Patents by Inventor Zongjun Yang
Zongjun Yang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11973349Abstract: Provided are a device for suppressing potential induced degradation and a system. The device includes a rectification circuit, a non-isolated voltage conversion circuit and at least one capacitor. An input terminal of the rectification circuit is connected to an output terminal of a converter, the rectification circuit is configured to rectify an alternating current outputted by the converter into a direct current, the non-isolated voltage conversion circuit is configured to perform voltage conversion on the direct current outputted by the rectification circuit, and the voltage conversion is boost conversion or voltage reverse conversion. The capacitor is connected in parallel with an output terminal of the direct current, and either a positive electrode or a negative electrode of the capacitor is grounded.Type: GrantFiled: July 13, 2021Date of Patent: April 30, 2024Assignee: SUNGROW POWER SUPPLY CO., LTD.Inventors: Yanfei Yu, Hua Ni, Zongjun Yang, Shangfang Dai
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Publication number: 20240055867Abstract: A method and apparatus for matching between photovoltaic devices, and a photovoltaic tracking system are disclosed. Identifiers of trackers, inverters and MPPT branches in a photovoltaic power station are acquired; a preset action instruction is sent to a target tracker, to instruct the target track to act in response to the preset action instruction; inverter data is obtained after sending the preset action instruction, and an identifier of a target MPPT branch of a target inverter that subjects to an expected MPPT branch change is determined; and the target tracker is mapped to the identifier of the target MPPT branch. The target tracker is determined arbitrarily from the trackers in the photovoltaic power station. Therefore, mapping between the trackers and the MPPT branches can be obtained by applying the method to all the trackers, which has a high matching efficiency and is less error-prone.Type: ApplicationFiled: December 28, 2022Publication date: February 15, 2024Inventors: Zongjun YANG, Shaokun ZOU, Yanhu ZHANG
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Publication number: 20230402966Abstract: A photovoltaic system and a method for determining a combiner box set for the photovoltaic system are provided. The photovoltaic system includes a photovoltaic array divided into at least two combination groups, a photovoltaic converter, and a combiner box in at least one nonfinal stage and a combiner box in a final stage for each of the at least two combination groups. A direct current side of the photovoltaic converter is electrically connected to an output terminal of the combiner box in the final stage. The combiner box in the final stage and the combiner box in the at least one nonfinal stage are configured to combine outputs of photovoltaic strings in the combination group. Each combiner box combines multiple cables into a single cable.Type: ApplicationFiled: May 31, 2023Publication date: December 14, 2023Applicant: Sungrow Renewables Development Co., Ltd.Inventors: Zongjun Yang, Sanqi Tao, Fan Li
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Patent number: 11652412Abstract: A circuit for modulating a control signal, an inverter and a system for controlling a photovoltaic string. The circuit is based on a DC/DC boost circuit. The DC/DC boost circuit includes a controllable switch circuit, via which a second capacitor charges a first capacitor in the DC/DC boost circuit. A switch state of a first controllable switch in the DC/DC boost circuit is controlled when a voltage of the first capacitor is greater than or equal to a first voltage threshold, so that the first capacitor generates a control signal with a predetermined characteristic waveform.Type: GrantFiled: December 25, 2020Date of Patent: May 16, 2023Assignee: SUNGROW RENEWABLES DEVELOPMENT CO., LTD.Inventors: Zongjun Yang, Xiaoguang Li
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Publication number: 20230125139Abstract: After a first device logs in to a first account in a first application, the first receives a first operation performed by a user on the first application. Login information of the first account includes the first account, or the first account and a login password of the first account. The first device displays, in response to the first operation, a first interface including one or more device options. Each device option corresponds to one wireless device found by the first device. The first device sends, in response to a selection operation performed by the user on a first device option on the first interface, identity information of the first application and the login information of the first account to a second device corresponding to the first device option.Type: ApplicationFiled: November 2, 2020Publication date: April 27, 2023Inventors: Meiling Luo, Xiwen Fang, Zongjun Yang, Yilei Zhou
