Method for designing MMC-HVDC controller

A design method and controller technology, applied in the direction of AC network circuits, circuit devices, power transmission AC networks, etc., can solve the problems of poor robustness of dynamic response performance, etc., and achieve strong dynamic response ability, chattering suppression, and easy parameters Effect
CN109524980AActive Publication Date: 2019-03-26TIANJIN UNIV
5 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2019-03-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for designing a MMC-HVDC controller. The method comprises the steps of (1) establishing a mathematical model of a MMC in a synchronous rotating coordinate system withthe combination of the working principle of a MMC-HVDC, (2) designing a unified inner loop current controller based on sliding mode variable structure control with the combination of the mathematicalmodel of the MMC, (3) designing a DC voltage controller model, (4) designing a power controller model, and (5) designing a DC voltage droop controller model. Compared with the prior art, the method has the advantages of simple algorithm, high control precision, strong dynamic response ability to a direct current transmission system, good stability, easy parameter debugging, strong robustness and low dependence on the mathematical model of the system, and on the other hand, the method has important application significance to promote the development of related industries.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of direct current transmission of power systems, and more specifically relates to a design method of an MMC-HVDC controller based on sliding mode variable structure control technology. Background technique

[0002] Compared with the traditional two- and three-level VSC converters, the modular multilevel converter (MMC) with multi-module series design and step wave approximation technology has the advantages of high waveform quality, low switching frequency and low loss cost. It has the advantages of low multiplier reduction, low manufacturing difficulty, strong fault handling capability, and good scalability. It has received widespread attention in the field of high-voltage direct current transmission (HVDC) and is increasingly used in actual direct current transmission projects. middle.

[0003] MMC is an important part of DC transmission system, and its control strategy is crucial to the stable operation of the who...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More