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Voltage source for high-voltage direct current transmission converter valve running test

A high-voltage direct current transmission and operation test technology, applied in the direction of converting DC power input to DC power output, AC power input converting to AC power output, and irreversible AC power input converting to DC power output, etc.

Inactive Publication Date: 2011-06-15
XUJI GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]The purpose of the present invention is to provide a voltage source for the operation test of the high-voltage direct current converter valve to solve the problems of the existing voltage source such as slow response speed and limited adjustment range

Method used

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  • Voltage source for high-voltage direct current transmission converter valve running test
  • Voltage source for high-voltage direct current transmission converter valve running test
  • Voltage source for high-voltage direct current transmission converter valve running test

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Embodiment Construction

[0015] like figure 1 Shown is the structural schematic diagram of the voltage source used for the operation test of the high-voltage DC converter valve of the present invention. As can be seen from the figure, the voltage source includes a three-phase controllable PWM power supply, a transformer, a high-voltage rectifier silicon stack and an auxiliary main circuit: the primary side of the transformer and A three-phase controllable PWM power supply is set between the distribution networks, a high-voltage rectifier silicon stack is set between the secondary side of the transformer and the auxiliary main circuit, and the output end of the auxiliary main circuit is connected to the test valve Vt and the feedback circuit.

[0016] The feedback circuit is composed of two sets of measuring partial pressure sensors. The input ends of the two sets of measuring partial pressure sensors are respectively connected to the measuring output ends of the charging capacitor set on the test valv...

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Abstract

The invention relates to a voltage source for a high-voltage direct current transmission converter valve running test. The voltage source comprises a transformer and an auxiliary main circuit, wherein a three-phase controllable pulse-width modulation (PWM) power supply is arranged on a primary side of the transformer; and a high-voltage silicon rectifier stack is arranged between a secondary side of the transformer and the auxiliary main circuit. A low-voltage side of the voltage source for the high-voltage direct current transmission converter valve running test is provided with a PWM power supply, the test voltage range is wide, and particularly low-voltage test characteristics are good; the total loss of the voltage source is low, the requirement on power supply capacity is low, and the power supply system only needs to supplement test loop loss and has low requirement on the system capacity; a high-voltage side of a loaded regulating transformer is rectified by the high-voltage silicon stack, the control is simple, the equipment cost is low, the current is low, and an extra cooling mode is not needed to be considered; moreover, the equipment cost and operating cost of the whole system are greatly reduced.

Description

technical field [0001] The invention belongs to the field of operation test of a high-voltage direct current transmission converter valve, and in particular relates to a voltage source for the operation test of a high-voltage direct current transmission converter valve. Background technique [0002] With the development of high-voltage DC transmission projects in power systems, converter valves connected in series with high-power thyristor devices have become the core of converter stations in DC transmission projects. Its cost generally accounts for about 25% of the total project investment, and its quality directly affects the reliability of the power transmission and transformation system. [0003] The operation test of the converter valve is to effectively verify the operating characteristics of the converter valve, to ensure that the converter valve can meet the operating requirements of the DC transmission system, and ensure the safe and reliable operation of the system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/12H02M3/135H02M5/458
Inventor 姚为正常忠廷张建李娟董朝阳刘刚肖晋景兆杰
Owner XUJI GRP
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