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公开(公告)号：US20210255595A1
公开(公告)日：2021-08-19
申请号：US17306416
申请日：2021-05-03
发明人： Apurva SOMANI , Xiaorong XIA , Gysler CASTELINO , Anup THAPA
IPC分类号： G05B19/042 , H02J7/35 , H02J3/32 , H02J3/38
摘要： A power system for connecting a power source, an energy storage unit and a grid includes a power inverter, an energy storage power converter and a controller. The power inverter is electrically coupled to the power source through a DC bus and converts DC power from the DC bus to AC power output to the grid. The power converter is electrically coupled between the DC bus and the energy storage unit and stores power in the energy storage unit and discharges power from the energy storage unit. The controller controls the power converter to store excess power from the power source that cannot be output to the grid in the energy storage unit, and control the energy storage power converter to discharge power stored in the energy storage unit to the power inverter to output to the grid.
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公开(公告)号：US20210006164A1
公开(公告)日：2021-01-07
申请号：US16934839
申请日：2020-07-21
发明人： Apurva SOMANI , Xiaorong XIA , Anup THAPA , Gysler CASTELINO
摘要： A DC/DC converter system includes a bidirectional DC/DC converter converting between voltage levels at first and second ports and a control system for controlling the DC/DC converter. The bidirectional DC/DC converter includes a first conversion stage connected to the first port and a second conversion stage interfaced with the first conversion stage and connected to the second port. The control system includes outer arid inner control loops. The outer control loop compares a command for one of a voltage level, a current level or power at one of the first and second ports to an actual value of voltage level, current level or power level and outputs an interface current command based on the comparison. The inner control loop compares the interface current command to an actual interface current at an interface of the first and second conversion stages, and controls a switching signal duty value based on the comparison.
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公开(公告)号：US10581266B2
公开(公告)日：2020-03-03
申请号：US15959825
申请日：2018-04-23
发明人： Apurva Somani , Xiaorong Xia , Gysler Castelino
摘要： An energy storage system for direct DC coupling includes a power source electrically connected to a first node, a power converter coupled to the first node, an energy storage unit coupled to the first node through direct DC coupling, and a control system. The power converter controls the output voltage of the power source under the control of the control system. The energy storage unit draws energy from the power source or the bus when charging and supplies energy to the bus when discharging. A main switch is coupled between the first node and the energy storage unit. The control system is configure to control the power converter to adjust the output voltage to the energy storage unit voltage, control the main switch to electrically connect the energy storage unit to the first node, and control the main switch to electrically disconnect the energy storage unit from the first node.
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公开(公告)号：US20190319473A1
公开(公告)日：2019-10-17
申请号：US15959825
申请日：2018-04-23
发明人： Apurva SOMANI , Xiaorong XIA , Gysler CASTELINO
摘要： An energy storage system for direct DC coupling includes a power source electrically connected to a first node, a power converter coupled to the first node, an energy storage unit coupled to the first node through direct DC coupling, and a control system. The power converter controls the output voltage of the power source under the control of the control system. The energy storage unit draws energy from the power source or the bus when charging and supplies energy to the bus when discharging. A main switch is coupled between the first node and the energy storage unit. The control system is configure to control the power converter to adjust the output voltage to the energy storage unit voltage, control the main switch to electrically connect the energy storage unit to the first node, and control the main switch to electrically disconnect the energy storage unit from the first node.
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公开(公告)号：US10340703B2
公开(公告)日：2019-07-02
申请号：US16213317
申请日：2018-12-07
发明人： John C. Palombini , Apurva Somani
摘要： An energy system for renewable energy applications includes a renewable energy source, a bidirectional inverter connected an AC bus and a DC bus, an energy storage unit connected to the bidirectional DC/DC converter, and a control system comprising one or more controllers coupled to the bidirectional inverter and the bidirectional DC/DC converter. The bidirectional inverter is connected to the renewable energy source and a bidirectional DC/DC converter through the DC bus. The system is configured to capture low power of a photovoltaic (PV) array, energy typically lost to inverter clipping, and through the utilization of ramp rate control.
