CN113818988A - Hydroelectric generating set state control method for improving success rate of startup and shutdown - Google Patents
Hydroelectric generating set state control method for improving success rate of startup and shutdown Download PDFInfo
- Publication number
- CN113818988A CN113818988A CN202111069669.2A CN202111069669A CN113818988A CN 113818988 A CN113818988 A CN 113818988A CN 202111069669 A CN202111069669 A CN 202111069669A CN 113818988 A CN113818988 A CN 113818988A
- Authority
- CN
- China
- Prior art keywords
- state
- generating set
- hydroelectric generating
- auxiliary equipment
- starting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000010521 absorption reaction Methods 0.000 claims abstract description 37
- 239000000498 cooling water Substances 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 30
- 238000010248 power generation Methods 0.000 claims abstract description 21
- 239000003595 mist Substances 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000012546 transfer Methods 0.000 claims abstract description 3
- 230000001276 controlling effect Effects 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 8
- 238000009795 derivation Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000002572 peristaltic effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/005—Starting, also of pump-turbines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention relates to a hydroelectric generating set state control method for improving the success rate of startup and shutdown, wherein the hydroelectric generating set state comprises a shutdown state, a cooling water system operation state, an idle state, a grid-connected power generation state and an auxiliary equipment operation state, and the auxiliary equipment operation state is the hydroelectric generating set state which is subjected to state transfer control with the cooling water system operation state and the idle state; when the state of the hydroelectric generating set is the operating state of the auxiliary equipment, the technical water supply system, the speed regulator hydraulic system, the carbon powder absorption device and the oil mist absorption device of the hydroelectric generating set all operate. The control method of the invention finds the unit element fault and the unit abnormity as soon as possible by adding the running state of the auxiliary equipment in the starting and stopping process of the hydroelectric generating set, thereby striving more time for starting the standby unit and processing the fault for operation and maintenance personnel, and reducing the deviation of the power generation plan caused by the failure of starting; the automatic starting and stopping process of the hydroelectric generating set is optimized, and the success rate of the automatic starting and stopping of the hydroelectric generating set is improved.
Description
Technical Field
The invention belongs to the field of hydroelectric generation control, and particularly relates to a hydroelectric generating set state control method for improving the success rate of startup and shutdown.
Background
The hydroelectric generating set can frequently provide auxiliary services such as frequency modulation, peak shaving and the like with high quality, high precision and rapid response for an electric power system, and simultaneously can also cause the increase of water consumption, the reduction of the stability of the generating set, the increase of the abrasion of each part and the serious influence on the success rate of the automatic start-up and shut-down of the generating set, thus providing higher requirements on the automatic start-up and shut-down process design and the operation and maintenance level of a water supply motor.
At present, the automatic starting process of the hydroelectric generating set only has 4 states of running, idling, no-load and grid connection from starting to a cooling water system, and the running from starting to the cooling water system only can check whether a technical water supply system of the generating set is normal or not due to few operating equipment; the unit can be rotated by 3 operations of starting to idle running, no load and grid connection, if the starting time is too early, water resource waste and unit abrasion are caused, so that starting commands are generally sent out in advance by a few minutes according to a load curve and the starting process action time, the fault of an automatic element in the starting process is hardly processed, and starting failure and power generation plan deviation are easily caused.
Disclosure of Invention
Through analyzing the reasons, distribution and fault types of abnormal quitting of the start-up and shut-down process in the automatic start-up and shut-down process of 9 770MW mixed-flow hydraulic generator sets of the giant hydropower station for nearly three years, the main reasons influencing the automatic start-up and shut-down success rate of the hydraulic generator are that the device faults, the relay faults and the control parameter setting are unreasonable and account for 80% of the total unsuccessful times, wherein the device faults are mainly expressed as control device faults. The automatic components are in long-time live operation, long in service life, large in vibration of the operating environment, degraded year by year in performance, reduced in reliability, and almost half of defects caused by faults of the automatic components in the hydropower station account for the total amount of the defects. In the running state of the cooling water system, most of the automation elements do not run, when the water turbine runs to the idle state after being started, if the automation elements have faults or the unit is abnormal, operation and maintenance personnel cannot eliminate the faults in a short time, the grid connection delay of the unit power generation is likely to be caused, the execution of a power generation plan is influenced, and the waste of water resources is caused.
The invention aims to solve the problems and provides a method for controlling the state of a hydroelectric generating set, which can improve the success rate of starting and stopping the hydroelectric generating set, and the method is characterized in that a new running state of the hydroelectric generating set, namely the running state of auxiliary equipment is added in the automatic starting and stopping process of the hydroelectric generating set, when the running state of the hydroelectric generating set is the running state of the auxiliary equipment, a water turbine does not rotate, and a technical water supply system, a hydraulic system of a speed regulator, a carbon powder absorption device and an oil mist absorption device of the hydroelectric generating set all run so that operation and maintenance personnel can find the faults of elements of the hydroelectric generating set and the abnormity of the auxiliary equipment of the hydroelectric generating set as soon as possible, take treatment measures in time, improve the success rate of the automatic starting and stopping of the hydroelectric generating set and avoid the failure of starting and the deviation of a power generation plan.
