| 引用本文: | 窦会明,蔡旭,金之俭.三相偏磁桥路型限流器控制系统研制[J].电力自动化设备,2007,27(5):91-95 |
| .Study on control system of three-phase bridge type current limiter with magnetic bias[J].Electric Power Automation Equipment,2007,27(5):91-95 |
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| 摘要: |
| 设计的三相限流器控制系统由3个单相偏磁桥路型限流器、3个限流电抗器、励磁电源系统及电网运行状态监测系统组成,采用以2个数字信号处理器(DSP)为核心处理器的控制器,一个主要负责为偏磁桥路型限流器提供励磁电流;另一个主要负责监测电网电流、电压,实时采集电流、电压数据,当发生短路故障时及时作出判断,并通过CAN总线将控制参数发送给励磁控制器.分析了系统的工作原理,给出了三相控制系统的硬件、软件设计方案,并为控制系统的偏磁桥路型限流器设计了可以克服偶倍频反电势的基于DSP和现场可编程门阵列(FPGA)的数字励磁控制器.在所研制的380V/150A、最大故障限流1000A的偏磁桥路型限流器试验样机上进行了各种短路试验,试验结果表明所设计的控制系统软、硬件方案可行有效. |
| 关键词: 偏磁桥路型限流器 励磁电流 短路故障 |
| DOI： |
| 分类号:TM471 TP273 |
| 基金项目: |
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| Study on control system of three-phase bridge type current limiter with magnetic bias |
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DOU Hui-ming CAI Xu JIN Zhi-jian
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| Abstract: |
| The designed control system of three-phase FCL(Fault Current Limiter) consists of threesingle-phase bridge type FCLs with magnetic bias,three current-limiting reactors,excitation power supply system and power grid monitoring system.It adopts two DSPs as its core:one is to provide excitation current for the limiter;the other is to monitor the three-phase currents and voltages of power grid real-timely and sends control parameters in time to excitation controller through CAN bus when short circuit fault is detected.Its control principle is analyzed and its software and hardware design presented.The designed digital excitation controller based on DSP and FPGA may overcome the even frequency reverse electromotive force.Various short circuit experiments are carried out on the prototype with rated voltage of 380 V,rated current of 150 A and maximal fault current of 1 000 A.Results show that the designed control system is feasible and effective. |
| Key words: current limiter with magnetic bias excitation current short circuit fault |
