Starting control method for static frequency converter (SFC) of pump storage group

Abstract

The invention discloses a starting control method for a static frequency converter (SFC) of a pump storage group. The circuit of the starting control method is simple, and thus the control flow is enabled to be simple, and a real-time tackling measure can be easily carried out when an accident occurs. The starting control method comprises a pump storage group, an LCU 5, the SPC, an excitation system and a monitor system. The pump storage group, the LCU5, the excitation system and the monitor system are electrically connected with the SPC. The pump storage group, the LCU5 and the excitation system are electrically connected with the monitoring system. The pump storage group is electrically connected with the LCU5. The monitor system sends an instruction of SFC starting preparation to the LCU5, and then the LCU5 and the SFC jointly complete preparatory work before the pump storage group is started by the SFC. The monitor system sends an instruction to the LCU5 for pulling open a dragged knife switch of the pump storage group. The monitor system sends an instruction of running in a wattles adjusting mode to the excitation system, and sends an instruction of pulling open a starting bus knife switch to the LCU5, and thus the whole process of starting the pump storage group by the SPC is completed. The invention is mainly applied to the technology of starting the pump storage group.

Description

technical field [0001] The invention relates to the technical field of start-up of a pumped-storage unit, in particular to a start-up control method of a pumped-storage unit SFC. Background technique [0002] Existing pumped storage power stations generally use back-to-back, full pressure or reduced pressure to drive the start of the pumped storage unit. The full-voltage and reduced-voltage starting methods are that the unit is connected to the grid directly (full voltage) or through an impedance or transformer (half voltage). The full-voltage and reduced-voltage starting methods are suitable for small and medium-capacity units. The impact on the power grid and the unit itself is relatively large. The circuit structure of the back-to-back starting mode is relatively complicated, which makes the sequential control process more complicated, and it is difficult to deal with it in time and quickly in the event of an emergency. If the capacity of the unit is large, it is necess...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the control process of the existing SFC startup large-capacity pumped storage unit is relatively complicated, and it is difficult to promptly and quickly deal with sudden accidents, and provides a startup control method for the pumped storage unit SFC. The circuit structure of the starting control method is simple, and the whole process of SFC starting the pumped storage unit is also relatively simple, so the control process is also relatively simple, and it is easy to deal with it in time and quickly when an emergency occurs

Images