【摘要】 针对在不同位置安装差异化容量的分布式潮流控制器(distributed power flow controller,DPFC)会带来不同的调控效能这一问题,提出选址定容两阶段DPFC优化方法。阐述了DPFC结构演变及其装置原理,对比统一潮流控制器分析DPFC的特点及优势。基于串联侧的分布式结构,研究DPFC运行状态及空间转移模型。考虑到在电网不同位置安装差异化容量的DPFC将产生不同效能,制订选址定容两阶段DPFC优化方法,以最优成本获得电网性能提升的最佳效果和最大经济效益。基于DPFC对断面潮流均衡的影响度、对母线电压稳定贡献度来选取最优安装点,应用经济性成本/效益分析来迭代优化其容量。选取某省220 kV地区电网开展仿真分析,在该电网中进行DPFC优化配置以验证策略的可行性与正确性。仿真试验表明:优选地点能够有效改善断面潮流均衡性,优选装置容量可大幅提升断面输电能力期望,且该方式下DPFC效能比最大,电网总效益能够取得极大值。更多还原

【Abstract】 Aiming at the problems of different regulation and control effects due to the installation of distributed power flow controller(DPFC) at different locations with different capacities, this paper proposes a two-stage DPFC optimization method including location selection and capacity opitmization. The paper expounds the structure evolution and device principle of the DPFC, and compares its characteristics and advantages with the unified power flow controller(UPFC). Based on the distributed structure of its series side, the paper also studies the operating state and space transfer model of the DPFC. Considering that installing the DPFC with different capacities at different locations on the power grid may produce different efficiency, this paper formulates a two-stage optimization method for the location selection and capacity determination of DPFC to obtain the optimal promotion effect and the maximum economic benefits at the optimal cost. The optimal installation location is selected based on the influence degree of the DPFC on the cross-section power flow balance and the contribution to the bus voltage stability, and then the economic cost/benefit analysis is applied to optimize the capacity. The paper selects a 220 kV power grid to carry out simulations, and optimizes the DPFC configuration in the power grid to verify the feasibility of the proposed strategy. The simulations show that the optimal location can effectively improve the balance of cross-section power flow, the optimal device capacity can greatly increase the expected transmission capacity of the cross-section. Meanwhile, under this situation, the efficiency ratio of the DPFC is the largest, and the total benefit of the power grid can reach a maximum value.更多还原