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A control system and method based on mmc topology

A technology of topology structure and control system, applied in output power conversion devices, AC network load balancing, electrical components, etc., can solve the problems of heavy calculation burden and communication pressure of the main controller, avoid calculation burden and simplify control. , the effect of reducing costs

Active Publication Date: 2019-06-07
普世通(北京)电气有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above problems, the purpose of the present invention is to provide a control system and method based on the MMC topology, which simplifies the information exchange between the sub-modules and the general controller, so as to solve the problems caused by the balance of the sub-modules in the control system of the existing MMC topology. The technical problem of high communication pressure caused by the control and the large calculation burden of the main controller

Method used

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  • A control system and method based on mmc topology
  • A control system and method based on mmc topology
  • A control system and method based on mmc topology

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Embodiment Construction

[0035] Embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art would recognize that the described embodiments can be modified in various ways or combinations thereof without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Also, in this specification, the drawings are not drawn to scale, and like reference numerals denote like parts.

[0036] Taking the three-phase MMC system topology as an example, combining Figure 4 to Figure 8 Embodiments of the present invention will be described in detail.

[0037] Figure 4 It is a schematic diagram of the control system based on the MMC topology of the present invention, such as Figure 4 As shown, the control system based on the MMC topology of the present invention includes a main controller and a sub-module controller.

[0038]Wher...

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Abstract

The invention discloses a control system based on MMC topology, which includes a main controller and a sub-module controller, wherein the main controller transmits modulation wave information to the sub-module, and the sub-module controller obtains the sub-module modulation according to the local information of the sub-module Wave compensation amount, the modulation wave compensation amount of the sub-module is superimposed with the modulation wave information to realize the balanced control of the sub-module. The invention simplifies the information exchange inside the MMC system, reduces the communication pressure caused by sub-module equalization and the calculation burden of the main controller, and saves cost. The invention also discloses a control method based on the MMC topological structure, which realizes sub-module balance control through the sub-module controller.

Description

technical field [0001] The present invention relates to the technical field of power system operation and control, in particular to a control system and method based on a modular multilevel converter (MMC, Modular Multilevel Converter) topology. Background technique [0002] With the increasing energy crisis and environmental pollution, MMC has attracted widespread attention and applications due to its better power quality, more flexible configuration schemes, and stronger redundancy capabilities. This converter topology has a highly modular structure and strong expansion capabilities, and is widely used in motor drives, static var compensators, electric traction, power electronic transformers, and flexible DC transmission systems. In addition to the conventional use of MMC as a converter topology for HVDC transmission (such as figure 1 As shown), the MMC can also be expanded into an energy storage system to provide power compensation. [0003] figure 1 is a schematic dia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/00H02M7/483H02J3/32
CPCH02J3/32H02M7/00H02M7/483H02M1/0003H02M1/0067
Inventor 荆龙王帅吴学智童亦斌姜久春张维戈
Owner 普世通(北京)电气有限公司
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