Bloom Energy Corporation

American Power Conversion Corporation

Powersecure, Inc.

Ranganathan Gurunathan

Arne Watson Ballantine

Prasad Pmsvvsv

Ramesh Srinivasan

Chad Pearson

Rajesh Gopinath

Vishal Anand Gopalakrishnan

Carl Cottuli

Ian Russell

Peter Light

Deepak Balakrishnan

Stuart Aaron

Anilkumar Vishnuvarjula

Saravanakumar Narayanasamy

James F McElroy

Chockkalingam Karuppaiah

Abhishek Dudhmande

Rajaram Swaminathan

Rakesh Kumar Roy

Karthick Sudhan S

Bhavana Ganesh

Tad Armstrong

Damir Klikic

Henning Roar Nielsen

K R Sridhar

Scott Reynolds

Marshall Worth

Arne Ballatine

Muralidhara Ramakrishna Shyamavadhani

Alberto Doronzo

Josh Richman

Pavana Kumar

Pothapragada Pavana Kumar

Badrinarayanan Thiruvengadaswamy

Robert Harris

Matthias Gottmann

Harald Herchen

David Weingaertner

Swaminathan Venkataraman

Michael Gasda

Jessica Mahler

David Trevisan

Gilbert Richards

Ross Parker

James Smith

Navaneetha Krishnan

Kr Sridhar

Peter Gross

Tyler Dawson

Zachary Odenheimer

Jayanth Moodliar

William Thayer

Mehdi Ebad

Chaitanya Mandela

Rajkannu Govindan

Badri Narayanan

Aisur Gopalakrishnan Vishal Anand

Ame Ballantine

Kodali Venkata Narasimha Rao

Saravana Kumar

Vishal Anand

Srinivasan Vijay Sarathy

Rajan Surve

Saravana Narayanasamy

A power generation system includes a power source that is configured to communicate with at least one of a downstream load or a downstream device by changing a voltage on a power bus between the power source and the at least one of the downstream load or the downstream device, while power source provides power on the power bus to the at least one of the downstream load or the downstream device.

Power source communication with downstream device by changing output voltage on a power bus

Systems, methods, and devices of the various embodiments provide a hardware and software architecture enabling electrochemical impedance spectroscopy ('EIS') to be performed on multiple electrochemical devices, such as fuel cells, at the same time without human interaction with the electrochemical devices and to use EIS to dynamically monitor the performance of a fuel cell system. Embodiment methods may include determining an impedance of a set of fuel cells using electrochemical impedance spectroscopy, determining an ohmic polarization of the set of fuel cells from the impedance, determining a concentration polarization of the set of fuel cells from the impedance, comparing the ohmic polarization of the set of fuel cells to a first threshold, comparing the concentration polarization of the set of fuel cells to a second threshold, and initiating a corrective action when the ohmic polarization is above the first threshold or when the concentration polarization is below the second threshold.

Electrochemical impedance spectroscopy ('EIS') analyzer and method of using thereof

A microgrid includes a power system configured to output system power and an automatic transfer switch (ATS). The ATS includes a normal terminal that is electrically connected to a grid power line configured to receive grid power from a power utility, an emergency terminal that is electrically connected to a system power line configured to receive system power from the power system, and a load terminal that is electrically connected to a critical load line configured to provide power to a critical load. The microgrid also includes a bypass line electrically connected to the system power line and the critical load line, so as to bypass the ATS, and a circuit breaker configured to control power flow through the bypass line.

Microgrid including dual mode microgrid inverter and load management method

A fuel cell system column includes a first terminal plate connected to a first electrical output of the column, a second terminal plate connected to a second electrical output of the column, at least one first fuel cell stack located in a middle portion of the column between the first terminal plate and the second terminal plate, and at least one electrical connection which is electrically connected to the middle portion of the column and which is configured to provide a more uniform fuel utilization across the first column.

