Hydraulic system self-starting enabling control method, device and equipment for hydroelectric power station governor

Abstract

The application discloses a kind of hydroelectric station governor hydraulic system self-starting enable control method, device and equipment, the method is based on computer monitoring system, monitoring system automatically acquires unit state, unit speed, unit guide vane servomotor lock spindle position, governor pressure tank pressure and oil level etc.Parameter, in unit LCU setting governor hydraulic system self-starting enable control program, in the case where governor hydraulic system self-starting enable function is automatically put into, program is according to preset logic, condition and fixed value, real-time control spare unit governor pressure tank pressure and oil level in normal range, ensure that unit is in normal standby state at any time.The application can real-time control spare unit governor pressure tank pressure and oil level in normal range, without human intervention.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydroelectric station governor, and particularly relates to a self-enabling control method, device and equipment for a hydroelectric station governor hydraulic system. BACKGROUND

[0002] The hydroelectric station governor is an important component of the water turbine and a key part for realizing the water turbine regulation. The governor generally comprises an electrical control part and a hydraulic system part. The hydraulic system part generally comprises a booster pump, a pressure tank, an oil return tank, an isolation valve, a main pressure distribution valve, a guide vane section closing device, an energizer and its lock pin, and a hydraulic system control valve group. In the state of the hydroelectric station unit shutdown, the governor hydraulic system is shut down, and the isolation valve is closed, but the pressure and oil level of the pressure tank still need to be maintained at a normal level to ensure that the unit can be put into operation at any time. In the actual production process, in the state of the unit shutdown, although the governor hydraulic system has been shut down and the isolation valve has been closed, oil and gas leakage will inevitably occur in the valves and pipelines connected to the pressure tank, so the pressure and oil level of the pressure tank will gradually decrease. The longer the standby time of the unit, the more the pressure and oil level of the pressure tank will decrease. When the pressure and oil level decrease to a certain extent, the unit will be affected by the starting conditions. If the pressure and oil level are not adjusted to the normal range in time, the standby function of the unit will be lost. SUMMARY

[0003] The present application provides a self-enabling control method, device and equipment for a hydroelectric station governor hydraulic system to solve the problem that the pressure and oil level of the pressure tank will gradually decrease in the state of the unit shutdown in the prior art, which may cause the unit to lose the standby function. The present application aims to set a self-enabling control program for the governor hydraulic system in the LCU (local control unit) of the unit to realize real-time control of the pressure and oil level of the pressure tank of the standby unit governor within the normal range without human intervention.

[0004] The technical solution adopted by the present application is to provide a self-enabling control method for a hydroelectric station governor hydraulic system, comprising the following steps:

[0005] When the state of the hydroelectric station unit shutdown, the unit rotation speed less than the shutdown rotation speed, the unit guide vane energizer lock pin put into, the automatic control conditions of the unit LCU satisfied, and the remote control conditions of the unit governor hydraulic system satisfied are monitored, and the self-enabling manual control soft pressure plate of the governor hydraulic system is exited, the self-enabling manual control function of the governor hydraulic system is put into, and the self-enabling function of the governor hydraulic system is automatically put into.

[0006] If the pressure of the governor hydraulic system pressure tank is lower than the self-starting enabling starting pressure setting value and the oil level of the governor hydraulic system pressure tank is lower than the self-starting enabling starting oil level setting value, the self-starting enabling function of the governor hydraulic system is started, the governor hydraulic system is started, and the pressure and the oil level of the governor hydraulic system pressure tank are restored to the normal range.

[0007] Further, the application further comprises:

[0008] When the conditions that the water power station unit is in a shutdown state, the unit speed is lower than a shutdown speed setting value, the unit guide vane servo lock pin is put in, the unit LCU automatic control condition is met, and the unit governor hydraulic system remote control condition is met are monitored, the conditions that the unit starting process is started, the unit normal shutdown process is started, and the unit accident shutdown process is started are not met, and the self-starting enabling manual control soft pressure plate of the governor hydraulic system is monitored to be withdrawn, the self-starting enabling manual control function of the governor hydraulic system is put out, and the self-starting enabling function of the governor hydraulic system is automatically put in.

[0009] If one of the conditions that the pressure of the governor hydraulic system pressure tank is higher than the self-starting enabling stopping pressure setting value and the oil level of the governor hydraulic system pressure tank is higher than the self-starting enabling stopping oil level setting value is monitored, and the running time of the governor hydraulic system reaches the self-starting enabling allowed running time setting value, the self-starting enabling function of the governor hydraulic system is stopped, the governor hydraulic system is stopped, and the governor hydraulic system is in a standby state.

