Patents by Inventor Yanfei YU

Yanfei YU 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).

  • Publication number: 20240405561
    Abstract: A photovoltaic power generation system and a control method therefor, and a power converter are provided. The control method includes: obtaining MLPE state characterization information of the photovoltaic string; determining, based on the MLPE state characterization information, whether there is at least one MLPE device that fails to be in a normal output state; and if so, controlling a corresponding string current to be less than a preset threshold. Therefore, the power consumption of corresponding MLPE devices in the bypass operation state is reduced, allowing the MLPE devices to adopt a diode with a lower power capacity and a heat dissipation design with a lower heat dissipation requirement, and saving system costs.
    Type: Application
    Filed: May 25, 2022
    Publication date: December 5, 2024
    Applicant: Sungrow Power Supply Co., Ltd.
    Inventors: Yanfei Yu, Xinyu Wang, Xiaoxun Li
  • Publication number: 20240387129
    Abstract: A control method applied to a relay circuit is provided. The relay circuit includes a controller, a relay, a controllable switch, and a power supply. The controllable switch is connected in series with a coil of the relay. The power supply is configured to supply power to the coil of the relay. The controllable switch is controlled by the controller. The method includes: receiving an operating parameter of the relay by the controller; and adjusting a driving force applied to the relay, based on the operating parameter by the controller, to reduce a sum of a conduction loss and a driving loss of the relay, thereby improving the efficiency of the relay.
    Type: Application
    Filed: January 3, 2024
    Publication date: November 21, 2024
    Applicant: Sungrow Power Supply Co., Ltd.
    Inventors: Zongjun Yang, Yanfei Yu
  • Publication number: 20240371578
    Abstract: An inverter and a direct-current switch assembly are provided. The direct-current switch assembly comprises a direct-current switch and a connecting terminal unit, the direct-current switch and the connecting terminal unit being integrated on a mounting main body, the connecting terminal unit can realize connection and disconnection of a first terminal and a second terminal by means of the direct-current switch, and the direct-current switch is directly connected to a direct-current cable by means of the first terminal. The direct-current switch and the connecting terminal unit of the present invention are integrally mounted, not requiring a cable connection.
    Type: Application
    Filed: October 18, 2022
    Publication date: November 7, 2024
    Applicant: Sungrow Power Supply Co., Ltd.
    Inventors: Yanfei Yu, Zhanliang Shen, Peng Chen, Xiaoxun Li
  • Publication number: 20240373573
    Abstract: A wiring structure and an electrical box are provided. The wiring structure includes a first mounting member and a second mounting member, the first mounting member is used for being arranged outside the electrical box, and is provided with a plurality of conductive connectors; the conductive connectors extend into the electrical box to be connected to an internal device; the second mounting member is used for being detachably connected to the first mounting member, and is internally provided with a plurality of conductive fitting members; the conductive fitting members are connected to external cables; the external cables are slidably fitted with the second mounting member in a sealed manner, and the conductive fitting members are used for being connected to the conductive connectors in a fitting manner when the second mounting member is connected to the first mounting member in a fitting manner.
    Type: Application
    Filed: May 25, 2022
    Publication date: November 7, 2024
    Applicant: Sungrow Power Supply Co., Ltd.
    Inventors: Zhanliang Shen, Yanfei Yu, Peng Chen, Xiaoxun Li
  • Publication number: 20240356249
    Abstract: A PV terminal assembly includes a mounting frame and at least one PV terminal. The mounting frame is provided with mounting positions used for fixing PV terminals, and there are at least two mounting positions, so that at least two PV terminals can be integrated on the mounting frame. The number of PV terminals on the whole PV terminal assembly can be adjusted by adjusting the number of PV terminals on the mounting frame. An electrical device includes the PV terminal assembly.
    Type: Application
    Filed: May 25, 2022
    Publication date: October 24, 2024
    Applicant: Sungrow Power Supply Co., Ltd.
