用于无功补偿的海上风电场等值模型  

Equivalent Model of Offshore Wind Farms Used for Reactive Power Compensation

作　　者：陈澜[1] 杨苹[2] 周少雄[3] 尹旭[2] 

机构地区：[1]中国能源建设集团广东省电力设计研究院,广州市510663 [2]广东省绿色能源技术重点实验室(华南理工大学),广州市510641 [3]风电控制与并网技术国家地方联合工程实验室(华南理工大学),广州市510641

出　　处：《电力建设》2014年第7期126-130,共5页Electric Power Construction

基　　金：国家高技术研究发展计划项目(863计划)(2012AA050201);国家自然科学基金项目(61273172);广东省战略性新兴产业核心技术攻关项目(2012A032300013)

摘　　要：基于单台风机动态模型组成的整风场传统动态模型是一个高阶模型,难以进行功率传输数据的处理和无功补偿容量的计算,为此提出了一种新型的适用于无功补偿的海上风电场等值建模方案。根据国家标准GB/T 19963—2011《风电场接入电力系统技术规定》的要求,结合海上风电系统的运行特点,将风电机组等效为电流可控的恒压功率源,考虑变压器的无功损耗是关于视在功率的线性系统对多机系统中变压器做叠加等值,根据实际风电场与等效风电场的功率传输特性相同的原则将集电系统等值为单条支路,建立适用于无功补偿方案设计的海上风电场的等值模型,并对一个具体的海上风电场进行PSCAD仿真分析,结果表明所建立的海上风电场等值模型是可行的,与传统海上风电场动态模型相比,该等值建模方案简单实用,适用于海上风电场无功补偿。The traditional dynamic model of wind farm based on single turbine dynamic model was a high order model, which was difficult to process the data of power transmission and calculate the capacity of reactive power compensation, so this paper proposed a new kind of equivalent modeling scheme of offshore wind farm for reactive power compensation. Based on the requirements of the national standard ＂technical rule for connecting wind farm to power system＂ （GB/T 19963 -2011 ）, combined with the operational features of offshore wind farm systems, the wind turbines could be equivalent to current controlled voltage sources, the power transformer in multi generator system with reactive power loss of transformer was considered as a linear system, and the collection system was equivalent to a single branch according to the principle that the power transfer characteristics of the equivalent wind farms were the same as the real wind farms, Then, this paper established the model of offshore wind farm systems for reactive power compensation, and analyzed a specific offshore wind farm with simulation software PSCAD. The results verify the feasibility of equivalent model of offshore wind farm, which is simpler and more practical than the traditional dynamic model of offshore wind farm, and suitable for the design scheme of reactive power compensation for offshore wind farm.

关 键 词：海上风电场 无功补偿 建模 等值模型 

分 类 号：TM614[电气工程—电力系统及自动化]