配电网接入分布式电源、储能系统后,其主动控制系统须同时兼顾全局优化与局部自治控制的要求,具有对各分布式电源、储能以及配电网运行方式的主动调节能力。提出馈线控制误差(feeder control error,FCE)指标,实时描述主动配电网实际运...配电网接入分布式电源、储能系统后,其主动控制系统须同时兼顾全局优化与局部自治控制的要求,具有对各分布式电源、储能以及配电网运行方式的主动调节能力。提出馈线控制误差(feeder control error,FCE)指标,实时描述主动配电网实际运行状态与最优运行状态的差异,并基于FCE提出了定交换功率控制和追踪目标控制两种控制模式下的主动配电网的协调控制,实现全局优化基础上的局部协调控制。最后通过算例仿真分析,验证了基于FCE的主动配电网协调控制模式的有效性。展开更多
大量可再生能源接入电网给配电网的控制带来了巨大挑战,传统配电网的被动控制已经不能满足对配电网能量双向流动的实时控制,发展研究主动配电网分层分布控制能实现对可再生间歇式能源的有效消纳及控制。文中将主动配电网(ADN)划分成3层...大量可再生能源接入电网给配电网的控制带来了巨大挑战,传统配电网的被动控制已经不能满足对配电网能量双向流动的实时控制,发展研究主动配电网分层分布控制能实现对可再生间歇式能源的有效消纳及控制。文中将主动配电网(ADN)划分成3层控制结构,根据全局优化及馈线控制误差(feeder control error,FCE)提出定交换功率控制、区域协同控制、区域自治控制3种模式及它们之间进行主动切换的条件、方法。最后通过MATLAB/Simulink建立一个简单的ADN配电系统模型进行仿真,算例仿真结果验证了这3种模式之间切换的正确性及有效性。展开更多
配电网大量接入分布式电源和储能装置后,集中式的管理模式实时性较差,因此文章提出3层控制结构,将主动配电网进行区域划分,并在每个区域中配置协调控制器进行区域自治控制。根据馈线控制误差(feeder control error,FCE)指标,建立了实时...配电网大量接入分布式电源和储能装置后,集中式的管理模式实时性较差,因此文章提出3层控制结构,将主动配电网进行区域划分,并在每个区域中配置协调控制器进行区域自治控制。根据馈线控制误差(feeder control error,FCE)指标,建立了实时平抑区域运行状态与最优目标之间差异的区域控制机制,据此提出了分层分布控制器与源网协调控制器的模型。根据FCE指标的不同形式,提出馈线定交换功率、区域独立自治和区域协同自治3种控制模式,以适应不同电网需求。最后通过广东某主动配电网示范现场算例的仿真分析,验证了所提分层分布控制策略的合理性和有效性。展开更多
为实现主动配电网对可再生能源最大程度的消纳,提出了一种主动配电网分布式能源分区消纳的协调控制策略。依据分段开关位置将配电网划分为若干含有分布式能源的自治区域,以可再生能源最大消纳情况下成本最低为目标进行全局优化;每个区...为实现主动配电网对可再生能源最大程度的消纳,提出了一种主动配电网分布式能源分区消纳的协调控制策略。依据分段开关位置将配电网划分为若干含有分布式能源的自治区域,以可再生能源最大消纳情况下成本最低为目标进行全局优化;每个区域接受全局优化潮流算法提供的优化目标,在此基础上根据馈线功率误差指标(feeder control error,FCE)计算的功率偏差总额,仅考虑自治区域局部拓扑,采用配网直流潮流运算,利用区域内的分布式电源快速实现自治区域中馈线功率误差(FCE)的分配和消纳,最终实现FCE等于零;无法完成区域目标时相邻区域相互通信协助补足差额。最后,通过双馈线7个自治区域的系统算例验证了算法的有效性。展开更多
With the access to large amounts of renewable energy sources(RES),operation uncertainty of distribution networks increases significantly.Fortunately,adopting advanced information and communication technology,a cyber-p...With the access to large amounts of renewable energy sources(RES),operation uncertainty of distribution networks increases significantly.Fortunately,adopting advanced information and communication technology,a cyber-physical distribution network(CPDS)provides the possibility to solve this problem via aggregative management of decentralized controllable loads.However,information flow in cyber space deeply interacts with energy flow in physical space,leading to a complexity in modeling,design and analysis of the whole control process.To deal with this problem,a general hybrid flow model of CPDS is first proposed in this paper.In this model,the control process is abstracted into interactions among three types of cyber nodes through cyber branches.The mathematic model of cyber nodes and branches is developed as well as that of the controlled physical object for hybrid flow computation.Then,based on the hybrid model,an instantiated application to compensate feeder power deviation caused by RES fluctuation through aggregative control of large-scale air-conditioners(ACs)is investigated.In this application,coordinative control of the AC cluster is achieved through a decentralized control strategy with very little communication cost and very good privacy protection.Results of numerical examples verify the correctness and flexibility of the hybrid flow model in reflecting interactions between cyber flow and energy flow as well as system operations.The proposed decentralized control strategy of the AC cluster is also proven to be effective and robust in FCE compensation.展开更多
