Investigating flexibility and stability boosting transmission expansion planning(TEP)methods can increase the renewable energy(RE)consumption of the power systems.In this study,we propose a bi-level TEP method for vol...Investigating flexibility and stability boosting transmission expansion planning(TEP)methods can increase the renewable energy(RE)consumption of the power systems.In this study,we propose a bi-level TEP method for voltage-source-converter-based direct current(VSC-DC),focusing on flexibility and stability enhancement.First,we established the TEP framework of VSC-DC,by introducing the evaluation indices to quantify the power system flexibility and stability.Subsequently,we propose a bi-level VSC-DC TEP model:the upper-level model acquires the optimal VSC-DC planning scheme by using the improved moth flame optimization(IMFO)algorithm,and the lower-level model evaluates the flexibility through time-series production simulation.Finally,we applied the proposedVSC-DC TEPmethod to the modified IEEE-24 and IEEE-39 test systems,and obtained the optimalVSCDC planning schemes.The results verified that the proposed method can achieve excellent RE curtailment with high flexibility and stability.Furthermore,the well-designed IMFO algorithm outperformed the traditional particle swarm optimization(PSO)and moth flame optimization(MFO)algorithms,confirming the effectiveness of the proposed approach.展开更多
针对交直流配电网波动性新能源占比高和交直流两侧协同难度大的问题,基于统一潮流计算方法,提出了一种源-网-储协调双层优化调度模型。针对交直流配电网的复杂网络结构,提出了混合整数网络矩阵描述方法,通过统一迭代实现配电网潮流计算...针对交直流配电网波动性新能源占比高和交直流两侧协同难度大的问题,基于统一潮流计算方法,提出了一种源-网-储协调双层优化调度模型。针对交直流配电网的复杂网络结构,提出了混合整数网络矩阵描述方法,通过统一迭代实现配电网潮流计算。充分考虑配电网中灵活性可调度资源与电压源型换流器(voltage source converter,VSC)的相互关系,构建了双层优化调度模型并使用知识共享获取算法(gaining sharing knowledge based algorithm,GSK)对模型进行求解,上层以经济性为指标对新能源消纳与储能进行调度,确定新能源消纳情况与储能运行状态;下层通过调节VSC控制参数与静态无功补偿装置(static var generators,SVG)输出对配电网潮流进行深层次优化,以降低网损,提高电压质量。通过改进IEEE33系统进行仿真验证。仿真结果表明:经过双层优化后,配电网运行成本明显下降,电压质量得到优化。展开更多
基金supported by the Science and Technology Project of Central China Branch of State Grid Corporation of China under Grant 52140023000T.
文摘Investigating flexibility and stability boosting transmission expansion planning(TEP)methods can increase the renewable energy(RE)consumption of the power systems.In this study,we propose a bi-level TEP method for voltage-source-converter-based direct current(VSC-DC),focusing on flexibility and stability enhancement.First,we established the TEP framework of VSC-DC,by introducing the evaluation indices to quantify the power system flexibility and stability.Subsequently,we propose a bi-level VSC-DC TEP model:the upper-level model acquires the optimal VSC-DC planning scheme by using the improved moth flame optimization(IMFO)algorithm,and the lower-level model evaluates the flexibility through time-series production simulation.Finally,we applied the proposedVSC-DC TEPmethod to the modified IEEE-24 and IEEE-39 test systems,and obtained the optimalVSCDC planning schemes.The results verified that the proposed method can achieve excellent RE curtailment with high flexibility and stability.Furthermore,the well-designed IMFO algorithm outperformed the traditional particle swarm optimization(PSO)and moth flame optimization(MFO)algorithms,confirming the effectiveness of the proposed approach.
文摘针对交直流配电网波动性新能源占比高和交直流两侧协同难度大的问题,基于统一潮流计算方法,提出了一种源-网-储协调双层优化调度模型。针对交直流配电网的复杂网络结构,提出了混合整数网络矩阵描述方法,通过统一迭代实现配电网潮流计算。充分考虑配电网中灵活性可调度资源与电压源型换流器(voltage source converter,VSC)的相互关系,构建了双层优化调度模型并使用知识共享获取算法(gaining sharing knowledge based algorithm,GSK)对模型进行求解,上层以经济性为指标对新能源消纳与储能进行调度,确定新能源消纳情况与储能运行状态;下层通过调节VSC控制参数与静态无功补偿装置(static var generators,SVG)输出对配电网潮流进行深层次优化,以降低网损,提高电压质量。通过改进IEEE33系统进行仿真验证。仿真结果表明:经过双层优化后,配电网运行成本明显下降,电压质量得到优化。
