CN-122000941-A - Intelligent circuit breaker-based dynamic voltage regulation method and system for power grid

CN122000941ACN 122000941 ACN122000941 ACN 122000941ACN-122000941-A

Abstract

The invention relates to the technical field of intelligent control of low-voltage power networks, in particular to a dynamic voltage regulating method and a system of a low-voltage power network based on an intelligent circuit breaker, which firstly acquire self state tables periodically broadcasted by other nodes in the low-voltage power network, then according to the received self state tables, updating a neighborhood state view chart maintained locally, detecting whether a voltage regulation requirement exists, if so, obtaining an auxiliary node based on the neighborhood state view chart, and finally sending a help signal to the auxiliary node, wherein the help signal is used for requesting the auxiliary node to execute auxiliary voltage regulation. The invention adopts a decentralized distributed cooperative mechanism, can rapidly respond to voltage fluctuation caused by the random load of residential electricity, and solves the problem that the dynamic adjustment is difficult due to the random and scattered load of the user side of the power grid in the prior art.

Inventors

ZHANG XIAOYAN
ZHANG YAN
SHI JUN
ZHAO WEI
GAO SHENG
TAN XINDONG

Assignees

国网山西省电力有限公司朔州供电分公司

Dates

Publication Date: 20260508
Application Date: 20260403

Claims (10)

1. A dynamic voltage regulation method of a power grid based on an intelligent circuit breaker is characterized by comprising the following steps: acquiring a self state table periodically broadcasted by other nodes in the low-voltage power grid, wherein the nodes are intelligent circuit breakers in the low-voltage power grid, and the self state table is used for representing the state information of one intelligent circuit breaker; Updating a neighborhood state view chart maintained locally according to the received self state table, wherein the neighborhood state view chart is used for representing state information of a neighborhood intelligent breaker of the intelligent breaker; detecting whether a voltage regulation requirement exists, and if so, obtaining an auxiliary node based on a neighborhood state view chart; And sending a help signal to the auxiliary node, wherein the help signal is used for requesting the auxiliary node to execute auxiliary voltage regulation.
2. The intelligent circuit breaker-based dynamic voltage regulation method of the power grid, according to claim 1, wherein the fields in the self state table and the neighborhood state view table each comprise a unique identifier of a node, a node electrical parameter, a voltage regulation capability identifier and a table update time, and the fields in the neighborhood state view table further comprise a node hop count.
3. The intelligent circuit breaker-based dynamic voltage regulation method of the power grid according to claim 2, wherein updating the locally maintained neighborhood state view table according to the received self state table comprises: checking the hop count of the received self state table, and discarding the self state table if the hop count exceeds a preset threshold; if the hop count does not exceed the preset threshold value, checking whether an entry which is the same as the unique identifier of the self state table exists in the neighborhood state view table; if no entry with the same unique identifier exists, the self state table and the corresponding hop count are added as a new entry in the neighborhood state view table; If the entries with the same unique identifiers exist, comparing the table update time of the entries and the self state table; If the table updating time corresponding to the entry is up to date, discarding the self state table; If the received self state table has the latest table updating time, the self state table and the corresponding hop count are used for covering the entry; based on the table update time, stale entries in the neighborhood state view table are deleted.
4. The intelligent circuit breaker-based dynamic voltage regulation method of the power grid, according to claim 2, is characterized by detecting whether there is a voltage regulation requirement, if so, obtaining an auxiliary node based on a neighborhood state view diagram, comprising: Detecting whether a voltage regulation requirement exists, if so, initializing a voltage regulation decision table, wherein the voltage regulation decision table is used for representing state information of the current voltage regulation requirement; And obtaining the auxiliary node according to the voltage regulation decision table and the neighborhood state view chart.
5. The intelligent circuit breaker-based dynamic voltage regulation method of the low-voltage power network of claim 4, wherein the fields in the voltage regulation decision table comprise unique identifiers of voltage regulation requirements, unique identifiers corresponding to voltage regulation requirement nodes, voltage regulation parameters and voltage regulation capability requirement identifiers, and the obtaining auxiliary nodes according to the voltage regulation decision table and the neighborhood state view table comprises the following steps: According to the voltage regulation electrical parameter field in the voltage regulation decision table and the node electrical parameter field in the neighborhood state view chart, obtaining the voltage correlation and the load adaptation degree of each node in the neighborhood state view chart; obtaining the pressure regulating capability matching degree of each node in the neighborhood state view chart according to the pressure regulating capability requirement identification field in the pressure regulating decision table and the pressure regulating capability identification field in the neighborhood state view chart; and obtaining the auxiliary node according to the node hop count field, the voltage correlation of each node, the load adaptation degree and the voltage regulation capability matching degree in the neighborhood state view chart.
6. The intelligent circuit breaker-based dynamic voltage regulation method of the power grid, as set forth in claim 4, wherein the fields in the voltage regulation decision table further comprise a voltage regulation status identifier, a cumulative voltage regulation times and a selected auxiliary node list, detecting whether a voltage regulation requirement exists, and if so, obtaining the auxiliary node based on the neighborhood state view table, further comprising: acquiring a feedback signal after the auxiliary node executes auxiliary voltage regulation, and updating a voltage regulation state identification field and a selected auxiliary node list field in a voltage regulation decision table according to the feedback signal; And detecting whether the voltage regulation requirement exists again, if so, eliminating the nodes in the selected auxiliary node list from the neighborhood state view chart, re-executing the step of obtaining the auxiliary nodes according to the voltage regulation decision chart and the neighborhood state view chart, and updating the accumulated voltage regulation times field.
7. The intelligent circuit breaker-based dynamic voltage regulation method of the power grid, as set forth in claim 6, wherein detecting whether there is a voltage regulation requirement, if so, obtaining the auxiliary node based on the neighborhood state view diagram, further includes: If the value in the accumulated voltage regulating times field reaches the upper limit, or no node capable of serving as a new auxiliary node exists in the neighborhood state view table, the accumulated voltage regulating times field comprises the following steps: And sending a voltage regulation requirement initialization signal to the selected auxiliary node according to the voltage regulation decision table and the selected auxiliary node list, wherein the voltage regulation requirement initialization signal is used for establishing the voltage regulation requirement in the auxiliary node and initializing the voltage regulation decision table in the auxiliary node.
8. An intelligent circuit breaker-based dynamic voltage regulating system for a power grid, comprising: The broadcast receiving module is used for acquiring self state tables periodically broadcast by other nodes in the low-voltage power network, wherein the nodes are intelligent circuit breakers in the low-voltage power network, and the self state tables are used for representing state information of one intelligent circuit breaker; The local maintenance module is used for updating a neighborhood state view chart which is locally maintained according to the received state table, wherein the neighborhood state view chart is used for representing the state information of a neighborhood intelligent breaker of the intelligent breaker; the demand analysis module is used for detecting whether a pressure regulating demand exists, and if so, obtaining an auxiliary node based on the neighborhood state view chart; The auxiliary request module is used for sending a help signal to the auxiliary node, wherein the help signal is used for requesting the auxiliary node to execute auxiliary voltage regulation.
9. An electronic device, comprising: A memory and a processor; The memory is for storing a program, and the processor is for performing the steps in the intelligent circuit breaker based power grid dynamic voltage regulation method of any one of claims 1-7 when said program is executed.
10. A computer readable storage medium storing a computer readable program or instructions which, when executed by a processor, is capable of carrying out the steps of the intelligent circuit breaker based power grid dynamic voltage regulation method of any one of claims 1-7.

