Fault Ride-Through Capability Enhancement Strategy for VSC-HVDC Systems Supplying for Passive Industrial Installations

Bian, Zhipeng; Xu, Zheng

doi:10.1109/tpwrd.2016.2524650

Cited by 25 publications

(11 citation statements)

References 21 publications

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“…Tactics for source‐side active power control and load‐side DC capacitor average voltage control are designed according to their objectives. Detailed derivation would not be presented in this paper since such tactics have been widely used in various devices and can be easily found in other Refs .…”

Section: Control Schemementioning

confidence: 99%

Modeling and Control of Modular Multilevel AC/AC Converter in Y Configuration for Fractional Frequency Transmission System

Meng

Shang

et al. 2020

IEEJ Transactions Elec Engng

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The modular multilevel AC/AC converter topology in Y configuration, which is called Y‐MMC, suitable for fractional frequency transmission system is proposed in this paper. Y‐MMC can directly connect two three‐phase AC systems of different frequencies and voltage amplitudes with only six equivalent branches, and it has satisfying performance in power quality and characteristics. Y‐MMC enjoys a simple and symmetrical structure with no circulating current problem. The detailed topology and operating principle of Y‐MMC are addressed in this paper. The frequency‐decoupled mathematical model of the Y‐MMC system is deduced. Corresponding control scheme is thoroughly designed, including the inner loop current control, the outer loop control, the individual‐balancing control, and frequency leakage suppression control. The paper also lays emphasis on the optimization of reactive power distribution between the main branches and the assistant branches of Y‐MMC. The validity of the Y‐MMC topology and the effectiveness of the proposed control scheme are verified by the simulation results in MATLAB/Simulink. © 2020 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Control Schemementioning

confidence: 99%

Modeling and Control of Modular Multilevel AC/AC Converter in Y Configuration for Fractional Frequency Transmission System

Meng

Shang

et al. 2020

IEEJ Transactions Elec Engng

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“…The limitation of the PI link is found that can be used to improve the fault ride-through capability of VSC-HVDC [22]. In this section, the effect of the PI link limitation on the stability of the inverter is studied.…”

Section: Influence Of Limitation Of Pi On Stabilitymentioning

confidence: 99%

“…Up to now, the regions of asymptotic stability of three‐phase inverters with saturation have not been reported yet. Besides, the limitation of the proportional–integral (PI) link is found to can be used to improve the fault ride‐through capability of voltage‐source converter high‐voltage DC (VSC‐HVDC) [22], and this paper will explain this phenomenon from the perspective of the attraction domain.…”

Section: Introductionmentioning

confidence: 99%

Global asymptotic stability assessment of three‐phase inverters with saturation

Zhu

Liu

Qin

et al. 2018

IET Power Electronics

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Saturation is reported to have a significant influence on the stability of the inverter. In this study, a direct Lyapunov function method to analyse the stability of a three-phase inverter with saturation is presented. The overall model of the threephase inverter is established and the order of the original model is reduced based on the singular perturbation theory. Then the global asymptotic stability assessments of inverters are transformed into linear matrix inequalities problems that are easy to be solved numerically. Through the analysis of this study, it can be proved that the three-phase inverter based on conventional proportional-integral modulation can achieve global stabilisation. The proportional coefficients of the voltage loop have the greatest influence on the stability of the three-phase inverter. Besides, the saturation also has an important effect on the stability of the inverter. The proposed method has some advantages compared with the small-signal analysis. It can quantify the stability degree of the inverter and explain some non-linear phenomena caused by saturation. Simulation developed in PSCAD demonstrates the effectiveness of this method and the results are compared with the real-time digital simulation results implemented in RT-LAB and hardware results.

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“…The outer loop voltage control methods of the Hexverter in an FFTSintegrated wind power system are similar to those of the converter station in an HVDC system. Detailed derivation will not be presented here since such methods have been widely used in various devices and can be easily found in other References [21,22]. Source-side active power control is governed by:…”

Section: Grid-connected Modementioning

confidence: 99%

Control scheme of hexagonal modular multilevel direct converter for offshore wind power integration via fractional frequency transmission system

Meng

Liu²,

Luo³

et al. 2017

J. Mod. Power Syst. Clean Energy

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A fractional frequency transmission system (FFTS) is a promising solution to offshore wind power integration, for which the hexagonal modular multilevel converter (Hexverter) is an attractive choice for power conversion. The Hexverter has recently been proposed to directly connect two three-phase systems of different frequencies and voltage amplitudes, with only six branches in the FFTS in that case. This paper examines for the first time the control scheme of the Hexverter when applied to offshore wind power integration via a FFTS. Firstly, the frequency-decoupled mathematical model of the Hexverter is deduced by introducing the double dq transformation. Then the branch energy of the Hexverter is analyzed in detail and the reactive power constraint equation is obtained. The corresponding control scheme is thoroughly discussed, including the inner loop current control, the outer loop voltage control in both grid-connected mode and passive mode, and a novel optimization method to minimize the circulating current in the Hexverter. Finally, a simulation model of offshore wind power integration via a 4-terminal FFTS based on the Hexverter is built in MATALB/Simulink to verify the feasibility of Hexverter and the effectiveness of the control scheme proposed in this paper.

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Fault Ride-Through Capability Enhancement Strategy for VSC-HVDC Systems Supplying for Passive Industrial Installations

Cited by 25 publications

References 21 publications

Modeling and Control of Modular Multilevel AC/AC Converter in Y Configuration for Fractional Frequency Transmission System

Modeling and Control of Modular Multilevel AC/AC Converter in Y Configuration for Fractional Frequency Transmission System

Global asymptotic stability assessment of three‐phase inverters with saturation

Control scheme of hexagonal modular multilevel direct converter for offshore wind power integration via fractional frequency transmission system

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