A fast control method for flexible direct current transmission technology

Abstract

The invention provides a rapid control method for the flexible direct current power transmission technology. The method comprises the steps that multiple control board cards inside a valve control unit are divided into two kinds of control cycle board cards according to tasks, namely the rapid control cycle board cards and the slow control cycle board cards; a rapid control cycle sectional type processing method is adopted in the rapid control cycle board cards and includes a master CPU control and PCP communicating cycle, a sort algorithm control cycle and a unit communicating control cycle,the three control cycles are equal in time duration, the three cycles are arranged in an assembly line state, and time overlapping exists between every two adjacent control cycles. A control cycle time prolonging method is adopted in the slow control cycle board cards, and the control cycle in the slow control cycle board cards is set as the control cycle multiple times as long as the master CPU control cycle time duration. The control cycle of a flexible direct current power transmission valve control system can be effectively shortened, so that various adverse effects caused by the excessively-long control cycle on the control effect are avoided.

Description

technical field [0001] The invention relates to the field of high-voltage direct-current transmission in electric power systems, in particular to a valve control method for a large-current high-voltage flexible direct-current transmission converter valve. Background technique [0002] Flexible direct current transmission system equipment such as figure 1 As shown, the general composition includes (from upper layer to lower layer): station control protection system, pole control protection equipment, converter valve control system (including valve control cabinet and pulse distribution cabinet) and converter valve. The station control protection system is the "brain" of the flexible direct current transmission system, and it is the guarantee for the safe, reliable and stable operation of the direct current transmission system; the converter valve is the core component of the direct current transmission system; the pole control protection equipment and the converter valve cont...

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Problems solved by technology

3) The overall delay of the valve level control and protection system is relatively long, which is not conducive to the rapid protection of serious faults such as DC bipolar short circuit and the ride-through of AC side faults

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