Outlet current-limiting reactor value determination method of flexible direct current power distribution system interface device
A flexible DC power distribution and current limiting reactor technology, applied in electrical components, power transmission AC network, emergency protection circuit devices, etc. and other problems to achieve the effect of improving the reliability of power supply
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[0026] Example
[0027] Such as figure 1 As shown, a method for determining the value of the outlet current-limiting reactor of the interface device of a flexible DC power distribution system includes the following steps:
[0028] S1 is based on the topology of ±10kV flexible DC power distribution system, such as figure 2 Shown. The number of inverters in the system N=6, and the VSC outlet capacitance is C VSC =1500μF, current-limiting reactor is L VSC , The bridge arm reactor is L q ; DCSST outlet capacitance is C DCSST =10000μF, current-limiting reactor is L DCSST ; DC cable inductance is L Cable , The resistance is R Cable .
[0029] S2VSC outlet discharge circuit such as image 3 Shown. According to the discharge circuit, the discharge process can be equivalent to a second-order capacitive inductance circuit superimposed on a first-order inductance circuit, and the fault current flowing through the DC circuit breaker can be obtained.
[0030]
[0031] Where: R Cstray(VS...
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