Alaska Environmental Power (AEP) contracted with Electric Power Systems Inc. (EPS) to perform a grid impact study for the proposed new Delta Junction Wind Plant, interconnected to the Golden Valley Electric Association (GVEA) system near Delta Junction. The Delta Junction wind plant consists of 16 wind turbines rated at 1.6 MW each, step-up transformers, and a collector system connecting to the GVEA system at the Jarvis Creek substation. The study will analyze the operational impacts of the variable wind energy. Power regulation requirements will be recommended based on analysis of 10-minute wind rate ramp analysis. Additionally, the grid impact study will analyze the power flow and transient stability impacts of the Delta Junction wind plant on GVEA’s grid. The protection impacts to the GVEA system as well as the protection requirements for the AEP wind farm are also identified. The proposed 24 MW Eva Creek wind plant will be included in some of the impact studies, evaluated in conjunction with the Delta Junction wind plant for excess energy issues and the impact on power flows and transient stability in a limited number of cases. Both wind projects are assumed to consist of GE wind turbines. The Delta Junction Wind farm is modeled with the “WindInertia” package installed to provide an inertial response from the wind turbines during under-frequency grid events.
DeltaJunction Wind.pdf (12 MB)