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An on-line power/voltage stability index for multi-infeed HVDC systems

Journal of Modern Power Systems and Clean Energy 2019年第5期7卷 1094-1104页

作者： Jian XU Tiankai LAN Siyang LIAO Yuanzhang SUN Deping KE Xiong LI Jun YANG Xiaotao PENG School of Electrical Engineering and Automation Wuhan UniversityWuhanChina

High-voltage direct current(HVDC)transmission is playing an increasingly important role in modern power systems,and the resulted power/voltage stability issue has raised widespread *** paper presents an on-line power/voltage stability index(PVSI)for multi-infeed HVDC(MIDC)*** from the existing indices which are developed mainly for off-line and static analysis,the proposed PVSI can be applied in real *** of system changes on stability assessment such as change of system states and control strategies are ***,helpful guidance can be provided for on-line HVDC stability and *** PVSI is originally deduced for single-infeed HVDC systems in an‘‘AC way’’by analyzing the power and voltage stability of both pure AC systems and HVDC ***,its on-line application in practical MIDC systems is realized by building an equivalent single-infeed model,and utilizing nowadays measurement and communication infrastructures such as wide-area measurement system(WAMS).The effectiveness of the PVSI is verified through simulations in real-time digital simulator(RTDS).

关键词： multi-infeed high-voltage direct current(HVDC)system Power stability Voltage stability Stability index Practical on-line application

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HVDC multi-infeed Analysis of the Brazilian Transmission System and Possible Mitigation Methods

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CSEE Journal of Power and Energy Systems 2018年第4期4卷 487-494页

作者： Felipe R.V.de A.Pedroso Marcos T.Bassini Marco A.B.Horita Jose A.Jardini John F.Graham Guijun Liu ITAEE(Technical Institute of Automation and Electrical Studies) Sao PauloSP05502-020 State Grid Brazilian Holding Rio de JaneiroRJ20071-004

The Brazilian transmission system is facing challenging problems with the distance between its generation areas and consumer centers that will be partly solved by the use of HVDC point-to-point *** the near future,the southeast subsystem will have a large amount of power injected through HVDC Systems in multiple points with relatively close electrical ***,the effects of a multi-infeed system are expected to influence the performance and operation of the *** studies and simulations will play an important role in determining the extension of the interactions among HVDC converters and determine if such interactions cause multiple commutation failures,thus disturbing the dynamic stability of the *** use of CCC(Capacitor Commutated Converter)HVDC systems will also be assessed and is expected to diminish the need for a strong AC network(high short circuit level)and,therefore,mitigate multi-infeed *** southeast subsystem of the Brazilian Power System currently has four LCC inverters,two of them belong to the Madeira power plant and the other two are from the Itaipu power *** the year 2024,four other HVDC systems will be arriving in the same *** paper discusses the HVDC multi-infeed phenomena regarding the relevance of using synchronous machine models to represent important power plants and the application of mitigation methods regarding the 2020 network model,where six HVDC links will be present.

关键词： CCC system commutation failure HVDC converters multi-infeed power system dynamic stability

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Research on the Voltage Interaction of multi-infeed HVDC System and Interaction Factor

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Journal of Power and Energy Engineering 2015年第4期3卷 41-48页

作者： Shengjun Zhou Guangyao Qiao Chuan He Wenhui Wang Tianqi Liu State Grid Corporation State Grid Smart Gird Research Institute Beijing 102200 China School of Electrical Engineering and Information Sichuan University Chengdu 610065 China

In multi-infeed HVDC system, the interactions and influences between DC systems AC systems are complex as the electrical distances among DC converter stations which are relatively short. multi-infeed interaction factor (MIIF) can effectively reflect the interaction among DC systems. The paper theoretically analyzes the impact factors of MIIF like the electrical distances between two DC converter stations and the equivalent impedance of the receiving end AC system. By applying the Kirchhoff’s current law on the inverter AC bus, the paper deduces the analytical expressions for MIIF. From the expression, it is clear how the equivalent impedance of AC system and coupling impedance can affect MIIF. PSCAD simulations validate the effectiveness and the correctness of the proposed expression and some useful conclusions are drawn.

关键词： multi-infeed HVDC Inverter Bus Voltage Voltage Interaction Interaction Factor Equivalent Impedance Coupling Impedance

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Quantitative Analysis on Relationship between VDCOL Controller Parameters and Voltage Stability Factor in multi-infeed DC Transmission System

Quantitative Analysis on Relationship between VDCOL Controll...

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作者： Jun XIAO Jian-zong HE You SITU Wei-deng YUAN Ming-hui WU Yong JIA Dongguan Power Supply Bureau of Guangdong Power Grid Co. Ltd. School of Electrical Engineering Chongqing University

Based on the incremental power flow equation,the influence of VDCOL controller parameters on voltage stability factor VSF was studied by sensitivity analysis method,and the mathematical relationship between the two was obtained for the first *** on the analytical relationship,the quantitative relationship between VDCOL control parameters and voltage stability factor VSF was made clear,which lays a mathematical and theoretical foundation for the controller parameters *** CIGRE standard DC system parameters as typical parameters,the relation curve between VDCOL control parameters and VSF was *** with the relation curve,the influence of VDCOL parameters on the system voltage stability was further expounded,and some useful conclusions were *** simulation analysis shows that the method and conclusions obtained in this paper are correct and effective,and have important theoretical guidance and practical significance on the design and operation of the system.

关键词： AC and DC system multi-infeed VDCOL Parameters VSF Voltage stability

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