Co-optimized configuration method of current limiting reactor and fault current limiter in flexible and direct grid
A technology of current limiting reactor and fault current limiter, applied in the direction of emergency protection circuit device, circuit device, emergency protection circuit device for limiting overcurrent/overvoltage, etc., can solve the lack of effective and reliable theoretical methods, Problems such as weak flow resistance and inability to achieve global optimal configuration
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specific Embodiment 1
[0116] by figure 1 The shown four-terminal flexible DC grid based on MMC is taken as an example, combined with figure 2 Specifically, the specific steps of the collaborative optimization configuration method for the current-limiting reactor of the flexible DC power grid and the fault current limiter proposed by the present invention are described.
[0117] In the collaborative optimization configuration method proposed by the present invention, the multi-objective optimization configuration mathematical model is solved by MOSFLA, and the specific steps are as follows:
[0118] Step S1, input system parameters, initialize MOSFLA parameters:
[0119] (1) Input system parameters
[0120] When the MMC-based four-terminal flexible DC grid system is in normal operation, the first converter station MMC1 acts as the master control station to control the DC voltage to 500kV. The second converter station MMC2, the third converter station MMC3, and the fourth converter station MMC4 a...
specific Embodiment 2
[0164] Taking scheme A in Table 2 as an example, the configuration scheme is shown in figure 1 In the shown four-terminal flexible DC grid, the first current-limiting reactor CLR 1 The inductance value is 0.161H, the second current limiting reactor CLR 2 The inductance value is 0.165H, the third current limiting reactor CLR 3 The inductance value is 0.168H, the fourth current limiting reactor CLR 4 The inductance value is 0.142H, the fifth current limiting reactor CLR 5 The inductance value is 0.169H, the sixth current limiting reactor CLR 6 The inductance value is 0.163H, the seventh current limiting reactor CLR 7 The inductance value is 0.155H, the eighth current limiting reactor CLR 8 The inductance value is 0.148H, and only the second fault current limiter FCL is configured 2 , the third fault current limiter FCL 3 , the fourth fault current limiter FCL 4 , the fifth fault current limiter FCL 5 , the seventh fault current limiter FCL 7 , the eighth fault current ...
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