157 citations · 266 across the 22 of their papers we have counts for
7 papers · 1 filter
Deriving DERs VAR-Capability Curve at TSO-DSO Interface to Provide Grid Services
Ankit Singhal, Venkataramana Ajjarapu
The multitudes of inverter-based distributed energy resources (DERs) can be envisioned as distributed reactive power (var) devices (\textit{mini-SVCs}) that can offer var flexibili…
Monitoring Long Term Voltage Instability due to Distribution & Transmission Interaction using Unbalanced μPMU & PMU Measurements
Amarsagar Reddy Ramapuram Matavalam, Ankit Singhal, Venkataramana Ajjarapu
This paper extends the idea of the Thevenin equivalent into unbalanced 3ϕ circuits and proposes a 3ϕ long-term voltage stability indicator (VSI), that can identify critical loads i…
Monitoring & Mitigation of Delayed Voltage Recovery using μPMU Measurements with Reduced Distribution System Model
Amarsagar Reddy Ramapuram Matavalam, Ramakrishna Venkatraman, Venkataramana Ajjarapu
This paper proposes a new method to monitor and mitigate fault induced delayed voltage recovery (FIDVR) phenomenon in distribution systems using μPMU measurements in conjunction wi…
Identifying Long Term Voltage Stability Caused by Distribution Systems vs Transmission Systems
Amarsagar Reddy Ramapuram Matavalam, Ankit Singhal, Venkataramana Ajjarapu
Monitoring the long term voltage stability of the power grid is necessary to ensure its secure operation. This paper presents a new phasor based methodology that distinguishes betw…
On Information Transfer Based Characterization of Power System Stability
Subhrajit Sinha, Pranav Sharma, Umesh Vaidya +1
In this paper, we present a novel approach to identify the generators and states responsible for the small-signal stability of power networks. To this end, the newly developed noti…
PMU based Monitoring and Mitigation of Delayed Voltage Recovery using Admittances
Amarsagar Reddy Ramapuram Matavalam, Venkataramana Ajjarapu
This paper analyzes the delayed voltage recovery phenomenon by simplifying the Western Electricity Coordinating Council (WECC) composite load model using the load admittance and th…
Dynamic Co-Simulation Methods for Combined Transmission-Distribution System and Integration Time Step Impact on Convergence
Ramakrishnan Venkatraman, Siddhartha Kumar Khaitan, Venkataramana Ajjarapu
Combined Transmission and Distribution Systems (CoTDS) simulation for power systems requires development of algorithms and software that are numerically stable and at the same time…