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Publication number: 20230106494Abstract: A photovoltaic system and a communication method therefor. The communication method includes: each slave sends a report signal to a host, and monitors a response signal of the host; and if the at least one slave receives the response signal, the corresponding slave executes a corresponding action on the basis of the response signal. Therefore, communication between the host and each slave is achieved in a mode that each slave actively sends the report signal, the host is prevented from adopting a roll call query mode, and occupation of bus resources by the host is reduced.Type: ApplicationFiled: March 8, 2021Publication date: April 6, 2023Applicant: Sungrow Power Supply Co., Ltd.Inventors: YU YANG, Yanfei YU, Jun Xu, Zongjun Yang, Xinyu Wang
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POWER DERATING METHOD FOR PHOTOVOLTAIC TRACKING SYSTEM, CONTROLLER, AND PHOTOVOLTAIC TRACKING SYSTEM
Publication number: 20220294227Abstract: A power derating method for a photovoltaic tracking system, a controller and a photovoltaic tracking system are provided. A current operating power and a target derating power of a photovoltaic inverter are acquired. A total power derating amount is calculated based on the current operating power and the target derating power. A target power derating amount by a photovoltaic tracker is determined based on the total power derating amount and a preset derating amount distribution coefficient. A target tracking angle is determined based on the target power derating amount. The photovoltaic tracker is controlled to adjust a photovoltaic module to be at the target tracking angle and fix the photovoltaic module. The photovoltaic inverter is controlled to adjust a direct current operating voltage based on a difference between the total power derating amount and the target power derating amount.Type: ApplicationFiled: March 4, 2022Publication date: September 15, 2022Applicant: Sungrow Renewables Development Co., Ltd.Inventors: Zongjun Yang, Shaokun Zou, Yanhu Zhang, Xiaoguang Li -
Patent number: 11399026Abstract: Embodiments relate to a permission management method and system. The method includes: receiving a first request sent by a controlled device. The first request includes a device identifier of the controlled device and indication information of a target operation; detecting a network status of a controlling device associated with the controlled device, where when the controlling device is in different network statuses, one or more controlled devices have different permission for performing respective operations; determining, based on the network status of the controlling device, the device identifier of the controlled device, and the indication information of the target operation, permission for performing the target operation by the controlled device; and processing the first request based on the determined permission for performing the target operation by the controlled device.Type: GrantFiled: March 31, 2017Date of Patent: July 26, 2022Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventor: Zongjun Yang
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Patent number: 11387777Abstract: An active bypass control device and an active bypass control method for a photovoltaic module are provided. The device includes a power source, a sampling unit, a controller, N first driving circuits, and N first controllable switches. Each first controllable switch is connected between one pair of bypass ports and includes a first switch and a first diode that are antiparallel. The first diode is reversely connected between the pair of bypass ports, and a control end of the first switch is connected to the controller via the corresponding first driving circuit. Based on a sampling signal provided by the sampling unit, the controller determines whether analog quantity information of the first controllable switch meets a predetermined bypass condition. If the predetermined bypass condition is met, the first switch is controlled to be turned on by using the first driving circuit.Type: GrantFiled: August 12, 2019Date of Patent: July 12, 2022Assignee: SUNGROW POWER SUPPLY CO., LTD.Inventors: Zongjun Yang, Yanfei Yu, Hua Ni
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Publication number: 20220216786Abstract: A circuit for modulating a control signal, an inverter and a system for controlling a photovoltaic string. The circuit is based on a DC/DC boost circuit. The DC/DC boost circuit includes a controllable switch circuit, via which a second capacitor charges a first capacitor in the DC/DC boost circuit. A switch state of a first controllable switch in the DC/DC boost circuit is controlled when a voltage of the first capacitor is greater than or equal to a first voltage threshold, so that the first capacitor generates a control signal with a predetermined characteristic waveform.Type: ApplicationFiled: December 25, 2020Publication date: July 7, 2022Applicant: SUNGROW RENEWABLES DEVELOPMENT CO., LTD.Inventors: Zongjun YANG, Xiaoguang LI
