摘要
以单机-无穷大系统为例,对HSVC提高系统稳定性的机理作了分析。从变压器阻抗的补偿作用和系统阻尼的改善两个方面论证了高压侧电压控制对单机-无穷大系统静态和动态稳定性的影响,并与机端电压控制作了比较。理论分析表明:与常规的机端电压控制(TVC)相比,HSVC由于能够同时补偿发电机电抗和变压器电抗,因而能更好地补偿系统电抗,进而提高系统静态稳定极限。同样,对阻尼力矩的分析表明:在重负载下,高压侧电压控制在改善系统的动态特性、提高系统的静态稳定极限等方面都明显优于机端电压控制,HSVC能够更好的改善系统的动态特性。通过对具体算例的特征值分析和时域仿真,验证了理论分析的正确性。
This paper, describes the effects of High Side Voltage Control (HSVC) on stabilities of one machine infinite bus by its consequences of compensation of transformer impedance and improvement of system damping. Also, a com-parison between HSVC and Terminal Voltage Control (TVC) is made. Theoretical analysis shows that HSVC compensates both generator impedance and transformer impedance. In comparis-on, HSVC can compensate more impedance and improves the static stability of the power system. Then, damping analysis shows that HSVC have distinct advantage over TVC in improving system dynamic, steady state stability and oscillatory stability. At last, eigenvalue analysis and step-by-step simula-tions prove their validity.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2003年第1期60-63,共4页
Proceedings of the CSEE
