兆瓦级风机接入10kV馈线的兼容性分析与主动适应性控制

项目名称： 兆瓦级风机接入10kV馈线的兼容性分析与主动适应性控制

项目编号： No.51467003

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 电工技术

项目作者： 郝正航

作者单位： 贵州大学

项目金额： 49万元

中文摘要： 兆瓦级风机接入10kV馈线属于分布式风电接入模式，在10kV馈线上接入兆瓦级风机存在较多兼容性难题。10kV馈线易出现三相不平衡、谐波、电压跌落和电压骤升等异常现象，这些现象严重威胁并网风机的安全运行，同时10kV线路继电保护与并网风机的配合技术尚有缺陷，风机和配电网协调性差。本项目分别从风机角度和配网角度分析二者的兼容性，提出双馈风机主动适应非理想环境的控制思想并开展以下研究：①10kV非理想馈电系统中并网风机的行为特点；②兆瓦级风机接入10kV馈线条件下的电压调节方法；③兆瓦级风机与10kV馈线保护系统的兼容性与协调机制；④含兆瓦级风机的10kV馈线孤岛稳定运行技术；⑤开发系统解决方案的半实物验证与试验平台。本课题研究成果可解决兆瓦级风机接入非理想10kV馈线的电能质量、可靠性和系统整体稳定性等问题，同时在试验技术上发明一套可有效验证风机并网核心环节的半实物试验平台。

中文关键词： 分布式电源；电力系统仿真；电力系统稳定；电能质量；风电并网

英文摘要： Megawatt wind turbines connected to 10kV feeder is a kind of distributed wind power generation mode. It faces many compatibility problems to directly access to megawatt wind turbines on 10kV feeder. 10kV feeder prone to have three-phase imbalance, harmonic, voltage drop, voltage surge and other extreme circumstance, which are serious threats to the safe operation of the grid wind turbines. At the same time, currently the cooperation technology still has defects of 10kV feeder's protection, automatic reclosing device and the grid wind turbines, besides the poor coordination with the wind turbines and distribution. To solve these problems, based on active control idea we carry out the following researches: (1) the stability behavior of 10kV non-ideal distribution system in the grid wind turbines; (2) the voltage regulation methods of megawatt wind turbines connected to 10kV feeder; (3) the compatibility and coordination mechanism of the protection system of megawatt wind turbines and 10kV feeder fan; (4) the stable operation technology of megawatt wind turbines connected to 10kV feeder (5) the development of semi-physical verification and experimental platform of the system solution. The research of this topic theoretically solves the problems of power quality of megawatt wind turbines connected to 10kV feeder and reliability and overall stability of the system, at the same time invents semi-physical experimental platform on the condition of testing technique which can effectively verify the central part of grip wind turbines.

英文关键词： distributed generation;power system simulation;power system stability;power quality;wind power integration