关键词: 直接功率控制, 多联机空调, 需求响应, 空调调控, 设备机理极限

Abstract: With the growing flexibility requirements of demand response in domestic power systems, air-conditioning systems, which account for the largest share of building energy consumption, exhibit considerable regulation potential. Owing to the nonlinear relationship between power and temperature, conventional temperature-based regulation modes can hardly satisfy the demand for fast and accurate load regulation. By exploiting the thermal storage capacity of building envelopes and the tolerance of occupants to temperature variation, a model of the air-conditioning system was established, and the advantages of direct power control in terms of response speed and stability were demonstrated. The constraints on direct power regulation of variable refrigerant flow (VRF) air-conditioning systems were systematically analyzed, and a direct power control strategy was developed for VRF systems under the dual objectives of meeting power regulation requirements and satisfying user cooling/heating demands. Through direct regulation of the compressor power, the fast power response of the system within a temperature variation range of ±3 ℃ was experimentally evaluated. The investigation of direct power control for air-conditioning systems based on the mechanism limits of equipment is of great significance for ensuring the sustained stability of air-conditioning regulation by the power system.

Key words: Direct power control, Multi-split air conditioning, Demand response, Air conditioning regulation, Equipment mechanism limit