Research of Additional Loss in 10kv Distribution Network Under Complex Power Quality Disturbances

Abstract

Energy saving and consumption reduction is one of the important means for power supply enterprises to improve their economic efficiency. However, with the widespread access of distributed generation and non-linear loads, the power quality problems make it difficult to neglect the additional losses in the distribution network. Firstly, the additional loss caused by three-phase unbalance is theoretically derived; secondly, according to the superposition principle, the formula for calculating the additional loss generated by distribution line and transformer when harmonics exist alone is derived; then the formula for calculating the additional loss of each part when the two are considered together is derived. Finally, the losses of the line and distribution transformer are simulated for each case by using the Matlab platform. The results show that the theoretical derivation is in good agreement with the simulation results.