ePHASORSIM
ePHASORSIM has been engineered since 2011 to simulate exceptionally large and complex transmission and distribution networks in real time. Its high-performance RMS solver not only enables detailed transient stability analysis and seamless integration testing with EMS/SCADA systems, but also brings models from standard RMS simulation tools such as PSS®E, PowerFactory, and CYME into real-time operation.
Whether validating wide-area monitoring, protection, and control schemes (WAMPAC) through hardware-in-the-loop (HIL) scenarios or training operators, ePHASORSIM delivers the speed, scale, and realism needed to mirror the real grid.
Specifications overview
Explore the key hardware and software specifications that enable ePHASORSIM to deliver high-fidelity, real-time simulation of large-scale electromechanical power system.
| Simulation type | RMS |
| Typical time step | 1 ms – 10 ms |
| Compatible modeling environments | Simulink, Excel, PSS®E, CYME, PowerFactory, OpenModelica, Dymola |
| Compatible modeling environments | 1,000,000 1-phase nodes |
| Maximum non real-time network size | Unlimited |
| Capability per processing core | 10,000 nodes @ 10 ms |
They trust us
Demo
Hybrid EMT-RMS co-simulation of the WECC 10,000-bus system
This demo highlights the simulation of the WECC 10,000-bus system using a hybrid EMT-RMS approach. A 9,000-bus portion is simulated in ePHASORSIM at a 10 ms time step, while a 555-bus subsystem—including three generic PV plants—is modeled in HYPERSIM at 50 µs. Interface nodes are represented as PQ loads in ePHASORSIM and as voltage sources in HYPERSIM. With ePHASORSIM embedded as an FMU within HYPERSIM, this setup enables efficient multi-rate co-simulation. This approach combines the scalability of RMS simulations for large systems with the precision of EMT modeling, where detailed accuracy is critical.
Features
Highlights of ePHASORSIM
Designed for those shaping the future of grid reliability, ePHASORSIM empowers engineers with the performance, openness, and scale to confidently simulate and test the most complex power networks in real time.
01
1,000,000+ nodes of mixed T&D systems
ePHASORSIM is not only specifically designed to run extraordinarily large networks in real-time, it can also simulate both transmission and distribution grids at the same time, making it an exception in the market.
02
Get started quickly
Import your existing grid model directly from PSS®E, PowerFactory or CYME for offline simulation acceleration or go directly to real time.
03
Import your custom models
Load and simulate compiled models from Dymola, OpenModelica or Simulink, with tunable parameters, for use as both electrical and control user-defined models.
04
Evaluate the grid under any load condition
Simulate the dynamic behavior of your system under peak demand, low-load scenarios, or high IBR penetration by testing a wide range of realistic or extreme load profiles—all in real time.
Testimonials
Trusted by industry leaders
Explore how Tenaga Nasional Berhad (TNB) leveraged ePHASORSIM to achieve remarkable results.
By integrating ePHASORSIM into our workflow alongside PSSE and PowerFactory, we were able to simulate our 1,100-bus grid in real time and uncover potential design issues early in the process. This dramatically increased our confidence in the system-level validation of our Special Protection Schemes, minimized the risk of hidden failures, and reinforced our commitment to power system reliability.
Nik Sofizan Nik Yusuf
Chief Engineer – Grid of the Future at Tenaga Nasional Berhad
Use cases
Helping power labs and research facilities
ePHASORSIM helps power labs and research facilities focus on critical areas for modern grid operations.
- Real-time transient stability simulations for systems in the range of 100,000+ nodes
- Wide-area control/protection/state estimation algorithms
- EMS tools and algorithms, such as AGC and load shedding
- PMU streams and PDC applications
- System studies with massive numbers of renewable penetration
- Design and test local controllers, such as voltage regulators
- Advanced metering and information network
- Impact of load profiles in distribution networks
This comprehensive approach makes ePHASORSIM a powerful tool for research and development in power systems.
Applications
Advancing your testing with ePHASORSIM
ePHASORSIM enables real-time RMS simulation of large-scale power systems for utilities, operators, and researchers. It supports critical applications such as wide-area monitoring, protection and control systems (WAMPAC), grid digitalization and cybersecurity assessment, and operator training.
With high-performance phasor-domain simulation and seamless integration with EMS/SCADA systems, ePHASORSIM helps stakeholders validate complex control strategies, improve situational awareness, and build resilient, future-ready grid operations.
Wide-area monitoring protection and control
ePHASORSIM serves as a tool to develop new control and measurement algorithms for Wide Area Monitoring Protection and Control (WAMPAC) applications.
Cybersecurity
ePHASORSIM is employed as a powerful and efficient testing tool to emulate real-world cyberattacks and communication system failures in a controlled environment.
Operator training
ePHASORSIM is used for operator training for transmission and/or distribution systems using either balanced positive-sequence network models or unbalanced phase-by-phase network models.
FAQ
Find the answers to your questions
What communication protocols do you support?
Consult our comprehensive list of supported protocols here.
Resources
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