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作者：北京廣利核系統(tǒng)工程有限公司 施偉

摘要：電廠DCS的事件順序（SOE）記錄功能用于應(yīng)對(duì)雪崩性故障、報(bào)警信息的先后時(shí)間記錄，以便查找故障源頭。通常SOE采集設(shè)備多達(dá)上百個(gè)通道，且每個(gè)通道都能分辨至少1ms的先后順序。采用測試裝置進(jìn)行測試時(shí)，測試裝置的輸出通道應(yīng)覆蓋所有實(shí)際采集通道，且輸出的信號(hào)序列間隔要求小于1ms。目前，行業(yè)上采用定時(shí)器實(shí)現(xiàn)的信號(hào)發(fā)生器輸出通道數(shù)量有限，使用不夠靈活，且大多是針對(duì)分辨率測試的單一功能。本文提出一種基于FPGA技術(shù)實(shí)現(xiàn)的測試裝置，該裝置能夠根據(jù)需求靈活部署多達(dá)200個(gè)通道的輸出，每個(gè)通道輸出的事件序列時(shí)間都能達(dá)到微秒級(jí)的步進(jìn)調(diào)節(jié)，每個(gè)通道都能進(jìn)行頻率、相位、占空比的調(diào)制輸出。可對(duì)SOE記錄時(shí)間準(zhǔn)確性的驗(yàn)證，還可對(duì)DCS的負(fù)載、容量、運(yùn)行壓力、開關(guān)電弧干擾等多方面的測試。

關(guān)鍵詞：SOE；順序分辨率；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

在線預(yù)覽：電力DCS系統(tǒng)的SOE功能測試裝置設(shè)計(jì)和實(shí)現(xiàn)

摘自《自動(dòng)化博覽》2021年3月刊