在了解国内外最新配电自动化技术的基础上,提出智能配电网SDG(Smart Distribution Grid)的概念及内涵,其利用现代电力电子技术、通信技术及网络技术等与电力设备相结合,将配电网在正常及事故情况下的监测、保护、控制等与供电部门的工...在了解国内外最新配电自动化技术的基础上,提出智能配电网SDG(Smart Distribution Grid)的概念及内涵,其利用现代电力电子技术、通信技术及网络技术等与电力设备相结合,将配电网在正常及事故情况下的监测、保护、控制等与供电部门的工作管理有机融合在一起,支持分布式电源接入的互动型网络。构造了智能配电网体系结构并辅以说明分析,将智能配电网结构分为主站层、子站层、终端层3个层次。详细分析了智能配电网的功能,包括故障诊断与恢复功能、仿真模拟功能、地理信息系统(GIS)管理功能以及负荷预测功能。对微网技术、通信技术、传感技术3项关键技术做了详细阐述。展开更多
The increasing penetration of various distributed and renewable energy resources at the consumption premises,along with the advanced metering,control and communication technologies,promotes a transition on the structu...The increasing penetration of various distributed and renewable energy resources at the consumption premises,along with the advanced metering,control and communication technologies,promotes a transition on the structure of traditional distribution systems towards cyber-physical multi-microgrids(MMGs).The networked MMG system is an interconnected cluster of distributed generators,energy storage as well as controllable loads in a distribution system.And its operation complexity can be decomposed to decrease the burdens of communi-cation and control with a decentralized framework.Consequently,the multi-microgrid energy management system(MIVIGEIV1S)plays a significant role in improving energy efficiency,power quality and reliability of distribution systems,especially in enhancing system resiliency during contingencies.A comprehensive overview on typical functionalities and architectures of MMGEMS is illustrated.Then,the emerging communication technologies for information monitoring and interaction among MMG clusters are surveyed.Furthermore,various energy scheduling and control strategies of MMGs for interactive energy trading,multi-energy management,and resilient operations are thoroughly analyzed and investigated.Lastly,some challenges with great importance in the future research are presented.展开更多
With large-scale development of distributed generation(DG) and its potential role in microgrids, the microgrid cluster(MGC) becomes a useful control model to assist the integration of DG. Considering that microgrids i...With large-scale development of distributed generation(DG) and its potential role in microgrids, the microgrid cluster(MGC) becomes a useful control model to assist the integration of DG. Considering that microgrids in a MGC, power dispatch optimization in a MGC is dif-ficult to achieve. In this paper, a hybrid interactive communication optimization solution(HICOS) is suggested based on flexible communication, which could be used to solve plug-in or plug-out operation states of microgrids in MGC power dispatch optimization. HICOS consists of a hierarchical architecture: the upper layer uses distributed control among multiple microgrids, with no central controller for the MGC, and the lower layer uses a central controller for each microgrid. Based on flexible communication links among microgrids, the optimal iterative information are exchanged among microgrids, thus HICOS would gradually converge to the global optimal solution.While some microgrids plug-in or plug-out, communication links will be changed, so as to unsuccessfully reach optimal solution. Differing from changeless communication links in traditional communication networks, HICOS redefines the topology of flexible communication links to meet the requirement to reach the global optimal solutions.Simulation studies show that HICOS could effectively reach the global optimal dispatch solution with non-MGC center. Especially, facing to microgrids plug-in or plug-out states, HICOS would also reach the global optimal solution based on refined communication link topology.展开更多
A reliable and robust communication network is essential to exchange information between distributed generators(DGs)and accurately calculate their control actions in microgrids(MGs).However,the integration of the comm...A reliable and robust communication network is essential to exchange information between distributed generators(DGs)and accurately calculate their control actions in microgrids(MGs).However,the integration of the communication network and MGs poses challenges related to the flexibility,availability,and reliability of the system.Furthermore,random communication disorders such as time delays and packet loss can negatively impact the system performance.Therefore,it is essential to design a suitable secondary controller(SC)with a fast dynamic response to restore voltage and appropriate powersharing,while ensuring that the effects of random communication disorders are eliminated.In this regard,an optimal distributed hybrid model predictive secondary control method is presented in this paper.Realistic simulations are carried out in a mixed simulation environment based on MATLAB and OMNET++,by considering IEEE 802.11(Wi Fi)using the recently developed Internet networking(INET)framework.In the implemented application layer,the recovery Unit is responsible for reducing the impact of random communication disorders.The effectiveness and performance of the proposed method in comparison with a conventional model predictive control are verified by simulation results.展开更多
文摘在了解国内外最新配电自动化技术的基础上,提出智能配电网SDG(Smart Distribution Grid)的概念及内涵,其利用现代电力电子技术、通信技术及网络技术等与电力设备相结合,将配电网在正常及事故情况下的监测、保护、控制等与供电部门的工作管理有机融合在一起,支持分布式电源接入的互动型网络。构造了智能配电网体系结构并辅以说明分析,将智能配电网结构分为主站层、子站层、终端层3个层次。详细分析了智能配电网的功能,包括故障诊断与恢复功能、仿真模拟功能、地理信息系统(GIS)管理功能以及负荷预测功能。对微网技术、通信技术、传感技术3项关键技术做了详细阐述。
基金This work was jointly supported by the National Natural Science Foundation of China(No.51877072)the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(No.LAPS20005).
