Pulse controlling and state monitoring device for H bridge cascade high voltage transformer power unit

Abstract

The invention discloses a novel device for impulse control and status monitoring of a power unit on an H-bridge concatenated high-pressure frequency changer. In the device that is designed for the H-bridge concatenated high-pressure frequency changer, pulses and command data in each phase of the high-pressure frequency changer are sent down to a first power unit Px1 (x denotes an A phase, a B phase and a C phase, same as below) of the phase by command fibers in a controller, and pulse data and command data are processed through analysis and phase-shifting by the Px1 and then are transmitted down sequentially; status data is sent to a previous power unit by status fibers from the last power unit (such as Px5) of the phase, is uploaded sequentially after being packed, and is uploaded to a fiber data transceiver module finally; and so the complete series connection of the fibers can be realized, and the number of fibers and the structure of a control circuit can be reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of high-voltage frequency converters, relates to industrial optical fiber communication technology, and in particular provides a pulse control and power unit state monitoring device for H-bridge cascaded high-voltage frequency converter power units. The device is aimed at H-bridge cascaded Designed with a high-voltage frequency converter, it can complete the pulse distribution of all power units, the control function and the status monitoring of each power unit through two optical fibers per phase. Background technique [0002] With the increasingly tense energy situation and the intensification of environmental deterioration, energy conservation and emission reduction have become the consensus of all countries in the world, and China, which is the largest energy-consuming country in developing countries, has become more serious about this problem. According to authoritative statistics, 70-80% of domestic el...

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Problems solved by technology

Both of the above two processing methods are applied, it is not difficult to see that figure 2 The method shown in although the communication fiber between each power unit and the main controller is figure 1 In the middle method, 4 are reduced to 2, but the pulse distribution function of the main controller is still very complicated, and there are still many optical fibers (30-60), not only the control circuit is complicated, but also the failure rate is high

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