基于越限风险评估的分布式光伏电源接入配电网适应性研究

Research on adaptability for distributed PV generation connected to distribution network based risk evaluation with beyond limit

为合理评价现状配电网对规划分布式光伏电源的适应性,针对分布式光伏电源接入配电网引起的电压和潮流越限问题,讨论了典型接入配电网拓扑和接线模式,并在MATLAB/Simulink环境下建立了含分布式光伏电源模型的IEEE34标准节点配电网络系统.考虑到分布式光伏电源的随机出力扰动和负荷波动给配电网运行带来的风险,建立节点电压越限和支路潮流越限风险评估指标模型,分析了相同节点对不同容量电源的接纳能力,重点讨论了分布式光伏电源接入配电网准入容量.以配电网典型实际参数为例进行仿真实验,仿真结果验证了应用风险评估指标模型评估分布式电源接入配电网适应性的合理性.

In order to evaluate adaptability of distribution network with planned and distributed PV generation,aiming at questions of voltage and power flow beyond limit when distributed PV power supply connected to distribution network,typical distribution network topology structure and connection modes are both discussed in this paper.The standard node IEEE34 of distribution network system of distributed PV power model is established in Matlab/Simulink environment.Taking into account the risk brought by random output disturbance and load fluctuation of distributed PV power supply to the operation of distribution network,an index model of risk evaluation of node voltage and branch power flow beyond limit has been established.It is analyzed the capacity of the same node for different capacity power supply,and discussed mainly the access capacity of distributed PV power to distribution network,and carried out simulation experiments as well by taking the typical actual parameters of distribution network as an example.Our simulated results have verified validity of the evaluation adaptability of distribution network of the proposed method.