A kind of control method of grid closing loop
A control method and power grid technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as excessive loop current, low accuracy, and enlarged blackout area, so as to improve power supply reliability, accuracy and The effect of high accuracy and reduction of power failure loss
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[0031] Embodiment: Take the 110 kV connecting line of two 220 kV substations as an example to describe the situation of main network loop closure. Such as figure 2 As shown, the power points of the two 220 kV substations come from the 220 kV busbar of the same 500 kV substation, and the two 220 kV substations are two three-coil substations running in parallel on the 110kV side and separately on the 35kV side, and there is no outgoing line on the 35kV side.
[0032] After the 110 kV line is loop-closed, an electromagnetic ring network is formed, and the power flow distribution conforms to the characteristics of the ring network. Assuming that the voltage of the entire network is the rated voltage, ignoring the admittance branch, draw the simplified equivalent circuit, as shown in image 3 As shown, using the loop current method, the equation can be listed:
[0033] (1)
[0034] ( is the flow resistance current, is the injection current of nodes, 2 and 3)
[0035] T...
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