摘要:
针对现有矿用变频器测试系统存在测试项目不全面、测试效率低、安全性差、转矩加载精度不高等问题，采用交流回馈加载技术，设计了一种由供电系统、加载试验台、测控系统组成的矿用变频器性能测试系统。供电系统为测控系统和加载试验台提供控制和动力电源；加载试验台采用共母线的变频加载方式，为被试变频器提供负载环境；测控系统实时监测系统的运行状态，通过测控主机对供电系统和加载试验台进行状态监测与集中控制。基于WinCC组态软件开发了包括监测监控模块、测试管理模块和安全管理模块的测试系统软件。监测监控模块用于实现项目信息管理，数据采集、处理、存储，并通过测控主机对设备进行控制；测试管理模块主要用于对测试项目、测试流程、测试方法等进行管理，可对变频器的漏电闭锁、瞬时断电保护、输出端短路保护、过载保护、断相保护、过欠压保护、轻载、牵引特性、温升等性能进行测试；安全管理模块从操作安全保护、设备安全保护、系统运行安全等方面保证了测试过程安全可控。提出了恒转矩加载控制算法，提高了转矩加载精度。测试结果表明，该系统测试精度高，在额定转矩范围内，转矩加载误差均小于1%；采用交流回馈加载方式，系统耗电率不超过30%；系统电磁兼容性能符合标准要求。
Abstract:
In order to solve the problems of incomplete test items, low test efficiency, poor safety and low torque load accuracy of the existing mine inverter test system, a mine inverter performance test system consisting of power supply system, load test bench and measurement and control system is designed by using AC feedback load technology. The power supply system provides control and power supply for the measurement and control system and the load test bench. The load test bench adopts the frequency conversion load mode of common bus to provide load environment for the tested inverter. The measurement and control system monitors the operation status of the system in real time, and controls the power supply system and the load test bench through the measurement and control host. Based on WinCC configuration software, the test system software including monitoring and control module, test management module and safety management module is developed. The monitoring and control module is used to realize project information management, data acquisition, processing, storage, and control the equipment through the measurement and control host. The test management module is mainly used to manage test items, test procedures, test methods, etc. It can test the performance of the inverter such as leakage blocking, instantaneous power failure protection, output short circuit protection, overload protection, open phase protection, over voltage and under voltage protection, light load, traction characteristics, temperature rise, etc. The safety management module ensures the safety and control of the test process in terms of operation safety protection, equipment safety protection and system operation safety. The constant torque load control algorithm is proposed to improve the torque load accuracy. The test results show that the system has high test accuracy, and the torque load error is less than 1% within the rated torque range. The AC feedback load method is adopted, and the system power consumption rate does not exceed 30%. The electromagnetic compatibility of the system meets the standard requirements.
百度学术
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