1.国网青海省电力公司电力科学研究院 青海 西宁 810008
2.西安交通大学 陕西 西安 710049
3.青海省高海拔电力研究重点实验室 青海 西宁 810008
4.青海省高海拔电力工程技术研究中心 青海 西宁 810008
任继云(1995),男,硕士,工程师,高电压技术,2389908592@qq.com。
收稿:2025-12-16,
修回:2026-01-15,
录用:2026-01-29,
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任继云, 韩旭涛, 马永福, 等. GIS加压加流现场试验方法研究及应用[J/OL]. 高压电器, 2026.
REN Jiyun, HAN Xutao, MA Yongfu, et al. Development and Field Application of a Combined Voltage-Current On-Site Test Technique for GIS[J/OL]. High VoltageApparatus, 2026.
GIS现场试验是保障设备投运后安全运行的最后一道防线。目前工程现场普遍采用交流耐压试验,但由于其试验条件与GIS实际运行工况下的“高电压-大电流”叠加应力存在显著差异,导致多起设备在通过交流耐压试验后仍在短期内发生击穿故障的问题。针对现有试验的不足,本文提出开展GIS加压加流现场试验,旨在提高投运前绝缘缺陷的检出率,提升设备投运后的运行可靠性。分析了在现场条件下同时向GIS施加高电压与大电流的技术路线,提出基于谐振电压-感应电流联合激励的新型现场试验方法,构建了完整的试验流程;进一步研制了适用于现场应用的感应式大电流试验装备,并首次在真实GIS交接试验现场完成加压加流试验验证。试验结果表明:采用感应法向GIS内部导杆施加大电流时,应避免GIS外壳、外壳接地及接地网之间形成导通回路;通过两套低功率叠加电源的协同使用,可在保证安全性的前提下有效实现GIS加压加流试验,为提升GIS交接试验的真实性与有效性提供了可行方案。
On-site testing of gas-insulated switchgear (GIS) is the final safeguard to ensure safe operation after commissioning. At present
AC withstand voltage tests are widely used in engineering practice; however
significant discrepancies exist between the test conditions and the actual “high-voltage–high-current” combined stresses experienced during GIS operation. As a result
multiple cases have been reported in which severe insulation breakdown occurred shortly after the equipment had successfully passed the AC withstand test. To address the limitations of existing test methods
this paper proposes a combined voltage–current on-site test for GIS
aiming to enhance the detection of insulation defects before commissioning and improve the operational reliability of GIS. A technical approach for applying high voltage and large current simultaneously under field conditions is analyzed
and a novel on-site test method based on resonant voltage and induced current combined excitation is proposed
together with a complete testing procedure. Furthermore
an induction-type high-current test device suitable for field application is developed
and the combined voltage–current test is conducted for the first time on an actual GIS during its handover testing. The results indicate that when applying a large induced current to the GIS internal conductor
conductive loops involving the GIS enclosure
enclosure grounding
and substation grounding grid must be avoided. By coordinating two low-power excitation sources
the proposed method can safely and effectively realize combined voltage–current on-site testing
offering a practical solution to improve the authenticity and effectiveness of GIS handover tests.
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