自激异步发电机短并励连接电容值的确定  

Determination of Short-shunt Connected Capacitance for Self-excited Induction Generator

作　　者：王龙鹏[1] 吴新振[1] 袁博强[1] 

机构地区：[1]青岛大学自动化工程学院,山东省青岛市266071

出　　处：《中国电机工程学报》2010年第18期85-90,共6页Proceedings of the CSEE

基　　金：山东省自然科学基金项目(ZR2009FM004)~~

摘　　要：为了改善自激异步发电机带负载能力和提高电压稳定性,采用电容短并励连接对其进行无功补偿,并确定最佳短并励电容值。以电容短并励连接异步发电机基值频率下的稳态等值电路为基础,通过优化方法求解回路阻抗方程,计算出不同短并励电容下异步发电机的外特性。将输出电压调整率作为稳定性判断指标,在负载功率因数给定的情况下,2次利用一维优化法确定发电机的最佳短并励电容值。分析结果表明,短并励电容能有效地提高自激异步发电机的带负载能力,最佳短并励电容的无功补偿可使发电机具有理想的电压稳定性。实验结果与计算结果一致,验证了求解模型的正确性。To improve the capacity for carrying loads and increase the volatge stability of self-excited induction generators,the short-shunt connected capacitor was utilized to compensate for reactive power and the optimum short-shunt capacitance was determined.Based on the steady state equivalent circuit,referred to the fundamental frequency of the induction generator with the short-shunt capacitor,the optimization method was performed to solve the loop impedance equation.External characteristics of the induction generator connected with short-shunt capacitors were given for different capacitances.Output voltage regulation of the generator was selected as the identification of voltage stability,and the optimum short-shunt capacitance was obtained for load with known power factor by using one-dimensional optimization method twice.The analysis results indicate that short-shunt capacitors can efficiently enhance the capacity for carrying loads of the generator and the optimum short-shunt capacitor can provide desired voltage stability by reactive power compensation.The agreements between experimental results and calculated results also confirm the validity of the proposed model.

关 键 词：异步发电机 短并励 电容确定 优化方法 电压调整率 

分 类 号：TM343[电气工程—电机]