The North Dakota Public Service Commission on March 2 plans two public hearings, back to back, in the town of Dickinson on December 2015 applications from Brady Wind LLC related to a new wind farm project.
The commission said in a Jan. 20 public notice that Brady Wind filed an application for a Certificate of Site Compatibility concerning the location of the 150-MW Brady Wind Energy Center, consisting of up to 87 wind turbine generators and associated facilities in Stark County, North Dakota.
Brady Wind also filed applications for a certificate of corridor compatibility and a route permit concerning the location for approximately 19 miles of 230-kV electric transmission line and associated facilities in Stark County.
On Jan. 19, Brady Wind, which is a wholly owned, indirect subsidiary of NextEra Energy Resources LLC, filed a shadow flicker analysis report with the PSC. It noted that in addition to the 87 primary turbines, up to eight alternate turbines locations have also been considered. Alternate locations are proposed to provide siting flexibility based on on-going environmental studies and landowner preferences. Only 87 turbines will be constructed.
Consultant Tetra Tech conducted the shadow flicker analysis for the project to support Brady Wind’s application for a Certificate of Site Compatibility.
The report said that seven of the turbines (numbers 48, 49, 52, 53, 54, 55, and 56) will be the General Electric 1.79-100 turbine model and the rest of turbines will be the General Electric 1.715-103 turbine model. The two wind turbine models being considered for the project, and evaluated for potential shadow flicker impacts, have the following characteristics:
- GE 1.79 100 – 3-blade 100-meter diameter rotor, with a hub height of 80 meters and generating capacity of 1.79 MW. The GE 1.79-100 has a normal high rotor speed of 17.5 rotations per minute (rpm) which translates to a blade pass frequency of 0.87 hertz (Hz) (less than 1 alternation per second). The company plans to install up to seven GE 1.79-100 turbines.
- GE 1.715 103 – 3-blade 103-meter diameter rotor, with a hub height of 80 meters and generating capacity of 1.715 MW. The GE 1.715-103 has a normal high rotor speed of 17.5 rpm which translates to a blade pass frequency of 0.87 Hz (less than 1 alternation per second). The project plans to install up to eighty GE 1.715-100 turbines.