摘要
提出了一种基于电压源换流器的直流输电系统的交流、直流混合风力发电场并网技术。分析了风力发电机的变桨距控制原理和电压源换流器的直流输电系统的控制策略,讨论了并网风电系统的潮流控制,建立了基于PSCAD/EMTDC的风力发电场模型、电压源换流器的直流输电系统模型以及控制系统模型,研究了风力发电场输出功率变化条件下,整个并网系统的动态响应。理论分析和仿真结果表明,电压源换流器的直流输电系统风力发电场并网系统能够解决并网风力发电场对本地电网稳定安全性、电能质量方面的影响,还能够提高并网风力发电场的输送容量,更加方便地实现对风电潮流的控制。
The AC/DC hybrid wind farm integration technology based on HVDC of voltage source converter （VSC） was presented. The pitch control principle of wind turbine and control strategies of VSC-HVDC, and the power flow control of integrated wind farm were also discussed. The simulation model of wind farm composed of five fixed speed and fixed frequency wind turbine generator, the simulation model of VSC-HVDC and relative control were setup by PSCAD/EMTDC. Simulation results and academic analysis show that VSC-HVDC is an ideal measure to solve the problems of power quality and system instability due to large wind farm integration, to feasibly control wind farm power flow.
出处
《中国电力》
CSCD
北大核心
2006年第9期45-49,共5页
Electric Power
