ABSTRACT Transmission grids worldwide are presently facing challenges in integrating large scale ... more ABSTRACT Transmission grids worldwide are presently facing challenges in integrating large scale renewable systems due to their limited power transmission capacity. This paper presents a novel circuit topology and control for grid connected micro-inverters suitable for solar AC modules. This topology is based on the single-stage DC to AC conversion approach. The circuit has an L-C series resonant converter, a high frequency transformer and a line frequency unfolder. Design and control considerations are presented along with the detailed design of resonant components. The circuit components and controls have been optimized to achieve very high efficiency at various load and input conditions. A controller has been designed and simulated using a Simulink® numeric package. An experimental prototype was designed to achieve a high California Energy Commission (CEC) efficiency rating.
... Creator/Author, Enslin, Johan (Petra Solar, Inc., South Plainfield, NJ) ; Hamaoui, Ronald (Pe... more ... Creator/Author, Enslin, Johan (Petra Solar, Inc., South Plainfield, NJ) ; Hamaoui, Ronald (Petra Solar, Inc., South Plainfield, NJ) ; Gonzalez ... Rustom, Khalid (Petra Solar, Inc., South Plainfield, NJ) ; Stuby, Rick (Petra Solar, Inc., South Plainfield, NJ) ; Kuran, Mohammad (Petra Solar ...
Sustainable Development and Environmental Management, 2008
ABSTRACT The Hydrogen Economy concept is a controversial and hot topic of the day. Hybrid network... more ABSTRACT The Hydrogen Economy concept is a controversial and hot topic of the day. Hybrid networks, including electrical, gas and hydrogen have however a bright future. The role of power electronics as the interface between these different networks is the key technology since distributed power resources are normally connected to these different networks through a power electronic converter. These power electronic interconnections bring certainly new challenges to network operators, distributed power and power electronic manufacturers. Due to the distributed and fluctuating nature of these distributed resources, they are implemented in large numbers onto the same, sometimes remote, distribution network. These challenges include power quality issues, network stability, power balancing considerations, voltage regulation, protection protocols and unwanted islanding considerations. This paper highlights some of these issues and the role power electronics can play to make this transition between a vertically integrated energy society to a more distributed and hybrid nature.
The grid faces a number of challenges related to large-scale integration of intermittent distribu... more The grid faces a number of challenges related to large-scale integration of intermittent distributed generation (DG) such as photovoltaics (PV). Power quality challenges include voltage regulation issues, flicker, and frequency volatility. Operational challenges include the need for extension of the command-and-control infrastructure to millions of devices anticipated on the low-voltage (service) side of the distribution network. This paper presents an
PESC Record. 27th Annual IEEE Power Electronics Specialists Conference, 2000
Numerous resonant soft-switching inverter topologies have been introduced. This paper offers a cl... more Numerous resonant soft-switching inverter topologies have been introduced. This paper offers a clearly arranged survey of control and sensing complexity, application ranges and device requirements related to several promising topologies. By presenting implementation details and experimental results on two representative inverter types, typical control issues and problems of resonant link and resonant pole inverters are illustrated
APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition, 1998
This paper proposes the combination of a fuzzy controller with a conventional system protection c... more This paper proposes the combination of a fuzzy controller with a conventional system protection controller to give the system a measure of ride-through capability. The fuzzy controller forms a layer of protection between the normal operating range and the conventional protection scheme offering greater system robustness.
ABSTRACT Transmission grids worldwide are presently facing challenges in integrating large scale ... more ABSTRACT Transmission grids worldwide are presently facing challenges in integrating large scale renewable systems due to their limited power transmission capacity. This paper presents a novel circuit topology and control for grid connected micro-inverters suitable for solar AC modules. This topology is based on the single-stage DC to AC conversion approach. The circuit has an L-C series resonant converter, a high frequency transformer and a line frequency unfolder. Design and control considerations are presented along with the detailed design of resonant components. The circuit components and controls have been optimized to achieve very high efficiency at various load and input conditions. A controller has been designed and simulated using a Simulink® numeric package. An experimental prototype was designed to achieve a high California Energy Commission (CEC) efficiency rating.
... Creator/Author, Enslin, Johan (Petra Solar, Inc., South Plainfield, NJ) ; Hamaoui, Ronald (Pe... more ... Creator/Author, Enslin, Johan (Petra Solar, Inc., South Plainfield, NJ) ; Hamaoui, Ronald (Petra Solar, Inc., South Plainfield, NJ) ; Gonzalez ... Rustom, Khalid (Petra Solar, Inc., South Plainfield, NJ) ; Stuby, Rick (Petra Solar, Inc., South Plainfield, NJ) ; Kuran, Mohammad (Petra Solar ...
Sustainable Development and Environmental Management, 2008
ABSTRACT The Hydrogen Economy concept is a controversial and hot topic of the day. Hybrid network... more ABSTRACT The Hydrogen Economy concept is a controversial and hot topic of the day. Hybrid networks, including electrical, gas and hydrogen have however a bright future. The role of power electronics as the interface between these different networks is the key technology since distributed power resources are normally connected to these different networks through a power electronic converter. These power electronic interconnections bring certainly new challenges to network operators, distributed power and power electronic manufacturers. Due to the distributed and fluctuating nature of these distributed resources, they are implemented in large numbers onto the same, sometimes remote, distribution network. These challenges include power quality issues, network stability, power balancing considerations, voltage regulation, protection protocols and unwanted islanding considerations. This paper highlights some of these issues and the role power electronics can play to make this transition between a vertically integrated energy society to a more distributed and hybrid nature.
The grid faces a number of challenges related to large-scale integration of intermittent distribu... more The grid faces a number of challenges related to large-scale integration of intermittent distributed generation (DG) such as photovoltaics (PV). Power quality challenges include voltage regulation issues, flicker, and frequency volatility. Operational challenges include the need for extension of the command-and-control infrastructure to millions of devices anticipated on the low-voltage (service) side of the distribution network. This paper presents an
PESC Record. 27th Annual IEEE Power Electronics Specialists Conference, 2000
Numerous resonant soft-switching inverter topologies have been introduced. This paper offers a cl... more Numerous resonant soft-switching inverter topologies have been introduced. This paper offers a clearly arranged survey of control and sensing complexity, application ranges and device requirements related to several promising topologies. By presenting implementation details and experimental results on two representative inverter types, typical control issues and problems of resonant link and resonant pole inverters are illustrated
APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition, 1998
This paper proposes the combination of a fuzzy controller with a conventional system protection c... more This paper proposes the combination of a fuzzy controller with a conventional system protection controller to give the system a measure of ride-through capability. The fuzzy controller forms a layer of protection between the normal operating range and the conventional protection scheme offering greater system robustness.
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Papers by J. Enslin