随着中国分布式光伏渗透率不断提高,其对配电网谐波的影响也越发严重.通过研究系统中谐波监测点的最佳配置,并以对谐波监测点处谐波影响最小为目标提出了多节点的分布式光伏配置方法,从而降低分布式光伏对配电网谐波影响.首先根据单节点接入分布式光伏发电(Distributed Photovoltaic Generation, DG)达到极限时全网其余各节点是否可观测到该节点产生的谐波,定义了谐波监测范围,进而利用敏感因子法以监测点数量少和监测范围全覆盖为目标,计算了谐波监测点的最佳配置方案.此后,以监测点谐波含量最少及系统光伏最大消纳为目标,使用粒子群算法计算得到了分布式光伏配置方案.通过上海某配电系统算例,验证了方案的有效性.%With the increasing penetration of distributed PV generation, its influence on harmonic of distribution network is becoming more and more serious. The optimal configuration of harmonic monitoring program is studied, and a multi node distributed photovoltaic allocation method is proposed to minimize harmonic contents of harmonic monitoring points, which reduces the influence of distributed PV on the harmonic of distribution network. First, the Monitor Reach Area (MRA) is defined according to the result whether the monitor point can observe harmonics generated by the single DG node when its capacity get to the penetration limit. Then the optimal monitor point configuration is calculated with the purpose of getting the less monitor point number and the larger MRAs. At last, a distributed PV configuration scheme is proposed using particle swarm optimization algorithm to reduce the PV harmonic and get the maximum PV penetration in the system. The performance of the scheme is illustrated in a distribution network in Shanghai, and the result implies the effectiveness of the method proposed.
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