Main problems of controlling power quality in active–adaptive mains

Abstract

Problems of controlling power quality in active-adaptive mains and controlling power parameters are examined for mains with noise caused by voltage and current distortions. Ways to control voltage at transforming substations of 110–220/10–20 kV are relevant at present. Different approaches for different purposes regarding problems of controlling power are presented. Measuring and calculating procedures are examined to determine which is preferable. Examples in which these procedures can be used are presented. For this purpose, it is necessary to develop a scientific basis for creating a device for automating, controlling, and protecting smart electric circuits with algorithms for automated adaptation to topology and variation in mains parameters by simulating electric mains that operate with modern control technologies. It makes possible to investigate the active-adaptive impact to distributing mains parameters under different types of loading and its distance from the power source. The algorithm of OLTC control for transformers of 110–220/10–20 kV is presented. The idea of OLTC control is as follows: OLTC responses, considering its residual lifetime and switching distribution over time, should depend on load curve: during the hours within which the load curve is smooth, the OLTC “accumulates” a period of time in which the load is variable in time and the OLTC responds more often. As a result, the OLTC residual lifetime is used efficiently for the active adaptive system of voltage control.