Power distribution network health state analyzing method based on traveling wave electrical quantities

Abstract

The invention relates to a power distribution network health state analyzing method based on traveling wave electrical quantities. The method includes the steps of determining the range of the monitoring area of a power distribution network to ensure that outgoing lines of a main feed line in the network are each provided with a traveling wave detecting device, a working frequency information detecting device and a communication device; collecting the traveling wave electrical quantities and the working frequency electrical quantities on a distribution line in real time; judging whether traveling wave disturbance happens to the monitoring area or not according to the traveling wave electrical quantities, and analyzing whether the traveling wave disturbance is caused by failures of an electrical system in the monitoring area or not; if yes, showing that the electrical system in the monitoring area fails and is in an unhealthy state; if not, determining a traveling wave disturbance source with the aid of a DMS system, a power grid weather information system and a geographic information system; analyzing the performance state of the electrical system according to the traveling wave disturbance source, providing important information for the device management strategy and power grid risk control, and finally obtaining the power distribution network health state analyzing result. On the basis of ensuring the safety and reliability of the power distribution network, the running efficiency of the power distribution network is improved, and operating and maintaining expenses are reduced.

Description

technical field [0001] The invention belongs to the technical field of distribution network state evaluation and fault detection, and in particular relates to a distribution network health state analysis method based on traveling wave electrical quantities. Background technique [0002] In recent years, the research and construction of smart grid has been a hot topic nowadays. As an important part of the smart grid, the intelligence of the distribution network has become a new trend in the development of the future power grid, and plays a decisive role in realizing the overall goal of the smart grid construction. Therefore, a set of scientific, reasonable, comprehensive and accurate distribution network status evaluation methods should be constructed to realize the analysis of the smart distribution network status and provide guidance and assistance for the operation, maintenance, transformation and management of the distribution network. [0003] The complexity, discretene...

AI Technical Summary

Problems solved by technology

In such evaluation methods, the selection of indicators generally follows the requirements of systematicness, scientificity, independence, adaptability and comparability, making it too focused on establishing an indicator system and ignoring the research on computational evaluation methods; at the same time, the indicators involved Some are difficult to calculate and obtain, or are only used for research; it is difficult to collect on-site engineering, and it is difficult to guarantee the rationality of the division of relevant links in the distribution network

Therefore, the accuracy of the evaluation results of the existing evaluation methods for the distribution network health state is difficult to measure and the application value is not obvious, specifically including: the existing state monitoring technology, because there are too many monitoring targets, some projects that have already been put into operation are reinstalled The monitoring tools are difficult, the optimization process is complicated, and the accuracy of the evaluation results is questionable. There is an urgent need for more scientific and rigorous methods to analyze the health status of the distribution network

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