同步发电机进相能力的快速估算方法

A Fast Estimation Method of Synchronous Generator Leading Phase Ability

发电机进相运行是一种经济性和技术性俱佳的调节电网电压、改善电能质量的先进手段。建立了发电机接入系统的网络简化模型及其等值电路,并推导得出发电机机端电压、厂用电电压、发电机功角的解析表达式,通过联立方程的求解即可快速得到发电机在各典型有功出力下的无功进相极限值。应用该方法对某680 MW汽轮机和250 MW水轮机的进相能力进行计算分析,结果表明,该方法能有效克服传统方法工序繁杂且费时的局限性,具有计算速度快、精度高和易于应用等特点。

Generator leading phase operation is an economic and effective measure for voltage regulation and power quality improvement.In this paper,a simplified network model of generator access system and its equivalent circuit is built and the analytical expression of generator terminal voltage,auxiliary power voltage and generator power angle are derived.By solving these simultaneous equations,the generator leading phase ability under different typical active power can be calculated.The results of simulation for a 680 MW steam generator and a 250 MW hydraulic generator show that the proposed method can effectively improve the calculation speed and precision,and suitable for engineering practice.