CAJ | 학술논문

风电接入比例增加，使得电力系统在某些严重故障下必须考虑风电(wind turbine generator，WTG)的切机措施。分析了风电机组和常规火电机组与系统电磁耦合关系的差异性；基于此，分析了风机和常规火电机组切机措施在保持系统稳定效果上的差异性。结果表明常规火电机组获得的加速能量大于风电机组(主要是双馈式风机)，所以从保证切机后的功角稳定出发，应适当增加火电机组的切机量。对风电机组的频率和电压控制能力的分析表明：为保持故障后系统的正常运行，常规火电机组的切机比例也不宜过高；此外，风电机组出力的波动特性也将不可避免地影响切机措施的效果，为解决该问题，提出了考虑风电切机的切机措施的实时调整策略。
풍전접입비례증가，사득전력계통재모사엄중고장하필수고필풍전(wind turbine generator，WTG)적절궤조시。분석료풍전궤조화상규화전궤조여계통전자우합관계적차이성；기우차，분석료풍궤화상규화전궤조절궤조시재보지계통은정효과상적차이성。결과표명상규화전궤조획득적가속능량대우풍전궤조(주요시쌍궤식풍궤)，소이종보증절궤후적공각은정출발，응괄당증가화전궤조적절궤량。대풍전궤조적빈솔화전압공제능력적분석표명：위보지고장후계통적정상운행，상규화전궤조적절궤비례야불의과고；차외，풍전궤조출력적파동특성야장불가피면지영향절궤조시적효과，위해결해문제，제출료고필풍전절궤적절궤조시적실시조정책략。
Increased penetration of wind generation has resulted in a need for wind turbine generator (WTG) tripping under some severe fault circumstances. The difference between electromagnetic coupling relationships of WTGs with system and that of conventional thermal units was analyzed. On this basis, the difference of tripping effects on system stability between WTGs and thermal units was studied. It shows that the accelerating energy gained by conventional unit is larger than that of WTG (mainly doubly fed induction generator (DFIG))after the fault, so as far as the rotor angle stability after the generator tripping measure is concerned, it is better to trip the conventional unit rather than DFIG. The frequency and voltage control capacities of DFIG were discussed. It is concluded that the tripping proportion of conventional units should not be too high due to the poor control capacities of DFIG. The impact of wind power fluctuation feature to the tripping measure was studied. The corresponding real-time adjustment means of WTG tripping measure was offered.