Detailed Modeling of Residential End-Use Motor Load and Protection for Distribution System Transient Study

An optimal coordination of residential motor protection has been considered a potential remedy for many sustained low voltage problems caused by faults in the transmission system. This paper presents the modeling of residential end-use motor loads equipped with dedicated protection devices in a dynamic-phasor-based simulation program. Common types of mechanical torque are implemented for different functional motors in typical single-family and multifamily homes. The point-on-wave study is performed to examine the responses of air-conditioner (A/C) compressor to the instant of voltage depression. Voltage depressions are imposed at the head of the feeder supplying multiple residential homes to investigate the behaviors of A/C compressor stalling, actions of motor tripping and reconnection, and system-level responses to motor stalling and motor protection.