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Multi-port UPFC topology and appropriate configuration and control method thereof

A multi-port, topology technology, applied in AC networks of the same frequency with different sources, flexible AC transmission systems, reducing/preventing power oscillations, etc. The effect of flexibility, broad industry promotion prospects and strong control ability

Active Publication Date: 2016-08-24
XJ ELECTRIC +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a multi-port unified power flow controller topology and its DC voltage coordination control method to solve the contradiction between power flow control of transmission lines and flexible partition interconnection of power grids

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  • Multi-port UPFC topology and appropriate configuration and control method thereof
  • Multi-port UPFC topology and appropriate configuration and control method thereof
  • Multi-port UPFC topology and appropriate configuration and control method thereof

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] figure 1 The multi-port UPFC topology is given: the parallel side includes n parallel-side VSC converters, which are respectively connected to n AC partition grids; the series side includes m series-side VSC converters, which are respectively connected in series to m AC transmission lines In the number of circuits, the VSC converters on the parallel side and the VSC converters on the series side are connected through the DC bus.

[0029] Among them, n and m represent quantity, both of which are greater than 1. Hereinafter, the VSC converter is also simply referred to as VSC.

[0030] In addition, the VSC converter on the series side and the VSC on the parallel side may adopt a traditional three-phase full-bridge structure, a multi-level structure or an MMC structure.

[0031] The parallel side contains multiple VSCs. First, it can jointly support th...

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Abstract

The invention relates to a multi-port UPFC topology and appropriate configuration and control method thereof. A parallel side of the multi-port UPFC topology structure comprises a plurality of voltage source type converters which can commonly support the direct current voltage to maintain stabilization at first so as to provide a good running condition for a VSC at a UPFC series side, and realize the flexible division and interconnection of the alternating current power grid at the second and then provide dynamic reactive compensation for the alternating current power grid; the series side comprises a plurality of VSC for performing optimal power flow deployment, oscillation damping inhibition and transient stability control. The multi-port UPFC is cooperatively controlled through the direct current voltage and has the obvious advantages of being flexible in running mode, strong in control ability and high in system reliability, and has wide industry promotion prospect.

Description

technical field [0001] The invention belongs to the field of high-voltage alternating current transmission, and specifically relates to a multi-port UPFC topology, and a configuration and control strategy applicable to the multi-port UPFC. Background technique [0002] Since the reform and opening up, my country's economy has grown rapidly, and electricity, as the energy support for economic growth, has developed rapidly. Due to the large-scale and high-speed growth of electricity, the grid structure has become more and more complicated. The prominent problems brought about are: uneven distribution of power flows and It is difficult to regulate and control, and there is a risk of overload and instability in some lines after AC grid N-1. [0003] On the other hand, the AC power grid also has the outstanding contradiction of unclosed loop operation. In order to improve the reliability of grid power supply and mutual power supply, the AC grid needs to be operated in a closed loo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36H02J3/06H02J3/24H02J3/18
CPCH02J3/06H02J3/18H02J3/24H02J3/36Y02E40/10Y02E60/60
Inventor 吴金龙姚为正范彩云王先为刘欣和冯宇鹏李道洋
Owner XJ ELECTRIC