| 主权项 |
1. A direct current (DC) voltage control method, applied to a multi-terminal flexible DC transmission system, wherein the multi-terminal flexible DC transmission system comprises a DC voltage primary control station and at least one DC voltage secondary control station, and the method comprises:
determining, when it is determined that the DC voltage primary control station loses a DC voltage control function, whether the DC voltage primary control station can communicate with the DC voltage secondary control station, and if yes, sending, by the DC voltage primary control station, information about the DC voltage primary control station losing the DC voltage control function to the at least one DC voltage secondary control station and enabling a DC voltage control function of one of the at least one DC voltage secondary control station, so as to adjust the DC voltage; before the DC voltage control function of the DC voltage secondary control station is enabled, if the DC voltage exceeds an operation range, enabling, by the at least one DC voltage secondary control station, a DC voltage auxiliary control function, so as to adjust emitted or absorbed active power; and when the DC voltage primary control station cannot communicate with all of or some of the at least one DC voltage secondary control station, and if the DC voltage exceeds the operation range, enabling, by the at least one DC voltage secondary control station, a DC voltage auxiliary control function, so as to adjust current emitted or absorbed active power, and determining, according to a policy, one DC voltage secondary control station to enable a DC voltage control function, so as to adjust the DC voltage. |
