High-voltage inverter multi-machine parallel shore power supply device and control method thereof

Abstract

The invention relates to a high-voltage inverter multi-machine parallel shore power supply device and a control method thereof. The device is composed of a man-machine interface (touch screen), a signal modulation board, multiple high-voltage inverters and main control panels thereof, wherein the man-machine interface and the signal modulation board are connected through a serial communication line, the signal modulation board sets voltage and frequency according to the man-machine interface to generate modulated wave data, then the data is transmitted to each high-voltage inverter main control panel through a multichannel single-film optical fiber, the main control panels transmit the data to three-phase multi-level series power units of the corresponding high-voltage inverters through multiple groups of optical fiber communication, and the multiple high-voltage inverters finally output alternating-current high-voltage power with the same phase, frequency and amplitude. Through the control method, all the high-voltage inverters are independent without a subordinate relation and are not limited by communication distance, so that stability and reliability are high, and anti-interference capability is strong.

Description

technical field [0001] The invention relates to a high-voltage shore power supply, in particular to a high-voltage frequency converter multi-machine parallel device and a control method thereof. Background technique [0002] Optical fiber is used for long-distance high-quality transmission of network signals. In single-mode optical fiber, light propagates along a straight line without reflection, so its propagation distance is very long. The touch LCD screen is used as a man-machine interface display. The user interface of the man-machine interface can better reflect the status of equipment and processes, and bring customers a more intuitive experience through visual and touch effects. As a product, the human-machine interface is connected to industrial control equipment such as programmable logic controller (PLC), frequency converter, DC speed controller, instrument, etc., and uses the display screen to display and write the work through the input unit (such as touch screen...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a simple and reliable shore power supply device with multiple high-voltage frequency converters running in parallel. , heat dissipation technology and cost constraints

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