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A power coordination control method and device for an lcc-vsc direct current transmission system

A technology of LCC-VSC, DC transmission system, applied in the field of power coordination control, can solve the problem of inability to quickly stabilize the active power of LCC-VSC DC transmission system, and achieve the effect of avoiding active power fluctuations

Active Publication Date: 2020-12-18
XJ ELECTRIC +1
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Problems solved by technology

[0006] The purpose of the present invention is to provide a power coordination control method and device for an LCC-VSC direct current transmission system, which is used to solve the problem that the existing power coordination control method cannot quickly stabilize the entire hybrid when one pole of the LCC end converter station is out of operation. Active Power Problems of Multi-terminal LCC-VSC DC Transmission System

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  • A power coordination control method and device for an lcc-vsc direct current transmission system
  • A power coordination control method and device for an lcc-vsc direct current transmission system
  • A power coordination control method and device for an lcc-vsc direct current transmission system

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Embodiment Construction

[0034] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] figure 1 In the shown hybrid three-terminal LCC-VSC DC transmission system, the control functions of the converter stations at each terminal are arranged in layers, including a DC station control system, a pole-1 pole control system and a pole-2 pole control system. Converter station A includes station A pole 1 control system, station A pole 2 pole control system and station A DC station control system, and converter station B includes station B pole 1 pole control system, station B pole 2 pole control system and station B DC station control system, converter station C includes station C pole 1 pole control system, station C pole 2 pole control system and station C DC station control system. Optical fiber communication is used between the DC station control systems at each end, and optical fiber communication is used between the DC s...

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Abstract

The invention involves a power coordination control method and device for the LCC‑VSC DC transmission system. It belongs to the field of DC transmission technology. When the VSC -end stream of the VSC terminal with a power control mode is extremely suspended, and the VSC terminal changing station is also extremely extremely extremely extremely extremelyWhen the bipolar power control mode is available, the power reference value of the pole is adjusted accordingly according to the bipolar power control mode; when the VSC side changes station is another extremely single pole power control mode, the extremely powerful power reference value isUnchanged; when the control mode of the LCC -side streaming station is a bipolar power control mode, the force switch to the single pole has a power control mode, and the active power reference value of the LCC side stream station is based on the single pole power control according to the single pole power control.The mode is adjusted accordingly; the VSC -end stream stream station of the DC voltage control mode is performed by the adaptive adjustment of the adaptive adjustment.The present invention guarantees that the VSC -end streaming station with a power control mode is stable at the LCC‑VSC DC transmission system when it is shut down to avoid the problem of functional fluctuations.

Description

technical field [0001] The invention belongs to the technical field of direct current transmission, and in particular relates to a power coordination control method and device for an LCC-VSC direct current transmission system. Background technique [0002] At present, the traditional direct current transmission technology (LCC-HVDC) is the most mainstream and mature technology of direct current transmission, which has the advantages of large transmission capacity, good operation stability, small system loss, and low construction cost. has an irreplaceable role. The flexible direct current transmission technology (VSC-HVDC) based on the voltage source converter provides a new development direction for the direct current transmission technology, which can be connected to the passive network, because it does not have the problem of commutation failure, and the voltage harmonic content The output frequency and voltage are stable, the active power and reactive power can be adjus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36H02J13/00
CPCH02J3/36H02J13/00019Y02E60/60
Inventor 宋延涛许梦阳刘旭辉吴庆范刘志军李乾岳笑歌曹森郝俊芳范雪峰孔令凯涂仁川王胜吴东崛王秋开田培涛李亚峰刘晨王长久张绍军许朋见范子强罗磊卢麒
Owner XJ ELECTRIC
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