BANGAR RAJU L | Jntu College Of Engineering, Hyderabad (original) (raw)
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National Research University “Higher School of Economics” (HSE), Moscow, Russia
Università Cattolica del Sacro Cuore (Catholic University of the Sacred Heart)
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Papers by BANGAR RAJU L
International Journal of Engineering & Technology
The Microgrid consists of distributed energy resources, DERs(distributed generators - DGs) and di... more The Microgrid consists of distributed energy resources, DERs(distributed generators - DGs) and distributed storages - DSs), loads, PCC, energy management controllers etc., which are required for effective, efficient, reliable and seamless operation of microgrid in both grid connected mode and islanded mode. The heart of the microgrid is the integration part of the DERs with energy management controllers. Out of the methods available, hierarchical method of integrating DERs is selected in this paper. The method is based on the principle of hybrid particle swarm optimization (PSO) which takes into account of genetic algorithm (GA) and PSO. In this paper, the best part of particle to particle information sharing in GA is combined with fast convergence option in PSO, to get the optimum solution with minimum no of iterations. Integration of DERs is nothing but energy management in supply side management (SSM) as well as demand side management (DSM). DSM consists of load shedding or load ...
Elsevier
Modern Microgrid can operate either in grid or islanded mode. In general the Microgrid is in sync... more Modern Microgrid can operate either in grid or islanded mode. In general the Microgrid is in synchronism
with the main grid or utility grid with all its Distributed Generators (DGs), Battery Energy Storage
Systems (BESS) and loads via Static Transfer Switch (STS), thorough Point of Common Coupling (PCC).
This is normal condition. In grid connected mode the controller allows the DGs, to share the load proportionally.
In this condition the DGs and the storage system must supply power to the loads and the excess
power is to be exported to Grid on a pre-determined tariff. When everything is in steady state condition
for any disturbance like a fault on the grid, the Microgrid is to be transferred seamlessly to islanding
mode with an islanding detection method. To achieve this, a Phase Locked Loop (PLL) controller has to
monitor the magnitude of frequency, voltage and phase of the main grid at PCC and give open command
to the Static Transfer Switch within a preset time, before voltage transients are introduced into the
Microgrid. And again in this islanding mode, inverter controlller should adopt P-Q control for load sharing
and also V-f control as the main grid is not available. But re-synchronization back to grid is a planned
program. It has to monitor all the parameters like voltage, frequency and phase angle at PCC, and then
it should be connected back to main grid seamlessly via Synchronizing Controller, through static transfer
switch.
In this paper two DGs are used to test the stability criterion, one is PV and the other is Battery. Rate Of
Change Of Frequency (ROCOF) method of Islanding Detection is used in this paper. An automatic load
shedding technique also used to maintain PCC frequency with segregation of essential and non esssential
loads as a first step in islanded mode to achieve stability. Battery system will be in discharge
mode to maintain voltage of Microgrid in islanding but during grid mode it changes to charging mode
(SOC).
International Journal of Engineering & Technology
The Microgrid consists of distributed energy resources, DERs(distributed generators - DGs) and di... more The Microgrid consists of distributed energy resources, DERs(distributed generators - DGs) and distributed storages - DSs), loads, PCC, energy management controllers etc., which are required for effective, efficient, reliable and seamless operation of microgrid in both grid connected mode and islanded mode. The heart of the microgrid is the integration part of the DERs with energy management controllers. Out of the methods available, hierarchical method of integrating DERs is selected in this paper. The method is based on the principle of hybrid particle swarm optimization (PSO) which takes into account of genetic algorithm (GA) and PSO. In this paper, the best part of particle to particle information sharing in GA is combined with fast convergence option in PSO, to get the optimum solution with minimum no of iterations. Integration of DERs is nothing but energy management in supply side management (SSM) as well as demand side management (DSM). DSM consists of load shedding or load ...
Elsevier
Modern Microgrid can operate either in grid or islanded mode. In general the Microgrid is in sync... more Modern Microgrid can operate either in grid or islanded mode. In general the Microgrid is in synchronism
with the main grid or utility grid with all its Distributed Generators (DGs), Battery Energy Storage
Systems (BESS) and loads via Static Transfer Switch (STS), thorough Point of Common Coupling (PCC).
This is normal condition. In grid connected mode the controller allows the DGs, to share the load proportionally.
In this condition the DGs and the storage system must supply power to the loads and the excess
power is to be exported to Grid on a pre-determined tariff. When everything is in steady state condition
for any disturbance like a fault on the grid, the Microgrid is to be transferred seamlessly to islanding
mode with an islanding detection method. To achieve this, a Phase Locked Loop (PLL) controller has to
monitor the magnitude of frequency, voltage and phase of the main grid at PCC and give open command
to the Static Transfer Switch within a preset time, before voltage transients are introduced into the
Microgrid. And again in this islanding mode, inverter controlller should adopt P-Q control for load sharing
and also V-f control as the main grid is not available. But re-synchronization back to grid is a planned
program. It has to monitor all the parameters like voltage, frequency and phase angle at PCC, and then
it should be connected back to main grid seamlessly via Synchronizing Controller, through static transfer
switch.
In this paper two DGs are used to test the stability criterion, one is PV and the other is Battery. Rate Of
Change Of Frequency (ROCOF) method of Islanding Detection is used in this paper. An automatic load
shedding technique also used to maintain PCC frequency with segregation of essential and non esssential
loads as a first step in islanded mode to achieve stability. Battery system will be in discharge
mode to maintain voltage of Microgrid in islanding but during grid mode it changes to charging mode
(SOC).