大型发电机调差率整定及调试  

Setting and commissioning of voltage adjustment ratio for large generator

作　　者：方思立[1] 苏为民[2] 

机构地区：[1]中国电力科学研究院,北京100085 [2]华北电力科学研究院,北京100045

出　　处：《中国电力》2006年第8期12-15,共4页Electric Power

摘　　要：介绍了发电机电压调差率的计算和试验方法,分析了发电机电压调差率对电力系统稳定的影响。建议大型发电机组励磁调节器应投入附加调差。调差率的计算采用额定无功为标么值,符合发电机调差率的定义,附加调差则以额定视在功率为标么值,以方便计算对变压器电抗补偿的程度。对于发电机变压器组,调差率以额定无功为标么值计算时,取3%左右,有利于提高电力系统电压自动控制能力,并可提高电力系统静态稳定和电压稳定。The calculation and test methods of voltage adjustment ratio for generator were introduced, and the influence of voltage adjustment ratio for generator on power system stability was analyzed. It is suggested that the additional voltage adjustment for excitation regulator of large generator should be put into service. The voltage adjustment ratio is calculated by using the rated reactive power as per unit, which coincides with the definition of vohage adjustment ratio for generator. The additional voltage adjustment should be accorded with the rated VA power as per unit, which can easily calculate the level of reactance compensation for transformer. When the voltage adjustment ratio taken the rated r eactive power as per unit is calculated for generator-transformer unit, it is taken 3% around, which is helpful to raise the automatic control ability of power system voltage, and improve power system static stability and voltage stability.

关 键 词：励磁调节 调差 电抗补偿 

分 类 号：TM31[电气工程—电机]