基于立体九域图的变电站无功电压控制策略研究

电压合格与无功充足是电力系统安全稳定运行的基础条件,确定适宜的无功补偿方法和电压调节方案对电网运行有着重要意义。提出了基于立体九域图的无功电压控制策略,与传统九域图控制策略相比,增加了时间轴,在不同的时间段(时区)九域图的无功功率上下限和电压上下限是变化的。通过基于负荷预测的全局无功优化模型得到配电网各变电站的预计调节方案,以此将一天划分为若干个时区,并根据优化曲线得到各时区的运行边界。基于立体九域图的变电站无功电压控制策略结合了动态无功优化与实时调控的优点,避免了无功补偿设备和主变分接头的频繁调节,提高了变电站运行的经济性。

Research on Reactive Voltage Control Strategy of Substations Based on Space Nine-Domain Diagram

Voltage qualified and reactive power is the basic condition for the safe and stable operation of power sys -tem.It is important to determine the appropriate reactive power compensation method and voltage regulation scheme for power network operation .Compared with the traditional nine-domain graph control strategy , the reactive power voltage control strategy based on the three-dimensional nine-domain diagram is proposed in this paper .The time axis is added while the upper and lower limits of the voltage in different time zones ( time zones ) are changing .Based on the global reactive power optimization model of load forecasting , the expected adjustment scheme of each substation in the distribution network is obtained , which divides the day into several time zones and obtains the operating boundary of each time zone according to the optimization curve .The reactive power and voltage control strategy of substation based on three-dimensional nine-domain diagram combines the merits of dynamic reactive power optimization and real-time control, which not only avoids the frequent adjustment of reactive power compensation equipment and main trans -former tap , but also improves the economic operation of substation .