CN217001988U - Control device of turbine lubricating oil system - Google Patents

Abstract

The utility model relates to a control device of a turbine lubricating oil system, which comprises a DCS control system and a motor control center which are electrically connected, wherein the motor control center is electrically connected with a first alternating-current lubricating oil pump, a second alternating-current lubricating oil pump, a direct-current emergency oil pump and a heater in the lubricating oil system, the DCS control system is electrically connected with a first pressure transmitter, a second pressure transmitter, a third pressure transmitter, a system main pipe pressure transmitter, a temperature measuring thermal resistor and a liquid level transmitter, and the DCS control system is also connected with an upper computer through a data connecting wire. The utility model has the advantages that: the DCS control system is subjected to complex and fussy state definition and logic optimization, the automatic operation mode setting of the oil supply equipment is realized, the manual and automatic modes can be switched randomly, the periodic availability test control scheme of the lubricating oil pump is increased, the one-key start-stop control of the turbine lubricating oil equipment is met, the personnel supervision operation intensity is reduced, and the availability and reliability of the equipment and the operation safety of the turbine are enhanced.

Description

Control device of turbine lubricating oil system

Technical Field

The utility model relates to the technical field of turbine lubricating oil systems, in particular to a control device of a turbine lubricating oil system.

Background

The steam turbine is the main equipment of modern thermal power generation, and is a high-speed rotating mechanical equipment. The turbine equipment may cause oil cut due to unreliable lubrication oil pump, aging of a control loop, power failure of a direct current screen, misoperation of operators and the like, so that the conditions of equipment damage, bearing bush burnout, journal abrasion and the like are caused. Therefore, a reliable and stable lubricating oil supply system and related equipment are required for the normal and safe operation of the steam turbine.

The existing lubricating oil supply system of the steam turbine has two types: one is, the lubricating oil system that equipment such as the mechanical main oil pump that is linked with rotor spindle of the steam turbine, starting oil pump, spare electronic lubricating oil pump, direct current accident oil pump, oil ejector make up, start the switching of oil pump and mechanical main oil pump after the steam turbine starts, the control method is manual and artificial in the whole course, it is easy to appear to switch lubricating oil and safeguard the oil pressure fluctuation of oil in the course of oil pump; the other is a lubricating oil system consisting of two mutually standby alternating-current lubricating oil pumps, a direct-current accident oil pump and related equipment, the control method of the lubricating oil system mainly depends on the oil pressure of a lubricating oil main pipe to interlock the oil pumps to act, and the standby lubricating oil pump and the direct-current accident oil pump are manually operated by an operator in regular tests and depend on the technical level and the capability of the operator.

The manual operation of the turbine lubricating oil supply system can cause the instability of the lubricating oil supply system due to the reasons of operator error, insufficient operation experience, technical level, capability limitation and the like, and can possibly generate serious results. Therefore, the lubricating oil supply system needs to be provided with reliable and stable oil supply equipment, and the equipment is provided with automatic operation mode setting of the oil supply equipment on the basis of ensuring the safe operation of the unit, so that the automatic interlocking control of the lubricating oil pump set can be realized. In addition, the existing turbine lubricating oil supply equipment does not have the automatic availability test function of the pump set, and the availability automatic test of the pump set and the availability and reliability of the automatic monitoring pump set can avoid major accidents such as tile burning and the like caused by oil cut of the turbine to the maximum extent, so that the problem to be solved is also solved.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a control device of a turbine lubricating oil system, which designs an oil pump availability test control scheme and feeds back a test result, a standby lubricating oil pump and a direct-current accident oil pump can be automatically started and stopped in the whole process without manual intervention, the operation intensity of monitoring operation of operators is reduced, and the availability and reliability of equipment and the safety of turbine operation are enhanced.

The lubricating oil system of steam turbine contains the oil tank, first interchange lubricating oil pump, second interchange lubricating oil pump, direct current accident oil pump, still including installing in the first pressure transmitter that first interchange lubricating oil pump exported, install in the second pressure transmitter that second interchange lubricating oil pump exported, install in the third pressure transmitter of direct current accident oil pump export and install in the system mother pipe pressure transmitter in the lubricating oil system mother pipe, in addition, the heater is still installed to the oil tank, liquid level transmitter and temperature measurement thermal resistance, and corresponding fuel feeding and oil return pipeline and annex. For the sake of brevity and clarity, the first ac lubricating oil pump is also denoted by "oil pump 1", and the second ac lubricating oil pump is also denoted by "oil pump 2".

The technical scheme adopted by the utility model is as follows: the utility model provides a controlling means of steam turbine lubricating oil system, includes DCS control system and the motor control center that links with DCS control system electricity, motor control center control and electricity are connected with first interchange lubricant pump, second interchange lubricant pump, direct current accident oil pump and the heater in the lubricant system, DCS control system electricity is connected with first pressure transmitter, second pressure transmitter, third pressure transmitter, the female pipe pressure transmitter of system, temperature measurement thermal resistance and liquid level transmitter, DCS control system still is connected with the host computer through data connection line.

As a further limitation to the above technical solution, the first pressure transmitter is installed in an outlet pipeline of the first ac lubricating oil pump, the second pressure transmitter is installed in an outlet pipeline of the second ac lubricating oil pump, the third pressure transmitter is installed in an outlet pipeline of the dc accident oil pump, the system main pipe pressure transmitter is installed in a main pipe pipeline of the lubricating oil system, the system main pipe pressure transmitter includes three single pressure transmitters sequentially installed in the main pipe pipeline, and the heater, the temperature measuring thermal resistor and the liquid level transmitter are installed in an oil tank of the lubricating oil system.

As a further limitation to the above technical solution, the DCS control system includes an AI card for analog input, a DI card for switching value input, an RTD card for thermal resistance input, and a CPU card for control operation, and further includes an AO card for analog output, and a DO card for switching value output, the AI card, the DI card, and the RTD card collect on-site pressure, switching value, and temperature signals and input them to the CPU card, the CPU card outputs signals from the DO card to the motor control center via real-time operation results, and the motor control center turns on or off each oil pump and heater device via a relay according to instructions of the output signals. The DCS control system is also connected with a power supply.

As a further limitation to the above technical solution, the motor control center includes a relay for controlling the start/stop of the oil pump and the heater, an oil pump and heater operation feedback relay, an oil pump and heater failure relay, and an oil pump local control cabinet.

The starting/stopping relay of the oil pump and the heater is provided with an oil pump 1 starting contact, an oil pump 2 starting contact, an accident oil pump starting contact, a heater starting contact, an oil pump 1 stopping contact, an oil pump 2 stopping contact, an accident oil pump stopping contact and a heater stopping contact.

The oil pump and heater operation feedback relay is provided with an oil pump 1 operation feedback contact, an oil pump 2 operation feedback contact, an accident oil pump operation feedback contact and a heater operation feedback contact.

And the oil pump and heater fault relay is provided with an oil pump 1MCC fault contact, an oil pump 2MCC fault contact, an accident oil pump MCC fault contact and a heater MCC fault contact.

The oil pump local control cabinet is provided with an oil pump 1 local/remote change-over switch, an oil pump 2 local/remote change-over switch, an accident oil pump local/remote change-over switch and a heater local/remote change-over switch.

