the corresponding circuit breaker at each regional power grid node, and generate power supply and disconnection control signals corresponding to each regional power grid node. Exemplarily, the central processor 20 can adopt a distributed control strategy and a collaborative control strategy based on information interaction. The distributed control strategy delegates the decision-making and execution rights of the central processor 20 to each regional power grid node, that is, multiple regional power grid nodes are set in the distribution network, and each regional power grid node has intelligent control capabilities. The central processor 20 can realize efficient utilization of global energy resources and balanced distribution of energy through information exchange and collaboration between regional power grid nodes based on the power supply load and voltage of the regional power grid node itself. The central processor 20 will periodically exchange information, including the power supply load, power generation and energy storage capacity of each regional power grid node. By summarizing and analyzing this information, the central processor 20 can adjust the power supply strategy of the regional power grid node in real time. The operation strategy of the central processor 20 monitors and adjusts the power quality of each regional power grid node in real time. Exemplarily, the power quality includes frequency, voltage and harmonics. When there is a large difference in power quality between regional power grid nodes, the central processor 20 will automatically adjust the power supply strategy of the regional power grid node. That is, the central processor 20 can generate power supply and power failure control signals corresponding to the nodes of each regional power grid, so that the faulty line is powered off and cannot work, and the normal line is powered on and keeps working.

[0075] S130. Control the opening and closing operations of corresponding circuit breakers according to the power supply and disconnection control signals corresponding to the power grid nodes in each region.

[0076] Specifically, continue to refer to Figure 1, the central processor 20 is electrically connected to the protection action module 30, and the protection action module 30 can control the opening and closing operations of the corresponding circuit breakers according to the power supply and disconnection control signals corresponding to the received regional power grid nodes. In a specific embodiment, exemplarily, the central processor 20 determines that there are dangers such as overload, overvoltage, overcurrent, etc. at a certain regional power grid node based on the electrical data, temperature data at each regional power grid node and the opening and closing state data of the corresponding circuit breaker, and then generates a power-off control signal corresponding to the regional power grid node, and then the protection action module 30 controls the circuit breaker corresponding to the regional power grid node to perform the opening operation according to the received power-off control signal corresponding to the regional power grid node. In another specific embodiment, exemplarily, the central processor 20 determines that there are no dangers such as overload, overvoltage, overcurrent, etc. at a certain regional power grid node based on the electrical data, temperature data at each regional power grid node and the opening and closing state data of the corresponding circuit breaker, and then generates a power supply control signal corresponding to the regional power grid node, and then the protection action module 30 controls the circuit breaker corresponding to the regional power grid node to perform the closing operation according to the received power supply control signal corresponding to the regional power grid node.

[0077] The technical solution in the embodiment of the present invention first collects the electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node, then generates the power supply and disconnection control signal corresponding to each regional power grid node according to the electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node, and finally controls the opening and closing operation of the corresponding circuit breaker according to the power supply and disconnection control signal corresponding to each regional power grid node. Using the above method, by collecting the electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node, it is judged whether there are dangers such as overvoltage, overcurrent, overload, etc. at each regional power grid node, and by controlling the opening and closing operation of the corresponding circuit breaker, the fault line is disconnected, avoiding the impact on the normal operation of other lines in the distribution network, realizing good monitoring and control of the distribution network, comprehensively improving the automation and intelligence level of the distribution network, ensuring the safe and reliable operation of the distribution network, forming a rectification and evaluation system for the distribution network integrating monitoring, protection and decision-making, and improving the efficiency of power failure management of the distribution network.

[0078] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electrical control system for a distribution network, characterized in that: The distribution network includes a plurality of regional grid nodes, and each of the regional grid nodes is provided with a circuit breaker; The electrical control system includes a data acquisition module, a central processing unit and a protection action module; The data acquisition module is used to collect electrical data, temperature data and the opening and closing state data of the corresponding circuit breaker at each regional power grid node; The central processor is electrically connected to the data acquisition module and the protection action module respectively, and is used to generate a power supply and power failure control signal corresponding to each of the regional power grid nodes according to the electrical data, temperature data at each of the regional power grid nodes and the opening and closing state data of the corresponding circuit breaker; The protection action module is used to control the opening and closing operations of the corresponding circuit breakers according to the power supply and disconnection control signals corresponding to each of the regional power grid nodes.

