Publication
Development of a Wind Turbine Generator Volt-Var Curve Control for Voltage Regulation in Grid Connected Systems
Abstract
Growing interest in renewable energy sources has led to an increased installation rate of distributed energy resources (DERs) such as solar photovoltaics (PVs) and wind turbine generators (WTGs). The variable nature of DERs has created several challenges for utilities and system operators related to maintaining voltage and frequency. New grid standards are requiring DERs to provide voltage regulation across distribution networks. Volt-Var Curve (VVC) control is an autonomous grid-support function that provides voltage regulation based on the relationship between voltage and reactive power. This paper evaluates the performance of a WTG operating with VVC control. The evaluation of the model involves a MATLAB/Simulink simulation of a distribution system. For this simulation the model considers three WTGs and a variable load that creates a voltage event.
AI Summary
This paper investigates the use of Volt-Var Curve control in wind turbine generators to provide autonomous voltage support on a distribution feeder. A MATLAB/Simulink model with three wind turbines is subjected to a variable-load voltage event, and the uncontrolled baseline is compared with operation using reactive-power-based Volt-Var control. With the control enabled, the turbines regulate their points of common coupling and provide reactive power according to local voltage conditions while remaining within their apparent-power ratings. The controlled case keeps the minimum system voltage above the applicable ANSI limit during the disturbance, whereas the baseline case falls below it. The results show that distributed wind turbines can contribute directly to feeder voltage regulation rather than operating solely as active-power sources.
Full Paper
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