CN113790096A - Operation control method for variable frequency fan of gas generator set - Google Patents
Operation control method for variable frequency fan of gas generator set Download PDFInfo
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- CN113790096A CN113790096A CN202111370202.1A CN202111370202A CN113790096A CN 113790096 A CN113790096 A CN 113790096A CN 202111370202 A CN202111370202 A CN 202111370202A CN 113790096 A CN113790096 A CN 113790096A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/026—Thermostatic control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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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
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/02—Intercooler
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a method for controlling the operation of a variable frequency fan of a gas generator set, belonging to the technical field of operation control of variable frequency fans; the technical problem to be solved is as follows: the improvement of the operation control method of the variable frequency fan of the gas generator set is provided; the technical scheme for solving the technical problems is as follows: the method comprises the following steps: starting the gas turbine, and respectively controlling the starting and stopping of a cylinder sleeve water cooling system and an inter-cooling water cooling system according to the starting and stopping of a cylinder sleeve water pump/an inter-cooling water pump after the gas turbine is started; after the cylinder sleeve water cooling system and the intercooling water cooling system are started, the cylinder sleeve water cooling system and the intercooling water cooling system are automatically controlled to work through the PLC control system according to the temperature of the measuring point; the PLC control system controls the number and frequency of fans of the cylinder sleeve water cooling system through the temperature of a measuring point of a cylinder sleeve water outlet and/or the load of a combustion engine; the PLC control system controls the number and frequency of fans of the cylinder liner water cooling system through the temperature of a measuring point of the intercooling water outlet and/or the load of the combustion engine; the invention is applied to the gas generator set.
Description
Technical Field
The invention discloses an operation control method for a variable frequency fan of a gas generator set, and belongs to the technical field of operation control of variable frequency fans of gas generator sets.
Background
Each combustion engine of the existing gas generator set is equipped with two remote radiators which are an intercooling water cooling system and a cylinder liner water cooling system respectively, and the two cooling systems are independent respectively. Each remote radiator is provided with three radiating fans, and each fan is provided with a frequency converter. After the combustion engine is started, the central cooling water and the cylinder sleeve water are cooled through the remote radiator, so that part of heat absorbed by heated parts of the unit can be timely dissipated, and the engine is ensured to work in a proper temperature state. Each fan is provided with a frequency converter, the control mode at present is that after a control command is given, the fan is started in a frequency conversion mode, the fan is loaded to 50HZ for operation after being started, the frequency cannot be adjusted after the fan is started, and the electric energy and the effect of the frequency converter are greatly wasted.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to solve the technical problems that: the improvement of the operation control method of the variable frequency fan of the gas generator set is provided.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for controlling the operation of a variable frequency fan of a gas generator set comprises the following steps:
the method comprises the following steps: starting the gas turbine, controlling the starting and stopping of the cylinder liner water cooling system according to the starting and stopping of the cylinder liner water pump after the gas turbine is started, and controlling the starting and stopping of the intercooling water cooling system according to the starting and stopping of the intercooling water pump;
step two: after the cylinder sleeve water cooling system and the intercooling water cooling system are started, the cylinder sleeve water cooling system and the intercooling water cooling system are automatically controlled to work through the PLC control system according to the temperature of the measuring point; the temperature of the measuring point is acquired through temperature sensors arranged at the water outlets of the cylinder liner and the intercooling water;
step three: the PLC control system controls the number and frequency of fans of the cylinder sleeve water cooling system through the temperature of a measuring point of the cylinder sleeve water outlet and/or the load of the combustion engine, so that the temperature change of the cylinder sleeve water outlet is controlled within a set range;
step four: the PLC control system controls the number and frequency of fans of the cylinder liner water cooling system through the temperature of a measuring point of the intercooling water outlet and/or the load of the combustion engine, so that the temperature change of the intercooling water outlet is controlled within a set range.
The temperature of a measuring point for controlling the starting of the cylinder sleeve water cooling system and the intercooling water cooling system in the second step is respectively the highest temperature set at a cylinder sleeve water outlet and an intercooling water outlet;
the cylinder sleeve water cooling system and the inter-cooling water cooling system are respectively provided with three cooling fans, wherein at least one fan is a variable frequency fan.
