
Grid Simulators
Frequently Asked Questions
A grid simulator is a programmable AC or DC power source that emulates utility grid conditions to test grid-connected devices like inverters, EV chargers, and renewable energy systems. It replicates voltage, frequency, and phase variations to ensure product reliability and standards compliance.
Our grid simulators are regenerative 4-quadrant AC & DC power sources and are ideal for a wide range of applications up to 200Hz. Even if you don’t need to simulate the grid, the regenerative, bidirectional capability is also ideal for managing back EMF for applications such as motors.
Power Hardware-in-the-Loop (PHIL) is a real-time testing approach that connects actual power devices—such as inverters, EV chargers, or battery systems—to a simulated grid environment. Unlike traditional simulations, PHIL allows the hardware to exchange real electrical power with a programmable power source, typically a grid simulator. This setup makes it possible to safely test how the device behaves under realistic and dynamic grid conditions—like voltage fluctuations, frequency shifts, or fault events—without needing a live grid connection. PHIL is essential for validating distributed energy resources (DERs), V2G systems, and smart inverters to meet modern grid standards. The GSZ Series has a PHIL amplifier to easily connect with a RT system.
Pre-written test sequence options are available with our grid simulators to simplify testing to IEEE 1547.1, UL 1741, and IEC grid compliance standards. Our built-in SmartSource Suite increases productivity and saves time.
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