Summary
Electromagnetic transient (EMT) simulation tools have been extensively used for analysing and studying power systems. The ability of EMT simulation tools to capture non-linearities and high-frequency switching transients is a key factor driving their adoption in the study of modern power systems, which increasingly include power electronic devices [1]-[2]. While the use of such tools is well-established in applications such as HVDC systems and renewable energy, their application in studies related to the operation and protection of assets like generators is less documented.
Read more Read lessThis paper highlights the application of EMT tools in studies focusing on the operation and control of synchronous generators connected to the power grid. It emphasizes the critical role of library components, such as electric machine models, in accurately representing phenomena of interest. The paper also traces the evolution of these models based on real-world applications, demonstrating the relationship between the level of detail in the models and the fidelity of simulation results. Furthermore, the theoretical aspects of modelling electric machines for offline and real-time EMT simulation tools are discussed.
Several examples of studies related to the operation and control of synchronous generators are presented in this paper, along with their conclusions:
Example 1: An AVR (Automatic Voltage Regulator) for a Power Plant Synchronous Generator is modelled, tested and characterized. The simulation results are validated against field measurements, demonstrating the capability of the simulation tool in verifying the AVR block diagram and assessing its sensitivity to input parameters.
Example 2: The power system stabilizer function of an exciter is tested and validated through both simulation and field measurements. The study evaluates sensitivity to various variables and configuration parameters.
Example 3: A grid code is implemented and validated for a synchronous condenser. The dynamic behaviour of the machine and the grid during short-circuit Fault Ride-Through and
Rate-of-Change-of-Frequency transients in different cases are analysed. The study evaluates sensitivity to electromechanical variables and assesses stress on components during these transient conditions.
Additionally, the paper explores the transient analysis of black start procedures for a synchronous condenser using an SFC (Static Frequency Converter) and a D/G (Diesel
Generator) Set. The findings provide insights into the dynamic interactions among the devices inserted in the circuit and their preliminary dimensioning during black start scenarios.
As it will be shown in these examples, EMT simulation tools demonstrate superior capabilities compared to RMS-based simulation tools, as aspects such as point-on-wave simulation and detailed representation of exciter firing pulses can be represented in the EMT simulation tools.
Also, real-time simulation allows physical devices such as AVRs and SFC controllers to be tested using the simulator.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | C4_11859_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Canada |
| Study committees |
|
| File size | 2 MB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
DEHKORDI Ali B - RTDS Technologies Inc., Canada; FLORIO Andrea - Ansaldo Energia SpA, Italy
Keywords
Power Plant, Synchronous Generator, Synchronous Condenser, Static Frequency Converter, Diesel Generator, Excitation System, Automatic Voltage Regulator, Power System Stabilizer, Short-Circuit Fault Ride-Through, Rate-of-Change-of-Frequency
