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Flexible AC transmitting system based on flywheel energy storage

A flywheel energy storage and power transmission system technology, which is applied to electric components, electromechanical devices, electrical components, etc. to improve the transmission capacity of the line, realize the variable impedance control of the line, and achieve high-quality operation.

Inactive Publication Date: 2007-12-19
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The energy storage phase-modulating motor solves the problem of power balance, but it does not involve regulating the power flow of the transmission line to achieve the optimal distribution of the system power flow, suppressing the power oscillation caused by the line-to-ground short circuit, supporting the system node voltage, and ensuring that the transmission capacity of the transmission line is close to issues such as thermal stability limits

Method used

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  • Flexible AC transmitting system based on flywheel energy storage
  • Flexible AC transmitting system based on flywheel energy storage

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Embodiment Construction

[0019] A flexible AC power transmission system based on flywheel energy storage proposed by the present invention has a structure as shown in Figure 1, including a doubly-fed flywheel energy storage motor 1, an AC excitation power supply, a monitoring device 7, a series transformer 3 and an anti-parallel bidirectional thyristor 6.

[0020] The AC excitation power supply includes a parallel-side converter 2, a series-side converter 4, and a capacitor 5. Both the parallel-side converter 2 and the series-side converter 4 are three-phase voltage source type pulse width modulation converters (PWM), and the parallel-side converter The AC terminal of 2 is connected to the rotor winding of the doubly-fed flywheel energy storage motor 1, the two DC terminals of the parallel-side converter 2 and the two DC terminals of the series-side converter 4 are respectively connected to both ends of the capacitor 5, and the series-side converter 4 The AC end of the AC terminal is connected to the ...

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Abstract

This invention relates to a flexible AC transmission system based on flywheel energy-storage including a double-feed flywheel energy-stored motor, an AC excitation supply, a monitor, a serial transformer and an inverse parallel two-way thyristor, in which, the supply includes a parallel side converter, a serial side converter and a capacitor, the AC end of the parallel side converter is connected with the rotor winding of the flywheel energy-stored motor, the two DC ends of which and those of the serial side converter are connected with two ends of the capacitor, the AC end of the serial converter is connected with the first winding of the serial transformer, the second winding of which is parallel to the inverse parallel two-way thyristor and one end of which is connected with the stator winding of the motor and the monitor device realizes by-pass protection by controlling the connection state of the thyristor.

Description

technical field [0001] The invention belongs to flywheel energy storage technology and flexible AC power transmission technology, and specifically relates to a flexible AC power transmission system based on flywheel energy storage, including a double-fed flywheel energy storage motor, an AC excitation power supply and a monitoring device. Background technique [0002] In the current power system, since there are no devices with large capacity and fast access to electric energy, the production and consumption of electric energy must be basically kept in a state of electromechanical power balance at all times. Once the system is disturbed and causes dynamic power imbalance, it may pose a threat to the stability of the system, and serious electromechanical power imbalance will lead to system collapse. [0003] In order to solve this problem, the current common method is to use relay protection and safety and stability control devices to perform operations such as machine cut-of...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02P9/14H02K7/02H01F27/28H02J3/18
CPCY02E60/16Y02E40/30
Inventor 康勇邹旭东段善旭
Owner HUAZHONG UNIV OF SCI & TECH
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