A mmc topology and control method

A technology of topology structure and control method, which is applied to the output power conversion device, electrical components, and AC power input to DC power output, etc. Effect
CN108880306BActive Publication Date: 2020-01-31ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
Publication Date
2020-01-31

Smart Images

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

Abstract

The invention discloses an MMC topology structure, which is characterized in that it includes three bridge arms of three phases; wherein, the three bridge arms respectively include N+1 sub-modules, N+1 reactances and N sub-module capacitors; The module is composed of two thyristors connected in anti-parallel; one end of the sub-module is connected in series with a reactance, and the other end is connected to the bridge arm where the sub-module is located; the capacitor of the sub-module is respectively connected in series between two adjacent reactances. The MMC topological structure disclosed by the invention can effectively solve the problems of the effective utilization rate of the equipment in the prior art and the high operating cost of the equipment. The embodiment of the invention also discloses a sub-module input control method of the MMC topology and a sub-module removal control method of the MMC topology, which can make the structure control flexible and reliable, and easy to expand.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The invention relates to the technical field of direct current transmission, in particular to an MMC topological structure and a control method. Background technique

[0002] In recent years, as a new type of HVDC transmission technology, HVDC Flexible has the advantages of no commutation failure, power supply to isolated loads, no communication between converter stations, and easy modular design. It has attracted wide attention worldwide. .

[0003] Modular Multilevel Converter (MMC) is the core equipment of flexible direct current transmission. Therefore, it is of great significance to study the optimized topology of MMC and its control strategy.

[0004] In the existing MMC topology, each phase is generally composed of 2N sub-modules. During operation, the upper and lower bridge arms maintain a total of N sub-modules input, and the remaining N sub-modules are in the bypass state. By changing the switching status of the upper and lower bridge arm sub-modules...

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