Design, control and application of modular multilevel - download pdf or read online

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

ISBN-10: 1118851528

ISBN-13: 9781118851524

ISBN-10: 1118851544

ISBN-13: 9781118851548

ISBN-10: 1118851552

ISBN-13: 9781118851555

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

Separated into 3 certain elements, the 1st deals an summary of MMC know-how, together with info on converter part sizing, regulate and communique, safeguard and Fault administration, and widespread Modelling and Simulation. the second one covers the purposes of MMC in offshore WPP, together with making plans, technical and financial requisites and optimization suggestions, fault administration, dynamic and temporary balance. eventually, 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 rationalization of MMC program in HVDC and MTDC transmission technology.
  • Detailed description of MMC parts, regulate and modulation, assorted modeling ways, converter dynamics less than 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 security applied sciences, process reviews required for the combination of HVDC terminals to offshore wind strength crops, and commissioning methods for onshore and offshore HVDC terminals.
  • A set of self-explanatory simulation types for HVDC try circumstances is on the market to obtain from the spouse website.

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

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Extra resources for Design, control and application of modular multilevel converters for HVDC transmission systems

Sample text

Throughout the cycle, it is assumed that the ac-side current is directed out of the terminal as indicated by the arrow. Initially, in stage (a), the upper switch is conducting and the ac-terminal potential ????s equals that of the positive dc rail, +Vd ∕2. In stage (b), the upper switch is gated off and the current is forced to instead start flowing through the lower diode since this is the only available path for a current in the given direction. When the current has fully commutated to the lower diode, stage (c), the potential at the ac terminal instead coincides with that of the negative dc terminal −Vd ∕2.

This would be a way of creating a variable energy storage with an ac terminal. In such a case there can be a nonzero term in the power flow to or from the string, amounting to the power exchange with the battery. 15) will ensure that the stored energy of the submodule string does not change over a fundamental cycle. Generally, different forms of closed-loop control are required to maintain this balance. For a converter based on submodule strings it is usually convenient to split the power balancing problem into two parts, which are addressed separately.

Thus, the creation of additional ac voltage levels is made possible. The three-level variant is referred to as a neutral point clamped (NPC) converter since the clamping diodes in this case can link the ac terminal to the midpoint (which may be of neutral potential) of the dc link. This was also the name used in [1] which did not cover the extension to more than three levels. The NPC converter is the only diode clamped converter that has met significant commercial success. Although the concept is extendable to four or more levels, as shown in the figure, this has in most cases not been feasible in terms of cost.

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Design, control and application of modular multilevel converters for HVDC transmission systems by Kamran Sharifabadi, Lennart Harnefors, Hans-Peter Nee, Staffan Norrga, Remus Teodorescu

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