The technical scheme of the invention is a hydroelectric generating set state control method for improving the success rate of startup and shutdown, wherein the hydroelectric generating set state comprises a shutdown state, a cooling water system running state, an idle state, a grid-connected power generation state and an auxiliary equipment running state, and the auxiliary equipment running state is the hydroelectric generating set state which is subjected to state transfer control with the cooling water system running state and the idle state; when the state of the hydroelectric generating set is the operating state of the auxiliary equipment, the technical water supply system, the speed regulator hydraulic system, the carbon powder absorption device and the oil mist absorption device of the hydroelectric generating set all operate; in the control process of starting up and grid-connected power generation of the hydroelectric generating set from a shutdown state, before the state of the hydroelectric generating set is transferred to a grid-connected power generation state through an idle state, the state of the hydroelectric generating set is firstly controlled to be transferred to an auxiliary equipment operation state from the shutdown state through a cooling water system operation state, and after the hydroelectric generating set operates for a period of time in the auxiliary equipment operation state, the state of the hydroelectric generating set is controlled to be switched to the idle state, so that element faults affecting the normal starting up of the hydroelectric generating set are found in advance, fault treatment measures are convenient to take, and the power generation plan of the hydroelectric generating set is not influenced.
The sub-states of the auxiliary device operating state specifically include: 1) the method comprises the following steps of (1) operating a technical water supply system of the unit, 2) setting the rotating speed of the unit to be 0, 3) operating a hydraulic system of a speed regulator normally, 4) closing guide vanes completely, 5) setting an automatic locking ingot of the speed regulator to be in an input state, 6) opening a breaker, 7) stopping an engine pit heater, 8) operating an upper oil mist absorption device, 9) operating a derivation oil mist absorption device, 10) operating a carbon powder absorption device, and 11) operating a water guide external circulation system.
The condition that the state of the hydroelectric generating set is changed from the running state of the cooling water system to the running state of the auxiliary equipment is as follows:
Cauxiliary deviceCommon derivation of upper guide bearing cooling system in normal AND of unit technology water supply systemBearing cooling system normal AND water guide bearing cooling system normal AND electric brake system normal AND set technology water supply valve open AND speed governor hydraulic system normal)
Wherein C isAuxiliary deviceAnd representing the condition which needs to be met when the state of the hydroelectric generating set is changed to the running state of the auxiliary equipment.
The control process for switching the running state of the hydroelectric generating set from the running state of the cooling water system to the running state of the auxiliary equipment comprises the following steps:
step 1: judging whether the condition that the state of the hydroelectric generating set is changed to the running state of the auxiliary equipment is met, and if the condition is met, executing the step 2;
if not, ending;
step 2: controlling the input of an oil mist absorption device and a carbon powder absorption device;
and step 3: withdrawing the pit heater, and judging to confirm that the pit heater is stopped;
step 3.1: exiting the pit heater;
step 3.2: judging whether the pit heater is stopped or not, if so, executing the step 4, and if not, finishing;
and 4, step 4: starting a hydraulic system of the speed regulator, and judging and confirming that the oil pressure and the oil level of the hydraulic system of the speed regulator are normal;
step 4.1: starting a speed regulator hydraulic system;
step 4.2: judging whether the hydraulic system of the speed regulator normally operates, if so, executing the step 4.3, and if not, ending the step;
step 4.3: judging whether the oil pressure and the oil level of a pipeline of a hydraulic system of the speed regulator meet the requirements, if so, executing the step 5, and if not, finishing;
and 5: judging whether the sealing water flow and the pressure of the main shaft of the water turbine are too low, if not, executing
Step 6, if the sealing water flow or the pressure is too low, ending;
step 6: and (5) changing the state of the hydroelectric generating set into the running state of the auxiliary equipment, and ending.
Preferably, the process of controlling the hydroelectric generating set to switch from the cooling water system operating state to the auxiliary equipment operating state further comprises inhibiting creep detection.
Further, whether the oil pressure and the oil level of the pipeline of the hydraulic system of the speed regulator meet the requirements or not is judged, and the method specifically comprises the following steps:
(a) the oil pressure of a pipeline of a hydraulic system of the speed regulator is more than 6.1 MPa;
(b) the pressure of a pressure oil tank of a speed regulator hydraulic system is more than 6.1 MPa;
(c) the oil level of a pressure oil tank of a speed regulator hydraulic system is larger than 1200 mm.
The control process of the hydroelectric generating set from the operation state of the auxiliary equipment to the idle state comprises the following steps:
step 1: judging whether the condition that the state of the hydroelectric generating set is changed to the idle state is met, if so, executing the step 2, and if not, ending the step;
step 2: controlling the automatic locking ingot to be pulled out, and judging and confirming the automatic locking ingot to be pulled out;
and step 3: starting a pressure regulating oil pump and judging whether the pressure building of the high-pressure oil system is successful or not;
and 4, step 4: judging and confirming that the mechanical brake is completely withdrawn;
and 5: controlling the speed governor to start up, and judging and confirming that the rotating speed of the unit is close to the rated rotating speed;
step 6: judging and confirming that the electric brake switch is in the separated position;
and 7: and (5) the state of the hydroelectric generating set is changed into a idling state, and the operation is finished.
