进相试验中水轮发电机进相安全域的计算
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摘要
为指导水轮发电机进相试验,介绍了一种对其进相安全域进行计算的方法。基于单机无穷大系统的静态稳定条件,建立了不同工况下的水轮发电机组进相稳定边界方程,分析了方程中系统电抗、系统电压、同步电抗等重要参数对进相稳定的影响,指出对进相边界进行校核的必要性,同时给出多种约束条件下的校核方案。以某300 MW机组为例,分别计算和实测了不同工况下的机组进相运行数据,数据对比表明该计算方法在指导进相试验中具有很好的应用性。
To guide the leading phase test of the hydro-generators,a calculation method is presented to get the leading phase safety region.Based on the static stability theory of the single-machine infinite bus system,the boundary equations of the generator are established,and the influences for the stability caused by the parameters in the equations such as power system reactance and voltage,synchronous reactance,are analyzed to reveal the necessity of the boundary verification.The method to modify the boundary under different limited conditions is also given.Taking one 300 MW hydro-generator for example,its running parameters in the leading phase operation are abtained by calculation and test,and the comparison proves that the method is useful for the leading phase operation test.
To guide the leading phase test of the hydro-generators,a calculation method is presented to get the leading phase safety region.Based on the static stability theory of the single-machine infinite bus system,the boundary equations of the generator are established,and the influences for the stability caused by the parameters in the equations such as power system reactance and voltage,synchronous reactance,are analyzed to reveal the necessity of the boundary verification.The method to modify the boundary under different limited conditions is also given.Taking one 300 MW hydro-generator for example,its running parameters in the leading phase operation are abtained by calculation and test,and the comparison proves that the method is useful for the leading phase operation test.
引文
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[2]严伟,陈俊,沈全荣.大型隐极发电机进相运行的探讨[J].电力系统自动化,2007,31(2):94-97.
[3]陈群,袁庆来,陈讯,等.当前国内开展进相运行的意义及存在的问题[J].大电机技术,2000(2):14-18.
[4]刘喜泉,谢燕军,陈小明,等.水轮发电机低励限制与失磁保护整定配合研究与试验[J].大电机技术,2016(1):59-61.
[5]伍常林,李永林,熊续平.一起机组突然深度进相故障的分析及处理[J].华东电力,2010,38(11):1830-1831.
[6]王成亮,王宏华.大型同步发电机进相运行动模试验设计[J].电测与仪表,2016,53(2):118-124.
[7]曹侃,王涛,忻俊慧.同步发电机进相能速快速估算方法[J].中国电力,2014,47(1):108-111.
[8]李发海,朱东起.电机学[M].北京:科学出版社,2001:259-265.
[9]王勇.水轮同步发电电动机静态稳定运行曲线绘制及应用[J].大电机技术,2015(4):34-37.
[10]郭景斌,单周平.水轮发电机静态稳定应用分析方法[J].大电机技术,2000(4):23-26.
[11]李志强,何凤军,晁晖,等.进相试验中水轮同步发电机静态稳定限制的数值分析[J].电机与控制学报,2011,15(12):89-95.