CN116799852A - Control method of large-sized hydroelectric generating set - Google Patents
Control method of large-sized hydroelectric generating set Download PDFInfo
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- CN116799852A CN116799852A CN202310616251.1A CN202310616251A CN116799852A CN 116799852 A CN116799852 A CN 116799852A CN 202310616251 A CN202310616251 A CN 202310616251A CN 116799852 A CN116799852 A CN 116799852A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000004044 response Effects 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 8
- 239000003595 mist Substances 0.000 claims description 8
- 238000010977 unit operation Methods 0.000 claims description 7
- 230000005284 excitation Effects 0.000 claims description 5
- 230000002572 peristaltic effect Effects 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
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- 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
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- 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
- H02J3/12—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
-
- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/36—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using armature-reaction-excited machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/10—Special adaptation of control arrangements for generators for water-driven turbines
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The application provides a control method of a large-sized hydroelectric generating set, and relates to schemes such as a set automatic start-up load increasing flow, a set load increasing condition judging basis, a set automatic start-up load increasing flow judging condition, a set state judging condition after grid connection, a set outlet voltage and current judging mode, and logic for active power issuing when the set is automatically loaded.
Description
Technical Field
The application relates to the technical field of control of hydroelectric generating sets, in particular to a control method of a large hydroelectric generating set.
Background
With the continuous improvement of living standard, the demand for electric power is more and more increased, the demand shows obvious time law, and the power supply demand of one day shows obvious wave crest and wave trough. Under the current energy development level, most of basic loads are born in an electric power structure in view of the characteristics of inconvenient start and stop of the thermal power generating unit and small load adjustment interval. The hydroelectric generating set has high starting and stopping speed and large load adjustment interval, and can better bear the tasks of peak regulation, frequency modulation and voltage regulation. Therefore, the hydroelectric generating set can be frequently started and stopped.
The current startup and grid connection load increasing process of the large-sized hydroelectric generating set can be divided into three parts.
1. The control system starts the water turbine generator set to the set grid connection;
2. after the machine set is connected with the grid, the load of the machine set is gradually increased by manual command, and the machine set penetrates through a vibration area of the machine set until the target load is reached;
3. after the unit reaches the target load, the unit is manually put into the unit single-machine AGVC function, so that the unit is added into the plant station AGVC for control.
After the machine set is connected with the power grid, in the process of manually increasing the load, the active output of the machine set is actually increased in a step shape, and a large error exists between the active output and the power generation plan within a period of time. In the process, certain influence can be generated on the voltage and frequency of the system, and the electric energy quality and the customer experience are directly influenced. Meanwhile, the manual load increasing speed is slow, and the ticket repeating is required to be completed according to a specified flow, and the process takes a long time. .
Therefore, the comprehensive judgment of the lower limit of the unit stability area, the number of the current grid-connected units, the power generation plan, the unit active power, the unit reactive power, the AGVC operation mode, the speed regulation system and the excitation system operation mode is needed. The method for controlling the large-scale hydroelectric generating set comprises the steps of quantitatively judging the indexes which need to be focused on, prompting and alarming the indexes which do not meet the requirements, and exiting the starting-up flow.
Disclosure of Invention
The application aims to provide a control method of a large-sized hydroelectric generating set. In order to solve the technical problems existing in the background art.
