双馈变流器控制策略对风电场低电压穿越能力的影响研究

发布时间：2018-02-14 20:44

本文关键词： 风电机组无功电流风电场低电压穿越　出处：《电气应用》2014年23期 　论文类型：期刊论文

【摘要】：风电场低电压穿越能力与风电机组在故障期间的响应特性、风电场集电系统、无功补偿装置性能和接入电网条件等因素密切相关,其中故障期间单台风电机组的无功电流特性尤为重要。为了分析故障过程中风电机组无功电流特性对风电场稳定性的影响,基于通过验证的风电机组模型,在电力系统仿真软件DIgSILENT/PowerFactory中搭建了100 MW风电场的详细模型,包括风电机组、箱式变电站、场内馈线、主变压器、无功补偿装置和送出线路等。在不同电网强度下,对比分析风电机组在故障过程中具备吸无功、发无功不同特性时,风电场在故障过程中的电压分布、并网点有功和无功的暂态特性。研究结果表明,风电机组具备灵活的无功电流调节能力对风电场故障穿越能力的实现至关重要。
[Abstract]:The low voltage traversing capacity of wind farm is closely related to the response characteristics of wind turbine during failure, the power collecting system of wind farm, the performance of reactive power compensator and the condition of connecting to the power network, etc. In order to analyze the influence of reactive current characteristics of wind turbine on the stability of wind farm during the fault period, the model of wind turbine is used to analyze the influence of reactive current characteristics of wind turbine on the stability of wind farm. A detailed model of 100MW wind farm is built in the power system simulation software DIgSILENT/PowerFactory, including wind turbine, box substation, in-field feeder, main transformer, reactive power compensation device and power supply line. When wind turbine has different characteristics of reactive power and reactive power in fault process, the voltage distribution of wind farm in fault process, and the transient characteristics of active and reactive power of wind farm are analyzed. The results show that, when the wind turbine has different characteristics of reactive power and absorbing reactive power, the distribution of voltage and the transient characteristics of active and reactive power are analyzed. The flexible reactive current regulation ability of wind turbine is very important to the realization of wind farm fault traversing ability.
【作者单位】：中国电力科学研究院;
【基金】：国家能源应用技术研究及工程示范项目(NY20110408-1)
【分类号】：TM46

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