Open AccessStrategy to stabilise power fluctuation of distributed renewable energy in combined heat and power micro‐grid
Author(s) -
Shi Jinxiao,
Huang Wentao,
Tai Nengling
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0759
Subject(s) - renewable energy , electricity , grid , power (physics) , heat pump , computer science , environmental science , mechanical engineering , engineering , electrical engineering , thermodynamics , physics , heat exchanger , geometry , mathematics
In order to stabilise the power fluctuation of renewable energy, a coordination control strategy is put forward in the combined heat and power micro‐grid. The micro‐grid contains heat pumps and hybrid energy storage system (HESS). The electricity‐heat conversion model is built by the analysis of operating characteristics of heat pumps. The proposed strategy uses a double‐layer modular structure. The power control layer uses fuzzy control to regulate the filter time constant. Operating states of heat pumps and HESS are taken into consideration. Heat pumps suppress the low‐frequency fluctuation power and HESS stabilises the high‐frequency components. The heat control layer corrects the heat pump output considering end‐users’ heat demands. Simulation proves the proposed strategy links electricity and heat, smooth the fluctuation and enhance the economy in the combined heat and power micro‐grid.