This excerpt taken from the MGEE 10-K filed Feb 26, 2007.
Item 15. Exhibits and Financial Statement Schedules.
Signatures - MGE Energy, Inc.
Signatures - Madison Gas and Electric Company
This excerpt taken from the MGEE 10-Q filed Nov 7, 2006.
Requirements to wind turbines in case of fault on the grid.
Expected behaviour of wind turbine in case of fault on the grid: In case of fault on the grid when voltage exceeds permitted values, the generator of a standard wind turbine will be disconnected and the wind turbine will stop. The wind turbine automatically restarts after the voltage on the grid has been within the limits for definite time (10 minutes). Wind turbines with Fault Ride Through option will not disconnect the generator during the fault (voltage deep), but will continue to operate for a certain time and under certain conditions. After the voltage is recovered, the wind turbine will re-establish normal operation and in that way support recovery of the electrical system after the fault.
If a wind turbine with fault ride through option is chosen, there can be some specific requirements for wind turbine behaviour during the fault period (e.g. reactive current injection). These requirements are dealt with in questions 17-18.
Any requirements regarding active power control of the wind turbine during fault on the grid and after fault period must be described here.
Requirements regarding reactive power control of the wind turbine during fault on the grid and during an after-fault period, if any, must be described here.
Expected voltage change during fault and after-fault period: It is necessary here to describe the characteristic shape of voltage disturbance during the fault that the wind turbine must withstand without disconnection. It can be described or shown as a drawing.
Maximum expected frequency changes during system disturbances. Amount and maximum ratio of frequency changes (Hz/sec): Maximum variation of frequency during system disturbances must be stated. Electrical code or other documentation related to the connection of the wind turbine: Relevant documents must be mentioned here.