【摘要】 在保证光伏电源有功出力最大的情况下,将光伏逆变器的剩余容量作为连续可调的无功电源研究了含光伏电源的配电网无功优化问题。在分析光伏发电出力随机性和不确定性的基础上,建立了光伏电源出力的概率分布模型,并以配电网有功网损和总电压偏差之和最小为目标函数,建立了考虑光伏逆变器剩余容量的配电网无功优化模型,采用线性递减权重粒子群算法(Lin WPSO)对离散变量进行处理,并寻求无功优化最优解。通过IEEE33节点系统算例仿真,验证了本文所提出的模型和方法更接近实际,可以有效降低配电网总电压偏差,改善配电网电压水平,降低配电网有功网损,验证了本文模型和方法的正确性和有效性。更多还原

【Abstract】 To ensure the maximum active power output of photovoltaic power,the reactive power optimization problem in distribution power system with photovoltaic power is discussed considering the residual capacity of photovoltaic inverter as continuously adjustable reactive power. Based on the analysis of the randomness and uncertainty of PV generation,the probability distribution model of PV power output is established. The objective function is to minimize the sum of active power loss and total voltage deviation in the distribution network,and a reactive power optimization model of distribution network with photovoltaic power is established. The linear decreasing weight particle swarm optimization algorithm( Lin WPSO) is adopted to deal with the discrete variables and the reactive power optimization optimal solution is found. The example of IEEE33 node system shows that the model and method proposed in this paper are more close to the real condition,and can effectively reduce the total voltage deviation of distribution network. The distribution network voltage level is improved,and the active power loss of the distribution network is reduced. The correctness and validity of the model and method are verified.更多还原