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Distributed Generation Equipment and Energy SourcesDistributed Generation (DG) is the implementation of various power generating resources, near the site of need, either for reducing reliance on grid power or for feeding power directly into the grid. It may also be used to support or boost performance of weak transmission and distribution systems. DG is commonly defined by the following criteria:
The deregulation of the U.S. electrical grid has directly impacted the need for performance related testing to protect the integrity of the grid. Many utilities have requested UL's involvement in developing certification and performance testing requirements for grid interconnected devices. UL 1741 and IEEE 929 (soon to be harmonized) contain the basic safety and performance requirements specified by most utilities. UL will also assist with additional test requirements specified outside of these Standards as needed. Distributed Generation products include but are not necessarily limited to:
All of these products produce electrical power in one form or another (AC or DC). Although some of these products can be used directly to power loads, most of these products require intermediate electrical power conversion circuitry to take the generation device output power and turn it into a common usable form. The most commonly used device is the inverter or converter. Contact UsUL's expertise is not limited to the product types described below. UL has the capability to evaluate virtually any DG product. If you have any questions regarding the specific requirements, or need information regarding a particular area of DG, please contact the appropriate person in the table below:
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