CAJ | 학술논문

针对配电网中光伏发电渗透率逐渐提高、而当前配电网光伏发电规划未充分考虑其无功调节能力的现状，研究将配电网中提供有功和无功的光伏发电、提供无功的电容器进行综合协调优化配置。考虑时序性和随机性，对光伏发电出力和负荷建立分时段多状态模型。以高于置信水平的年费用最小为上层规划目标函数，光伏电源和电容器安装位置和容量为上层优化变量，以高于置信水平的运行年费用最小为下层规划目标函数，每个时段光伏发电无功出力和电容器投切状态为下层优化变量，建立嵌入机会约束规划的二层规划模型。因为考虑光伏发电的无功调节能力以及运行中电源出力随负荷变化的调整，所以配电网损耗、电压等指标和目标函数计算更准确。采用分段二进制编码方式和精英保留策略遗传算法对二层规划模型求解。算例结果表明：配电网中光伏发电、电容器综合配置有利于提高资源利用率、减少投资和运行费用；充分利用光伏发电的无功调节潜力，有助于保证配电网经济安全运行；同时，若光伏发电配合微型燃气轮机等可控电源，可获得更好的投资与运行效益。
침대배전망중광복발전삼투솔축점제고、이당전배전망광복발전규화미충분고필기무공조절능력적현상，연구장배전망중제공유공화무공적광복발전、제공무공적전용기진행종합협조우화배치。고필시서성화수궤성，대광복발전출력화부하건립분시단다상태모형。이고우치신수평적년비용최소위상층규화목표함수，광복전원화전용기안장위치화용량위상층우화변량，이고우치신수평적운행년비용최소위하층규화목표함수，매개시단광복발전무공출력화전용기투절상태위하층우화변량，건립감입궤회약속규화적이층규화모형。인위고필광복발전적무공조절능력이급운행중전원출력수부하변화적조정，소이배전망손모、전압등지표화목표함수계산경준학。채용분단이진제편마방식화정영보류책략유전산법대이층규화모형구해。산례결과표명：배전망중광복발전、전용기종합배치유리우제고자원이용솔、감소투자화운행비용；충분이용광복발전적무공조절잠력，유조우보증배전망경제안전운행；동시，약광복발전배합미형연기륜궤등가공전원，가획득경호적투자여운행효익。
According to the situation that photovoltaic (PV) generation penetration increases gradually and the reactive regulating capability of PV generation is not fully considered in distribution network planning, this paper studied compre-hensive configuration of PV generation, which provides active and reactive power, and switch capacitor, which provide reactive power. Considering the time-sequence characteristic and randomness of load and solar, multi-state model in different periods was established. A bi-level programming model embedding chance constrained programming was proposed, which considers reactive regulating capability of PV generation and adjustment of electrical source output with load changing during operation. The model takes the minimum annual cost above confidence level as the upper level planning objective function, the minimum annual operation cost above confidence level as lower level planning objective function. The elitist strategy genetic algorithm based on segmented chromosome coding was applied for solving bi-level programming model. The simulation results of example show that comprehensive optimal configuration of PV generation and switch capacitor can enhance the utilization of active-reactive power sources as well as reduce investment and operation costs, and it is helpful for the safe and economic operation of distribution network to make full use of PV generation’s reactive potential. Meanwhile, better investment and operation benefits can be obtained when incorporating PV generation with controllable sources such as micro-gas-turbine (MGT).