Multi-rate simulation method and system for joint simulation of flexible HVDC AC power network
A technology of AC power grid and simulation method, applied in the direction of electrical components, etc., can solve problems such as undiscovered
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[0155] Using the method proposed by the present invention to build a 2-terminal pseudo-bipolar MMC DC transmission system example, and compare it with the electromagnetic transient model in PSCAD. The structure of the example side is as follows figure 2 . The per-unit parameters of each component on the AC side, taking the system capacity as the base value, are as follows: rheological resistance Rt=0, reactance L t =0.075, generator reactance 0.082, commutation resistance Rc=0, reactance L c = 0.083. The DC line resistance is 5.683 ohms, the inductance is 0.376 henries, and the capacitance is 132 microfarads. The level number of the converter valve is 31, and the capacitance of the sub-module is 600 microfarads. The d-axis adopts master-slave control, and the q-axis is controlled by constant reactive power. 1.8s Three-phase grounding occurs on the grid side busbar of the transformer at the receiving end, and the grounding resistance is 0.01 ohms, which lasts for 0.1s.
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