总结氧化锌避雷器消除相邻设备电磁干扰试验_电磁干扰消除试验
总结氧化锌避雷器消除相邻设备电磁干扰试验由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“电磁干扰消除试验”。
总结氧化锌避雷器消除相邻设备电磁干扰试验
一、氧化锌避雷器的工作原理
A, the working principle of zno arrester
氧化锌ZnO避雷器是20世纪70年代发展起来的一种新型避雷器，它主要由氧化锌压敏电阻构成。每一块压敏电阻从制成时就有它的一定开关电压（叫压敏电阻），在正常的工作电压下（即小于压敏电压）压敏电阻值很大，相当于绝缘状态，但在冲击电压作用下（大于压敏电压），压敏电阻呈低值被击穿，相当于短路状态。然而压敏电阻被击状态，是可以恢复的；当高于压敏电压的电压撤销后，它又恢复了高阻状态。因此，在电力线上如安装氧化锌避雷器后，当雷击时，雷电波的高电压使压敏电阻击穿，雷电流通过压敏电阻流入大地，使电源线上的电压控制在安全范围内，从而保护了电器设备的安全。
Zinc oxide ZnO arrester is developed in the 1970 s a new type of surge arrester, it is mainly made up of ZnO varistor.Each piece made when there is a varistor from it must switch voltage(called varistor), under http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com
the normal operating voltage(i.e., le than preure-sensitive voltage)preure sensitive resistance value is very big, is equivalent to the insulation state, but under the effect of impulse voltage(voltage)is greater than the preure sensitive, varistor is undervalued is punctured, equivalent to a short circuit condition.Varistor was hit state, however, can be restored;When the voltage is higher than the preure sensitive voltage cancellation after it back to the high impedance state.On power line, therefore, such as zinc oxide lightning arrester installation, when struck by lightning, thunder electric wave of the high voltage breakdown, the varistor lightning over voltage sensitive resistor circulation into the earth, and made the voltage on the power cord control within the scope of the security, to protect the safety of electrical equipment.二、氧化锌避雷器带电测试的理论依据
Second, zinc oxide lightning arrester charged the theoretical basis of the test http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com
1.氧化锌避雷器带电测试的重要性
1.The zinc oxide lightning arrester charged the importance of the test
氧化锌避雷器在运行中由于其阀片老化、受潮等原因，容易引起故障，这将导致主设备得不到保护，严重时可能发生爆炸，影响系统的安全运行。而氧化锌避雷器预试必须停运主设备，会影响设备的运行可靠性，而且膨润土防水毯有时受运行方式的限制无法停运主设备，导致避雷器不能按时预试。因此，氧化锌避雷器的带电测试与在线监测显得尤为重要。
Zinc oxide lightning arrester valves in operation because of its ageing, be affected with damp be affected with damp, easy to cause failure, this will lead to the main equipment is not protected, serious when can happen explosion, affect the safe running of the system.And zinc oxide lightning arrester pretesting must shut down the main equipment, will influence the operation reliability of the equipment, and sometimes restricted http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com
by operation mode can't shut down the main equipment, lead to lightning arrester from pilot test on time.Therefore, live test of zno arrester and online monitoring is particularly important.2.氧化锌避雷器带电测试的目的
2.The zinc oxide lightning arrester charged testing purposes
利用氧化锌避雷器的带电测量，测得避雷器阻性电流与总泄露电流的比值，即氧化锌避雷器的阻性电流分量，来判断避雷器的受潮及老化状况。因氧化锌避雷器在阀片老化以及经受热和冲击破坏以及内部受潮时，氧化锌避雷器的有功损耗加剧，也即避雷器泄露电流中的阻性电流分量会明显增大，从而在氧化锌避雷器内部产生热量，使得氧化锌避雷器阀片进一步老化，产生恶性循环，复合土工膜破坏氧化锌避雷器内部稳定性。通过氧化性避雷器带电测量有功分量，及时发现有问题的氧化锌避雷器，将设备故障杜绝在萌芽状态。
Measured using zinc oxide lightning arrester of charged, http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com
lightning arrester current impedance and the ratio of the total leakage current, the resistance of zinc oxide arrester current component, to judge the lightning arrester of be affected with damp be affected with damp and aging conditions.For zinc oxide lightning arrester in the failure of valve plates and subjected to heat and aging impact and internal be affected with damp be affected with damp, zinc oxide arrester active lo increase, which is lightning arrester impedance current component
of
leakage
current
will significantly increase, thus the zinc oxide lightning arrester internal heat, makes the zinc oxide lightning arrester valve further aging, produce vicious circle, destroy the zinc oxide lightning arrester internal stability.Through oxidizing lightning arrester charged measurement of active component, found problems in time of zinc oxide lightning arrester, to prevent equipment failure in the bud.3.影响氧化锌避雷器带电测试因素
3.The factors affecting zinc oxide lightning arrester http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com
electric test
影响氧化锌避雷器带电测试的因素很多，主要有间隔内相间干扰、测试方法、表面污秽等因素。而酱油表面污秽可以在现场通过对氧化锌避雷器的表面清洁处理得到解决，这里主要排除间隔内相间干扰、测试方法对测量带来的影响。
Many factors influencing the zinc oxide lightning arrester charged test interval and white main factors such as interference, test methods, surface filth.And surface contamination can be on site on the surface of the zinc oxide lightning arrester cleaning resolved, here basically eliminate interval and to measure the impact of interference, the test method.氧化锌避雷器因其优越的过电压保护特性而逐步取代了老式的阀式避雷器，在电力系统中得到广泛应用。但氧化锌避雷器阀片老化以及经受热和冲击破坏会引起故障，严重时可能会导致爆炸，避雷器击穿还会导致变电站母线短路，影响系统安全运行。因此，必须对运行中的氧化锌避雷器进行严格有效的检测和定期预防性试验，开展氧化锌避雷器在线监测。由于氧化锌避雷器预试（特别是主变三侧避雷器）必须 http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com
停运主设备，会影响酱油设备的运行可靠性，而且有时受运行方式的限制无法停运主设备，导致避雷器不能按时预试。因此，氧化锌避雷器的带电测试与在线监测显得尤为重要。
Zinc oxide lightning arrester for its superior overvoltage protection feature gradually replaced the old valve type lightning arrester, widely used in electric power system.But the zinc oxide lightning arrester aging valve plates and subjected to heat and impact damage can cause failure, serious when may lead to explosion, the lightning arrester breakdown can also lead to substation busbar short circuit, affect the safe operation of the system.Must, therefore, the operation of zinc oxide arrester strict and effective testing and periodic preventive test, zinc oxide lightning arrester online monitoring.Because of the zinc oxide lightning arrester pretesting(especially the main transformer with three lightning arrester)must shut down the main equipment, will influence the operation reliability of the equipment, and sometimes restricted by operation mode can't shut down the main equipment, lead to lightning arrester from pilot test http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com http://www.daodoc.com
on time.Therefore, live test of zno arrester and online monitoring is particularly important.
