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Method and system for distributing reactive power compensation devices in multi-infeed systems

A compensation device and multi-feed technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve problems such as secondary commutation failure between stations, unstable power supply system, commutation failure, etc. To achieve the effect of optimizing the coupling relationship and maximizing economic benefits

Active Publication Date: 2019-06-21
XJ ELECTRIC +3
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Problems solved by technology

However, when the power grid in the multi-infeed DC area is weak and the electrical coupling relationship between the multi-infeed points is strong, (continuous) commutation failures and secondary commutation failures between stations are prone to occur, resulting in instability of the power supply system , which has seriously affected the healthy and rapid economic development of the receiving regions

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  • Method and system for distributing reactive power compensation devices in multi-infeed systems
  • Method and system for distributing reactive power compensation devices in multi-infeed systems
  • Method and system for distributing reactive power compensation devices in multi-infeed systems

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Embodiment Construction

[0042] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0043] Embodiment of the method for laying out reactive power compensation devices in the multi-infeed system of the present invention

[0044] The present invention first calculates the node sensitivity, and then accumulates and ranks the sensitivity of each node in the receiving-end AC power grid of the multi-feed DC system according to a certain weight, and the higher the ranking, it shows that the installation of the reactive power compensation device here will reduce the impact of each commutation The coupling effect between stations is the most obvious, the improvement of system performance can be the most obvious, and the economic benefits can also be maximized. Therefore, taking this ranking as the priority of reactive power compensation devices can minimize the interaction between converter stations. The procedure of this method is ...

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Abstract

The invention relates to a point distribution method and system of a reactive power compensation device in a multi-infeed system, and belongs to the technical field of high-voltage direct current transmission. According to the interaction effect factors between every two converter stations before and after the reactive power compensation device is added, the sensitivity of each node to the converter station interaction effect factors is calculated, the sensitivity of all the nodes to the interaction effect factors is ranked, and therefore the priority of installation positions of the reactive power compensation device is determined. According to the method and the system, the sensitivity of the nodes is made use of for point distribution of the reactive power compensation device, the influence of an alternating current side network structure on the current commutating bus interaction effect factor is considered, the influence of the compensation characteristic of the reactive power compensation device on the current commutating bus interaction effect is also considered, and therefore the coupling relationship between every two current commutating buses is optimally improved in the whole.

Description

technical field [0001] The invention relates to a method and system for arranging reactive power compensation devices in a multi-infeed system, and belongs to the technical field of high-voltage direct current transmission. Background technique [0002] my country's East China and South China are the two regions with the largest power demand in the country, and they are also the location of multiple DC transmission lines, which has also made these two regions have formed a pattern of multi-infeed DC transmission. In the future, with the further development of the economy, the construction of more conventional UHV DC transmission lines and the multi-infeed DC transmission pattern will become the new normal. However, when the power grid in the multi-infeed DC area is weak and the electrical coupling relationship between the multi-infeed points is strong, (continuous) commutation failures and secondary commutation failures between stations are prone to occur, resulting in insta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 胡丁文王先为吴金龙张军刘欣和冯宇鹏李道洋马焕
Owner XJ ELECTRIC
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