A control system for a hydroelectric plant bridge crane

The control system combining PLC and frequency converter has solved the problems of high energy consumption, large mechanical impact and low speed regulation accuracy of traditional bridge cranes, and has achieved high reliability and high precision control, thus promoting the development of bridge cranes in hydropower stations towards high efficiency, safety and green development.

CN122403294APending Publication Date: 2026-07-17THREE GORGES JINSHAJIANG CHUANYUN HYDROPOWER DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THREE GORGES JINSHAJIANG CHUANYUN HYDROPOWER DEV CO LTD
Filing Date
2026-05-29
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional bridge crane control systems suffer from high energy consumption, large mechanical impact, low speed regulation accuracy, and complex maintenance. In particular, the equipment is easily damaged in high-temperature and dusty environments, affecting safety and positioning accuracy.

Method used

The control system, which combines PLC and frequency converter, achieves high reliability and high precision control through contactless control, stepless speed regulation and intelligent integration, combined with redundant design, energy feedback and vector control technology.

Benefits of technology

It improves system reliability and control precision, reduces energy consumption, reduces mechanical shock, extends equipment life, and reduces maintenance workload through intelligent monitoring.

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Abstract

本申请公开了一种水电站桥式起重机控制系统,所述水电站桥式起重机控制系统采用PLC+变频器+传感器架构,所述水电站桥式起重机控制系统包括:PLC单元、变频器和传感单元;所述PLC单元作为控制核心,经变频器完成水电站桥式起重机内大车、小车与起升机构的动作控制,并经传感单元实现相应动作机构的自动定位、超载保护及故障诊断;且所述变频器通过调节相应动作机构的电机频率实现0‑100%无级调速。本申请水电站桥式起重机控制系统通过无触点控制、无级调速与智能化集成解决传统系统的痛点。
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