CN114233615A - Condensate pump switching control method and device, electronic equipment and storage medium - Google Patents
Condensate pump switching control method and device, electronic equipment and storage medium Download PDFInfo
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- CN114233615A CN114233615A CN202210013897.6A CN202210013897A CN114233615A CN 114233615 A CN114233615 A CN 114233615A CN 202210013897 A CN202210013897 A CN 202210013897A CN 114233615 A CN114233615 A CN 114233615A
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- 238000006243 chemical reaction Methods 0.000 claims description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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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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Abstract
The application discloses a switching control method and device of a condensate pump, electronic equipment and a storage medium, wherein the method is applied to the switching control device of the condensate pump and comprises the following steps: controlling the second condensate pump to operate at power frequency under the condition that the first condensate pump operates at variable frequency and the frequency converter meets a first preset condition; under the condition that the power frequency operation of the second condensate pump is normal, controlling the first condensate pump to stop the variable frequency operation, and controlling the first condensate pump to operate at the power frequency; under the condition that the first condensate pump operates normally at power frequency, controlling the second condensate pump to stop operating at power frequency; and under the condition that the second condensate pump meets a second preset condition, controlling the second condensate pump to operate in a variable frequency mode, and controlling the first condensate pump to stop operating at power frequency.
Description
Technical Field
The application belongs to the field of thermal power generation, and particularly relates to a switching control method and device of a condensate pump, electronic equipment and a storage medium.
Background
The vast majority of condensate systems used in thermal power plants include two condensate pumps with the capacity of 100%, one condensate pump runs when a unit normally runs, and the other condensate pump is reserved. According to the relevant regulations of the thermal power plant, two condensate pumps need to be switched periodically.
In a conventional thermal power plant, management personnel are generally required to remind operating personnel to perform periodic switching work on condensate pumps, and the operating personnel need to realize the periodic switching of the two condensate pumps in a manual rotation mode after receiving an order. However, when manual switching is adopted, firstly, an operator is required to record the standing book, and a manager looks up the standing book to determine the next switching time and remind the operator; secondly, the fluctuation of the condensate flow is large in the manual switching process, the manual operation needs double confirmation, the operation time is long, and the problems of the large fluctuation of the condensate flow or the large fluctuation of the liquid level of the deaerator are easily caused; thirdly, manual operation needs to depend on operation experience of operators, the operators need to be in good mental state and careful thinking, any link is in trouble, switching failure can be caused, even unit unplanned shutdown or equipment damage can be caused, uncontrollable factors are high, and personnel cultivation difficulty is high.
Disclosure of Invention
The embodiment of the application provides a switching control method and device for condensate pumps, electronic equipment and a storage medium, and can solve the problem of easy switching failure caused by manual switching of two condensate pumps in the related art.
In a first aspect, an embodiment of the present application provides a switching control method for a condensate pump, which is applied to a switching control device for a condensate pump, where the switching control device includes a first condensate pump, a second condensate pump, a frequency converter, a first contactor, and a second contactor, a bus is connected to the first condensate pump through a first circuit breaker, to the second condensate pump through a second circuit breaker, to the first condensate pump through a third circuit breaker, a frequency converter, and a first contactor, and to the second condensate pump through the third circuit breaker, the frequency converter, and the second contactor, and the method includes:
controlling the second condensate pump to operate at power frequency under the condition that the first condensate pump operates at variable frequency and the frequency converter meets a first preset condition;
under the condition that the power frequency operation of the second condensate pump is normal, controlling the first condensate pump to stop the variable frequency operation, and controlling the first condensate pump to operate at the power frequency;
under the condition that the first condensate pump operates normally at power frequency, controlling the second condensate pump to stop operating at power frequency;
and under the condition that the second condensate pump meets a second preset condition, controlling the second condensate pump to operate in a frequency conversion mode, and controlling the first condensate pump to stop operating at power frequency.
In a second aspect, an embodiment of the present application provides a switching control device of a condensate pump, including a first condensate pump, a second condensate pump, a frequency converter, a first contactor, and a second contactor, where a bus bar is connected to the first condensate pump through a first circuit breaker, connected to the second condensate pump through a second circuit breaker, connected to the first condensate pump through a third circuit breaker, the frequency converter, the first contactor, and connected to the second condensate pump through the third circuit breaker, the frequency converter, the second contactor, and the second condensate pump, the device further includes:
the first control module is used for controlling the second condensate pump to operate at power frequency under the condition that the first condensate pump operates at variable frequency and the frequency converter meets a first preset condition;
the second control module is used for controlling the first condensate pump to stop frequency conversion operation and controlling the first condensate pump to operate at power frequency under the condition that the second condensate pump operates at normal power frequency;
the third control module is used for controlling the second condensate pump to stop operating at the power frequency under the condition that the first condensate pump operates at the power frequency normally;
and the fourth control module is used for controlling the second condensate pump to operate in a frequency conversion mode and controlling the first condensate pump to stop operating in a power frequency mode under the condition that the second condensate pump meets a second preset condition.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and when executed by the processor, the program or instructions implement the steps of the method according to the first aspect.
