Study of the Emergency DC Power Support Strategy Based on the Principles of the Generalized Dynamics

Emergency HVDC power support (EDCPS) can be used for improving the transient stability of AC/DC power systems, but the effect is directly determined by the quantity, the starting time, the speed and other factors of the power support. In this article, the dynamic characteristics of AC/DC power systems after a fault are analyzed, generalized dynamical models of the AC/DC power system are established, the relationship between the duration and the quantity of the EDCPS and the dynamic characteristics of the system are established based on the impulse theorem, then the EDCPS strategy besed on the principles of the generalized dynamics is proposed. At last, it is verified by examples of simulation that the strategy can effectively improve the stability of the AC/DC power systems after a fault.