Fuel cell system with electrical control of fuel utilization and method of operating thereof

Various embodiments include methods and systems for implementing managing a microgrid system. The system may include a plurality of power module clusters, a plurality of uninterruptable power modules, a plurality of bidirectional direct current (DC)/DC converters, and a DC power bus. Each one of the power module clusters of the plurality of power module clusters may be electrically connected in parallel to an uninterruptable power module of the plurality of uninterruptable power modules and a first end of a bidirectional DC/DC converter of the plurality bidirectional DC/DC converters, and a second end of each one of the bidirectional DC/DC converters of the plurality of bidirectional DC/DC converters may be electrically connected to the DC power bus. In some embodiments, the plurality of bidirectional DC/DC converters may be electrically connected to in parallel by the DC power bus or in series via a DC power bus ring.

Microgrid with power equalizer bus and method of operating same

A system and method of provided power to one or more electrical loads of an electrical load module is provided. The electrical load module includes an alternating current (AC) power input port, a direct current (DC) power input port, a power distribution device, a first power supply device, a second power supply device, and a first electrical load component. The power distribution device is electrically coupled to the AC power input port via a first connector and the DC power input port via a second connection. The first electrical load component is coupled to the first power supply device and the second power supply device. The first power supply device and the second power supply device are configured to provide power to the first electrical load component and a feed from an alternative power source system is directly connected to the DC power input port of the electrical load module.

Power system integrated with dual power electrical load

A method includes selecting a test waveform to inject from a first DC converter to at least one first DC power source other than a fuel cell, determining a first resulting ripple that will be generated in response to injecting the test waveform onto the battery, determining at least one offset waveform to inject from at least one second DC converter to at least one second DC power source to generate one or more second ripples which cancel the first resulting ripple, injecting the test waveform from the first DC converter to the at least one first DC power source, injecting the at least one offset waveform from the at least one second DC converter to the at least one second DC power source, and determining a characteristic of the first DC power source based at least in part on the impedance response of the first DC power source.

System and method for impedance testing DC power sources

Systems and methods are provided for creating and operating a Direct Current (DC) micro-grid. A DC micro-grid may include power generators, energy storage devices, and loads coupled to a common DC bus. Power electronics devices may couple the power generators, energy storage devices, and loads to the common DC bus and provide power transfer.

Storage system controller

A method includes selecting a test waveform to inject to a battery from a first DC converter, determining a first resulting ripple that will be generated in response to injecting the test waveform, determining at least one offset waveform to inject to at least one second DC power source from at least one second DC converter such that one or more second ripples will be provided that will cancel the first resulting ripple if the battery is charging, injecting the test waveform to the battery, injecting the at least one offset waveform to the at least one second DC power source, determining if the first resulting ripple has been cancelled, and determining if the battery is charging or discharging based on the step of determining if the first resulting ripple has been cancelled.

A method of controlling an inverter having a three phase output and a plurality of single phase loads connected to respective one of the three phases of the three phase output includes determining if a first phase of the three phase output has a heavier load than a second phase of the three phase output, and providing a higher output power from the inverter to the first phase than to the second phase if it is determined that the first phase has a heavier load than the second phase.

Methods of advanced grid and microgrid support functionalities through hybrid fuel cell systems

An electrical power system, including a fuel cell system having a plurality of fuel cell segments and an energy storage system electrically coupled to the fuel cell system. The energy storage system including a plurality of energy storage system technologies, an energy storage system direct current (DC) bus configured to electrically connect the plurality of energy storage system technologies to the fuel cell system, and an energy storage system technologies management system configured manage impedance of the energy storage system and electric coupling of the energy storage system and the fuel cell system.

Intergrated fuel cell and energy storage systems and method of operating thereof

A method and apparatus for parallel operation of multiple power sources including one fuel cell power source. The apparatus includes a droop controller master communicatively connected to the multiple power sources and configured to measure a load demand for the multiple power sources, a first droop controller slave communicatively connected to the droop controller master and to a first fuel cell power source, the first droop controller configured to calculate a first droop profile for the first fuel cell power source, a second droop controller slave communicatively connected to the droop controller master and to a second power source, and a first inverter, electrically connected to the first fuel cell power source and communicatively connected to the first droop controller slave, and configured to output power according to a first droop profile.

Advanced uninterruptable power module controller and method of operating same

A fuel cell system includes grid independent operation with DC microgrid capability. This fuel cell system has a capability of operation with and without the grid, and with DC micro-grid capability.

Fuel cell system with grid independent operation and DC microgrid capability

Growing community of inventors

Bengaluru, India

Ranganathan Gurunathan