新能源配电网多运行指标协同的灵敏性分析方法

Sensitivity Analysis Method for Multiple Operational Index Coordination of Distribution Network with Renewable Energy

配电网电压和网损指标协同控制一直受到高度重视。在新能源环境下,配电网电压和网损指标协同控制的难度更大并更具挑战性。根据配电网中各个物理量之间的变化关系与交互作用特性,将物理量分为独立参数变量、状态变量和控制变量3种类型,建立配电网在新能源环境下电压和网损运行指标,构建针对分布式电源和传统无功补偿装置的配电网潮流分布、节点电压和网损的灵敏度矩阵。以局部电压稳定指标作为分布式电源接入电网后电压和无功分布的技术指标,以分布式电源的投资和运行维护成本作为经济指标,分析分布式电源大规模接入电网后对电压和网损造成的影响。以IEEE 30系统为实例,通过仿真计算对所建的模型和算法进行了验证。

Collaborative control of voltage and loss indices in distribution network has always been an important work and has been highly valued.In the renewable energy environment,the coordinated control of voltage and loss index in distribution network is more difficult and challenging.According to the changing relationship and interaction characteristics of each physical quantity in distribution network,physical quantity are divided into three types:independent parameter variable,state variable and control variable,voltage and loss operation index of distribution network under new energy environment is established,and the sensitivity matrix for power flow distribution,node voltage and loss of distribution network is constructed for distributed generation and traditional reactive power compensation devices.Taking the local voltage stability index as the technical index,and the investment and operation and maintenance cost of the distributed generation as the economic index,the impact of large-scale distributed generation on the voltage and power loss is analyzed.The simulation results of an example of the IEEE 30 system verify the applicability and feasibility of the proposed method.