Development of closed loop voltage control simulator for medium voltage distribution

Queensland Distribution Network Service Providers (DNSPs) are required by law to maintain steady state voltages at customer premises within specified limits of currently 240V ± 6%. The utilisation of Automatic Voltage Regulators (AVRs) and distribution transformer Tap Plans have allowed DNSPs to mostly maintain voltages along network feeders within regulatory limits. Two main AVR methods employed for AVRs are a Setpoint bus voltage and Line Drop Compensation (LDC). With a growing influx of the embedded generation, historic voltage management may not be appropriate. This paper presents about the development of a simulator for Closed Loop Voltage Control (CLVC) that utilises real-time data feedback from zone substations and ends of feeders to effectively manage and reduce customer over- and undervoltage issues.