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Appl. Sci. 2018, 8(1), 8; https://doi.org/10.3390/app8010008

Rule Based Coordinated Control of Domestic Combined Micro-CHP and Energy Storage System for Optimal Daily Cost

1
Department of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China
2
China Electric Power Research Institute, Beijing 100192, China
3
Beijing Key Laboratory of Demand Side Multi-Energy Carriers Optimization and Interaction Technique, Beijing 100192, China
*
Author to whom correspondence should be addressed.
Received: 17 November 2017 / Revised: 16 December 2017 / Accepted: 19 December 2017 / Published: 22 December 2017
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Abstract

This paper presents a novel control algorithm for optimising operational costs of a combined domestic micro-CHP (combined heat and power), battery and heat storage system. Using a minute by minute basic time-step, this work proposes a simple and computationally efficient rule based whole-system management, developed from empirical study of realistic simulated domestic electricity and heat loads. The CHP availability is considered in two binary states which, together with leveraging storage effectively, maximises CHP efficiency, and gives the algorithm increased real world feasibility. In addition, a novel application of a dual battery system is proposed to support the micro-CHP with each battery supplying just one of the distinctive morning and evening electrical load peaks, and thus inherently improving overall battery system lifetime. A case study is presented where the algorithm is shown to yield approximately 23% energy cost savings above the base case, almost 3% higher savings than that of the closest previous work, and 96.8% of the theoretical minimum cost. In general, the algorithm is shown to always yield better than 88% of the theoretical minimum cost, a ratio that will be considerably higher when real-world CHP limitations are factored into the theoretical minimum calculation. View Full-Text
Keywords: multi-energy system; system optimisation; dual battery; binary CHP control; rule based control; domestic building multi-energy system; system optimisation; dual battery; binary CHP control; rule based control; domestic building
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Li, D.; Xu, X.; Yu, D.; Dong, M.; Liu, H. Rule Based Coordinated Control of Domestic Combined Micro-CHP and Energy Storage System for Optimal Daily Cost. Appl. Sci. 2018, 8, 8.

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