Bidirectional AC Sources / Sinks
Bidirectional AC sources/loads, also referred to as regenerative AC power supplies or grid simulators with energy recovery, combine the functionality of an AC power source and an electronic AC load in a single system. They can both supply energy to the device under test and absorb it, feeding it back to the grid, enabling realistic and dynamic testing conditions.
The portfolio includes single- and three-phase systems ranging from compact solutions to high-power systems in the kVA range. They offer freely adjustable voltage, frequency, and waveforms, as well as variable power factor and true bidirectional energy flow for advanced test environments.
Typical applications include testing inverters, power supplies, UPS systems, and electric drives, as well as simulating grid conditions and energy flows in grid-connected systems. In addition, bidirectional AC systems are widely used for validating renewable energy systems (e.g., PV inverters and energy storage), grid compliance testing, automated test equipment (ATE), and research and development.
With energy fed back into the grid, these systems provide high efficiency while reducing power consumption and heat dissipation. Combined with high regulation accuracy, fast dynamic response, and flexible programmability, bidirectional AC sources/loads deliver precise, cost-efficient, and sustainable test solutions for modern power and grid simulation applications.
What is a bidirectional AC source and sink?
A bidirectional AC source and sink can both generate and absorb alternating current in a controlled manner. It combines the functions of a programmable AC power supply, an electronic AC load, and a grid simulator.
These systems are suitable for testing inverters, energy storage systems, chargers, UPS systems, and grid-connected power electronics. Absorbed energy can often be fed back efficiently into the mains.
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