157 citations · 266 across the 22 of their papers we have counts for
6 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…
A Framework to Utilize DERs' VAR Resources to Support the Grid in an Integrated T-D System
Ankit Singhal, Venkataramana Ajjarapu
Increasing penetration of inverter-based distributed energy resources (DERs) opens up interesting opportunities for the transmission systems. We present a hypothesis that the numer…
Real-Time Local Volt/VAR Control Under External Disturbances with High PV Penetration
Ankit Singhal, Venkataramana Ajjarapu, Jason. C. Fuller +1
Volt/var control (VVC) of smart PV inverter is becoming one of the most popular solutions to address the voltage challenges associated with high PV penetration. This work focuses o…