一种基于FPGA的阀基电子设备的研制

The development of VBE based on FPGA

阀基电子设备是换流阀系统中的重要设备,主要承担对换流阀中各门级驱动单元触发和监测的工作,是连接控制保护系统和换流阀的执行设备,其稳定可靠性对换流阀的安全运行起着至关重要的作用。设计了一种应用于高压直流输电系统中的阀基电子设备,该设备以FPGA为核心控制,双电源冗余设计,对外通信接口均为光纤,并采用频移键控方式对触发命令进行编码。实验证明了该设备具有实用性、可靠性和可扩展性,输出的各路脉冲宽度调制波形具有高精度的同步一致性,有效地保证了换流阀的稳定运行。

Valve base electronic devices（VBE） is an important equipment in the converter valve system. It is mainly responsible for the triggering and monitoring of the gate driver unit （GDU）in the valve. It is the execution device between the control protection master and the converter valve. The stability and reliability play a vital role in the safe operation of the converter valve system. This paper designs a VBE used in the high-voltage direct current transmission system. This VBE uses FPGA as control core, with the redundancy design of double power supply. The VBE used optical fiber as external communication interface, and encoded the trigger command by frequency-shlft keying. Experiments prove that this device is practical, reliable and scalable. Each pulse width modulation（PWM） waveform output form the VBE has a high precision synchronicity. It effectively guarantees the stable operation of the converter valve.