And in the third step, the cylinder liner water cooling system is automatically controlled through measuring the point temperature, and the method comprises the following steps:
when the temperature of a measuring point at a water outlet of the cylinder sleeve reaches a set first highest temperature, firstly starting a variable-frequency control fan to operate;
when the frequency of the variable-frequency controlled fan reaches the set highest frequency, starting the first power-frequency controlled fan to operate, and adjusting the frequency of the variable-frequency operated fan according to the temperature change;
when the temperature of a measuring point at the water outlet of the cylinder sleeve is gradually increased, and when the frequency of the variable-frequency fan reaches the set highest frequency again, starting a second power frequency control fan, and adjusting the frequency of the variable-frequency running fan according to the temperature change;
when the temperature of a measuring point at the water outlet of the cylinder sleeve is reduced, stopping one power frequency fan when the frequency of the variable-frequency running fan reaches the lowest set frequency, and running the remaining variable-frequency running fan, wherein the variable-frequency running fan adjusts the frequency according to the temperature change;
when the temperature of the measuring point of the water outlet of the cylinder sleeve is reduced again and the frequency of the variable-frequency running fan is reduced to the lowest set frequency again, stopping one power frequency fan, and only one variable-frequency fan is left to run, wherein the frequency of the variable-frequency running fan is adjusted according to the temperature change.
In the fourth step, the step of automatically controlling the cooling system of the chilled water through the temperature of the measuring point comprises the following steps:
when the temperature of a middle cold water outlet measuring point reaches a set second highest temperature, firstly starting a variable frequency control fan to operate;
when the frequency of the variable-frequency controlled fan reaches the set highest frequency, starting the first power-frequency controlled fan to operate, and adjusting the frequency of the variable-frequency operated fan according to the temperature change;
gradually increasing the temperature of the middle cold water outlet measuring point, and starting a second power frequency control fan when the frequency of the variable frequency fan reaches the set highest frequency again, wherein the frequency of the variable frequency fan is adjusted according to the temperature change;
when the temperature of a central cold water outlet measuring point is reduced, stopping one power frequency fan when the frequency of the variable frequency running fan reaches the lowest set frequency, and remaining one variable frequency running fan to run at the power frequency, wherein the variable frequency running fan adjusts the frequency according to the temperature change;
when the temperature of the central cold water outlet measuring point is reduced again and the frequency of the variable-frequency operation fan is reduced to the lowest set frequency again, stopping one power frequency fan, and only one variable-frequency fan is left to operate, wherein the frequency of the variable-frequency operation fan is adjusted according to the temperature change.
In the temperature rising stage, the frequency conversion fan adjusts the frequency according to the temperature change by the following steps:
the method comprises the following steps of setting the temperature of the water outlet in the operation process, wherein the first step is a medium-low temperature stage, the second step is a medium-high temperature stage, the variable frequency fan keeps the set lowest frequency operation in the operation process of the first step, and the frequency of the variable frequency fan is adjusted to be increased in the second step according to the temperature increase until the set highest operation frequency is reached.
In the temperature reduction stage, the frequency conversion fan adjusts the frequency according to the temperature change by the following steps:
the step of setting the temperature of the water outlet in the operation process comprises two stages, wherein the first stage is a medium-high temperature stage, the second stage is a medium-low temperature stage, the frequency of the variable frequency fan is adjusted to be reduced according to the reduction of the temperature in the first stage until the set lowest operation frequency is reached, and the variable frequency fan keeps the set lowest frequency to operate in the operation process of the second stage.
And the PLC control system accumulates the running time of each fan and preferentially starts the fan with the shortest accumulated running time each time when the fan is controlled to start and stop.
After the temperature signal of the measuring point is failed or lost, or the control system fails due to other reasons, all fans are started to ensure the normal operation of the combustion engine, an alarm signal is sent out, and the frequency conversion fan is required to be frequency-increased to the full frequency for operation.
Compared with the prior art, the invention has the beneficial effects that: according to the operation control method of the variable frequency fan of the gas generator set, the starting, stopping and input quantity of the cooling fan and the frequency of the frequency converter in the operation process of the gas generator set are adjusted in real time through the temperature measuring points of the outlets of the cylinder sleeve water and the inter-cooling water in combination with the load condition, so that the temperatures of the outlets of the cylinder sleeve water and the inter-cooling water can be kept within a set range all the time, the electricity-saving and energy-saving operation of the frequency converter can be realized to the greatest extent, the working efficiency is improved, and the energy loss is reduced.
