干式空心电力电抗器现场匝间过电压试验技术研究
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摘要
干式空心电力电抗器现场匝间过电压试验近几年逐渐开展,相关技术仍需要完善。对电抗器投切过电压产生和匝间过电压试验原理进行了分析,探讨了匝间过电压试验方法的有效性。提出了一种可控放电技术,解决了标准推荐电路中存在的问题。分析了现场试验遇到的问题,提出了改进措施。研究结果表明:匝间过电压试验波前时间远小于雷电冲击的波前时间,这一特征与电抗器承受的过电压特性相符合。匝间过电压试验振荡频率在固定不变的范围,具有高分辨率。对地杂散电容对现场试验影响较大,通过正确接线和缩短接地线长度可降低影响。上述研究结果为干式空心电力电抗器现场匝间过电压试验提供了技术支撑。
The turn-to-turn overvoltage field test of the dry-type air-core power reactor has been carried out in recent years, and the relevant technologies still need to be improved. In this paper, the principle of the switching overvoltage generation and the turn-to-turn overvoltage test method is analyzed. The validity of the test method of turn-to-turn overvoltage is discussed. A controlled discharge technique is proposed to solve the problems in the standard circuit. The problems encountered in the field test are analyzed, and the improvement measure is put forward. Research results show that, the front time of the turn-to-turn overvoltage is much less than that of the lightning impulse, which is consistent with the overvoltage characteristics of the reactor. The oscillation frequency of the turn-to-turn overvoltage test is in the fixed range, so the test method has a high resolution. The influence of stray capacitance to ground on the field test is relatively large, which can be reduced by the correct wiring and shortening the length of the ground wire. The above research results provide technical support for the turn-to-turn overvoltage field test of dry-type air-core power reactor.
The turn-to-turn overvoltage field test of the dry-type air-core power reactor has been carried out in recent years, and the relevant technologies still need to be improved. In this paper, the principle of the switching overvoltage generation and the turn-to-turn overvoltage test method is analyzed. The validity of the test method of turn-to-turn overvoltage is discussed. A controlled discharge technique is proposed to solve the problems in the standard circuit. The problems encountered in the field test are analyzed, and the improvement measure is put forward. Research results show that, the front time of the turn-to-turn overvoltage is much less than that of the lightning impulse, which is consistent with the overvoltage characteristics of the reactor. The oscillation frequency of the turn-to-turn overvoltage test is in the fixed range, so the test method has a high resolution. The influence of stray capacitance to ground on the field test is relatively large, which can be reduced by the correct wiring and shortening the length of the ground wire. The above research results provide technical support for the turn-to-turn overvoltage field test of dry-type air-core power reactor.
引文
[1] 姚远航,魏新劳,杨胜生,等.阶梯电压下干式空心电力电抗器匝间绝缘的局放特性[J].哈尔滨理工大学学报,2018,23(3):72-78.(Yao Y H,Wei X L,Yang S S,et al.Characteristics of PD for dry-type air-core power reactor in turn-to-turn insulation under step-voltage[J].Journal of Harbin University of Science and Technology,2018,23(3):72-78.(in Chinese))
[2] 骆小龙,张良,王永红,等.干式空心电力电抗器匝间绝缘试验方法有效性分析[J].哈尔滨理工大学学报,2014,19(1):74-78.(Luo X L,Zhang L,Wang Y H,et al.Analysis of the effectiveness of turn-to-turn insulation test methods of dry-type air-core power reactor[J].Journal of Harbin University of Science and Technology,2014,19(1):74-78.(in Chinese))
[3] 赖俊驹,聂洪岩,欧树华,等.测量电容对干式空心电力电抗器开断过电压的影响[J].变压器,2018,55(5):26-32.(Lai J J,Nie H Y,Ou S H,et al.The influence of measuring capacitance on breaking over-voltage of dry-type air-core power reactor[J].Transformer,2018,55(5):26-32.(in Chinese))
[4] 张良,吕家胜,王永红,等.35 kV干式空心电力电抗器匝间绝缘现场试验[J].电机与控制学报,2014,18(6):66-71.(Zhang L,Lv J S,Wang Y H,et al.Field test on the turn-to-turn insulation for 35 kV dry-type air-core power reactors[J].Electric Machines and Control,2014,18(6):66-71.(in Chinese))
[5] 高自伟,朱学成,瞿舜克,等.66 kV干式空心电力电抗器故障分析[J].吉林电力,2013,41(4):38-39,42.(Gao Z W,Zhu X C,Qu S K,et al.Analysis on 66 kV dry-type air core reactor failure[J].Jilin Electric Power,2013,41(4):38-39,42.(in Chinese))
[6] Nie H Y,Liu X S,Wang Y H,et al.Breaking overvoltage of dry-type air-core shunt reactors and its cumulative effect on the interturn insulation[J].IEEE Access,2019,7:55707-55720.
[7] IEC60076-6-2007,Power Transformers-Part6:Reactors[S].
[8] GB1094.6-2011,电力变压器-第6部分:电抗器[S].(GB1094.6-2011,Power Transformers-Part6:Reactors[S].(in Chinese))
[9] JB/T5346-1998,串联电抗器[S].(JB/T5346-1998,Serial Reactor[S].(in Chinese))
[10] 国家电网公司企业标准-2005,10～66 kV干式电抗器技术标准[S].(Company Standard of State Grid Corporation of China-2005,Technical Standard for 10～66 kV Dry-type Reactors[S].(in Chinese))
[11] JB/T10775-2007,6～35 kV级干式并联电抗器技术参数和要求[S].(JB/T10775-2007,Technical parameters and requirements for 6～35kV Air-Core Shunt Reactors[S].(in Chinese))
[12] IEEE Std C57.16-1996,IEEE Standard Requirements,Terminology,and Test code for Dry-type Air-core Series-connected Reactors[S].