    Inventors: Zhanliang Shen, Yanfei Yu, Peng Chen, Xiaoxun Li
  • Patent number: 12115731
    Abstract: A surface disease repair system and method for an infrastructure based on climbing robots are provided. The system includes a detection and marking climbing robot and a repair climbing robot. In the process of moving on a surface of an infrastructure to be detected, the detection and marking climbing robot collects a front surface image in real time through a binocular camera arranged at a front end, detects a disease on the basis of the front surface image, and performs localization and map reconstruction at the same time; when a disease is detected, the position of the disease is recorded, and a marking device is controlled to mark the disease; after detection and marking are completed, the position of the disease and the map are sent to the repair climbing robot; and the repair climbing robot receives the map and the position of the disease, reaches the position of the disease, and repairs the disease according to the mark by using a repair device.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: October 15, 2024
    Assignee: SHANDONG UNIVERSITY
    Inventors: Jing Wang, Zhengfang Wang, Peng Jiang, Kefu Chen, Yanfei Yu, Wei Guo, Qingmei Sui
  • Patent number: 12119644
    Abstract: A method for controlling a photovoltaic rapid shutdown system, an inverting system, and a photovoltaic rapid shutdown system. In the photovoltaic rapid shutdown system, the inverting system determines whether the photovoltaic rapid shutdown system is to enter a safe mode, introduces fluctuations onto a direct-current bus in the photovoltaic rapid shutdown system in response to the photovoltaic rapid shutdown system being not to enter the safe mode, and otherwise does not introduce the fluctuations onto the direct-current bus. A shutdown device for a photovoltaic module determines according to an output parameter thereof whether an electrical parameter on the direct-current bus connected to the shutdown device meets a preset condition, controls itself to be turned on or maintains itself being on in response to the electrical parameter meeting the preset condition, and otherwise controls itself to be turned off or maintains itself being off.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: October 15, 2024
    Assignee: Sungrow Power Supply Co., Ltd.
    Inventors: Yu Yang, Yanfei Yu, Jun Xu, Qiaodi Chen
  • Patent number: 12057809
    Abstract: Provided are a method for controlling operation of a module level power electronics (MLPE) device, a method for controlling MLPE devices and a photovoltaic system. In the method for controlling operation of a MLPE device, if it is determined that a current of a photovoltaic string where the MLPE device is located is less than a current threshold and coding information sent by a converter in the photovoltaic system is not received for a first preset time period, an output voltage or an output power of the MLPE device is controlled to be less than a corresponding threshold.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: August 6, 2024
    Assignee: SUNGROW POWER SUPPLY CO., LTD.
    Inventors: Yanfei Yu, Anying Jiang, Yu Yang, Xiaoxun Li
  • Publication number: 20240258969
    Abstract: An inverter and a method for identifying a fault on an alternating current side of a photovoltaic system are provided. A controller records a waveform of a preset parameter of the photovoltaic system, and then transmits the recorded waveform to an external device. The external device that performs relatively excellently in data storage and processing stores the waveform and performs subsequent processing, to accurately recognize the fault on the alternating current side of the inverter. Further, the fine waveform can be seen from the external device, so that the accuracy of system monitoring is greatly improved. Moreover, the external device analyzes the waveform and generates a control instruction to accurately control the inverter due to advantages of storage capacity, big data, and computing power. In addition, system performance can be optimized in cooperation with a local control unit.
    Type: Application
    Filed: May 30, 2022
    Publication date: August 1, 2024
    Applicant: Sungrow Power Supply Co., Ltd.
    Inventors: Yanfei Yu, Liu Su, Fenglei Wu, Xiaoxun Li
  • Patent number: 11973349
    Abstract: 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: Grant
    Filed: July 13, 2021
    Date of Patent: April 30, 2024
    Assignee: SUNGROW POWER SUPPLY CO., LTD.
    Inventors: Yanfei Yu, Hua Ni, Zongjun Yang, Shangfang Dai
  • Publication number: 20240072534
    Abstract: A start method for a photovoltaic rapid shutdown system, an application apparatus and a system. In the method, an inverter system controls the voltage change of a corresponding direct current bus in a photovoltaic rapid shutdown system; and a photovoltaic module shutdown device performs determination according to a measured output voltage of itself, and controls itself to be turned on when the change characteristic of the voltage of the direct current bus connected to itself satisfies a preset turn-on condition. Therefore, merely by means of a self-contained voltage sampling device, the photovoltaic module shutdown device can determine whether a turn-on signal is received, without additionally providing a corresponding receiving device, thereby reducing hardware cost of the photovoltaic module shutdown device while realizing communication between the photovoltaic module shutdown device and the outside.
