The Improved Voltage Control Relay For The Single-phase Household Consumers Protection

This paper examines a novel approach for both the single-phase voltage control relays circuit design and work algorithms that are used for protection of the household consumers of electrical energy from unacceptable voltage deviations within power supply network. An overview, analysis and description of the circuit design elements, operation algorithms, methods of voltage measurements and the thresholds settings of the modified voltage control relays, based on microprocessors and microcontrollers have been carried out. The conducted overview and analysis systematizes information on the technical and functional features of the operational algorithms, circuits and components of the mentioned relays and demonstrates the prospects for development of voltage relay operational algorithms and protective characteristics according to existing International standards. The protective characteristics and standards of the power quality have been outlined and illustrated by the authors in detail. The voltage measuring and digital signal processing (signal filtering) algorithms in modified voltage relay are described as well.A generalization and conclusion are made concerning the improved operation algorithm in the voltage control relay for protection of single-phase household consumers. This paper might be useful for the specialists in this or similar subject area, for instance investigations of protective voltage relays for industrial applications.