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small signal stability analysis of a synchronized control-based microgrid under multiple operating conditions

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Journal of Modern Power Systems and Clean Energy 2014年第3期2卷 244-255页

作者： Zehan LU Zhen WANG Huanhai XIN Kitpo WONG College of Electrical Engineering Zhejiang UniversityHangzhouChina School of Electrical Electronic and Computer EngineeringUniversity of Western AustraliaPerthAustralia

In this paper,a synchronized control strategy of double fed induction generator that can provide reserve capability and primary frequency support for microgrid is firstly *** microgrid based small signal stability performance is investigated under multiple operating *** effect of three categories of key controller parameters on dominant eigenvalues is studied by sensitivity analysis,including:1)active power drooping coefficient;2)reactive power drooping coefficient;3)parameters of outer loop excitation current ***,some constructive suggestions on how to tune controller parameters to improve microgrid’s small signal stability performance are discussed.

关键词： Microgrid Synchronized control DFIG small signal stability Eigenvalues analysis

C-Vine Pair Copula Based Wind Power Correlation Modelling in Probabilistic small signal stability Analysis

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IEEE/CAA Journal of Automatica Sinica 2020年第4期7卷 1154-1160页

作者： Jin Xu Wei Wu Keyou Wang Guojie Li the Key Laboratory of Control of Power Transmission and Conversion Ministry of EducationDepartment of Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The increasing integration of wind power generation brings more uncertainty into the power system. Since the correlation may have a notable influence on the power system,the output powers of wind farms are generally considered as correlated random variables in uncertainty analysis. In this paper, the C-vine pair copula theory is introduced to describe the complicated dependence of multidimensional wind power injection, and samples obeying this dependence structure are generated. Monte Carlo simulation is performed to analyze the small signal stability of a test system. The probabilistic stability under different correlation models and different operating conditions scenarios is investigated. The results indicate that the probabilistic small signal stability analysis adopting pair copula model is more accurate and stable than other dependence models under different conditions.

关键词： Monte Carlo simulation pair copula small signal stability wind power correlation

Dynamics and small signal stability Analysis of PMSG-based Wind Farm with an MMC-HVDC System

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CSEE Journal of Power and Energy Systems 2020年第1期6卷 226-235页

作者： Yifan Wang Chengyong Zhao Chunyi Guo Atiq Ur Rehman The State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China

The permanent magnet synchronous generator (PMSG)-based wind farm with a modular multilevel converter (MMC) based HVDC system exhibits various oscillations and can experience dynamic instability due to the interactions between different controllers of the wind farm and MMC stations, which have not been properly examined in the existing literatures. This paper presents a dynamic modeling approach for small signal stability analysis of PMSG-based wind farms with a MMC- HVDC system. The small signal model of the study system is validated by the comprehensive electromagnetic transient (EMT) simulations in PSCAD/EMTDC. Then the eigenvalue approach and participation factors analysis are utilized to comprehensively evaluate the impact of different controllers, system’s parameters and the circulating current suppressing controller (CCSC) on the small signal stability of the entire system. From eigenvalue analysis, it is revealed that as the output active power of the wind farm increases within the rated range, the overall system will exhibit a sub-synchronous oscillation (SSO) instability mode, an extremely weak damping mode, and a low frequency oscillation instability mode. From participation factors analysis, it is observed that the SSO mode and weak damping mode are primarily related to the internal dynamics of the MMC, which can be suppressed or improved by CCSC. It is determined that the low frequency oscillation mode is primarily caused by the interactions between the phase locked loop (PLL) control of the wind farm and the voltage and frequency (V-F) control of the MMC station. The analysis also depicts that the larger proportional gain value of the V-F control of the MMC station and smaller PLL bandwidth of the wind farm can enhance the small signal stability of the entire system.

