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公开(公告)号：US10992257B2
公开(公告)日：2021-04-27
申请号：US15461295
申请日：2017-03-16
Applicant: SolarCity Corporation
Inventor： Sandeep Narla
Abstract: A method of monitoring state of health for an energy generation system includes receiving a measurement of a parameter of an electrical component in the PV energy generation system at an instance in time, referencing a look-up table containing several values of the parameter representing an expected degradation trend across a progression of time for the electrical component, comparing the measurement to an expected value of the expected degradation trend for a period of time corresponding to the instance in time, and initiating a preventative measure based upon the comparison between the measurement and the expected value of the expected degradation trend.
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公开(公告)号：US10305286B2
公开(公告)日：2019-05-28
申请号：US15161104
申请日：2016-05-20
Applicant: SolarCity Corporation
Inventor： Sandeep Narla
IPC: H02J3/00 , H02J3/32 , H02J3/38 , H02J7/00 , H02J7/35 , H02M1/00 , H02M7/00 , H02M7/44 , H02M7/537
Abstract: A power control system includes a first inverter power control system and a second inverter power control system coupled in a parallel configuration with the first inverter power control system. Both first and second inverter power control systems may each include an input configured to receive direct current (DC) power; a DC to alternating current (AC) inverter stage configured to receive the DC power input; an anti-islanding relay coupled to the output of the DC/AC inverter stage; and a transition relay coupled to the anti-islanding relay. The transition relay may be configured to route an output of the inverter power control system between one or more onsite back-up loads and an AC grid. The first inverter power control system may be designated as a master that is configured to control the operation of the second inverter power control system designated as a slave.
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公开(公告)号：US20190135116A1
公开(公告)日：2019-05-09
申请号：US16235967
申请日：2018-12-28
Applicant: SolarCity Corporation
Inventor： Sandeep Narla
Abstract: A system for energy conversion with electric vehicle (EV) charging capability includes a hybrid inverter comprising a DC/DC converter stage for receiving power from a photovoltaic array, a capacitor bank, and a DC-AC inverter coupled to the capacitor bank. The DC-AC inverter includes a battery pack connection for supplying energy to or receiving energy from a battery pack, an AC grid connection for supplying power to or receiving power from an AC grid, a connection for supplying power to a load, and an EV connection for supplying power to or receiving power from an EV battery. The system also includes a controller for generating control signals to control the flow of power within the hybrid inverter, which converts power received from at least one of the photovoltaic array and the battery pack and provides the converted power to charge the EV battery via the EV connection.
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公开(公告)号：US10097005B2
公开(公告)日：2018-10-09
申请号：US14828048
申请日：2015-08-17
Applicant: SolarCity Corporation
Inventor： Sandeep Narla , Alex Mayer , Brett Alten
Abstract: Methods and apparatus for controlling an energy-generation device may be provided. Sockets of the device may be configured to electrically couple to respective energy-generation modules. In some examples, the device may include a connector, memory, and a processor configured to execute instructions for managing the electrical configuration of the sockets.
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5.发明申请公开(公告)号：US20160190798A1
公开(公告)日：2016-06-30
申请号：US14681705
申请日：2015-04-08
Applicant: SolarCity Corporation
Inventor： Sandeep Narla , Alex Mayer , Soren Jensen
Abstract: A solid state circuit for performing rapid shutdown of a photovoltaic power generation system includes a pair of high voltage power transistors connected between a photovoltaic array and a pair of high voltage lines that function to supply power generated by the photovoltaic array to a DC to AC inverter. The solid state circuit further includes a control circuit configured so that when the photovoltaic power generation system operates under normal conditions, the control circuit maintains the pair of high voltage power transistors in the on state so that power produced by the photovoltaic array can be transmitted to the DC to AC inverter through the pair of high voltage lines. The control circuit is further configured so that upon receiving a rapid shutdown command, the control circuit turns off the pair of high voltage power transistors to thereby electrically disconnect the photovoltaic array from the pair of power lines.
