考慮分布式電源接入的配網(wǎng)線損影響指標研究
劉若愚，楊勇，陳輝，林懷德
（廣東電網(wǎng)有限責(zé)任公司佛山供電局，廣東 佛山 528011）
摘 要：分布式電源（DG）并網(wǎng)對配網(wǎng)線損會造成重要影響，但目前仍缺乏成熟的量化分析指標。開展了比較系統(tǒng)的含分布式電源的配網(wǎng)線損指標體系研究，梳理了配網(wǎng)線損的內(nèi)部影響因素，將其分為線路基本屬性、運行參數(shù)及管理因素等三大類；分析了DG對配網(wǎng)內(nèi)部主要影響因素的影響，建立包含DG負荷需求、并網(wǎng)特點、運行方式及機組配置等四方面的外部影響指標體系，以指標高貢獻率與計算分析方便為原則從中篩選得到實用影響指標，并以此為基礎(chǔ)進行影響模式的具體理論分析；以某典型10 kV 配網(wǎng)模型為例，定量地分析DG在不同并網(wǎng)容量、并網(wǎng)位置和并網(wǎng)運行方式下對配網(wǎng)各部分線損的影響，所得結(jié)論可為DG的電網(wǎng)規(guī)劃及電網(wǎng)的降損規(guī)劃提供理論指導(dǎo)。
關(guān)鍵詞：分布式電源；配網(wǎng)線損；影響指標體系；實用影響指標
中圖分類號：TM727 文獻標識碼：A 文章編號：1007-3175(2018)01-0017-06
Research on Influence Indexes of Line Loss on Distribution Network Considering Distributed Generation
LIU Ruo-yu, YANG Yong, CHEN Hui, LIN Huai-de
（Foshan Power Supply Bureau, Guangdong Power Grid Corporation, Foshan 528011 , China）
Abstract: Distributed generation has a significant impact on line loss of the distribution network. However, there is still a lack of mature quantitative analysis index. This paper has carried out a systematic research on the distribution network line loss index system considering distributed generation of compared system. The internal factors influencing on the line loss were divided into three categories: basic attributes, operating parameters and management factors. This paper analyzed the DG impact on the main influence factors inside distribution network, established the external influence index system including DG load demand, grid connection characteristics, operation mode and unit configuration. Practical influence indexes were chosen on the basis of the higher contribution rate of index, as well as its easier analysis accessibility. On this basis, this paper carried out the concrete theoretical analysis of influence mode. Taking a typical 10 kV distribution model for example, this paper quantificationally analyzed the influence of DG on each part of line loss of the distribution network under the different grid connected capacity, location and operation mode. The conclusion can provide the theoretical guidance for DG grid planning and power loss planning.
Key words: distributed generation; distribution network line loss; influence index system; practical influence index
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