[13] IEEE Std C57.21-2008,IEEE Standard Requirements,Terminology,and Test code for Shunt Reactors Rated Over 500 kVA[S].
[14] Gao Z W,Zhu X C,Song X P,et al.Characteristics of PD for reactor inter-turn insulation under pulse oscillating voltage[C]//IEEE International Conference on the Properties and Applications of Dielectric Materials,Sydney,Australia,2015:728-731.
[15] Huang R,Lv J T,Gao Z L,et al.Spatial magnetic field distribution of different inter-turn short-circuit fault location for dry air-core power reactors[C]//IEEE Conference on Industrial Electronics and Applications,Wuhan,China,2018:2210-2214.
[16] 关永刚,唐琦雯,刘卫东,等.40.5 kV真空断路器开断并联电抗器时过电压的产生机制[J].中国电机工程学报,2012,32(33):124-133.(Guan Y G,Tang Q W,Liu W D,et al.Overvoltage mechanism of switching off shunt reactors for 40.5 kV vacuum circuit breakers[J].Proceedings of the CSEE,2012,32(33):124-133.(in Chinese))
[2] 骆小龙,张良,王永红,等.干式空心电力电抗器匝间绝缘试验方法有效性分析[J].哈尔滨理工大学学报,2014,19(1):74-78.(Luo X L,Zhang L,Wang Y H,et al.Analysis of the effectiveness of turn-to-turn insulation test methods of dry-type air-core power reactor[J].Journal of Harbin University of Science and Technology,2014,19(1):74-78.(in Chinese))
[3] 赖俊驹,聂洪岩,欧树华,等.测量电容对干式空心电力电抗器开断过电压的影响[J].变压器,2018,55(5):26-32.(Lai J J,Nie H Y,Ou S H,et al.The influence of measuring capacitance on breaking over-voltage of dry-type air-core power reactor[J].Transformer,2018,55(5):26-32.(in Chinese))
[4] 张良,吕家胜,王永红,等.35 kV干式空心电力电抗器匝间绝缘现场试验[J].电机与控制学报,2014,18(6):66-71.(Zhang L,Lv J S,Wang Y H,et al.Field test on the turn-to-turn insulation for 35 kV dry-type air-core power reactors[J].Electric Machines and Control,2014,18(6):66-71.(in Chinese))
[5] 高自伟,朱学成,瞿舜克,等.66 kV干式空心电力电抗器故障分析[J].吉林电力,2013,41(4):38-39,42.(Gao Z W,Zhu X C,Qu S K,et al.Analysis on 66 kV dry-type air core reactor failure[J].Jilin Electric Power,2013,41(4):38-39,42.(in Chinese))
[6] Nie H Y,Liu X S,Wang Y H,et al.Breaking overvoltage of dry-type air-core shunt reactors and its cumulative effect on the interturn insulation[J].IEEE Access,2019,7:55707-55720.
[7] IEC60076-6-2007,Power Transformers-Part6:Reactors[S].
[8] GB1094.6-2011,电力变压器-第6部分:电抗器[S].(GB1094.6-2011,Power Transformers-Part6:Reactors[S].(in Chinese))
[9] JB/T5346-1998,串联电抗器[S].(JB/T5346-1998,Serial Reactor[S].(in Chinese))
[10] 国家电网公司企业标准-2005,10～66 kV干式电抗器技术标准[S].(Company Standard of State Grid Corporation of China-2005,Technical Standard for 10～66 kV Dry-type Reactors[S].(in Chinese))
[11] JB/T10775-2007,6～35 kV级干式并联电抗器技术参数和要求[S].(JB/T10775-2007,Technical parameters and requirements for 6～35kV Air-Core Shunt Reactors[S].(in Chinese))
[12] IEEE Std C57.16-1996,IEEE Standard Requirements,Terminology,and Test code for Dry-type Air-core Series-connected Reactors[S].
[13] IEEE Std C57.21-2008,IEEE Standard Requirements,Terminology,and Test code for Shunt Reactors Rated Over 500 kVA[S].
[14] Gao Z W,Zhu X C,Song X P,et al.Characteristics of PD for reactor inter-turn insulation under pulse oscillating voltage[C]//IEEE International Conference on the Properties and Applications of Dielectric Materials,Sydney,Australia,2015:728-731.
[15] Huang R,Lv J T,Gao Z L,et al.Spatial magnetic field distribution of different inter-turn short-circuit fault location for dry air-core power reactors[C]//IEEE Conference on Industrial Electronics and Applications,Wuhan,China,2018:2210-2214.
[16] 关永刚,唐琦雯,刘卫东,等.40.5 kV真空断路器开断并联电抗器时过电压的产生机制[J].中国电机工程学报,2012,32(33):124-133.(Guan Y G,Tang Q W,Liu W D,et al.Overvoltage mechanism of switching off shunt reactors for 40.5 kV vacuum circuit breakers[J].Proceedings of the CSEE,2012,32(33):124-133.(in Chinese))