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Start-up control method for synchronous condenser connected to inverter side of HVDC transmission

A technology of high-voltage direct current transmission and phase adjustment, which is applied in the direction of AC network circuit, AC network voltage adjustment, electrical components, etc., can solve the problems that voltage compensation has not been studied, and achieve stable state, strong operability and low complexity Effect

Active Publication Date: 2021-06-18
STATE GRID JIANGSU ELECTRIC POWER CO LTD MAINTENANCE BRANCH +3
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  • Claims
  • Application Information

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Problems solved by technology

There is no research on the voltage compensation of the synchronous condenser to the AC-DC transmission system, especially the control method of the synchronous condenser for voltage compensation

Method used

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  • Start-up control method for synchronous condenser connected to inverter side of HVDC transmission
  • Start-up control method for synchronous condenser connected to inverter side of HVDC transmission
  • Start-up control method for synchronous condenser connected to inverter side of HVDC transmission

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] The invention relates to a start-up control method for connecting a synchronous condenser to an inverter side of a high-voltage direct current transmission, and the steps are as follows:

[0031] Step 1. Build a synchronous condenser to start the grid-connected circuit. like figure 1 As shown, the synchronous condenser starts the grid-connected circuit, including: synchronous condenser (Sync_Cond), excitation control system, initial voltage generator, sequence controller, AC three-phase transformer (TF), HVDC inverter side, The AC outlet end of the synchronous condenser is connected to the AC three-phase transformer, and the other side of the AC three-phase transformer is connected to the inverter side of the high-voltage direct current transmission. The rotor side of the synchronous condenser is connected to the timing controller, and the other side of the ti...

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Abstract

The invention discloses a start-up control method for connecting a synchronous condenser to the inverter side of a high-voltage direct current transmission. The method changes the excitation input value of the synchronous condenser at the moment of starting, and enables the exciter to synchronize the synchronous condenser after the system reaches stability for the first time. The excitation input of the condenser is different from the start-up method of the traditional synchronous condenser in that the excitation input value at the moment of start-up is changed. Using the above startup control method can effectively reduce the voltage fluctuation at the port when the synchronous condenser is started, and can reduce the active power consumed and the reactive power generated when the synchronous condenser is started, so that the smooth startup of the synchronous condenser can be realized.

Description

technical field [0001] The invention relates to a start-up control method for connecting a synchronous condenser to an inverter side of a high-voltage direct current transmission, and belongs to the technical field of start-up control of a synchronous condenser. Background technique [0002] With the maturity of long-distance direct current transmission technology, the economy of high voltage direct current transmission has been widely recognized. The country is currently vigorously supporting and promoting the construction of high voltage direct current transmission systems. At the same time, the capacity of direct current transmission systems is also growing rapidly. The safe operation of the DC transmission system requires that the AC grid can provide sufficient reactive power. Compared with the existing static var compensation methods, the advantage of using a synchronous condenser for reactive power compensation is that its reactive power output is not affected by change...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J3/16
CPCH02J3/16H02J3/1885Y02E40/30
Inventor 汤晓峥汪永坤李修金刘一丹施琳王抗田涛喻春雷单哲张志宏张敬王瑶王谱宇刘兴党睿顾伟
Owner STATE GRID JIANGSU ELECTRIC POWER CO LTD MAINTENANCE BRANCH
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