Back to results
US 12,646,923 B2Granted
Circuit protection method, system and apparatus
AssigneeAltenergy Power System Inc.
InventorsBiaojie Qi, Yongchun Yang, Yuhao Luo, Jian Wu
Life of this patent
Estimating the term…
Abstract
A circuit protection method, system, and apparatus are provided. The method includes: receiving a current between an output terminal of the inverter circuit and a power grid; determining, based on the current, whether a current abnormality occurs; and controlling to switch off switch transistors in the inverter circuit, on determining that a current abnormality occurs.
Claims11
A circuit protection method, applied to an inverter circuit, comprising:
- receiving a current between an output terminal of the inverter circuit and a power grid;
- determining, based on the current, whether a current abnormality occurs;
- and
- controlling to switch off switch transistors in the inverter circuit, on determining that a current abnormality occurs;
- wherein a filter inductor is connected with the output terminal of the inverter circuit and the power grid, a filter capacitor is connected to the output terminal of the inverter circuit, a first terminal of the filter capacitor is connected to a second terminal of the filter inductor and the power grid, a second terminal of the filter capacitor is connected to a negative electrode of a bus capacitor of the inverter circuit;
- the receiving a current between an output terminal of the inverter circuit and a power grid comprises:
- receiving a current between the power grid and both the filter capacitor and the filter inductor;
- and
- the current between the power grid and both the filter capacitor and the filter inductor is tested to determine whether the current meets a requirement of a grid standard, and the switch transistors are switched off in a case that the current does not meet the requirement.
6 more elements
A circuit protection system, comprising:
- a signal receiver, configured to receive a current between an output terminal of an inverter circuit and a power grid;
- a detector, configured to determine, based on the current, whether a current abnormality occurs, and trigger a controller on determining that the current abnormality occurs;
- and
- the controller, configured to control to switch off switch transistors in the inverter circuit;
- wherein a filter inductor is connected with the output terminal of the inverter circuit and the power grid, a filter capacitor is connected to the output terminal of the inverter circuit, a first terminal of the filter capacitor is connected to a second terminal of the filter inductor and the power grid, a second terminal of the filter capacitor is connected to a negative electrode of a bus capacitor of the inverter circuit;
- the current between the output terminal of the inverter circuit and the power grid is received by:
- receiving a current between the power grid and both the filter capacitor and the filter inductor;
- and
- the current between the power grid and both the filter capacitor and the filter inductor is tested to determine whether the current meets a requirement of a grid standard, and the switch transistors are switched off in a case that the current does not meet the requirement.
6 more elements
A circuit protection apparatus, comprising:
- a memory, storing a computer program;
- and
- a processor, configured to execute the computer program to:
- detect a current between an output terminal of the inverter circuit and the power grid;
- determine, based on the current, whether the current abnormality occurs;
- and
- control to switch off the switch transistors in the inverter circuit, in a case that the comparator determines that the current abnormality occurs;
- wherein a filter inductor is connected with the output terminal of the inverter circuit and the power grid, a filter capacitor is connected to the output terminal of the inverter circuit, a first terminal of the filter capacitor is connected to a second terminal of the filter inductor and the power grid, a second terminal of the filter capacitor is connected to a negative electrode of a bus capacitor of the inverter circuit;
- the current between the output terminal of the inverter circuit and the power grid is detected by:
- detecting a current between the power grid and both the filter capacitor and the filter inductor;
- and
- the current between the power grid and both the filter capacitor and the filter inductor is tested to determine whether the current meets a requirement of a grid standard, and the switch transistors are switched off in a case that the current does not meet the requirement.
9 more elements
Dependencies are inferred from the claim text.