CN-122001000-A - Digital power grid element multi-voltage-class integrated dispatching method and system

CN122001000ACN 122001000 ACN122001000 ACN 122001000ACN-122001000-A

Abstract

The invention provides a multi-voltage-class integrated dispatching method and system for digital power grid elements, which comprise the steps of determining a plurality of voltage class layers, interlayer coupling relations and interlayer energy flow transmission rules of the voltage class layers based on an acquired multi-source data fusion pool of the digital power grid elements, constructing multi-voltage-class cross-layer fusion topology based on the voltage class layers, the interlayer coupling relations and the interlayer energy flow transmission rules, constructing a topology node association map by taking each voltage class bus in the multi-voltage-class cross-layer fusion topology as a starting node and adopting a breadth-first traversal algorithm, generating a multi-voltage-class integrated topology model based on the topology node association map, and dispatching the digital power grid according to the multi-voltage-class integrated topology model. The accurate depiction of the coupling relation between the power grid cross-level energy and the information is realized, and the cross-level collaborative scheduling and panoramic monitoring capability of the power grid is improved.

Inventors

Zhang Mouming
YANG CHEN
ZHONG YUEPING
LIU MENGQI
YAN JIAO

Assignees

北京国电通网络技术有限公司
国网信息通信产业集团有限公司

Dates

Publication Date: 20260508
Application Date: 20251202

Claims (10)

1. The digital power grid element multi-voltage-class integrated dispatching method is characterized by comprising the following steps of: Determining a plurality of voltage class layers, interlayer coupling relations and interlayer energy flow transmission rules based on the acquired multi-source data fusion pool of the digital power grid elements; constructing a multi-voltage-class cross-layer fusion topology based on the plurality of voltage class layers, the inter-layer coupling relationship and the inter-layer energy flow transmission rule; Taking each voltage class bus in the multi-voltage class cross-layer fusion topology as a starting node, and constructing a topology node association map by adopting a breadth-first traversal algorithm; Generating a multi-voltage-class integrated topology model based on the topology node association map; and dispatching the digital power grid according to the multi-voltage-class integrated topology model.
2. The method of claim 1, wherein the constructing a multi-voltage-class cross-layer fusion topology based on the plurality of voltage-class layers, the inter-layer coupling relationship, and the inter-layer energy flow transmission rule comprises: Based on the voltage class layers, constructing a ring topology structure according to a preset high voltage interval, constructing a radial topology structure according to a preset medium voltage interval, and constructing a micro-grid topology structure according to a preset low voltage interval; constructing a directional connection relation among the ring topology structure, the radial topology structure and the micro-grid topology structure through transformer or converter interface equipment, defining an interlayer energy flow transmission rule according to the interlayer coupling relation for the directional connection relation, and forming a multi-voltage-class cross-layer fusion topology; The interlayer energy flow transmission rule comprises a step-down transmission rule from a high voltage level to a low voltage level and a back feed rule from a micro-grid topological structure to a radial topological structure according to the voltage level.
3. The method according to claim 2, wherein the process of constructing the topology node association graph comprises: constructing a plurality of topological islands based on a distributed power supply, an energy storage device and a charging pile in the multi-voltage-class cross-layer fusion topology, wherein each topological island comprises at least one distributed power supply, an energy storage device and a charging pile; abstracting a bus, a transformer, a power transmission line, a distributed power supply, an energy storage device, a charging pile and each topological island in the multi-voltage-class cross-layer fusion topology into nodes; Taking each voltage class bus as a starting node, adopting a breadth-first traversal algorithm, traversing the nodes according to preset node importance priorities, and constructing a topology node association map; the node importance priority order comprises a bus, a transformer, a power transmission line, a distributed power supply, an energy storage device, a charging pile and the topological islands.
4. The method of claim 1, wherein generating a multi-voltage level integrated topology model based on the topology node association graph comprises: analyzing association relation, voltage grade and electric coupling characteristic among nodes based on the topology node association map; and integrating the association relation, the voltage class and the electric coupling characteristic with the interlayer energy flow transmission rule to construct a multi-voltage class integrated topology model comprising voltage classes and dynamic energy flow paths.
5. The method of claim 3, further comprising, after said constructing a plurality of topological islands based on distributed power supplies, energy storage devices, and charging piles in said multi-voltage class cross-layer fusion topology: Based on each topological island, when the state of equipment in the topological island is monitored to be changed, the local topological area of the topological island influenced by changed equipment is positioned by inquiring the topological node association map to obtain a local topological area to be updated, and nodes and connection relations in the local topological area to be updated are traversed and updated to generate the updated topological island.
6. The method of claim 4, further comprising, after the generating a multi-voltage level integrated topology model based on the topology node association graph: acquiring real-time operation data of a digital power grid; Mapping the real-time operation data to corresponding nodes and branch parameters of the multi-voltage-class integrated topology model according to the multi-voltage-class integrated topology model topology structure to form a physical mapping model; When the deviation between the model estimated value and the real-time operation data exceeds a preset threshold value, triggering an automatic calibration process, and correcting parameters of the multi-voltage-class integrated topology model to form a final multi-voltage-class integrated topology model.
7. The method of claim 1, wherein the process of obtaining the multisource data fusion pool of digital grid elements comprises: Acquiring multi-source data of a digital power grid, wherein the multi-source data comprises equipment parameters in the digital power grid, on-line operation data of the digital power grid and geographic information data of equipment; And carrying out fusion processing on the preprocessed multi-source data to form a multi-source data fusion pool of the digital power grid elements.
8. The method of claim 1, wherein the scheduling the digital power grid according to the multi-voltage class integration topology model comprises: Monitoring the running states of energy flows between each voltage class layer and each layer of the digital power grid according to the topology node association map in the multi-voltage class integrated topology model; And based on the running states of the voltage class layers and the interlayer energy flows, carrying out cooperative scheduling on the distributed power supply, the power grid line, the energy storage device and the charging pile of the digital power grid, wherein the distributed power supply is of a voltage class.
9. A digital power grid element multi-voltage class integrated dispatch system, comprising: The determining module is used for determining a plurality of voltage class layers, interlayer coupling relations and interlayer energy flow transmission rules of the voltage class layers based on the acquired multi-source data fusion pool of the digital power grid elements; The fusion topology construction module is used for constructing a multi-voltage-class cross-layer fusion topology based on the plurality of voltage class layers, the interlayer coupling relation and the interlayer energy flow transmission rule; the topology node association map construction module is used for constructing a topology node association map by taking each voltage class bus in the multi-voltage class cross-layer fusion topology as a starting node and adopting a breadth-first traversal algorithm; The integrated topology model construction module is used for generating a multi-voltage-class integrated topology model based on the topology node association map; and the dispatching module is used for dispatching the digital power grid according to the multi-voltage-class integrated topology model.
10. The electronic equipment is characterized by comprising at least one processor and a memory, wherein the memory and the processor are connected through a bus; The memory is used for storing one or more programs; the digital grid element multi-voltage level integrated dispatch method of any one of claims 1-8, when the one or more programs are executed by the at least one processor.

