High failure rates of equipment resulting in severe operational problems are usually caused by switch restriking overvoltage on their 35kV distribution system. In order to solve these existed and potential problems

we come up with a set of protection methods by adding MOAs based on some national standards and criterions. Digital simulations by EMTP-ATP program were also performed to validate the efficiency and availability on practical uses. Results of digital simulations confirmed the mentioned improving protection methods which could really reduce the restriking over voltage well.