作者：北京广利核系统工程有限公司 施伟

摘要：电厂DCS的事件顺序（SOE）记录功能用于应对雪崩性故障、报警信息的先后时间记录，以便查找故障源头。通常SOE采集设备多达上百个通道，且每个通道都能分辨至少1ms的先后顺序。采用测试装置进行测试时，测试装置的输出通道应覆盖所有实际采集通道，且输出的信号序列间隔要求小于1ms。目前，行业上采用定时器实现的信号发生器输出通道数量有限，使用不够灵活，且大多是针对分辨率测试的单一功能。本文提出一种基于FPGA技术实现的测试装置，该装置能够根据需求灵活部署多达200个通道的输出，每个通道输出的事件序列时间都能达到微秒级的步进调节，每个通道都能进行频率、相位、占空比的调制输出。可对SOE记录时间准确性的验证，还可对DCS的负载、容量、运行压力、开关电弧干扰等多方面的测试。

关键词：SOE；顺序分辨率；累加器；FPGA

Abstract: The sequence of events (SOE) function of DCS of modem is used to record the sequence of avalanche fault and alarm information, so as to find the source of fault. Generally, there are hundreds of channels in SOE acquisition equipment, and each channel can distinguish the sequence of at least 1 millisecond. When the test device is used for testing, the output channel of the test device should cover all the actual acquisition channels, and the interval of the output signal sequence should be less than 1 millisecond. At present, the number of output channels of signal generator realized by timer is limited, and the use is not flexible enough, and most of them are for single function of resolution test. In order to solve the problem, a signal generator based on FPGA technology is proposed, which can flexibly deploy up to 200 channels of output according to the demand. The event sequence time of each channel can reach the microsecond level step adjustment, and each channel can carry out the modulation output of frequency, phase and duty cycle. It can verify the accuracy of SOE recording time, and can also test the load, capacity, operating pressure and switching arc interference of DCS.

Key words: SOE; Sequential resolution; Accumulator; FPGA

在线预览：电力DCS系统的SOE功能测试装置设计和实现

摘自《自动化博览》2021年3月刊