关键词： HVDC modular multilevel converter(MMC) permanent magnet synchronous generator(PMSG) small signal stability sub-synchronous oscillation(SSO) wind farm

Coordination of PSS and FACTS Damping Controllers to Improve small signal stability of Large-scale Power Systems

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CSEE Journal of Power and Energy Systems 2019年第4期5卷 507-514页

作者： Guangzheng Yu Tao Lin Jiannan Zhang Ye Tian Xiu Yang Shanghai University of Electric Power ShanghaiChina Electrical Engineering School Wuhan UniversityWuhanChina Zhumadian Power Supply Company of Henan Electric Power Company ZhumadianChina Central China Electric Power Dispatching and Commu-nication Center WuhanChina

This paper presents an approach for designing parameters of power system stabilizer(PSS)and FACTS damping controllers in a large scale practical power *** objective is maximizing damping ratio of the target mode,and tracking technology(MTT)is used to avoid frequent alternations of target mode in optimization *** improved planted growth simulation algorithm(IPGSA),which has high search efficiency and quick convergence speed,is proposed to optimize controller parameters *** on case study of a large-scale power grid,and by using local and interregional low-frequency oscillation modes as target modes,simulation results verify proposed method in this ***,coordination optimization strategy adapted to multi-operating conditions demonstrates that the proposed approach is robust.

关键词： Coordinating optimization large-scale power grid mode tracking technology PSS and FACTS damping controllers small signal stability

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 ...

Coordination of PSS and TCSC controller using modified particle swarm optimization algorithm to improve power system dynamic performance

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

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浙江大学学报C辑：计算机与电子（英文版） 2010年第8期11卷 645-653页

作者： Alireza REZAZADEH Mostafa SEDIGHIZADEH Ahmad HASANINIA Faculty of Electrical and Computer Engineering Shahid Beheshti University Faculty of Engineering and Technology Imam Khomeini International University

This paper develops a modified optimization procedure for coordination of a power system stabilizer (PSS) and a thyristor controlled series compensator (TCSC) controller to enhance the power system small signal *** new approach employs eigenvalue-based and time-domain simulation based objective functions simultaneously to improve the optimization convergence rate.A modified particle swarm optimization (MPSO) algorithm is used as the optimization *** results of simulations and eigenvalue analysis for a single machine infinite bus (SMIB) system equipped with the proposed PSS and TCSC controllers confirm that the new approach is effective in enhancing the system stability.

关键词： Coordination Particle swarm optimization (PSO) Power system stabilizer (PSS) small signal stability Thyristor controlled series compensator (TCSC) controller

Periodic orbit model of diode rectifiers-synchronous machine system

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Science China(Technological Sciences) 2013年第1期56卷 245-252页

作者： WANG Gang FU LiJun FAN XueXin YE ZhiHao MA Fan National Key Laboratory for Vessel Integrated Power System Technology

Diode rectifiers-synchronous machine system has a wide range of applications in isolated power system,whose low frequency oscillation emerges under certain *** error is produced when the state space averaging model is used to analyze its small signal ***,this paper has presented a periodic orbit model of diode rectifiers-synchronous machine system to solve these *** trapezoidal integration method,it is possible to derive equation of periodic orbit and its Poincaré *** matrix of the Poincaré mapping of periodic orbit can be calculated by chain derivative ***,stability margin index and linearized Poincaré mapping model have also been *** small signal stability of diode rectifiers-synchronous machine system can be assessed through orbitally asymptotical stability of its periodic orbit so as to lay a foundation for isolated power system analysis and its control *** test demonstrates that the proposed model and algorithm are effective and practicable.

关键词： power system diode rectifiers-synchronous machine system small signal stability modeling periodic orbit

A Possible Configuration with Motor-generator Pair for Renewable Energy Integration

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CSEE Journal of Power and Energy Systems 2017年第1期3卷 93-100页

作者： Siming Wei Yingkun Zhou Song Li Yongzhang Huang State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China

High penetration rates of renewable energy will bring stability problems for the future power *** of the critical issues is lack of *** this paper,a synchronous motor-generator pair(MGP)system is proposed as a possible solution for renewable energy integration to enhance inertia and improve grid ***,feasibility studies of MGP on inertia,damping,efficiency,and cost are ***,an analytical model is established based on its rotor angle *** active power control scheme based on voltage phase difference between renewable energy source and grid is then proposed,and state equations of MGP are derived for small signal ***,two experiments are designed and implemented to verify stable operation and active power regulation of the MGP system.A single-machine infinite bus system is tested to investigate small signal stability and frequency response of *** results show that the MGP system has a solid base in physics and is a feasible solution for providing enough inertia and improving small signal performance in the power grid with high penetration of renewable *** paper concludes with a discussion on future research directions to gain a better understanding of MGP.

关键词： Active power control high penetration of renewable energy inertia motor-generator pair(MGP) small signal stability