基于储能装置的柔性直流输电技术提高大规模风电系统稳定运行能力的研究  

Enhancement of the stable operation ability of large-scale wind power system based on the VSC-HVDC embedded in energy storage apparatus

作　　者：饶成诚[1,2] 王海云[1] 王维庆[1] 夏哲辉 吴寒[1] 

机构地区：[1]教育部可再生能源发电与并网控制工程技术研究中心(新疆大学电气工程学院),新疆乌鲁木齐830047 [2]国网湖南省电力公司检修公司,湖南长沙410004 [3]国网湖南省电力公司,湖南长沙410007

出　　处：《电力系统保护与控制》2014年第4期1-7,共7页Power System Protection and Control

基　　金：国家自然科学基金项目(51267017);新疆研究生科研创新项目(XJGRI2013035);自治区高技术项目(201132116)~~

摘　　要：大规模风电集中接入电网对直流输电技术提出了更高的要求。为此,提出了基于储能装置的柔性直流输电并网传输系统拓扑结构。根据dq同步旋转坐标系下VSC-HVDC(Voltage Source Converter HVDC)系统的数学模型,设计了相应的换流器直接电流控制策略。其中送端换流站解耦控制器实现了风电场输出有功功率和无功功率的独立控制,受端换流站采用将储能装置充放电功率偏差值作为直流电压控制器附加信号的控制策略。最后,以配备双馈风电机组的风电场经柔性直流输电系统接入电网进行仿真分析,针对风电场在噪声风引起的输电功率波动、受端换流站侧交流系统短路故障等情况进行仿真验证,结果表明该控制方案有效可行。Rigorous transmission technology is important when large-scale wind farm is connected to the power grid. Hence, a power transmission topological framework based on energy storage apparatus is proposed. The mathematical model is built in the dq synchronous frame, and the related direct current control strategy of converter is designed. The active and reactive power of wind farm is decoupled through the sending-end VSC controller, and the charge/discharge deviation power of energy storage apparatus is treated as an auxiliary signal for the DC bus voltage control strategy. The doubly fed induction generator wind farm with VSC-HVDC system is analyzed. Ultimately, the conditions of power fluctuation caused by noise wind and the short-circuit fault at the receiving-end VSC AC bus are simulated. The control scheme is proved to be feasible.

关 键 词：柔性直流输电 直接电流控制 双馈风电机组 储能装置 附加信号 

分 类 号：TM614[电气工程—电力系统及自动化]