PDF(2268 KB)
Distribution Network Planning Method Considering Flexibility Resource Attribute of Microgrids
XU Jiayin, WANG Tao, WANG Jiaqing, LIU Chen, MA Yinghao
Electric Power Construction ›› 2022, Vol. 43 ›› Issue (6) : 84-92.
PDF(2268 KB)
PDF(2268 KB)
Distribution Network Planning Method Considering Flexibility Resource Attribute of Microgrids
Aiming at the distribution network with microgrid, a distribution network planning method considering the flexibility resource attribute of microgrids is proposed. The flexibility resource attribute of microgrids is considered from substation planning and grid planning. Firstly, the mathematical models of flexible resources in microgrids are established and then the external equivalent model of microgrids is formed. Then, the flexibility resources are considered by updating the constant volume formula and adding constraints in network planning. Finally, a distribution network programming model with minimum investment and operating cost as the objective function is established and it is solved by improved genetic algorithm. Case study is designed according to the area to be planned with three microgrids. The results show that the planning method proposed in the paper can improve the system transmission flexibility with a small increase in cost, so when the distributed power supply fluctuates or the load forecast is inaccurate during the operation of the distribution network in the future, the line will have enough flexibility for the main network or the microgrid to transmit power, which proves the rationality and effectiveness of the proposed model.
microgrid / flexibility resource / substation planning / network planning / improved genetic algorithm / distribution network flexibility
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