选择合适的STATCOM装置安装位置能显著提高电力系统的稳定性.该文重点研究了电力系统扰动过程中各支路两端相角差以及支路势能分布的变化特点,并根据系统失稳时临界割集处支路两端相角差超过180°且趋于无界,而所有其余支路两端相角差均在有界范围内变化的特点,提出在系统的临界割集或其附近安装STATCOM等并联无功补偿装置.结果表明:补偿后的系统改善了电压质量,大大提高了电力系统的功角稳定性.对New England 10机系统进行了STATCOM装置的配置,验证了所提方法的有效性.%Choosing appropriate STATCOM device locations can considerably improve the stability of power system. The change feature of branch phase-angle difference and branch potential energy distribution during power system disturbance are emphatically studied, and according to the feature of losing stability that the change of branch phase-angle difference in critical cut-set exceed 1800 to unboundedness and the change of branch phase-angle difference in any others are bounded, allocating STATCOM shunt compensation devices around critical cut-set of system is proposed. The results show that the voltage of post-compensation power system is improved, and power-angle stability of power system is considerably enhanced. STATCOM devices are allocated in New England 10-machine power system, and the validity of the proposed method is testified.
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