135MW汽轮机组危急遮断系统说明书(英文)

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资料编号：71.D151.35-08E03

135MW TURBINE

EMERGENCY TRIP SYSTEM

SPECIFICATION

135MW汽轮机组危急遮断系统说明书

发布实施

中华人民共和国

上海汽轮机有限公司发布

此资料系上海汽轮机有限公司专有资料，属本公司产权所有。未经本公司书面同意，不准擅自

资料编号：71.D151.35-08E03

COMPILING DEPT.：

编制部门：自控中心

COMPILED BY：

编制：陈建2005.5

CHECKED BY：

校对：王正明2005.5

REVIEWED BY：

审核：王正明2005.5

APPROVED BY：

审定：杨炯2005.5

STANDARDIZED BY：

标准化审查：

COUNTERSIGN：

会签：

RATIFIED BY:

批准：

资料编号：71.D151.35-08E03

共 1 页第 1 页

1. GENERAL ............... . (1)

2. EMERGENCY TRIP CONTROL BLOCK (1)

3. TEST BLOCK (2)

4. THRUST BEARING TRIP DEVICE (3)

5. ELECTROLCAL OVERSPEED TRIP DEVICE ...............4 6. PRINCIPLE OF CONTROL LOGIC ...... . (4)

6.1 TRIP LOGIC (4)

6.2 TRIP CONTROL LOGIC (5)

7. INTRODUCE OF ETS CABINET AND PANEL (6)

7.1 POWER SUPPLY (6)

7.2 PLC USING ANNOTATES (6)

7.3 OPERATOR PANEL (7)

8. TESTING (10)

8.1 LOW BEARING OIL TEST (10)

8.2 ELECTRICAL OVERSPEED TEST (11)

8.3 MECHANICAL OVERSPEED TEST (11)

9. NOTE. (12)

1.GENERAL

The emergency trip system monitors certain turbine parameters and closes all turbine steam inlet valves when the operating limits of these parameters are exceeded. The parameters monitored as follows:

●Turbine over-speed

●Low bearing oil pressure

●Low condenser vacuum

●Low EH fluid pressure

●Thrust bearing wear

●Vibration bearing

●Differential expansion

●Remote trips which accept additional external trip are also provided

The system utilizes a two-channel concept that permits on-line testing with continuous protection afforded during the test sequence.

As illustrated in Figure 1, the system consists of an emergency trip control block with trip solenoid valves and status pressure switches, three test trip blocks with pressure switches and test solenoid valves, some of pickups of the turbine supervisory instrument (TSI), for example rotor position pickups etc., three speed pickups, a cabinet containing electrical and electronic hardware and a remotely mounted status and test panel.

The sensing devices at the turbine transmit electrical signals to the trip cabinet where control logic in the programming logical controller determines when to trip the auto stop emergency trip header.

2.EMERGENCY TRIP CONTROL BLOCK

Refer to Figure 2 for a schematic of this block. The auto stop emergency trip header pressure is established when the auto stop trip solenoid valves (20/AST) are energized closed. The valves are arranged in two channels for testing