As a further limitation to the above technical solution, the upper computer includes a soft operation button, an RS trigger, an SR trigger, a TON1 time delay trigger block, a TOFF1 time delay stop block, and a TP function block.

The soft operation button comprises a one-key starting button, a 1-hand automatic switching button of the oil pump, a 2-hand automatic switching button of the oil pump, a 1-hand main pump mode button of the oil pump, a 2-hand main pump mode button of the oil pump, a 1-fault resetting button of the oil pump, a 2-fault resetting button of the oil pump, an accident oil pump fault resetting button, a pump availability test input button, a 1-hand starting button of the oil pump, a 1-hand stopping button of the oil pump, a 2-hand starting button of the oil pump, a 2-hand stopping button of the oil pump, an accident oil pump starting button, an accident oil pump stopping button and a pump set availability test button.

The SR trigger comprises a first RS trigger for triggering the automatic/manual mode of the oil pump 1 and a second RS trigger for triggering the automatic/manual mode of the oil pump 2.

The SR trigger comprises a first SR trigger triggering a main pump/slave pump mode of an oil pump, a second SR trigger triggering the fault/reset of the oil pump 1, a third SR trigger triggering the fault/reset of the oil pump 2, a fourth SR trigger triggering the fault/reset of a direct-current emergency oil pump, a fifth SR trigger triggering the start/stop of the oil pump 1, a sixth SR trigger triggering the start/stop of the oil pump 2, a seventh SR trigger triggering the start/stop of the direct-current emergency oil pump, an eighth SR trigger triggering an availability test of a pump set, a ninth SR trigger triggering the test of the oil pump 1, a tenth SR trigger triggering the test of the oil pump 2, an eleventh SR trigger triggering the test of the emergency oil pump, and a twelfth SR trigger set triggering the reset of an availability test result of the pump set.

The S end of the first RS trigger triggers an oil pump 1 automatic mode, and the R end triggers an oil pump 1 manual mode; and the S end of the second RS trigger triggers the automatic mode of the oil pump 2, and the R end triggers the manual mode of the oil pump 2.

An S-end triggered oil pump 1 of the first SR trigger is in a main pump mode, an oil pump 2 of the first SR trigger is in a slave pump mode, an R-end triggered oil pump 1 of the first SR trigger is in the slave pump mode, and the oil pump 2 of the first SR trigger is in the main pump mode; the S end of the second SR trigger triggers a fault signal of the oil pump 1, and the R end triggers a reset signal of the oil pump 1; the S end of the third SR trigger triggers a fault signal of the oil pump 2, and the R end triggers a reset signal of the oil pump 2; an S end of the fourth SR trigger triggers an accident oil pump fault signal, and an R end triggers an accident oil pump reset signal; the S end of the fifth SR trigger triggers a starting signal of the oil pump 1, and the R end triggers a stopping signal of the oil pump 1; the S end of the sixth SR trigger triggers a starting signal of the oil pump 2, and the R end triggers a stopping signal of the oil pump 2; the S end of the seventh SR trigger triggers an accident oil pump starting signal, and the R end triggers an accident oil pump stopping signal; the S end of the eighth SR trigger triggers a pump set availability test; the S end of the ninth SR trigger triggers a test signal of the oil pump 1, and the R end triggers a test result reset signal of the oil pump 1; the S end of the tenth SR trigger triggers a test signal of the oil pump 2, and the R end triggers a test result reset signal of the oil pump 2; an S end of the eleventh SR trigger triggers an accident oil pump test signal, and an R end triggers an accident oil pump test result reset signal; and the R end of the twelfth SR trigger set triggers a reset signal of the usability test result of the pump set.

The DCS control system judges the running states of the first alternating-current lubricating oil pump, the second alternating-current lubricating oil pump and the direct-current accident oil pump through monitoring the first pressure transmitter, the second pressure transmitter and the third pressure transmitter, judges the oil supply state and the stability of the lubricating oil system through monitoring the system main pipe pressure transmitter, and judges the state of lubricating oil in the oil tank and the starting and stopping states of the lubricating oil system through monitoring the temperature measuring thermal resistor and the liquid level transmitter.

The DCS control system respectively controls the first alternating-current lubricating oil pump, the second alternating-current lubricating oil pump, the direct-current accident oil pump and the oil tank heater through the motor control center.

The DCS control system controls automatic and manual control mode switching, automatic and manual start-stop mode switching, fault indication and fault resetting, master-slave pump mode switching and automatic pump availability tests of the first alternating-current lubricating oil pump; controlling automatic and manual control mode switching, automatic and manual start-stop mode switching, fault indication and fault resetting, master-slave pump mode switching and automatic pump availability testing of a second alternating-current lubricating oil pump; controlling fault indication and fault reset of the direct-current accident oil pump and an automatic pump availability test; and controlling automatic and manual control mode switching, fault indication and fault resetting of the oil tank heater.

The DCS control system controls the automatic pump availability test of the oil pump to be executed in a fixed periodic mode. The first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump are automatically locked into automatic states in the usability test process of the automatic pump, and the states are released after the test is finished.

The automatic pump availability test sends the test result of the test pump to the upper computer after the test is finished, and if the fault is detected, the alarm prompts the operator to pay attention. After the availability test of the automatic pump is finished, the running states of the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump can be controlled to be switched, and alternate running is achieved.

By adopting the technology, the utility model has the advantages that: the DCS control system is subjected to complex and tedious state definition and logic optimization, and the automatic operation mode setting of the oil supply equipment is provided, so that the one-key start-stop control of the turbine lubricating oil equipment is met, a regular online usability test control scheme of the lubricating oil pump is added, a test result is output, and operators can be reminded to pay attention and make a maintenance plan in advance. The manual mode and the automatic mode of the oil supply equipment can be switched at will, the manual mode has more functions of manually controlling the starting and the stopping of the equipment when the equipment fails, and the safety of the equipment is guaranteed to the maximum extent. The regular online test can be automatically operated in a program without manual intervention. The standby lubricating oil pump and the direct-current accident oil pump can be automatically started and stopped in the whole process, and the test result is fed back, so that the normal operation of the steam turbine is guaranteed, the operation intensity of monitoring the operation panel by operators is reduced, and the availability and reliability of equipment and the operation safety of the steam turbine are enhanced.

The reliable and stable turbine lubricating oil supply system and the control method can reduce the factors to the maximum extent, namely, the unreliable factors of the lubricating oil pump and the control circuit aging cause the oil pump to be incapable of being started normally, the direct current screen is powered off or the control circuit is failed to be found out as early as possible, misoperation of operators is prevented, control is more intelligent, and the monitoring load of operation and maintenance personnel is reduced.

Drawings

FIG. 1 is a control schematic diagram of a control apparatus according to the present invention;

FIG. 2 is a connection diagram of a lubrication system in the control apparatus of the present invention;

FIG. 3 is a control process of the DCS control system of the present invention for an automatic pump availability test;

FIGS. 4-11 are control logic diagrams of the control device of the present invention;

in the figure: 1-a first ac lube pump; 2-a second alternating-current lubricating oil pump; 3-a direct current emergency oil pump; 4-an oil tank; 5-a first pressure transmitter; 6-a second pressure transmitter; 7-a third pressure transmitter; 8-a heater; 9-temperature measuring thermal resistance; 10-a liquid level transmitter; and 11, a system main pipe pressure transmitter.