The control process for switching the hydroelectric generating set from the auxiliary equipment operation state to the cooling water system operation state comprises the following steps:
step 1: judging whether a shutdown condition is met, if so, executing the step 2, otherwise, ending;
step 2: a Local Control Unit (LCU) opens a speed regulator stop order, controls a braking dust absorption device and controls and starts a high-pressure oil pump; judging and confirming that the electric brake system is normal;
step 2.1: the local control unit LCU opens a speed regulator stop order;
step 2.2: controlling the input brake dust absorption device;
step 2.3: starting the high-pressure oil pump at a rated rotating speed of less than 90 percent of the rotating speed of the unit;
step 2.4: judging whether the electric braking system is normal, if so, executing a step 3, otherwise, executing a step 4;
and step 3: judging whether the guide vane is completely closed, if so, executing the step 5, and if not, ending;
and 4, step 4: stopping the speed regulator, starting the speed regulator for 5 minutes, judging that the rotating speed of the unit is less than 20% of the rated rotating speed, if so, executing the step 15, and otherwise, ending the step;
and 5: judging whether the speed of the unit is lower than 50% of the rated speed within 480 seconds after the speed governor is stopped, if so, executing the step 6, otherwise, ending;
step 6: distributing the ground switch of the electric brake switch, closing the electric brake switch, and judging and confirming the ground switch of the electric brake switch to be switched off;
step 6.1: controlling and separating the electric brake switch ground knife;
step 6.2: closing an electric brake switch, and closing an electric brake 400V switch;
step 6.3: judging whether the ground knife of the electric brake switch is opened or not, if so, executing a step 7, otherwise, executing a step 10;
and 7: judging whether the electric brake switch is switched on, if so, executing the step 8, otherwise, executing the step 10;
and 8: judging whether an electric braking 400V switch is switched on, if so, executing a step 9, otherwise, executing a step 10;
and step 9: judging whether the alternating current field suppression switch is opened or not, if so, controlling to put into electric braking, and executing the step 11, otherwise, executing the step 10;
step 10: judging whether the rotating speed of the unit is less than 20% within 300 seconds when the local control unit switches on the electric brake switch, if so, executing the step 15, otherwise, ending;
step 11: the local control unit opens an electric brake input order and judges whether an electric brake switch is switched on, if so, step 12 is executed, otherwise, step 13 is executed;
step 12: judging whether the rotating speed of the unit is less than 10% of the rated rotating speed, if so, executing a step 14, and if not, finishing;
step 13: judging whether the rotating speed of the unit is less than 20% of the rated rotating speed, if so, executing the step 15, and if not, finishing;
step 14: controlling to quit the electric braking;
step 15: controlling to put into mechanical braking, judging whether the rotating speed of the unit is 0, if so, executing the step 16, and if not, finishing;
step 16: judging whether the guide vane is completely closed, if so, executing the step 17, and if not, ending;
and step 17: controlling the input speed regulator to automatically lock the spindle, judging whether the automatic spindle is input or not, if so, executing the step 18, and otherwise, alarming;
step 18: the unit state becomes the auxiliary equipment running state.
The control process for switching the hydroelectric generating set from the idle state to the auxiliary equipment operation state comprises the following steps:
step 1: judging whether a shutdown condition is met, if so, executing the step 2, otherwise, ending;
step 2: the water-cut-off external circulation oil pump, the electric brake switch and the electric brake 400V switch are put into the unit creeping device, and the unit creeping device is confirmed to have no creeping alarm;
and step 3: controlling and stopping a speed regulator hydraulic system, controlling and withdrawing a braking dust absorption device, a carbon powder absorption device, a derived oil mist absorption device and an upper-guided oil mist absorption device, and controlling and withdrawing mechanical braking;
and 4, step 4: judging and confirming that all the pressure oil pumps of the hydraulic system of the speed regulator are stopped;
and 5: judging and confirming that the isolation valve of the hydraulic system of the speed regulator is completely closed;
step 6: judging and confirming that all the mechanical braking air brakes fall down;
and 7: the state of the unit is changed into the running state of the cooling water system.
Compared with the prior art, the control method has the advantages that a new running state of the hydroelectric generating set is added in the starting and stopping process of the hydroelectric generating set, so that the faults of the elements of the hydroelectric generating set and the abnormity of the hydroelectric generating set can be found as soon as possible when the hydroelectric generating set is in the running state of the auxiliary equipment, more time for starting the standby hydroelectric generating set and processing the faults is strived for operation and maintenance personnel, and the deviation of a power generation plan caused by the failure of starting is reduced; the automatic starting and stopping process of the hydroelectric generating set is optimized, the success rate of the automatic starting and stopping of the hydroelectric generating set is improved, and the safe, stable and efficient operation of a power grid is facilitated; the condition that the hydroelectric generating set is scheduled and checked due to power generation plan deviation caused by unsuccessful starting is reduced.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is a schematic view of a state of a hydroelectric generating set according to an embodiment of the present invention.
Fig. 2 is a sub-state diagram of an operation state of an auxiliary device according to an embodiment of the present invention.
