A method and device for identifying vulnerable areas of distribution network voltage

An identification method and technology of distribution network, applied in the direction of measuring current/voltage, measuring device, measuring resistance/reactance/impedance, etc., can solve the problems of large workload and low applicability in the load voltage sag domain, and avoid blindness. The effect of repetitive calculation work and good practicality
CN110672951BActive Publication Date: 2021-08-03国网电力科学研究院武汉能效测评有限公司 +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
国网电力科学研究院武汉能效测评有限公司
Publication Date
2021-08-03

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Abstract

The invention relates to a method and device for identifying vulnerable areas of distribution network voltage, and proposes a busbar sag identification vector and a line voltage sag correlation vector to quickly determine which lines of the distribution network have critical points, and based on this, proposes a method for determining which lines have critical points. The number of critical points is used to obtain higher calculation efficiency; on the basis of accurately obtaining the sensitive load voltage sag domain, the concept of bus voltage sag influence degree and line voltage sag influence degree is proposed, and the distribution network fault is considered The vulnerable areas of the distribution network are identified based on multiple factors such as type distribution probability, line and bus failure probability, and sensitive load tolerance characteristics.
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Description

technical field

[0001] The present invention relates to the technical field of distribution network protection and control, and more specifically, to a method and device for identifying voltage vulnerable regions of a distribution network. Background technique

[0002] As the most important power quality problem, voltage sag is the main factor that seriously affects the reliability of distribution network power supply, especially causing huge economic losses and waste of resources to modern park manufacturing enterprises. Statistics from the Lawrence Berkeley National Laboratory in the United States show that the economic losses caused by power interruptions to American power users are close to 80 billion U.S. dollars every year. The survey results of the EU Leonardo Power Quality Working Group show that the annual economic losses caused by voltage sags and power interruptions in the 25 EU member states are as high as 93 billion euros. Voltage sag has brought serious econom...

Claims

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