In order to achieve the above purpose, the present application adopts the following technical scheme:
a control method of a large-scale hydroelectric generating set comprises the following steps:
responding to the first preset condition being met, and sending out a starting instruction;
controlling an outlet disconnecting link to execute a first preset action, and determining whether a second preset condition is met based on the execution of the first preset action;
starting a unit technology water supply system in response to the second preset condition being met;
determining whether a third preset condition is met based on operation of the crew technical water supply system;
in response to the third preset condition being met, starting auxiliary equipment;
determining whether a fourth preset condition is satisfied based on the operation of the auxiliary equipment;
in response to the fourth preset condition being met, starting a hydraulic system;
determining whether a fifth preset condition is satisfied based on operation of the hydraulic system;
starting a high-pressure oil system in response to the fifth preset condition being met;
determining whether a sixth preset condition is satisfied based on operation of the high pressure oil system;
in response to the sixth preset condition being met, actuating a barrel valve;
determining whether a seventh preset condition is satisfied based on the operation of the barrel valve;
performing a pull-lock operation in response to the seventh preset condition being met;
determining whether an eighth preset condition is satisfied based on the execution of the pull-lock operation;
starting a speed regulator in response to the eighth preset condition being met;
determining whether a ninth preset condition is satisfied based on operation of the governor;
performing a throw-excitation operation in response to the ninth preset condition being satisfied;
determining whether a tenth preset condition is satisfied based on execution of the excitation operation;
in response to the tenth preset condition being met, performing a grid-tie operation;
determining whether an eleventh preset condition is satisfied based on the execution of the grid-connected operation;
in response to the eleventh preset condition being met, performing a preset unit operation;
determining whether a twelfth preset condition is satisfied based on the execution of the preset unit operation;
performing a loading operation in response to the twelfth preset condition being satisfied;
determining whether a thirteenth preset condition is satisfied based on the execution of the loading operation;
ending the flow in response to the thirteenth preset condition being met;
and triggering an early warning process in response to any one of the second preset condition to the thirteenth preset condition not being met.
In some embodiments, the second preset condition includes generator outlet isolation knife switch closing position action and switch off position return.
In some embodiments, the three preset conditions include normal operation of the unit technology water supply system, normal flow of unit cooling water, and normal operation of the unit technology water supply pump.
In some embodiments, the four preset conditions include that the pit heater is out, the upper oil mist absorbing device is in normal operation, the oil mist absorbing device is deduced to be in normal operation, and the carbon powder collecting device is in normal operation.
In some embodiments, the fifth preset condition includes normal operation of the governor hydraulic system, opening of the isolation valve of the governor hydraulic system in place, pressure of the governor hydraulic system being greater than the first preset value, pressure oil tank level of the governor hydraulic system being greater than the second preset value, dropping of the brake damper, exiting of the peristaltic device, normal spindle sealing system, and hydraulic system running time reaching the third preset value.
In some embodiments, the six preset conditions include high pressure oil jack-up pump operation, high pressure oil jack-up completed, high pressure oil jack-up oil flow manifold having flow, high pressure oil jack-up oil flow manifold pressure greater than a fourth preset value, high pressure oil system operation time reaching a fifth preset value.
In some embodiments, the seven preset conditions include barrel valve full open, barrel valve full articulation point reset; the eighth preset condition comprises resetting of the locking input node, locking and withdrawing, flow of the high-pressure oil jacking oil flow main pipe, pressure of the high-pressure oil jacking oil flow main pipe being larger than a fourth preset value, and operation time of locking and pulling out of the brake air brake is up to a sixth preset value.
In some embodiments, the ninth preset condition includes the rotational speed of the governor being greater than a preset threshold, the governor run time reaching a seventh preset value; the tenth preset condition comprises that the voltage of the machine end is larger than an eighth preset value, and the electric adjustment result of the speed regulator meets the preset condition.
In some embodiments, the eleventh preset condition includes that the outlet circuit breaker of the generator is switched on, the automatic standard isolator is normal, the outlet three-phase current and three-phase voltage are balanced, the primary frequency modulation function is started, the number of running main transformer coolers is larger than a preset number, reactive closed loop mode is put in, and reactive combined control is normal.
In some embodiments, the twelfth preset condition includes that the reactive power combined control mode of the unit is started, the reactive power closed loop mode of the unit is normal, the active power combined control of the unit is normal, and the load meets a preset load condition;
the thirteenth preset condition includes: the machine set start-up mark exits, the machine set active power combined control mode starts, the machine set reactive power combined control mode starts, the machine set active power set value is not smaller than a preset power value, and the outlet three-phase current and the three-phase voltage are balanced.
Advantageous effects
The technical scheme of the application specifically illustrates the automatic starting and load increasing process of the unit, the judging basis of the load increasing condition of the unit and the judging condition of the automatic starting and load increasing process of the unit. And after the machine set is connected with the grid, judging conditions of the machine set state, judging modes of the machine set outlet voltage and current, logic for issuing active power when the machine set is automatically loaded, and the like. According to the technical scheme, the load of the large-scale unit can be increased smoothly and rapidly; the power-on load can be increased by one-key sequential control, the intelligent and automatic level of the power station is improved, and meanwhile, the working efficiency and the accuracy are improved; and the influence on the system load, voltage and frequency can be reduced, the electric energy quality is improved, and the good experience of a user is enhanced.
