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Multi-parameter automatic presynchronization control method

A technology of automatic quasi-synchronization and control method, applied in the direction of single-grid parallel feeding arrangement, etc., can solve the problem of unable to meet the stable operation of pumped-storage units under multiple working conditions, shorten the time of synchronizing grid connection, improve service life, reduce Effects of small electrical shocks

Inactive Publication Date: 2009-02-18
华北电网有限公司北京十三陵蓄能电厂
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Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-parameter automatic quasi-synchronization control method in view of the fact that the current automatic quasi-synchronization device can only provide a set of synchronous parameters, which cannot meet the needs of stable operation of pumped storage units in multiple working conditions. Multi-parameter automatic quasi-synchronous grid connection can provide multiple sets of synchronous parameters to realize the stable operation of pumped storage units under multiple working conditions

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[0021] The preferred embodiments are described in detail below in conjunction with the drawings. It should be emphasized that the following description is only exemplary, and is not intended to limit the scope of the present invention and its application.

[0022] figure 1 It is the flow chart of multi-parameter automatic quasi-synchronization control method. In the figure, step 101 is to install a multi-parameter automatic quasi-synchronization device in the existing synchronization control loop. figure 2 It is a schematic diagram of a dual-computer multi-parameter automatic quasi-synchronization device used in the present invention. The device is composed of two parts: hardware and software. The hardware adopts DSP and ARM as the main CPU and auxiliary CPU of the device. The main CPU completes data acquisition, calculation, voltage, frequency adjustment and synchronization capture functions, and the auxiliary CPU completes phase angle blocking, human-computer interaction and c...

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Abstract

The invention discloses a multi-parameter automatic quasi synchronization control method of the electric power system automatic control technology field. The technical scheme is that the multi-parameter automatic quasi synchronization apparatus, where setting the work condition and synchronization parameter, is mounted in the prior synchronization control loop; then the apparatus acquires two-side voltage, and calculates a frequency difference and phase angle difference; synchronization types is captured, and engine speed is regulated; the synchronization condition is judged whether meeting or not based on the different synchronization types combining setting synchronization parameter; when meeting the synchronization condition, a switching-in pulse is sent to implement network-connection; otherwise, the voltage and the frequency are regulated based on traditional PID regulation mode to meet the network-connection condition, and capturing the phase angle difference as well as forecasting the synchronization point, and the network-connection control is implemented ultimately. The invention implements the optimum matching of the synchronization apparatus and the speed governor system, an excitation system, a frequency converter control system; reduces unit network-connection electric impact, and improves the service lifetime of the generators and a GIS combinational switch system.

Description

Technical field [0001] The invention relates to the technical field of automatic control of electric power systems, in particular to a multi-parameter automatic quasi-synchronization control method. Background technique [0002] The automatic quasi-synchronization device is a commonly used automatic control device for controlling and regulating the generator and the grid, or the grid-connected operation between the grid and the grid. Conventional generator sets only have a stable operating condition for generating electricity. The generators are connected to the grid at the same time and use the same method of generating electricity. The synchronization device only needs one set of synchronization parameters. Therefore, the traditional automatic quasi-synchronization device only needs a set of synchronization parameters, and the synchronization conditions mainly consider the power generation synchronization mode, which can meet the needs of most generating sets. In recent years, ...

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Application Information

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IPC IPC(8): H02J3/40
Inventor 施美霖孔祥武孙潇潇吕志娟任志武王春亭樊玉林杨占良谢琛
Owner 华北电网有限公司北京十三陵蓄能电厂
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