In a fourth aspect, embodiments of the present application provide a readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the method according to the first aspect.
In a fifth aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the method according to the first aspect.
In the embodiment of the application, under the condition that the first condensate pump operates in a frequency conversion mode and the frequency converter meets a first preset condition, the second condensate pump is controlled to operate in a power frequency mode; under the condition that the power frequency operation of the second condensate pump is normal, controlling the first condensate pump to stop the variable frequency operation, and controlling the first condensate pump to operate at the power frequency; under the condition that the first condensate pump operates normally at power frequency, controlling the second condensate pump to stop operating at power frequency; under the condition that second condensate pump satisfies the second and predetermines the condition, control second condensate pump frequency conversion operation, and control first condensate pump stops the power frequency operation, can realize the accurate automatic switch-over to first condensate pump and second condensate pump, has improved condensate pump's switching success rate, has solved the problem of the switching failure that artifical switching condensate pump probably leads to among the correlation technique.
Drawings
Fig. 1 is a schematic flow chart illustrating a method for controlling switching of a condensate pump according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a switching control device of a condensate pump according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a connection of a condensate system provided by an embodiment of the present application;
FIG. 4a is a schematic flow chart illustrating another method for controlling switching of a condensate pump according to an embodiment of the present disclosure;
FIG. 4b is a schematic flow chart illustrating a method for controlling switching of a condensate pump according to an embodiment of the present disclosure;
FIG. 5 is a block diagram of a switching control apparatus for a condensate pump according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The following describes a switching control method and apparatus, an electronic device, and a storage medium of a condensate pump according to embodiments of the present application in detail through specific embodiments and application scenarios thereof with reference to the accompanying drawings.
Fig. 1 shows a switching control method of a condensate pump according to an embodiment of the present invention, which is applied to a switching control apparatus of a condensate pump shown in fig. 2.
Wherein, this switching control device includes: a first condensate pump 21, a second condensate pump 22, a first circuit breaker 23, a second circuit breaker 24, a third circuit breaker 25, a frequency converter 26, a first contactor 27, and a second contactor 28; the busbar 29 through first circuit breaker 23 with first condensate pump 21 is connected, through second circuit breaker 24 with second condensate pump 22 is connected, through third circuit breaker 25, converter 26, first contactor 27 with first condensate pump 21 is connected, and passes through third circuit breaker 25, converter 26, second contactor 28 with second condensate pump 22 is connected.
Specifically, the 10KV bus 29 supplies power to the motor of the first condensate pump 21 through the first circuit breaker 23, and when the first circuit breaker 23 is connected, the first condensate pump 21 operates at power frequency; the 10KV bus 29 supplies power to the motor of the second condensate pump 22 through the second circuit breaker 24, and when the second circuit breaker 24 is communicated, the second condensate pump operates at power frequency; the 10KV bus 29 supplies power to the motor of the first condensate pump 21 through the third circuit breaker 25, the frequency converter 26 and the first contactor 27, and when the third circuit breaker 25 is communicated, the first contactor 27 is communicated and the frequency converter 26 is started, the first condensate pump runs in a frequency conversion mode; the 10KV bus supplies power to the motor of the second condensate pump 22 through a third circuit breaker 25, a frequency converter 26 and a second contactor 28, and when the third circuit breaker 25 is communicated, the second contactor 28 is communicated and the frequency converter 26 is started, the second condensate pump 22 operates in a frequency conversion mode; when the unit normally operates, one condensate pump operates in a frequency conversion mode, and the other condensate pump is standby in power frequency.
Note that, the opening and closing operations (i.e., the connection and disconnection operations) of the first circuit breaker 23, the second circuit breaker 24, the third circuit breaker 25, the first contactor 27, and the second contactor 28, and the start and stop operations of the inverter 26 are controlled by an electronic device, which may be a Distributed Control System (DCS).
Specifically, the method comprises the following steps:
step 101: and under the condition that the first condensate pump operates in a frequency conversion mode and the frequency converter meets a first preset condition, controlling the second condensate pump to operate in a power frequency mode.
For a condensate system used in a thermal power plant, the condensate system comprises two condensate pumps with the capacity of 100 percent. When the unit normally operates, one condensate pump operates in a frequency conversion mode, and the other condensate pump is standby at power frequency. According to the regulation of the 'equipment periodic test and rotation management standard' of the thermal power plant, two condensate pumps need to be switched periodically.
In the step, the first condensate pump is in a frequency conversion operation state, the second condensate pump is in a power frequency standby state, namely the third circuit breaker and the first contactor are in a communicated state, the first circuit breaker is in a disconnected state, and when the frequency converter is started, a motor of the first condensate pump operates in a frequency conversion mode; the second circuit breaker is in a connected state, the second contactor is in a disconnected state, and the second condensate pump is in a power frequency standby state.
