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1. 发明申请

US20230134016A1 MEDIUM-VOLTAGE PHOTOVOLTAIC GRID-CONNECTED INVERTER SYSTEM AND PHOTOVOLTAIC POWER GENERATION SYSTEM 有权
公开(公告)号：US20230134016A1
公开(公告)日：2023-05-04
申请号：US17915411
申请日：2021-09-17
申请人： Sungrow Power Supply Co., Ltd.
发明人： Hang Wang , LI Ren , Peng Sun
IPC分类号： H02H7/122 , H02M7/537 , H02J3/00 , H02J3/38
摘要： A medium-voltage grid-connected photovoltaic inverter system includes: a photovoltaic inverter, a medium-voltage transformer, a medium-voltage switch, and an inverter grid-connected controller. A direct current input terminal of the photovoltaic inverter is connected to a direct current bus. A low-voltage side of the medium-voltage transformer is connected to an alternating current output terminal of the photovoltaic inverter. An input terminal of the medium-voltage switch is connected to a high-voltage side of the medium-voltage transformer, and an output terminal of the medium-voltage switch is configured to be connected to a medium-voltage grid. A current sensor is integrated in the medium-voltage switch to detect a grid-connected current of the photovoltaic inverter system and output a current detection signal.

2. 发明申请

US20230094418A1 SELF-TEST LEAKAGE PROTECTOR WITH TIMING FUNCTION AND ELECTRIC EQUIPMENT 有权
公开(公告)号：US20230094418A1
公开(公告)日：2023-03-30
申请号：US17439191
申请日：2021-05-14
申请人： ZHEJIANG ZHONGXUN ELECTRONICS CO., LTD.
发明人： Jianzhong ZHENG , Guohong LUO
IPC分类号： H02H7/122
摘要： The present invention discloses a self-test leakage protector with a timing function, comprising a leakage protection module, a timer module, a DC power supply module, and a DC power supply module control switch, wherein the DC power supply module control switch is connected between the DC power supply module and the leakage protection module, or between input AC power and the DC power supply module that supplies power to the leakage protection module, and is in an off state under a standby condition; according to a timing function requirement, the timer sends a signal of turning off or turning on the DC control switch; and when the turning-on signal is sent, the switch is closed, such that the leakage protection module is powered on for power-on reset, followed by a self-test of a leakage function, and if the self-test is passed, power is supplied to a load, and the self-test is carried out every time before power is supplied to the load. In the invention, the timing function of the timer is integrated in the self-test leakage protector capable of self testing, so the leakage protector is a separate product having a timing function with high safety, low standby power consumption and a low cost.

3. 发明授权

US11569758B2 Control system with delayed protection for a three-level inverter 有权
公开(公告)号：US11569758B2
公开(公告)日：2023-01-31
申请号：US17340645
申请日：2021-06-07
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Longgi Li , Wanling Zhang
IPC分类号： H02H3/027 , H02M7/537 , H02M7/487 , H02H3/02 , H02H3/033 , H02H7/122
摘要： A microcontroller unit for controlling a three-level inverter including delayed fault protection is provided. The microcontroller unit includes an input port configured to receive a trip signal from a fault detection module, and a plurality of EPWM modules, each configured to control a power switch within the three-level inverter. The microcontroller unit includes an auxiliary EPWM module configured to receive the trip signal and produce a delayed trip signal, and processing circuitry coupled with the input port, the plurality of EPWM modules, and the auxiliary EPWM module. The processing circuitry is configured to, in response to activation of the trip signal, direct one of the plurality of EPWM modules to shut off its corresponding power switch upon activation of the trip signal, and to direct a different one of the plurality of EPWM modules to shut off its corresponding power switch upon activation of the delayed trip signal.

