Intelligent power distribution method for independent DC microgrid
A technology of DC micro-grid and intelligent power, which is applied in the direction of load balancing in DC network, parallel operation of DC power supply, etc.
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[0063] In the following, the present invention will be further described from the aspects of model establishment, design principle, design method, and validity verification.
[0064] (1) Modeling of traditional droop control:
[0065] a) Droop control theory and power flow analysis
[0066] The DC power between the two nodes of the line impedance at the DG output forms a power flow, and the droop control method in the DC microgrid is proposed based on this power flow. Such as figure 1 The schematic diagram of the power flow in the DC microgrid shown, node A at both ends of the line impedance i and B i The DC voltage at the V oi and V di to represent respectively, the line resistance between two nodes can be expressed by R Li to indicate that the subscript i represents the number of the distributed generation unit in the DC microgrid. The instantaneous power P of each DC unit injected by distributed power into the grid i It can be calculated by the following formula:
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