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Multi-terminal high-voltage DC transmission system current converter on-line input method

A high-voltage direct current and power transmission system technology, applied in the direction of power transmission AC network, etc., can solve problems such as converter interference, and achieve the effect of avoiding commutation failure

Inactive Publication Date: 2017-03-29
XUJI GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for online input of converters in HVDC power transmission system, which is used to solve the problem in the prior art that inputting multiple converters in constant voltage mode on the inverter side causes interference to the running converters

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  • Multi-terminal high-voltage DC transmission system current converter on-line input method
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  • Multi-terminal high-voltage DC transmission system current converter on-line input method

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Embodiment Construction

[0016] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0017] An embodiment of an online input method for a multi-terminal HVDC power transmission system converter of the present invention:

[0018] figure 1 Shown is a typical three-terminal parallel DC transmission system, the DC transmission system is a one-to-two mode design, that is, it includes a rectifier station, inverter station 1 and inverter station 2, and the three converter stations are connected in parallel On the same DC bus, the inverter station 1 is provided with a first converter and the second converter, and the inverter station 2 is provided with a third converter and a fourth converter.

[0019] The above-mentioned three-terminal parallel DC transmission system is a bipolar operation mode, such as figure 1 As shown, it is equivalent to a bipolar DC system composed of two sets of unipolar operation modes, the first group of ...

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Abstract

The invention relates to a multi-terminal high-voltage DC transmission system current converter on-line input method. By putting a current converter into operation at one side of an inverter side in a constant DC voltage control mode, and putting current converters into operation at the other sides of the inverter side in a constant current control mode, stable online current converter input can be realized without influencing stable operation of the other current converters. Meanwhile, the method can realize accurate control of transmitting power of the current converters to facilitate a scheduling department and the like to realize control of the transmitting power of the current converters.

Description

technical field [0001] The invention relates to an online input method for a converter of a multi-terminal high-voltage direct current transmission system, belonging to the technical field of direct current transmission. Background technique [0002] In the field of UHVDC power transmission technology, the parallel topology converter has the characteristics of increasing power transmission capacity, enhancing the reliability and flexibility of DC power transmission, and the whole system is easy to insulate and cooperate, and has high operating economy. Specifically, for high-altitude areas in western my country, such as Tibet and Qinghai, affected by altitude factors, the DC transmission capacity can be increased by paralleling converters instead of increasing the DC voltage level; or for a converter failure, It can conveniently exit the faulty converter without interrupting the transmission of DC power; or if a converter has current limitation, it can maintain the entire DC ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 康建爽曹森孙巍峰冯广涛王亚涛刘威鹏李楠王柏恒
Owner XUJI GRP
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