Weak Connection Regulation Technology for Source-Storage-Load Collaborative Microgrids Based on Direct Power Control

doi:10.11930/j.issn.1004-9649.202412093

Abstract

Abstract:

The development of distributed energy has transformed buildings into new energy complexes integrating generation, storage, and consumption. However, the fluctuation and randomness of photovoltaic power generation and equipment power consumption leads to the grid and regional supply and demand imbalance. So it is necessary to optimize the configuration of the regional source-storage-grid-load to enhance the efficiency of the regional power consumption and tap into the adjustable potential, achieving fast response and regulation. This paper built a user-side source-storage-grid-load DC power supply system, analyzed the characteristics of each device of the system, proposed a power direct-control flexible regulation algorithm, and conducted verification in the PV future houses of Zhuhai Gree Electric Appliances. The paper also studied the regional DC power supply and flexible regulation technology, analyzed the flexible characteristics of air conditioners, energy storage, photovoltaic, etc., and verified the power direct-control flexible regulation algorithm and evaluation indexes. From the effect of testing and verification, the whole system enables real-time response and rapid adjustment, thus improving the energy utilization efficiency, reducing the grid-side quota and realizing the local consumption of PV.

Key words: source-storage-grid-load DC system, flexible load, power direct control type, flexible regulation, energy configuration

REN Peng, ZHAO Zhigang, GAO Hongchao, WEN Wu, JIANG Yingyi. Weak Connection Regulation Technology for Source-Storage-Load Collaborative Microgrids Based on Direct Power Control[J]. Electric Power, 2025, 58(4): 13-20.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202412093

https://www.electricpower.com.cn/EN/Y2025/V58/I4/13

Figures/Tables 9

Fig.1 Schematic diagram of regional source-storage grid-load DC control system configuration

Table 1 Classification of flexible loads

类型		含义
基础型负荷		基础保障类负荷
环境型负荷		满足生活、工作、生产等环境保障类负荷
功能型负荷		满足生活、工作、生产等必须功能负荷
舒适型负荷		改善类负荷

Fig.2 Energy storage regulation algorithm logic

Fig.3 The air conditioner regulation algorithm logic

Fig.4 Weekly data profile of regional office scenarios

Fig.5 Power variation curve of regional office scenarios

Table 2 Analysis of regulatory effects

评价指标	调控前	调控后
自给自足率	0.0900	0.2200
峰平比	5.55	1.72
峰时用电占比	0.3700	0.3000

Fig.6 Energy storage regulation

Fig.7 Air conditioner regulation power

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