    Type: Application
    Filed: January 10, 2022
    Publication date: February 29, 2024
    Applicant: Sungrow Power Supply Co., Ltd.
    Inventors: Yu Yang, Yanfei Yu, Jun Xu, Qiaodi Chen
  • Patent number: 11894687
    Abstract: A photovoltaic system, a method for locating devices in a photovoltaic string, a MLPE apparatus, and a method for ranking MLPE apparatuses. Each MLPE apparatus sends, actively according to a predetermine rule, an initial message to the other MLPE apparatuses. The initial message includes a serial number corresponding to said MLPE apparatus and an accumulated operation duration of said MLPE apparatus. The MLPE apparatuses determine the rank of the accumulated operation duration of each MLPE apparatus according to the initial messages sent from all MLPE apparatuses. After each MLPE apparatus communicates with a communication host, the MLPE apparatuses reports the rank of the accumulated operation duration of each MLPE apparatus to the communication host. Thereby, the communication host may determine a physical location of each device in the photovoltaic string according to the ranks of the accumulated operation durations and a sequence of installing positions of the devices in the photovoltaic string.
    Type: Grant
    Filed: August 17, 2021
    Date of Patent: February 6, 2024
    Assignee: Sungrow Power Supply Co., Ltd.
    Inventors: Yanfei Yu, Anying Jiang, Xinyu Wang, Xiaoxun Li
  • Patent number: 11843241
    Abstract: An intelligent switch device and a power generation system are provided. The intelligent switch device includes a first power port, a second power port, a switch unit and a control unit. A first end of a switch unit is connected to a first power supply via a first power port, and a second end of the switch unit is connected to a second power supply via a second power port. The control unit is configured to control the switch unit to be turned on for a first time period when the first power supply is in abnormal condition, where the abnormal condition causes the switch unit to be tripped. The first time period is greater than or equal to a time period required for a device to respond to the abnormal condition.
    Type: Grant
    Filed: August 6, 2021
    Date of Patent: December 12, 2023
    Assignee: Sungrow Power Supply Co., Ltd.
    Inventors: Yanfei Yu, Zhifei Zhang, Xiaoxun Li
  • Patent number: 11799285
    Abstract: A method for starting a photovoltaic rapid shutdown system, an application apparatus and a system are provided. In this method, the inverter system controls a voltage of a direct current bus in the photovoltaic rapid shutdown system. The photovoltaic module breaker makes determination based on a detected output voltage of the photovoltaic module breaker. In a case that the change characteristics of the voltage of the direct current bus connected to the photovoltaic module breaker meets the predetermined turn-on condition, the photovoltaic module breaker controls itself to be turned on. Therefore, the photovoltaic module breaker can determine whether the photovoltaic module breaker receives a turn-on signal only based on its own voltage acquisition device without an additional receiving apparatus.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: October 24, 2023
    Assignee: Sungrow Power Supply Co., Ltd.
    Inventors: Yu Yang, Yanfei Yu, Jun Xu, Qiaodi Chen
  • Publication number: 20230291201
    Abstract: A method for controlling a photovoltaic rapid shutdown system, an inverting system, and a photovoltaic rapid shutdown system. In the photovoltaic rapid shutdown system, the inverting system determines whether the photovoltaic rapid shutdown system is to enter a safe mode, introduces fluctuations onto a direct-current bus in the photovoltaic rapid shutdown system in response to the photovoltaic rapid shutdown system being not to enter the safe mode, and otherwise does not introduce the fluctuations onto the direct-current bus. A shutdown device for a photovoltaic module determines according to an output parameter thereof whether an electrical parameter on the direct-current bus connected to the shutdown device meets a preset condition, controls itself to be turned on or maintains itself being on in response to the electrical parameter meeting the preset condition, and otherwise controls itself to be turned off or maintains itself being off.