文摘配电网接入分布式电源、储能系统后,其主动控制系统须同时兼顾全局优化与局部自治控制的要求,具有对各分布式电源、储能以及配电网运行方式的主动调节能力。提出馈线控制误差(feeder control error,FCE)指标,实时描述主动配电网实际运行状态与最优运行状态的差异,并基于FCE提出了定交换功率控制和追踪目标控制两种控制模式下的主动配电网的协调控制,实现全局优化基础上的局部协调控制。最后通过算例仿真分析,验证了基于FCE的主动配电网协调控制模式的有效性。
文摘大量可再生能源接入电网给配电网的控制带来了巨大挑战,传统配电网的被动控制已经不能满足对配电网能量双向流动的实时控制,发展研究主动配电网分层分布控制能实现对可再生间歇式能源的有效消纳及控制。文中将主动配电网(ADN)划分成3层控制结构,根据全局优化及馈线控制误差(feeder control error,FCE)提出定交换功率控制、区域协同控制、区域自治控制3种模式及它们之间进行主动切换的条件、方法。最后通过MATLAB/Simulink建立一个简单的ADN配电系统模型进行仿真,算例仿真结果验证了这3种模式之间切换的正确性及有效性。
文摘配电网大量接入分布式电源和储能装置后,集中式的管理模式实时性较差,因此文章提出3层控制结构,将主动配电网进行区域划分,并在每个区域中配置协调控制器进行区域自治控制。根据馈线控制误差(feeder control error,FCE)指标,建立了实时平抑区域运行状态与最优目标之间差异的区域控制机制,据此提出了分层分布控制器与源网协调控制器的模型。根据FCE指标的不同形式,提出馈线定交换功率、区域独立自治和区域协同自治3种控制模式,以适应不同电网需求。最后通过广东某主动配电网示范现场算例的仿真分析,验证了所提分层分布控制策略的合理性和有效性。
文摘为实现主动配电网对可再生能源最大程度的消纳,提出了一种主动配电网分布式能源分区消纳的协调控制策略。依据分段开关位置将配电网划分为若干含有分布式能源的自治区域,以可再生能源最大消纳情况下成本最低为目标进行全局优化;每个区域接受全局优化潮流算法提供的优化目标,在此基础上根据馈线功率误差指标(feeder control error,FCE)计算的功率偏差总额,仅考虑自治区域局部拓扑,采用配网直流潮流运算,利用区域内的分布式电源快速实现自治区域中馈线功率误差(FCE)的分配和消纳,最终实现FCE等于零;无法完成区域目标时相邻区域相互通信协助补足差额。最后,通过双馈线7个自治区域的系统算例验证了算法的有效性。
基金supported in part by the National Key Research and Development Program of China(Basic Research Class 2017YFB0903000)the National Natural Science Foundation of China(51677116)the Science and Technology Project of State Grid Corporation of China:Basic Theory and Method of Analysis and Control of Cyber Physical System for Power Grid(Supporting Project).
文摘With the access to large amounts of renewable energy sources(RES),operation uncertainty of distribution networks increases significantly.Fortunately,adopting advanced information and communication technology,a cyber-physical distribution network(CPDS)provides the possibility to solve this problem via aggregative management of decentralized controllable loads.However,information flow in cyber space deeply interacts with energy flow in physical space,leading to a complexity in modeling,design and analysis of the whole control process.To deal with this problem,a general hybrid flow model of CPDS is first proposed in this paper.In this model,the control process is abstracted into interactions among three types of cyber nodes through cyber branches.The mathematic model of cyber nodes and branches is developed as well as that of the controlled physical object for hybrid flow computation.Then,based on the hybrid model,an instantiated application to compensate feeder power deviation caused by RES fluctuation through aggregative control of large-scale air-conditioners(ACs)is investigated.In this application,coordinative control of the AC cluster is achieved through a decentralized control strategy with very little communication cost and very good privacy protection.Results of numerical examples verify the correctness and flexibility of the hybrid flow model in reflecting interactions between cyber flow and energy flow as well as system operations.The proposed decentralized control strategy of the AC cluster is also proven to be effective and robust in FCE compensation.
