Traditional transformer rectifier has big volume, low efficiency and intelligent level
The traditional thyristor rectifier has low efficiency and big volume. The modern power supply can achieve low cost, high efficiency and high reliability. The current cathodic protection system of pipeline adopts big specification such as 30V/10A. However, The cathodic protection current is usually very small( less than 10W in stations). Too much current will lead to abnormal operation of transformer rectifier. In the meantime, traditional transformer rectifier cannot meet the internet demands. Therefore the cathodic protection power supply should have big adjustable ranges, high precision, high efficiency, high reliability and long life to satisfy the market needs.