IN THE MATTER OF SOUTHWESTERN PUBLIC SERVICE COMPANY'S APPLICATION REQUESTING: (1) ISSUANCE OF A CERTIFICATE OF PUBLIC CONVENIENCE AND NECESSITY AUTHORIZING CONSTRUCTION AND OPERATION OF WIND GENERATION AND ASSOCIATED FACILITIES, AND RELATED RATEMAKING PRINCIPALS INCLUDING AN ALLOWANCE FOR FUNDS USED DURING CONSTRUCTION FOR THE WIND GENERATION AND ASSOCIATED FACILITIES; (2) APPROVAL OF THE LOCATION OF A WIND GENERATION FACILITY; AND (3) APPROVAL OF A PURCHASED POWER AGREEMENT TO OBTAIN WIND-GENERATED ENERGY