    Type: Application
    Filed: March 8, 2021
    Publication date: September 14, 2023
    Applicant: Sungrow Power Supply Co., Ltd.
    Inventors: Yu Yang, Yanfei Yu, Jun Xu, Qiaodi Chen
  • Patent number: 11683008
    Abstract: A photovoltaic inverter, a photovoltaic system, and a method for controlling discharging are provided. The photovoltaic inverter includes a first DCDC converter, an inverter circuit, a first discharging circuit, and a controller. A port capacitor is connected between a positive input end and a negative input end of the first DCDC converter. The port capacitor includes an X capacitor and a first group of Y capacitors. The first discharging circuit is connected between a common terminal of the first group of Y capacitors and a direct current bus, where the common terminal of the first group of Y capacitors is grounded. The controller is configured to control, when receiving a rapid shutdown instruction, the first discharging circuit to operate. The first discharging circuit is configured to discharge electrical energy of the port capacitor.
    Type: Grant
    Filed: July 20, 2021
    Date of Patent: June 20, 2023
    Assignee: Sungrow Power Supply Co., Ltd.
    Inventors: Xinyu Wang, Anying Jiang, Shun Ding, Yanfei Yu, Xiaoxun Li
  • Publication number: 20230126969
    Abstract: A photovoltaic assembly turnoff device, and a photovoltaic system. The rapid turnoff method includes: after receiving a start signal, a photovoltaic assembly turnoff device controls itself to be turned on, so that a photovoltaic assembly connected thereto achieves electric energy output; then, the photovoltaic assembly turnoff device can measure a state parameter thereof to determine whether a corresponding inverter channel in a photovoltaic system has a fault; if the corresponding inverter channel in the photovoltaic system has the fault, control the photovoltaic assembly turnoff device to be turned off, so that the photovoltaic assembly connected thereto stops the electric energy output; if the corresponding inverter channel in the photovoltaic system has no fault, always keep the photovoltaic assembly turnoff device to be turned on.
    Type: Application
    Filed: March 8, 2021
    Publication date: April 27, 2023
    Applicant: Sungrow Power Supply Co., Ltd.
    Inventors: Yu Yang, Yanfei Yu, Xinyu Wang, Jun XU
  • Patent number: 11626837
    Abstract: A photovoltaic system and a method for locating devices in a photovoltaic string. A communication host in the photovoltaic system acquires accumulated operation durations of MLPE apparatuses of the photovoltaic string, ranks the accumulated operation durations to obtain a ranking result, and determines a physical location of each device in the photovoltaic string according to the ranking result and a sequence of installing positions of the devices, where the devices are installed at the installing positions based on the sequence. It is not necessary to paste label codes on the MLPE apparatuses, or record serial numbers of the MLPE apparatuses by installation personnel. Operation processes are simplified, operation time is saved, and labor costs are reduced.
    Type: Grant
    Filed: August 17, 2021
    Date of Patent: April 11, 2023
    Assignee: Sungrow Power Supply Co., Ltd.
    Inventors: Yanfei Yu, Xiaoxun Li, Anying Jiang, Xinyu Wang
  • Publication number: 20230106494
    Abstract: 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: Application
    Filed: March 8, 2021
    Publication date: April 6, 2023
    Applicant: Sungrow Power Supply Co., Ltd.
    Inventors: YU YANG, Yanfei YU, Jun Xu, Zongjun Yang, Xinyu Wang
  • Patent number: 11616376
    Abstract: A method for capacity expansion of an energy storage system and an energy storage system are provided. The method is applied to a controller in the energy storage system. The controller acquires a value of a characteristic parameter of a to-be-added second energy storage device as a target characteristic value. Then, the controller controls a charge/discharge power converter to charge or discharge first energy storage devices until a proximity of a value of a characteristic parameter of at least one first energy storage device to the target characteristic value is less than a preset proximity. Finally, a signal indicating that the second energy storage device is allowed to be connected into the energy storage system is generated and outputted to notify an operator.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: March 28, 2023
    Assignee: Sungrow Power Supply Co., Ltd.
    Inventors: Yanfei Yu, Xiaoxun Li, Zhifei Zhang