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A new transient stability margin based on dynamic security region and its applications

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Science china(Technological Sciences) 2008年第6期51卷 751-760页

作者： xue ancheng1, 2 & mei ShengWei1 1 state key lab of power systems, Department of electrical engineering, tsinghua university, beijing 100084, china 2 key lab of systems and Control, Institute of systems Science, Chinese Academy of Sciences, beijing 100190, china state key lab of power systems Department of Electrical Engineering Tsinghua University Beijing 100084 China

A new transient stability margin is proposed based on a new expression of dynamic security region (DSR) which is developed from the existing expression of DSR. Applications of the DSR based transient stability margin to contingency ranking and screening are discussed. Simulations in the 10-machine 39-bus New England system are performed to show the effectiveness of the proposed DSR based tran-sient stability margin.

关键词： dynamic security region (DSR) transient stability margin contingency screening

Control Location Selection Strategy for power System Emergency Control

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Control Location Selection Strategy for Power System Emergen...

第二十六届中国控制会议

作者： Zhang xuemin,mei Shengwei state key lab of power systems,dept.of electrical engineering,tsinghua university,beijing 100084,P.R.china

This paper analyzes the difficulties of emergency control and points out comparability of stability margin and transition of instability mode are the keys of emergency *** a revised normalized stability margin and a hidden mode identification method are proposed to solve these *** on these work,an algorithm for control location selection is *** cases of New-England system verified that the proposed algorithm can find the appropriate location for emergency *** can work not only in same instability mode situation,but also in transferred instability mode situation.

关键词： Emergency Control Stability Margin Instability Mode

H∞ Analysis Method for the Small Signal Stability of power System

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H∞ Analysis Method for the Small Signal Stability of Power ...

第二十六届中国控制会议

作者： mei Shengwei,Che Wenyan state key lab of Control and Simulation of power systems and Generation Equipments dept.of electrical engineering,tsinghua university,beijing,100084,P.R.china

This work is concerned with the small signal stability problem in multi-machine *** means of H∞ theory,firstly the math model with disturbances is constructed;and secondly,the excitation control law for each generator is designed based on solving Riccati ***,simulations performed on 4-machine system shows that the proposed H∞ method has more advantages over LQR method in both damping ratio and H∞ norm of the corresponding closed-loop system and so can enhance the small signal stability of power system greatly.

关键词： Small signal stability H∞ method Excitation control Multi-machine systems

Imputation Schemes for the Cooperative Game in the Hybrid power System Planning

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Imputation Schemes for the Cooperative Game in the Hybrid Po...

第三十届中国控制会议

作者： mei Shengwei,WANG Yingying,LIU Feng state key lab of power systems,Department of electrical engineering,tsinghua university,beijing 100084,P.R.china

＜正＞Game theory is a good way to model the hybrid power system planning,by taking the wind power,photovoltaic generation and storage batteries as *** is illustrated that the grand cooperation of all the three players can achieve the maximum total economic ***,that how to assign the gains from the cooperation is an essential problem in the cooperative game,and is thus the topic of this *** constraints for the core that any imputation of this cooperative game should satisfy are given in this paper to attempt to achieve a mutually acceptable basis for an agreement,such that all the players are interested to cooperate.A modified index of propensity to disrupt is used to test the cooperation strength of a given imputation ***,four specific imputation schemes including the equal assignment,the generation capacity based assignment,the Shapley value and the equal disruption propensity based imputations,are proposed and analyzed,and the last two schemes are illustrated to be the best.

关键词： Cooperative Games Hybrid power System Planning Imputation Core Shapley Value Disruption Propensity

On the Topological Characteristics of power Grids with Distributed Generation

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On the Topological Characteristics of Power Grids with Distr...

第二十九届中国控制会议

作者： MAO Yanbin,LIU Feng,mei Shengwei state key lab of power System,Department of electrical engineering,tsinghua university,beijing 100084,P.R.china

The interconnection of large-scale distributed generation with power grids brings about significant impacts on the grid patterns,the topologies and the network performances of the future power *** this paper,these impacts are investigated by applying the complex network *** analyze and verify some existing statistical indices used in bulk power grids and propose some basic principles for the research on the impacts of distributed generation on the topological characteristics of power ***,two groups of novel indices are put forward,including the structure index based on operational conditions and the operational index based on network ***,some illustrative tests are carried out on the IEEE 57 bus system and the results validate the proposed indices.