[0010] The application further provides a water power station governor hydraulic system self-starting enabling control device, which comprises:

[0011] The first monitoring module is used for monitoring the conditions that the water power station unit is in a shutdown state, the unit speed is lower than a shutdown speed setting value, the unit guide vane servo lock pin is put in, the unit LCU automatic control condition is met, and the unit governor hydraulic system remote control condition is met; and the conditions that the unit governor hydraulic system running state, the unit starting process is started, the unit normal shutdown process is started, and the unit accident shutdown process is started are not met.

[0012] The first execution module is used for putting out the self-starting enabling manual control function of the governor hydraulic system when the first monitoring module monitors that the self-starting enabling manual control soft pressure plate of the governor hydraulic system is withdrawn, and automatically putting in the self-starting enabling function of the governor hydraulic system.

[0013] The first judging module is used for enabling the governor hydraulic system when the pressure of the pressure tank of the governor hydraulic system is lower than the self-starting enabling start pressure setting value and the oil level of the pressure tank of the governor hydraulic system is lower than the self-starting enabling start oil level setting value.

[0014] Further, the application further comprises:

[0015] The second executing module is used for monitoring the conditions that the water power station unit is in a shutdown state, the unit rotation speed is lower than the shutdown rotation speed setting value, the unit guide vane servomotor lock pin is put in, the unit LCU automatic control condition is met, and the unit governor hydraulic system remote control condition is met.

[0016] The second executing module is used for enabling the governor hydraulic system when the pressure of the pressure tank of the governor hydraulic system is lower than the self-starting enabling start pressure setting value and the oil level of the pressure tank of the governor hydraulic system is lower than the self-starting enabling start oil level setting value.

[0017] The second judging module is used for stopping the governor hydraulic system when the pressure of the pressure tank of the governor hydraulic system is higher than the self-starting enabling stop pressure setting value, the oil level of the pressure tank of the governor hydraulic system is higher than the self-starting enabling stop oil level setting value, and the governor hydraulic system running time reaches the self-starting enabling allowed running time setting value.

[0018] The application further provides an electronic device, comprising a processor coupled with a memory; the processor is used for executing a computer program stored in the memory, so that the electronic device executes the water power station governor hydraulic system self-starting enabling control method.

[0019] The application further provides a computer readable storage medium, comprising a computer program or instructions, when the computer program or instructions are executed on a computer, so that the computer executes the water power station governor hydraulic system self-starting enabling control method.

[0020] The application has the following beneficial effects:

[0021] (1) The present application sets a governor hydraulic system self-enabling manual control soft pressure plate, the user can flexibly control the governor hydraulic system self-enabling function in the computer monitoring system, when the unit is in running or shutdown state, the governor hydraulic system self-enabling manual control soft pressure plate remains to be withdrawn, without frequent adjustment with the unit state, so that the governor hydraulic system self-enabling function is always in the state of being put into, when the unit is actually in the shutdown state, the function will be automatically put into, and will not be misoperation when the unit is running. When the unit is in the state of defect or maintenance, if the governor hydraulic system self-enabling function needs to be prevented from starting the hydraulic system, the governor hydraulic system self-enabling manual control soft pressure plate can be put into the computer monitoring system.

[0022] (2) The governor hydraulic system self-enabling function can be automatically put into when the unit governor hydraulic system running state, unit start-up process, unit normal shutdown process, unit accident shutdown process and other conditions are not in action, which can avoid the governor hydraulic system being misoperated by the self-enabling function when the unit governor hydraulic system is in running state or the unit is in the process of starting up.

[0023] (3) The present application sets a self-enabling start pressure value and a self-enabling start oil level value, when the self-enabling start pressure value and the self-enabling start oil level value are met, and the conditions of the unit shutdown state, the unit speed less than the shutdown speed value, the unit guide vane servomotor lock pin put into, the unit LCU automatic control condition met, the unit governor hydraulic system remote control condition met, the unit governor hydraulic system running state, the unit start-up process, the unit normal shutdown process, the unit accident shutdown process and the governor hydraulic system self-enabling manual control function withdrawal condition are not in action, the governor hydraulic system self-enabling function is in action, and the governor hydraulic system is started. The self-enabling start pressure value and the self-enabling start oil level value should be reasonably set according to the actual situation of the hydropower station, but should avoid being too close to the accident shutdown protection pressure and oil level value of the governor hydraulic system pressure tank, in order to effectively ensure safety, and at the same time, the self-enabling function should be kept at a proper distance from the normal pressure and oil level value of the governor hydraulic system pressure tank, in order to avoid frequent action of the self-enabling function.