Fig. 3 is a logic diagram of conditions of the hydroelectric generating set from a start-up of the hydroelectric generating set to an operating state of the auxiliary equipment according to the embodiment of the present invention.
Fig. 4 is a control flow diagram of the switching of the hydroelectric generating set from the cooling water system operating state to the auxiliary equipment operating state according to the embodiment of the present invention.
Fig. 5 is a control flowchart of the hydroelectric generating set according to the embodiment of the present invention, which switches from the auxiliary equipment operating state to the idling state.
Fig. 6 is a control flow chart of the hydroelectric generating set according to the embodiment of the present invention, which is switched from the idling state to the auxiliary device operating state.
Fig. 7 is a control flow diagram of the switching of the hydroelectric generating set from the auxiliary equipment operating state to the cooling water system operating state according to the embodiment of the present invention.
Fig. 8 is a schematic view of the condition logic of the hydroelectric generating set according to the embodiment of the present invention, in which the auxiliary equipment is switched from the operating state to the idling state.
Fig. 9 is a logic diagram of basic conditions for starting up the hydroelectric generating set according to the embodiment of the present invention.
FIG. 10 is a logic diagram of the basic shutdown conditions for a hydroelectric generating set in accordance with an embodiment of the present invention.
Detailed Description
As shown in fig. 1, the states of the hydroelectric generating set of the embodiment include a shutdown state, a cooling water system operation state, an auxiliary device operation state, an idling state, a grid-connected power generation state, a transition state, and an unknown state, where the auxiliary device operation state is a state of the hydroelectric generating set between the cooling water system operation state and the idling state. The method comprises the following steps of defining 6 unit states of a shutdown state, a cooling water system operation state, an auxiliary equipment operation state, an idle state and a grid-connected power generation state as stable states, and defining 2 unit states of a transition state and an unknown state as indefinite states. When the state of the hydroelectric generating set is the operating state of the auxiliary equipment, the technical water supply system, the speed regulator hydraulic system, the carbon powder absorption device and the oil mist absorption device of the hydroelectric generating set all operate; in the control process of starting up and grid-connected power generation of the hydroelectric generating set from a shutdown state, before the state of the hydroelectric generating set is transferred to a grid-connected power generation state through an idle state, the state of the hydroelectric generating set is firstly controlled to be transferred to an auxiliary equipment operation state from the shutdown state through a cooling water system operation state, and after the hydroelectric generating set operates for a period of time in the auxiliary equipment operation state, the state of the hydroelectric generating set is controlled to be switched to the idle state, so that element faults affecting the normal starting up of the hydroelectric generating set are found in advance, fault treatment measures are convenient to take, and the power generation plan of the hydroelectric generating set is not influenced.
As shown in fig. 2, the sub-states of the auxiliary device operation state specifically include: 1) the method comprises the following steps of (1) operating a technical water supply system of the unit, 2) setting the rotating speed of the unit to be 0, 3) operating a hydraulic system of a speed regulator normally, 4) closing guide vanes completely, 5) putting an automatic locking ingot of the speed regulator into an input state, 6) opening a GCB (gate separating position) of a circuit breaker, 7) stopping an pit heater, 8) operating an upper guide oil mist absorption device, 9) deducing the operation of the oil mist absorption device, 10) operating a carbon powder absorption device, and 11) operating a water guide external circulation system.
In the embodiment, all the measuring points which are acquired by the LCU of the unit and directly influence the execution and conversion of the starting process of the unit are used as the starting conditions of the process after certain logic configuration, after the monitoring is carried out and the starting is sent to the operating state command of the auxiliary equipment, the LCU can automatically judge whether the corresponding starting conditions are met or not according to the target state, the process can be started after the conditions are met, and the condition that the fault is operated again, the damage degree of the equipment is increased, and the fault is enlarged is prevented.
Meanwhile, a starting condition picture of the flow from the machine set starting to the auxiliary equipment running state is drawn on an upper computer of the monitoring system, the picture visually shows the state of the local equipment on an operator station of the monitoring system in a dynamic link mode, an operator calls the starting and stopping condition monitoring picture in advance before the starting and stopping operation is executed on the monitoring system, and the picture can quickly and accurately find the obstacles influencing the machine set starting and intervene in advance, so that the aim of improving the success rate of the machine set starting and stopping is fulfilled.
As shown in fig. 3, the condition that the state of the hydroelectric generating set is changed from the operating state of the cooling water system to the operating state of the auxiliary equipment is as follows:
Cauxiliary device(((start-up condition AND technique water supply system running AND upper guide bearing cooling system normal AND deduces bearing cooling system normal)
Normal AND of water guide bearing cooling system AND normal AND (NOT idling state) of electric brake system
AND (NOT grid-connected state) AND unit technology water supply four-way valve is opened) OR cooling water system operation state) AND speed regulator hydraulic system is normal
Wherein C isAuxiliary deviceAnd representing the condition which needs to be met when the state of the hydroelectric generating set is changed to the running state of the auxiliary equipment.
