CAJ | 학술논문

　　为了对包含双馈感应风力发电机风电场的联络线保护进行研究，有必要对联络线发生故障时的短路电流特性进行分析。对于联络线对称短路故障，利用双馈风力发电机定、转子磁链的暂态变化机理，推导了双馈风力发电机组在联络线远端和近端故障情况下的定子暂态电流解析表达式。对于不对称短路故障，通过利用对称分量法和双馈感应风力发电机简化正负序等效电路，定性地分析了联络线发生不对称故障时的短路电流特性。仿真结果表明含双馈感应风力发电机的风电场联络线短路电流特性与常规电力系统短路电流特性有明显差别。
　　위료대포함쌍궤감응풍력발전궤풍전장적련락선보호진행연구，유필요대련락선발생고장시적단로전류특성진행분석。대우련락선대칭단로고장，이용쌍궤풍력발전궤정、전자자련적잠태변화궤리，추도료쌍궤풍력발전궤조재련락선원단화근단고장정황하적정자잠태전류해석표체식。대우불대칭단로고장，통과이용대칭분량법화쌍궤감응풍력발전궤간화정부서등효전로，정성지분석료련락선발생불대칭고장시적단로전류특성。방진결과표명함쌍궤감응풍력발전궤적풍전장련락선단로전류특성여상규전력계통단로전류특성유명현차별。
In order to study output transmission line relay of the wind farm based on doubly fed induction generator (DFIG), it is necessary to evaluate the short circuit current characteristics of output transmission line. For the symmetric fault of output transmission line, by using the transient principle of the stator and rotor flux of a DFIG, the expressions of the stator transient currents of the DFIG wind generation system are derived under both the far terminal fault and near terminal fault. For the asymmetric fault of output transmission line, by using the symmetrical component method and the simplified equivalent circuit of a DFIG, short circuit current characteristics are analyzed qualitatively. The simulation results demonstrate that short circuit current characteristics of output transmission line of the wind farm based on DFIG are different from that of a normal bulk electric power system.