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公开(公告)号：US20190052092A1
公开(公告)日：2019-02-14
申请号：US16103145
申请日：2018-08-14
发明人： John C. PALOMBINI , Apurva SOMANI
摘要： An energy storage system for renewable energy applications includes a renewable energy source, a bidirectional inverter connected an AC bus and a DC bus, an energy storage unit connected to the bidirectional DC/DC converter, and a control system comprising one or more controllers coupled to the bidirectional inverter and the bidirectional DC/DC converter. The bidirectional inverter is connected to the renewable energy source and a bidirectional DC/DC converter through the DC bus. The control system is configured to facilitate the operation of the bidirectional DC/DC converter and the bidirectional inverter. The energy storage system both stores energy from the renewable energy source and a utility grid, and also supplies power to the utility grid. The energy storage system is utilized in a method for supporting frequency regulation of a utility grid and a method for controlling an output power ramp rate for a renewable energy storage system.
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7.发明申请公开(公告)号：US20180331543A1
公开(公告)日：2018-11-15
申请号：US15978585
申请日：2018-05-14
发明人： John C. PALOMBINI , Apurva SOMANI
CPC分类号： H02J3/385 , H02J3/32 , H02J7/0068 , H02J7/35 , H02M3/33584
摘要： An energy system for renewable energy applications includes a renewable energy source, a bidirectional inverter connected an AC bus and a DC bus, an energy storage unit connected to the bidirectional DC/DC converter, and a control system comprising one or more controllers coupled to the bidirectional inverter and the bidirectional DC/DC converter. The bidirectional inverter is connected to the renewable energy source and a bidirectional DC/DC converter through the DC bus. The system is configured to capture low power of a photovoltaic (PV) array, energy typically lost to inverter clipping, and through the utilization of ramp rate control.
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公开(公告)号：US10404072B2
公开(公告)日：2019-09-03
申请号：US16103145
申请日：2018-08-14
发明人： John C. Palombini , Apurva Somani
摘要： An energy storage system for renewable energy applications includes a renewable energy source, a bidirectional inverter connected an AC bus and a DC bus, an energy storage unit connected to the bidirectional DC/DC converter, and a control system comprising one or more controllers coupled to the bidirectional inverter and the bidirectional DC/DC converter. The bidirectional inverter is connected to the renewable energy source and a bidirectional DC/DC converter through the DC bus. The control system is configured to facilitate the operation of the bidirectional DC/DC converter and the bidirectional inverter. The energy storage system both stores energy from the renewable energy source and a utility grid, and also supplies power to the utility grid. The energy storage system is utilized in a method for supporting frequency regulation of a utility grid and a method for controlling an output power ramp rate for a renewable energy storage system.
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9.发明申请公开(公告)号：US20190115760A1
公开(公告)日：2019-04-18
申请号：US16213317
申请日：2018-12-07
发明人： John C. PALOMBINI , Apurva SOMANI
CPC分类号： H02J3/385 , H02J3/32 , H02J7/0068 , H02J7/35 , H02M3/33584
摘要： An energy system for renewable energy applications includes a renewable energy source, a bidirectional inverter connected an AC bus and a DC bus, an energy storage unit connected to the bidirectional DC/DC converter, and a control system comprising one or more controllers coupled to the bidirectional inverter and the bidirectional DC/DC converter. The bidirectional inverter is connected to the renewable energy source and a bidirectional DC/DC converter through the DC bus. The system is configured to capture low power of a photovoltaic (PV) array, energy typically lost to inverter clipping, and through the utilization of ramp rate control.
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公开(公告)号：US10153688B2
公开(公告)日：2018-12-11
申请号：US15803087
申请日：2017-11-03
发明人： Apurva Somani
摘要： A power system and method for performing a blackstart on a microgrid. The power system includes at least a first power converter and a second power converter. The first power converter comprises a first controller having a plurality of startup sequences for performing the blackstart. The second power converter is electrically coupled to the first power converter at a point of common coupling. During the blackstart, the first controller is configured to select and perform one of the plurality of startup sequences according to a point at which the second power converter is within the second power converter's startup sequence during the blackstart. The first controller selects the one of the plurality of startup sequences according to a microgrid voltage at the point of common coupling.
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