Drawings
The invention is further described below with reference to the accompanying drawings:
fig. 1 is a flow chart of a method for controlling the operation of a variable frequency fan according to the present invention.
Detailed Description
As shown in fig. 1, the method for controlling the operation of the variable frequency fan of the gas generator set comprises the following steps:
the method comprises the following steps: starting the gas turbine, controlling the starting and stopping of the cylinder liner water cooling system according to the starting and stopping of the cylinder liner water pump after the gas turbine is started, and controlling the starting and stopping of the intercooling water cooling system according to the starting and stopping of the intercooling water pump;
step two: after the cylinder sleeve water cooling system and the intercooling water cooling system are started, the cylinder sleeve water cooling system and the intercooling water cooling system are automatically controlled to work through the PLC control system according to the temperature of the measuring point; the temperature of the measuring point is acquired through temperature sensors arranged at the water outlets of the cylinder liner and the intercooling water;
step three: the PLC control system controls the number and frequency of fans of the cylinder sleeve water cooling system through the temperature of a measuring point of the cylinder sleeve water outlet and/or the load of the combustion engine, so that the temperature change of the cylinder sleeve water outlet is controlled within a set range;
step four: the PLC control system controls the number and frequency of fans of the cylinder liner water cooling system through the temperature of a measuring point of the intercooling water outlet and/or the load of the combustion engine, so that the temperature change of the intercooling water outlet is controlled within a set range.
The temperature of a measuring point for controlling the starting of the cylinder sleeve water cooling system and the intercooling water cooling system in the second step is respectively the highest temperature set at a cylinder sleeve water outlet and an intercooling water outlet;
the cylinder sleeve water cooling system and the inter-cooling water cooling system are respectively provided with three cooling fans, wherein at least one fan is a variable frequency fan.
And in the third step, the cylinder liner water cooling system is automatically controlled through measuring the point temperature, and the method comprises the following steps:
when the temperature of a measuring point at a water outlet of the cylinder sleeve reaches a set first highest temperature, firstly starting a variable-frequency control fan to operate;
when the frequency of the variable-frequency controlled fan reaches the set highest frequency, starting the first power-frequency controlled fan to operate, and adjusting the frequency of the variable-frequency operated fan according to the temperature change;
when the temperature of a measuring point at the water outlet of the cylinder sleeve is gradually increased, and when the frequency of the variable-frequency fan reaches the set highest frequency again, starting a second power frequency control fan, and adjusting the frequency of the variable-frequency running fan according to the temperature change;
when the temperature of a measuring point at the water outlet of the cylinder sleeve is reduced, stopping one power frequency fan when the frequency of the variable-frequency running fan reaches the lowest set frequency, and running the remaining variable-frequency running fan, wherein the variable-frequency running fan adjusts the frequency according to the temperature change;
when the temperature of the measuring point of the water outlet of the cylinder sleeve is reduced again and the frequency of the variable-frequency running fan is reduced to the lowest set frequency again, stopping one power frequency fan, and only one variable-frequency fan is left to run, wherein the frequency of the variable-frequency running fan is adjusted according to the temperature change.
In the fourth step, the step of automatically controlling the cooling system of the chilled water through the temperature of the measuring point comprises the following steps:
when the temperature of a middle cold water outlet measuring point reaches a set second highest temperature, firstly starting a variable frequency control fan to operate;
when the frequency of the variable-frequency controlled fan reaches the set highest frequency, starting the first power-frequency controlled fan to operate, and adjusting the frequency of the variable-frequency operated fan according to the temperature change;
gradually increasing the temperature of the middle cold water outlet measuring point, and starting a second power frequency control fan when the frequency of the variable frequency fan reaches the set highest frequency again, wherein the frequency of the variable frequency fan is adjusted according to the temperature change;
when the temperature of a central cold water outlet measuring point is reduced, stopping one power frequency fan when the frequency of the variable frequency running fan reaches the lowest set frequency, and remaining one variable frequency running fan to run at the power frequency, wherein the variable frequency running fan adjusts the frequency according to the temperature change;
when the temperature of the central cold water outlet measuring point is reduced again and the frequency of the variable-frequency operation fan is reduced to the lowest set frequency again, stopping one power frequency fan, and only one variable-frequency fan is left to operate, wherein the frequency of the variable-frequency operation fan is adjusted according to the temperature change.
