【摘要】 针对光伏电源接入后对电网电压和无功潮流的影响,考虑光伏电源、静止无功发生器和补偿电容器等连续、离散控制变量,以降低配电网运行成本即降低电网运行时的网损、提高分布式电源并网能力、保证电压质量为目的,建立配电网电压和无功协同控制的多时段优化模型。考虑潮流方程、节点电压、并联电容器无功功率、分布式光伏电源输出功率等约束条件,采用二阶锥方法对目标函数和约束条件函数进行非线性处理,将具有多种不确定性变量和函数的优化模型转化为混合整数二阶锥模型,使得求解更为可行和有效。以某电网单馈线辐射式18节点的配电系统为实例进行仿真计算,验证了所提方法的可行性和适用性。更多还原

【Abstract】 Aiming at the influence of photovoltaic power supply on the voltage and reactive power flow of the power grid,considering the continuous and discrete control variables such as photovoltaic power supply,static var generator and compensation capacitor,in order to reduce the operation cost of distribution network,that is,to reduce the network loss during the operation of the power grid,improve the grid connection ability of the distributed power and ensure the voltage quality,a multi period optimization model of voltage and reactive power coordinated control in distribution network is established. Considering the constraints of power flow equation,node voltage,reactive power of shunt capacitor and output power of distributed photovoltaic power,the second-order cone method is used to deal with the objective function and constraint function nonlinearly,and the optimization model with various uncertain variables and functions is transformed into the hybrid integer second-order cone model,which makes the solution more feasible and effective. The feasibility and applicability of the proposed method are verified by the simulation of a single-feeder radiant distribution system with 18 nodes.更多还原