In addition, specifically, in this embodiment, the switching time interval between the first condensate pump and the second condensate pump is preset, and the automatic timing module counts down the switching time interval, and after the count-down is completed, an alarm prompt of "whether to switch the first condensate pump to the second condensate pump" is triggered. If the user clicks 'reset' according to the alarm prompt, resetting the alarm and not executing switching; and if the confirmation is clicked, switching between the first condensate pump and the second condensate pump is executed.
When the frequency conversion operation of the first condensate pump is required to be switched, the frequency converter is required to be judged first, and under the condition that the frequency converter meets a first preset condition, the power frequency operation of the second condensate pump is controlled. And if the frequency converter does not meet the first preset condition, giving an alarm to prompt that the condensate pump fails to be switched, and finishing the automatic switching. The first preset condition may be that the frequency of the frequency converter is at a set value or whether the frequency converter operates normally.
Step 102: and under the condition that the power frequency of the second condensate pump runs normally, controlling the first condensate pump to stop frequency conversion running and controlling the first condensate pump to run at the power frequency.
Specifically, after the second condensate pump is switched from the power frequency standby state to the power frequency operation state, whether the second condensate pump operates normally in power frequency needs to be determined, and if the second condensate pump operates normally in power frequency, the first condensate pump is controlled to stop the frequency conversion operation, and the first condensate pump is controlled to operate in power frequency.
Specifically, the frequency converter can be controlled to stop running and the first contactor is controlled to be disconnected when the first condensate pump is controlled to stop running at variable frequency; when the first condensate pump is controlled to operate at power frequency, the first breaker can be controlled to be communicated.
It should be noted that if the second condensate pump operates abnormally, an alarm is given to prompt that the condensate pump fails to switch, and the automatic switching is finished.
Step 103: and under the condition that the power frequency operation of the first condensate pump is normal, controlling the second condensate pump to stop the power frequency operation.
Specifically, after the first condensate pump is switched to the power frequency operation state, whether the power frequency operation state is normal needs to be determined, and under the condition that the power frequency operation of the first condensate pump is normal, the second condensate pump in the power frequency operation state is controlled to stop the power frequency operation.
Specifically, the second condensate pump is controlled to stop operating at the power frequency, and the second circuit breaker can be controlled to be disconnected.
Of course, if the first condensate pump operates abnormally in power frequency, an alarm is given to prompt 'the condensate pump fails to switch', and the automatic switching is finished.
Step 104: and under the condition that the second condensate pump meets a second preset condition, controlling the second condensate pump to operate in a frequency conversion mode, and controlling the first condensate pump to stop operating at power frequency.
Specifically, the second condensate pump can be switched to the variable-frequency operation state after the second condensate pump stops power frequency operation.
And under the condition that the second condensate pump meets a second preset condition, the second condensate pump can be controlled to operate in a frequency conversion mode, and the first condensate pump is controlled to stop operating at power frequency.
Specifically, the second condensate pump is controlled to operate in a variable frequency mode, the first condensate pump is controlled to stop operating in a power frequency mode, the third circuit breaker and the second contactor can be controlled to be in a communicated state, and the frequency converter is started to control the second condensate pump to operate in a variable frequency mode; and the first breaker is controlled to be disconnected so as to control the first condensate pump to stop power frequency operation.
And of course, if the second condensate pump does not meet the second preset condition, an alarm is given to prompt 'the condensate pump fails to switch', and the automatic switching is finished.
According to the switching control method of the condensate pump provided by the embodiment of the invention, under the condition that the first condensate pump operates in a frequency conversion manner and the frequency converter meets the first preset condition, the second condensate pump is controlled to operate in a power frequency manner; under the condition that the power frequency operation of the second condensate pump is normal, controlling the first condensate pump to stop the variable frequency operation, and controlling the first condensate pump to operate at the power frequency; under the condition that the first condensate pump operates normally at power frequency, controlling a second condensate pump to stop operating at power frequency; under the condition that second condensate pump satisfies the second and predetermine the condition, control second condensate pump frequency conversion operation to control first condensate pump and stop the power frequency operation, this has realized the power frequency between first condensate pump and the second condensate pump, the automatic control of frequency conversion operation, thereby realize the accurate switching to first condensate pump and second condensate pump, the switching success rate of condensate pump has been improved, the problem of the easy switching failure that two condensate pumps of manual switching lead to among the correlation technique has been solved.
In one implementation, the controlling the second condensate pump to operate at power frequency under the condition that the first condensate pump operates at variable frequency and the frequency converter meets a first preset condition includes: and under the condition that the first condensate pump operates in a frequency conversion mode and the frequency of the frequency converter is greater than a first frequency threshold value, controlling the second condensate pump to operate in a power frequency mode.
That is, the first preset condition may be that the frequency of the frequency converter is greater than the first frequency threshold.
For example, the first predetermined frequency may be 47Hz, and the following embodiments are all described with the first predetermined frequency being 47 Hz.
