#frequencyresponse

Beta Certification logs for the Western Region (Oct–Dec 2025) reveal a statistical anomaly in Primary Frequency Response compliance.

In October 2025, NTPC Vindhyachal Stage V recorded a Beta score of 0.00.

By December, Stage V showed a perfect 1.00 score, while Vindhyachal Stage II dropped to 0.00.

This alternating failure pattern suggests a tactical manoeuvre to maintain an average Beta score outside severe penalty thresholds.

The issue extends beyond financial incentives into grid physics.

If a stage fails to respond to frequency deviations during a contingency, grid vulnerability increases.

The moving zero mechanism avoids chronic non-performer classification and defers investment in Governor Droop or steam valve upgrades, while stability risks persist.

Western Region Beta Certification for December 2025 shows NTPC Korba achieving a perfect 1.00 frequency response score.

Cross-referencing the 600th OCCM Minutes from the same week reveals unresolved load oscillations and secondary control gaps in the 400 kV corridor Korba feeds.

A generator operating on an unstable, oscillating grid cannot provide perfect stabilising response if frequency is fluctuating due to must-run constraints and HVDC trippings.

A perfect score in such an environment is statistically implausible.

The outcome suggests certification methodology may rely on calm 15-minute blocks while excluding chaotic oscillation periods, producing compliance certificates that do not reflect true emergency performance.

The grid appears compliance-perfect on paper while remaining physically exposed during real frequency events.

Frequency Response Analyzer from Digilogic Systems

Digilogic's Frequency Response Analyzer utilizes swept sine frequency response analysis to provide non-intrusive, and accurate results. It evaluates how a system responds to varying sine wave inputs across different frequencies, offering critical insights into its stability and performance.

Further, our Frequency Response Analyzer (FRA) offers the following benefits: User-friendly Software: Features creative and efficient software for fast, easy handling, and scalability for additional channels. Portable and Compact: Small and portable unit, rugged to withstand harsh environments, is portable for field use. Safety Compliance: Meets safety standards IEC 61010-1, EN 61010-1, UL 61010-1, and CSA 61010-1, ensuring safe operation in various environments.

Applications:

Measuring the frequency response of radar systems, antennas, and RF components to optimize performance.

Analyzing the frequency response of control systems in missiles, aircraft, and spacecraft.

Testing satellite and space systems to validate performance under real-world conditions.

Digilogic's Frequency Response Analyzer utilizes swept sine frequency response analysis to provide non-intrusive, and accurate results. It evaluates how a system responds to varying sine wave inputs across different frequencies, offering critical insights into its stability and performance.

Further, our Frequency Response Analyzer (FRA) offers the following benefits: User-friendly Software: Features creative and efficient software for fast, easy handling, and scalability for additional channels. Portable and Compact: Small and portable unit, rugged to withstand harsh environments, is portable for field use. Safety Compliance: Meets safety standards IEC 61010-1, EN 61010-1, UL 61010-1, and CSA 61010-1, ensuring safe operation in various environments.

Applications:

Measuring the frequency response of radar systems, antennas, and RF components to optimize performance.

Analyzing the frequency response of control systems in missiles, aircraft, and spacecraft.

Testing satellite and space systems to validate performance under real-world conditions.