1756-L61
1756-L61
1756-L61
随着DCS在火电厂中的广泛应用，其在机组安全稳定运行中所占据的主导地位愈加突出。由于DCS设备软硬件的可靠性、控制逻辑的完善和合理性、热工人员维护和检修水平等诸多因素的影响，使机组误跳闸事件仍时有发生。因此进行有效的技术管理和正确的检修维护，保持火电机组DCS的稳定、可靠运行也就日渐成为热工人员日常管理、维护的重点。为此笔者结合上述案例分析，从提高控制系统可靠性着手，提出一些防范措施供检修维护中参考：
●对DCS设备和检修维护实行全过程管理，尽早发现缺陷并及时处理。完善DCS自诊断和故障报警功能，对DCS运行状况的实时监控不仅要监视主控制器的状态，还要监视主控制器网络的状态。
●制定合理的定期维护制度，详细规定检查维护的内容、方法和周期，并对检查结果进行分析，采取针对性的预防措施。镇海电厂自从试行这项制度以来，有效地控制了DCS故障的发生。
●制订DCS应急预案和典型故障处理方案，防止因维护不当引起的DCS故障。
●选用品质较好的备品配件，如主控制器的散热风扇、DP插头等，对于易损部件实行定期更换。
●对电子室的环境温度进行远程监测，接入DCS显示，实时掌握电子室环境温度的变化。使用中央空调的电子室还应注意湿度的控制，如有必要应增装独立的空调或除湿装置。
●检修时对模件电路板外观进行检查，能起到很好的预防效果。
◆ 企业名称：厦门泰尼电气有限公司
◆ 企业性质： 有限责任公司
◆ 主营业务：DCS,PLC
◆ 经营模式： 贸易
◆ 贸易地区： 全国
◆ 联系人： 小廖女士）
◆ ：
◆ 联系：
◆ QQ:1490371370
◆ 传真： （备注“01008”收）
◆ E-mail：
◆ 邮政编码： 361026
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SIMPLEX 636-802 FIRE ALARM PANEL UL I/O CARD
SIMPLEX 565-692 4120 NETWORK INTERFACE CARD 565-695
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CUTLER HAMMER WESTINGHOUSE FDP FDP324R 200 AMP 240V
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WESTINGHOUSE CUTLER HAMMER SIZE 3 100 AMP MOTOR STARTER BREAKER
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WESTINGHOUSE CUTLER HAMMER SIZE 3 125 AMP MOTOR STARTER BREAKER
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SQUARE D PQ PQ3206G 60 AMP 240V FUSIBLE BUS PLUG
WESTINGHOUSE LB LB3400 3 POLE 400 AMP TRIP 600V
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