Green Gas for a Grid as An Eco-Friendly Alternative Insulation Gas to SF6: From the Perspective of Partial Discharge Under AC
Green Gas for a Grid as An Eco-Friendly Alternative Insulation Gas to SF6: From the Perspective of Partial Discharge Under AC
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电网绿色气体作为 SF6 的环保替代绝缘气体：从交流局部放电的角度
作者：
Guoming Wang;Woo;G. Kil;Sung;Jae
本文研究了电网（g3）中绿色气体的局部放电特性，认为g3是一种很有前途的替代电力设施中使用的SF6气体的环保替代物，可以减少温室效应。使用具有4%NOVECTM 4710/96%CO2的g3气体，并且制造包括导体上突起（POC）和外壳上突起（POE）的电极系统以模拟气体绝缘结构中的PD。局部放电起始电压（PDIV），脉冲参数的时间和频率，和相分辨的局部放电（PRPD）模式在SF6和G3方面的PD特性进行了比较。根据结果，g3的PDIV在POC中是SF6的PDIV的76%-81%，在POE中是SF6的PDIV的78%-84%，这取决于气体压力。上升时间，脉冲宽度，和相对幅度在频域中的PD脉冲在G3气体大于SF6。此外，PRPD模式表明，无论是平均表观电荷和脉冲数的PD在g3高于SF6。本文的研究结果有望为气体绝缘电力设备的绿色制造提供基础资料。
This paper deals with the characteristics of partial discharge (PD) in green gas for a grid (g3), which is thought to be a promising eco-friendly alternative to substitute SF6 used in electrical power facilities and to reduce the greenhouse effect. g3 gas with 4% NOVECTM 4710/96% CO2 was used and electrode systems including a protrusion on conductor (POC) and a protrusion on enclosure (POE) were fabricated to simulate PD in a gas-insulated structure. PD characteristics in terms of partial discharge inception voltage (PDIV), pulse parameters in time and frequency, and the phase-resolved partial discharge (PRPD) pattern in SF6 and g3 were compared. From the results, the PDIVs of g3 were 76%–81% of that of SF6 in the POC and were 78%–84% of that of SF6 in the POE, depending on the gas pressure. Rising time, pulse width, and relative amplitude in the frequency domain of PD pulses in g3 gas were greater than those in SF6. In addition, the PRPD patterns indicated that both the average apparent charge and pulse count of PD in g3 were higher compared with those in SF6. The results from this paper are expected to provide fundamental material for the green manufacturing of gas-insulated power apparatus.