Specifically, as shown in fig. 3, condensate system in this application can include oxygen-eliminating device, first condensate pump entry electric door, second condensate pump entry electric door, first condensate pump, second condensate pump, first condensate pump export check valve, second condensate pump export check valve, first condensate pump export electric door, the female pipe of condensate, oxygen-eliminating device water feeding governing valve and steam discharging device. Specifically, in the process of controlling the power frequency operation of the second condensate pump, the frequency control mode of the frequency converter can be switched from the automatic mode to the manual mode, the current automatic set value of the frequency converter is recorded, and the frequency of the frequency converter is increased to 48Hz at the rate of 2.5 Hz/S; and then judging whether the frequency control mode of the frequency converter is a manual mode or not and the current frequency is higher than 47Hz, if the frequency control mode of the frequency converter is determined to be switched to the manual mode and the current frequency is higher than 47Hz, closing the outlet electric door of the second condensate pump, starting the second condensate pump to operate at power frequency, and interlocking and fully opening the outlet electric door of the second condensate pump after the second condensate pump operates at power frequency.
In one implementation, the normal power frequency operation of the second condensate pump includes normal full-open feedback of an electric door at an outlet of the second condensate pump and normal power frequency operation feedback of the second condensate pump; under the normal condition of second condensate pump power frequency operation, control first condensate pump stops the frequency conversion operation, and controls first condensate pump power frequency operation includes:
under the condition that the power frequency operation of the second condensate pump is normal, if the pressure of a condensate header is not lower than a first pressure threshold, the power frequency current of the second condensate pump is larger than a first current threshold, and the frequency of the frequency converter is lower than a second frequency threshold, controlling to stop operating the frequency converter, and disconnecting the first contactor to control the first condensate pump to stop the frequency conversion operation; and controlling the first condensate pump to operate at power frequency.
For example, the first pressure threshold may be 3MPa, the first current threshold may be 100A, and the second frequency threshold may be 2.5MPa, which is an example value for the following examples.
Specifically, firstly, whether the power frequency operation of the second condensate pump is normal needs to be determined, and the judgment process of whether the power frequency operation of the second condensate pump is normal can be as follows: and judging whether the second condensate pump outlet electric door is normally fed back after being fully opened and whether the second condensate pump power frequency operation is normally fed back after being fully opened.
After determining that the power frequency operation of the second condensate pump is normal, and the pressure of the condensate bus is not lower than 3MPa, and the power frequency current of the second condensate pump is greater than 100A, controlling the first condensate pump to stop the frequency conversion operation, wherein the process can be as follows: firstly, rapidly reducing the frequency of the frequency converter from 48Hz to 25Hz at the rate of 5Hz/S, and then judging whether the frequency of the frequency converter is lower than 26Hz and the pressure of the condensate header is not lower than 2.5 MPa. And if the frequency of the frequency converter is lower than 26Hz and the pressure of the condensate water bus is not lower than 2.5MPa, closing the electric door at the outlet of the first condensate water pump, and then interlocking to stop operating the frequency converter.
Then, whether the feedback of the stop operation of the frequency converter is normal or not can be judged, and if the stop operation of the frequency converter is normal, the first contactor is disconnected so that the frequency conversion operation of the first condensate pump is stopped.
And then, whether the brake-off feedback of the first contactor is normal or not can be judged, and if the brake-off feedback of the first contactor is normal, the first condensate pump is proved to stop the variable-frequency operation.
And finally, the power frequency operation of the first condensate pump can be controlled to be completely opened by interlocking the electric door at the outlet of the first condensate pump.
In one implementation, the normal power frequency operation of the first condensate pump includes normal full-open feedback of an electric door at an outlet of the first condensate pump and normal power frequency operation feedback of the first condensate pump; under the normal condition of first condensate pump power frequency operation, control the second condensate pump stops power frequency operation, include:
and under the condition that the power frequency operation of the first condensate pump is normal, if the pressure of the condensate header is higher than a second pressure threshold value and the power frequency current of the first condensate pump is larger than a second current threshold value, controlling the second condensate pump to stop the power frequency operation.
For example, the second pressure threshold may be 3.7MPa, and the second current threshold may be 100A, and the following examples are all described with this example value.
Specifically, the process of judging whether the power frequency operation of the first condensate pump is normal or not can be as follows: and judging whether the full-open feedback of the electric door at the outlet of the first condensate pump is normal or not and whether the power frequency operation feedback of the first condensate pump is normal or not.
If the outlet electric door of the first condensate pump is normally opened and fed back, and the power frequency operation of the first condensate pump is normally fed back, the power frequency operation of the first condensate pump is normal, and at the moment, if the pressure of the condensate bus is higher than 3.7MPa and the power frequency current of the first condensate pump is higher than 100A, the outlet electric door of the second condensate pump is closed, and the power frequency operation of the second condensate pump is stopped in an interlocking manner.
