Does the need for a PSS depend on location?
In the Western United States machines are required to have power system stabilizers to improve the dynamic stability of the system. With the limited transmission capability and high loading expectations of the system, the transmission lines are stressed, which makes them particularly vulnerable to high loading margins and the likelihood of a sustained or growing oscillation after a fault. The power demand on the transmission system continues to spiral as load demands peak daily and the requirements may spread across the US.
For more information on current and proposed NERC requirements, see the technical paper, NERC Policies Affecting the Power Industry.
What about setup and testing of the PSS?
According to NERC/WECC requirements where PSS are utilized, their activity are to be reported and it is likely that performance testing of the generator excitation system will become mandatory.
The PSS-100 offers built in features to perform step tests and automatically log the data to ease the burden of performing required tests and provide permanent records for future analysis.
- Various self-generated test signals are available to inject internally to the PSS-100 or externally into the excitation system. Test signals include Sine, Step, Sine Sweep, and Square Wave modes.
- Dedicated input for external test signal generators.
- Software controlled switches allow test signal insertion at different points in stabilizer algorithm.
- Data logging of PSS-100 internal variables for test results review.
- Programmable logic and serial commands to control tests and data logs.
- Dynamic System Analyzer and Sequence of Events
Today, as test tools are part of the excitation system setup software, you can eliminate hours or even days of setup. One laptop and serial cable can be used for onsite testing.
For more information feature enhancements, see the technical paper, Feature Enhancements in New Digital Excitation System Speeds Performance Testing
Options to consider when adding or replacing a PSS
To learn more about the options Basler provides when adding a Power System Stabilizer and replacing an existing Power System Stabilizer, visit our Basler Solutions page.