4. 发明授权

US11527966B2 Power conversion apparatus that judges system power failure based on system frequency and voltage 有权
公开(公告)号：US11527966B2
公开(公告)日：2022-12-13
申请号：US17073605
申请日：2020-10-19
申请人： KABUSHIKI KAISHA TOSHIBA , Toshiba Infrastructure Systems & Solutions Corporation
发明人： Yuusuke Kouno , Yoichi Morishima
IPC分类号： H02J3/42 , H02M7/537 , H02H7/122 , H02H3/353 , G01R23/15 , G01R19/25 , G01R19/165 , H02M1/00
摘要： An apparatus according to an embodiment includes a control circuit to control operations of an inverter and a switch. The control circuit judges whether or not a power system has a power failure, based on values of the system voltage and a frequency of the power system; and calculates a phase difference between a phase of the output voltage of the inverter and a phase of the system voltage and generate, by means of the phase difference, an output frequency pattern for changing a frequency of the output voltage of the inverter. The control circuit, when it is judged that the power system has recovered from the power failure, controls the inverter to change the frequency of the output voltage of the inverter in line with the output frequency pattern, and closes the switch after the phase difference becomes smaller than or equal to a threshold.

5. 发明授权

US11444545B2 Multiple stage gate drive for cascode current sensing 有权
公开(公告)号：US11444545B2
公开(公告)日：2022-09-13
申请号：US17146521
申请日：2021-01-12
申请人： Power Integrations, Inc.
发明人： Rajko Duvnjak
IPC分类号： H02M7/162 , H02M7/12 , H02H7/122 , H02M1/32 , H02M1/12 , H02M1/44 , H02M3/335 , H03K17/082 , H03K17/10 , H03K17/16 , H03K17/687 , H02H1/00 , G01R19/00 , H02M1/00
摘要： A power converter comprising an energy transfer element is coupled between an input of the power converter and an output of the power converter. A cascode circuit generates a first sense signal and a second sense signal. A controller controls the switching of the cascode circuit to transfer energy from the input of the power converter to the output of the power converter. The controller comprising a current sense circuit generates a current limit signal and an overcurrent signal in response to the first sense signal and the second sense signal. A control circuit generates a control signal in response to the current limit signal and the overcurrent signal. A drive circuit comprising a first stage gate drive circuit generates a drive signal in response to the control signal to reduce EMI, and a second stage of gate drive circuit to enable accurate current sensing of the cascode circuit.

6. 发明申请

US20220094197A1 METHOD FOR CONTROLLING AN UNINTERRUPTABLE POWER SUPPLY 有权
公开(公告)号：US20220094197A1
公开(公告)日：2022-03-24
申请号：US17480450
申请日：2021-09-21
申请人： ABB Schweiz AG
发明人： Silvio Colombi , Andrea Mannuccini
IPC分类号： H02J9/06 , H02J3/46 , H02M7/493 , H02J3/36 , H02H7/122 , H02M7/08
摘要： The disclosure relates to a method for controlling an uninterruptable power supply and a respective computer program. The uninterruptable power supply comprises a grid connection, a grid switch connected to the grid connection, a rectifier and an inverter interconnected via a DC link, an energy storage connected to the DC link, a load connection, to which the inverter is connected, and a bypass switch, which is connected in parallel to the rectifier, the DC link and the inverter between the grid switch and the load connection, wherein the grid switch is a mechanical switch and the bypass switch is a semiconductor switch.

7. 发明授权

US11228171B2 Overcurrent trip coordination between inverter and circuit breakers 有权
公开(公告)号：US11228171B2
公开(公告)日：2022-01-18
申请号：US15676775
申请日：2017-08-14
申请人： Koolbridge Solar, Inc.
发明人： Paul Wilkinson Dent
IPC分类号： H02H7/122 , H02M7/5387 , H02J3/04 , H02J3/38 , H02M1/36 , H02M1/32 , H02J7/35 , H02H7/26 , H02J9/06 , H02J3/32 , H02H3/02 , H02H3/06
摘要： An electrical installation having a first source of power, such as the utility grid, and a second source of power from an electronic DC-to-AC converter, comprises a smart load center for selecting the source of power independently for each of a number of branch circuits protected by circuit breakers to be the first source or the second source. The smart load center comprises a software-controlled processor for operating the transfer relays that select the first or second source of power for each branch circuit. In the event that a current overload on a branch circuit connected to the DC-to-AC converter causes it to trip before the branch circuit breaker clears the overload, all circuits are transferred to the first power source to trip the fault breaker and then the microprocessor enters a restart sequence to verify that the fault is cleared or else to take other action.