Drawings
Fig. 1 is a schematic flow chart of a control method of a large-scale hydro-generator unit according to the embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
On the contrary, the application is intended to cover any alternatives, modifications, equivalents, and variations as may be included within the spirit and scope of the application as defined by the appended claims. Further, in the following detailed description of the present application, certain specific details are set forth in order to provide a better understanding of the present application. The present application will be fully understood by those skilled in the art without the details described herein.
A method for controlling a large-sized hydro-generator unit according to an embodiment of the present application will be described in detail with reference to fig. 1. It is noted that the following examples are only for explaining the present application and are not to be construed as limiting the present application.
Example 1
As shown in fig. 1, a control method of a large-sized water turbine generator set includes:
and step 1, responding to the first preset condition to be met, and sending out a starting instruction.
For example, a power-on command may be issued when a power-on to auto-load condition is satisfied.
And 2, controlling the outlet disconnecting link to execute a first preset action, and determining whether a second preset condition is met or not based on the execution of the first preset action.
In some embodiments, the second preset condition includes generator outlet isolation knife switch closing position action and switch off position return.
For example, an outlet disconnecting switch operation may be performed, including closing a generator outlet isolation disconnecting switch.
And 3, starting the unit technology water supply system in response to the second preset condition being met. When the second preset condition is met, the outlet of the large motor isolates the switch-on position of the disconnecting link, the switch-on position acts and the switch-off position is reset.
And step 4, determining whether a third preset condition is met or not based on the operation of the unit technology water supply system.
In some embodiments, the three preset conditions include normal operation of the unit technology water supply system, normal flow of unit cooling water, and normal operation of the unit technology water supply pump.
And 5, starting auxiliary equipment in response to the third preset condition being met.
And when the third preset condition is met, the unit technology water supply system operates, the unit cooling water shows the flow load, and the unit technology water supply pump operates.
The start-up assistance device comprises: the generator pit heater is provided with a fog absorbing device and a collector ring dust absorbing device.
And 6, determining whether a fourth preset condition is met or not based on the operation of the auxiliary equipment.
In some embodiments, the four preset conditions include that the pit heater is out, the upper oil mist absorbing device is in normal operation, the oil mist absorbing device is deduced to be in normal operation, and the carbon powder collecting device is in normal operation.
And 7, starting the hydraulic system in response to the fourth preset condition being met.
And when the fourth preset condition is met, the pit heater exits, the upper oil mist absorbing device operates normally, and the oil mist absorbing device is deduced to operate normally, so that the carbon powder collecting device operates normally.
The starting hydraulic system comprises: starting a speed regulator hydraulic system, exiting the peristaltic device and removing the air brake.
And 8, determining whether a fifth preset condition is met or not based on the operation of the hydraulic system.
In some embodiments, the fifth preset condition includes normal operation of the governor hydraulic system, opening of the isolation valve of the governor hydraulic system in place, pressure of the governor hydraulic system being greater than the first preset value, pressure oil tank level of the governor hydraulic system being greater than the second preset value, dropping of the brake damper, exiting of the peristaltic device, normal spindle sealing system, and hydraulic system running time reaching the third preset value.
And 9, starting the high-pressure oil system in response to the fifth preset condition being met.
When the fifth preset condition is met, the speed regulator hydraulic system operates, the isolation valve of the speed regulator hydraulic system is opened, the related pressure of the speed regulator hydraulic system is more than 5.9MPa, the oil level of the pressure oil tank of the speed regulator hydraulic system is more than 1500mm, the system pipeline pressure of the speed regulator hydraulic system is more than 5.9MPa, the brake air brake falls down, the peristaltic device exits, the main shaft sealing system is normal, and the operation time of the hydraulic system reaches 4s. Starting the high pressure oil system may refer to throwing in the high pressure oil jack-up system.
And step 10, determining whether a sixth preset condition is met or not based on the operation of the high-pressure oil system.
