ERCOT has experienced more attention to and development of Private Use Networks (“PUN”) in the last months and years. This post summarizes what these “islands in the grid” are, their positive attributes, and how to create one.

If you find this post helpful, or would like to hear more about PUNs, we will be presenting more detailed information on this subject in a March 30th “Private Use Networks & Self-Generation: What You Need to Know” webinar, in which we will also address audience questions.

You can register for the free webinar using this link.

What’s a PUN?

Private Use Network is defined by ERCOT as “[a]n electric network connected to the ERCOT Transmission Grid that contains Load that is not directly metered by ERCOT (i.e., Load that is typically netted with internal generation).”  While a PUN is interconnected to the ERCOT system, it functions largely as an island within the ERCOT system that has both generation and load (separate from station load).  A PUN can contain many different categories of resources and loads, all of which are behind an ERCOT-polled settlement (“EPS”) meter. ERCOT models a PUN in its system models (used for transmission planning and for interconnection studies) if it contains at least 10MW generation, has more than one connection to the ERCOT grid, or provides ancillary services. For settlement purposes, ERCOT will settle the net of generation and load during any interval so that if the PUN is “net load” in an interval, it will be settled as load, and as generation if energy delivered to the system during interval exceeds energy consumed.
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