8. 发明申请

US20220014015A1 ABNORMALITY DETECTING SYSTEM FOR A SOLAR POWER GRID 有权
公开(公告)号：US20220014015A1
公开(公告)日：2022-01-13
申请号：US17366324
申请日：2021-07-02
申请人： LIXMA TECH CO., LTD.
发明人： CHUN-CHI HSU
IPC分类号： H02H7/122 , H02S40/32 , H02S50/10
摘要： A system is provided to be disposed between a solar power module and a power inverter. The solar power module outputs a solar power signal to the power inverter. The system includes a circuit protecting unit and a processor. The processor obtains an amount of electrical current outputted by the power inverter and an amount of electrical current flowing through a current detector of the circuit protecting unit. When it is determined that the amount of electrical current outputted by the power inverter is zero and the amount of the electrical current flowing through the current detector is non-zero, the processor controls a power switch of the circuit protecting unit to switch to an open circuit state.

9. 发明申请

US20220014013A1 Power Electronic Converter with a Ground Fault Detection Unit that Shares a Common Ground with both DC Ports and AC Ports 有权
公开(公告)号：US20220014013A1
公开(公告)日：2022-01-13
申请号：US17134019
申请日：2020-12-24
申请人： Qingchang Zhong
发明人： Qingchang Zhong
IPC分类号： H02H7/122 , H02M1/00 , G01R31/52
摘要： This invention discloses a power electronic converter that streamlines the detection, monitoring, and protection of ground faults. The converter has at least one DC leg with each having a DC port and a first DC bus, at least one AC leg with each having an AC port and a second DC bus, at least one DC-bus capacitor, a ground-fault detection unit, and a Protective Earth terminal that is connected to the earth. The DC port(s). AC port(s), and the ground-fault detection unit are connected together to share a commons ground, which is also the neutral line of the AC ports. The first DC bus(es) of the DC port(s) and the second DC bus(es) of the AC port(s) are connected together to form a converter DC bus with the DC-bus capacitor(s) connected to it. The ground-fault detection unit, connected between the common ground and the Protective Earth terminal, consists of a current sensor and a neutral ground resistor connected in series, together with a voltage sensor to measure the voltage between the Protective Earth terminal and the common ground. When the voltage of the Protective Earth terminal with respect to the common ground exceeds a certain value or when the current flowing through the ground-fault detection unit exceeds a certain value, a visual or audio warning signal is generated to warn the presence of a ground fault. A Residual Current Circuit Breaker or a Ground Fault Circuit Breaker can be connected to the AC port(s) to disconnect the converter in case of ground faults. Possible applications include any field that adopts power electronic converters that converts electricity between DC and AC, e.g., in wind power, solar power, storage systems, home appliances, IT equipment, motor drives, electric vehicles, more-electric aircraft, and all-electric ships.

10. 发明申请

US20220006375A1 AC/DC CONVERTER ARRANGEMENT 有权
公开(公告)号：US20220006375A1
公开(公告)日：2022-01-06
申请号：US17291285
申请日：2019-10-31
申请人： Eaton Intelligent Power Limited
发明人： Kenan Askan
IPC分类号： H02M1/32 , H02M1/00 , H02M7/219 , H02H3/02 , H02H7/122
摘要： An electrical AC/DC converter arrangement includes: an AC circuit breaker; a rectifier; at least one smoothing capacitor; at least one first isolating relay for electrical isolation; at least one first current sensor; and a control and monitoring unit. An input of the AC circuit breaker forms an AC input of the arrangement. An output of the AC circuit breaker is connected, at least indirectly by a circuit, to an input of the rectifier. The at least one smoothing capacitor connects a first output of the rectifier to a second output of the rectifier. The first output of the rectifier is connected, at least indirectly by a circuit, to an input of the at least one first isolating relay. An output of the at least one first isolating relay forms a first DC output of the arrangement and connects a DC network to at least one first DC load.

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