In the temperature rising stage, the frequency conversion fan adjusts the frequency according to the temperature change by the following steps:
the method comprises the following steps of setting the temperature of the water outlet in the operation process, wherein the first step is a medium-low temperature stage, the second step is a medium-high temperature stage, the variable frequency fan keeps the set lowest frequency operation in the operation process of the first step, and the frequency of the variable frequency fan is adjusted to be increased in the second step according to the temperature increase until the set highest operation frequency is reached.
In the temperature reduction stage, the frequency conversion fan adjusts the frequency according to the temperature change by the following steps:
the step of setting the temperature of the water outlet in the operation process comprises two stages, wherein the first stage is a medium-high temperature stage, the second stage is a medium-low temperature stage, the frequency of the variable frequency fan is adjusted to be reduced according to the reduction of the temperature in the first stage until the set lowest operation frequency is reached, and the variable frequency fan keeps the set lowest frequency to operate in the operation process of the second stage.
And the PLC control system accumulates the running time of each fan and preferentially starts the fan with the shortest accumulated running time each time when the fan is controlled to start and stop.
After the temperature signal of the measuring point is failed or lost, or the control system fails due to other reasons, all fans are started to ensure the normal operation of the combustion engine, an alarm signal is sent out, and the frequency conversion fan is required to be frequency-increased to the full frequency for operation.
The operation control method of the variable frequency fan of the gas generator set provided by the invention mainly automatically controls the number and the frequency of start-stop fans of respective frequency converters through the temperatures of water outlets of a cold water cooling system and a cylinder sleeve water cooling system in a radiator. In order to realize the simultaneous automatic control of the central cold water cooling system and the cylinder sleeve water cooling system, the invention removes the control circuit for controlling the two remote radiators in the existing control cabinet, uses the starting signal of the gas turbine, namely the starting and stopping signal of the cylinder sleeve water pump/the inter-cooling water pump to put in and withdraw from the two remote radiator automatic control systems, and controls the number and the frequency of the motors for starting and stopping the two remote radiators according to the temperature of a water outlet after the systems are put in.
The temperature measuring point is respectively arranged at the cylinder sleeve water outlet and the middle cooling water outlet of two remote radiators, and a temperature signal is transmitted back to the PLC input module by adopting a PT100 temperature sensor. The temperature measuring range of the temperature measuring point sensor is selected from-50 degrees to 150 degrees.
When the combustion engine is started, a command that the PLC automatically starts to control the two remote radiators is sent, at the moment, only the PLC control system is put into operation, and the two remote radiator fans are not always started immediately. The two remote radiator fans determine whether to start the fans according to whether the temperature of a measuring point received after the PLC control system is put into use reaches a preset value. The preset temperature value can be adjusted by the peripheral equipment at any time.
And the PLC controls the number and frequency of the starting and stopping of three frequency converter fans of the cylinder sleeve water/the inter-cooling water according to the set temperature by detecting the temperature change. When the two remote radiator fans are started according to the change of the outlet temperatures of the two remote radiators, the system can adjust the frequency and the number of the fans according to the deviation of the temperature of the measuring point and the preset value. Each frequency converter respectively controls a fan, one of the frequency converters is used for frequency conversion when in actual use, and the other two frequency converters are used for power frequency. The three fans can be controlled by frequency conversion, or the three fans can be switched between power frequency and frequency conversion, but in the operation process, one fan is set to work by frequency conversion, and the other two fans work by power frequency.
The variable frequency operation control of the fan according to the present invention will be described in detail below according to a specific embodiment.
Example 1: two long-range radiator cooling systems of cylinder liner water:
in the embodiment, the temperature control range of the water outlet of the cylinder sleeve is set to be 20-65 ℃, the temperature control range of the middle and low temperature stage in the first stage is 20-45 ℃, and the temperature control range of the middle and high temperature stage in the second stage is 45-60 ℃.