As shown in fig. 4 and fig. 1, a control process of switching the hydroelectric generating set from the cooling water system operation state to the auxiliary equipment operation state includes:
step 1: after receiving a command for switching the water system operation state to the auxiliary equipment operation state, the LCU automatically judges whether the condition for changing the state of the hydroelectric generating set to the auxiliary equipment operation state is met, and if the condition is met, the step 2 is executed; if not, ending;
step 2: the LCU sends out instructions for starting the oil mist absorption device and the carbon powder absorption device and forbidding creep detection;
and step 3: the LCU starts a pit heater exit order and judges that the pit heater is stopped;
step 3.1: the LCU is driven out of the pit heater exit order;
step 3.2: judging whether the pit heater is stopped or not, if so, executing the step 4, and if not, finishing;
and 4, step 4: the LCU opens a command for starting a hydraulic system of the speed regulator and judges and confirms that the oil pressure and the oil level of the hydraulic system of the speed regulator are normal;
step 4.1: the LCU opens a hydraulic system command for starting the speed regulator;
step 4.2: judging whether the hydraulic system of the speed regulator normally operates, if so, executing the step 4.3, and if not, ending the step;
step 4.3: judging whether the oil pressure and the oil level of a pipeline of a hydraulic system of the speed regulator meet the requirements, if so, executing the step 5, and if not, finishing; and 5: judging whether the water flow and the pressure of the main shaft seal of the water turbine are too low, if so, finishing, and if not, executing the step 6;
step 5.1: judging that the oil pressure of a pipeline of a hydraulic system of the speed regulator is more than 6.1MPa, if so, executing the step 5.2, and if not, finishing;
step 5.2: judging that the pressure of a pressure oil tank of a hydraulic system of the speed regulator is greater than 6.1MPa, if so, executing the step 5.3, and if not, ending;
step 5.3: and (6) judging that the oil level of a pressure oil tank of the speed regulator hydraulic system is larger than 1200mm, if so, executing the step 6, and otherwise, ending.
Step 6: and (5) changing the state of the hydroelectric generating set into the running state of the auxiliary equipment, and ending.
As shown in fig. 5 and fig. 1, a control process for switching the hydroelectric generating set from the auxiliary equipment operation state to the idling state includes:
step 1: after receiving a command for converting the running state of the auxiliary equipment of the hydroelectric generating set into the idle state, the LCU automatically judges whether the condition for converting the state of the hydroelectric generating set into the idle state is met, if so, the step 2 is executed, and if not, the step is ended;
step 2: the LCU opens an automatic locking spindle pulling-out order and judges and confirms that the automatic locking spindle is pulled out;
and step 3: the LCU starts a pressure regulating oil pump starting order, judges whether the pressure building of the high-pressure oil system is successful and keeps for 10 seconds, if so, executes the step 4, otherwise, finishes;
and 4, step 4: judging whether the mechanical brake is completely withdrawn, if so, executing the step 5, and if not, finishing;
and 5: starting a speed regulator by the LCU, stopping the high-pressure oil pump when the rotating speed of the set is greater than 90% of the rated rotating speed, judging whether the rotating speed of the set is greater than or equal to 95% of the rated rotating speed and is kept for more than 10 seconds, if so, executing the step 6, otherwise, ending;
step 6: judging whether the electric brake switch is in the position division state, if so, executing the step 7, otherwise, ending;
and 7: and (5) the state of the hydroelectric generating set is changed into a idling state, and the operation is finished.
As shown in fig. 6 and 1, a control process in which the hydro-power unit switches from the auxiliary equipment operating state to the cooling water system operating state comprises:
step 1: after receiving a command for switching from the idle state to the operating state of the auxiliary equipment, the LCU automatically judges whether a shutdown condition is met, if so, the step 2 is executed, otherwise, the step is ended;
step 2: controlling the speed governor to stop, controlling the input brake dust absorption device, and controlling the starting of the high-pressure oil pump; judging and confirming that the electric brake system is normal;
step 2.1: the local control unit LCU opens a speed regulator stop order;
step 2.2: the local control unit LCU opens a command for throwing into the brake dust absorption device;
step 2.3: the local control unit LCU starts a high-pressure oil pump order when the set rotating speed is less than 90 percent of the rated rotating speed;
step 2.4: judging whether the electric braking system is normal, if so, executing a step 3, otherwise, executing a step 4;
and step 3: judging whether the guide vane is completely closed, if so, executing the step 5, and if not, ending;
and 4, step 4: stopping the speed regulator, starting the speed regulator for 5 minutes, judging that the rotating speed of the unit is less than 20% of the rated rotating speed, if so, executing the step 15, and otherwise, ending the step;
and 5: judging whether the speed of the unit is lower than 50% of the rated speed within 480 seconds after the speed governor is stopped, if so, executing the step 6, otherwise, ending;
step 6: the LCU opens a ground switch command of the electric brake switch, closes the electric brake switch command and closes the electric brake 400V switch command, and judges and confirms that the ground switch of the electric brake switch is opened;
step 6.1: the LCU sends out a command of separating an electric brake switch ground switch;
step 6.2: the LCU sends out commands of switching on and off the electric brake switch and switching on and off the 400V electric brake switch;
step 6.3: judging whether the ground knife of the electric brake switch is opened or not, if so, executing a step 7, otherwise, executing a step 10;
and 7: judging whether the electric brake switch is switched on, if so, executing the step 8, otherwise, executing the step 10;
and 8: judging whether an electric braking 400V switch is switched on, if so, executing a step 9, otherwise, executing a step 10;
and step 9: judging whether the alternating current field suppression switch is opened or not, if so, controlling to put into electric braking, and executing the step 11, otherwise, executing the step 10;
step 10: judging whether the rotating speed of the unit is less than 20% of the rated rotating speed within 300 seconds when the LCU opens the electric brake switch to be switched on, if so, executing the step 15, otherwise, ending;
step 11: the LCU opens an electric brake input order and judges whether an electric brake switch is switched on, if so, step 12 is executed, otherwise, step 13 is executed;
step 12: judging whether the rotating speed of the unit is less than 10% of the rated rotating speed, if so, executing a step 14, and if not, finishing;
step 13: judging whether the rotating speed of the unit is less than 20% of the rated rotating speed, if so, executing the step 15, and if not, finishing;
step 14: the LCU is opened to exit the electric brake order;
step 15: the LCU is put into a mechanical braking order, whether the rotating speed of the unit is 0 or not is judged, if yes, the step 16 is executed, and if not, the operation is finished;
step 16: judging whether the guide vane is completely closed, if so, executing the step 17, and if not, ending;
and step 17: the LCU issues an automatic spindle locking command of the input speed regulator and judges whether an automatic spindle locking is input or not, if yes, step 18 is executed, and if not, an alarm is given;
step 18: the unit state becomes the auxiliary equipment running state.
