Journal
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
Volume 13, Issue 4, Pages 2012-2026Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSTE.2022.3179120
Keywords
Voltage control; Transformers; Reactive power; Power quality; Photovoltaic systems; Power system reliability; Active distribution networks; Cooperative systems; Active distribution network; cooperative control; hybrid distribution transformer; power quality; photovoltaic system
Categories
Funding
- Key Research and Development Project of Shaanxi Province [2018 ZDCXL-GY-07-05]
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This paper proposes a hybrid distribution transformer integrating photovoltaics (HDT-PV) with local and remote cooperative control in an active distribution network (ADN). The HDT-PV can maximize the utilization of distributed solar energy and solve power quality problems. Remote cooperative control of multiple HDT-PVs optimizes the reactive power flow in the network. Even in case of device failures, the system can still operate stably.
This paper proposes a hybrid distribution transformer integrating photovoltaics (HDT-PV) with local and remote cooperative control in an active distribution network (ADN). HDT-PVs, regarded as promising devices with high reliability and easy engineering in ADNs, can not only realize the on-site maximum utilization of distributed solar energy but also solve the various power quality problems that follow. Moreover, the reactive power flow in the ADN can be optimized through remote cooperative control of multiple HDT-PVs. In this situation, the two objectives of voltage regulation and network power loss decrease are achieved in the ADN. If the power electronic device in the HDT-PV fails, the HDT-PV is able to work as a conventional distribution transformer by cutting off all power electronic devices and PV systems. Even when a small number of HDT-PVs malfunction, the system can still run stably. Finally, the simulation and experimental results demonstrate the effectiveness of the proposed scheme.
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