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Transient stability and emergency control

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Science China(Technological Sciences) 2009年第2期52卷 420-428页

作者： ZHANG XueMin mei shengwei WU ShengYu State Key Lab of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084China

Comparability of emergency control strategies with different instability modes is the key issue to decide which control strategy to be implemented. This paper considers that the essential factor causing instability should be used to form a unified standard to assess the effectiveness of control strategies with different instability modes. Thus a switching control stabilization principle was proposed based on elimination of the unbalanced energy between mechanical and electrical energies of generator sets. Along this way, the difficulty of seeking a Lyapunov function was circumvented. According to the principle, an emergency control algorithm framework was established to handle transient stability assessment, control location selection and control amount evaluation. Within the framework, this paper studied instability mode transition, then proposed an algorithm based on prediction function and a new approach to normalized stability margin stemmed from static EEAC method, which can increase comparability of various control locations. The simulations on the New-England System verified the proposed emergency control method for stabilizing transient stability.

关键词： emergency control switching system unbalanced energy

Research focuses and advance technologies of smart grid in recent years

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Chinese Science Bulletin 2012年第22期57卷 2879-2886页

作者： mei shengwei CHEN LaiJun State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Department of'Electrical EngineeringTsinghuaUniversityBeijing 100084China

The smart grid is attracting more and more attention in electrical engineering for its promising ***,huge challenges also exist in the implementations of the smart grid,such as high penetration of renewable energy resources,low carbon electricity and cyber-physical security,*** this paper,the latest progress of some research focuses and advance technologies in the development of smart grid is reviewed.

关键词：电网智能技术网络物理安全可再生能源电气工程渗透力

考虑资源相关性的新能源场站群集中式共享储能优化配置

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太阳能学报 2024年第7期45卷 2-9页

作者：孙英聪陈来军李笑竹梅生伟清华大学电机工程与应用电子技术系北京100084 青海大学新能源光伏产业研究中心西宁810016

针对区域内新能源场站群联合出力场景的集中式共享储能配置规划问题,提出考虑资源相关性,即风光出力互补特性、各新能源场站出力空间相关性的新能源场站群共享储能优化配置策略。该策略首先利用Copula方法进行典型场景生成,以剖析风光... 详细信息

针对区域内新能源场站群联合出力场景的集中式共享储能配置规划问题,提出考虑资源相关性,即风光出力互补特性、各新能源场站出力空间相关性的新能源场站群共享储能优化配置策略。该策略首先利用Copula方法进行典型场景生成,以剖析风光资源的相关性与互补性;在此基础上,建立新能源场站群集中式共享储能的优化配置模型,以实现多主体间储能的共享与互补利用,同时尽可能利用风光资源的相关性。最后通过仿真分析验证所提方法的正确性和有效性。

关键词：新能源储能相关性方法风光互补特性空间相关性

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Real-time electromagnetic transient simulation algorithm for integrated power systems based on network level and component level parallelism

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Science China(Technological Sciences) 2012年第11期55卷 3232-3241页

作者： CHEN LaiJun CHEN Ying mei shengwei State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments(Department of Electrical Engineering Tsinghua University)Beijing 100084China

The analysis and simulation of power system are becoming more and more challenging as the complexity of system topology and components has been increased. In this paper, a hybrid parallel algorithm is proposed for the real-time electromagnetic transient simulation （EMTS） of integrated power systems containing multiphase machines. The proposed algorithm is com- posed of a novel network partition method called component level parallelization and the Multi-Area Thevenin Equivalent （MATE） method, which extends the flexibility of the network partition in parallel simulation. Moreover, several methods are developed to enhance the efficiency of the communication and computation. Power systems with up to 410 single-phase elec- trical nodes and 336 switches are simulated in a time step of 50 ~ts to validate the proposed algorithm.

关键词： EMTP multiphase machine network partition parallel computing power system real-time simulation

On engineering game theory with its application in power systems

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Control Theory and Technology 2017年第1期15卷 1-12页

作者： shengwei mei Wei WEI Feng LIU Department of Electrical Engineering and Applied Electronics Technology Tsinghua Universily Beijing 100084 China State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Beijing 100084 China

Due to its capability of solving decision-making problems involving multiple entities and objectives, as well as complex action sequences, game theory has been a basic mathematical tool of economists, politicians, and sociologists for decades. It helps them understand how strategic interactions impact rational decisions of individual players in competitive and uncertain environment, if each player aims to get the best payoff. This situation is ubiquitous in engineering practices. This paper streamlines the foundations of engineering game theory, which uses concepts, theories and methodologies to guide the resolution of engineering design, operation, and control problems in a more canonical and systematic way. An overview of its application in smart grid technologies and power systems related topics is presented, and intriguing research directions are also envisioned.

关键词： Decision making engineering game theory power system smart grid technology

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

On expansion of estimated stability region:Theory,methodology,and application to power systems

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Science China(Technological Sciences) 2011年第6期54卷 1394-1406页

作者： LIU Feng WEI Wei mei shengwei State Key Laboratory of Power Systems Department of Electrical Engineering Tsinghua University 100084 Beijing China

The expansion of the estimated stability region plays an important role in the stability analysis of nonlinear ***,current literatures have not provided a complete mathematical description for this *** paper reveals that essentially the enlargement or the compression of the estimated stability region results directly from the diffeomorphism map,which is induced by the flow contained in the stability *** proving that any integration algorithm with an order higher than one can approximately trace the flow of the system,a generalized methodology is proposed to construct various algorithms to realize the enlargement or the compression of the estimated stability *** this methodology,two new algorithms based on symbolic calculation are suggested to reduce the computational ***,this methodology is applied to construct a scalable numerical algorithm to calculate the critical clearing time(CCT) of the power system for given *** on the IEEE 10-machine 39-bus system show that the computational results coincide well with the step-by-step simulation with high accuracy.

关键词： nonlinear system stability region power systems transient stability analysis

New research advancement in electrical engineering field of China-Reviews on special issue of Science in China Series E:Technological Sciences

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Chinese Science Bulletin 2009年第8期54卷 1285-1286页

作者： mei shengwei MA Jin State Key Laboratory of Power System Department of Electrical Engineering Tsinghua University Beijing 100084 China Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control of Ministry of Education North China Electric Power University Beijing 102206 China

Based on,but not limited to the research results of electrical engineering published in the special issue of Science in China Series E,June 2008,this essay gives a brief review on a wide range of state-of-art advancement in electrical engineering field of China,which includes power system modeling,analysis and control,risk assessments in power system,etc.

关键词：电气工程工程领域技术科学电力系统研究成果中国科学系统建模风险评估

Field experiments of NR-PSS for large synchronous generators on a 300MW machine in Baishan Hydro Plant

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Science China(Technological Sciences) 2007年第4期50卷 516-520页

作者： LU Qiang mei shengwei ZHENG ShaoMing State Key Lab of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China

To verify the performance of NR-PSS (Nonlinear Robust Power System Stabilizer) for large synchronous generators, field experiments were carried out on a 300 MW generator in Baishan Hydro Plant of Northeast China Power Grid. The experiment results show that NR-PSS can improve the generator damping and enhance system stability remarkably.

关键词： nonlinear robust power system stabilizer large synchronous generators field experiment