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A photovoltaic (PV) transformer box, also known as a combined transformer for PV power plants, is a prefabricated electrical device that integrates a step-up transformer, high and low voltage switchgear, protection and control devices, and reactive power compensation devices. It is specifically designed for PV grid-connected power generation systems. Its core function is to step up the low-voltage DC power generated by PV modules (converted to low-voltage AC power by an inverter) to the grid voltage. It also performs functions such as power metering, protection, and monitoring. It features a compact structure, convenient installation, low operation and maintenance costs, and adaptability to harsh outdoor environments, making it one of the core step-up devices in PV power plants.
American-style prefabricated substations are compact outdoor power distribution equipment that highly integrates core components such as step-down transformers, high-voltage load switches, fuses, and low-voltage switchgear. Originating from American power distribution network design concepts, their core features are small size, low cost, and convenient installation. They are widely used in outdoor power distribution scenarios such as urban power distribution networks, residential communities, industrial and commercial parks, and street lighting power supply, and are commonly used equipment at the end of 10kV/20kV power distribution networks.
European-style prefabricated substations (referred to as European-style prefabricated substations) are prefabricated outdoor power distribution equipment that independently arranges electrical components such as high-voltage switchgear, distribution transformers, low-voltage switchgear, reactive power compensation devices, and metering and protection devices in separate compartments. Originating from European power distribution network design concepts, their core features are layered compartmentalized structure, convenient inspection and maintenance, and strong expandability. They are widely used in outdoor power distribution scenarios such as urban power distribution networks, industrial parks, high-rise buildings, and municipal engineering projects, and are one of the mainstream equipment in 10kV/20kV power distribution network systems.