When the temperature of the cylinder sleeve water outlet reaches the set maximum temperature of 65 ℃, firstly starting a frequency conversion controlled fan to operate, and starting a power frequency fan to operate when the frequency of the frequency conversion operated fan reaches the set maximum operating frequency of 45HZ according to the temperature change of the cylinder sleeve water outlets of the two remote radiators, wherein the frequency of the frequency conversion operated fan continues to adjust the frequency according to the temperature change; at the moment, the variable frequency fan performs variable frequency operation according to temperature reduction, when the temperature is in the second stage, the frequency of the variable frequency fan is reduced according to the temperature reduction amplitude, for example, when the temperature is gradually reduced from 60 ℃ to 45 ℃ in the second stage, the frequency is reduced by 5HZ every time the temperature is reduced by 5 ℃, and when the temperature is close to the first stage, the frequency of the variable frequency fan is kept to be 25HZ operation.
And along with the temperature rise of the water outlets of the two remote radiator cylinder sleeves, the temperature rising part also comprises a first stage and a second stage, similarly, the frequency converter keeps 25HZ operation in the first stage, when the temperature rises gradually in the second stage, the temperature rises by 5 ℃, the frequency of the variable frequency fan rises by 5HZ, and when the frequency of the variable frequency fan reaches 45HZ again, the second power frequency fan is started. At the moment, the frequency is reduced in the process of continuously reducing the temperature, when the temperature of the water outlets of the two remote radiator cylinder sleeves is reduced, one power frequency fan is stopped when the frequency of the variable-frequency operation fan reaches 25HZ, and the other variable-frequency operation fan is operated at one power frequency; when the temperature of the water outlets of the two remote radiator cylinder sleeves is reduced again, the frequency of the variable-frequency operation fan is reduced to 25HZ again, one power-frequency fan is stopped, and only one variable-frequency fan is left to operate. After the system is started, the power frequency fan is automatically increased or decreased and the frequency conversion rotating speed is automatically adjusted within the required range according to the temperature change of the water outlets of the two remote radiator cylinder sleeves.
Example 2: two remote radiator cooling systems of well cold water:
in the embodiment, the temperature control range of the water outlet of the cylinder sleeve is set to be 20-45 ℃, the temperature control range of the middle and low temperature stage in the first stage is 20-30 ℃, and the temperature control range of the high temperature stage in the second stage is 30-45 ℃.
When the temperature of the middle cold water outlet reaches the set highest temperature of 45 ℃, starting a power frequency fan to operate when the frequency of the fan in variable frequency operation reaches 45HZ according to the temperature change of the cold water outlets in the two remote radiators, and continuing to adjust the frequency according to the temperature change of the fan in variable frequency operation; at the moment, the variable frequency fan performs variable frequency operation according to temperature reduction, when the temperature is in the second stage, the frequency of the variable frequency fan is reduced according to the temperature reduction amplitude, for example, when the temperature is gradually reduced from 45 ℃ to 30 ℃ in the second stage, the frequency is reduced by 5HZ every time the temperature is reduced by 3 ℃, and when the temperature is close to the first stage, the frequency of the variable frequency fan is kept to be 25HZ operation.
And (4) starting the second power frequency fan when the frequency of the fan in variable frequency operation reaches 45HZ again along with the temperature rise of the cold water outlet in the two remote radiators. The temperature rising part also comprises a first stage and a second stage, wherein the frequency converter keeps 25HZ operation in the first stage, when the temperature is gradually raised in the second stage, the temperature is raised by 3 ℃, the frequency of the variable frequency fan is raised by 5HZ, and when the frequency of the variable frequency fan reaches 45HZ again, the second power frequency fan is started. At the moment, the frequency is reduced in the process of continuously reducing the temperature, when the temperature of the cold water outlet of the two remote radiators is reduced, one power frequency fan is stopped when the frequency of the variable-frequency operation fan reaches 25HZ, and the other variable-frequency operation fan is operated at one power frequency; when the temperature of the cold water outlet of the two remote radiators is reduced again, the frequency of the frequency conversion operation fan is reduced to 25HZ again, one power frequency fan is stopped, and only one frequency conversion fan is left to operate. And after the system is started, the power frequency fan is automatically increased or decreased and the frequency conversion rotating speed is automatically adjusted within the required range according to the temperature change of cold water outlets in the two remote radiators.