Description

Digital power grid element multi-voltage-class integrated dispatching method and system Technical Field The invention belongs to the technical field of intelligent power grid digitization, and particularly relates to a multi-voltage-class integrated dispatching method and system for digital power grid elements. Background The digital twin power grid technology goes through the development process from single equipment simulation to full system mirror image mapping, and is initially applied to the scenes of power grid planning design, operation, maintenance, scheduling control and the like. The topology modeling is taken as a core foundation of digital twin, and bears the digital conversion functions of physical power grid structure, equipment association and running state, and the precision and suitability of the topology modeling directly determine the digital twin application effect. The key core technology of topology modeling mainly comprises a topology modeling standard, a multi-source data fusion technology, a dynamic topology updating algorithm and a voltage class cross-layer correlation method. Taking a public information model (Common Information Model, CIM) as an example, the method is an important standard for modeling a topological structure and is also a core framework for realizing the information standardization of power grid equipment. The CIM model is a core framework for power grid equipment information standardization, multi-source data fusion is used for integrating heterogeneous data such as equipment parameters, operation data and geographic information, a dynamic topology updating algorithm needs to respond to real-time changes such as equipment switching and state change, and a cross-layer correlation method needs to describe the coupling relation between energy flows and information flows of different voltage levels. However, the existing digital power grid dispatching method adopts a single voltage level topology modeling technology, has the problem of hierarchical fracture, does not accurately describe information flow coupling relation, has insufficient cross-hierarchy collaborative analysis capability, and cannot support panoramic monitoring requirements of a novel power system. Disclosure of Invention In order to overcome the above-mentioned shortcomings of the prior art, in a first aspect, the present application proposes a digital power grid element multi-voltage class integrated scheduling method, including: Determining a plurality of voltage class layers, interlayer coupling relations and interlayer energy flow transmission rules based on the acquired multi-source data fusion pool of the digital power grid elements; constructing a multi-voltage-class cross-layer fusion topology based on the plurality of voltage class layers, the inter-layer coupling relationship and the inter-layer energy flow transmission rule; Taking each voltage class bus in the multi-voltage class cross-layer fusion topology as a starting node, and constructing a topology node association map by adopting a breadth-first traversal algorithm; Generating a multi-voltage-class integrated topology model based on the topology node association map; and dispatching the digital power grid according to the multi-voltage-class integrated topology model. Preferably, the constructing a multi-voltage-class cross-layer fusion topology based on the plurality of voltage-class layers, the inter-layer coupling relationship, and the inter-layer energy flow transmission rule includes: Based on the voltage class layers, constructing a ring topology structure according to a preset high voltage interval, constructing a radial topology structure according to a preset medium voltage interval, and constructing a micro-grid topology structure according to a preset low voltage interval; constructing a directional connection relation among the ring topology structure, the radial topology structure and the micro-grid topology structure through transformer or converter interface equipment, defining an interlayer energy flow transmission rule according to the interlayer coupling relation for the directional connection relation, and forming a multi-voltage-class cross-layer fusion topology; The interlayer energy flow transmission rule comprises a step-down transmission rule from a high voltage level to a low voltage level and a back feed rule from a micro-grid topological structure to a radial topological structure according to the voltage level. Preferably, the construction process of the topology node association map includes: constructing a plurality of topological islands based on a distributed power supply, an energy storage device and a charging pile in the multi-voltage-class cross-layer fusion topology, wherein each topological island comprises at least one distributed power supply, an energy storage device and a charging pile; abstracting a bus, a transformer, a power transmission line, a distributed power supply, an energy sto