Download Design, control and application of modular multilevel by Kamran Sharifabadi, Lennart Harnefors, Hans-Peter Nee, PDF

By Kamran Sharifabadi, Lennart Harnefors, Hans-Peter Nee, Staffan Norrga, Remus Teodorescu

Design, keep an eye on and alertness of Modular Multilevel Converters for HVDC Transmission Systems is a finished advisor to semiconductor applied sciences acceptable for MMC layout, part sizing keep watch over, modulation, and alertness of the MMC expertise for HVDC transmission.

Separated into 3 designated components, the 1st bargains an outline of MMC know-how, together with details on converter part sizing, keep an eye on and communique, security and Fault administration, and general Modelling and Simulation. the second one covers the purposes of MMC in offshore WPP, together with making plans, technical and financial necessities and optimization concepts, fault administration, dynamic and brief balance. ultimately, the 3rd bankruptcy explores the functions of MMC in HVDC transmission and Multi Terminal configurations, together with Supergrids.

Key features:

  • Unique insurance of the offshore software and optimization of MMC-HVDC schemes for the export of offshore wind power to the mainland.
  • Comprehensive clarification of MMC program in HVDC and MTDC transmission technology.
  • Detailed description of MMC parts, keep an eye on and modulation, assorted modeling ways, converter dynamics below steady-state and fault contingencies together with software and housing of MMC in HVDC schemes for onshore and offshore.
  • Analysis of DC fault detection and safeguard applied sciences, method experiences required for the combination of HVDC terminals to offshore wind strength vegetation, and commissioning systems for onshore and offshore HVDC terminals.
  • A set of self-explanatory simulation versions for HVDC try instances is offered to obtain from the spouse website.

This publication offers crucial examining for graduate scholars and researchers, in addition to box engineers and execs who require an in-depth knowing of MMC technology.

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Additional info for Design, control and application of modular multilevel converters for HVDC transmission systems

Example text

8. 8 Three-level active neutral point clamped converter. One phase leg shown. of control. More specifically, a three-phase ANPC phase leg offers more ways of implementing the zero-voltage state. This allows for a more even distribution of the losses among the semiconductors. The ANPC converter has been used in two significant VSC HVDC projects, the Cross-Sound Cable and the Murray link [3, 4]. 2 Flying Capacitor Converters A further multilevel converter topology is the so-called flying capacitor converter, first presented in 1992 [5].

7), which was derived for a two-level converter. For the two-level case these pulsations normally cancel out between the phase legs and therefore do not give rise to voltage ripple in the dc link. In an MMC, on the other hand, both the fundamental and second harmonic power ripple normally need to be absorbed by the submodule capacitors resulting in significant voltage ripple.

This is vital, since it implies that the amplitude of the harmonics can be reduced. Second, every semiconductor valve is not involved in every transition of the output Design, Control, and Application of Modular Multilevel Converters 16 voltage. This implies that the frequency at which the output voltage is changed can be increased without increasing the switching frequency. Thereby, the first harmonics in the spectrum will appear at higher frequency where they can be more easily filtered out. 5 the impact of a transition from the use of two-level to multilevel converter topologies is illustrated in the time and frequency domains.

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