Distribution network reliability estimation method considering prearranged stoppage
A distribution network and reliability technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problem of slow load growth, a large proportion of pre-arranged outages, and the block method cannot directly deal with the consideration of power distribution. network reliability assessment and other issues, to achieve the effect of good model versatility and easy popularization and application.
Active Publication Date: 2011-10-19
CHONGQING UNIV
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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 Sta
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[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0037] as attached figure 1 and figure 2 As shown, a distribution network reliability evaluation method that can consider pre-arranged outage, the specific steps are as follows:
[0038] (1) Input distribution network data:
[0039] Firstly, the structural data, electrical data and reliability data of the distribution network are input. The structural data of the distribution network, including the connection relationship of the lines in the distribution network and the connection relationship between the line and the transformer, the installation position of the circuit breaker, section switch, isolating switch, etc.; the electrical data of the distribution network, including the line And transformer resistance, reactance, load node transformer capacity, power factor, load rate, etc.; distribution network reliability parameters, ...
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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...
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Inventor 谢开贵胡博曹侃马怀冬王光强李春燕
Owner CHONGQING UNIV
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