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Dynamic reconstruction method considering distributed power supply and soft switch access for power distribution network

A technology of distributed power supply and dynamic reconfiguration, which is applied to AC networks with the same frequency from different sources, circuit devices, genetic rules, etc., and can solve the problems of not fully considering the dynamic reconfiguration of smart distribution networks

Inactive Publication Date: 2018-05-01
国网宁夏电力有限公司经济技术研究院
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Problems solved by technology

Most studies only considered one or two aspects of distributed power generation, intelligent soft switching or dynamic reconfiguration when considering distribution network reconfiguration, and did not fully consider the coexistence of distributed power generation and intelligent soft switching in the research. Dynamic Reconfiguration of Smart Distribution Network

Method used

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  • Dynamic reconstruction method considering distributed power supply and soft switch access for power distribution network
  • Dynamic reconstruction method considering distributed power supply and soft switch access for power distribution network
  • Dynamic reconstruction method considering distributed power supply and soft switch access for power distribution network

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specific example

[0191] An example of IEEE16 node distribution network with distributed power supply is used to verify the effect of distributed power supply and intelligent soft switch and the effectiveness of the method of the present invention. In the algorithm of the present invention, a coding strategy based on a loop is adopted, such as figure 2 shown. One branch switch is selected in each loop, and the three loop switches constitute the initial chromosome, which is the candidate chromosome. By canceling the encoding setting of the common branch switch, the calculation is greatly simplified and has no effect on the optimal solution. The set of switches contained in loop 1 is {12,15,19,18}; the set of switches contained in loop 2 is {17,21,24}; the set of switches contained in loop 3 is {13,14,26,25 ,twenty three}.

[0192] The voltage of the root node of the IEEE16 node distribution network power supply is 10.5kV, and the rated line voltage is 10.0kV. Among them, 1, 2, and 3 are pow...

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Abstract

A dynamic reconstruction method considering distributed power supply and soft switch access for a power distribution network comprises the steps of building a source-load stochastic model, and performing stochastic power flow analysis on the power distribution network, wherein source-load stochastic model comprises a wind power generation system stochastic model, a solar photovoltaic power generation system stochastic model and a load stochastic model, and the stochastic power flow analysis of the power distribution network is based on a cumulant method; building an intelligent soft switch running model and a dynamic network reconstruction model, wherein the intelligent soft switch running model is expressed by capacity constraint of an intelligent soft switch converter, and the dynamic network reconstruction mathematical model comprises a target function and a constraint condition; and solving the built models by employing a genetic algorithm. The network reconstruction problem of thepower distribution network containing a distributed power supply and an intelligent soft switch is solved, a load among feeders of the power distribution network is balanced, the integral power flowdistribution of the system is improved, the overload is eliminated, the voltage level is improved, the electric energy quality and the power supply reliability are improved, the network loss is effectively reduced, and the running economy of the power distribution network is improved.

Description

technical field [0001] The invention relates to a dynamic reconfiguration method of a distribution network. In particular, it relates to a dynamic reconfiguration method of distribution network considering distributed power supply and soft switch access. Background technique [0002] As the last link of electric energy from production to users, distribution network plays an extremely important role in the power system. Distribution network reconfiguration only needs to change the state of tie switches or section switches in the network, and can achieve the purpose of reducing network loss, improving reliability, economy and power supply efficiency without increasing other investments. The load of the actual distribution system changes dynamically with time, so the study of the dynamic reconfiguration model of the distribution network within a period of time is more in line with the operation of the actual distribution network, and has guiding significance for the safe, high...

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Application Information

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IPC IPC(8): H02J3/06G06F17/50G06N3/12
CPCG06N3/126G06F30/367G06F2111/10H02J3/06H02J2203/20Y02E40/70Y04S10/50
Inventor 宫建锋刘洪董晓晶曹雨晨王诚良刘梦怡康健杨文华屈高强党东升周宗川李艾玲齐彩娟田星黄宗宏冯雪赵亮陈丹田宏梁葛鹏江李均超张辰雍浩
Owner 国网宁夏电力有限公司经济技术研究院
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