Detailed Description

The utility model is described in further detail below with reference to the drawings and specific embodiments.

As shown in fig. 1-3, the control device of the turbine lubricating oil system includes a DCS control system and a motor control center electrically connected to the DCS control system.

The lubricating oil system of steam turbine contains oil tank 4, first ac lubricating oil pump 1, second ac lubricating oil pump 2, direct current accident oil pump 3, still including installing in the first pressure transmitter 5 of first ac lubricating oil pump export, install in the second pressure transmitter 6 of second ac lubricating oil pump export, install in the third pressure transmitter 7 of direct current accident oil pump export and install in the system mother pipe pressure transmitter 11 in the female pipe of lubricating oil system, system mother pipe pressure transmitter 11 is including three single pressure transmitter who installs in proper order in the mother pipe pipeline. In addition, the oil tank 4 is also provided with a heater 8, a liquid level transmitter 10, a temperature measuring thermal resistor 9, and corresponding oil supply and return pipelines and accessories. For the sake of brevity and clarity of description, the first ac lubricating oil pump is also denoted by "oil pump 1", and the second ac lubricating oil pump is also denoted by "oil pump 2".

The motor control center controls and is electrically connected with a first alternating-current lubricating oil pump 1, a second alternating-current lubricating oil pump 2, a direct-current accident oil pump 3 and a heater 8 in a lubricating oil system, and the motor control center controls the on-off of a power supply of the heater. DCS control system electricity is connected with first pressure transmitter 5, second pressure transmitter 6, third pressure transmitter 7, the female pipe pressure transmitter 11 of system, temperature measurement thermal resistance 9 and level transmitter 10. The DCS control system is connected with a power supply and is also connected with an upper computer through a data connecting line.

DCS control system includes input fastener, output fastener and control operation's CPU fastener, and the input fastener includes analog input's AI fastener, switching value input's DI fastener and thermal resistance input's RTD fastener, and the output fastener includes analog output's AO fastener and switching value output's DO fastener. AI fastener, DI fastener and RTD fastener gather on-the-spot pressure, switching value and temperature signal input to the CPU fastener, the CPU fastener passes through DO fastener output signal with real-time operation result, and conveys to the motor control center, and the motor control center passes through the relay according to output signal's instruction and opens or close each oil pump and heater equipment, realizes the automated control to oil pump and heater.

The motor control center comprises a relay for controlling the start/stop of the oil pump and the heater, an oil pump and heater operation feedback relay, an oil pump and heater fault relay and an oil pump local control cabinet.

The oil pump and heater start/stop relay is provided with an oil pump 1 start contact, an oil pump 2 start contact, an accident oil pump start contact, a heater start contact, an oil pump 1 stop contact, an oil pump 2 stop contact, an accident oil pump stop contact, and a heater stop contact.

The oil pump and heater operation feedback relay is provided with an oil pump 1 operation feedback contact, an oil pump 2 operation feedback contact, an accident oil pump operation feedback contact and a heater operation feedback contact.

The oil pump and heater fault relay is provided with an oil pump 1MCC fault contact, an oil pump 2MCC fault contact, an accident oil pump MCC fault contact and a heater MCC fault contact.

The oil pump local control cabinet is provided with an oil pump 1 local/remote change-over switch, an oil pump 2 local/remote change-over switch, an accident oil pump local/remote change-over switch and a heater local/remote change-over switch.

The upper computer 14 comprises a soft operation button, an RS trigger, an SR trigger, a TON1 time delay trigger block, a TOFF1 time delay stop block and a TP function block.

The soft operation button comprises a one-key starting button, an oil pump 1 manual-automatic switching button, an oil pump 2 manual-automatic switching button, a main pump mode button for the oil pump 1, a main pump mode button for the oil pump 2, an oil pump 1 fault reset button, an oil pump 2 fault reset button, an accident oil pump fault reset button, a pump availability test input button, an oil pump 1 starting button, an oil pump 1 stopping button, an oil pump 2 starting button, an oil pump 2 stopping button, an accident oil pump starting button, an accident oil pump stopping button and a pump set availability test button.

The RS triggers comprise a first RS trigger for triggering the automatic/manual mode of the oil pump 1 and a second RS trigger for triggering the automatic/manual mode of the oil pump 2.

The SR triggers comprise a first SR trigger for triggering a main pump/slave pump mode of the oil pump, a second SR trigger for triggering the fault/reset of the oil pump 1, a third SR trigger for triggering the fault/reset of the oil pump 2, a fourth SR trigger for triggering the fault/reset of the direct-current accident oil pump, a fifth SR trigger for triggering the start/stop of the oil pump 1, a sixth SR trigger for triggering the start/stop of the oil pump 2, a seventh SR trigger for triggering the start/stop of the direct-current accident oil pump, an eighth SR trigger for triggering an availability test of the pump group, a ninth SR trigger for triggering the test of the oil pump 1, a tenth SR trigger for triggering the test of the oil pump 2, an eleventh SR trigger for triggering the accident oil pump test, and a twelfth SR trigger group for triggering the reset of an availability test result of the pump group.

The S end of the first RS trigger triggers an oil pump 1 automatic mode, and the R end triggers an oil pump 1 manual mode; the S end of the second RS trigger triggers an oil pump 2 automatic mode, and the R end triggers an oil pump 2 manual mode.

An S-end trigger oil pump 1 of the first SR trigger is in a main pump mode, an oil pump 2 of the first SR trigger is in a slave pump mode, an R-end trigger oil pump 1 of the first SR trigger is in a slave pump mode, and the oil pump 2 of the first SR trigger is in a main pump mode; the S end of the second SR trigger triggers a fault signal of the oil pump 1, and the R end triggers a reset signal of the oil pump 1; the S end of the third SR trigger triggers a fault signal of the oil pump 2, and the R end triggers a reset signal of the oil pump 2; an S end of a fourth SR trigger triggers an accident oil pump fault signal, and an R end triggers an accident oil pump reset signal; the S end of the fifth SR trigger triggers a starting signal of the oil pump 1, and the R end triggers a stopping signal of the oil pump 1; the S end of the sixth SR trigger triggers a starting signal of the oil pump 2, and the R end triggers a stopping signal of the oil pump 2; the S end of the seventh SR trigger triggers an accident oil pump starting signal, and the R end triggers an accident oil pump stopping signal; triggering an availability test of an oil pump set by the S end of the eighth SR trigger; an S end of the ninth SR trigger triggers a test signal of the oil pump 1, and an R end triggers a test result reset signal of the oil pump 1; the S end of the tenth SR trigger triggers a test signal of the oil pump 2, and the R end triggers a test result reset signal of the oil pump 2; an S end of the eleventh SR trigger triggers an accident oil pump test signal, and an R end triggers an accident oil pump test result reset signal; and the R end of the twelfth SR trigger group triggers a pump availability test result reset signal.

Specifically, the DCS control system switches the automatic control mode and the manual control mode of the first alternating-current lubricating oil pump by clicking a manual-automatic switching button of the oil pump 1 arranged in the upper computer, and in the CPU clamping piece, a switching signal enables the S end of the first RS trigger to trigger the automatic mode of the oil pump 1. When the manual-automatic switching button of the oil pump 1 arranged in the upper computer is clicked again, the switching signal enables the R end of the first RS trigger to trigger the manual mode of the oil pump 1.

