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The Texas rules allow for simple interconnection approval and relief from study fees for network interconnection under certain circumstances (continued).

“Certain aspects of secondary network systems create technical difficulties that may make interconnection more costly to implement.  If the proposed site is serviced by a networked secondary, no study fee may be charged to the applicant if:

   Proposed DG equipment is pre-certified

   Aggregate DG, including the proposed system, represents 25% or less of the total load on the network (based on the most recent peak load demand)

and either

   Proposed DG has inverter-based protective functions, or

   Proposed DG rating is less than the local applicant’s verifiable minimum load.

Otherwise, the TDU may charge the DG applicant a fee to offset the costs of the interconnection study.  The TDU must advise applicants requesting DG interconnection on secondary networks about the potential problems and costs before initiating the study.

Note that these provisions do not preclude the TDU from performing a study; they simply regulate when the TDU can charge the applicant for the cost of the study.  Whether or not a study fee is billable to the applicant, the TDU may reject an application for demonstrable reliability or safety issues but must work to resolve those issues to the mutual satisfaction of the TDU and applicant.  The TDU must make reasonable efforts to interconnect all proposed DG, including the possibility of switching network-secondary service to a radial feed if practical and if acceptable to the applicant.”

Source:  Distributed Generation Interconnection Manual, Public Utility Commission of Texas, May 1, 2002

Approaches from Other States and Jurisdictions     Texas

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