As shown in fig. 7 and 1, the control process for switching the hydroelectric generating set from the idle state to the auxiliary equipment operation state ninthly comprises:
step 1: after receiving a switching command from the operation state of the auxiliary equipment to the operation state of the water system, the LCU automatically judges whether a shutdown condition is met, if so, the step 2 is executed, otherwise, the step is ended;
step 2: the LCU starts a command of a water-cut-off external circulation oil guide pump, a power distribution electric brake switch and a power distribution electric brake 400V switch and a command of putting into a unit peristaltic device, and confirms that the unit peristaltic device does not creep and give an alarm;
and step 3: the LCU opens a command for stopping the hydraulic system of the speed regulator and exiting the brake dust absorption device, the carbon powder absorption device, the derivation oil mist absorption device and the upper guidance oil mist absorption device and exits the mechanical brake command;
and 4, step 4: judging that all the pressure oil pumps of the hydraulic system of the speed regulator stop running, if so, executing the step 5, and if not, ending;
and 5: judging that the isolation valve of the hydraulic system of the speed regulator is completely closed, if so, executing the step 6, and if not, ending;
step 6: judging that all the mechanical braking air brakes fall down, if so, executing the step 7, and if not, ending;
and 7: the state of the unit is changed into the running state of the cooling water system.
As shown in fig. 8, the condition that the state of the hydroelectric generating set is switched from the operation state of the auxiliary equipment to the idle state is as follows:
Cair conditionerNormal AND water inlet gate AND water turbine backup protection of unit in auxiliary equipment operation state AND high-pressure oil system
Normal of electrical system of AND speed regulator AND normal of hydraulic system of AND speed regulator AND fall of mechanical brake
AND turbine maintenance air seal has been withdrawn from AND turbine main shaft seal water operation normal AND startup basic condition)
Wherein C isAir conditionerAnd representing the condition which needs to be met when the state of the hydroelectric generating set is changed to the idle state.
As shown in fig. 9, the basic conditions for starting up the hydroelectric generating set are as follows:
Copening deviceThe first-class mechanical accident shutdown is not started AND the second-class mechanical accident shutdown is not started AND the electrical accident shutdown is not started
The AND monitoring prohibits the startup soft pressing plate from exiting the AND monitoring unit maintenance state soft pressing plate from exiting the AND (NO T transition state)
AND (NOT set state unknown) AND local control unit AC AND DC power supply normal)
Wherein C isOpening deviceThe starting basic condition of the unit is shown.
As shown in fig. 10, the shutdown condition of the hydroelectric generating set:
CstopThe control mode of the speed regulation system in the monitoring system AND the control mode of the excitation system in the monitoring system AND the normal mode of the high-pressure oil system AND the normal mode of the mechanical braking system
The AND rapid shutdown process is not started AND the AND emergency shutdown process is not started (the NO T site control unit is in a debugging state)
AND ((the unit is in a grid-connected power generation state AND the unit has active power less than 100MW) OR generator outlet switch opening)
Wherein C isStopIndicating a shutdown condition of the unit.
Claims (7)
1. The method for controlling the state of the hydroelectric generating set is used for improving the success rate of starting and stopping the hydroelectric generating set, wherein the states of the hydroelectric generating set comprise a stopping state, a cooling water system running state, an idling state and a grid-connected generating state, and is characterized in that the states of the hydroelectric generating set further comprise an auxiliary equipment running state, and the auxiliary equipment running state is a state of the hydroelectric generating set which is subjected to state transfer control with the cooling water system running state and the idling state;
when the state of the hydroelectric generating set is the operating state of the auxiliary equipment, the technical water supply system, the speed regulator hydraulic system, the carbon powder absorption device and the oil mist absorption device of the hydroelectric generating set all operate;
in the control process of starting up and grid-connected power generation of the hydroelectric generating set from a shutdown state, before the state of the hydroelectric generating set is transferred to a grid-connected power generation state through an idle state, the state of the hydroelectric generating set is firstly controlled to be transferred to an auxiliary equipment operation state from the shutdown state through a cooling water system operation state, and after the hydroelectric generating set operates for a period of time in the auxiliary equipment operation state, the state of the hydroelectric generating set is controlled to be switched to the idle state, so that element faults affecting the normal starting up of the hydroelectric generating set are found in advance, fault treatment measures are convenient to take, and the power generation plan of the hydroelectric generating set is not influenced.
