TY - JOUR N2 - High voltage direct current (HVDC) emergency control can significantly improve the transient stability of an AC/DC interconnected power grid, and is an important measure to reduce the amount of generator and load shedding when the system fails. For the AC/DC interconnected power grid, according to the location of failure, disturbances can be classified into two categories: 1) interconnected system tie-line faults, which will cause the power unbalance at both ends of the AC system, as a result of the generator rotor acceleration at the sending-end grid and the generator rotor deceleration at the receiving-end grid; 2) AC system internal faults, due to the isolation effect of the DC system, only the rotor of the generator in the disturbed area changes, which has little impact on the other end of the grid. In view of the above two different locations of disturbance, auxiliary power and frequency combination control as well as a switch strategy, are proposed in this paper. A four-machine two-area transmission system and a multi-machine AC/DC parallel transmission system were built on the PSCAD platform. The simulation results verify the effectiveness of the proposed control strategy. L1 - http://journals.pan.pl/Content/111899/PDF/art_03.pdf L2 - http://journals.pan.pl/Content/111899 PY - 2019 IS - No 2 EP - 263 DO - 10.24425/aee.2019.128266 KW - unbalanced power KW - emergency control KW - power angle stability KW - frequency stability KW - control logic A1 - Li, Congshan A1 - He, Ping A1 - Wang, Youyi A1 - Ji, Yuyi A1 - Yang, Cunxiang PB - Polish Academy of Sciences VL - vol. 68 DA - 2019.05.27 T1 - HVDC auxiliary emergency power control strategy for power disturbance in two different positions of AC/DC interconnection system SP - 245 UR - http://journals.pan.pl/dlibra/publication/edition/111899 T2 - Archives of Electrical Engineering ER -