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High-power series 12-pulse thyristor rectifier triggering device and method for ship

A trigger device, twelve-pulse technology, applied in the direction of output power conversion device, electrical components, etc.

Inactive Publication Date: 2013-07-03
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a marine high-power serial twelve-pulse thyristor rectifier trigger device that can solve the problem that the load change affects the output voltage of the rectifier circuit

Method used

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  • High-power series 12-pulse thyristor rectifier triggering device and method for ship

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Embodiment Construction

[0060] combine Figure 4 , the marine high-power serial type twelve-pulse thyristor rectifier trigger device of the present invention consists of:

[0061] The three-phase synchronous signal acquisition circuit 1 acquires the three-phase power supply on the grid side, and then converts the three-phase power supply into three 0-5V voltage signals through resistance voltage division and DC voltage bias. After passing through the resistance-capacitance low-pass filter, the three voltage signals are respectively sent to three voltage comparators U17A, U17B and U17C according to the set logic, and three square wave signals TA, TB and TC. The square wave signals TA, TB and TC are respectively sent to the CAP capture unit of TMS320L2808 via the optocoupler isolation circuit 2 composed of high-speed isolation operational amplifier HCPL-2630.

[0062] When the capture unit of TMS320F2808 captures the rising and falling edges of the three square wave signals of CAP1, CAP2 and CAP3, a ...

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Abstract

The invention provides a high-power series 12-pulse thyristor rectifier triggering device and method for a ship. A DSP (Digital Signal Processor) chip TMS320F2808 completes functions of acquiring three-phase power supply synchronizing signals, generating thyristor gate pole drive signals, realizing a fuzzy control algorithm, acquiring direct-current side voltage and current feedback signals, realizing RS485 communication based on an MODBUS protocol, acquiring alternating-current side voltage and current signals, acquiring fault signals of a transformer, a fuser, a circuit breaker and water-cooling equipment, and the like. According to the invention, the problem of thyristor triggering of a series 12-pulse thyristor rectifier is solved, parallel resistance in a rectifier circuit is reduced, conversion efficiency of the rectifier is increased and system reliability is improved. The invention is suitable for the triggering of a thyristor circuit in the series 12-pulse thyristor rectifier, and also suitable for the triggering of thyristor circuits in a series 24-pulse and a 36-pulse thyristor rectifiers and the triggering of thyristor circuits in a parallel 12-pulse thyristor rectifier, a parallel 24-pulse thyristor rectifier and a parallel 36-pulse thyristor rectifier.

Description

technical field [0001] The invention relates to a trigger device for thyristor rectification equipment, and also relates to a control method for thyristor rectification equipment. In particular, the invention relates to a trigger device and a control method for marine high-power serial twelve-pulse thyristor rectifier equipment. Background technique [0002] In order to reduce the impact on the power grid, high-power thyristor rectifiers used in industry usually choose multi-pulse operation. For the triggering of thyristors in equipment, there are usually analog trigger integrated circuits and digital trigger integrated circuits. Due to the dispersion of the parameters of discrete components, analog thyristor trigger circuits usually have the problem of unbalanced trigger pulses. For example, Wang Weibing, Sun Yongjie, and Liu Weidong described in the "Design and Implementation of SCR Trigger Circuits for Single-chip Microcomputers and FPGAs" written by Harbin University o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/06
Inventor 李军兰海罗耀华刘宏达
Owner HARBIN ENG UNIV
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