Optimal Scheduling Strategy for Domestic Electric Water Heaters Based on the Temperature State Priority List

Zhaojing Yin, Yanbo Che, Dezhi Li, Huanan Liu and Dongmin Yu
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Zhaojing Yin: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Yanbo Che: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Dezhi Li: China Electric Power Research Institute, Beijing 100192, China
Huanan Liu: Department of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China
Dongmin Yu: Department of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China

Energies, 2017, vol. 10, issue 9, 1-15

Abstract: With the rapid growth of thermostatically controlled loads, active power fluctuation and peak demand growth within an autonomous micro-grid become serious problems. This paper tries to suppress power fluctuation and shave peak demand for a micro-grid through optimizing domestic electric water heaters (controllable load). In this paper, domestic electric water heater models are first built to optimize power flow within a single water heater. Subsequently, the Monte Carlo method is proposed to simulate power consumption of a cluster of domestic electric water heaters. After that, the temperature state priority list method is presented to suppress power flow and shave peak demand for a given micro-grid. Optimization results show that the proposed temperature state priority list method can reduce peak demand by 12.5%. However, it has a wider active power fluctuation range and needs a longer reaction time compared with the simplified temperature state priority list method. In addition, the optimization results show that by increasing the number of controllable loads participating in load scheduling, active power fluctuation can be reduced and the maximum active power of the given micro-grid can be cut. However, to achieve this, about 1.2% of extra electrical energy needs to be generated by the external grid.

Keywords: domestic electric water heater; Monte Carlo simulation; priority list; demand response; load scheduling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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