CAJ | 학술논문

对双馈风电机组运行及并网技术等方面进行了研究，针对电网电压波动时，有源Crowbar技术在风电并网中的应用进行了深入的分析。通过针对主动式和被动式两种电路结构和控制方式的建模仿真和90 kW双馈电机实验系统，得出主动式Crowbar电路比较适合我国风电并网技术。然后利用理论研究和软件仿真，得出有源Crowbar 保护电路的相关参数。研究技术最终应用与东北某风厂，单机3 MW风机并网系统。通过现场结论分析，得出双馈风电机组并网时，采用有源Crowbar保护电路可以解决电网电压波动时造成的电机过电流和变流器直流侧过电压问题，使双馈风电机组完成低电压穿越运行。
대쌍궤풍전궤조운행급병망기술등방면진행료연구，침대전망전압파동시，유원Crowbar기술재풍전병망중적응용진행료심입적분석。통과침대주동식화피동식량충전로결구화공제방식적건모방진화90 kW쌍궤전궤실험계통，득출주동식Crowbar전로비교괄합아국풍전병망기술。연후이용이론연구화연건방진，득출유원Crowbar 보호전로적상관삼수。연구기술최종응용여동북모풍엄，단궤3 MW풍궤병망계통。통과현장결론분석，득출쌍궤풍전궤조병망시，채용유원Crowbar보호전로가이해결전망전압파동시조성적전궤과전류화변류기직류측과전압문제，사쌍궤풍전궤조완성저전압천월운행。
This paper discusses DFIG operation and grid connection techniques,and presents a detailed analysis on the application of active Crowbar in wind power grid connection.Modeling and simulation of active/passive circuitry structures and control modes,as well as 90kW double-fed motor experiment show that active Crowbar circuitry is more suitable for wind power grid connection techniques in China.Furthermore,through theoretical research and software simulation,we obtain related parameters of active Crowbar protection circuitry.The techniques are finally applied to a 3 MW per unit wind turbine grid connection system in a wind power plant in Northeast China.As seen from the conclusions drawn on the site,adoption of active Crowbar protection circuitry for DFIG grid connection can solve the problems of motor over-current and over-voltage on the converter DC side in case of grid voltage fluctuations, so that DFIG may perform its LVRT operation.