富含小水电的山区10kV配电网电压质量改进方法

Research on improving voltage quality in 10kV distribution network located in SHP-rich mountain area

在富含水资源的山区,小水电的开发和上网管理比较欠缺。小水电一般直接T接于10kV公用线路,丰水期水电站满发并集中向10kV配网供电,导致配电网电压水平过高;枯水期径流型小水电不发电,由于山区供电半径大,导致线路末端电压水平过低。这2种情况都可能导致用户的用电安全得不到保障,甚至导致用户停产和电器设备烧毁的严重后果。以常德壶瓶山地区为例,通过综合比较各电能质量治理方案,得出该问题的最优解决方案;基于PSASP仿真平台对该地区进行仿真验算,仿真结果表明该最优方案能够达到预期目标。

In the SHP-rich mountain area,the exploitation and electricity interconnection manage-ment of small hydropowers are relatively deficiency.Small hydropowers were generally T-con-nected to the 10kV public power lines.In the wet season,hydropower stations work fully and the electricity are all suppled to the 10kV networks which leads to over-voltage.In the dry season, hydropower stations generally ran off.The long power supply radius in the mountainous area leads to low-voltage at the end of the power line.The above two kinds of circumstances cannot meet the requirement of electricity safety and may lead to serious consequences,such as user out-age and electrical equipment burnout.Huping mountain area of Changde,as a case,was analyzed in this paper,the optimal solution to the voltage control problem was gained by comprehensive comparison of power quality treatment schemes.PSASP simulation model was built and the sim-ulation results showed that the optimal scheme can achieve the anticipated target.