关键词： Distributed Generation Complex Network Theory power Grid Evaluation Index Topological Characteristic

On power system blackout modeling and analysis based on self-organized criticality

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Science china(Technological Sciences) 2008年第2期51卷 209-219页

作者： mei ShengWei xue ancheng ZHANG xueMin state key lab of power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084China Institute of systems Science Chinese Academic of SciencesBeijing 100080China

This paper makes a comprehensive survey on power system blackout modeling and analysis based on SOC (self-organized criticality). Firstly,a generalized SOC theory from the viewpoint of cybernetics is introduced. Then the evolution model of power system and its relative mathematical description,which serves as a concrete example of the proposed generalized SOC,are given. Secondly,five blackout models capturing various critical properties of power systems in different time-scales are listed. Finally,this paper analyzes SOC in power systems,such as,the revelation of criticalities of proposed models in both micro-scale and macro-scale which can be used to assess the security of power system,and cas-cading failures process.

关键词： blackout model self-organized criticality (SOC) cascading failures

Failure analysis on china power grid based on power law

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控制理论与应用（英文版） 2006年第3期4卷 235-238页

作者： xiaofeng weng Yiguang HONG ancheng xue Shengwei mei state key lab of power systems Department of Electrical Engineering Tsinghua University Beijing 100084 China Institute of systems Science Chinese Academy of Sciences Beijing 100080 China

This paper is concerned with the mechanism of blackouts in china power system from the viewpoint of self-organized criticality. By using two estimation algorithms of scaled window variance （SWV） and rescaled rangestatistics （R/S）, this paper studies the blackout data in china power system during 1988-1997. The result of analysis shows that the blackout data of 1994-1997 coincides well with the autocorrelation. Furthermore, it is found that the function of blackout probability vs. blackout size exhibits power law distribution.

关键词： power system Blackout power law Estimation algorithm

Paving the Way to Smart Micro Energy Grid:Concepts,Design Principles,and engineering Practices

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CSEE Journal of power and Energy systems 2017年第4期3卷 440-449页

作者： Shengwei mei Rui Li Xiaodai xue Ying Chen Qiang Lu Xiaotao Chen Carsten D.Ahrens Ruomei Li Laijun Chen state key laboratory of power systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China key laboratory of Clean Energy School of QiDi(TUS)Renewable EnergyQinghai UniversityXining 810016China Faculty of Civil engineering and Geoinformation(BGG) University of Applied SciencesOldenburg D-26203Germany china Electric power Research Institute Beijing 100192China

The interconnection between initially independent energy infrastructures offers additional system flexibility and *** integration at distribution level simplifies the implementation of the integrated energy system *** paper proposes concepts and design principles of a smart micro energy grid(MEG)for accommodating micro-grids,distributed poly-generation systems,energy storage facilities,and associated energy distribution *** energy management system is responsible for the smart operation of the MEG while supporting multiple criteria,such as safety,economy,and environmental *** realize the vision of the smart MEG,an engineering game theory based energy management system with self-approaching-optimum capability is *** on the proposed concepts,design principles,and energy management system,this paper presents a prototype of china’s first conceptual solar-based smart MEG,established in Qinghai university.

关键词： Energy management engineering game theory self-approaching-optimum smart micro energy grid solar-based conceptual prototype

A novel decomposition and coordination algorithm for complex networks and its application to power grids

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控制理论与应用（英文版） 2008年第1期6卷 53-58页

作者： Xiangping NI Shengwei mei The state key lab of power systems Department of Electrical Engineering Tsinghua University Beijing 100084 China

To analyze and control complex networks effectively, this paper puts forward a new kind of scheme, which takes control separately in each area and can achieve the network’s coordinated optimality. The proposed algorithm is made up of two parts: the first part decomposes the network into several independent areas based on community structure and decouples the information flow and control power among areas; the second part selects the center nodes from each area with the help of the control centrality index. As long as the status of center nodes is kept on a satisfactory level in each area, the whole system is under effective control. Finally, the algorithm is applied to power grids, and the simulations prove its effectiveness.

关键词：复杂网络网络结构调和算法电力网络