Fault-tolerant control method of direct-current energy dynamic adjusting device
A dynamic adjustment and fault-tolerant control technology, which is applied in the direction of DC network circuit devices, circuit devices, power transmission AC networks, etc., can solve the problem of affecting the calculation accuracy of input sub-modules, inability to adapt to incomplete bypass fault units, and deterioration of control performance and other issues, to achieve the effect of reducing switching frequency, reducing losses, and reducing voltage fluctuations
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[0045]In the first embodiment of the present invention, the normal sub-module voltage sampling accuracy is high in the normal sub-module voltage of the DC energy dynamic adjustment device. The main controller of the DC energy dynamic adjustment device is adoptedimage 3 The control flow diagram performs control of normal submodules. Control is implemented as follows:
[0046]Step 1: Collect the DC voltage UDC , Current I of DC Energy Dynamic Adjustment DevicechP Collect each normal sub-module voltage USMACT_i (The subscript i represents the i-th module, 0ACT ); Number of normal submodulesACT .
[0047]Step 2: Voltage U of each normal sub-moduleSMACT_i Strive, get the normal sub-module voltage and UDCACT .
[0048]Step 3: According toFigure 5 Directive value of the sum of the normal sub-module voltageDCACTREF , Where uDCREF For a given constant UDCCMD .
[0049]Step 4: According to the sum of the normal sub-module voltageDCACT Current I with DC energy dynamic adjustment devicechP Device normal su...
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