CN209765347U - box-type substation dehumidification control circuit and dehumidification system - Google Patents
box-type substation dehumidification control circuit and dehumidification system Download PDFInfo
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- CN209765347U CN209765347U CN201920436476.8U CN201920436476U CN209765347U CN 209765347 U CN209765347 U CN 209765347U CN 201920436476 U CN201920436476 U CN 201920436476U CN 209765347 U CN209765347 U CN 209765347U
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Abstract
the application relates to a dehumidification control circuit and a dehumidification system for a box-type substation, which comprise a control module connected with dehumidification equipment of the box-type substation, and a water immersion detection module and a temperature and humidity detection module which are arranged in the box-type substation; the control module is respectively connected with the water immersion detection module and the temperature and humidity detection module; the water immersion detection module comprises a signal acquisition circuit and a signal comparison circuit which is respectively connected with the signal acquisition circuit and the control module; the signal acquisition circuit transmits the acquired water immersion signal to the signal comparison circuit; the signal comparison circuit transmits a water accumulation signal to the control module when the water immersion signal is greater than or equal to the water immersion threshold value; the temperature and humidity detection module transmits the detected humidity signal to the control module; and the control module controls the working state of the box-type substation dehumidification equipment according to the accumulated water signal and the humidity signal. The method and the device can improve the accuracy of water logging signal detection, accurately judge the water accumulation condition in the box-type substation, and improve the reliability of the dehumidification control circuit of the box-type substation.
Description
Technical Field
The application relates to the technical field of dehumidification of transformer substations, in particular to a dehumidification control circuit and a dehumidification system for a box-type transformer substation.
background
the box-type substation, namely a pre-installed substation or a pre-installed substation, is factory prefabricated indoor and outdoor compact distribution equipment which is arranged into a whole according to a certain wiring scheme, and can realize power distribution by combining the functions of voltage reduction, low-voltage distribution and the like of a transformer and installing the transformer on a movable steel structure box.
because the box-type transformer substation is often installed outdoors, the box-type transformer substation is easily influenced by environmental factors. When the humidity in a rainy season or the surrounding environment is high, moisture permeates into the box-type substation, and causes the electrical equipment to break down, even causes safety accidents. In order to avoid the box-type substation being in a wet state, dehumidification of the box-type substation is required. However, in the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the existing traditional box-type substation dehumidification control circuit has the problems of poor reliability and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a highly reliable dehumidification control circuit and a highly reliable dehumidification system for a box-type substation.
in order to achieve the above object, in one aspect, an embodiment of the present application provides a box-type substation dehumidification control circuit, including a control module connected to a box-type substation dehumidification device; the system also comprises a water immersion detection module and a temperature and humidity detection module which are arranged in the box-type substation; the control module is respectively connected with the water immersion detection module and the temperature and humidity detection module;
The water immersion detection module comprises a signal acquisition circuit and a signal comparison circuit which is respectively connected with the signal acquisition circuit and the control module; the signal acquisition circuit comprises a first water sensor, a second water sensor, a power supply, a first resistor and a second resistor;
One end of the first water sensor is connected with one end of the first resistor and the power supply respectively, and the other end of the first water sensor is connected with one end of the second resistor; one end of the second water sensor is connected with the other end of the first resistor and the signal comparison circuit respectively, and the other end of the second water sensor is connected with the other end of the second resistor and the power supply respectively.
In one embodiment, the box substation comprises a first side and a second side; the first side is opposite to the second side;
The first water sensor is arranged on the first side; the second water sensor is arranged on the second side.
in one embodiment, the signal comparison circuit comprises a comparator for connecting a reference power supply;
and a first signal input end of the comparator is connected with one end of the second water sensor, a second signal input end of the comparator is used for being connected with a reference power supply, and a signal output end of the comparator is connected with the control module.
In one embodiment, the temperature and humidity detection module comprises a master station communication unit connected with the control module and at least one temperature and humidity signal acquisition unit; the temperature and humidity signal acquisition unit is connected with the master station communication unit.
