计及统一潮流控制器的无功优化研究

以统一潮流控制器(UPFC)为代表的灵活交流输电系统(FACTS)技术可以实现传输功率的合理分布、优化系统资源,提高系统的稳定性和可靠性。基于内点优化方法,提出了计及UPFC的无功优化模型,以系统网损最小为目标函数,采用UPFC电压源模型,将其作用等效为一系列电压和功率的约束,直接放到内点法的约束中,在不同的负荷运行方式下进行了优化分析。在IEEE-14节点系统测试中发现,引入UPFC后系数矩阵的维数会有所增加,但不会影响其收敛性。算例就系统网损对装设UPFC前后进行了比较,并给出了最后控制方案下UPFC的参数值,结果表明该方法是可行、有效的。

Research on Reactive Power Optimization Considering Unified Power Flow Controllers

The technique of flexible AC transmission system(FACTS),especially the unified power flow controller(UPFC),can make the distribution of power flow reasonable and the system resources optimal,and improve the system stability and reliability.This paper proposes a model for reactive power optimization considering UPFC based on the interior point algorithm.The method takes the minimal system loss as the objective function,adopts the UPFC voltage source model and transforms the effect into a series of voltage and power restricts.Restricts are analyzed in different load operational modes based the interior point method.The tests of IEEE-14 demonstrate that the dimension of coefficient matrix is bigger when the UPFC is installed,but the convergence is not affected.Moreover,the test compares the system loss of the original system and the modified one,and gives the parameters of UPFC in the last control scheme.The results show the effectiveness and feasibility of the method.