A control method, device, equipment and medium for safe operation of power grid

Abstract

The application discloses a control method, device, equipment and medium for the safe operation of a power grid. The method includes: when a single-phase bus short circuit occurs in the target power grid containing a reactance-type superconducting current limiter, then obtain the single-phase The system admittance matrix under short circuit; according to the system admittance matrix and the injection current of the target grid, the target voltage of each busbar in the target grid under the bus single-phase short circuit is obtained; according to the target voltage, the target current of each busbar in the target grid to ground is obtained; using The target current and injection current determine the short-circuit current of the reactive superconducting current limiter in the event of a bus single-phase short circuit; use the reactive superconducting current limiter to limit the short-circuit current within the rated breaking current range of the circuit breaker in the target grid , to ensure the safe operation of the target grid. Obviously, this method can guarantee the safety and reliability of the target power grid during operation.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a control method, device, equipment and medium for safe operation of power grids. Background technique [0002] In the process of a short-circuit fault in the power grid, huge thermal effects and dynamic effects will be generated. Among them, the thermal effect will increase the temperature of the surrounding environment sharply. , and cause the electrical equipment in the power grid to explode, so if a short-circuit fault occurs in the power grid, there will be a great potential safety hazard. Since the reactive superconducting current limiter can significantly inhibit the short-circuit current in the power grid, the reactive superconducting current limiter has been widely used in the power grid. Among all the short-circuit faults that occur in the power grid, the single-phase short-circuit fault of the bus can reach more than 80%. However, in the prior art, there has not y...

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Problems solved by technology

Among all the short-circuit faults that occur in the power grid, the single-phase short-circuit fault of the bus can reach more than 80%. However, in the prior art, there has not yet been research on the calculation of the single-phase short-circuit current of the bus with a reactive superconducting current limiter. , which greatly limits the safe and stable operation of the power grid

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