Jamaludin Farah Adilah, Ab-Kadir Mohd Zainal Abidin, Izadi Mahdi, Azis Norhafiz, Jasni Jasronita, Abd-Rahman Muhammad Syahmi
Centre for Electromagnetic and Lightning Protection Research (CELP), Faculty of Engineering, Universiti Putra Malaysia, UPM, Serdang, Selangor, Malaysia.
PLoS One. 2017 Nov 14;12(11):e0187892. doi: 10.1371/journal.pone.0187892. eCollection 2017.
Located near the equator, Malaysia is a country with one of the highest lightning densities in the world. Lightning contributes to 70% of the power outages in Malaysia and affects power equipment, automated network systems, causes data losses and monetary losses in the nation. Therefore, consideration of insulator evaluation under lightning impulses can be crucial to evaluate and attempt to overcome this issue. This paper presents a new approach to increase the electrical performance of polymer insulators using a Room Temperature Vulcanisation (RTV) coating. The evaluation involves three different settings of polymer insulator, namely uncoated, RTV type 1, and RTV type 2 upper surface coatings. All the insulators were tested under three different conditions as dry, clean wet and salty under different impulse polarities using the even-rising test method. The voltage breakdown for each test was recorded. From the experiment, it was found that the effectiveness of the RTV coating application became apparent when tested under salty or polluted conditions. It increased the voltage withstand capabilities of the polymer insulator up to 50% from the basic uncoated insulator. Under dry and clean conditions, the RTV coating provided just a slight increase of the breakdown voltage. The increase in voltage breakdown capability decreased the probability of surface discharge and dry band arcing that could cause degradation of the polymeric material housing. The RTV type 1 coating was found to be more effective when performing under a lightning impulse. The findings might help the utility companies improve the performance of their insulators in order to increase power system reliability.
马来西亚位于赤道附近，是世界上闪电密度最高的国家之一。闪电导致马来西亚70%的停电事故，并影响电力设备、自动化网络系统，造成该国的数据损失和金钱损失。因此，考虑雷电冲击下绝缘子的评估对于评估和试图解决这一问题至关重要。本文提出了一种使用室温硫化（RTV）涂层提高聚合物绝缘子电气性能的新方法。评估涉及三种不同设置的聚合物绝缘子，即未涂层、RTV 1型和RTV 2型上表面涂层。所有绝缘子均采用均匀升压试验方法，在干燥、清洁潮湿和含盐三种不同条件下，不同冲击极性下进行测试。记录每次测试的电压击穿情况。通过实验发现，在含盐或污染条件下进行测试时，RTV涂层的有效性变得明显。与基本未涂层的绝缘子相比，它将聚合物绝缘子的耐压能力提高了50%。在干燥和清洁条件下，RTV涂层仅使击穿电压略有增加。击穿电压能力的提高降低了可能导致聚合物材料外壳降解的表面放电和干带电弧的概率。发现RTV 1型涂层在雷电冲击下表现更有效。这些发现可能有助于公用事业公司提高其绝缘子的性能，以提高电力系统的可靠性。