In one implementation, the second preset condition includes that the second condensate pump outlet electric door is normally fully closed and fed back, the second condensate pump power frequency shutdown and fed back are normal, and the second condensate pump power frequency current is smaller than a third current threshold.
For example, the third current threshold may be 5A, and the following embodiments are all described with the third current threshold being 5A.
In one implementation, the controlling the second condensate pump to operate at a variable frequency and the controlling the first condensate pump to stop operating at a power frequency under the condition that the second condensate pump meets a second preset condition includes: under the condition that the second condensate pump meets a second preset condition, controlling the second contactor to be sucked, and controlling the frequency of the frequency converter to be higher than a third frequency threshold value so as to control the second condensate pump to operate in a frequency conversion mode; and if the pressure of the condensate header is higher than a third pressure threshold value and the current of the frequency converter is higher than a fourth current threshold value, controlling the first condensate pump to stop operating at power frequency.
For example, the third frequency threshold may be 48Hz, the third pressure threshold may be 3.7MPa, and the fourth current threshold may be 100A, which are used in the following embodiments.
Specifically, the process of determining whether the second condensate pump satisfies the second preset condition may be: and judging whether the feedback of the outlet electric door of the second condensate pump is normal or not, whether the power frequency stop feedback of the second condensate pump is normal or not and whether the power frequency current of the second condensate pump is less than 5A or not.
And under the condition that the second condensate pump meets a second preset condition, determining that the second condensate pump stops working frequency operation, and controlling the second condensate pump to run in a frequency conversion mode at the moment.
Specifically, the process of controlling the variable-frequency operation of the second condensate pump may be: closing the second contactor; judging whether the closing feedback of the second contactor is normal or not; and if the closing feedback of the second contactor is normal, starting the frequency converter to operate, and increasing the frequency of the frequency converter to 48Hz at the speed of 2.5Hz/S so as to enable the second condensate pump to operate in a frequency conversion mode.
Then, can judge whether the frequency conversion operation of second condensate pump is normal, the process of judging the frequency conversion running state of second condensate pump is: and judging whether the operation feedback of the frequency converter is normal or not, whether the frequency of the frequency converter is higher than 47Hz or not, whether the pressure of the condensate water main pipe is higher than 3.7MPa or not and whether the current of the frequency converter is higher than 100A or not.
If the frequency converter is normal in operation feedback, the frequency of the frequency converter is higher than 47Hz, the pressure of the condensate water bus is higher than 3.7MPa, and the current of the frequency converter is higher than 100A, the frequency conversion operation of the second condensate pump is proved to be normal, the electric door at the outlet of the first condensate pump is closed, then the first condensate pump is interlocked to stop the power frequency operation, namely the first condensate pump is controlled to stop the power frequency operation.
In one implementation, after the controlling the second condensate pump to operate at a variable frequency and the controlling the first condensate pump to stop operating at a power frequency, the method further includes: and controlling to open the electric door at the outlet of the first condensate pump so as to control the power frequency of the first condensate pump for later use.
Specifically, whether the power frequency outage feedback of the first condensate pump is normal or not can be judged firstly, and if the feedback is normal, the power frequency of the first condensate pump is controlled for standby.
The process of controlling the first condensate pump to power frequency standby may be: and switching the frequency control mode of the frequency converter into an automatic mode, and setting the set value as the set value before switching. And then opening the electric door at the outlet of the first condensate pump.
And judging whether the full-open feedback of the electric door at the outlet of the first condensate pump is normal or not, if so, proving that the first condensate pump is in a power frequency standby state, and finishing the switching of the first condensate pump and the second condensate pump. Thereafter, the next periodic handover may be performed.
Optionally, an embodiment of the present application is described below with reference to fig. 4 a. The method comprises the following steps:
the frequency conversion operation of the first condensate pump is switched into the frequency conversion operation example of the second condensate pump:
step 401: the periodic switching time interval is set and the automatic timing module starts to count down.
Step 402: and after the time of the automatic timing module reaches 0, triggering an alarm prompt of whether the first condensate pump is switched to the second condensate pump or not, clicking reset, entering a step 403, clicking confirm, and entering a step 404.
Step 403: and resetting the alarm and not executing switching.
Step 404: and executing switching, controlling to switch the frequency control mode of the frequency converter from an automatic mode to a manual mode, recording the current automatic set value of the frequency converter, and increasing the frequency of the frequency converter to 48Hz at the rate of 2.5 Hz/S.
Step 405: and judging that the frequency of the frequency converter is controlled to be in a manual mode and the frequency is higher than 47Hz, if so, entering a step 406, otherwise, giving an alarm, namely frequency conversion switching failure of the condensate pump, and finishing automatic switching.
Step 406: and closing the outlet electric door of the second condensate pump, starting the second condensate pump to operate at power frequency, and interlocking and fully opening the outlet electric door of the second condensate pump after the second condensate pump operates at power frequency.
