Z
Zheren Zhang
Researcher at Zhejiang University
Publications - 69
Citations - 844
Zheren Zhang is an academic researcher from Zhejiang University. The author has contributed to research in topics: Computer science & Engineering. The author has an hindex of 9, co-authored 45 publications receiving 564 citations.
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Assembly HVDC Breaker for HVDC Grids With Modular Multilevel Converters
TL;DR: In this article, an assembly HVDC breaker and the corresponding control strategy are proposed to overcome the drawbacks of dc-side short-circuit fault in MMC with half-bridge submodules.
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Force commutated HVDC and SVC based on phase-shifted multi-converter modules
TL;DR: In this paper, the authors examined how presently available gate-turn-off thyristors (GTOs), which are still relatively slow, can be used in force-commutated HVDC and static VAR compensator (SVC) converters by employing multiconverter modules in conjunction with a phase-shifting principle which cancels the undesirable switching harmonics.
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DC-Side Harmonic Currents Calculation and DC-Loop Resonance Analysis for an LCC–MMC Hybrid HVDC Transmission System
TL;DR: In this paper, the authors presented a method for dc-side harmonic current calculation and dc-loop impedance calculation for an LCC-MMC hybrid HVDC transmission system with reverse current blocking diodes.
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Selection methods of main circuit parameters for modular multilevel converters
TL;DR: In this article, the authors analyzed the parameter design problem of several important elements in the main circuit of the modular multilevel converter (MMC), such as the link transformer, the arm reactor, the sub-module (SM) capacitor and the SM power electronic devices.
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Valve Losses Evaluation Based on Piecewise Analytical Method for MMC–HVDC Links
TL;DR: In this article, a new method based on piecewise analytical formulas to evaluate the valve losses of the modular multilevel converter based high-voltage direct current (MMC-HVDC) transmission systems is presented.