[0024] (4) The self-enabling stop pressure setting value and the self-enabling stop oil level setting value are set in the application. When one of the self-enabling stop pressure setting value and the self-enabling stop oil level setting value is met, the self-enabling allowed running time setting value is reached, the conditions of the water power station unit shutdown state, the unit speed being less than the shutdown speed setting value, the unit guide vane servomotor lock pin being put in, the unit LCU automatic control condition being met, and the unit governor hydraulic system remote control condition being met are all met, the unit startup process, the unit normal shutdown process, and the unit accident shutdown process are not acted, and the self-enabling manual control function exit condition of the governor hydraulic system is met, the self-enabling function of the governor hydraulic system is stopped, and the governor hydraulic system is stopped. The self-enabling allowed running time setting value should be reasonably set according to the actual situation of the water power station, so as to avoid the situation that the governor hydraulic system is started and then stopped immediately, and prevent the unfavorable conditions of the booster pump frequently running and the pipeline frequently being impacted by pressure. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The logic block diagram of the self-enabling control method of the governor hydraulic system of the water power station disclosed in the application is shown in the figure. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the application clearer, the application will be further described in detail below with reference to the drawings, but the embodiments of the application are not limited to this.

[0027] Embodiment 1

[0028] The method is based on a computer monitoring system. The monitoring system automatically collects parameters such as the unit state, the unit speed, the unit guide vane servomotor lock pin position, the pressure of the governor pressure tank, and the oil level. The self-enabling (i.e., automatic startup function) control program of the governor hydraulic system is set in the unit LCU (local control unit). In the case that the self-enabling function of the governor hydraulic system is automatically put in, the program controls the pressure and the oil level of the standby unit governor pressure tank in the normal range in real time according to the preset logic, conditions and setting values, and ensures that the unit is in the normal standby state at any time.

[0029] Specifically, referring to Figure 1 The embodiment discloses a self-enabling control method of a governor hydraulic system of a water power station, which comprises the following steps:

[0030] When the conditions of the hydropower unit shutdown state 3, the unit speed less than the shutdown speed 4, the unit guide vane servomotor lock pin put in 5, the unit LCU automatic control conditions meet 6, the unit governor hydraulic system remote control conditions meet 7 are all acted, the unit governor hydraulic system running state 8, the unit start-up process 9, the unit normal shutdown process 10, the unit accident shutdown process 11 are all not acted; if the computer monitoring system in the governor hydraulic system self-starting enabling manual control soft pad 2 is exited, the governor hydraulic system self-starting enabling manual control function 12 is exited, and the governor hydraulic system self-starting enabling function is automatically put in.

[0031] At this time, if the conditions of the governor hydraulic system pressure tank pressure lower than the self-starting enabling start pressure 13, the governor hydraulic system pressure tank oil level lower than the self-starting enabling start oil level 14 are all acted, the governor hydraulic system self-starting enabling function is acted, the governor hydraulic system is started 15, and the pressure and oil level of the governor hydraulic system pressure tank are restored to the normal range.

[0032] When the conditions of the hydropower unit shutdown state 3, the unit speed less than the shutdown speed 4, the unit guide vane servomotor lock pin put in 5, the unit LCU automatic control conditions meet 6, the unit governor hydraulic system remote control conditions meet 7 are all acted, the unit start-up process 9, the unit normal shutdown process 10, the unit accident shutdown process 11 are all not acted; if the computer monitoring system in the governor hydraulic system self-starting enabling manual control soft pad 2 is exited, the governor hydraulic system self-starting enabling manual control function 12 is exited, and the governor hydraulic system self-starting enabling function is automatically put in.

[0033] At this time, if one of the conditions of the governor hydraulic system pressure tank pressure higher than the self-starting enabling stop pressure 16, the governor hydraulic system pressure tank oil level higher than the self-starting enabling stop oil level 17 is acted, and the governor hydraulic system running time reaches the governor hydraulic system self-starting enabling allowed running time 18, the governor hydraulic system self-starting enabling function is stopped, the governor hydraulic system is stopped 19, and the governor hydraulic system is stopped for standby.

[0034] The self-enabling function of the governor hydraulic system is automatically put into operation when the self-enabling manual control soft pad 2 is not in the exit state, the unit is in the running or shutdown state, the self-enabling function of the governor hydraulic system is always in the put-in state, and the function is automatically put into operation only when the unit is in the shutdown state.

[0035] The self-enabling function of the governor hydraulic system is automatically put into operation when the self-enabling manual control soft pad 2 is not in the exit state, the unit is in the running or shutdown state, the self-enabling function of the governor hydraulic system is always in the put-in state, and the function is automatically put into operation only when the unit is in the shutdown state.

