The design differential protection equipment of transformer based on DSP

The power transformers are very important in the power systems. Once it is out of order it results in tremendous influence. To ensure safety in production of systems and transformers, reduce lose in trouble, the relay protection of transformer requires harsh terms. In this paper, a computer transformer differential protection equipment is presented, including principle, protection arithmetic and engineering realization. It adopts DSP as core, Y/Delta alternation in software. Every side currents of balance on line, alarm in time. This equipment works in safety and in reliable. It is high speed, wide scope and high accuracy.