摘要
随着分布式光伏电站的大规模应用,光伏引入带来的一系列问题日益凸显,为满足光伏接入地区并网电压稳定的需求,提出了一种计及光伏电站无功出力的电压控制策略。考虑了接入系统对电压的影响和光伏电站的输出功率特性,提出了补偿点对系统电压支撑能力的指标,对补偿点的电压支撑能力进行评估。利用改进的灵敏度-模块度函数进行分区,同时按照电压支撑能力强弱的顺序,对区内电压进行无功补偿。该方法不仅充分利用光伏接入系统中每台设备的无功调节能力,还避免了各装置间的频繁动作,减少了不必要的设备损耗。仿真结果验证了所提策略的有效性。
With the large-scale application of distributed photovoltaic power station,a series of problems caused by the introduction of photovoltaic become increasingly prominent.In order to meet the demand of grid connected voltage stability in photovoltaic access area,a voltage control strategy considering the reactive power output of photovoltaic power station is proposed.Considering the influence of the access system on the voltage and the output power characteristics of the photovoltaic power station,the index of the voltage support ability of the compensation point to the system is proposed,and the voltage support ability of the compensation point is evaluated.At the same time,according to the order of voltage support ability,reactive power compensation is carried out for the voltage in the area.This method not only makes full use of the reactive power regulation ability of each device in the photovoltaic access system,but also avoids the frequent action among devices and reduces unnecessary equipment loss.The effectiveness of the proposed strategy is verified by simulation results.
作者
李赫
谭为先
王振浩
LI He;TAN Weixian;WANG Zhenhao(Tongliao Power Supply Company of State Grid Inner Mongolia East Power Company,Tongliao 028000,China;Northeast Electric Power University,Jilin 132012,China)
出处
《电工技术》
2022年第8期56-61,82,共7页
Electric Engineering
基金
国网内蒙古东部电力有限公司项目(编号SGMDTLO0YWJS2000669)。
关键词
光伏并网
无功电压控制
电压支撑能力
无功/电压灵敏度
photovoltaic grid
reactive power and voltage control
voltage support capability
reactive power/voltage sensitivity
作者简介
李赫(1986-),高级工程师,从事输变电设备运行与管理工作;谭为先(1997-),硕士研究生,研究方向为高比例新能源无功电压控制;王振浩(1964-),教授,研究方向为输变电设备运行状态监测与诊断、电能质量综合治理技术等。