In addition, when a lubricating oil system starting instruction reaches the CPU card, the S end of the first RS trigger triggers the automatic mode of the oil pump 1.

When a fault signal of the oil pump 1 is transmitted to the CPU card, the R end of the first RS trigger triggers a manual mode of the oil pump 1.

The DCS control system controls the automatic and manual control mode switching of the second alternating-current lubricating oil pump by clicking a manual and automatic switching button of the oil pump 2 arranged in the upper computer, and in the CPU clamping piece, a switching signal enables the S end of the second RS trigger to trigger the automatic mode of the oil pump 2. When the manual-automatic switching button of the oil pump 2 arranged in the upper computer is clicked again, the switching signal enables the R end of the second RS trigger to trigger the manual mode of the oil pump 2.

In addition, when a lubricating oil system starting command reaches the CPU card, the S end of the second RS trigger triggers the automatic mode of the oil pump 2.

When the fault signal of the oil pump 2 is transmitted to the CPU clamping piece, the R end of the second RS trigger triggers the manual mode of the oil pump 2.

The first and second AC lubricating oil pumps are in a one-use-one-standby state in operation. The DCS control system switches the main pump mode and the slave pump mode of the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump by designing the following logics:

when a CPU card in the DCS control system receives a fault signal of the oil pump 1, the CPU card enables an R end of a first SR trigger in an upper computer to trigger the oil pump 1 to be in a slave pump mode, and the oil pump 2 is in a master pump mode. Namely, the oil pump 1 is automatically switched to a slave pump mode when the oil pump fails, and the oil pump 2 is automatically switched to a main pump mode at the same time;

when a CPU card in the DCS receives a fault signal of an oil pump 2, the CPU card enables an S end of a first SR trigger in an upper computer to trigger the oil pump 1 to be in a main pump mode and the oil pump 2 to be in a slave pump mode, namely, the oil pump 2 is automatically switched to the slave pump mode when the oil pump 2 fails, and meanwhile, the oil pump 1 is automatically switched to the main pump mode;

when the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump are not in fault and other conditions are met, clicking an oil pump 1 in an upper computer to switch to a main pump mode button, so that the oil pump 1 is changed into a main pump mode, and the oil pump 2 is automatically changed into a slave pump mode; clicking the oil pump 2 to switch to the main pump mode button changes the oil pump 2 to the main pump mode, and the oil pump 1 automatically changes to the slave pump mode.

The DCS control system controls the fault and reset of the first alternating-current lubricating oil pump through definition of the fault of the oil pump 1 and a fault reset button of the oil pump 1.

When the oil pump 1 has MCC fault, the fault contact of the oil pump 1MCC in the oil pump of the motor control center and the heater fault relay is closed, a closing signal is transmitted to the CPU clamping piece through the DI clamping piece in the DCS control system, and in the CPU clamping piece, the signal enables the S end of the second SR trigger to trigger the fault signal of the oil pump 1.

When an oil pump 1 local/remote change-over switch on the oil pump local control cabinet is driven to a remote position, a starting contact of the oil pump 1 in an oil pump and heater starting/stopping relay of a motor control center is closed, and the starting of the oil pump 1 is indicated. The closing signal is transmitted to the CPU clamping piece through a DI clamping piece in the DCS control system, if an oil pump 1 operation feedback contact in an oil pump of a motor control center and a heater operation feedback relay in 5S is not closed, the signal which is not closed is transmitted to the CPU clamping piece through the DI clamping piece, and the S end of the second SR trigger triggers a fault signal of the oil pump 1.

As an alternative arrangement, when the oil pump 1 has another fault, the S terminal of the second SR trigger triggers a fault signal of the oil pump 1.

After the fault of the oil pump 1 is relieved, a fault reset button of the oil pump 1 arranged on the upper computer is manually operated, or a key start button arranged on the upper computer is used for sending a starting signal of a lubricating oil system to the CPU clamping piece, and the R end of the second SR trigger triggers a reset signal of the oil pump 1 automatically.

The DCS control system controls the fault and reset of the second alternating-current lubricating oil pump through the definition of the fault of the oil pump 2 and a fault reset button of the oil pump 2.

When the oil pump 2 has an MCC fault, an oil pump 2MCC fault contact in an oil pump and heater fault relay of a motor control center is closed, a closing signal is transmitted to a CPU (central processing unit) card piece through a DI (digital interface) card piece in a DCS (distributed control system), and in the CPU card piece, the signal enables the S end of the third SR trigger to trigger a fault signal of the oil pump 2.

When the local/remote change-over switch of the oil pump 2 on the local control cabinet of the oil pump is driven to a remote position, the starting contact of the oil pump 2 in the starting/stopping relay of the oil pump and the heater of the motor control center is closed, which indicates that the oil pump 2 is started. And if the operation feedback contact of the oil pump 2 in the oil pump of the motor control center and the heater operation feedback relay in 5S is not closed, the non-closed signal is transmitted to the CPU clamping piece through the DI clamping piece, so that the S end of the third SR trigger triggers a fault signal of the oil pump 2.

As an alternative arrangement for other faults of the oil pump 2, when other faults of the oil pump 2 occur, a fault signal of the oil pump 2 is also triggered through the S end of the third SR trigger.

After the fault of the oil pump 2 is relieved, a fault reset button of the oil pump 2 arranged on the upper computer is manually operated, or a key start button arranged on the upper computer is used for sending a starting signal of a lubricating oil system to the CPU clamping piece, and the R end of the third SR trigger triggers a reset signal of the oil pump 2 automatically.

The DCS control system controls the fault and reset of the direct current accident oil pump through the definition of the fault of the accident oil pump and a fault reset button of the accident oil pump.

When the direct current accident oil pump has MCC fault, fault contacts of the accident oil pump MCC in an oil pump of a motor control center and a heater fault relay are closed to trigger an accident oil pump MCC fault signal, the closed signal is transmitted to a CPU (central processing unit) clamping piece through a DI (digital interface) clamping piece in a DCS (distributed control system), and in the CPU clamping piece, the signal enables an S end of a fourth SR (scanning series) trigger to trigger the accident oil pump fault signal.

When an accident oil pump local/remote change-over switch on the oil pump local control cabinet is driven to a remote position, an oil pump of the motor control center and an accident oil pump starting contact in the heater starting/stopping relay are closed, and the starting of the accident oil pump is indicated. And if the operation feedback contact of the accident oil pump in the oil pump of the motor control center and the heater operation feedback relay in 5S is not closed, the signal which is not closed is transmitted to the CPU clamping piece through the DI clamping piece, so that the S end of the fourth SR trigger triggers the fault signal of the accident oil pump.

And other faults of the direct current accident oil pump are set as optional items, and when other faults of the direct current accident oil pump occur, an accident oil pump fault signal is triggered through the S end of the fourth SR trigger.

After the fault of the direct-current accident oil pump is relieved, the fault resetting button of the accident oil pump arranged on the upper computer is manually operated, or the starting button of a key arranged on the upper computer is used for sending a lubricating oil system starting signal to the CPU clamping piece, and the R end of the fourth SR trigger automatically triggers the accident oil pump resetting signal.