[0036] The self-enabling function of the governor hydraulic system is automatically put into operation when the self-enabling manual control soft pad 2 is not in the exit state, the unit is in the running or shutdown state, the self-enabling function of the governor hydraulic system is always in the put-in state, and the function is automatically put into operation only when the unit is in the shutdown state.

[0037] The self-enabling stop pressure setting value and the self-enabling stop oil level setting value are set in the application, when one of the self-enabling stop pressure setting value and the self-enabling stop oil level setting value meets, the conditions that the hydraulic system running time of the governor reaches the self-enabling allowed running time setting value, the unit is in the state of shutdown 3, the unit speed is less than the shutdown speed setting value 4, the unit guide vane servomotor lock pin is put in 5, the unit LCU automatic control condition meets 6, the unit governor hydraulic system remote control condition meets 7, and the unit starting process 9, the unit normal shutdown process 10 and the unit accident shutdown process 11 do not act, and the self-enabling manual control function 12 of the governor hydraulic system is put in, the self-enabling function of the governor hydraulic system is stopped, and the governor hydraulic system is stopped. The self-enabling allowed running time setting value should be reasonably set according to the actual situation of the hydropower station, so as to avoid the situation that the governor hydraulic system starts and stops immediately, and prevent the unfavorable situation that the booster pump frequently runs and the pipeline frequently impacts.

[0038] Embodiment 2:

[0039] The embodiment discloses a self-enabling control device of a governor hydraulic system of a hydropower station, which comprises:

[0040] The first monitoring module is used for monitoring that the conditions that the unit is in the state of shutdown 3, the unit speed is less than the shutdown speed setting value 4, the unit guide vane servomotor lock pin is put in 5, the unit LCU automatic control condition meets 6, and the unit governor hydraulic system remote control condition meets 7 all act, and the conditions that the unit governor hydraulic system running state 8, the unit starting process 9, the unit normal shutdown process 10 and the unit accident shutdown process 11 do not act;

[0041] The first execution module is used for, when the first monitoring module monitors that the self-enabling manual control soft pad 2 of the governor hydraulic system is exited, the self-enabling manual control function of the governor hydraulic system is exited, and the self-enabling function of the governor hydraulic system is automatically put in;

[0042] The first judgment module is used for, when the first monitoring module monitors that the pressure of the pressure tank of the governor hydraulic system is lower than the self-enabling start pressure setting value 13 and the oil level of the pressure tank of the governor hydraulic system is lower than the self-enabling start oil level setting value 14, the self-enabling function of the governor hydraulic system acts, the governor hydraulic system starts, and the pressure and the oil level of the pressure tank of the governor hydraulic system are restored to the normal range.

[0043] Further, the device further comprises:

[0044] The second execution module is configured to monitor the conditions of the water power station unit shutdown state 3, the unit rotation speed less than the shutdown rotation speed 4, the unit guide vane servomotor lock pin put in 5, the unit LCU automatic control condition 6, and the unit governor hydraulic system remote control condition 7, and the unit startup process 9, the unit normal shutdown process 10, and the unit accident shutdown process 11.

[0045] The second execution module is configured to put in the governor hydraulic system self-starting enabling manual control function when the second monitoring module monitors that the governor hydraulic system self-starting enabling manual control soft plate 2 is exited.

[0046] The second judgment module is configured to stop the governor hydraulic system self-starting enabling function and the governor hydraulic system when one of the conditions of the governor hydraulic system pressure tank pressure higher than the self-starting enabling stop pressure 16 and the governor hydraulic system pressure tank oil level higher than the self-starting enabling stop oil level 17 is monitored by the second monitoring module, and the governor hydraulic system running time reaches the governor hydraulic system self-starting enabling allowed running time 18.

[0047] Embodiment 3

[0048] The embodiment discloses an electronic device, including a processor coupled with a memory; the processor is used for executing a computer program stored in the memory, so that the electronic device executes the water power station governor hydraulic system self-starting enabling control method as described in embodiment 1.

[0049] Embodiment 4

[0050] The embodiment discloses a computer readable storage medium, including a computer program or instructions, when the computer program or instructions run on a computer, so that the computer executes the water power station governor hydraulic system self-starting enabling control method as described in embodiment 1.

