The tertiary voltage control module gives the reference voltage curves of the pilot nodes by a power loss least based optimal power flow ( OPF ) calculation .
三 级 电压控制利用以网损最小为目标的最优潮流计算，求出中枢母线电压的设定值曲线。
Secondary Voltage Control is a very important part of hierarchical voltage control . It links tertiary voltage control and primary voltage control and can coordinate reactive power resources of the control region . Its performance directly affects voltage and reactive power control effect .
二级 电压控制是分级电压控制中非常重要的一环，不仅 承上启下，而且能协调控制区域内无功资源，其性能优劣直接影响电压无功控制效果。
Tertiary reactors can be economically switched as system reactive power requirements and voltage profiles vary .
接在 第 三绕组上的电抗器可根据系统无功的要求以及 电压分布的变化而经济地投切。
The tertiary level partitioning power system into some control areas and do the global optimization of voltage and reactive power .
其中， 第 三级在将整个电力系统分成若干控制区域的基础上，进行 电压无功的全局优化；
三次电压，第三电压