含统一潮流控制器的拟线性化动态最优潮流

Quasi-linearized dynamic optimal power flow with unified power flow controller

统一潮流控制器(UPFC)具有强大的潮流控制能力,但是目前工程中的控制策略仅停留在控制站层面;含UPFC的动态最优潮流计算可以有效提高电网的安全性和经济性,但是其计算效率低、收敛性差,难以满足电网实时性要求。基于此,通过解耦、代换、热启动和迭代更新4个步骤,提出对初值不敏感的线性化动态最优潮流模型,并研究拟线性化的UPFC模型,最终建立含UPFC的拟线性化动态最优潮流模型。基于等值原理,从地区电网数据中提取南京西环网117节点等值系统,采用简化原对偶内点法对其进行求解测试,算例结果表明所建模型具有较高的计算效率和计算精度。

UPFC（ Unified Power Flow Controller） is capable of efficient power flow controls. However,current practical control strategies are limited to the control station level. The dynamic optimal power flow with UPFC can effectively improve the security and economic of the power grid,which,however,suffers from the problems of low efficiency and poor convergence,as a result,its real-time applications in practical power grids cannot be satisfied. On this background,a linear dynamic optimal power flow model is proposed,which is insensitive to the initial value and includes four steps of decoupling,substitution,hot start and iteration. A quasi-linearized UPFC model is also studied,based on which a quasi-linearized dynamic optimal power flow model with UPFC is established. Based on the equivalent principle,a 117-bus equivalent Nanjing West Ring Network is derived from the regional power grid,and the simplified primal-dual interior point method is employed to solve the optimization problem. Test results show that the proposed model exhibits satisfactory computational efficiency and calculation accuracy.