Step 407: and judging whether the fully-open feedback of the electric door at the outlet of the second condensate pump is normal, the power frequency operation feedback of the second condensate pump is normal, the pressure of the condensate bus is not lower than 3MPa, and the power frequency current of the second condensate pump is greater than 100A, if so, entering step 408, otherwise, giving an alarm that the frequency conversion switching of the condensate pump fails, and finishing the automatic switching.
Step 408: the control rapidly reduces the frequency converter frequency to 25Hz at a rate of 5 Hz/S.
Step 409: and (3) judging that the frequency of the frequency converter is lower than 26Hz and the pressure of the condensate water main pipe is not lower than 2.5MPa, if so, entering a step 410, otherwise, giving an alarm that the frequency conversion switching of the condensate water pump fails, and ending the automatic switching.
Step 410: and controlling to close the electric door at the outlet of the first condensate pump, and interlocking and stopping the operation of the frequency converter after closing.
Step 411: and judging that the frequency converter stops running and the feedback is normal, if so, entering a step 412, otherwise, giving an alarm that the frequency conversion switching of the condensate pump fails, and ending the automatic switching.
Step 412: the first contactor is opened.
In addition, referring to fig. 4b, the following steps are also included in this embodiment:
step 413: and judging that the brake-separating feedback of the first contactor is normal, if so, advancing to step 414, otherwise, giving an alarm of 'frequency conversion switching failure of the condensate pump', and ending automatic switching.
Step 414: and starting the first condensate pump to operate at power frequency, and interlocking and fully opening the electric door at the outlet of the first condensate pump.
Step 415: and judging whether the electric door at the outlet of the first condensate pump is normally fully opened and fed back, the power frequency operation feedback of the first condensate pump is normal, the pressure of the condensate header is higher than 3.7MPa, and the power frequency current of the first condensate pump is higher than 100A, if so, entering a step 416, otherwise, giving an alarm that the frequency conversion switching of the condensate pump fails, and finishing the automatic switching.
Step 416: and closing the electric door at the outlet of the second condensate pump, and interlocking to stop the power frequency operation of the second condensate pump.
Step 417: and judging that the second condensate pump outlet electric door is normally fed back when being fully closed, the second condensate pump power frequency stops being fed back normally, and the second condensate pump power frequency current is less than 5A, if so, entering a step 418, otherwise, giving an alarm, namely 'the frequency conversion switching failure of the condensate pump', and finishing the automatic switching.
Step 418: and closing the second contactor.
Step 419: and judging that the second contactor closing feedback is normal, if so, entering a step 420, otherwise, giving an alarm that the frequency conversion switching of the condensate pump fails, and ending the automatic switching.
Step 420: and starting the frequency converter to run, and increasing the frequency of the frequency converter to 48Hz at the rate of 2.5Hz/S after the frequency converter is started.
Step 421: and judging that the frequency converter operates normally and feeds back, the frequency of the frequency converter is higher than 47Hz, the pressure of the condensate water main pipe is higher than 3.7MPa, and the current of the frequency converter is higher than 100A, if so, entering a step 422, otherwise, giving an alarm, namely 'the frequency conversion switching failure of the condensate water pump', and finishing the automatic switching.
Step 422: and closing the electric door at the outlet of the first condensate pump, and then interlocking to stop the power frequency operation of the first condensate pump.
Step 423: and judging that the power frequency shutdown feedback of the first condensate pump is normal, if so, entering a step 424, otherwise, giving an alarm of 'frequency conversion switching failure of the condensate pump', and ending automatic switching.
Step 424: and (4) switching the frequency control mode of the frequency converter into an automatic mode, and setting the set value as the set value before switching.
Step 425: and opening the electric door at the outlet of the first condensate pump.
Step 426: and (4) judging that the full-open feedback of the electric door at the outlet of the first condensate pump is normal, if so, entering the step 127, otherwise, giving an alarm that the frequency conversion switching of the condensate pump fails, and ending the automatic switching.
Step 427: and (5) putting the first condensate pump for standby power frequency, and finishing the switching. The timer restarts counting down to wait for the next periodic switching.
Like this, through the above-mentioned switching process, switch first condensate pump and second condensate pump, it is undulant big to have overcome the condensate flow that two condensate pumps regularly switch and lead to among the manual realization unit condensate system, the deaerator liquid level is undulant big, the operating load is big, switch failure rate height and the problem that uncontrollable factor is high, managers and operation operating personnel's intensity of labour has greatly reduced, the success rate of switching has been improved, the problem that manual switching in-process condensate flow and deaerator liquid level are undulant big has been avoided.
It should be noted that, in the method for controlling switching of a condensate pump provided in the embodiment of the present application, the execution main body may be a switching control device of the condensate pump or a control module in the switching control device of the condensate pump, which is used for executing the method for controlling switching of the condensate pump. In the embodiment of the present application, a method for executing a switching control of a condensate pump by a switching control device of a condensate pump is taken as an example, and the switching control device of a condensate pump provided in the embodiment of the present application is described.
