进相试验中凸极同步发电机静态稳定限制的数值分析  

Numerical analysis of steady state stability limit of salient synchronous generator in leading power factor operation test

作　　者：李志强[1] 何凤军[1] 晁晖[1] 符阳林 

机构地区：[1]中国电力科学研究院,北京100192 [2]四川省电力工业调整试验所,四川成都610016

出　　处：《电机与控制学报》2011年第12期89-95,共7页Electric Machines and Control

基　　金：国家自然科学基金(51107122)

摘　　要：为研究凸极同步发电机进相试验中进相无功及功角的限值问题,建立了两种不同进相试验条件下凸极同步发电机静态稳定功率方程。通过对两个功率方程的数值分析,揭示了凸极同步发电机静态稳定极限功率和极限功角随试验电压及电气参数的变化规律,以及发电机饱和对静态稳定的影响。研究结果表明,凸极发电机低负荷时的进相深度主要取决于其q轴电抗;相同条件下d、q电抗越小发电机允许的进相无功和其极限功角越大;进相试验电压对极限无功影响较大,但对极限功角影响很小;利用发电机不饱和参数计算出极限无功和功角比较保守,以此为依据进行进相深度的控制可以保障机组的运行安全。To study the limit of reactive power and power angle of salient synchronous generator in leading power factor operation test,the steady state stability power equations under two different test conditions were established.Through the numerical analysis on those two power equations,the variation law of reactive power and power angle limit with the different test voltages and electric parameters,as well as,the influence of generator saturation on the steady state stability were revealed.The results show that the leading phase depth of salient synchronous generator with the light load mainly depends on the q-reactance,with the same condition,the smaller dq reactance is,the bigger leading reactive power and limit power angle can be allowed.The test voltages have a great influence on the limit reactive power while it is contrary to the limit power angle.It is somewhat conservative if the unsaturated parameters are adopted to calculate the limit reactive power and angle,and the operation safety of the generator sets may be guaranteed if the leading depth can be controlled by this method.

关 键 词：进相试验 凸极发电机 静态稳定 极限功率 极限功角 

分 类 号：TU313[建筑科学—结构工程]