考虑分布式电源时序特性的配电网节能潜力评估

Energy Saving Potential Assessment of Distribution Network with Consideration of Timing Characteristics of Distributed Generation

除了满足负荷用电量需求外,节能与优质也是配电网改造与建设方案制定的重要目标。考虑到分布式电源及负荷具有明显的随机特性和时序特性,提出了一种考虑负荷及分布式电源时序特性的配电网综合节能潜力评估方法。所提方法首先构建具有气象和地理相关性的"分布式电源-负荷"联合概率场景;以网损改善率、电压质量改善率、经济效益多个指标作为节能规划的综合目标,对配电网进行综合节能潜力评估和改造方案优选,以期实现节能、电压质量和经济效益之间的最优平衡。以IEEE33系统为例,采用所提方法对更换高损变压器、更换导线、投入无功补偿装置和调整母线电压等节能改造措施进行仿真分析,结果表明所提方法的有效性和可行性。

In addition to meeting the demand of load power consumption, energy saving and high quality are also important targets in the formulation of power distribution network reconstruction and construction scheme. Considering the obvious random characteristics and timing characteristics of distributed generation and load, a distribution network comprehensive energy saving potential （ESP） evaluation method which considers timing characteristics of load and distributed generation is proposed. Firstly, the proposed method constructs a ＂distribution network - load＂ joint probabilistic scenarios with meteorological and geographical correlation. Then, multiple indexes including the improvement rate of loss reduction, the improvement rate of voltage quality and the economic benefits are taken as the integrated target of energy saving planning to evaluate the comprehensive energy saving potential of distribution network and to optimize the modification scheme in order to achieve the optimum balance among energy saving, voltage quality and economic benefits. The IEEE33-bus system is taken as an example, in which the proposed method is used to simulate and analyze energy saving modification measures including the replacement of high loss transformer, the replacement of conductor, the putting into operation of reactive power compensation device and the adjustment of bus voltage. Results show that he proposed method is effective and feasible.