Power distribution network multi-end flexible interconnection switch based on hybrid submodules MMC

A multi-terminal flexible, sub-module technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problem that the distribution network architecture is difficult to meet environmental protection, power supply reliability and power quality.

Inactive Publication Date: 2017-07-21
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a multi-terminal flexible interconnection switch for a distribution network based on a hybrid sub-module MMC, so...

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  • Power distribution network multi-end flexible interconnection switch based on hybrid submodules MMC
  • Power distribution network multi-end flexible interconnection switch based on hybrid submodules MMC
  • Power distribution network multi-end flexible interconnection switch based on hybrid submodules MMC

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specific Embodiment 1

[0029] Concrete embodiment 1, see appendix figure 1 , the multi-terminal flexible interconnection switch connects the multi-feedback lines containing the distributed power supply through the multi-terminal flexible interconnection switch, and each side of the power supply, MMC converter or distributed power supply is protected by a circuit breaker. Using the multi-terminal flexible interconnection switch, the power supply can be expanded into multiple power supplies (power supply 1, power supply 2, ..., power supply n), and each power supply needs an MMC converter for power supply, so n MMC converters are required ; To improve the utilization of power distribution equipment and reliability of power supply.

[0030] See attached Figure 5 , the present invention is applied to a schematic diagram of the topological structure of a flexible interconnection switch multi-terminal power distribution system with a faulty feeder in a four-terminal system. When a fault occurs somewher...

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Abstract

The invention discloses a power distribution network multi-end flexible interconnection switch based on hybrid submodules MMC. The power distribution network multi-end flexible interconnection switch comprises bypass interconnection switches. Each path of power supply is accessed to a power distribution network through an MMC current converter. The DC sides of the MMC current converters are interconnected. All paths of the power supplies are connected through the bypass interconnection switches. The situation that the present power distribution network framework is difficult to meet the requirements of the user for environmental protection, power supply reliability and electric energy quality can be solved. The technical problems that the conventional power distribution network topological structure, the automatic system and switching equipment are difficult to essentially change the system level uncontrollability of the power distribution network and are not suitable for the diversified power supply modes can be solved.

Description

[0001] Technical field: [0002] The invention belongs to the power supply technology, in particular to a multi-terminal flexible interconnection switch of a distribution network based on a hybrid sub-module MMC. Background technique [0003] In the traditional distribution network, the supplier-led, unidirectional radial power supply-based operation mode is adopted, and the access of distributed power is not deeply considered in the planning, design and management of the distribution network. With the continuous increase of distributed generation (distributed generation, DG) access, the rapid popularization of electric vehicles, and the continuous increase of controllable loads, the existing distribution network architecture has been difficult to meet users' requirements for environmental protection, power supply reliability and Power Quality. Traditional distribution network topology, automation systems and switchgears are difficult to fundamentally change the uncontrollabi...

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Application Information

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IPC IPC(8): H02J3/38H02M7/483
CPCH02J3/381H02M7/483H02M7/4835H02M1/0095
Inventor 徐玉韬谈竹奎肖永徐长宝林呈辉范强刘斌王冕桂军国徐梅梅顾威
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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