Power Supply Quality Improvement With An Extended Range Domestic Voltage Requlators

Abstract One of the effects of the rapid expansion of distribution networks in Nigeria is that the service voltage of many consumers lies outside the stipulated tolerance. This problem has been addressed by the use of commercial domestic voltage regulators that typically work between 150 and 250 V. Unfortunately the service voltage experienced by many consumers lie well outside this range. In order to establish the operating range of suitable regulators a preliminary study of the voltage supply in Ondo State Akure as a case study the distribution network was carried out. It revealed that up to 30 of consumers receive voltages of less than 80V whilst up to 50 receive less than 120V. In the light of this it was decided to design a suitable voltage regulator rated at 1.5KVA having an input voltage range between 50V and 250V with an expected nominal output voltage of 220V 6 .A theoretical framework was developed for the general class of switched electronic AC Voltage regulators using EXCEL. It provides a mechanism for computing the number and ratings of tapping needed to regulator transformers once the output voltage tolerance is specified.