I. Core Product Overview

The integrated cabinet transformer for photovoltaic (PV) energy storage and inversion (also known as the integrated PV energy storage and step-up cabin) is a highly integrated PV box-type substation equipment. Its core advantage lies in the centralized integration of key equipment such as the Power Conversion System (PCS), step-up transformer, high-voltage ring main unit, and low-voltage distribution box into a single container or an integrated combined design. This significantly simplifies the processes of transportation, installation, use, and maintenance, and provides an efficient and convenient overall solution for PV energy storage systems.

The equipment supports flexible customization. The capacities of the PCS and step-up transformer can be accurately selected and matched according to the actual needs of customers. Moreover, it has the "plug-and-play" feature, which can effectively shorten the project deployment time and improve the overall operation efficiency.

II. Core Technical Advantages (Compared with Traditional Systems)

Compared with the traditional energy storage system mode, where the energy storage converter and step-up transformer need to be purchased separately and then coupled in the later stage, this product has significant advantages:

Better Cost-effectiveness: The integrated design integrates the functions of two core pieces of equipment, reduces the separate procurement links, and directly lowers the total equipment procurement cost.

Higher Efficiency: It innovatively combines the two voltage conversion processes of "step-up + step-down" in the traditional system, simplifies the energy conversion path, and greatly improves the working efficiency of the entire energy storage system.

III. Overall Requirements and General Specifications

(I) Overall Configuration Requirements

The standard configuration of the integrated step-up cabin includes:

1 unit of 1.25MW Power Conversion System (PCS): To be provided by Party A.

1 unit of dry-type transformer: With a capacity of 1250kVA, a voltage transformation level of 10kV/0.69kV, and supporting auxiliary equipment.

(II) General Technical Requirements

l Anti-corrosion Performance: The anti-corrosion grade of the cabin body shall reach Grade C3 to ensure long-term use outdoors or in complex environments and effectively resist corrosion.

l Transformer Parameters:

l Insulation Class: Class F, meeting the insulation performance requirements in high-temperature environments.

l Material: Copper windings are adopted to ensure electrical conductivity and equipment durability.

l Energy Efficiency Level: In line with the SCB11 standard, and supports 1.1 times overload operation to adapt to short-term high-load working conditions.

l Appearance and Marking: The cabin body LOGO, product nameplate style, and surface coating color shall be customized after confirmation with the technical personnel of Party A, and the default color shall be determined through communication between both parties.

l Power Supply Guarantee: The Uninterruptible Power Supply (UPS) equipped in the cabin shall meet the requirement of 30-minute uninterrupted power supply to ensure the stable operation of core control equipment in case of sudden power failure.

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河北科鼎智能科技有限公司

PCS Energy Storage Converter-Booster Integrated Machine