A method and device for analyzing cascading faults in transmission sections of AC and DC power grids
A technology for AC power transmission and cascading failures, which is applied in the layout of AC and DC network circuits, circuit devices, and AC network circuits.
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Embodiment 1
[0055] see figure 1 , is a schematic flow chart of a method for analyzing cascading faults in transmission sections of an AC / DC power grid provided in Embodiment 1 of the present invention, and the method includes steps S101 to S105.
[0056] S101. Select an AC transmission section of the power grid, and acquire line current data of each transmission line in the AC transmission section.
[0057] S102. According to the line current data of the transmission line, using a preset electromechanical and electromagnetic simulation model, calculate the power flow transfer coefficient between the transmission lines in the AC transmission section.
[0058] In an optional embodiment, step S101 is specifically:
[0059] Calculate the power flow transfer coefficient between the transmission lines in the AC transmission section according to the formula (1):
[0060]
[0061] in, is the transmission line L i For transmission line L k The power flow transfer coefficient; L i , L k ...
Embodiment 2
[0105] see image 3 , which is a schematic structural diagram of an analysis device for cascading faults in transmission sections of AC and DC power grids provided in Embodiment 2 of the present invention, including:
[0106] AC transmission section selection module 201, configured to select an AC transmission section of the power grid, and obtain line current data of each transmission line in the AC transmission section;
[0107] The power flow transfer coefficient calculation module 202 is used to calculate the power flow transfer coefficient between the transmission lines in the AC transmission section using a preset electromechanical electromagnetic simulation model according to the line current data of the transmission line;
[0108] The maximum overload rate calculation module 203 is used to calculate the maximum overload rate of each transmission line in the AC transmission section according to the power flow transfer coefficient between the transmission lines in the AC...
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