Design and realization of calibration method of electronic transformer
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摘要: 对电子式互感器进行校验是确保其在电力系统中成功应用的前提.针对目前电子式互感器校验过程中存在的问题,提出了一种新的校验方法.利用有限次迭代和最小二乘法相结合的组合测量原理实现频率的快速准确测量;引入准同步算法并对其实现过程中几个关键环节的设计及参数选取问题进行讨论,有效抑制了因电网频率波动而导致的非同步采样对校验结果的影响;最后对校验方法的实现过程进行了仿真与实测,验证了方法的性能及效率.为便携式智能化校验装置的研制提供了强有力的理论支持.Abstract: It is necessary for electronic transformer to make calibration before putting it into practice. A new calibration method is presented in order to solve existent problems of actual calibration course. The frequency of power system is accurately measured according to the combined measurement principle of the limited iteration and the least squares method. The quasi-synchronous algorithm is introduced, some key parameters and steps are especially discussed, and thus the accuracy of the calibration method influenced by the frequency vibration will be significantly improved. The simulation results of new calibration method is achieved, and it is well coincide with the testing results. It shows that the performance and efficiency of new calibration method is satisfied. It will provide the powerful theory support for the development of portable intelligent calibration equipment.
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Key words:
- electronic transformer /
- calibration /
- frequency /
- quasi-synchronous
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