分布式光伏并网系统运行中存在的问题.docxVIP

建筑电气 BUILDING 2 0 1 4 年 第 1 1 期 ELECTRICITY 分布式光伏并网系统运行中存在的问题 李英姿 (北京建筑大学电气与信息工程学院，北京市 100044) Exi sting Problems during Operation of Distributed Photovoltaic Grid-connected System LI Yingzi (School of Information and Electrical Engineering of Beijing University of Civil Engineering and Architecture,Beijing 100044,China) Abstract: Building integrated photovoltaic (BIPV) has been winning more and more attention as a form of existence of distributed PV power plant. Distributed PV system, after being connected to the distribution network, has changed the structure of traditional power grid from the previous passive power grid to active power grid. Because of the intermittency, instability, etc. of the electric energy exported from the PV generating system, the PV grid-connected system must impact the power quality, load flow distribution, short-circuit current, protection coordination, islanding effect,PV countercurrent,etc. of the connected power grid to various degrees. Improvement measures and specific technical requirements have been proposed for existing problems during the operation of distributed PV grid- connected system based on the requirements of Typical Design of Distributed Generation Connecting System issued by SGCC. Key words: PV connecting system; building integrated photovoltaic; power quality; load flow calculation; short-circuit current; protector; islanding effect; reverse power 摘 要： 光伏建筑一体化作为分布式光伏电站的 一种存在形式，越来越受到关注。分布式光伏系统接 入配电网运营后，改变了传统电网的结构，从过去的 无源电网转变为有源电网。由于光伏发电系统输出的 电能具有间歇性、不稳定性等特点，必然会对所接入 配电网的电能质量、潮流分布、短路电流、保护协 调、孤岛效应、光伏逆流等方面产生不同程度的影响。 根据国家电网公司颁布的《分布式电源接入系统典型 设计》的要求，针对分布式光伏并网系统运行中存在 的问题，提出了改进措施和具体的技术要求。 关键词： 光伏接入系统；光伏建筑一体化；电能 质量；潮流计算；短路电流；保护装置；孤岛效应； 逆功率 中图分类号： TM615 文献标识码： A 0 引言 根据国家能源局必威体育精装版公布数据，2013年光伏电 站新增装机容量12.1GW, 分布