基于多机协调进相的无功分配方法

针对电网轻负荷运行时段的无功过剩、主网电压升高的问题,提出一种基于多机协调进相运行的无功分配策略.为确定机组最大进相深度,分析了生产厂家、进相试验和PSD-BPA仿真的P-Q曲线(P为有功功率,Q为无功功率),得到机组进相运行特点及差异性,指出多机进相协调运行时,应依据进相机组的当前有功和进相试验曲线得到最大进相深度.以多机进相整体安全裕度最大、各机组安全裕度相近为目标,建立多机协调进相的无功分配模型,并设计了粒子群算法求解模型.最后通过某实际220 kV分区电网仿真分析,验证了方法的有效性.

Coordinated Leading Phase based Multi Units Reactive Power Distribution Method

To address the issues of reactive power surplus and voltage rise during the light load operation period of power network, a coordinated leading phase based reactive power distribution strategy is proposed for multi-units in this paper. For determining the maximum leading phase depth, firstly the PQ curves provided by the manufacturer, the leading phase field-test and the BPA simulation were independently analyzed to obtain the leading phase operation characteristics and differences among multi-units, then the maximum leading phase depth of multi-units is determined from the active power and leading phase test curve. With the objective of maximizing the overall security margin of multi units and balancing the security margin of individual units, a coordinated leading phase based reactive power distribution model of multi-units is established, and afterward the model is solved by the particle swarm optimization algorithm. Finally, a practical 220 kV power grid is utilized to test the proposed model and method, and the simulation results verify its effectiveness.