In one embodiment, the temperature and humidity signal acquisition unit comprises a temperature and humidity sensor, a first communication chip connected with the temperature and humidity sensor, and a first antenna connected with the first communication chip;
The master station communication unit comprises a second communication chip and a second antenna connected with the second communication chip.
In one embodiment, the number of the temperature and humidity signal acquisition units is 2;
Any temperature and humidity signal acquisition unit is arranged in a transformer room of the box-type substation, and the other temperature and humidity signal acquisition unit is arranged in a low-voltage distribution room of the box-type substation.
In one embodiment, the control module comprises a controller, and at least one isolated drive circuit; the isolation driving circuit is used for connecting an external power supply;
The controller is respectively connected with the signal comparison circuit, the temperature and humidity detection module and the isolation driving circuit.
In one embodiment, the isolation driving circuit comprises an optical coupler and a relay for connecting the box-type substation dehumidification equipment;
The optical coupler is respectively connected with the relay, the controller and the external power supply.
On the other hand, the embodiment of the application further provides a box-type substation dehumidification system, which comprises box-type substation dehumidification equipment and the box-type substation dehumidification control circuit which is connected with the box-type substation dehumidification equipment and is provided with any one of the embodiments.
In one embodiment, the device further comprises a condensation pipe; the box-type substation dehumidification equipment comprises an air blower and an exhaust fan;
The box-type substation comprises a first side and a second side; the first side is opposite to the second side; the condensation pipe is communicated with the first side and is connected with the blower; the exhaust fan is arranged on the second side;
When the blower is started, air enters the box-type substation through the condenser pipe and is exhausted from the exhaust fan.
in one embodiment, the system further comprises heating equipment and a water tank arranged outside the box-type substation; the box-type substation dehumidification equipment also comprises a drainage pump arranged in the box-type substation; the first side is provided with a first drainage hole;
The draining pump drains accumulated water of the box-type substation to the water tank through the first draining hole; the condensation pipe is connected with the air blower through heating equipment and is provided with a second drain hole corresponding to the water tank;
When the air blower is started, air enters the box-type substation through the heating equipment and the condenser pipe in sequence.
one of the above technical solutions has the following advantages and beneficial effects:
This application is through using signal acquisition circuit to gather the water logging signal to utilize signal comparison circuit to carry out comparison processing to the water logging signal, realize when the water logging signal is greater than or equal to the water logging threshold value, to control module transmission ponding signal, thereby improve the accuracy that the water logging signal detected, and can accurately judge the ponding condition in the box-type substation, and then reduce the emergence of the wrong report condition, avoid box-type substation dehumidification equipment idle running or maloperation, and then improve box-type substation dehumidification control circuit's reliability.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic block diagram of a box substation dehumidification control circuit in one embodiment;
FIG. 2 is a block diagram of the signal comparison circuit steps in one embodiment;
Fig. 3 is a block diagram of a temperature and humidity signal acquisition unit in an embodiment;
FIG. 4 is a block diagram of an embodiment of an isolated driver circuit;
FIG. 5 is a circuit diagram of a box substation dehumidification control circuit in one embodiment;
FIG. 6 is a schematic diagram of a box substation dehumidification system in one embodiment;
FIG. 7 is a schematic flow chart of a box substation dehumidification control method in one embodiment;
FIG. 8 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
to facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "one end," "another end," "first side," "second side," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
in practical application, the box-type substation field is installed outdoors for use, when the humidity of the environment is high, moisture can permeate into the box-type substation through the cable trench due to the high humidity of the cable outlet, and safety accidents such as cable burning, voltage transformer short circuit and the like are easily caused at a cable joint, so that the safe operation of electrical equipment is not facilitated. In rainy season, rainwater easily permeates into the box-type substation along the buried cable and collects in the box-type substation to form accumulated water.
