A power generation system based on a brushless doubly-fed generator and its excitation method
A doubly-fed generator and power generation system technology, applied in the direction of controlling generators, control systems, electrical components, etc., to achieve good stability, high reliability, and high operating efficiency
Inactive Publication Date: 2015-08-19
三垦力达电气(江阴)有限公司
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It can be seen from the figure that the rectifier and inverter unit 7' has always been connected to the power grid, and the excitation work is to obtain electric energy from the power grid to complete the excitation of the rotor winding 22', so it cannot operate independently of the power grid
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[0036] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.
[0037] The power generation system based on the brushless doubly-fed generator of the present invention is as figure 2 As shown, it is used to supply power to load 1. The power generation system mainly includes:
[0038] A brushless double-fed generator 2 including a power winding 22 and a control winding 21; a first contactor 4 connected to the power winding 22; a circuit breaker 5 connected between the first contactor 4 and the load 1; a The frequency converter 6 includes a first AC terminal connected to the control winding 21 and a first DC terminal; a rectification and inverter unit 7 comprising a first DC terminal connected to the frequency converter 6 through a DC bus 8 A second DC terminal and a second AC terminal; a second contactor 9 connected between the first AC terminal of the frequency converter 6 and the power winding 22; an auxilia...
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The invention provides a power generation system based on a brushless double-fed generator. The power generation system comprises a brushless double-fed generator, a first contactor, a circuit breaker, a frequency converter and a rectification and inversion unit, and also a second contactor, an auxiliary power supply, a third contactor, a frequency conversion controller and a rectification and inversion controller, wherein the second contactor is connected between the alternating current end of the rectification and inversion unit and a power winding, the third contactor is connected between the auxiliary power supply and the frequency converter, the frequency conversion controller is used for controlling the frequency converter, the first contactor and the third contactor and is connected with the frequency converter, the first contactor and the third contactor, and the rectification and inversion controller is used for controlling the rectification and inversion unit and the second contactor, is connected with the rectification and inversion unit and the second contactor respectively and is also connected with the frequency conversion controller through a communication interface to output an informing signal to the frequency conversion controller. The power generation system can realize automatic excitation and constant pressure and constant frequency control, is high in running efficiency, high in stability and high in reliability and is energy-saving.
Description
technical field [0001] The invention relates to the technical field of generator automatic control, in particular to a power generation system based on a brushless double-fed generator and an excitation method thereof. Background technique [0002] At present, the development of new energy is in a vigorous period, and the energy-saving transformation of existing equipment is also widely recognized by customers. In some remote areas and areas with tight electricity consumption, independent diesel generators or wind power are widely used to generate electricity to meet the electricity demand of small closed grids. As we all know, the brush double-fed motor has the advantages of simple motor control and mature manufacturing technology. Therefore, the AC excitation brush double-fed motor is widely used in the variable speed constant frequency power generation system. However, for the application of an independent power generation system, since the control of the power generatio...
Claims
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IPC IPC(8): H02P9/08H02J3/38
Inventor 宾宏刘常亮
Owner 三垦力达电气(江阴)有限公司