With the large-scale application of new energy power generation, energy storage systems and power conversion systems (PCS), the grid environment faced by energy storage equipment is becoming increasingly complex.
How to simulate weak grid environments of different strengths? How to verify the operating performance of energy storage inverters under various short-circuit ratio (SCR) conditions?
To address customers’ practical requirements for PCS weak-grid testing, VILVA custom-developed the AC400V-350A weak grid load device. With adjustable reactance and resistance combinations, it delivers a weak grid simulation solution for the R&D, testing and validation of energy storage inverters.
It is not an ordinary load bank, but custom-built specifically for weak grid testing.
According to customers’ actual test specifications, the VILVA AC400V-350A weak grid load device consists of power module, test module, control module, heat dissipation module, protection module and other assemblies.
The core advantage of this weak grid load device lies in its ability to adjust the impedance characteristics of the test system through different combinations of resistors and inductors, so as to simulate weak grid conditions with varying grid strength.
Adjustable short-circuit ratio from 1 to 20, solving the challenge of difficult weak grid simulation.
For energy storage inverter testing, different short-circuit ratios correspond to different grid strengths.
If testing is only performed with fixed impedance, it is difficult to cover diverse application scenarios and systematically verify the performance of the PCS under various weak grid conditions. The VILVA AC400V-350A weak grid load device addresses this issue.
Dual control: local and remote, for greater testing flexibility
The load supports local touchscreen control and remote upper computer control.
On-site commissioning engineers can operate the unit via the touchscreen. When the equipment needs to connect to an automatic test system, remote control is available through RS485/RJ45 communication ports with supporting communication protocols.
One-click switching + Multi-layer Protection
The AC400V-350A weak grid load device is equipped with multi-layer safety protections, including:
Emergency stop, short-circuit protection, temperature protection, fan interlock protection, chassis earthing protection, overcurrent protection and overvoltage protection. The AC400V-350A weak grid load device is a custom-designed product by VILVA for the practical weak-grid testing requirements of power conversion systems (PCS).
From resistance and reactance parameters to short-circuit ratio adjustment; from local control to remote communication; from high-power operation to multi-layer safety protection, every design is developed around customers’ actual testing demands.
