Based on dynamic parameters of the short-circuit track Dai Weinan equivalent ratio calculation

The present invention provides a short-circuit based on a dynamic tracking Dai Weinan equivalent ratio parameter calculation method comprising the steps of: AC and DC system fails to select the object as the commutation bus; obtaining dynamic Dai Weinan AC converter system bus like looking into and the potential value of impedance; calculating the dynamic cross-over short-circuit current of the system; the dynamic strength than real-time short circuit is determined AC and DC systems. The present invention provides a method for calculating the dynamic tracking Dai Weinan equivalent parameters based on short-circuit ratio, by changing the ratio of the short-circuit fault monitoring system of AC-DC system, reflecting the ability to support fault DC AC system. Online and off-line analysis control simulation analysis, which will help run the AC and DC systems, analysts take timely and effective measures to improve the security and stability of the level of large grid of the present invention can be applied in power system.