The DCS control system controls the manual starting and stopping of the first alternating-current lubricating oil pump through a starting button of the oil pump 1 and a stopping button of the oil pump 1.

When first interchange lubricating oil pump is manual mode, and when not receiving 1 fault signal of oil pump in the DCS control system, the DCS control system passes through AI fastener and RTD fastener and gathers oil tank liquid level and oil temperature signal, when liquid level and oil temperature in the oil tank all satisfy the oil pump start condition of setting for, click 1 start button of oil pump on the host computer, the host computer sends the start signal to fifth SR trigger, trigger 1 start signal of oil pump through the S end of fifth SR trigger, 1 start signal of oil pump transmits to motor control center through the output fastener among the DCS control system, motor control center passes through 1 power of relay switch-on oil pump, and then oil pump 1 starts.

When the first alternating-current lubricating oil pump is in a manual mode, a stop button of the oil pump 1 on the upper computer is clicked, the upper computer sends a stop signal to the fifth SR trigger, the stop signal of the oil pump 1 is triggered through the R end of the fifth SR trigger, the stop signal of the oil pump 1 is transmitted to the motor control center through an output clamping piece in the DCS control system, the motor control center disconnects a power supply of the oil pump 1 through a relay, and then the oil pump 1 stops.

The DCS control system controls the manual start and stop of the second ac lubricating oil pump by means of a start button of the oil pump 2 and a stop button of the oil pump 2.

When the second exchanges the lubricant pump for manual mode, and when not receiving 2 fault signals of oil pump in the DCS control system, the DCS control system passes through AI fastener and RTD fastener and gathers oil tank liquid level and oil temperature signal, when liquid level and oil temperature in the oil tank all satisfy the oil pump start condition of setting for, click 2 start button of oil pump on the host computer, the host computer sends the start signal to the sixth SR trigger, S end through the sixth SR trigger triggers 2 start signal of oil pump, 2 start signal of oil pump transmit to motor control center through the output fastener among the DCS control system, motor control center passes through 2 powers of relay switch-on oil pump, and then oil pump 2 starts.

When the first alternating-current lubricating oil pump is in a manual mode, a stop button of the oil pump 2 on the upper computer is clicked, the upper computer sends a stop signal to the sixth SR trigger, the stop signal of the oil pump 2 is triggered through the R end of the sixth SR trigger, the stop signal of the oil pump 2 is transmitted to the motor control center through an output clamping piece in the DCS, the motor control center disconnects a power supply of the oil pump 2 through a relay, and then the oil pump 2 stops.

The DCS control system controls manual starting and stopping of the direct current accident oil pump through an accident oil pump starting button and an accident oil pump stopping button.

When an accident oil pump fault signal is not received in the DCS, the DCS collects the liquid level and the oil temperature signal of an oil tank through an AI clamping piece and an RTD clamping piece, when the liquid level and the oil temperature in the oil tank meet set oil pump starting conditions, an accident oil pump starting button is clicked on an upper computer, the upper computer sends a starting signal to a seventh SR trigger, an accident oil pump starting signal is triggered through an S end of the seventh SR trigger, the accident oil pump starting signal is transmitted to a motor control center through an output clamping piece in the DCS, the motor control center switches on an accident oil pump power supply through a relay, and then the accident oil pump is started.

When a first pressure transmitter for acquiring AI clamping pieces in the DCS measures that the oil pressure is greater than 0.3MPa, or a second pressure transmitter measures that the oil pressure is greater than 0.3MPa, and a system main pipe pressure transmitter measures that the oil pressure is greater than 0.08MPa, an accident oil pump stop button on an upper computer is clicked, the upper computer sends a stop signal to a seventh SR trigger, an accident oil pump stop signal is triggered through an R end of the seventh SR trigger, the accident oil pump stop signal is transmitted to a motor control center through an output clamping piece in the DCS, the motor control center disconnects an accident oil pump power supply through a relay, and then the accident oil pump stops.

When the turning of the steam turbine stops and the temperature of a cylinder wall temperature measuring point is less than 100 ℃, the steam turbine is in a cold state and is completely static at the moment, an accident oil pump stop button on an upper computer is clicked, the upper computer sends a stop signal to a seventh SR trigger, the R end of the seventh SR trigger triggers an accident oil pump stop signal, the accident oil pump stop signal is transmitted to a motor control center through an output fastener in a DCS control system, the motor control center disconnects a power supply of the accident oil pump through a relay, and then the accident oil pump stops.

The DCS control system controls the automatic starting and stopping of the first alternating-current lubricating oil pump by designing the following logics:

when the steam turbine is in an operating state and a fault signal of the oil pump 1 is not received in the DCS, when the lubricating oil pressure measured by a system main pipe pressure transmitter and acquired by an input clamping piece in the DCS is less than 0.08MPa, the S end of the fifth SR trigger automatically triggers a starting signal of the oil pump 1, the starting signal of the oil pump 1 is transmitted to a motor control center through an output clamping piece in the DCS, the motor control center is connected with a power supply of the oil pump 1 through a relay, and then the first alternating-current lubricating oil pump is automatically started;

when the first alternating-current lubricating oil pump is in an automatic mode and a main pump mode, a fault signal of the oil pump 1 is not received in the DCS control system, and the oil tank liquid level and the oil temperature collected by an input card in the DCS control system meet set oil pump starting conditions, the S end of the fifth SR trigger automatically triggers a starting signal of the oil pump 1, the starting signal of the oil pump 1 is transmitted to a motor control center through the output card in the DCS control system, the motor control center is connected with a power supply of the oil pump 1 through a relay, and then the first alternating-current lubricating oil pump is automatically started;

when the first alternating-current lubricating oil pump is in an automatic mode and a slave pump mode, a fault signal of the oil pump 1 is not received in the DCS control system, the oil pressure of a system main pipe pressure transmitter acquired by an input clamping piece in the DCS control system is less than 0.1MPa, the oil tank liquid level and the oil temperature acquired by the input clamping piece in the DCS control system meet set oil pump starting conditions, an S end of a fifth SR trigger automatically triggers a starting signal of the oil pump 1, the starting signal of the oil pump 1 is transmitted to a motor control center through the output clamping piece in the DCS control system, the motor control center is connected with a power supply of the oil pump 1 through a relay, and then the first alternating-current lubricating oil pump is automatically started;

when the DCS receives a fault signal of the oil pump 1, the R end of the fifth SR trigger automatically triggers a stop signal of the oil pump 1, the stop signal of the oil pump 1 is transmitted to a motor control center through an output clamping piece in the DCS, the motor control center disconnects a power supply of the oil pump 1 through a relay, and then the first alternating-current lubricating oil pump automatically stops;

when the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump are in an automatic mode and the second alternating-current lubricating oil pump is in a main pump mode, after the DCS control system enables the S end of the sixth SR trigger to trigger the starting signal of the oil pump 2, when the oil pressure of the second pressure transmitter collected by the input clamping piece in the DCS control system is larger than 0.3MPa, the R end of the fifth SR trigger automatically triggers the stop signal of the oil pump 1, and then the first alternating-current lubricating oil pump automatically stops.