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Patent number: 11303113Abstract: A shutdown control system and a shutdown control method are provided. A main circuit is a series circuit formed by connecting output ends of multiple shutdown circuits in series or a series-parallel circuit formed by connecting output ends of multiple such series circuits in parallel. Each of the multiple shutdown circuits is connected to at least one of direct current power supplies in a distributed power generation system. A control circuit includes a SCU, one or more ACUs, and multiple PCUs corresponding to the multiple shutdown circuits. The SCU and the ACU are configured to transmit respective mode control instructions when respective condition is satisfied. Each of the multiple PCUs is configured to obtain multiple criteria based on the mode control instructions, determine a target operation mode of a corresponding shutdown circuit, and control the shutdown circuit to operate in the target operation mode.Type: GrantFiled: September 23, 2019Date of Patent: April 12, 2022Assignee: SUNGROW POWER SUPPLY CO., LTD.Inventors: Yanfei Yu, Hua Ni, Zongjun Yang
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Patent number: 11264804Abstract: A circuit for component voltage limitation and an apparatus for applying the same. A detection-and-control unit detects a parameter of a photovoltaic-cell string, and controls operation of a switch unit according to the parameter. In a case that the switch unit controls at least one photovoltaic cell connected to the switch unit to operate in a voltage-limited mode according to control of the detection-and-control unit, a voltage of the photovoltaic-cell string can be reduced. In a case that that the switch unit controls a photovoltaic cell operating in a voltage-limited mode to resume a normal output according to control of the detection-and-control unit, an output voltage of the photovoltaic-cell string can be increased. The rate of utilization on the direct voltage and the PVIR of DC/AC are improved for the photovoltaic system.Type: GrantFiled: May 13, 2019Date of Patent: March 1, 2022Assignee: SUNGROW POWER SUPPLY CO., LTD.Inventors: Renxian Cao, Zongjun Yang
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Publication number: 20210367555Abstract: A method for component voltage limitation, and an apparatus and a system for applying the same. At least one photovoltaic cell in a photovoltaic-cell string is controlled to operate in a voltage-limited mode, in response to receiving an instruction for enabling voltage limitation. Thereby, the voltage of the photovoltaic-cell string is reduced. A quantity of photovoltaic modules connected in series can be increased, while a highest voltage of the system is guaranteed not to exceed a corresponding requirement. A system cost is reduced. The photovoltaic cell operating in the voltage-limited mode is controlled to resume a normal output, in response to receiving the instruction for suspending voltage limitation. The output voltage of the photovoltaic-cell string is increased. Thereby, a rate of utilization on a direct voltage, and a PVIR of DC/AC are improved for the photovoltaic system.Type: ApplicationFiled: May 13, 2019Publication date: November 25, 2021Inventors: Renxian CAO, Zongjun YANG
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Publication number: 20210367427Abstract: A circuit for component voltage limitation and an apparatus for applying the same. A detection-and-control unit detects a parameter of a photovoltaic-cell string, and controls operation of a switch unit according to the parameter. In a case that the switch unit controls at least one photovoltaic cell connected to the switch unit to operate in a voltage-limited mode according to control of the detection-and-control unit, a voltage of the photovoltaic-cell string can be reduced. In a case that that the switch unit controls a photovoltaic cell operating in a voltage-limited mode to resume a normal output according to control of the detection-and-control unit, an output voltage of the photovoltaic-cell string can be increased. The rate of utilization on the direct voltage and the PVIR of DC/AC are improved for the photovoltaic system.Type: ApplicationFiled: May 13, 2019Publication date: November 25, 2021Inventors: Renxian CAO, Zongjun YANG
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Publication number: 20210344202Abstract: Provided are a device for suppressing potential induced degradation and a system. The device includes a rectification circuit, a non-isolated voltage conversion circuit and at least one capacitor. An input terminal of the rectification circuit is connected to an output terminal of a converter, the rectification circuit is configured to rectify an alternating current outputted by the converter into a direct current, the non-isolated voltage conversion circuit is configured to perform voltage conversion on the direct current outputted by the rectification circuit, and the voltage conversion is boost conversion or voltage reverse conversion. The capacitor is connected in parallel with an output terminal of the direct current, and either a positive electrode or a negative electrode of the capacitor is grounded.Type: ApplicationFiled: July 13, 2021Publication date: November 4, 2021Inventors: Yanfei YU, Hua NI, Zongjun YANG, Shangfang DAI
