Sungrow Power Supply has filed a patent for a power electronic device that allows for simple and cost-effective testing of the device in a photovoltaic system. The device detects fluctuations in electrical signal parameters and switches from a limited output state to a non-limited output state when certain conditions are met. This is achieved by applying a disturbance to the device’s input terminal using a direct-current power supply. GlobalData’s report on Sungrow Power Supply gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData s company profile on Sungrow Power Supply, smart energy mgmt systems was a key innovation area identified from patents. Sungrow Power Supply's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.
Power electronic device for testing and controlling photovoltaic systems
A recently filed patent (Publication Number: US20230179146A1) describes a power electronic device for use in a photovoltaic system. The device is designed to detect fluctuations in an electrical signal parameter at its input terminal and switch from a limited output state to a non-limited output state in response to meeting certain preset conditions. The fluctuations in the electrical signal parameter are generated by disturbances applied to the input terminal by a direct-current power supply with disturbance output.
The power electronic device can detect fluctuations in voltage, no-load current, or power at its input terminal. It can switch to a non-limited output state when the electrical signal parameter undergoes an abrupt change to a preset range or when the fluctuation of the electrical signal parameter follows a preset pattern.
The patent also describes two specific embodiments of the power electronic device. The first embodiment is a photovoltaic breaker that includes a semiconductor switch and a diode. The semiconductor switch is turned off in the limited output state and turned on in the non-limited output state.
The second embodiment is a photovoltaic optimizer that includes semiconductor switches, inductance, and capacitors. The semiconductor switches are turned off in the limited output state and have specific configurations in the non-limited output state.
The patent further describes a system for testing the power electronic device in a photovoltaic system. The system includes a direct-current power supply with disturbance output, a detection device (such as a voltmeter, oscilloscope, or multi-meter), and the power electronic device. The power electronic device is connected to the direct-current power supply, which applies disturbances to its input terminal. The detection device is used to measure the electrical signal parameter at the output terminal of the power electronic device.
The direct-current power supply with disturbance output can be a voltage-stabilized direct-current power supply connected in series with a resistor and a switching device. The switching device can be a controllable switch or a manual switch. Alternatively, the direct-current power supply can be a programmable direct-current power supply capable of outputting fluctuating electrical signal parameters through programming.
In summary, the filed patent describes a power electronic device for photovoltaic systems that can detect fluctuations in electrical signal parameters and switch between limited and non-limited output states based on preset conditions. The patent also includes specific embodiments of the power electronic device and a system for testing it.