Ⅰ. Background

　　Benefiting from the rapid development of the energy storage industry, the market for energy

 storage inverters (PCS) is growing rapidly. It is expected that in 2023, the China market size for energy storage inverters will exceed 9.7 billion USD. With the release of the national policy "14th Five-Year Plan for the Development of New Energy Storage," combined with the explosive growth in the photovoltaic energy storage industry from the market perspective, and the increasing maturity of high-power PCS technology from the technical aspect, the large-scale development of integrated photovoltaic storage and charging will become a driving force in the full-speed advancement of the dual carbon strategy.

　　2019-2023 China Energy Storage PCS Market Scale(Billion USD)

　　Ⅱ. Key points of Testing

　　As integrated photovoltaic storage is applied on a large scale, the market demand for energy storage PCS generally exceeds 500kW. Additionally, in accordance with national standards, energy storage PCS must undergo relevant performance testing and verification during the testing and production stages. This requires a professional simulation power source to conduct the tests, and it should have the following functions:

　　1. The power source supports solar photovoltaic panel simulation function.

　　2. It has I-V curve simulation capability.

　　3. It features energy regenerative capabilities, receiving load energy, which can be fed back to the grid.

　　4. It possesses internal resistance functionality to simulate voltage drops caused by external cables.

　　5. It offers dual-channel output; a single source with dual channels supports parallel connection and has dual-machine linkage programming capabilities. Multiple power sources of the same model can be paralleled.

　　6. It provides constant voltage, constant current, constant resistance, constant power, programming, and photovoltaic standards (EN50530/Sandia) dynamic and static MPPT tracking, photovoltaic array, and shadow occlusion functions.

　　7. It includes an operating interface and backend software, offering control commands for integration and supports third-party interfaces (CAN/RS485/LAN). The upper computer software allows one interface to control multiple power sources.

　　Ⅲ. Solution

　　The Ainuo 500kW bidirectional PV simulator power supply utilizes high-frequency isolation technology, is compact in size, and features various optimized parallel technologies, supporting multiple parallel modes for the equipment. With its multi-channel isolated output characteristic, it can support simultaneous testing of up to 8 devices, and can monitor and display the working status and parameters of multiple devices in real-time. It meets the requirement of dual-channel output, with an output voltage range of 24-2000Vdc, and a single-channel output current of 500A. It supports frequent startups and can meet the needs of long-duration testing experiments.

　　(1) Product Features

　　1. Offers multiple working modes including CV (Constant Voltage), CC (Constant Current), CP (Constant Power), and CR (Constant Resistance) for selection.

　　2. Features 999 programmable steps, supporting millisecond-level timing settings.

　　3. Standard photovoltaic array curve simulation is available, supporting both static and dynamic modes.

　　4. Equipped with a 3-stage battery model, supporting the import and export of battery model data.

　　5. Programmable protection functions and limit functions are available to ensure the safety of devices tested at different voltage or power levels.

　　6. Supports seven types of battery modes including lithium ternary, lithium iron phosphate, lithium manganate, lithium cobaltate, lithium titanate, nickel-hydrogen, and lead-acid.

　　(2) Product Highlights

　　1. Energy regenerative capability, with a feedback efficiency greater than 93%.

　　2. Intelligent temperature control system that maintains constant internal temperature in real-time.

　　3. Powerful upper computer software for multi-channel synchronous control.

　　Photovoltaic SAS Simulation Function / EN50530 Model / Sandia Lab Model

　　Dynamic MPPT / EN50530 Dynamic Simulation / SandiaLab Dynamic Simulation

　　Mask Mode / Battery Simulation / Waveform Editing

　　4. High-frequency isolation technology, lightweight design, and multiple safety protection designs ensure more reliable device operation.

　　5. IP54 protection level, containerized high-power custom models, with power greater than 2MW, suitable for outdoor use.

　　6. Dual-channel output, with channels that can be paralleled, supports 8-way parallel output. Multiple power sources of the same model can be paralleled to expand power.

　　7. High precision output with voltage accuracy: 0.05% FS, current accuracy: 0.1% FS, low ripple output: 0.05% FS, and voltage slew rate: 200V/ms.

　　Ⅳ. Conclusion

　　As a professional supplier of testing equipment for the new energy photovoltaic storage industry, Ainuo has undergone years of refinement in product design and functional configuration. It can fully meet the technical specifications required by various users, effectively support customers in enhancing production efficiency and optimizing cost structure, and has won the favor of many new energy photovoltaic storage manufacturers through its high-quality products and services.