In some embodiments, the six preset conditions include high pressure oil jack-up pump operation, high pressure oil jack-up completed, high pressure oil jack-up oil flow manifold having flow, high pressure oil jack-up oil flow manifold pressure greater than a fourth preset value, high pressure oil system operation time reaching a fifth preset value.
And 11, starting the barrel valve in response to the sixth preset condition being met.
When the sixth preset condition is met, the high-pressure oil jacking pump is put in, the high-pressure oil jacking is finished, the high-pressure oil jacking oil flow main pipe has flow, the pressure of the high-pressure oil jacking oil flow main pipe is more than 8MPa, and the running time of the high-pressure oil system is 10s.
Step 12, determining whether a seventh preset condition is met based on the operation of the barrel valve.
In some embodiments, the seven preset conditions include barrel valve full open, barrel valve full articulation point reset.
And 13, responding to the seventh preset condition to be met, and executing the pulling locking operation.
When the seventh preset condition is satisfied, the barrel valve is fully opened and the barrel valve full joint point is restored.
And step 14, determining whether an eighth preset condition is met or not based on the execution of the pulling locking operation.
In some embodiments; the eighth preset condition comprises resetting of the locking input node, locking and withdrawing, flow of the high-pressure oil jacking oil flow main pipe, pressure of the high-pressure oil jacking oil flow main pipe being larger than a fourth preset value, and operation time of locking and pulling out of the brake air brake is up to a sixth preset value.
And 15, starting the speed regulator in response to the eighth preset condition being met.
And when the eighth preset condition is met, locking the input node to reset, locking the exit action, enabling the high-pressure oil jack-up oil flow main pipe to have flow, enabling the pressure of the high-pressure oil jack-up oil flow main pipe to be larger than 8MPa, and enabling the brake air brake to fall down and pulling out and locking operation to run for 5 seconds.
The start speed regulator includes: the speed regulator is started and the electromagnetic valve is stopped.
And step 16, determining whether a ninth preset condition is met based on the operation of the speed regulator.
In some embodiments, the ninth preset condition includes the rotational speed of the governor being greater than a preset threshold, the governor run time reaching a seventh preset value.
And step 17, performing excitation throwing operation in response to the ninth preset condition being met.
When the ninth preset condition is met, the rotating speed of the speed regulator is greater than 90% or 95% of the preset speed value, and the running time of the speed regulator reaches 8 minutes.
And step 18, determining whether a tenth preset condition is met or not based on the execution of the excitation operation.
In some embodiments, the tenth preset condition includes that the machine side voltage is greater than an eighth preset value, and the electric adjustment result of the speed regulator meets a preset condition.
And step 19, responding to the tenth preset condition to be met, and executing grid-connected operation.
When the tenth preset condition is met, the machine end voltage is greater than 90% of the preset voltage value, and the electric adjustment result of the speed regulator meets the preset condition, for example, the electric adjustment of the speed regulator has no serious fault.
The grid-connected operation comprises a synchronous switching-on power supply of the switching-off circuit breaker, a synchronous voltage switching-on device, an automatic quasi-synchronous switching-on device, an automatic control (AVR) mode permission and an automatic quasi-synchronous switching-on device.
And step 20, determining whether an eleventh preset condition is met or not based on the execution of the grid-connected operation.
In some embodiments, the eleventh preset condition includes that the outlet breaker of the generator is switched on, automatic quasi-synchronization is ready, the outlet three-phase current and three-phase voltage are balanced, a primary frequency modulation function is started, the number of running main transformer coolers is larger than a preset number, reactive closed loop mode is put into, and reactive joint control is normal.
And step 21, responding to the eleventh preset condition to execute preset unit operation.
When the eleventh preset condition is met, the circuit breaker at the outlet of the generator is switched on, the automatic standard and the device are ready, the three-phase current and the three-phase voltage at the outlet are balanced, the primary frequency modulation function is put into operation, the number of the main transformer coolers is more than 3, the reactive closed loop mode is put into operation, and reactive combined control is allowed.
The preset unit operation comprises the following steps: and setting reactive power of the unit to be 0MVar, setting active power of the unit to be 20MVar, and putting into a reactive power combined control mode of the unit.