The temperature ranges of the first stage and the second stage set in the above embodiment and the frequency variation amplitude of the variable frequency fan during the temperature rise and the temperature fall can be set according to the actual conditions, the embodiment is explained as a specific embodiment, and the temperature ranges of the cylinder liner water and the intercooling water outlet can be set according to the actual conditions, and the temperature ranges of the medium-low temperature stage and the medium-high temperature stage can be adjusted according to the actual conditions of the operation and the load of the gas generator set.
The invention accumulates the running time of each fan in the program, and the fan is started with the priority of the shortest accumulated running time each time when the start and the stop of the fan are controlled.
The cylinder sleeve water cooling system and the inter-cooling water cooling system can be set in a local/remote mode, wherein the remote mode is on a touch screen, and the local mode is on the local of two remote radiator control cabinets.
The invention can set a manual mode/an automatic mode for starting and stopping the fan and setting the frequency of the variable frequency fan, wherein the manual mode can manually start and stop any fan on the touch screen, and the variable frequency fan can also manually adjust the frequency and the rotating speed. The fault may be reset. The automatic mode follows the above description.
The invention sets that when the frequency converter or the fan fails to start, for example, the frequency converter reports a fault, or the starting is not successful for other reasons, the next one is automatically started, and the working of two remote radiators cannot be influenced when a certain fan or frequency converter fails.
According to the invention, the touch screen is arranged on the fan control cabinet, so that the current and frequency signals of the variable-frequency running fan and the faults and running states of all fans can be monitored; monitoring the temperature of a measuring point of the radiator; fault log, profile, equipment status. The touch screen can be started, stopped, reset to failure and given in frequency.
The invention also sets that all fans are started and send out alarm signals to ensure the normal operation of the combustion engine when the temperature signals are failed or lost or the control system fails due to other reasons. The frequency conversion unit needs to operate from frequency to full frequency, so that heat dissipation is output to the maximum extent, and normal work of the radiator is guaranteed.
The alarm signal set by the fan control system comprises: temperature signal disconnection and other faults, frequency converter faults, starting faults and the like.
The invention specifically adopts 6 frequency converters with the models of Yinweisen GD200A-011G/015P-416 to respectively control one fan, and the adopted PLC control system is a PLC Siemens smart200 sr 30. 1 temperature input module AR04, 1 analog input module AE04, 1 analog output module AQ04, and 1 24-volt power supply are provided.
It should be noted that, regarding the specific structure of the present invention, the connection relationship between the modules adopted in the present invention is determined and can be realized, except for the specific description in the embodiment, the specific connection relationship can bring the corresponding technical effect, and the technical problem proposed by the present invention is solved on the premise of not depending on the execution of the corresponding software program.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The operation control method of the variable frequency fan of the gas generator set is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: starting the gas turbine, controlling the starting and stopping of the cylinder liner water cooling system according to the starting and stopping of the cylinder liner water pump after the gas turbine is started, and controlling the starting and stopping of the intercooling water cooling system according to the starting and stopping of the intercooling water pump;
step two: after the cylinder sleeve water cooling system and the intercooling water cooling system are started, the cylinder sleeve water cooling system and the intercooling water cooling system are automatically controlled to work through the PLC control system according to the temperature of the measuring point; the temperature of the measuring point is acquired through temperature sensors arranged at the water outlets of the cylinder liner and the intercooling water;
step three: the PLC control system controls the number and frequency of fans of the cylinder sleeve water cooling system through the temperature of a measuring point of the cylinder sleeve water outlet and/or the load of the combustion engine, so that the temperature change of the cylinder sleeve water outlet is controlled within a set range;
step four: the PLC control system controls the number and frequency of fans of the cylinder liner water cooling system through the temperature of a measuring point of the intercooling water outlet and/or the load of the combustion engine, so that the temperature change of the intercooling water outlet is controlled within a set range.
2. The operation control method of the gas generator set variable frequency fan according to claim 1, characterized in that: the temperature of a measuring point for controlling the starting of the cylinder sleeve water cooling system and the intercooling water cooling system in the second step is respectively the highest temperature set at a cylinder sleeve water outlet and an intercooling water outlet;
the cylinder sleeve water cooling system and the inter-cooling water cooling system are respectively provided with three cooling fans, wherein at least one fan is a variable frequency fan.
