| 汽轮机电气-液压油系统故障处理 |
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| 引用本文： | 洪祺桢.汽轮机电气-液压油系统故障处理[J].广东电力,2010,23(2):71-74. |
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| 作者姓名： | 洪祺桢 |
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| 作者单位： | 广东火电工程总公司,广东,广州510730 |
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| 摘 要： | 茂名石化动力厂热电三车间1号汽轮机电气-液压(electro-hydraulic,EH)油系统在调试过程中出现了3次故障:第一次是在进行静态超速保护控制(overspeed protection control,OPC)试验时,EH油系统压力和自动停机遮断(auto shut-down or trip,AST)油压力降至3MPa以下(汽轮机跳闸整定值为9.5MPa);第二次是危急保安器复位后,AST油和OPC油母管压力小于3MPa;第三次是中压抽汽调节阀打不开。采用排除法查找出故障原因:第一次故障的原因是线性可变差动变压器(linear variable differential transformer,LVDT)的反馈量与数字式电液调节系统(digital electro-hydraulic control system,DEH)的指令出现偏差;第二次故障是高压调节阀的LVDT松动所致;第三次故障是节流孔堵塞所致。提出解决办法:优化控制系统,使OPC系统动作时调节阀指令复零;固定好LVDT;清理节流孔。
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| 关 键 词： | EH油系统 电液伺服阀 卸荷阀 超速保护控制 自动停机遮断 |
Solutions for Failures of a Steam Turbine Electro-hydraulic Oil System |
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| HONG Qi-zhen.Solutions for Failures of a Steam Turbine Electro-hydraulic Oil System[J].Guangdong Electric Power,2010,23(2):71-74. |
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| Authors: | HONG Qi-zhen |
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| Affiliation: | Guangdong Power Engineering Corporation;Guangzhou;Guangdong 510730;China |
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| Abstract: | The electro-hydraulic(EH) oil system of No.1 steam turbine in the 3rd Thermal Power Plant of Maoming Petrochemical Co.,Ltd.experienced three faults: The first was that the EH oil system pressure and the auto shut-down or trip(AST) oil pressure fell below 3 MPa(the setting value for tripping steam turbine being 9.5 MPa) during static testing of overspeed protection control(OPC);the second was the oil common header pressure of AST and OPC was less than 3 MPa after the reset of emergency governor;the third was... |
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| Keywords: | electro-hydraulic （EH） oil system electro-hydraulic （EH） servo valve unloading valve overspeed protection control （OPC） auto shut-down or trip （AST） |
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