2. The hydroelectric generating set state control method according to claim 1, wherein the sub-states of the operating state of the auxiliary equipment specifically comprise: 1) the method comprises the following steps of (1) operating a technical water supply system of the unit, 2) setting the rotating speed of the unit to be 0, 3) operating a hydraulic system of a speed regulator normally, 4) closing guide vanes completely, 5) setting an automatic locking ingot of the speed regulator to be in an input state, 6) opening a breaker, 7) stopping an engine pit heater, 8) operating an upper oil mist absorption device, 9) operating a derivation oil mist absorption device, 10) operating a carbon powder absorption device, and 11) operating a water guide external circulation system.
3. The hydroelectric generating set state control method according to claim 2, wherein the condition for the state of the hydroelectric generating set to transition from the cooling water system operating state to the auxiliary equipment operating state is as follows:
C auxiliary device= (normal AND of water supply system AND derivation bearing cooling system AND normal AND of water guide bearing cooling system AND normal AND of electric brake system AND normal of water supply valve AND opening of water supply valve AND normal of speed governor hydraulic system in unit technology)
WhereinC Auxiliary deviceAnd representing the condition which needs to be met when the state of the hydroelectric generating set is changed to the running state of the auxiliary equipment.
4. The hydroelectric generating set state control method of claim 3, wherein the control process of the hydroelectric generating set to switch from the cooling water system operating state to the auxiliary equipment operating state comprises:
step 1: judging whether the condition that the state of the hydroelectric generating set is changed to the running state of the auxiliary equipment is met, and if the condition is met, executing the step 2; if not, ending;
step 2: controlling the input of an oil mist absorption device and a carbon powder absorption device;
and step 3: withdrawing the pit heater, and judging to confirm that the pit heater is stopped;
step 3.1: exiting the pit heater;
step 3.2: judging whether the pit heater is stopped or not, if so, executing the step 4, and if not, finishing;
and 4, step 4: starting a hydraulic system of the speed regulator, and judging and confirming that the oil pressure and the oil level of the hydraulic system of the speed regulator are normal;
step 4.1: starting a speed regulator hydraulic system;
step 4.2: judging whether the hydraulic system of the speed regulator normally operates, if so, executing the step 4.3, and if not, ending the step;
step 4.3: judging whether the oil pressure and the oil level of a pipeline of a hydraulic system of the speed regulator meet the requirements, if so, executing the step 5, and if not, finishing;
and 5: judging whether the sealing water flow and the pressure of the main shaft of the water turbine are normal or not, if so, executing the step 6, and if not, finishing;
step 6: and (5) changing the state of the hydroelectric generating set into the running state of the auxiliary equipment, and ending.
5. The hydroelectric generating set state control method of claim 4, wherein the controlling the hydroelectric generating set to switch from a cooling water system operating state to an auxiliary equipment operating state further comprises inhibiting creep detection.
6. The hydroelectric generating set state control method according to claim 4, wherein the determining whether the oil pressure and oil level of the pipeline of the hydraulic system of the speed regulator meet the requirements specifically comprises:
(a) the oil pressure of a pipeline of a hydraulic system of the speed regulator is more than 6.1 MPa;
(b) the pressure of a pressure oil tank of a speed regulator hydraulic system is more than 6.1 MPa;
(c) the oil level of a pressure oil tank of a speed regulator hydraulic system is larger than 1200 mm.
