Title :
Graphical and Analytical Methods for Stalling Analysis of Engine Generator Sets
Author :
Renjit, Ajit A. ; Illindala, Mahesh S. ; Klapp, David A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
Reciprocating engine driven generator sets (or “gensets”) are a leading class of distributed energy resources (DERs) from the low kilowatt up to hundreds of kilowatt ratings. Natural-gas-based DERs are more likely to be favored by both industries and utilities in the near future because of their low cost due to the newly found shale deposits at many places in the world. The DERs such as gensets when operating under islanded conditions are susceptible to stalling and can bring down the entire industrial power system, particularly if they are loaded beyond 80% of the rated engine capacity. This paper presents graphical and analytical methods to determine the stalling conditions of the most common type of gensets that have a synchronous generator as the utility interface. A systematic approach is developed from the first principles of generator electromagnetic energy conversion. The engine fuel map limits have been integrated into the generator speed versus active power characteristics for this purpose. The stalling prevention by applying an underfrequency load relief (V/Hz) scheme is also discussed.
Keywords :
distributed power generation; engines; synchronous generators; distributed energy resources; engine driven generator sets; engine fuel map; generator electromagnetic energy conversion; industrial power system; stalling analysis; synchronous generator; systematic approach; underfrequency load relief scheme; utility interface; Engines; Fuels; Microgrids; Natural gas; Synchronous generators; Torque; Distributed energy resource (DER); Engine; Power systems; Synchronous generator; engine; excitation; governor; microgrid; power systems; synchronous generator;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2014.2305803