Traditional testing methods, which rely on the real grid or basic power sources, are limited in test scenarios and often suffer from high energy consumption, safety risks, and poor repeatability.

The emergence of programmable grid simulators addresses these challenges, making them an indispensable tool in modern power electronics testing.

1. Limitations of Traditional Testing Methods

• Dependence on the real grid
  Limited by grid stability and safety constraints, making it difficult to simulate extreme conditions such as voltage dips, frequency variations, and harmonic disturbances.
• Limited test scenarios
  Challenging to replicate complex grid faults or country-specific grid standards.
• High energy waste
  Energy generated during testing is typically dissipated as heat, conflicting with energy efficiency and sustainability goals.
• Fragmented equipment and high cost
  Multiple devices are required for power supply, load, and grid simulation, resulting in low integration and large system footprint.

2. Key Advantages of Programmable Grid Simulators

Taking the ITECH IT7900P Series as an example, programmable grid simulators offer the following advantages:

1). All-in-One Testing Platform

The IT7900P integrates grid simulation, AC power supply, and regenerative load into a single unit, supporting full four-quadrant operation.
Users can perform multiple test tasks without switching equipment, significantly improving efficiency and utilization.

2). Flexible and Programmable Grid Emulation

Capable of simulating voltage and frequency fluctuations, harmonic/interharmonic injection, phase jumps, and low-voltage ride-through (LVRT).

Built-in waveforms comply with IEC 61000 standards and support custom waveform import, meeting global grid compliance requirements.

3). High-Efficiency Energy Regeneration

With SiC technology and regenerative design, energy from the DUT can be fed back to the grid with efficiency up to 91%, reducing both power consumption and cooling costs.

4). High Power Density and Scalability

Delivers 15 kVA in a 3U form factor and supports parallel expansion up to 960 kVA, suitable for both R&D labs and high-power production testing.

5). Rich Test Modes and Protection Mechanisms

Supports AC, DC, AC+DC, and DC+AC output modes.

Advanced functions include LIST, SWEEP, and Surge & Sag testing.

Built-in multiple protection mechanisms and software watchdog ensure DUT and system safety.

6). Intelligent Control and Remote Integration

Equipped with a touchscreen interface and PC software (PV7900P).

Supports multiple communication protocols (CAN, LAN, GPIB), enabling seamless integration into automated test systems.

3. Typical Application Scenarios

4. Technical Highlights of the IT7900P Series

• SiC Technology: Improved efficiency and power density
• Phase Locking Function: Supports 6-phase / 12-phase simulation
• Data Logging & Harmonic Analysis: Continuous recording with up to 50th harmonic measurement
• Multi-Channel Independent Testing: Simultaneous testing of up to 3 DUTs, increasing throughput

5. Conclusion

Programmable grid simulators are more than just testing tools—they are essential infrastructure for advancing power electronics innovation.

By providing a highly integrated, programmable, and energy-efficient platform, they enable engineers to build realistic, controllable, and repeatable test environments across R&D, certification, and production stages.

This accelerates time-to-market while improving system reliability.

The ITECH IT7900P Series, with its advanced architecture and powerful simulation capabilities, has become a core solution for testing in renewable energy, electric vehicles, and energy storage systems—helping companies meet the challenges of future power grids.