Ayyarao S L V Tummala

  Name of the Journal: JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY Title of the article:  A Two-stage Kalman Filter for Cyber-attack Detection in Automatic Generation Control System Abstract: Communication plays a vital role in incorporating smartness into the interconnected power system network. How‐ever, historical records prove that the data transfer has always been vulnerable to cyber-attacks. Unless these attacks are identified and cordoned off, it may lead to black-out resulting in national security issues. This paper proposes an optimal two-stage Kalman filter (OTS-KF) for simultaneous state and attack estimation in Automatic generation control (AGC) system. Bias/at‐tacks  are  modeled  as  unknown  inputs  in  the AGC  dynamics.Five types of attacks namely False Data Injection (FDI), Data Replay Attack, Denial of Service (DoS), scaling, and ramp at‐tacks are injected in the measurements and are estimated using OTS-KF. As the load variations of each area are seldom avail‐a

A. S. L. V. Tummala, “A robust composite wide area control of a DFIG wind energy system for damping inter-area oscillations,” Protection and Control of Modern Power Systems , vol. 5, no. 1, p. 25, 2020, doi: 10.1186/s41601-020-00170-y.   Abstract: This paper presents a novel composite wide area control of a DFIG wind energy system which combines the Robust Exact Differentiator (RED) and Discontinuous Integral (DI) control to damp out inter-area oscillations. RED generates the real-time differentiation of a relative speed signal in a noisy environment while DI control, an extension to a twisting algorithm and PID control, develops a continuous control signal and hence reduces chattering. The proposed control is robust to disturbances and can enhance the overall stability of the system. The proposed composite sliding mode control is evaluated using a modified benchmark two-area power system model with wind energy integration. Simulation results under various operating scenario

Modified vector controlled DFIG wind energy system based on barrier function adaptive sliding mode control Journal name: Protection and control of modern power systems Link:  PDF

DOI: 10.1007/978-981-13-1921-1_14 In book: Smart Intelligent Computing and Applications Link:  full text

In book: Soft Computing in Data Analytics Chapter: Implementation of Grasshopper Optimization Algorithm for Controlling a BLDC Motor Drive Publisher: Springer Nature Link:  https://link.springer.com/chapter/10.1007/978-981-13-0514-6_37

Finite Time Disturbance Observer based Composite Sliding Mode Load Frequency Control for Hybrid Power Systems is accepted for publication in IJE