300MW发电机组进相运行的讨论分析

Discuss and analysis on leading phase operation of 300MW generator unit

云南电网属于送端电网，由于负荷中心离大容量电源点距离较远，造成系统无功功率的过剩。中枢点母线电压长期偏高。进相试验通过静稳定试验，确定了发电机按稳定极限条件进相的运行范围；结合发电机端部及构件的温度测量，确定了按端部发热条件所限制的运行范围，进而确定了部分大机组进相运行的能力。

Yunnan Power Grid belongs to export power grid. Due to the long distance from load centre to the large capacity power supply point, it causes the excess of system reactive power and a higher voltage level of pilot bus. Leading phase research determines the scale of generators operation under the stability limit conditions, by static stability research. Combining with the temperature measurement of generator top and elements, it also confirms the scale of generators operation under the heat conditions of top, and the leading phase operation capacity of some large units.