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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：US11936187B2
公开(公告)日：2024-03-19
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： H02J3/32 , G05B19/042 , H02J3/38 , H02J3/46 , H02J7/35
CPC分类号： H02J3/32 , G05B19/042 , H02J3/38 , H02J3/381 , H02J3/46 , H02J7/35 , G05B2219/2639 , H02J2300/24 , H02J2300/26
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：US10749435B2
公开(公告)日：2020-08-18
申请号：US15895565
申请日：2018-02-13
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 and 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：US11757361B2
公开(公告)日：2023-09-12
申请号：US16934839
申请日：2020-07-21
发明人： Apurva Somani , Xiaorong Xia , Anup Thapa , Gysler Castelino
CPC分类号： H02M3/1582 , G05B19/05 , H02J7/0071 , H02J7/35 , H02M1/08 , H02M1/14 , H02M3/33584 , G05B2219/13095 , H02J7/0068 , H02M1/0009 , H02M1/0054
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 and 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：US10996644B2
公开(公告)日：2021-05-04
申请号：US15980224
申请日：2018-05-15
发明人： Apurva Somani , Xiaorong Xia , Gysler Castelino , Anup Thapa
IPC分类号： G05B19/042 , H02J3/38 , H02J7/35 , H02J3/32
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：US20180331625A1
公开(公告)日：2018-11-15
申请号：US15895565
申请日：2018-02-13
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 and 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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