分布式资源大规模并网要求配电网的灵活调控能力不断增强,如何充分利用多层级灵活性资源协助系统运行成为目前亟待解决的问题。为此,文中提供一种支撑多种资源接入配电网的分级自治协同策略。首先,分析多层级下灵活性资源特性,对分布式...分布式资源大规模并网要求配电网的灵活调控能力不断增强,如何充分利用多层级灵活性资源协助系统运行成为目前亟待解决的问题。为此,文中提供一种支撑多种资源接入配电网的分级自治协同策略。首先,分析多层级下灵活性资源特性,对分布式资源出力采用概率模型以减少其不确定性因素影响。其次,构建主变-馈线-台区分层分区优化调度模型,台区层进行内部自治并将等值结果传递给馈线层,馈线层基于网络架构和资源运行特性进行区域划分,实现兼顾系统安全性和经济性的主配协同优化,并采用基于谱惩罚参数的自适应交替方向乘子法(spectral penalty parameter based adaptive alternating direction method of multipliers,SPPA-ADMM)进行求解。最后,选用改进的IEEE 33节点算例进行仿真,仿真结果表明文中所采用的并行控制方式能有效提高优化求解的效率,验证了所提策略对多种分布式资源分级接入配电网运行调控具有指导意义。展开更多
This research develops a comprehensive method to solve a combinatorial problem consisting of distribution system reconfiguration, capacitor allocation, and renewable energy resources sizing and siting simultaneously a...This research develops a comprehensive method to solve a combinatorial problem consisting of distribution system reconfiguration, capacitor allocation, and renewable energy resources sizing and siting simultaneously and to improve power system's accountability and system performance parameters. Due to finding solution which is closer to realistic characteristics, load forecasting, market price errors and the uncertainties related to the variable output power of wind based DG units are put in consideration. This work employs NSGA-II accompanied by the fuzzy set theory to solve the aforementioned multi-objective problem. The proposed scheme finally leads to a solution with a minimum voltage deviation, a maximum voltage stability, lower amount of pollutant and lower cost. The cost includes the installation costs of new equipment, reconfiguration costs, power loss cost, reliability cost, cost of energy purchased from power market, upgrade costs of lines and operation and maintenance costs of DGs. Therefore, the proposed methodology improves power quality, reliability and security in lower costs besides its preserve, with the operational indices of power distribution networks in acceptable level. To validate the proposed methodology's usefulness, it was applied on the IEEE 33-bus distribution system then the outcomes were compared with initial configuration.展开更多
文摘分布式资源大规模并网要求配电网的灵活调控能力不断增强,如何充分利用多层级灵活性资源协助系统运行成为目前亟待解决的问题。为此,文中提供一种支撑多种资源接入配电网的分级自治协同策略。首先,分析多层级下灵活性资源特性,对分布式资源出力采用概率模型以减少其不确定性因素影响。其次,构建主变-馈线-台区分层分区优化调度模型,台区层进行内部自治并将等值结果传递给馈线层,馈线层基于网络架构和资源运行特性进行区域划分,实现兼顾系统安全性和经济性的主配协同优化,并采用基于谱惩罚参数的自适应交替方向乘子法(spectral penalty parameter based adaptive alternating direction method of multipliers,SPPA-ADMM)进行求解。最后,选用改进的IEEE 33节点算例进行仿真,仿真结果表明文中所采用的并行控制方式能有效提高优化求解的效率,验证了所提策略对多种分布式资源分级接入配电网运行调控具有指导意义。
文摘This research develops a comprehensive method to solve a combinatorial problem consisting of distribution system reconfiguration, capacitor allocation, and renewable energy resources sizing and siting simultaneously and to improve power system's accountability and system performance parameters. Due to finding solution which is closer to realistic characteristics, load forecasting, market price errors and the uncertainties related to the variable output power of wind based DG units are put in consideration. This work employs NSGA-II accompanied by the fuzzy set theory to solve the aforementioned multi-objective problem. The proposed scheme finally leads to a solution with a minimum voltage deviation, a maximum voltage stability, lower amount of pollutant and lower cost. The cost includes the installation costs of new equipment, reconfiguration costs, power loss cost, reliability cost, cost of energy purchased from power market, upgrade costs of lines and operation and maintenance costs of DGs. Therefore, the proposed methodology improves power quality, reliability and security in lower costs besides its preserve, with the operational indices of power distribution networks in acceptable level. To validate the proposed methodology's usefulness, it was applied on the IEEE 33-bus distribution system then the outcomes were compared with initial configuration.
