Study on the opening mode of high-voltage circuit breaker for SLF to reduce the electromagnetic radiation

The sudden change of the state of the power system will generate a strong electromagnetic interference, which could make the surrounding electronic equipments ineffective or even damaged. To this end, many kinds of protective measures have being taken, but their effect are not very well. In this paper, a new method was put forward, i.e. using the intelligent operation of high-voltage circuit breaker reduces the electromagnetic interference generated with the opening of breaker. For the opening of short line fault (SLF), the criterion of successful opening of breaker has been derived according to the national standard. As a result, the best opening mode of SLF has been determined to achieve the purpose of the protecting electronic equipments.