Method for optimizing parameters of low-voltage current-limiting controller of weak receiving terminal power network direct-current transmission system
A DC transmission system, low-voltage current limiting technology, applied in emergency protection circuit devices for limiting overcurrent/overvoltage, power transmission AC network, electrical components, etc., can solve DC system continuous commutation failure, AC voltage and DC power cannot be restored, lack of systematic calculation methods, etc.
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[0036] Such as figure 1 Shown is the flow chart of the inventive method, below in conjunction with figure 1 and oneAn embodiment further illustrates the inventive method:
[0037] Select the Jiuhu UHV DC transmission project as an example. Jiuhu UHVDC starts from Jiuquan Converter Station in Gansu Province in the west and Xiangtan Converter Station in Hunan Province in the east. The transmission distance is about 2413km, the rated voltage is ±800kV, and the rated power is 8000MW. The VDCOL control characteristics adopted by the Jiuhu UHVDC transmission system are as follows: figure 2 shown. According to the present invention, the optimal design of the VDCOL control parameters of the Jiuhu UHVDC transmission system is carried out, and the main steps are as follows:
[0038] 1) Establish a simulation data platform for AC-DC hybrid power system. Based on the PSD-PSMODEL simulation platform, the electromagnetic transient simulation model of the Jiuhu UHVDC transmission sys...
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