Supply Demand-Based Optimization Algorithm for Estimating Break Down Voltage of Silicon Rubber Insulators

Silicon Rubber (SIR) is one of the most popular polymeric materials used in various insulation processes, such as the insulation of high voltage cables. But like other polymers, it has some disadvantages, so TiO2 was added as a filler to improve some SIR properties, such as electrical and performance properties, and increasing the dielectric strength. Six SIR samples were prepared with TIO2 filler at percentages (100: 0, 90:10, 80:20, 70:30, 60:40, and 50:50) %. Dielectric strength tests were performed. To obtain the most accurate and best results, the Supply demand- based optimization (SDO) algorithm was performed that is one of the modem methods similar to the mechanism of supply and demand in the economy. The obtained results of the proposed SDO technique is compared with the recent Movable damped wave algorithm (MDWA). The SDO technique was a fast and effective algorithm at finding the optimum values of the percentage of SIR/TiO2 fillers parameter under different conditions comparing with the MDWA algorithm. Eventually, the dielectric strength improved with increasing TiO2 content and the best filler sample according to this principle 60/40% SIR/ TiO2 filler sample as the dielectric increased by approximately 43.72% KV/mm.

I. Introduction

Insulators, especially cable insulators, are found in different locations and environments for their frequent use. Insulators are present in dry places such as the desert, wet places and the type of water varies, as the cables may be located in the lands next to the river, so the water is fresh or the cables are located in lands near the seas and here in Egypt there are two seas, they are the Red Sea and the Mediterranean, which differ completely in density, which affects the degree of salinity Water, and this in itself increases the degree of conductivity and also affects the tests conducted on the isolators. Therefore, tests must be conducted in all different environments, in order to be able to determine the efficiency of these insulators or not.