Fig. 5 is a schematic configuration diagram of a switching control device of a condensate pump according to an embodiment of the present invention. As shown in fig. 5, the switching control device 500 of the condensate pump includes: a first control module 510, a second control module 520, a third control module 530, and a fourth control module 540.
The first control module 510 is configured to control the second condensate pump to operate at power frequency under the condition that the first condensate pump operates at variable frequency and the frequency converter meets a first preset condition; the second control module 520 is configured to control the first condensate pump to stop the frequency conversion operation and control the first condensate pump to operate at the power frequency under the condition that the second condensate pump operates at the normal power frequency; the third control module 530 is configured to control the second condensate pump to stop operating at the power frequency under the condition that the first condensate pump operates at the power frequency normally; and the fourth control module 540 is configured to control the second condensate pump to operate in a frequency conversion manner and control the first condensate pump to stop operating at power frequency when the second condensate pump meets a second preset condition.
In one implementation, the first control module 510 is further configured to: and under the condition that the first condensate pump operates in a frequency conversion mode and the frequency of the frequency converter is greater than a first frequency threshold value, controlling the second condensate pump to operate in a power frequency mode.
In one implementation, the second control module 520 is further configured to: under the condition that the power frequency operation of the second condensate pump is normal, if the pressure of a condensate header is not lower than a first pressure threshold, the power frequency current of the second condensate pump is larger than a first current threshold, and the frequency of the frequency converter is lower than a second frequency threshold, controlling to stop operating the frequency converter, and disconnecting the first contactor to control the first condensate pump to stop the frequency conversion operation; and controlling the first condensate pump to operate at power frequency.
In one implementation, the third control module 530 is further configured to: and under the condition that the power frequency operation of the first condensate pump is normal, if the pressure of the condensate header is higher than a second pressure threshold value and the power frequency current of the first condensate pump is larger than a second current threshold value, controlling the second condensate pump to stop the power frequency operation.
In one implementation, the second preset condition includes that the second condensate pump outlet electric door is normally fully closed and fed back, the second condensate pump power frequency shutdown and fed back are normal, and the second condensate pump power frequency current is smaller than a third current threshold.
In one implementation, the fourth control module 540 is further configured to: under the condition that the second condensate pump meets a second preset condition, controlling the second contactor to be sucked, and controlling the frequency of the frequency converter to be higher than a third frequency threshold value so as to control the second condensate pump to operate in a frequency conversion mode; and if the pressure of the condensate header is higher than a third pressure threshold value and the current of the frequency converter is higher than a fourth current threshold value, controlling the first condensate pump to stop operating at power frequency.
In one implementation, the fourth control module 540 is further configured to: and after the second condensate pump is controlled to operate in a frequency conversion mode and the first condensate pump is controlled to stop operating at the power frequency, the electric door at the outlet of the first condensate pump is controlled to be opened so as to control the power frequency of the first condensate pump for standby.
The switching control device of the condensate pump in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device can be mobile electronic equipment or non-mobile electronic equipment. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine or a self-service machine, and the like, and the embodiments of the present application are not particularly limited.
The switching control device of the condensate pump in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.
The switching control device for the condensate pump provided in the embodiment of the present application can implement each process implemented in the method embodiments of fig. 1 to 4b, and is not described herein again to avoid repetition.
Optionally, as shown in fig. 6, an electronic device 600 is further provided in this embodiment of the present application, and includes a processor 601, a memory 602, and a program or an instruction stored in the memory 602 and executable on the processor 601, where the program or the instruction is executed by the processor 601 to implement each process of the above-mentioned embodiment of the condensate pump switching control method, and can achieve the same technical effect, and in order to avoid repetition, it is not described here again.
It should be noted that the electronic device in the embodiment of the present application includes the mobile electronic device and the non-mobile electronic device described above.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above-mentioned embodiment of the method for controlling switching of a condensate pump, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the embodiment of the switching control method for a condensate pump, and can achieve the same technical effect, and in order to avoid repetition, the description is omitted here.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A switching control method of a condensate pump is applied to a switching control device of the condensate pump, the switching control device comprises a first condensate pump, a second condensate pump, a frequency converter, a first contactor and a second contactor, a bus is connected with the first condensate pump through a first circuit breaker, is connected with the second condensate pump through a second circuit breaker, is connected with the first condensate pump through a third circuit breaker, the frequency converter and the first contactor, and is connected with the second condensate pump through the third circuit breaker, the frequency converter and the second contactor, and the switching control method is characterized by comprising the following steps:
controlling the second condensate pump to operate at power frequency under the condition that the first condensate pump operates at variable frequency and the frequency converter meets a first preset condition;
under the condition that the power frequency operation of the second condensate pump is normal, controlling the first condensate pump to stop the variable frequency operation, and controlling the first condensate pump to operate at the power frequency;
under the condition that the first condensate pump operates normally at power frequency, controlling the second condensate pump to stop operating at power frequency;
and under the condition that the second condensate pump meets a second preset condition, controlling the second condensate pump to operate in a frequency conversion mode, and controlling the first condensate pump to stop operating at power frequency.
