现场校准用磁调制式直流电流比较仪磁屏蔽结构仿真研究与设计

林国营; 潘峰; 易斌; 张鼎衢; 徐雁; 柏航

林国营,潘峰,易斌,张鼎衢,徐雁,柏航.现场校准用磁调制式直流电流比较仪磁屏蔽结构仿真研究与设计[J].电测与仪表,2017,54(1):.
LIN Guoying,PAN Feng,YI Bin,ZHANG Dingqu,XU Yan,BAI Hang.Simulation Study and Design of the Magnetic Shielding Structure of the DC Current Comparator Based on Magnetic Modulator for Field Calibration[J].Electrical Measurement & Instrumentation,2017,54(1):.

现场校准用磁调制式直流电流比较仪磁屏蔽结构仿真研究与设计

Simulation Study and Design of the Magnetic Shielding Structure of the DC Current Comparator Based on Magnetic Modulator for Field Calibration

DOI：

中文关键词: 直流电流互感器现场校准磁调制式直流电流比较仪磁屏蔽

英文关键词:Direct current transformer Field calibration DC current comparator based on magnetic modulator Magnetic shielding

基金项目:国家高技术研究发展计划（863计划）

作者中文名	作者英文名	单位
林国营	LIN Guoying	广东电网有限责任公司电力科学研究院
潘峰	PAN Feng	广东电网有限责任公司电力科学研究院
易斌	YI Bin	广东电网有限责任公司电力科学研究院
张鼎衢	ZHANG Dingqu	广东电网有限责任公司电力科学研究院
徐雁	XU Yan	华中科技大学电气与电子工程学院
柏航	BAI Hang	华中科技大学电气与电子工程学院

摘要点击次数: 2333

中文摘要:

直流电流互感器现场校准存在较强的电磁干扰和其他不确定的环境因素，因此现场校准用直流电流标准器不仅需要具有较高的测量准确度，还要具备较强的抗电磁干扰的能力。本文首先利用ANSYS软件对用于现场校准标准器的磁调制式直流电流比较仪磁屏蔽结构进行了建模仿真，分析了屏蔽层厚度、屏蔽材料的磁导率以及气隙对屏蔽效果的影响。根据仿真结果，完成了直流电流比较仪磁屏蔽结构的设计。其次，本文通过仿真分别分析了无磁屏蔽结构和有屏蔽结构条件下，母线偏心和邻近外导体所产生的干扰磁场对直流电流比较仪测量准确度的影响。最后，本文完成了额定参数为5000A：5A的直流电流比较仪样机的研制，并通过测试验证了仿真设计的有效性，所研制的直流电流比较仪整体准确度达到0.005级的应用要求。

英文摘要:

Strong electromagnetic interference and some uncertain environmental factors exit when the direct current (DC) transformer is calibrated on the work field. Therefore, the standard DC current comparator should not only have much high measuring accuracy, but also require the strong ability to resist electromagnetic interference. Firstly, the paper establishes the simulation model of the magnetic shielding structure of the direct current comparator (DCC) based on magnetic modulator with the ANSYS software, which is used as the reference for the field calibration. The influence of the thickness of the shielding, magnetic conductivity of the shielding material and gap on the magnetic shielding effectiveness are analyzed. According to the simulation results, the design of the magnetic shielding structure is carried out. Secondly, this paper analyzes the influence of the eccentric bus and interference magnetic field generated by the nearby conductor on the measuring accuracy of the DCC without and with the magnetic shielding structure respectively. In the end, the prototype of the DCC with the nominal parameter of 5000A:5A is developed. The testing results of the prototype confirm the simulation results and the effectiveness of the designed structure. The total accuracy of the developed DCC is up to 0.005 level, which is satisfied with the requirement of the applications.

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