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Energies 2017, 10(9), 1317; doi:10.3390/en10091317

Economic Valuation of Low-Load Operation with Auxiliary Firing of Coal-Fired Units

State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, No.1037, Luoyu Road, 430074 Wuhan, China
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Received: 6 August 2017 / Revised: 28 August 2017 / Accepted: 29 August 2017 / Published: 1 September 2017
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

It is often claimed that coal-fired units are highly inflexible to accommodate variable renewable energy. However, a recently published report illustrates that making existing coal-fired units more flexible is both technically and economically feasible. Auxiliary firing is an effective and promising measure for coal-fired units to reduce their minimum loads and thus augment their flexibility. To implement the economic valuation of low-load operation with auxiliary firing (LLOAF) of coal-fired units, we improve the traditional fuel cost model to express the operating costs of LLOAF and present the economic criterion and economic index to assess the economics of LLOAF for a single coal-fired unit. Moreover, we investigate the economic value of LLOAF in the power system operation via day-ahead unit commitment problem and analyze the impacts on the scheduling results from unit commitment policies and from extra auxiliary fuel costs. Numerical simulations show that with the reduction of the extra auxiliary fuel costs LLOAF of coal-fired units can remarkably decrease the total operating costs of the power system. Some further conclusions are finally drawn. View Full-Text
Keywords: low-load operation with auxiliary firing (LLOAF); fuel cost model considering LLOAF; economic criterion for LLOAF; unit commitment low-load operation with auxiliary firing (LLOAF); fuel cost model considering LLOAF; economic criterion for LLOAF; unit commitment
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, G.; You, D.; Lou, S.; Zhang, Z.; Dai, L. Economic Valuation of Low-Load Operation with Auxiliary Firing of Coal-Fired Units. Energies 2017, 10, 1317.

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