Dynamic reactive power reserve optimization method for improving transient voltage stability of alternating-current and direct-current power grid
A transient voltage stabilization and power grid transient technology, applied in the field of optimization, can solve problems such as the lack of dynamic reactive power backup of multi-infeed DC receiving end power grids
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[0087] For the 3-machine 10-node system, the embodiment of the present invention changes the 5-circuit AC tie-line between busbars 5 and 6 into 2-circuit AC tie-line and 1-circuit bipolar DC transmission line, because the direction of the active power of the original AC line is Flows from node 5 to node 6, so let node 5 be the rectifier side and node 6 be the inverter side, such as image 3 shown. Due to the large reactive power absorbed by the DC system, SVCs with a capacity of ±180MVar and capacitor banks with a capacity of 1000MVar are respectively configured on node 6. Each capacitor bank has a capacity of 100MVar, and there are 10 groups in total. In addition, the unit, load and grid data of the original system remain unchanged. Thus, a modified test system for AC / DC hybrid transmission is formed.
[0088] Carry out a fault scan on this system to determine the critical fault set that threatens the voltage stability of the system. In order to illustrate the effectivenes...
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