3. The operation control method of the gas generator set variable frequency fan according to claim 2, characterized in that: and in the third step, the cylinder liner water cooling system is automatically controlled through measuring the point temperature, and the method comprises the following steps:
when the temperature of a measuring point at a water outlet of the cylinder sleeve reaches a set first highest temperature, firstly starting a variable-frequency control fan to operate;
when the frequency of the variable-frequency controlled fan reaches the set highest frequency, starting the first power-frequency controlled fan to operate, and adjusting the frequency of the variable-frequency operated fan according to the temperature change;
when the temperature of a measuring point at the water outlet of the cylinder sleeve is gradually increased, and when the frequency of the variable-frequency fan reaches the set highest frequency again, starting a second power frequency control fan, and adjusting the frequency of the variable-frequency running fan according to the temperature change;
when the temperature of a measuring point at the water outlet of the cylinder sleeve is reduced, stopping one power frequency fan when the frequency of the variable-frequency running fan reaches the lowest set frequency, and running the remaining variable-frequency running fan, wherein the variable-frequency running fan adjusts the frequency according to the temperature change;
when the temperature of the measuring point of the water outlet of the cylinder sleeve is reduced again and the frequency of the variable-frequency running fan is reduced to the lowest set frequency again, stopping one power frequency fan, and only one variable-frequency fan is left to run, wherein the frequency of the variable-frequency running fan is adjusted according to the temperature change.
4. The operation control method of the gas generator set variable frequency fan according to claim 2, characterized in that: in the fourth step, the step of automatically controlling the cooling system of the chilled water through the temperature of the measuring point comprises the following steps:
when the temperature of a middle cold water outlet measuring point reaches a set second highest temperature, firstly starting a variable frequency control fan to operate;
when the frequency of the variable-frequency controlled fan reaches the set highest frequency, starting the first power-frequency controlled fan to operate, and adjusting the frequency of the variable-frequency operated fan according to the temperature change;
gradually increasing the temperature of the middle cold water outlet measuring point, and starting a second power frequency control fan when the frequency of the variable frequency fan reaches the set highest frequency again, wherein the frequency of the variable frequency fan is adjusted according to the temperature change;
when the temperature of a central cold water outlet measuring point is reduced, stopping one power frequency fan when the frequency of the variable frequency running fan reaches the lowest set frequency, and remaining one variable frequency running fan to run at the power frequency, wherein the variable frequency running fan adjusts the frequency according to the temperature change;
when the temperature of the central cold water outlet measuring point is reduced again and the frequency of the variable-frequency operation fan is reduced to the lowest set frequency again, stopping one power frequency fan, and only one variable-frequency fan is left to operate, wherein the frequency of the variable-frequency operation fan is adjusted according to the temperature change.
5. The operation control method of the gas generator set variable frequency fan according to claim 3 or 4, characterized in that: in the temperature rising stage, the frequency conversion fan adjusts the frequency according to the temperature change by the following steps:
the method comprises the following steps of setting the temperature of the water outlet in the operation process, wherein the first step is a medium-low temperature stage, the second step is a medium-high temperature stage, the variable frequency fan keeps the set lowest frequency operation in the operation process of the first step, and the frequency of the variable frequency fan is adjusted to be increased in the second step according to the temperature increase until the set highest operation frequency is reached.
6. The operation control method of the gas generator set variable frequency fan according to claim 3 or 4, characterized in that: in the temperature reduction stage, the frequency conversion fan adjusts the frequency according to the temperature change by the following steps:
the step of setting the temperature of the water outlet in the operation process comprises two stages, wherein the first stage is a medium-high temperature stage, the second stage is a medium-low temperature stage, the frequency of the variable frequency fan is adjusted to be reduced according to the reduction of the temperature in the first stage until the set lowest operation frequency is reached, and the variable frequency fan keeps the set lowest frequency to operate in the operation process of the second stage.
7. The operation control method of the gas generator set variable frequency fan according to claim 3 or 4, characterized in that: and the PLC control system accumulates the running time of each fan and preferentially starts the fan with the shortest accumulated running time each time when the fan is controlled to start and stop.
8. The operation control method of the gas generator set variable frequency fan according to claim 3 or 4, characterized in that: after the temperature signal of the measuring point is failed or lost, or the control system fails due to other reasons, all fans are started to ensure the normal operation of the combustion engine, an alarm signal is sent out, and the frequency conversion fan is required to be frequency-increased to the full frequency for operation.
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