Active distribution network safety effectiveness evaluation method

Abstract

The invention discloses an active distribution network safety effectiveness evaluation method comprises steps of firstly obtaining the average response rate and the firewall filtering probability distribution among the nodes of an active distribution network; secondly, calculating a system reliability function according to an active distribution network model; then, obtaining the active total loadof power nodes and the load loss of the attacked power nodes by an active distribution network monitoring device; then obtaining an active distribution network stability factor parameter; and finally, combining the reliability function at the network side of a physical information fusion system with a loss load stabilizing factor at the power side to form a comprehensive index capable of evaluating the safety effectiveness of the entire active distribution network. The method evaluates the influence of disturbance and malicious attack in the power physical fusion system on the active distribution network, and considers the influence of the network-side factor on the power side in the fusion system. The method can be widely applied to the safety effectiveness analysis of the active distribution network system.

Description

technical field [0001] The invention relates to the technical field of active distribution networks, in particular to a safety performance evaluation method for active distribution networks. Background technique [0002] CPS (Cyber-Physical Systems) is a new complex system formed by the deep integration of multiple information networks and traditional physical systems with the continuous development of information technology. Specifically, CPS is a new fusion system that integrates computer technology, large-scale communication network technology, large-scale sensor network technology, system control technology and traditional physical systems. In a large-scale interconnected system, CPS should be able to perform real-time monitoring, analysis, simulation and control, so that the entire system has flexibility, high efficiency and high reliability. The CPS system is of great significance to the national economy and social development. Our country attaches great importance to...

AI Technical Summary

Problems solved by technology

In the smart grid CPS, the failure of the secondary equipment will affect the dispatcher's accurate perception of the primary power system; and when the primary system fails, if the communication transmission of the secondary system such as data acquisition and monitoring (SCADA) is maliciously attacked and the fault occurs , when there is information delay or interruption, it will cause the power equipment to malfunction, and in severe cases, it will directly exit the operation, causing the entire power system to oscillate

A typical case of cyber attack is the blackout in Ukraine. Malicious codes attacked the substation monitoring system, causing failure of power generation equipment and causing a large-scale power outage in Ukraine.

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