The DCS control system controls the automatic starting and stopping of the second alternating-current lubricating oil pump by designing the following logics:

when the steam turbine is in an operating state and a fault signal of the oil pump 2 is not received in the DCS control system, when the lubricating oil pressure measured by a system main pipe pressure transmitter acquired by an input clamping piece in the DCS control system is less than 0.08MPa, the S end of the sixth SR trigger automatically triggers a starting signal of the oil pump 2, the starting signal of the oil pump 2 is transmitted to a motor control center through an output clamping piece in the DCS control system, the motor control center is connected with a power supply of the oil pump 2 through a relay, and then the second alternating-current lubricating oil pump is automatically started;

when the second alternating-current lubricating oil pump is in an automatic mode and a main pump mode, a fault signal of the oil pump 2 is not received in the DCS control system, and the liquid level and the oil temperature of an oil tank collected by an input card in the DCS control system meet set oil pump starting conditions, the S end of the sixth SR trigger automatically triggers a starting signal of the oil pump 2, the starting signal of the oil pump 2 is transmitted to a motor control center through the output card in the DCS control system, the motor control center is connected with a power supply of the oil pump 2 through a relay, and then the second alternating-current lubricating oil pump is automatically started;

when the second alternating-current lubricating oil pump is in an automatic mode and is in a slave pump mode, meanwhile, a fault signal of the oil pump 2 is not received in the DCS control system, the oil pressure of a system main pipe pressure transmitter collected by an input clamping piece in the DCS control system is less than 0.1MPa, the oil tank liquid level and the oil temperature collected by the input clamping piece in the DCS control system meet set oil pump starting conditions, the S end of the sixth SR trigger automatically triggers a starting signal of the oil pump 2, the starting signal of the oil pump 2 is transmitted to the motor control center through the output clamping piece in the DCS control system, the motor control center is connected with a power supply of the oil pump 2 through a relay, and then the second alternating-current lubricating oil pump is automatically started;

when the DCS receives a fault signal of the oil pump 2, the R end of the sixth SR trigger automatically triggers a stop signal of the oil pump 2, the stop signal of the oil pump 2 is transmitted to the motor control center through an output clamping piece in the DCS, the motor control center disconnects a power supply of the oil pump 2, and then the second alternating-current lubricating oil pump automatically stops;

when the first and second alternating-current lubricating oil pumps are in an automatic mode and the first alternating-current lubricating oil pump is in a main pump mode, after the DCS control system enables the S end of the fifth RS trigger to trigger the starting signal of the oil pump 1, and when the oil pressure of the first pressure transmitter collected by the input clamping piece in the DCS control system is larger than 0.3MPa, the R end of the sixth SR trigger automatically triggers the stop signal of the oil pump 2, and then the second alternating-current lubricating oil pump automatically stops.

The DCS control system controls the automatic starting and stopping of the direct current accident oil pump by designing the following logics:

when the steam turbine is not in a cold state and is in a complete static state, an accident oil pump fault signal is not received in the DCS control system, and the lubricating oil pressure measured by a system main pipe pressure transmitter acquired by an input clamping piece in the DCS control system is less than 0.08MPa, at the moment, an S end of a seventh SR trigger automatically triggers an accident oil pump starting signal, the accident oil pump starting signal is transmitted to a motor control center through an output clamping piece in the DCS control system, the motor control center is connected with an accident oil pump power supply through a relay, and then a direct-current accident oil pump is automatically started;

when the steam turbine is not in a cold state and is in a complete static state, an accident oil pump fault signal is not received in the DCS control system, the lubricating oil pressure measured by a first pressure transmitter and acquired by an input module in the DCS control system is less than 0.3MPa, the lubricating oil pressure measured by a second pressure transmitter is less than 0.3MPa, at the moment, an S end of a seventh SR trigger automatically triggers an accident oil pump starting signal, the accident oil pump starting signal is transmitted to a motor control center through an output clamping piece in the DCS control system, the motor control center is connected with an accident oil pump power supply through a relay, and then the direct-current accident oil pump is automatically started;

when the DCS receives an accident oil pump fault signal, the R end of the seventh SR trigger automatically triggers an accident oil pump stop signal, the accident oil pump stop signal is transmitted to the motor control center through an output clamping piece in the DCS, the motor control center disconnects a power supply of the accident oil pump through a relay, and then the direct-current accident oil pump automatically stops.

The DCS control system controls the pump availability test by designing the following logic:

when the first and second AC lubricating oil pumps are in automatic mode, one of the oil pump 1 operation feedback contact and the oil pump 2 operation feedback contact in an oil pump fault relay of the DCS control system input card acquisition motor control center is in a closed state, the accident oil pump operation feedback contact is not closed, that is, one of the first and second ac lubricating oil pumps is in an operating state, the dc emergency oil pump is not operated, and the collected local/remote change-over switch of the oil pump 1, the local/remote change-over switch of the oil pump 2 and the local/remote change-over switch of the accident oil pump are all turned to a remote position, meanwhile, the collected oil pressure of the system main pipe pressure transmitter is more than 0.1MPa, and when the grid-connected signal contact is closed, the method is characterized in that the pump availability test can be executed only when the liquid level and the oil temperature of an oil tank collected by an input clamping piece of the DCS control system meet the set starting condition of the oil pump. The pump availability test can be performed manually or periodically automatically by a set program;

if the first alternating-current lubricating oil pump is running, after a pump availability test input button on an upper computer is manually clicked, a pump availability test input signal is transmitted to a twelfth SR trigger set through 2s of pulse, and each R end of the twelfth SR trigger set triggers a pump availability test result reset signal, so that the results of the last pump availability test execution success or failure in the DCS are reset and cleared.

Meanwhile, the pump availability test input signal enables the S end of the eighth SR trigger to trigger an oil pump set mode locking signal through 2S of pulse; the oil pump set mode locking signal generates a pump test in-process signal after passing through the TON1 delay trigger block 4 s; the oil pump set mode lock signal disappears after the stop block delay 2s through TOFF 1. The TOFF1 delays the delay signal generated by the stop block and the state of the oil pump 2 operation feedback contact opening, so that the S end of the tenth SR trigger triggers the oil pump 2 test signal. The oil pump 2 test signal and the pump test in-process signal enable the sixth SR trigger S end to automatically trigger the oil pump 2 starting signal, and the second alternating-current lubricating oil pump is started.

Within 10s after the test signal of the oil pump 2 is triggered, when the lubricating oil pressure measured by a second pressure transmitter acquired by an input clamping piece in the DCS control system is greater than 0.3MPa, the test success signal of the oil pump 2 is automatically triggered, and after 5s of delay, the test completion signal of the oil pump 2 is triggered, the test result reset signal of the oil pump 2 is automatically triggered by the R end of the tenth SR trigger set through the test completion signal of the oil pump 2, the test result reset signal of the oil pump 2 enables the R end of the sixth SR trigger to automatically trigger the stop signal of the oil pump 2, and then the second alternating-current lubricating oil pump automatically stops running.

Within 10s after the test signal of the oil pump 2 is triggered, when the lubricating oil pressure measured by a second pressure transmitter acquired by an input clamping piece in the DCS control system is less than 0.3MPa, the test failure signal of the oil pump 2 is automatically triggered, and after 5s of delay, the test completion signal of the oil pump 2 is triggered, the test result reset signal of the oil pump 2 is automatically triggered by the R end of the tenth SR trigger set through the test completion signal of the oil pump 2, the test result reset signal of the oil pump 2 enables the R end of the sixth SR trigger to automatically trigger the stop signal of the oil pump 2, and then the second alternating-current lubricating oil pump automatically stops running.