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Patent number: 11101661Abstract: Provided are a device for suppressing potential induced degradation and a system. The device includes a rectification module, a non-isolated voltage conversion module and at least one capacitor. An input terminal of the rectification module is connected to an output terminal of a converter, the rectification module is configured to rectify an alternating current outputted by the converter into a direct current, the non-isolated voltage conversion module is configured to perform voltage conversion on the direct current outputted by the rectification module, and the voltage conversion is boost conversion or voltage reverse conversion. The capacitor is connected in parallel with an output terminal of the direct current, and either a positive electrode or a negative electrode of the capacitor is grounded.Type: GrantFiled: March 30, 2017Date of Patent: August 24, 2021Assignee: SUNGROW POWER SUPPLY CO., LTD.Inventors: Yanfei Yu, Hua Ni, Zongjun Yang, Shangfang Dai
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Patent number: 11082004Abstract: A shutdown control system and a shutdown control method are provided. A main circuit is a series circuit formed by connecting multiple shutdown circuits in series or a series-parallel circuit formed by connecting multiple such series circuits in parallel. Each shutdown circuit is connected to at least one direct current power supply. A control circuit includes a SCU and multiple PCUs corresponding to the multiple shutdown circuits. The SCU and the PCUs are configured to transmit respective mode control instructions when respective condition is satisfied. Each PCU is configured to obtain multiple criteria based on the mode control instructions from the SCU and other PCUs, determine a target operation mode of the shutdown circuit corresponding to the PCU based on the multiple criteria, and control the shutdown circuit corresponding to the PCU to operate in the target operation mode.Type: GrantFiled: September 23, 2019Date of Patent: August 3, 2021Assignee: SUNGROW POWER SUPPLY CO., LTD.Inventors: Yanfei Yu, Zongjun Yang, Hua Ni, Huajin Chen
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Patent number: 11043802Abstract: A shutdown apparatus for a photovoltaic module is provided. Only one first switch is connected in series in an output circuit of the photovoltaic module, and a controller controls the first switch to be switched on in a normal power generation state and controls the first switch to be switched off in a shutdown state. If a short circuit fault occurs in the first switch, the controller controls a second switch connected in parallel with the photovoltaic module to be switched on, thereby causing the output of the photovoltaic module short-circuited and ensuring a reliable shutdown. In addition, the second switch is in the shutdown state when the photovoltaic module normally provides output, and the second switch does not cause losses to the output of the photovoltaic module, such that it is not necessary to select a device with a low impedance.Type: GrantFiled: August 14, 2019Date of Patent: June 22, 2021Assignee: SUNGROW POWER SUPPLY CO., LTD.Inventors: Zongjun Yang, Yanfei Yu, Hua Ni
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Patent number: 11031906Abstract: An IV curve scan method for a photovoltaic module and an optimizer are provided. The optimizer receives an IV curve scan signal and controls an output voltage of the photovoltaic module corresponding to the IV curve scan signal to change from an open-circuit voltage to a preset minimum voltage according to a preset rule, while photovoltaic module connected to another optimizer can still operate normally, so that the system can operate normally. Then the optimizer uploads IV curve data of the photovoltaic module corresponding to the IV curve scan signal, to complete an IV curve scan on a single photovoltaic module.Type: GrantFiled: February 5, 2018Date of Patent: June 8, 2021Assignee: SUNGROW POWER SUPPLY CO., LTD.Inventors: Hua Ni, Yanfei Yu, Yunfei Zou, Zongjun Yang, Liang Zhan, Liying Xue
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Patent number: 10998814Abstract: A power conversion system, a controller for the same, and a method for controlling the same. The power conversion system includes a shutdown array and a power converter. The shutdown array includes multiple shutdown strings that are connected in parallel. Each of the multiple shutdown strings includes multiple shutdown devices, where outputs of the multiple shutdown devices are connected in series. An output terminal of the shutdown array is connected to an input terminal of the power converter. An input terminal of each of the multiple shutdown devices is connected to at least one direct-current power supply. The controller sends a shutdown instruction to each shutdown device of the shutdown array in response to receiving a rapid-shutdown command, controls the power converter to discharge an input capacitor of the power converter, and stops discharging the input capacitor in response to an input voltage of the power converter being reduced to a preset voltage.Type: GrantFiled: February 21, 2020Date of Patent: May 4, 2021Assignee: SUNGROW POWER SUPPLY CO., LTD.Inventors: Zongjun Yang, Hua Ni, Xiaoxun Li, Haifeng Yang