Unified Coordination Control of MPPT and Frequency Support for Single-Stage Multiport Inverter-Connected PV-ESS Hybrid Systems

被引：0
|
作者：
Liu, Lijie [1 ]
Zhou, Dehong [2 ,3 ]
Wan, Yuxing [3 ]
Zou, Jianxiao [2 ,3 ]
机构：
[1] Chongqing Univ, Sch Elect Engn, Chongqing 400044, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Automat Engn, Chengdu 611731, Peoples R China
[3] Univ Elect Sci & Technol China, Shenzhen Inst Adv Study, Shenzhen 518110, Peoples R China
来源：
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS | 2025年 / 13卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Topology; Maximum power point trackers; Inverters; Vectors; Frequency control; Hybrid power systems; Synchronous generators; Support vector machines; Switches; Stability analysis; Coordination strategy; energy storage system (ESS); photovoltaic (PV) generation; single-stage multiport inverter (SSMI); virtual synchronous generator (VSG); FLEXIBLE POWER-CONTROL; PHOTOVOLTAIC SYSTEMS; CONVERTERS; VOLTAGE; DESIGN; SCHEME;
D O I：
10.1109/JESTPE.2024.3474729
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Integrating the energy storage system (ESS) into photovoltaic (PV) generation systems is an effective solution to realize frequency support. The single-stage multiport inverter (SSMI) offers a high-efficiency solution for PV-ESS hybrid systems compared to conventional two-stage configurations due to the removal of dc/dc converter. However, it is challenging to realize maximum power point tracking (MPPT) and frequency support simultaneously due to the coupled power flows in SSMI. To address this issue, two independent power buffers are developed to smooth PV generation fluctuations and deal with frequency change. On top of that, a unified control is proposed to coordinate the power buffers by regulating the charge/discharge of ESS. Besides, the operation capacity and stability analysis of the proposed unified coordination strategy are derived in detail. Finally, experimental tests are carried out to verify the effectiveness of the proposed solution. With the proposed unified coordination strategy, the MPPT of the PV unit and desirable frequency support are realized simultaneously. Moreover, the proposed SSMI-based solution shows around 2% higher system efficiency than the conventional two-stage strategies.
引用
收藏
页码：1041 / 1052
页数：12
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