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1.发明授权公开(公告)号：US11594951B2
公开(公告)日：2023-02-28
申请号：US17348708
申请日：2021-06-15
申请人： Enphase Energy, Inc.
摘要： A method and apparatus for autonomous rapid shut-down of a power conditioner. In one embodiment, the method comprises determining an amount of active and reactive current generated by a power conditioner; determining whether the amount of active and reactive current satisfies an open circuit threshold; and initiating, when the amount of active and reactive current satisfies the open circuit threshold, deactivation of the power conditioner.
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2.发明授权公开(公告)号：US11355936B2
公开(公告)日：2022-06-07
申请号：US17201934
申请日：2021-03-15
申请人： Enphase Energy, Inc.
摘要： A method and apparatus for power converter current control. In one embodiment, the method comprises controlling an instantaneous current generated by a power converter such that that power converter appears, from the perspective of an AC line coupled to the power converter, as a virtual AC voltage source in series with a virtual impedance.
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公开(公告)号：US11289910B2
公开(公告)日：2022-03-29
申请号：US16920872
申请日：2020-07-06
申请人： Enphase Energy, Inc.
摘要： A method and apparatus for setting an impedance of a power conditioning unit (PCU). In one embodiment, the method comprises applying a disturbance to a virtual AC voltage produced by a power conditioning unit (PCU) that is coupled to a power grid, where the disturbance has a first phase; measuring a second phase of the applied disturbance on the power grid; comparing the second phase of the applied disturbance to the first phase of the disturbance; and adjusting, when the second phase differs from the first phase by more than a threshold amount, an impedance of the PCU.
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公开(公告)号：US11073807B2
公开(公告)日：2021-07-27
申请号：US16859994
申请日：2020-04-27
申请人： Enphase Energy, Inc.
摘要： Method and apparatus for controlling power conditioners in a distributed resource island. In one embodiment, the method comprises comparing, at a power conditioner operating in a de-energized state, an input of the power conditioner to an input threshold, wherein the power conditioner is coupled to an islanded grid; operating the power conditioner, when the input exceeds the input threshold, in a soft-grid mode to generate a touch-safe AC voltage that is coupled to the islanded grid; and activating the power conditioner, based on an impedance of the islanded grid and load demand for the power conditioner, to operate proximate its nominal output voltage.
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公开(公告)号：US11031794B2
公开(公告)日：2021-06-08
申请号：US16702530
申请日：2019-12-03
申请人： Enphase Energy, Inc.
摘要： A system and apparatus for autonomous charge balancing of an energy storage device of the microgrid. In one embodiment the apparatus comprises a power conditioner, coupled to the energy storage device, comprising a droop control module for operating the power conditioner, during an autonomous mode of operation, such that the state of charge of the energy storage device is autonomously driven toward the state of charge of at least one other energy storage device of the microgrid.
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6.发明申请公开(公告)号：US20210126467A1
公开(公告)日：2021-04-29
申请号：US17083226
申请日：2020-10-28
申请人： Enphase Energy Inc.
IPC分类号： H02J3/38 , H02H9/02 , H02H3/06 , H02J3/00 , H02H3/08 , H02H7/26 , G05F1/66 , G06Q50/06 , G06Q10/06
摘要： A method and apparatus for tertiary control with over-current protection. In one embodiment, the method comprises calculating at least one unconstrained optimal net intertie target for an area of a power network; calculating, for each resource within the area, optimal scheduled current to achieve the at least one unconstrained optimal net intertie target; calculating, using the optimal scheduled currents and a plurality of stress coefficients, net scheduled current for each power line segment within the area; comparing the net scheduled currents to corresponding stress thresholds to identify any stress violations; reducing, when the comparing step identifies one or more stress violations, the optimal scheduled current for one or more resources contributing to the one or more stress violations; and calculating, when the comparing step identifies the one or more stress violations, updated optimal scheduled current for one or more resources not contributing to the one or more stress violations.
