On-site Measurement Method for the No-load and Load Loss of Transformer

The power transformer is the core equipment in the power grid, which reliability directly affects the safety of the power system. The no-load loss and load loss are important parameters of the transformers, because the transformer losses reflect not only the operating efficiency but also the status of equipment. Generally, these parameters are measured through off-line no-load and load tests. But it is difficult to be carried out in field. As for the large capacity transformers, the operating efficiency is high. Limited to the accuracy of the measuring instruments, the online measurement is infeasible. This paper presents a more effective on-site measurement method for transformer losses. The implementation is also discussed. It directly performs the no-load test by using power grid as the…