CAJ | 학술논문

近年来电力系统中频繁出现汽轮机调速系统引发的低频振荡，为了探明该类低频振荡的原因，分析了调速系统对电力系统动态稳定的影响。建立了包含汽轮机调速系统的单机无限大系统模型，研究了调速系统增益对系统低频振荡模态的影响。研究结果表明，汽轮机调速系统增益虽然不改变调速系统阻尼特性分界频率，但是却对系统低频振荡模态频率产生影响，从而改变调速系统对低频振荡的阻尼性质。当调速系统增益超过临界增益时会诱发低频振荡现象，时域仿真和频域分析结果验证了上述结论的正确性。
근년래전력계통중빈번출현기륜궤조속계통인발적저빈진탕，위료탐명해류저빈진탕적원인，분석료조속계통대전력계통동태은정적영향。건립료포함기륜궤조속계통적단궤무한대계통모형，연구료조속계통증익대계통저빈진탕모태적영향。연구결과표명，기륜궤조속계통증익수연불개변조속계통조니특성분계빈솔，단시각대계통저빈진탕모태빈솔산생영향，종이개변조속계통대저빈진탕적조니성질。당조속계통증익초과림계증익시회유발저빈진탕현상，시역방진화빈역분석결과험증료상술결론적정학성。
In recent years low frequency oscillations induced by steam turbine governor system often occur in power system. For find-ing out the cause of this kind of low frequency oscillation, the effect of governor system on power system dynamic stability was thor-oughly analyzed. One machine infinite bus model including steam turbine governor system was put up and the effect of governor sys-tem gain on low frequency oscillation mode was researched. The study result indicate that although the dividing line frequency of damping characteristic cannot be changed by governor system gain, the mode frequency of power system low frequency oscillation will be influenced. Consequently, the damping character of governor system on low frequency was changed. If the gain of governor system exceeds the critical gain, low frequency oscillation will be aroused. Time domain simulation and frequency domain analysis proved the correctness of the above conclusion.