期刊
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
卷 133, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijepes.2021.107270
关键词
Droop control; Primary frequency control; Large-scale heat pump; Synthetic inertia control
资金
- Innovationsfonden [HEAT4RES]
- MOST China [2018YFE0106600]
This study explores how large-scale heat pumps can provide primary frequency support through local droop and synthetic inertia control methods, aiming to improve system frequency control performance. The complexity and operation of large-scale heat pumps differ from small-scale ones, making existing frequency support methods inaccurate. By using a state space model representation, the study evaluates the performance of existing local frequency control methods and shows improved grid frequency control performance after a disturbance.
Increasing penetration of volatile renewable sources in the electric power system increases the need of new sources of balancing capacity. As a power-to-x technology, heat pumps (HPs) couple the electricity and heating systems, while offering a potential source of regulating capacity. This paper presents new findings on primary frequency support from large-scale HPs through local droop and synthetic inertia control methods with the objective of improving the system frequency control performance following a disturbance. The complexity and operation of large-scale HPs are different from the common model representation of HPs as thermostatically controllable load, which makes the existing studies and HP frequency support methods inaccurate. This work applies a state space model representation of the large-scale HPs, which enables a performance evaluation of existing local frequency control methods. Simulation results show the improved grid frequency control performance following a disturbance supported by large-scale HPs. Simultaneously, the heat and power response of large-scale HPs with frequency control support is compared to that of small-scale HPs.
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