Challenges Addressed

DSIM for Grid Compatibility

● Comprehensive Element Library

Analyzing SST grid compatibility requires modeling not only power electronics and their controls but also essential grid elements. DSIM provides an extensive built-in element library for SST grid compatibility simulations, including: switching modules (T-type, ANPC, DNPC, etc.), passive elements (RLC, transformers, coupled inductors, etc.), control modules (THD, PLL, filters, PI controllers, logic blocks, lookup tables, etc.), modulation strategies (SPWM, SVPWM, phase-shift control, variable-frequency control, etc.), renewable energy elements (solar, wind, batteries, etc.) All core elements required for SST grid simulations are readily available for immediate use.

● Excellent Simulation Performance

DSIM Solutions for Grid Compatibility

SST systems can be large-scale (e.g., multiple SSTs in a network), and grid compatibility analysis may involve lengthy dynamic processes (e.g., low-voltage ride-through requiring seconds of simulation). Slow simulation speeds then become a bottleneck. DSIM delivers unprecedented simulation speeds to support large-scale system simulations (e.g., multi-SST grids). Traditional methods rely on simplified models like switch averaging, which cannot accurately capture switching ripple and high-frequency dynamics. With DSIM, complex systems with multiple SSTs can be simulated using detailed switching models at speeds 10-100x faster than other tools, enabling system-level grid compatibility analysis that is impractical with alternatives.

● Seamless Co-Simulation Capability

SST grid compatibility analysis may span multiple simulation tools (e.g., part of the system implemented in MATLAB/Simulink). DSIM supports co-simulation with MATLAB/Simulink, allowing users to leverage DSIM's superior power-stage simulation alongside MATLAB's advanced control algorithm development for optimized grid compatibility design and validation.

Resources

● Case

● Paper

● Tutorial

1. Three-Port SST (with PV Integration)

This case demonstrates a three-port SST with a DC port connected to a PV module and DC/DC converter. It only takes 1 second to finish 0.5 second simulation. (Circuit download link is attached below.)

2. Co-Simulation - LLC Isolated DC-DC Converter

This case simulates an LLC circuit, a common module in SST designs. The control section is implemented in MATLAB/Simulink, while the main circuit is simulated in DSIM. (Circuit download link is attached below.)