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7.发明授权公开(公告)号：US10516270B2
公开(公告)日：2019-12-24
申请号：US15398110
申请日：2017-01-04
申请人： Enphase Energy, Inc.
摘要： A method and apparatus for autonomously operating a microgrid power generator. In one embodiment, the method comprises obtaining a first measurement of at least one grid parameter of a microgrid transmission line coupled to a power generator in a microgrid; comparing the first measurement to a turn-on threshold; initiating, when the first measurement is less than the turn-on threshold, power generation by the power generator; obtaining, after initiation of the energy generation, a second measurement of the at least one grid parameter of the microgrid transmission line; comparing the second measurement to a shut-down threshold that is greater than the turn-on threshold; and stopping, when the second measurement exceeds the shut-down threshold, the power generation by the power generator.
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公开(公告)号：US10511178B2
公开(公告)日：2019-12-17
申请号：US15369876
申请日：2016-12-05
申请人： Enphase Energy, Inc.
摘要： A system and apparatus for autonomous charge balancing of an energy storage device of the microgrid. In one embodiment the apparatus comprises the energy storage device; and a power conditioner, coupled to the energy storage device, comprising a droop control module for operating the power conditioner, during an autonomous mode of operation, such that the state of charge of the energy storage device is autonomously driven toward the state of charge of at least one other energy storage device of the microgrid.
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公开(公告)号：US10126721B2
公开(公告)日：2018-11-13
申请号：US15047337
申请日：2016-02-18
申请人： Enphase Energy, Inc.
摘要： Methods and apparatus for controlling power conditioners in a distributed resource island are provided herein. In one embodiment, an input of a power conditioner that is operating in a de-energized state and coupled to an islanded grid is compared to an input threshold. When the input exceeds the input threshold, the power conditioner is operated in a soft-grid mode to generate a touch-safe AC voltage that is coupled to the islanded grid. The power conditioner compares an impedance of the islanded grid to a grid impedance range and compares load demand of the power conditioner to an activate threshold; when the impedance is within the grid impedance range and the load demand exceeds the activate threshold, the power conditioner is activated to operate proximate its nominal output voltage.
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10.发明申请METHOD AND APPARATUS FOR IMPEDANCE MATCHING IN VIRTUAL IMPEDANCE DROOP CONTROLLED POWER CONDITIONING UNITS 审中-公开虚拟阻抗控制功率调节单元中阻抗匹配的方法与装置公开(公告)号：US20170077707A1
公开(公告)日：2017-03-16
申请号：US15262089
申请日：2016-09-12
申请人： Enphase Energy, Inc.
摘要： A method and apparatus for setting a virtual impedance ratio of a power conditioning unit (PCU). In one embodiment, the method comprises applying a disturbance to a virtual AC voltage of a power conditioning unit (PCU) operating in a virtual impedance droop control mode in which the PCU appears, from the perspective of a power grid coupled to the PCU, as a virtual AC voltage source in series with a virtual impedance; measuring the phase of the applied disturbance on the power grid; comparing the measured phase of the applied disturbance on the power grid to the phase of the disturbance; and adjusting, when the measured phase of the applied disturbance on the power grid differs from the phase of the disturbance by more than a threshold amount, a ratio of a resistive impedance of the virtual impedance to an inductive impedance of the virtual impedance.
摘要翻译： 一种用于设置功率调节单元（PCU）的虚拟阻抗比的方法和装置。 在一个实施例中，该方法包括：从耦合到PCU的电网的角度，以PCU出现的虚拟阻抗下降控制模式中操作的功率调节单元（PCU）的虚拟AC电压施加干扰，如 与虚拟阻抗串联的虚拟AC电压源; 测量电网施加扰动的相位; 将电网上施加的扰动的测量相位与扰动的相位进行比较; 并且当电力网上所施加的扰动的测量相位与干扰相位差超过阈值时，调整虚拟阻抗的电阻阻抗与虚拟阻抗的电感阻抗的比值。
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