ugg laarzen S109FA combined cycle power plant cont

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S109FA combined cycle power plant control system and start and stop Bypass Abnormal

Opportunities for construction, first of all, take place all the new parts to fit all good. Then. Lines out of operation, will be located in central catheter line GIS interval outlet flange connection location of new access and restore lines running, testing will flow through the original pipe Hyun blue ground bus, ground bus of the new flange, tube holders a} u flow, note the time line load Iu flow, and the temperature rise a few points to monitor the situation. Comparative test data, on-line measure of reform effects. 5 results and thinking (1) the treatment is successful the current situation. Running for almost a year and a half from the situation, the effect is more obvious, the situation has greatly improved the heating screw, infrared imaging temperature measurement from the monitoring data, the temperature at the peak load does not exceed 120 ℃, for domestic peers handled similar problems in GIS provide a reference. (2) However, a long-time running, the contact surface to further corrosion, will not appear again before the phenomenon? Current treatment to withstand the test of time may need further monitoring and verification. (3) completely solve the problem: First, the equipment installation phase, in strict accordance with technical requirements to install and check, and make the monitoring data; the second is possible on the disintegration of the devices running on the contact surface thorough treatment. Port Editor: Juchuan (Continued from page 65) high pressure bypass pressure control valve spool, the body influenced by temperature, occurs at a high temperature non-uniform, non-synchronous deformation easily lead to the valve closed, especially in the hot boot process, often after the withdrawal of high-pressure bypass there will be a certain amount of high-pressure steam leak in the condenser. Leakage not only directly affect the units of heat economy, but also the pipeline for a long time after the valve operation over temperature creep pipe material will endanger the safe operation of the unit. Only in the high-pressure bypass pressure control valve temperature drop down, the high pressure bypass pressure control valve will close tightly. And this temperature drop of the process takes longer time, generally around 3h to be in, so to solve the fundamental problem of leakage is how to make high pressure bypass pressure control valve in the bypass can be closed down as quickly after the withdrawal. Treatment Strategies 3.2.2 operating personnel in the unit load into after working condition stable (usually after switching in the burning, that is 220MW) when human intervention, namely: manually turn off the bypass into the high-pressure electric steam isolation valves, manual by warm water to open large high-pressure bypass control valve opening,[link widoczny dla zalogowanych], the general control about 50%. When the high pressure bypass pressure control valve after the temperature I15 ℃ (because less warm water control valve in the automatic mode, the temperature is 145 ℃ customs valuation, taking into account manual intervention time is short, temperatures will rebound more, it is especially the temperature control was lower), the return to normal can be. Should be noted that manual intervention due to high pressure steam into electrical isolation valve bypass closed, high pressure bypass does not work, the high pressure waste heat boiler system pressure will rise. In this condition, once the unit trip the most adverse conditions occur, or load rejection, then the high pressure waste heat boiler overpressure system may endanger the safety of equipment, so the selection of a reasonable human intervention is extremely important load points. Table 2 is the Mid-unit load in three 9FA 240Mw, when the low-vacuum drum when the protection unit trip parameters, reflecting as in the 220 ~ 250Mw load manual intervention, or a rich degree of pressure. Table 2 Unit Load 240MW,[link widoczny dla zalogowanych], low vacuum drum when the protection unit trip parameter 4 Concluding remarks highlight the advantages of combined cycle gas turbine is a high efficiency,[link widoczny dla zalogowanych], pollution, starting quickly, peaking capacity, but at this stage, \dispatching the request, making the unit is usually open at night, stop, start and stop frequently, not for a long time to run at full capacity. Drum capacity of the combined cycle unit is small, the larger the main steam pressure in the gas turbine warm-up, or down low load such as a greater change in the bypass valve opening, the water level is often prone to false tripping,[link widoczny dla zalogowanych], so the bypass control parameters setting, the bypass control unit directly affects the quality of stable and safe operation of the economy. F-class gas turbines, GE commercial operation in real time is not very long, you also need more experience to maximize unit performance advantage. 【1】 mouth Reference GE company. PlantOperatingPhilosophy & GTOperatingCharacteristics [Z】. 2004. 【2】 Mid-Huadian Power Company Limited 9FA gas-steam combined cycle of a compilation 【z]. 2007. 【3】 coke tree construction. A gas-steam combined cycle theory 【M】. Tsinghua University Press, 2003. 【4】 Thermal Engineering, Tsinghua University, et al. Gas turbine and steam combined cycle gas plant [M】. China Electric Power Press, 2007. Editor: Wen Chang
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