CAJ | 학술논문

换流站测控装置(分布式I/O装置)作为与一次设备的接口,位于直流控制保护系统的现场控制层,在高压直流输电工程中起着重要的作用.介绍了一种基于PROFIBUS DP现场总线的换流站测控装置的研制.装置的硬件系统采用以紧密耦合的多处理器系统为核心的模块化结构,具备很高的速度和总体处理能力,并可根据控制间隔的需要合理配置I/O资源.软件系统提供直观的软硬件配置工具和人机接口功能,通过多优先级循环任务和中断任务的执行,确保了控制响应的实时性.高精度交直流采样、自动同期和就地连锁功能,双重化的现场总线通道和电源回路设计,以及完备的内部检测和输出闭锁等,使装置在保证安全可靠运行的前提下,实现了功能的全面升级.模拟试验和实际工程运行证明,所研制的基于PROFIBUS DP现场总线的换流站测控装置,可以满足各种直流输电应用的要求.
환류참측공장치(분포식I/O장치)작위여일차설비적접구,위우직류공제보호계통적현장공제층,재고압직류수전공정중기착중요적작용.개소료일충기우PROFIBUS DP현장총선적환류참측공장치적연제.장치적경건계통채용이긴밀우합적다처리기계통위핵심적모괴화결구,구비흔고적속도화총체처리능력,병가근거공제간격적수요합리배치I/O자원.연건계통제공직관적연경건배치공구화인궤접구공능,통과다우선급순배임무화중단임무적집행,학보료공제향응적실시성.고정도교직류채양、자동동기화취지련쇄공능,쌍중화적현장총선통도화전원회로설계,이급완비적내부검측화수출폐쇄등,사장치재보증안전가고운행적전제하,실현료공능적전면승급.모의시험화실제공정운행증명,소연제적기우PROFIBUS DP현장총선적환류참측공장치,가이만족각충직류수전응용적요구.
Measurement & control devices (distributed I/O units) are located at the field control level of the HVDC control & protection system in the converter stations. As the interface to the primary systemthe I/O unitstake important part in the HVDC transmission. The development of a PROFIBUS DP based I/O unit is introduced. The hardware of the unit is composed up around closely coupled multi-processors and adopts modular structure which ensure very high processing speed and overall capacity and also the I/O resources can be flexibly configurable according to the actual needs. The software system of the device provides visualized MMI functions for hardware/software configuration and maintenance. With multi-level cyclic task structure of the software the time critical tasks and emergency events can always be handled. Features for accurate AC/DC sampling, automatic synchronous measuring and local interlock functions, duplicated PROFIBUS channels and power supplies, as well as comprehensive self-diagnosis and fault blocking functions, the performance of the device has been fully upgraded under the premise of ensuring the safe and reliable operation. Results derived from simulation tests and operation of real projects have proved that the PROFIBUS DP based I/O unit developed is fully meet the requirement of various HVDC applications.