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电场传感器在电力领域有着重要的应用。在特直流高压输电环境下,由输电线路电晕放电引起的具有空间电荷和空间离子流的复杂电场环境会对传感器的信号输出产生影响。为了研究空间电荷和空间离子流干扰对电场传感器输出特性的影响,实现传感器在离子流场环境下的准确测量,需要设计均匀直流离子流场发生装置。文献[1]基于场磨式电场传感器提出了一种在实验室产生直流离子流场环境的测试装置。IEEE标准机构在1990年将这一装置列入其有关直流离子流电场测量的标准[2],文献[3]也据此进行过直流离子流场的研究。为保证离子流场均匀性,传统的直流离子流场发生装置具有较大的平行板面积和较高输出的直流高压电源。整个装置体积庞大,很难加载环境载荷进行传感器环境影响因素研究,限制了新型电场传感器的研究发展,并且不适于移动到户外现场进行测试校准应用。因此本文设计了一种缩小尺寸直流离子流场发生装置。
Optimal Design of Direct Current Ionized Field Generator
doi: 10.3969/j.issn.1001-0548.2017.06.013
- Received Date: 2016-09-26
- Rev Recd Date: 2017-02-17
- Publish Date: 2017-12-15
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Key words:
- direct current ionized field /
- fringing field effect /
- the finite element analysis /
- uniformity
Abstract: Direct current (DC) ionized field generator plays an important role in the test and calibration of electric field sensors under the condition of ionized field. Traditional DC ionized field generator is difficult to meet the development needs of novel electric field sensors and inconvenient to apply in outdoor fields for its large volume. This paper presents a reduced-scale DC ionized field generator. Based on theoretical calculations and finite element simulation, the critical parameters of device size and structure are analyzed and optimized. The structure is optimized and the fringing field effect is eliminated by equaling potential at the edge of the parallel plate. So the uniform electric field region between the parallel plates is increased and the uniformity error of electric field is reduced. The experimental results show that the relative average deviation of the ion current intensity at different places of the ionized field is only 1.66% when the voltage of corona wires is 7 kV. The reduced-scale DC ionized field generator presented in this paper can generate the uniform ionized field.
Citation: | LI Bing, ZHENG Feng-jie, PENG Chun-rong, CHEN Bo, LING Bi-yun, XIA Shan-hong. Optimal Design of Direct Current Ionized Field Generator[J]. Journal of University of Electronic Science and Technology of China, 2017, 46(6): 866-870. doi: 10.3969/j.issn.1001-0548.2017.06.013 |