Method for online misoperation prevention in 35kV-110kV power grid accident voltage loss area

Abstract

The invention relates to a method for online misoperation prevention in a 35kV-110kV power grid accident voltage loss area, which comprises the following steps: intercepting a topological relation between equipment after a switch accident occurs and generating a network tidal current diagram through a built-in topological system of a power grid; according to the network tidal current diagram, taking the transformer substation with the switch accident as a starting point and taking the switch with the accident as a demarcation point of the transformer substation with possible voltage loss during inspection, judging the transformer substations with tidal current connection one by one, and when the bus line voltage of one transformer substation is inspected to drop by 90% suddenly or is lessthan 1kV, determining that the transformer substation is a no-voltage transformer substation; performing self-inspection on all the voltage-loss substations, and determining whether the voltage-loss substations have abnormal conditions or not; and when an abnormal condition exists in the transformer substation without voltage, automatically locking the remote control function of the transformer substation, and sending a control instruction which is used for confirming whether to continue locking or unlocking and contains abnormal condition information to the remote control terminal.

Description

technical field [0001] The invention relates to an on-line anti-misoperation method in a 35kV-110kV power grid accident voltage loss area, which belongs to the field of power system dispatching. Background technique [0002] With the development of the power grid, the structure of the power grid is more complex, and the amount of power grid monitoring information is increasing due to the increase in substation equipment, and the workload of power grid monitoring is also increasing. At present, county-level power grid monitors monitor about 50 35kV-110kV substations and hundreds of thousands of substation signals in real time. When the weather is bad or a large area of ​​switches trips, it is easy to cause one or more substations to lose voltage. The monitoring personnel need to simultaneously process and analyze hundreds of abnormal signals sent at intervals including accident trips, equipment abnormalities, DC systems, and public measurement and control. It takes a long ti...

AI Technical Summary

Problems solved by technology

The loss of voltage in a 35kV substation means a power outage for hundreds of households in a town, and the loss of voltage in a 110kV substation may cause several 35kV substations to lose voltage at the same time. The loss caused by an extra minute of power outage is more than tens of thousands of yuan

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