2. The method for controlling switching of condensate pumps according to claim 1, wherein the controlling of the second condensate pump to operate at power frequency under the condition that the first condensate pump operates at variable frequency and the frequency converter meets a first preset condition comprises:
and under the condition that the first condensate pump operates in a frequency conversion mode and the frequency of the frequency converter is greater than a first frequency threshold value, controlling the second condensate pump to operate in a power frequency mode.
3. The switching control method of the condensate pump according to claim 1, wherein the normal operation of the second condensate pump at power frequency comprises normal full-open feedback of an outlet electric door of the second condensate pump and normal feedback of the operation of the second condensate pump at power frequency;
under the normal condition of second condensate pump power frequency operation, control first condensate pump stops the frequency conversion operation, and controls first condensate pump power frequency operation includes:
under the condition that the power frequency operation of the second condensate pump is normal, if the pressure of a condensate header is not lower than a first pressure threshold, the power frequency current of the second condensate pump is larger than a first current threshold, and the frequency of the frequency converter is lower than a second frequency threshold, controlling to stop operating the frequency converter, and disconnecting the first contactor to control the first condensate pump to stop the frequency conversion operation;
and controlling the first condensate pump to operate at power frequency.
4. The switching control method of a condensate pump according to claim 1, wherein the normal operation of the first condensate pump at power frequency comprises normal feedback of full opening of an outlet electric door of the first condensate pump and normal feedback of power frequency operation of the first condensate pump;
under the normal condition of first condensate pump power frequency operation, control the second condensate pump stops power frequency operation, include:
and under the condition that the power frequency operation of the first condensate pump is normal, if the pressure of the condensate header is higher than a second pressure threshold value and the power frequency current of the first condensate pump is larger than a second current threshold value, controlling the second condensate pump to stop the power frequency operation.
5. The method according to claim 1, wherein the second predetermined condition includes that the second condensate pump outlet electric gate is fully closed and fed back normally, the second condensate pump power frequency shutdown and fed back normally, and the second condensate pump power frequency current is smaller than a third current threshold.
6. The method for controlling switching of the condensate pumps according to claim 1 or 5, wherein the controlling the second condensate pump to operate at a variable frequency and the controlling the first condensate pump to stop operating at a power frequency under the condition that the second condensate pump meets a second preset condition comprises:
under the condition that the second condensate pump meets a second preset condition, controlling the second contactor to be sucked, and controlling the frequency of the frequency converter to be higher than a third frequency threshold value so as to control the second condensate pump to operate in a frequency conversion mode;
and if the pressure of the condensate header is higher than a third pressure threshold value and the current of the frequency converter is higher than a fourth current threshold value, controlling the first condensate pump to stop operating at power frequency.
7. The method for controlling switching of condensate pumps according to claim 1, further comprising, after the controlling the second condensate pump to operate at a variable frequency and the controlling the first condensate pump to stop operating at a commercial frequency:
and controlling to open the electric door at the outlet of the first condensate pump so as to control the power frequency of the first condensate pump for later use.
8. The utility model provides a condensate pump's switching control device, includes first condensate pump, second condensate pump, converter, first contactor and second contactor, the generating line pass through first circuit breaker with first condensate pump is connected, through the second circuit breaker with second condensate pump is connected, through third circuit breaker, converter, first contactor with first condensate pump is connected, and passes through third circuit breaker, converter, second contactor with second condensate pump is connected, its characterized in that, switching control device still includes:
the first control module is used for controlling the second condensate pump to operate at power frequency under the condition that the first condensate pump operates at variable frequency and the frequency converter meets a first preset condition;
the second control module is used for controlling the first condensate pump to stop frequency conversion operation and controlling the first condensate pump to operate at power frequency under the condition that the second condensate pump operates at normal power frequency;
the third control module is used for controlling the second condensate pump to stop operating at the power frequency under the condition that the first condensate pump operates at the power frequency normally;
and the fourth control module is used for controlling the second condensate pump to operate in a frequency conversion mode and controlling the first condensate pump to stop operating in a power frequency mode under the condition that the second condensate pump meets a second preset condition.
9. An electronic device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the method of switching control of a condensate pump as claimed in any one of claims 1 to 7.
10. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, carry out the steps of the method of switching control of a condensate pump according to any one of claims 1 to 7.
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| CN202210013897.6A CN114233615A (en) | 2022-01-06 | 2022-01-06 | Condensate pump switching control method and device, electronic equipment and storage medium |
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| CN202210013897.6A CN114233615A (en) | 2022-01-06 | 2022-01-06 | Condensate pump switching control method and device, electronic equipment and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116667383A (en) * | 2023-05-30 | 2023-08-29 | 中国电力工程顾问集团有限公司 | Heat pump and low-adding coupling thermal power generating unit frequency modulation system and method |
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