After the second alternating-current lubricating oil pump test is completed, the oil pump 2 test completion signal is delayed by 5S, so that the S end of the eleventh SR trigger automatically triggers an accident oil pump test signal. And the accident oil pump test signal and the pump test ongoing signal enable the S end of the seventh SR trigger to automatically trigger the accident oil pump starting signal, so that the direct-current accident oil pump is automatically started.

Within 10s after the starting of the accident oil pump test signal, when the lubricating oil pressure measured by a third pressure transmitter acquired by an input clamping piece in a DCS control system is greater than 0.06MPa, automatically triggering an accident oil pump test success signal, delaying for 5s, triggering an accident oil pump test completion signal, automatically triggering an accident oil pump test result reset signal through an R end of an eleventh SR trigger group, and automatically triggering an accident oil pump stop signal through an R end of a seventh SR trigger so as to automatically stop the operation of the direct-current accident oil pump.

Within 10s after the starting of the accident oil pump test signal, when the lubricating oil pressure measured by a third pressure transmitter acquired by an input clamping piece in a DCS control system is less than 0.06MPa, an accident oil pump test failure signal is automatically triggered, after 5s of delay, an accident oil pump test completion signal is triggered, the accident oil pump test completion signal automatically triggers an accident oil pump test result reset signal through the R end of an eleventh SR trigger set, and the accident oil pump test result reset signal automatically triggers an accident oil pump stop signal through the R end of a seventh SR trigger set, so that the direct-current accident oil pump automatically stops running. This is the complete process of the pump usability test when the first ac lube pump is running.

If the second alternating-current lubricating oil pump is running, after a pump availability test input button on the upper computer is manually clicked, a pump availability test input signal is transmitted to a twelfth SR trigger set through 2s of pulses, and each R end of the twelfth SR trigger set triggers a pump availability test result reset signal, so that the results of the last pump availability test execution success or failure in the DCS are reset and cleared.

Meanwhile, the pump availability test input signal enables the S end of the eighth SR trigger to trigger an oil pump set mode locking signal through 2S of pulse; the oil pump set mode locking signal generates a pump test in-process signal after passing through the TON1 delay trigger block 4 s; the oil pump set mode lock signal disappears after the stop block delay 2s through TOFF 1. The time delay signal generated by the TOFF1 time delay stop block and the state that the oil pump 1 operation feedback contact is disconnected enable the S end of the ninth SR trigger to trigger the oil pump 1 test signal. The oil pump 1 test signal and the pump test in-process signal enable the fifth SR trigger S end to automatically trigger the oil pump 1 starting signal, and the first alternating-current lubricating oil pump is started.

Within 10s after the test signal of the oil pump 1 is triggered, when the lubricating oil pressure measured by a first pressure transmitter acquired by an input clamping piece in a DCS control system is greater than 0.3MPa, the test success signal of the oil pump 1 is automatically triggered, and after 5s of delay, the test completion signal of the oil pump 1 is triggered, the test result reset signal of the oil pump 1 is automatically triggered by the R end of a ninth SR trigger through the test completion signal of the oil pump 1, the test result reset signal of the oil pump 1 enables the R end of the fifth SR trigger to automatically trigger the stop signal of the oil pump 1, and then the first alternating-current lubricating oil pump automatically stops running.

Within 10s after the test signal of the oil pump 1 is triggered, when the lubricating oil pressure measured by a first pressure transmitter acquired by an input clamping piece in the DCS control system is less than 0.3MPa, the test failure signal of the oil pump 1 is automatically triggered, and after 5s of delay, the test completion signal of the oil pump 1 is triggered, the test result reset signal of the oil pump 1 is automatically triggered through the R end of the ninth SR trigger group, the test result reset signal of the oil pump 1 enables the R end of the fifth SR trigger to automatically trigger the stop signal of the oil pump 1, and then the first alternating-current lubricating oil pump automatically stops running.

After the first alternating-current lubricating oil pump test is completed, the oil pump 1 test completion signal is delayed by 5S, so that the S end of the eleventh SR trigger automatically triggers an accident oil pump test signal. And the accident oil pump test signal and the pump test ongoing signal enable the S end of the seventh SR trigger to automatically trigger the accident oil pump starting signal, so that the direct-current accident oil pump is automatically started.

Within 10s after the starting of the accident oil pump test signal, when the lubricating oil pressure measured by a third pressure transmitter acquired by an input clamping piece in a DCS control system is greater than 0.06MPa, automatically triggering an accident oil pump test success signal, delaying for 5s, triggering an accident oil pump test completion signal, automatically triggering an accident oil pump test result reset signal through an R end of an eleventh SR trigger group, and automatically triggering an accident oil pump stop signal through an R end of a seventh SR trigger so as to automatically stop the operation of the direct-current accident oil pump.

When the lubricating oil pressure measured by a third pressure transmitter and acquired by an input clamping piece in a DCS control system is less than 0.06MPa within 10s after the starting of an accident oil pump test signal, an accident oil pump test failure signal is automatically triggered, after 5s of delay, an accident oil pump test completion signal is triggered, the accident oil pump test completion signal automatically triggers an accident oil pump test result reset signal through the R end of an eleventh SR trigger set, and the accident oil pump test result reset signal automatically triggers an accident oil pump stop signal through the R end of a seventh SR trigger set, so that the direct-current accident oil pump automatically stops running. This is the complete process of the pump usability test when the second ac lube pump is running.

When the DCS control system receives a successful test signal of the oil pump 2 or a successful test signal of the oil pump 1 and receives a successful test signal of the accident oil pump, an availability test success signal of the pump set is automatically triggered; when the DCS receives a test failure signal of the oil pump 2 or a test failure signal of the oil pump 1 or a test failure signal of an accident oil pump, an availability test failure signal of the pump set is automatically triggered.

And after the test is finished, the pump set availability test sends the test result of the test pump to the upper computer, and if the fault is detected, the alarm is given out to prompt operating personnel to pay attention. After the availability test of the automatic pump is finished, the running states of the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump can be controlled to be switched, and alternate running is achieved.

The DCS control system controls the periodic pump availability test through the TP functional block.

The DCS control system connects the output terminal of the eighth SR flip-flop to a "delay time for retest" TP function block, and takes the delay time thereof as an input condition for the pump availability test, in this embodiment, the delay time of the TP function block is set to 7 days, thereby realizing an automatic test cycle of 7 days.

Furthermore, in order to avoid interference of human factors and the like in the process of pump availability test, the DCS control system is realized by locking and controlling the mode of the oil pump set. When the pump availability test is started, an oil pump mode locking signal is sent from the output end of the eighth SR trigger, and the signal locks the R and S ends of the first RS trigger, the R and S ends of the second RS trigger and the S and R ends of the first SR trigger, so that the output ends of the first RS trigger, the second RS trigger and the first SR trigger are kept, namely the first AC lubricating oil pump automatic mode, the second AC lubricating oil pump automatic mode, the main pump mode and the slave pump mode are kept unchanged.

