Technology
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PCS inverters have been widely used in various fields such as renewable energy grid connection, distributed power generation and AC/DC microgrids, electric vehicle energy storage applications, power transmission and distribution, and auxiliary services. In order to ensure the healthy and friendly grid operation of energy storage systems, during the industrial "R&D-production-testing" iteration process, research and test engineers need to repeatedly modify controller parameters and test conditions to conduct a series of energy storage inverter tests under different operating conditions. Based on the characteristics of building arbitrary topology models and high accuracy using semi-physical simulation, the adoption of Hardware-in-the-Loop (HIL) semi-physical hardware testing for energy storage system grid connection has gradually become a mainstream trend.
In terms of products, they have an attractive appearance, simple and flexible software, and are easy to use, which makes it easy for beginners to get started. In terms of service, the technical support is timely, and they can solve problems well and quickly every time, which is very good!
Using the MT 8020 simulation platform of ModelingTech to simulate a traditional multi-energy storage inverter low-voltage parallel system, the energy storage battery is simulated within the CPU. Multiple energy storage inverters and power electronic components such as the grid are placed in a single simulation FPGA or divided into multiple simulation FPGAs for simulation. The simulation is connected to the actual controller via physical IO interface or fiber optic SFP. The energy storage battery state information is transmitted to the Battery Management System (BMS) through communication protocols such as MODBUS and CAN, enabling testing of the multi-energy storage inverter low-voltage parallel system. The powerful CPU and FPGA simulation capabilities of the MT 8020 simulator, along with its device-level parallel expansion capability, assist companies in conducting functional testing and technological updates for new energy storage inverters.
1us step can simulate 3-5 energy storage inverter systems; equipped with a domestically pioneered LC and RonRoff hybrid modeling method, it is suitable for various application scenarios ranging from low frequency to high frequency.
Support high speed and wide voltage range (-25V, 25V) digital input, adapted to industrial inverter controller interface; support MODBUS TCP, MODBUS RTU, CAN, serial port and other professional power communication protocols, convenient to achieve information interaction with the controller.
Support parallel simulation on multiple CPU cores, and a single-core CPU can handle the operation of hundreds of energy storage batteries with a simulation step size of 50 microseconds.
Support up to 8 sfp fibre-optic signal modules, can easily achieve physical IO expansion or multi-device parallel simulation, to meet the requirements of HVC large system testing.
Provide professional automation test Python API, convenient for industrial users to develop automation test project; support “HIL Scope” high-speed recording function, can achieve 500k sampling rate for multi-channel waveform observation.
According to the testing standard requirements of the "Technical Specifications for Energy Storage Inverter Testing", different active and reactive power instructions are set while the energy storage inverter is operating in normal grid-connected mode, and the changes in active and reactive power of the energy storage inverter are observed to determine if they accurately and rapidly track the active and reactive power instructions.
According to the testing standard requirements of the "Technical Specifications for Energy Storage Inverter Testing", the response capability under different transient voltage drop conditions is tested to ensure that the energy storage inverter can operate stably and safely during grid voltage fluctuations.
According to the testing standard requirements of the "Technical Specifications for Energy Storage Inverter Testing", the energy storage inverter must safely and stably achieve grid-connected/off-grid switching.
According to the testing standard requirements of the "Technical Specifications for Energy Storage Inverter Testing", the minimum time for charge-discharge transition of the energy storage inverter should be less than 100ms.
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