in order to solve the problems, device faults and fire accidents are avoided, the safety of the box-type substation is improved, and the box-type substation needs a dehumidification system to remove indoor integrals and reduce the humidity of indoor air. In order to automatically control the operation state of the dehumidification equipment in the dehumidification system, the dehumidification control circuit of the box-type substation is required to transmit a control signal to the dehumidification equipment in time so as to indicate the dehumidification equipment to switch the working state.
in order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, as shown in fig. 1, a box substation dehumidification control circuit is provided, comprising a control module 110 connected to a box substation dehumidification device; the system also comprises a water immersion detection module and a temperature and humidity detection module 120 which are arranged in the box-type substation; the control module 110 is respectively connected with the water immersion detection module and the temperature and humidity detection module 120;
The water immersion detection module comprises a signal acquisition circuit 130 and a signal comparison circuit 140 respectively connected with the signal acquisition circuit 130 and the control module 110; the signal acquisition circuit 130 comprises a first water sensor 132, a second water sensor 134, a power supply 136, a first resistor and a second resistor;
One end of the first water sensor 132 is connected to one end of the first resistor and the power supply 136, and the other end is connected to one end of the second resistor; one end of the second water sensor 134 is connected to the other end of the first resistor and the signal comparison circuit 140, and the other end is connected to the other end of the second resistor and the power supply 136.
The box-type substation dehumidification equipment can comprise drainage equipment and air humidity adjusting equipment, and specifically can comprise a dehumidifier, a moisture dispeller, an air conditioner, a drainage pump, an exhaust fan, a blower and/or humidity adjusting equipment and the like; the number of the box-type substation dehumidification equipment can be determined according to actual conditions and design requirements, and can be one or more. The first resistor and the second resistor may be standard resistors; the first water sensor and the second water sensor can be sensors with higher sensitivity; the power supply may be used to provide 5V (volts) of voltage.
specifically, the signal acquisition circuit is used for acquiring water immersion signals in the box-type transformer substation and transmitting the acquired water immersion signals to the signal comparison circuit. Wherein, this application detects when having water to exist with the electrode, converts the dry contact to through water sensor and carries out the output, and its resistance can increase along with the increase of water content. In a specific example, the input voltage of the signal comparison circuit can be calculated by connecting the first water sensor to the first resistor, the second resistor and the power supply respectively, and connecting the second water sensor to the signal comparison circuit, the first resistor, the second resistor and the power supply respectively, as shown in the following formula:
Wherein R1 is the resistance of the first water sensor; r2 is the resistance of the second water sensor; r3 is the resistance of the first resistor; r4 is the resistance of the second resistor; u is the voltage value of the power supply.
In the above way, the water sensor can meet the liquid conduction principle, and further obtain the input voltage of the signal comparison circuit; further, this application connects power supply's positive pole with the one end of first water sensor, and power supply's negative pole is connected to the other end of second water sensor for first water sensor and second water sensor constitute differential amplifier circuit, and connect power supply, when the water sensor resistance changes, the water logging signal also correspondingly changes, thereby the collection water logging signal that can be more accurate, improves the accuracy that the water logging signal detected.
in addition, the signal comparison circuit of this application is through comparing water logging signal and water logging threshold value to judge the ponding condition in the box-type substation. When the water immersion signal is larger than or equal to the water immersion threshold value, the dehumidifying equipment is determined to be required to be started to discharge accumulated water in the box-type substation, and the accumulated water signal is transmitted to the control module. The humiture detection module transmits the detected humidity signal to the control module, wherein the humidity signal is used for indicating the indoor air humidity of the transformer substation in the box. Furthermore, the temperature and humidity detection module can also be used for detecting the temperature signal of the box-type substation, and the detected signal can be transmitted to the control module in a wired transmission or wireless transmission mode.
The control module of this application is according to ponding signal and humidity signal, control box-type substation dehumidification equipment's operating condition. When the control module receives the accumulated water signal, the control module confirms that the drainage equipment needs to be started to drain accumulated water in the box-type substation, and then the control module transmits a first starting signal to the box-type substation dehumidification equipment to start the drainage equipment; when the humidity signal is received, the humidity signal is compared with the first humidity threshold value, when the humidity signal is larger than or equal to the first humidity threshold value, it is confirmed that the air humidity adjusting device needs to be started to reduce the indoor air humidity of the box-type substation, and then a second starting signal is transmitted to the box-type substation dehumidifying device to start the air humidity adjusting device.
