Flexible arc extinguishing method for power distribution network based on single direct current source cascade H-bridge converter
A technology of converters and DC sources, applied in the direction of emergency protection circuit devices, electrical components, circuit devices, etc. used to limit overcurrent/overvoltage, can solve problems such as failure to suppress fault currents, and achieve optimal transient performance , DC side voltage balance, the effect of stability control
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[0105] Example 1:
[0106] In this embodiment, as figure 2 As shown in the figure, MATLAB / Simulink software is used to build a 10kV distribution network model with three-phase cascaded H-bridge converters to test the performance of the flexible arc suppression method for distribution networks based on a single DC source cascaded H-bridge converters. . The test results show that the method has high control accuracy and outstanding dynamic performance, can quickly and effectively suppress the faulty phase voltage, and at the same time the DC side voltage can maintain balance and stability. In the distribution network model, (X represents the three-phase serial number of A, B, and C, the same below) is a 10kV infinite system power supply; is the bus phase voltage; is the zero-sequence voltage of the distribution network; C X and r X are the distribution network-to-ground capacitance and leakage resistance, respectively, with parameters of 7μF and 30kΩ; Z X represents t...
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