文摘The increasing penetration of various distributed and renewable energy resources at the consumption premises,along with the advanced metering,control and communication technologies,promotes a transition on the structure of traditional distribution systems towards cyber-physical multi-microgrids(MMGs).The networked MMG system is an interconnected cluster of distributed generators,energy storage as well as controllable loads in a distribution system.And its operation complexity can be decomposed to decrease the burdens of communi-cation and control with a decentralized framework.Consequently,the multi-microgrid energy management system(MIVIGEIV1S)plays a significant role in improving energy efficiency,power quality and reliability of distribution systems,especially in enhancing system resiliency during contingencies.A comprehensive overview on typical functionalities and architectures of MMGEMS is illustrated.Then,the emerging communication technologies for information monitoring and interaction among MMG clusters are surveyed.Furthermore,various energy scheduling and control strategies of MMGs for interactive energy trading,multi-energy management,and resilient operations are thoroughly analyzed and investigated.Lastly,some challenges with great importance in the future research are presented.
基金funded by the State Grid Corporation of China project:Cooperative Simulation of Power Grid and Communication Gridthe National Natural Science Funds 51407030China Postdoctoral Science Foundation 121809
文摘With large-scale development of distributed generation(DG) and its potential role in microgrids, the microgrid cluster(MGC) becomes a useful control model to assist the integration of DG. Considering that microgrids in a MGC, power dispatch optimization in a MGC is dif-ficult to achieve. In this paper, a hybrid interactive communication optimization solution(HICOS) is suggested based on flexible communication, which could be used to solve plug-in or plug-out operation states of microgrids in MGC power dispatch optimization. HICOS consists of a hierarchical architecture: the upper layer uses distributed control among multiple microgrids, with no central controller for the MGC, and the lower layer uses a central controller for each microgrid. Based on flexible communication links among microgrids, the optimal iterative information are exchanged among microgrids, thus HICOS would gradually converge to the global optimal solution.While some microgrids plug-in or plug-out, communication links will be changed, so as to unsuccessfully reach optimal solution. Differing from changeless communication links in traditional communication networks, HICOS redefines the topology of flexible communication links to meet the requirement to reach the global optimal solutions.Simulation studies show that HICOS could effectively reach the global optimal dispatch solution with non-MGC center. Especially, facing to microgrids plug-in or plug-out states, HICOS would also reach the global optimal solution based on refined communication link topology.
文摘A reliable and robust communication network is essential to exchange information between distributed generators(DGs)and accurately calculate their control actions in microgrids(MGs).However,the integration of the communication network and MGs poses challenges related to the flexibility,availability,and reliability of the system.Furthermore,random communication disorders such as time delays and packet loss can negatively impact the system performance.Therefore,it is essential to design a suitable secondary controller(SC)with a fast dynamic response to restore voltage and appropriate powersharing,while ensuring that the effects of random communication disorders are eliminated.In this regard,an optimal distributed hybrid model predictive secondary control method is presented in this paper.Realistic simulations are carried out in a mixed simulation environment based on MATLAB and OMNET++,by considering IEEE 802.11(Wi Fi)using the recently developed Internet networking(INET)framework.In the implemented application layer,the recovery Unit is responsible for reducing the impact of random communication disorders.The effectiveness and performance of the proposed method in comparison with a conventional model predictive control are verified by simulation results.
