考虑网损的配电节点电价模型及迭代计算方法

Locational Marginal Pricing Model at Distribution-Node Considering Loss and Its Iterative Calculation Method

在分布式电源装机容量快速增长的背景下,建立本地电力市场可促进分布式机组出力的消纳和配电网的优化运行。文章提出了适用于本地市场竞价出清的配电节点电价(distribution locational marginal pricing,DLMP)模型,将其分解为有功价格分量、无功价格分量、网损价格分量、电压支撑价格分量以及阻塞价格分量,可量化各分量对节点电价的贡献。同时采用迭代算法对该模型进行求解,通过市场出清模型与交流潮流的迭代计算克服线性化节点电价模型对预设网损因子的依赖。通过对IEEE 33节点配电系统的仿真分析,验证了所提模型的有效性和所提算法的准确性。

With the rapid growth of distributed generation(DG),establishing a local power market will be a promising way to integrate DG and guarantee the optimal operation of distribution system. However,locational marginal pricing(LMP) for transmission network can’t be applied to distribution network directly. This paper proposes a distribution locational marginal pricing( DLMP) model to clear the local electricity market where DGs bid in pool. The DLMP is decomposed into five components: marginal energy cost for active power and reactive power,marginal loss cost,marginal voltage support cost and marginal congestion cost,which quantify the contribution of each part to the total nodal price.Meanwhile,an iterative solution method is designed to obtain the DLMPs with high precision. Through the iterative calculations of market clearing model and AC power flow,the results obtained can overcome the dependence on the preset parameters(e. g. network loss factor) based on the historical operation information. Finally,simulation results on the IEEE33-node distribution system demonstrate the effectiveness of the proposed model and accuracy of the proposed method.