A coordinated control method of aggregate AC load for auxiliary frequency regulation service. (May 2023)

• Record Type: Journal Article
• Authors: Dai, Jianfeng; Liu, Yishi; Yan, Cheng; Tang, Yi; Zhou, Xia; Xue, Feng
• Is Part Of: International journal of electrical power & energy systems. Volume 147(2023)
• Publication Date: 2023-05
• Subjects: Fixed-frequency air-conditioner -- Inverter air-conditioner -- Frequency stability -- Load control; Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2022.108912
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: FFAC and IAC are exploited to support the system frequency regulation. Evaluation of FRP can be applied to the optimal scheduling of the power system. The proposed piecewise linear model can estimate the system FRC more precisely. Coordinating aggregate ACs at the day-ahead stage improve the operation flexibility. The method can reduce the control error and the efficiency of information exchange. Abstract: Large-scale fixed frequency air-conditioners (FFAC) and inverter air-conditioners (IAC) are high-quality flexible load resources in the power system. This paper proposes a coordinated control method of aggregate air-conditioner (AC) load for auxiliary frequency regulation services. Firstly, a new method for evaluating the frequency regulation potential (FRP) of aggregate AC is proposed. This method can rapidly evaluate the FFAC and IAC's potential of providing frequency regulation at all stages. Then the day-ahead frequency regulation capacity (FRC) of aggregate AC at each time period is determined based on the frequency and unit commitment constraints. Afterwards, a coordinated control method considering users' comfort level is developed to ensure the sequential operation of each AC and support the frequency regulation of the power grid. Finally, a simulation is conducted to demonstrate that the proposed method can realize the coordinated control of FFAC and IAC and improve the frequency stability of the power system.