±500kV换流站直流电流互感器现场校准装置与技术

On-site Calibrating Device and Technology for DC Current Transformer in ± 500 kV Converter Station

随着中国超高压直流输电工程大量建成并投入商运,作为关系到直流输电系统稳定、安全、可靠运行的关键测量设备之一的直流电流互感器,目前主要依赖进口,并且还比较缺乏自主的产品性能检测手段和设备,因此,目前无论在换流站的投运前,还是在运行检修时,对其进行性能考察都比较困难,或成本很高,从而导致了难以准确掌控和把握该类型直流测量设备真实的运行状况。所提的直流互感器现场校准用设备与技术,通过在实际直流工程现场进行实际应用,证明了其有效性和实用性,并在实际应用中取得了良好的效果。

With the development of HVDC transmission projects which have been completed and put into commercial opera- tion, the application of direct current transformer which is one of key measuring equipment for the stable, safe and reliable op- eration of DC transmission system will be increasingly widespread. But it mainly depends on the import, and there lacks inde- pendent test method and equipment for product performance. Therefore, at present, whether before commissioning of converter station or during operation maintenance, it is difficult to do the performance investigation or the cost is high, which results in the fact that it is hard to accurately control and grasp the real operation conditions of this type of DC measurement equipment. The proposed field test equipment and technology for DC transformer have proved to be effective and practical by actual appli- cations in DC projects, and the good effect has been achieved in practical application.