7. The hydroelectric generating set state control method according to claim 1, wherein the control process of the hydroelectric generating set from the auxiliary equipment operation state to the idling state comprises:
step 1: judging whether the condition that the state of the hydroelectric generating set is changed to the idle state is met, if so, executing the step 2, and if not, ending the step;
step 2: controlling the automatic locking ingot to be pulled out, and judging and confirming the automatic locking ingot to be pulled out;
and step 3: starting a pressure regulating oil pump and judging whether the pressure building of the high-pressure oil system is successful or not;
and 4, step 4: judging and confirming that the mechanical brake is completely withdrawn;
and 5: controlling the speed governor to start up, and judging and confirming that the rotating speed of the unit is close to the rated rotating speed;
step 6: judging and confirming that the electric brake switch is in the separated position;
and 7: and (5) the state of the hydroelectric generating set is changed into a idling state, and the operation is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069669.2A CN113818988B (en) | 2021-09-13 | 2021-09-13 | Hydroelectric generating set state control method for improving start-stop success rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069669.2A CN113818988B (en) | 2021-09-13 | 2021-09-13 | Hydroelectric generating set state control method for improving start-stop success rate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113818988A true CN113818988A (en) | 2021-12-21 |
| CN113818988B CN113818988B (en) | 2024-03-12 |
Family
ID=78914460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111069669.2A Active CN113818988B (en) | 2021-09-13 | 2021-09-13 | Hydroelectric generating set state control method for improving start-stop success rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113818988B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475865A (en) * | 1981-01-30 | 1984-10-09 | Tokyo Shibaura Denki Kabushiki Kaisha | Apparatus for controlling the operation of a water turbine or a pump turbine and a method thereof |
| US6091161A (en) * | 1998-11-03 | 2000-07-18 | Dehlsen Associates, L.L.C. | Method of controlling operating depth of an electricity-generating device having a tethered water current-driven turbine |
| US6602044B1 (en) * | 1999-10-29 | 2003-08-05 | Takao Kuwabara | Pump turbine, method of controlling thereof, and method of stopping thereof |
| JP2010150943A (en) * | 2008-12-24 | 2010-07-08 | Kayaba Ind Co Ltd | Hydroelectric system |
| CN106150852A (en) * | 2016-08-31 | 2016-11-23 | 中国长江电力股份有限公司 | A kind of startup-shutdown flow process of high water head mixed-flow Large-scale machine set |
| CN112963295A (en) * | 2021-03-26 | 2021-06-15 | 中国长江电力股份有限公司 | System and method for controlling working state of black start electric control system of water turbine speed regulator |
-
2021
- 2021-09-13 CN CN202111069669.2A patent/CN113818988B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475865A (en) * | 1981-01-30 | 1984-10-09 | Tokyo Shibaura Denki Kabushiki Kaisha | Apparatus for controlling the operation of a water turbine or a pump turbine and a method thereof |
| US6091161A (en) * | 1998-11-03 | 2000-07-18 | Dehlsen Associates, L.L.C. | Method of controlling operating depth of an electricity-generating device having a tethered water current-driven turbine |
| US6602044B1 (en) * | 1999-10-29 | 2003-08-05 | Takao Kuwabara | Pump turbine, method of controlling thereof, and method of stopping thereof |
| JP2010150943A (en) * | 2008-12-24 | 2010-07-08 | Kayaba Ind Co Ltd | Hydroelectric system |
| CN106150852A (en) * | 2016-08-31 | 2016-11-23 | 中国长江电力股份有限公司 | A kind of startup-shutdown flow process of high water head mixed-flow Large-scale machine set |
| CN112963295A (en) * | 2021-03-26 | 2021-06-15 | 中国长江电力股份有限公司 | System and method for controlling working state of black start electric control system of water turbine speed regulator |
Non-Patent Citations (1)
| Title |
|---|
| 吴正良;吴卫明;宋宏进;: "水电站机组LCU控制流程设计及实施", 科技资讯 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113818988B (en) | 2024-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105298735B (en) | A kind of safe and reliable scaled bulb tubular hydraulic generator is opened, halt control method | |
| CN101290342B (en) | Hydroelectric units black start-up ability verification test method | |
| CN106150852B (en) | A kind of startup-shutdown flow of high water head mixed-flow Large-scale machine set | |
| CN107493039B (en) | Mechanical braking control device, method and system of pumping and accumulating unit | |
| CN111835031B (en) | Wind generating set converter network side breaker and machine side switch control strategy | |
| CN111255536B (en) | FCB operation method of gas-steam unit power plant | |
| CN111668520A (en) | Fuel cell system and shutdown control method thereof | |
| CN112628711A (en) | Auxiliary engine fault stable combustion control method based on 600MW supercritical unit low load | |
| CN106968874B (en) | Generator motor high pressure oil jacking system control method | |
| CN113818988A (en) | Hydroelectric generating set state control method for improving success rate of startup and shutdown | |
| CN111852750B (en) | Control method for air brake system of generator motor | |
| CN113623127B (en) | Control method for working state of electric control system of speed regulator of hydroelectric generating set | |
| CN104637558B (en) | Safe and stable control method for asynchronous oscillation of nuclear power unit | |
| CN113669243B (en) | Control system and method for high-pressure oil jacking device of pumped storage unit | |
| CN110966137B (en) | Secondary shutdown control method for pumped storage unit | |
| CN113685237B (en) | Rapid starting system and one-key rapid starting method for generator set under fault condition | |
| CN113623128B (en) | One-key-opening guide vane drainage method for mixed flow type hydroelectric generating set monitoring system | |
| CN116231668B (en) | Self-contained station service control method based on load shedding of low-vacuum back-pumping machine | |
| CN116677675A (en) | Self-starting enabling control method, device and equipment for hydraulic system of hydropower station speed regulator | |
| JP2005201834A (en) | Nuclear power plant and method for operating it | |
| CN113565669B (en) | Safe and reliable control method for mechanical braking system of pumped storage unit | |
| CN111271215B (en) | Overload protection method for hydroelectric generating set | |
| CN113866633B (en) | Method for carrying out load test on diesel generator of security power supply system of power plant | |
| CN113315096B (en) | Water-oil-ash bus power loss processing method and system | |
| CN115929535A (en) | Control method for shutdown sequence control flow branch outlet switch of unit of hydraulic power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |