CN-121998268-A - Core distribution network analysis device considering key load power supply capacity

CN121998268ACN 121998268 ACN121998268 ACN 121998268ACN-121998268-A

Abstract

The invention discloses a core distribution network analysis device considering key load power supply capacity, which comprises a data acquisition module, a voltage level identification unit, a load importance assessment engine, a transformer substation quantitative assessment model, a risk assessment decision support system and an electronic map integration module which are sequentially connected, wherein the risk assessment decision support system is connected with a report generator and a user interaction interface, the voltage level identification unit carries out intelligent classification on a distribution network to obtain a user type and a power supply area function, and the load importance assessment engine distributes weights for different load levels according to the user type and the power supply area function. According to the core distribution network analysis device for calculating the key load power supply capacity, when a power system is planned, quantitative evaluation analysis of the importance of the transformer substations of the urban power system is realized by calculating the importance level difference of different loads and considering the quantity proportion constraint of the transformer substations of each voltage level, and reference data is provided for operators, decision makers and planners of the power system.

Inventors

LU YU
DENG MENGHUA
LU CHAO
LIU YIHUA
SUN ZHIHENG
HONG YU

Assignees

国网上海市电力公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (10)

1. The utility model provides a core distribution network analysis device that takes into account key load power supply ability, its characterized in that includes data acquisition module, voltage level identification unit, load importance evaluation engine, transformer substation's quantitative evaluation model, risk assessment decision support system and electronic map integrated module that link to each other in proper order, risk assessment decision support system is connected with report generator and user interaction interface, wherein: The power distribution network analysis planning method comprises the steps of automatically collecting real-time data of a power distribution network by a data acquisition module, intelligently classifying the power distribution network by a voltage grade identification unit to obtain a user type and a power supply area function, distributing weights for different load grades by a load importance assessment engine according to the user type and the power supply area function, calculating importance indexes of all substations by a substation quantitative assessment model according to information in the load importance assessment engine, simultaneously considering proportional constraints of the number of the substations, providing a power distribution network analysis planning scheme by a risk assessment decision support system according to the importance indexes of the substations and the proportional constraints of the number of the substations calculated by the substation quantitative assessment model, visualizing the power distribution network analysis planning scheme by an electronic map integration module, directly displaying the power distribution network analysis planning scheme result on a user interaction interface for visual understanding by an operator, and automatically compiling a corresponding power distribution network analysis planning report by a report generator.
2. A core power distribution network analysis arrangement in view of critical load power supply capacity according to claim 1, characterized in that the power distribution network real-time data comprises voltage class and load conditions.
3. The core distribution network analysis device according to claim 1, wherein the load importance assessment engine comprehensively considers the importance of different facilities in social operation to intelligently and hierarchically process the loads of the power system, and in emergency situations, the power supply of government authorities and fire departments is given the highest priority, and important factories where medical facilities, resident power consumption and those power failures cause serious economic losses are identified as the next-level priority; The method comprises the steps of carrying out weighting treatment on substations according to the priority sequence, obtaining the highest weight in an algorithm for the substations connected with the highest priority load to ensure safe and stable power supply of the substations, considering the power quality and the toughness of a power grid for the substations connected with the next priority load to ensure continuous power supply of the key loads, correspondingly lower weight in the algorithm for the substations mainly connected with the lowest priority load, and carrying out reasonable power supply according to the overall operation condition and the resource allocation condition of the power grid.
4. A core distribution network analysis device according to claim 3, wherein the power supply priority of each facility is dynamically calculated and determined according to real-time data of the distribution network and preset priority criteria, and the information is presented on an electronic map in an intuitive manner, thereby providing a clear decision support tool for the grid operators.
5. The core power distribution network analysis device according to claim 1, wherein the substation quantitative evaluation model considers the operation characteristics of the power system under different voltage levels, automatically identifies the voltage levels covered by the power distribution network, and automatically adjusts the internal algorithm and evaluation parameters according to the information so as to adapt to the characteristics of the power system under different levels.
6. A core distribution network analysis device taking into account critical load power supply capacity according to claim 5, characterized in that the distribution networks of different voltage classes comprise a 500kV ultra high voltage transmission network, a 220kV high voltage transmission network, a 35kV distribution network and a 10kV distribution network.
7. The core power distribution network analysis device according to claim 6, wherein for 500kV ultra-high voltage transmission network, the loss caused by the fault is huge, and the reliability of electricity consumption of a plurality of important electricity consumers N in the coverage area is additionally considered, as shown in formula 1: In the formula (1), U quality represents the power quality, alpha 1 and alpha 2 are weight coefficients of different types of users respectively, and the power quality of all users in the range is considered, but the weight on the key load is larger, and the weight on other user sets M is lower.
8. The core power distribution network analysis device according to claim 6, wherein for a 220kV high-voltage power transmission network, the optimization objective is set to satisfy the randomness of power consumption of the user for a long time, as shown in formula 2, so that the electric energy gap of the user of the whole power transmission network in the calculation period is the lowest: min∑ER gap (2) In the formula (2), E gap is an optimized objective function of the electric energy gap.
9. A core distribution network analysis arrangement in view of critical load power supply capacity according to claim 6, characterized in that the 35kV distribution network connects the high voltage network and the low voltage network and provides power directly to industrial and commercial users, the 10kV distribution network is closer to the end users and is responsible for providing power to residents and small commercial users, with shorter transmission distances and smaller transmission capacities, and in the constraints of the 35kV distribution network and the 10kV distribution network, the main trend constraints are working and compensation devices of the respective decentralized nodes are needed to be counted.
10. The core power distribution network analysis device considering the key load power supply capacity according to claim 1, wherein the core power distribution network analysis device has the capacity of accessing power grid planning data, shows analysis results of current and future newly added sites, and gives analysis planning results of optimal sites, optimal capacity ratio and optimal compensation device configuration of different sites.

