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Direct-current energy dynamic adjusting system and control method

A technology of dynamic adjustment and control method, applied in the direction of DC network circuit devices, electrical components, circuit devices, etc., can solve the problems of high cost and increased failure probability, and achieve the effect of improving communication reliability

Active Publication Date: 2021-02-26
NR ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, because the above problems cannot be solved in the prior art, it is necessary to adopt a point-to-point communication method with higher cost
However, the point-to-point method introduces more communication ports and communication links, and the probability of failure increases

Method used

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  • Direct-current energy dynamic adjusting system and control method

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with accompanying drawing.

[0043] Such as figure 1 Shown is the first embodiment of the present invention, a DC energy dynamic adjustment system, the system includes N voltage equalization energy consumption modules 1 connected in series in the same direction, N is an integer greater than or equal to 2; wherein the voltage equalization energy consumption The module includes a parallel connection between a DC capacitor 3 and an energy-consuming branch, and the energy-consuming branch is formed by connecting a first power semiconductor device 2 and an energy-consuming resistor 4 in series; the voltage-equalizing energy-consuming module also includes a bypass switch 5, so The bypass switch is connected in parallel with the first power semiconductor device; the system also includes M sub-module control units 7 and a main control unit 11, M≤N; the sub-module control unit includes at least two communicati...

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Abstract

The invention discloses a direct-current energy dynamic regulation system, and the system comprises N voltage-sharing energy consumption modules connected in series in the same direction, and furthercomprises N sub-module control units and a main control unit; the communication units of the M sub-module control units are connected in series and then connected with the communication unit of the main control unit, wherein M is smaller than or equal to N. The invention further comprises a control method of the system. According to the system and the method, communication networking of the direct-current energy dynamic adjustment system is realized in a low-cost mode, equipment body redundancy is replaced by communication configuration redundancy, the reliability of the system is improved, and the cost performance of the whole scheme is high.

Description

technical field [0001] The invention belongs to the technical field of high-power electric current conversion, and in particular relates to a DC energy dynamic adjustment system and a control method. Background technique [0002] In the HVDC transmission system, the DC energy dynamic adjustment system is applied to the application occasions of HVDC energy consumption, and the HVDC energy consumption is mainly used in the application scenarios of island power supply. When a fault occurs, because the power cannot be sent out, energy will be accumulated on the DC side, causing the voltage of the DC transmission line to rise, which will endanger the safe operation of the equipment. [0003] Existing high-voltage DC transmission technology or DC energy consumption technology adopts modular multi-level technology, and the system contains a large number of sub-modules and power semiconductor devices. In order to ensure the reliability of control and communication, the control syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00
CPCH02J1/00H02J13/00
Inventor 谢晔源王宇姜田贵李海英曹冬明
Owner NR ELECTRIC CO LTD