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Cascade alternating-current excitation device for variable-speed pumped storage power generation system

A technology of AC excitation and power generation system, which is applied in the direction of controlling generators, control systems, and generators through magnetic field changes, and can solve the problems of limited expansion of voltage levels and high cost.

Inactive Publication Date: 2015-12-16
中国东方电气集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is typical to use high-voltage full-control switching devices such as IGCT and IEGT. Although the amount of devices can be reduced, the cost is expensive, and the devices are restricted by a few foreign companies, and the expansion of voltage levels is also limited.

Method used

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  • Cascade alternating-current excitation device for variable-speed pumped storage power generation system
  • Cascade alternating-current excitation device for variable-speed pumped storage power generation system
  • Cascade alternating-current excitation device for variable-speed pumped storage power generation system

Examples

Experimental program
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Effect test

Embodiment 1

[0052] A cascaded AC excitation device for a variable-speed pumped storage power generation system includes a rotor-side grid-connected switch module 1, a multi-winding transformer module 2, and a three-phase cascaded back-to-back H-bridge module 3; the rotor-side grid-connected The switch module 1 is connected to a multi-winding transformer module 2 , and the multi-winding transformer module 2 is connected to a three-phase cascaded back-to-back H-bridge module 3 .

Embodiment 2

[0054] A cascaded AC excitation device for a variable-speed pumped storage power generation system includes a rotor-side grid-connected switch module 1, a multi-winding transformer module 2, and a three-phase cascaded back-to-back H-bridge module 3; the rotor-side grid-connected The switch module 1 is connected to a multi-winding transformer module 2 , and the multi-winding transformer module 2 is connected to a three-phase cascaded back-to-back H-bridge module 3 . The rotor-side grid-connected switch module 1 includes a set of three-phase input-side terminals 11 and a set of three-phase output-side terminals 12 . The multi-winding transformer module 2 includes a primary winding 21 and n a secondary winding 22 belonging to phase A 31, n A secondary winding 22 belonging to phase B 32 and n A secondary winding 22 belonging to phase C 33, wherein n is a natural number, all secondary windings 22 are single-phase windings, electrically isolated from each other, and have the same...

Embodiment 3

[0056] A cascaded AC excitation device for a variable-speed pumped storage power generation system includes a rotor-side grid-connected switch module 1, a multi-winding transformer module 2, and a three-phase cascaded back-to-back H-bridge module 3; the rotor-side grid-connected The switch module 1 is connected to a multi-winding transformer module 2 , and the multi-winding transformer module 2 is connected to a three-phase cascaded back-to-back H-bridge module 3 . The rotor-side grid-connected switch module 1 includes a set of three-phase input-side terminals 11 and a set of three-phase output-side terminals 12 . The multi-winding transformer module 2 includes a primary winding 21 and n a secondary winding 22 belonging to phase A 31, n A secondary winding 22 belonging to phase B 32 and n A secondary winding 22 belonging to phase C 33, wherein n is a natural number, all secondary windings 22 are single-phase windings, electrically isolated from each other, and have the same...

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PUM

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Abstract

The invention relates to the field of pumped storage power generation, in particular to a cascade alternating-current excitation device for a variable-speed pumped storage power generation system. The cascade alternating-current excitation device comprises a rotor-side grid-connected switch module, a multi-winding transformer module and a three-phase cascade back-to-back H bridge module, wherein the rotor-side grid-connected switch module is connected with the multi-winding transformer module; and the multi-winding transformer module is connected with the three-phase cascade back-to-back H bridge module. The cascade alternating-current excitation device has the advantages that the cascade alternating-current excitation device has variable-frequency operation capacity, can meet the excitation requirements of operation and variable-speed operation of a pumped storage generator set, has bidirectional energy flowing capacity, and can simultaneously meet the excitation requirements of operation of the pumped storage generator set in a power generation working condition and an electric working condition.

Description

technical field [0001] The invention relates to the field of pumped storage power generation, in particular to a cascaded AC excitation device for a variable-speed pumped storage power generation system. Background technique [0002] The pumped storage power station has the characteristics of fast start-up and flexible operation, and can undertake tasks such as valley filling, peak regulation, frequency regulation, phase regulation and emergency backup in the system. The traditional motor-generator set adopts the traditional synchronous generator with DC excitation, which is difficult to adjust the speed and has poor operating characteristics. In addition, it is difficult to start when this type of unit is running in the electric state. The use of AC excitation generators powered by AC excitation devices to replace traditional motor-generator sets can effectively solve the problems of speed regulation or variable speed operation of hydro-generators in traditional pumped stor...

Claims

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Application Information

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IPC IPC(8): H02P9/30H02J3/28H02P101/10
Inventor 周宏林吴建东代同振吴小田况明伟
Owner 中国东方电气集团有限公司
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