Optionally, after the available test of pump, the operation is switched to first interchange lubricated oil pump and second interchange lubricated oil pump, and DCS control system switches the control of operation to first interchange lubricated oil pump and second interchange lubricated oil pump, and oil pump 1, oil pump 2 through the manual operation host computer cut for the main pump mode button or through predetermineeing the output that experimental completion back pump cutting instruction automatic control first SR trigger realized. The main pump mode and the slave pump mode of the first alternating-current lubricating oil pump and the second alternating-current lubricating oil pump are switched, so that the purposes that the running pumps stop and the static pumps run and the two pumps run alternately are further achieved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention by equally replacing or changing the technical idea of the present invention within the technical scope of the present invention.

Claims (5)

1. A control device of a turbine lubricating oil system is characterized in that: including DCS control system and with the electromechanical control center of DCS control system electricity even, electromechanical control center control and electricity are connected with first interchange lubricant pump (1), second interchange lubricant pump (2), direct current accident oil pump (3) and heater (8) in the lubricant system, the DCS control system electricity is connected with first pressure transmitter (5), second pressure transmitter (6), third pressure transmitter (7), the female pipe pressure transmitter of system (11), temperature measurement thermal resistance (9) and liquid level transmitter (10), the DCS control system still is connected with the host computer through data connection line.

2. The control apparatus for a turbine lubricating oil system according to claim 1, characterized in that: first pressure transmitter (5) are installed in the outlet pipeline of first interchange lubricated oil pump (1), second pressure transmitter (6) are installed in the outlet pipeline of second interchange lubricated oil pump (2), third pressure transmitter (7) are installed in the outlet pipeline of direct current accident oil pump (3), system's female pipe pressure transmitter (11) are installed in lubricating oil system's female pipe way, system's female pipe pressure transmitter (11) are including three single pressure transmitter who installs in proper order in female pipe way, heater (8), temperature measurement thermal resistance (9) and liquid level transmitter (10) are installed in oil tank (4) of lubricating oil system.

3. The control apparatus for a turbine lubricating oil system according to claim 1, characterized in that: the DCS control system comprises an AI clamping piece for analog quantity input, a DI clamping piece for switching quantity input, an RTD clamping piece for thermal resistance input and a CPU clamping piece for control operation, and further comprises an AO clamping piece for analog quantity output and a DO clamping piece for switching quantity output, wherein the AI clamping piece, the DI clamping piece and the RTD clamping piece collect pressure, switching quantity and temperature signals on site and input the pressure, the switching quantity and the temperature signals to the CPU clamping piece, the CPU clamping piece outputs the real-time operation result through the DO clamping piece and transmits the real-time operation result to a motor control center, and the motor control center opens or closes each oil pump and heater equipment through a relay according to the instruction of the output signal.

4. The control apparatus for a turbine lubricating oil system according to claim 1, characterized in that: the motor control center comprises a relay for controlling the start/stop of the oil pump and the heater, an oil pump and heater operation feedback relay, an oil pump and heater fault relay and an oil pump local control cabinet;

the starting/stopping relay of the oil pump and the heater is provided with an oil pump 1 starting contact, an oil pump 2 starting contact, an accident oil pump starting contact, a heater starting contact, an oil pump 1 stopping contact, an oil pump 2 stopping contact, an accident oil pump stopping contact and a heater stopping contact;

the oil pump and heater operation feedback relay is provided with an oil pump 1 operation feedback contact, an oil pump 2 operation feedback contact, an accident oil pump operation feedback contact and a heater operation feedback contact;

the fault relay of the oil pump and the heater is provided with an oil pump 1MCC fault contact, an oil pump 2MCC fault contact, an accident oil pump MCC fault contact and a heater MCC fault contact;

the oil pump local control cabinet is provided with an oil pump 1 local/remote change-over switch, an oil pump 2 local/remote change-over switch, an accident oil pump local/remote change-over switch and a heater local/remote change-over switch.

5. The control apparatus for a turbine lubricating oil system according to claim 1, characterized in that: the upper computer comprises a soft operation button, an RS trigger, an SR trigger, a TON1 delay trigger block, a TOFF1 delay stop block and a TP function block;

the soft operation buttons comprise a one-key starting button, an oil pump 1 manual-automatic switching button, an oil pump 2 manual-automatic switching button, an oil pump 1 switching main pump mode button, an oil pump 2 switching main pump mode button, an oil pump 1 fault reset button, an oil pump 2 fault reset button, an accident oil pump fault reset button, a pump availability test input button, an oil pump 1 starting button, an oil pump 1 stopping button, an oil pump 2 starting button, an oil pump 2 stopping button, an accident oil pump starting button, an accident oil pump stopping button and a pump set availability test button;

the RS triggers comprise a first RS trigger for triggering an automatic/manual mode of the oil pump 1 and a second RS trigger for triggering an automatic/manual mode of the oil pump 2;

the SR trigger comprises a first SR trigger triggering a main pump/slave pump mode of an oil pump, a second SR trigger triggering the fault/reset of the oil pump 1, a third SR trigger triggering the fault/reset of the oil pump 2, a fourth SR trigger triggering the fault/reset of a direct-current emergency oil pump, a fifth SR trigger triggering the start/stop of the oil pump 1, a sixth SR trigger triggering the start/stop of the oil pump 2, a seventh SR trigger triggering the start/stop of the direct-current emergency oil pump, an eighth SR trigger triggering an availability test of a pump set, a ninth SR trigger triggering the test of the oil pump 1, a tenth SR trigger triggering the test of the oil pump 2, an eleventh SR trigger triggering the test of the emergency oil pump, and a twelfth SR trigger set triggering the reset of an availability test result of the pump set;

the S end of the first RS trigger triggers an oil pump 1 automatic mode, and the R end triggers an oil pump 1 manual mode; the S end of the second RS trigger triggers an oil pump 2 automatic mode, and the R end triggers an oil pump 2 manual mode;

the S-end triggering oil pump 1 of the first SR trigger is in a main pump mode, the oil pump 2 is in a slave pump mode, the R-end triggering oil pump 1 is in a slave pump mode, and the oil pump 2 is in a main pump mode; the S end of the second SR trigger triggers a fault signal of the oil pump 1, and the R end triggers a reset signal of the oil pump 1; the S end of the third SR trigger triggers a fault signal of the oil pump 2, and the R end triggers a reset signal of the oil pump 2; an S end of the fourth SR trigger triggers an accident oil pump fault signal, and an R end triggers an accident oil pump reset signal; the S end of the fifth SR trigger triggers a starting signal of the oil pump 1, and the R end triggers a stopping signal of the oil pump 1; the S end of the sixth SR trigger triggers a starting signal of the oil pump 2, and the R end triggers a stopping signal of the oil pump 2; the S end of the seventh SR trigger triggers an accident oil pump starting signal, and the R end triggers an accident oil pump stopping signal; the S end of the eighth SR trigger triggers an oil pump set availability test; the S end of the ninth SR trigger triggers a test signal of the oil pump 1; the S end of the tenth SR trigger triggers a test signal of the oil pump 2; triggering an accident oil pump test signal by the S end of the eleventh SR trigger; and the R end of the twelfth SR trigger set triggers a reset signal of the usability test result of the pump set.

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