Abstract translation: 用于执行光伏发电系统的快速关闭的固态电路包括连接在光伏阵列和一对高压线路之间的一对高压功率晶体管，其功能是将由光伏阵列产生的功率提供给DC至AC逆变器 。 固态电路还包括控制电路，其被配置为使得当光伏发电系统在正常条件下工作时，控制电路将该对高压功率晶体管保持在导通状态，使得由光伏阵列产生的功率可以传输到 直流到交流逆变器通过一对高压线路。 控制电路还被配置为使得在接收到快速关断命令时，控制电路关闭该对高压功率晶体管，从而使光电阵列与一对电力线电连接。
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Patent Agency Ranking
6.发明申请MULTIPLE ENERGY STORAGE DEVICES FOR INVERTER POWER CONTROL SYSTEMS IN AN ENERGY GENERATION SYSTEM 审中-公开能源发电系统逆变电源控制系统的多种能源储存装置公开(公告)号：US20170047741A1
公开(公告)日：2017-02-16
申请号：US15161118
申请日：2016-05-20
Applicant: SolarCity Corporation
Inventor： Sandeep Narla
CPC classification number: H02J3/385 , H02J3/00 , H02J3/32 , H02J3/383 , H02J7/0068 , H02J7/007 , H02J7/35 , H02J2003/388 , H02M7/00 , H02M7/44 , H02M7/537 , H02M2001/0067 , H02M2001/007 , H02M2001/008 , Y02E10/563 , Y02E10/566 , Y02E10/58 , Y02E70/30
Abstract: An energy generation system includes an inverter power control system and a plurality of energy storage devices coupled to the inverter power control system. The inverter power control system includes an input configured to receive DC power; a DC/AC inverter stage configured to receive the DC power input; an anti-islanding relay coupled to the output of the DC/AC inverter stage; and a transition relay coupled to the anti-islanding relay, where the transition relay configured to route an output of the inverter power control system between one or more onsite back-up loads and an AC grid. Each energy storage device is configured to communicate with the inverter power control system.
Abstract translation: 能量生成系统包括逆变器功率控制系统和耦合到逆变器功率控制系统的多个能量存储装置。 逆变器功率控制系统包括被配置为接收直流电力的输入; DC / AC逆变器级，被配置为接收DC电力输入; 耦合到DC / AC逆变器级的输出的防孤岛继电器; 以及耦合到所述防孤岛继电器的转换继电器，其中所述过渡继电器被配置为将所述逆变器功率控制系统的输出路由在一个或多个现场备用负载和AC电网之间。 每个能量存储装置被配置为与逆变器功率控制系统通信。
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7.发明申请公开(公告)号：US20170047740A1
公开(公告)日：2017-02-16
申请号：US15161104
申请日：2016-05-20
Applicant: SolarCity Corporation
Inventor： Sandeep Narla
CPC classification number: H02J3/385 , H02J3/00 , H02J3/32 , H02J3/383 , H02J7/0068 , H02J7/007 , H02J7/35 , H02J2003/388 , H02M7/00 , H02M7/44 , H02M7/537 , H02M2001/0067 , H02M2001/007 , H02M2001/008 , Y02E10/563 , Y02E10/566 , Y02E10/58 , Y02E70/30
Abstract: A power control system includes a first inverter power control system and a second inverter power control system coupled in a parallel configuration with the first inverter power control system. Both first and second inverter power control systems may each include an input configured to receive direct current (DC) power; a DC to alternating current (AC) inverter stage configured to receive the DC power input; an anti-islanding relay coupled to the output of the DC/AC inverter stage; and a transition relay coupled to the anti-islanding relay. The transition relay may be configured to route an output of the inverter power control system between one or more onsite back-up loads and an AC grid. The first inverter power control system may be designated as a master that is configured to control the operation of the second inverter power control system designated as a slave.