Description

Intelligent circuit breaker-based dynamic voltage regulation method and system for power grid Technical Field The invention relates to the technical field of intelligent control of a low-voltage power network, in particular to a dynamic voltage regulation method and system of the low-voltage power network based on an intelligent circuit breaker. Background In a low-voltage power grid, voltage regulation faces remarkable scene specificity, namely the voltage regulation faces to end users directly, stable operation of electric equipment such as residents, businesses and the like needs to be guaranteed, the voltage quality requirement is far higher than that of a high-voltage power grid, meanwhile, nodes of the low-voltage power grid are dense, branches are numerous, the voltage regulation needs to cover a multi-node scattered scene, a user side load presents remarkable randomness and fluctuation, the starting time and the power requirement of the load are difficult to predict, local voltage surge or sudden drop is easy to occur (for example, short-time overvoltage of bus voltage can be caused when an electric vehicle is charged intensively, and under-voltage can be caused when a high-power electric appliance is turned off simultaneously). The randomness of the residential electricity consumption behavior and the multi-node distributed control characteristic bring multiple challenges to the voltage regulation of the power grid, on one hand, the unpredictability of the random load at the user side makes the traditional static voltage regulation strategy difficult to track the voltage change in real time, voltage regulation hysteresis or overshoot is easy to occur, and on the other hand, in the multi-node distributed control scene, each voltage regulation device independently makes a decision, and the lack of global coordination can cause local voltage overshoot or voltage regulation resource waste, further aggravate voltage fluctuation and influence the reliability of the user equipment. Therefore, a new intelligent control technology of the electric power network is needed to solve the problem that the load on the user side of the electric power network is random and scattered. Disclosure of Invention Therefore, the invention provides a dynamic voltage regulating method and system for a low-voltage power network based on an intelligent circuit breaker, which are used for solving the problem that dynamic regulation is difficult due to random and scattered load on a user side of the low-voltage power network in the prior art. The invention provides a dynamic voltage regulation method of a low-voltage power network based on an intelligent circuit breaker, which comprises the following steps: acquiring a self state table periodically broadcasted by other nodes in the low-voltage power grid, wherein the nodes are intelligent circuit breakers in the low-voltage power grid, and the self state table is used for representing the state information of one intelligent circuit breaker; Updating a neighborhood state view chart maintained locally according to the received self state table, wherein the neighborhood state view chart is used for representing state information of a neighborhood intelligent breaker of the intelligent breaker; detecting whether a voltage regulation requirement exists, and if so, obtaining an auxiliary node based on a neighborhood state view chart; And sending a help signal to the auxiliary node, wherein the help signal is used for requesting the auxiliary node to execute auxiliary voltage regulation. In a preferred implementation, the fields in the self state table and the neighborhood state view table each include a unique identifier of a node, a node electrical parameter, a voltage regulation capability identification, and a table update time, and the fields in the neighborhood state view table further include a node hop count. In a preferred implementation, updating a locally maintained neighborhood state view map based on a received self state table includes: checking the hop count of the received self state table, and discarding the self state table if the hop count exceeds a preset threshold; if the hop count does not exceed the preset threshold value, checking whether an entry which is the same as the unique identifier of the self state table exists in the neighborhood state view table; if no entry with the same unique identifier exists, the self state table and the corresponding hop count are added as a new entry in the neighborhood state view table; If the entries with the same unique identifiers exist, comparing the table update time of the entries and the self state table; If the table updating time corresponding to the entry is up to date, discarding the self state table; If the received self state table has the latest table updating time, the self state table and the corresponding hop count are used for covering the entry; based on the table update time, stale entries in the neighborh