Description

Core distribution network analysis device considering key load power supply capacity Technical Field The invention relates to a core power distribution network analysis device considering key load power supply capacity. Background Currently, urban power systems often contain substations of different voltage levels, such as 10kV, 35kV, 110kV, 220kV and 500kV, to meet the increasing power demands. These substations play a vital role in the power system, in charge of the transmission, distribution and final supply of power to the consumers. Substations of different voltage classes vary in importance according to their location in the grid structure, the range of power supply, and the power supply capacity to critical infrastructure. However, the prior art has shortcomings in quantitatively evaluating the importance of a substation. Conventional evaluation devices often rely on qualitative analysis and empirical determination, lacking uniform quantization standards and accurate computational models. This results in a lack of scientific basis for decisions in terms of grid planning, resource allocation, risk management, emergency response, etc., and the inability to efficiently identify and prioritize high risk areas in the grid. The existing power system planning model and the existing device theory lack quantitative evaluation devices for importance of substations with different voltage levels, so that actual roles and potential risks of the substations in a power system cannot be accurately predicted and evaluated, and accurate data support is difficult to provide for power grid planning and construction. In addition, the existing power system lacks systematic analysis of the differences of the importance levels of the loads of the substations, the substations of all levels are regarded as objects with uniform importance levels to be optimally scheduled, and unnecessary loss of key loads can be caused in limit conditions. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides a core distribution network analysis device considering key load power supply capacity, which can consider the quantitative evaluation analysis of the importance of substations of an urban power system according to the load importance level difference and the quantity proportion constraint of the substations of each voltage level during power system planning, provide reference data for subsequent planning and system construction, and compared with the existing research theory, the device has the capability of processing power systems of various voltage levels, can expand the planning range and quantitatively evaluate and analyze the substations of different levels in a larger space scale. The technical scheme for achieving the purpose is that the core power distribution network analysis device considering the key load power supply capacity comprises a data acquisition module, a voltage level identification unit, a load importance assessment engine, a transformer substation quantitative assessment model, a risk assessment decision support system and an electronic map integration module which are sequentially connected, wherein the risk assessment decision support system is connected with a report generator and a user interaction interface, and the key load power supply capacity analysis device comprises the following components: The power distribution network analysis planning method comprises the steps of automatically collecting real-time data of a power distribution network by a data acquisition module, intelligently classifying the power distribution network by a voltage grade identification unit to obtain a user type and a power supply area function, distributing weights for different load grades by a load importance assessment engine according to the user type and the power supply area function, calculating importance indexes of all substations by a substation quantitative assessment model according to information in the load importance assessment engine, simultaneously considering proportional constraints of the number of the substations, providing a power distribution network analysis planning scheme by a risk assessment decision support system according to the importance indexes of the substations and the proportional constraints of the number of the substations calculated by the substation quantitative assessment model, visualizing the power distribution network analysis planning scheme by an electronic map integration module, directly displaying the power distribution network analysis planning scheme result on a user interaction interface for visual understanding by an operator, and automatically compiling a corresponding power distribution network analysis planning report by a report generator. The core power distribution network analysis device considering the key load power supply capacity, wherein the power distribution network real-time data comprises voltage levels and load condi