Abstract translation: 电力控制系统包括与第一逆变器功率控制系统并联配置的第一逆变器功率控制系统和第二逆变器功率控制系统。 第一和第二逆变器功率控制系统可以各自包括被配置为接收直流（DC）功率的输入; 直流到交流（AC）逆变器级，被配置为接收直流电力输入; 耦合到DC / AC逆变器级的输出的防孤岛继电器; 以及耦合到所述防孤岛继电器的转换继电器。 过渡继电器可以被配置为将逆变器功率控制系统的输出路由在一个或多个现场备用负载和AC电网之间。 第一逆变器功率控制系统可以被指定为被配置为控制被指定为从站的第二逆变器功率控制系统的操作的主站。
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8.发明授权公开(公告)号：US09496710B2
公开(公告)日：2016-11-15
申请号：US14681705
申请日：2015-04-08
Applicant: SolarCity Corporation
Inventor： Sandeep Narla , Alex Mayer , Soren Jensen
Abstract: A solid state circuit for performing rapid shutdown of a photovoltaic power generation system includes a pair of high voltage power transistors connected between a photovoltaic array and a pair of high voltage lines that function to supply power generated by the photovoltaic array to a DC to AC inverter. The solid state circuit further includes a control circuit configured so that when the photovoltaic power generation system operates under normal conditions, the control circuit maintains the pair of high voltage power transistors in the on state so that power produced by the photovoltaic array can be transmitted to the DC to AC inverter through the pair of high voltage lines. The control circuit is further configured so that upon receiving a rapid shutdown command, the control circuit turns off the pair of high voltage power transistors to thereby electrically disconnect the photovoltaic array from the pair of power lines.
Abstract translation: 用于执行光伏发电系统的快速关闭的固态电路包括连接在光伏阵列和一对高压线路之间的一对高压功率晶体管，其功能是将由光伏阵列产生的功率提供给DC至AC逆变器 。 固态电路还包括控制电路，其被配置为使得当光伏发电系统在正常条件下工作时，控制电路将该对高压功率晶体管保持在导通状态，使得由光伏阵列产生的功率可以传输到 直流到交流逆变器通过一对高压线路。 控制电路还被配置为使得在接收到快速关断命令时，控制电路关闭该对高压功率晶体管，从而使光电阵列与一对电力线电连接。
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公开(公告)号：US20160308365A1
公开(公告)日：2016-10-20
申请号：US15089431
申请日：2016-04-01
Applicant: SolarCity Corporation
Inventor： Alex Mayer , Sandeep Narla
CPC classification number: H02J3/383 , G01R19/16566 , H02M1/10 , H02M3/04 , H02M7/44 , H02M2001/0009 , Y02E10/563
Abstract: An indicator device includes a housing configured to be coupled to positive and negative DC wire lines that supply power from an energy generation source to an inverter. The indicator device further includes a current sensor for measuring a current level on the positive and negative DC wire lines, and voltage sensors for measuring a first voltage across the positive and negative DC wire lines, a second voltage across the positive DC wire line and a ground terminal, and a third voltage across the negative DC wireline and the ground terminal. A circuit block compares the measured current level to one or more threshold current levels, and further compares the measured first, second and third voltages to one or more threshold voltage levels, and in response provides an output signal. A visual indicator receives the output signal from the circuit block, and in response provides a visual indication of whether voltage and current levels on the positive and negative DC wire lines are at levels that may harm humans.
Abstract translation: 指示器装置包括壳体，该壳体被配置为耦合到从能量发生源向逆变器供电的正和负的直流有线线路。 指示装置还包括用于测量正和负DC线路上的电流电平的电流传感器，以及用于测量正和负DC线路两端的第一电压的电压传感器，正直流有线线路上的第二电压和 接地端子和负DC电缆和接地端子之间的第三电压。 电路块将测量的电流电平与一个或多个阈值电流电平进行比较，并且还将测量的第一，第二和第三电压与一个或多个阈值电压电平进行比较，并且作为响应提供输出信号。 视觉指示器接收来自电路块的输出信号，并且作为响应提供对正和负DC线路上的电压和电流水平是否处于可能危害人的水平的视觉指示。
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公开(公告)号：US10424933B2
公开(公告)日：2019-09-24
申请号：US15281039
申请日：2016-09-29
Applicant: SolarCity Corporation
Inventor： Sandeep Narla , Andrew Russell Lutkus
IPC: H02J3/38 , H01L31/042 , H02S10/20 , H02S40/30 , H02J3/28
Abstract: Embodiments disclose solar energy generation systems with automatic smart transfer switches. An energy generation system includes an array of PV modules, a PV inverter coupled to the array of PV modules, and a battery pack configured to store DC power from the PV modules and output the stored DC power. The energy generation system can further include a storage inverter/hybrid inverter PCS coupled to the battery pack, and an automatic smart transfer switch configured to select between an AC grid and the storage inverter/hybrid inverter PCS for outputting to a main electrical panel, where the automatic smart transfer switch is configured so that in a first position, the AC grid is coupled to the main electrical panel, and in a second position, both the storage inverter is coupled to the main electrical panel.
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