Step 22, determining whether a twelfth preset condition is met based on the execution of the preset unit operation.
In some embodiments, the twelfth preset condition includes that the reactive power combined control mode of the unit is started, the reactive power closed loop mode of the unit is normal, the active power combined control of the unit is normal, and the load meets a preset load condition.
And step 23, performing loading operation in response to the twelfth preset condition being met.
When the twelfth preset condition is met, the reactive power combined control mode input of the unit, the reactive power closed-loop mode of the unit, the active power combined control permission of the unit and the load meet the preset load condition, for example, according to the factory-level AGC operation mode, the load meets the following conditions: the difference value between the power plant active set value and the total active lower limit value is not smaller than the single-machine active lower limit.
The loading operation comprises the step of switching on a starting sign and the step of active joint control of a switching-on group.
Step 24, based on the execution of the loading operation, determining whether a thirteenth preset condition is satisfied.
The thirteenth preset condition includes: the machine set start-up mark exits, the machine set active power combined control mode starts, the machine set reactive power combined control mode starts, the machine set active power set value is not smaller than a preset power value, and the outlet three-phase current and the three-phase voltage are balanced.
And step 25, ending the process in response to the thirteenth preset condition being met.
When the thirteenth preset condition is met, the unit start-up sign exits, the unit active combined control mode is input, the unit reactive combined control mode is input, the unit active set value is not smaller than a preset power value (such as the difference value between the average active power set value of the right grid-connected unit and 50 MW), and the outlet three-phase current and three-phase voltage are balanced.
And step 26, triggering an early warning process in response to any one of the second preset condition to the thirteenth preset condition not being met.
The early warning process may include issuing an alarm and exiting the process.
The startup sign function pressing plate is used for controlling the system to automatically issue the active power of the unit according to a certain step length, and automatically putting the unit single machine AGC into the unit after the average distribution of the active load of the unit and the active loads of all grid-connected units which are added with AGC combined control is met, and exiting the startup sign.
The three-phase current balance judging conditions of the generator outlet comprise: the difference value between the maximum value and the minimum value of the three-phase current at the outlet of the generator is not larger than the preset current difference value; the three-phase voltage balance judging conditions of the generator outlet comprise: the difference between the maximum value and the minimum value of the three-phase voltage at the outlet of the generator is not larger than the preset voltage difference.
In summary, the technical scheme of the application specifically illustrates the flow of increasing the load when the unit is automatically started, the judgment basis of the condition of increasing the load when the unit is automatically started, and the judgment condition of the flow of increasing the load when the unit is automatically started. And after the machine set is connected with the grid, judging conditions of the machine set state, judging modes of the machine set outlet voltage and current, logic for issuing active power when the machine set is automatically loaded, and the like. According to the technical scheme, the load of the large-scale unit can be increased smoothly and rapidly; the power-on load can be increased by one-key sequential control, the intelligent and automatic level of the power station is improved, and meanwhile, the working efficiency and the accuracy are improved; and the influence on the system load, voltage and frequency can be reduced, the electric energy quality is improved, and the good experience of a user is enhanced.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (10)
1. The control method of the large-scale hydroelectric generating set is characterized by comprising the following steps of:
responding to the first preset condition being met, and sending out a starting instruction;
controlling an outlet disconnecting link to execute a first preset action, and determining whether a second preset condition is met based on the execution of the first preset action;
starting a unit technology water supply system in response to the second preset condition being met;
determining whether a third preset condition is met based on operation of the crew technical water supply system;
in response to the third preset condition being met, starting auxiliary equipment;
determining whether a fourth preset condition is satisfied based on the operation of the auxiliary equipment;
in response to the fourth preset condition being met, starting a hydraulic system;
determining whether a fifth preset condition is satisfied based on operation of the hydraulic system;
starting a high-pressure oil system in response to the fifth preset condition being met;
determining whether a sixth preset condition is satisfied based on operation of the high pressure oil system;
in response to the sixth preset condition being met, actuating a barrel valve;
determining whether a seventh preset condition is satisfied based on the operation of the barrel valve;
performing a pull-lock operation in response to the seventh preset condition being met;
determining whether an eighth preset condition is satisfied based on the execution of the pull-lock operation;
starting a speed regulator in response to the eighth preset condition being met;
determining whether a ninth preset condition is satisfied based on operation of the governor;
performing a throw-excitation operation in response to the ninth preset condition being satisfied;
determining whether a tenth preset condition is satisfied based on execution of the excitation operation;
in response to the tenth preset condition being met, performing a grid-tie operation;
determining whether an eleventh preset condition is satisfied based on the execution of the grid-connected operation;
in response to the eleventh preset condition being met, performing a preset unit operation;
determining whether a twelfth preset condition is satisfied based on the execution of the preset unit operation;
performing a loading operation in response to the twelfth preset condition being satisfied;
determining whether a thirteenth preset condition is satisfied based on the execution of the loading operation;
ending the flow in response to the thirteenth preset condition being met;
and triggering an early warning process in response to any one of the second preset condition to the thirteenth preset condition not being met.