[0051] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for enabling self-starting of a hydraulic system of a hydroelectric power station governor, characterized in that, Comprising: When the monitoring of the water power station unit shutdown state, the unit speed is less than the shutdown speed, the unit guide vane servo lock pin is put into, the unit LCU automatic control condition is satisfied, the unit governor hydraulic system remote control condition is satisfied, the action is all; The unit governor hydraulic system running state, the unit starting process is started, the unit normal shutdown process is started, the unit accident shutdown process is started, the condition is not all action; And the monitoring of the governor hydraulic system self-starting enable manual control soft pad exit, the governor hydraulic system self-starting enable manual control function is put into, the governor hydraulic system self-starting enable function is automatically put into; At this time, if the monitoring of the governor hydraulic system pressure tank pressure is lower than the self-starting enable start pressure, the governor hydraulic system pressure tank oil level is lower than the self-starting enable start oil level, the two conditions are all action, the governor hydraulic system self-starting enable function is action, the governor hydraulic system is started, the pressure and oil level of the governor hydraulic system pressure tank are restored to the normal range.

2. The method for enabling self-starting of the hydraulic system of the governor of a hydroelectric power station according to claim 1, characterized in that, Also comprising: When the monitoring of the water power station unit shutdown state, the unit speed is less than the shutdown speed, the unit guide vane servo lock pin is put into, the unit LCU automatic control condition is satisfied, the unit governor hydraulic system remote control condition is satisfied, the action is all; The unit starting process is started, the unit normal shutdown process is started, the unit accident shutdown process is started, the condition is not all action; And the monitoring of the governor hydraulic system self-starting enable manual control soft pad exit, the governor hydraulic system self-starting enable manual control function is put into, the governor hydraulic system self-starting enable function is automatically put into; At this time, if the monitoring of the governor hydraulic system pressure tank pressure is higher than the self-starting enable stop pressure, the governor hydraulic system pressure tank oil level is higher than the self-starting enable stop oil level, one of the two conditions is action, and the governor hydraulic system running time reaches the governor hydraulic system self-starting enable allowed running time, the governor hydraulic system self-starting enable function is stopped, the governor hydraulic system is stopped, and the governor hydraulic system is stopped.

3. A self-enabling control device for a hydraulic system of a hydroelectric power station governor, characterized in that, Comprising: The first monitoring module is used for monitoring the water power station unit shutdown state, the unit speed is less than the shutdown speed, the unit guide vane servo lock pin is put into, the unit LCU automatic control condition is satisfied, the unit governor hydraulic system remote control condition is satisfied, the action is all; The unit governor hydraulic system running state, the unit starting process is started, the unit normal shutdown process is started, the unit accident shutdown process is started, the condition is not all action; The first execution module is used for when the first monitoring module monitors the governor hydraulic system self-starting enable manual control soft pad exit, the governor hydraulic system self-starting enable manual control function is put into, the governor hydraulic system self-starting enable function is automatically put into; The first judgment module is used for when the first monitoring module monitors the governor hydraulic system pressure tank pressure is lower than the self-starting enable start pressure, the governor hydraulic system pressure tank oil level is lower than the self-starting enable start oil level, the two conditions are all action, the governor hydraulic system self-starting enable function is action, the governor hydraulic system is started, and the pressure and oil level of the governor hydraulic system pressure tank are restored to the normal range.

4. The hydroelectric governor hydraulic system self-enabling control device according to claim 3, characterized in that, Also comprising: The second execution module is configured to monitor the conditions of the hydropower unit shutdown state, the unit speed less than the shutdown speed, the unit guide vane servomotor lock pin put in, the unit LCU automatic control condition met, and the unit governor hydraulic system remote control condition met, and none of the conditions of the unit start-up process started, the unit normal shutdown process started, and the unit accident shutdown process started. The second execution module is configured to, when the second monitoring module monitors that the governor hydraulic system self-starting enabled manual control soft pressure plate exits, put in the governor hydraulic system self-starting enabled manual control function exit, and automatically put in the governor hydraulic system self-starting enabled function. The second judgment module is configured to, when the second monitoring module monitors that one of the conditions of the governor hydraulic system pressure tank pressure higher than the self-starting enabled stop pressure and the governor hydraulic system pressure tank oil level higher than the self-starting enabled stop oil level is met, and the governor hydraulic system running time reaches the governor hydraulic system self-starting enabled allowed running time, stop the governor hydraulic system self-starting enabled function, stop the governor hydraulic system, and stop the governor hydraulic system.

5. An electronic device, comprising: The electronic device comprises a processor coupled with a memory, and the processor is configured to execute a computer program stored in the memory, so that the electronic device performs the hydropower governor hydraulic system self-starting enabled control method of claim 1 or 2.

6. A computer readable storage medium characterized by, The computer program or instructions are configured to, when the computer program or instructions run on a computer, make the computer perform the hydropower governor hydraulic system self-starting enabled control method of claim 1 or 2.

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