Distribution network reliability estimation method considering prearranged stoppage

Abstract

The invention provides a distribution network reliability estimation method considering prearranged stoppage. The method comprises the following steps: inputting the distribution network data to a computer system and calculating a power flow in a normal operation condition by a computer; then carrying out enumeration calculation on the stoppage event of each component in the distribution network by adopting a state enumeration method; calculating the impact on the reliability index of the distribution network from the prearranged stoppage based on a feeder; and finally calculating the reliability index of the distribution network and outputting the reliability index. The method provided by the invention creatively brings forwards two ways for prearranged stoppage of the distribution network, namely, component-based prearranged stoppage and feeder-based prearranged stoppage; and meanwhile, the method respectively gives the definitions of the reliability indexes and the calculation methods, the reliability indexes of the distribution network which only considers fault stoppage can be calculated, and the reliability indexes of the complex distribution network which considers the impact of the prearranged stoppage can also be calculated, so the deficiencies in the existing fault mode and consequence analysis method, the blocking method and the like can be overcome, and besides, the model has good generality and is convenient for popularization and application. The method provided by the invention can be widely applied to the reliability estimation of complex medium-voltage distribution networks, especially for the reliability estimation of 6-10KV distribution network.

Description

technical field [0001] The invention relates to a method for evaluating the reliability of a distribution network, that is, a method for evaluating the reliability index of a power system distribution network. The invention specifically relates to a distribution network reliability evaluation method that can consider pre-arranged outage. It belongs to the technical field of electrical engineering. Background technique [0002] The distribution network is the link that directly faces the users in the power system, and it has the most direct impact on the quality and reliability of the power supply of the users. The reliability evaluation of the distribution network is very important for improving the reliability of the distribution network, ensuring the quality of power, and reducing the network It is of great significance to reduce line loss, reduce system blackout loss, promote and improve power industry production technology and management, and improve economic and social...

AI Technical Summary

Problems solved by technology

However, the block method cannot directly deal with the distribution network reliability assessment considering pre-arranged storage and transportation.

[0006] In some developed countries such as the United States, Canada, Japan, etc., although their load growth is slow and the structure of the distribution network is relatively fixed, the proportion of pre-arranged outages is still larger than that of random outages

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