Decentralized Active Power Control of PV Inverters in Residential Microgrids
Event details
| Date | 10.01.2017 |
| Hour | 14:15 › 15:15 |
| Speaker | Pulkit Nahata |
| Location | |
| Category | Conferences - Seminars |
Abstract
Solar PV based generation is a commonly observed form of distributed generation in low voltage networks. Residential PV systems depending upon their capacity partly feed the local loads. This reduces the stress on the distribution networks and improves the system performance by reducing feeder losses. However, a high penetration of PV resources results in local voltage rise during net power generation. This leads to an overvoltage and damages the connected loads. We propose a decentralized integral controller to curtail excess active power in order to avoid overvoltage. We prove the stability of the resulting closed-loop system and guarantee that voltages of the generating nodes are within the bounds specied by the grid standards. Considering the voltage and active power constraints, we show that the proposed controller leads to maximum power transfer into the grid. We discuss the objective of fair power curtailment and show that it is in contrast with our objective of maximum power transfer. We also show that a voltage control is not be required for a few PV generators satisfying certain conditions. Finally, the performance of the controller is presented through simulation studies.
Brief Bio
Pulkit Nahata graduated with a MSc in Electrical Engineering from ETH Zürich in 2016. He specialized in systems and control with applications to power and energy systems. He jointly conducted his master’s thesis with the Automatic Control Lab, ETH Zürich and ABB Corporate Research, Baden, where he investigated the problem of overvoltage in microgrids with high PV penetration.
He conducted his Bachelor’s thesis on motion control of underwater vehicles at IIT Bombay, and has previously held positions with IISc Bangalore, Vestas Wind Systems, and ONGC India. His research interests are surrounded around distributed control of networked and complex systems with applications to energy and dynamic systems, distributed sensor networks, and underwater vehicles.
Solar PV based generation is a commonly observed form of distributed generation in low voltage networks. Residential PV systems depending upon their capacity partly feed the local loads. This reduces the stress on the distribution networks and improves the system performance by reducing feeder losses. However, a high penetration of PV resources results in local voltage rise during net power generation. This leads to an overvoltage and damages the connected loads. We propose a decentralized integral controller to curtail excess active power in order to avoid overvoltage. We prove the stability of the resulting closed-loop system and guarantee that voltages of the generating nodes are within the bounds specied by the grid standards. Considering the voltage and active power constraints, we show that the proposed controller leads to maximum power transfer into the grid. We discuss the objective of fair power curtailment and show that it is in contrast with our objective of maximum power transfer. We also show that a voltage control is not be required for a few PV generators satisfying certain conditions. Finally, the performance of the controller is presented through simulation studies.
Brief Bio
Pulkit Nahata graduated with a MSc in Electrical Engineering from ETH Zürich in 2016. He specialized in systems and control with applications to power and energy systems. He jointly conducted his master’s thesis with the Automatic Control Lab, ETH Zürich and ABB Corporate Research, Baden, where he investigated the problem of overvoltage in microgrids with high PV penetration.
He conducted his Bachelor’s thesis on motion control of underwater vehicles at IIT Bombay, and has previously held positions with IISc Bangalore, Vestas Wind Systems, and ONGC India. His research interests are surrounded around distributed control of networked and complex systems with applications to energy and dynamic systems, distributed sensor networks, and underwater vehicles.
Practical information
- Informed public
- Free
- This event is internal
Organizer
- Laboratoire d'Automatique http://la.epfl.ch/