2. The method of claim 1, wherein the second predetermined condition comprises generator outlet isolation knife switch closing position action and switch off position return.
3. The method of claim 2, wherein the three preset conditions include normal operation of a crew technical water supply system, normal crew cooling water flow indication, and normal crew technical water supply pump operation.
4. A method according to claim 3, wherein the four preset conditions include machine pit heater exit, upper oil mist absorbing means normal operation, deducing oil mist absorbing means normal operation, carbon dust collecting means normal operation.
5. The method of claim 4, wherein the fifth preset condition comprises normal operation of the governor hydraulic system, opening of the governor hydraulic system isolation valve in place, pressure of the governor hydraulic system being greater than a first preset value, pressure tank oil level of the governor hydraulic system being greater than a second preset value, brake air brake falling, peristaltic device exiting, normal spindle sealing system, hydraulic system operating time reaching a third preset value.
6. The method of claim 5, wherein the six preset conditions include high pressure oil jack-up pump operation, high pressure oil jack-up completed, high pressure oil jack-up manifold flow, high pressure oil jack-up manifold pressure greater than a fourth preset value, high pressure oil system run time up to a fifth preset value.
7. The method of claim 6, wherein the seven preset conditions include barrel valve full open, barrel valve full articulation point reset; the eighth preset condition comprises resetting of the locking input node, locking and withdrawing, flow of the high-pressure oil jacking oil flow main pipe, pressure of the high-pressure oil jacking oil flow main pipe being larger than a fourth preset value, and operation time of locking and pulling out of the brake air brake is up to a sixth preset value.
8. The method of claim 7, wherein the ninth preset condition includes a speed of the governor being greater than a preset threshold and a governor run time reaching a seventh preset value; the tenth preset condition comprises that the voltage of the machine end is larger than an eighth preset value, and the electric adjustment result of the speed regulator meets the preset condition.
9. The method of claim 8, wherein the eleventh preset condition includes a generator outlet breaker closing, an automatic standard and normal, an outlet three-phase current and three-phase voltage balancing, a primary frequency modulation function starting, a main transformer cooler running number greater than a preset number, a reactive closed loop mode input, and a reactive combined control normal.
10. The method of claim 9, wherein the twelfth preset condition comprises a unit reactive combined control mode start, a unit reactive closed loop mode normal, a unit active combined control normal, a load meeting a preset load condition;
the thirteenth preset condition includes: the machine set start-up mark exits, the machine set active power combined control mode starts, the machine set reactive power combined control mode starts, the machine set active power set value is not smaller than a preset power value, and the outlet three-phase current and the three-phase voltage are balanced.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118646075A (en) * | 2024-06-28 | 2024-09-13 | 海南蓄能发电有限公司 | Power station black start method, device, computer equipment and storage medium |
| CN120237736A (en) * | 2025-06-03 | 2025-07-01 | 南京软核科技有限公司 | Small water power distribution station AGVC system and method considering optimal voltage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118646075A (en) * | 2024-06-28 | 2024-09-13 | 海南蓄能发电有限公司 | Power station black start method, device, computer equipment and storage medium |
| CN120237736A (en) * | 2025-06-03 | 2025-07-01 | 南京软核科技有限公司 | Small water power distribution station AGVC system and method considering optimal voltage |
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