湖北电网枯水期小方式典型日电压无功分析

Analysis on Typical Daily Voltage and Reactive Power of Low-Load Mode in Hubei Power Grid During Dry Season

根据湖北电网的特点,枯水期小负荷方式下湖北西部水电出力大幅减少,东部火电机组出力较大,由于系统电源出力及负荷的变化,导致系统电压的大幅波动,枯小方式下湖北电网电压偏高及电压波动的问题较突出。以2021年枯水期小方式典型日为例,以当日负荷最低点的潮流数据为基础,对2021年湖北电网枯小方式500 kV、220 kV两个电压等级的电压水平及无功潮流进行详细分析,并提出电压控制建议。

According to the characteristics of Hubei power grid,under the low-load mode in the dry season,the hydropower output in the western part of Hubei Province is greatly reduced,while the thermal power unit output in the eastern part is larger. Due to the change of power output and load of the system,the system voltage fluctuates greatly. Under the low-load mode in dry season,the problems of high voltage and voltage fluctuation of Hubei power grid are prominent. This paper takes a typical low-load mode day of the year 2021 in dry season as an example and the power flow data of the lowest point of the load on that day as the basis to make detailed analyses on the voltage level and reactive power flow of the low-load mode of Hubei power grid in 2021 at 500 kV and 220 k V voltage levels,and the paper also puts forward suggestions for voltage control.