考虑微电网接入下的配电网优化规划

在能源紧缺、污染严重的时代背景下,分布式电源迅速普及。含分布式电源的配电网规划研究日益增多,而将分布式电源以微电网的形式考虑到配电网规划之中还鲜有研究。将不同类型的分布式电源、储能装置以微电网的形式接入配电网,充分考虑微电网加入对变电站规划和网架规划产生的影响。基于微电网系统模型,分别建立配电网规划中变电站选址定容模型及网架规划模型,利用改进粒子群算法求解上述两个多目标非线性化模型,并计算由微电网带来的变电站容量削减量及配电网故障时的可避免停电损失费用。以IEEE50节点为算例验证此模型,算例验证了所提模型有利于提高系统的可靠性和经济性,优化了网架结构,具有实际工程参考意义。

Optimal planning of distribution network with microgrid

Under the background of energy shortage and severe pollution, the distributed generations spread rapidly. The study which is the planning of distribution network with distributed generations is also increasing. However, littleSresearchShas been done intoSthe study that is the planning of distribution network with distributed generations which are in the form of microgrid. In this paper, different types of distributed generations and energy storing device are connected to the distribution network in the form of microgrid. And the influence which is created as the microgrid joins on the planning of substation and the network is fully considered. Model of substation locating and sizing and network planning is respectively established based on model of microgrid system. The foregoing multiobjective nonlinear models are solved by using the improved particle swarm optimization. In addition, the reduction of substation capacity and the interruption cost which can be avoided during the fault of distribution network that are both caused by microgrid are calculated. Finally, IEEE50 example is used to verify that the proposed model is in favor of improving the reliability and economy of the system. And it is also good for structure of the network. The model in this paper has practical engineering significance.