2. The electrical control system according to claim 1, characterized in that: The data acquisition module includes an analog quantity acquisition unit, a temperature detection unit and a switch quantity acquisition unit; The central processing unit is electrically connected to the analog quantity acquisition unit, the temperature detection unit, and the switch quantity acquisition unit respectively; The analog quantity acquisition unit is used to collect electrical data at each of the regional power grid nodes and transmit it to the central processor; The temperature detection unit is used to collect temperature data at each of the regional power grid nodes and transmit the data to the central processor; The switch quantity acquisition unit is used to collect the opening and closing state data of the circuit breaker corresponding to each regional power grid node and transmit it to the central processor.

3. The electrical control system according to claim 1, characterized in that: The electrical control system also includes an opening and closing state display module; The opening and closing state display module is electrically connected to the protection action module, and the opening and closing state display module is used to display the opening and closing state of the circuit breaker corresponding to each of the regional power grid nodes.

4. The electrical control system according to claim 1, characterized in that: The electrical control system also includes a low voltage warning module; The low voltage warning module is electrically connected to the central processor, and the central processor is also used to predict the voltage data at the next moment according to the electrical data at the historical moment at each of the regional power grid nodes, and generate a low voltage warning signal corresponding to each of the regional power grid nodes; The low voltage warning module is used to issue a warning prompt of the occurrence of a low voltage event according to the low voltage warning signal corresponding to each of the regional power grid nodes.

5. The electrical control system according to claim 4, characterized in that: The low voltage warning module includes a warning prompt unit; The early warning prompt unit is electrically connected to the central processing unit, and is used to issue an early warning prompt of the occurrence of a low voltage event through a visual display method according to the low voltage early warning signal corresponding to each of the regional power grid nodes, and / or to issue an early warning prompt of the occurrence of a low voltage event through voice.

6. The electrical control system according to claim 4, characterized in that: The electrical control system also includes an early warning reporting module; The early warning report module is electrically connected to the central processing unit, and is used to generate an early warning analysis report for solving a low voltage event according to the low voltage early warning signal corresponding to each of the regional power grid nodes.

7. The electrical control system according to claim 1, characterized in that: The electrical control system also includes a voltage transformation execution module; The voltage transformation execution module is electrically connected to the central processor, and the central processor is further used to generate a voltage regulation signal corresponding to each of the regional power grid nodes according to the electrical data at each of the regional power grid nodes; The voltage transformation execution module is used to control the voltage step-up and step-down operations of the corresponding regional power grid nodes according to the voltage regulation signals corresponding to the regional power grid nodes.

8. The electrical control system according to claim 1, characterized in that: The electrical control system also includes a data storage module; The data storage module is electrically connected to the data acquisition module, and is used to store the electrical data, temperature data at each regional power grid node and the corresponding opening and closing state data of the circuit breaker collected by the data acquisition module.

9. The electrical control system according to claim 1, characterized in that: The electrical control system also includes an intelligent terminal module; The intelligent terminal module is in communication with the central processor, and the central processor is further used to generate electrical data change information, temperature data change information and opening and closing state data change information corresponding to each of the regional power grid nodes according to the electrical data, temperature data and opening and closing state data of the corresponding circuit breaker at each of the regional power grid nodes; The intelligent terminal module is used to remotely monitor the electrical data change information, temperature data change information and separation and connection state data change information corresponding to each of the regional power grid nodes.

10. An electrical control method for a distribution network, characterized in that: Applicable to an electrical control system of a distribution network as claimed in any one of claims 1 to 9, wherein the distribution network comprises a plurality of regional grid nodes, and a circuit breaker is provided at each of the regional grid nodes; The electrical control method comprises: Collecting electrical data, temperature data and the opening and closing state data of the corresponding circuit breakers at each of the regional power grid nodes; Generate a power supply and power failure control signal corresponding to each of the regional power grid nodes according to the electrical data, temperature data at each of the regional power grid nodes and the opening and closing state data of the corresponding circuit breaker; According to the power supply and power failure control signals corresponding to the regional power grid nodes, the opening and closing operations of the corresponding circuit breakers are controlled.

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