Further, when the air humidity adjusting device is started, if the temperature signal is smaller than the second humidity threshold value, the air humidity adjusting device is closed. The first humidity threshold value and the second humidity threshold value can be unequal, and the second humidity threshold value can be smaller than the first humidity threshold value, so that equipment damage caused by repeated opening and closing of the box-type substation dehumidification equipment is avoided.
in addition, when the accumulated water in the box-type substation is drained to a certain degree, the drainage apparatus is turned off. The control module can select to close the drainage equipment when all accumulated water in the box-type substation is drained; or when accumulated water in part of the box-type substation is drained, the drainage equipment is closed.
specifically, the signal acquisition circuit in the application can transmit the acquired water immersion signal to the signal comparison circuit; the signal comparison circuit transmits a water accumulation signal to the control module when the water immersion signal is greater than or equal to the water immersion threshold value; the temperature and humidity detection module transmits the detected humidity signal to the control module; and the control module controls the working state of the box-type substation dehumidification equipment according to the accumulated water signal and the humidity signal.
it should be noted that the signal comparison circuit may be implemented by an existing circuit structure, and in a specific example, the signal comparison circuit includes a comparator for connecting to a reference power supply; and a first signal input end of the comparator is connected with one end of the second water sensor, a second signal input end of the comparator is used for being connected with a reference power supply, and a signal output end of the comparator is connected with the control module.
This application is through using signal acquisition circuit to gather the water logging signal to utilize signal comparison circuit to carry out comparison processing to the water logging signal, realize when the water logging signal is greater than or equal to the water logging threshold value, to control module transmission ponding signal, thereby improve the accuracy that the water logging signal detected, and can accurately judge the ponding condition in the box-type substation, and then reduce the emergence of the wrong report condition, avoid box-type substation dehumidification equipment idle running or maloperation, and then improve box-type substation dehumidification control circuit's reliability.
In one embodiment, the box substation comprises a first side and a second side; the first side is opposite to the second side;
The first water sensor is arranged on the first side; the second water sensor is arranged on the second side.
Specifically, a first water logging sensor and a second water logging sensor can be respectively installed at the head end and the tail end of the bottom of the box-type substation; furthermore, the second water sensor can be arranged on the first side, and the first water sensor can be arranged on the second side.
In one embodiment, the signal comparison circuit comprises a comparator for connecting a reference power supply;
And a first signal input end of the comparator is connected with one end of the second water sensor, a second signal input end of the comparator is used for being connected with a reference power supply, and a signal output end of the comparator is connected with the control module.
Wherein, the reference power supply can be used for providing 1V voltage; the comparator model may be LM 358D.
Specifically, the comparator obtains a first input signal from the first signal input terminal, obtains a second input signal from the second signal input terminal, compares the first input signal with the second input signal, and outputs the comparison result through the signal output terminal. The comparator compares the water immersion signal acquired by the signal acquisition circuit with a reference power supply to judge the water accumulation condition in the box-type substation, so that a water accumulation signal is obtained, and the water accumulation signal is transmitted to the control module through the signal output end.
Further, as shown in fig. 2, the signal comparison circuit may further include a resistor R5, a resistor R6, and a resistor R7; the comparator is also used for being respectively connected with a first comparator power supply and a second comparator power supply.
the first comparator power supply can be a 5V power supply, and the second comparator power supply can be a-5V power supply; the resistance R5 may be 10k Ω (kilo-ohms); the resistance of the resistor R6 can be 10k omega; the resistor R7 may have a resistance of 100k omega. The first comparator power supply and the second comparator power supply are both used for supplying power to the comparator. This application passes through resistance R5, connects signal acquisition circuit through the first signal input part with the comparator, passes through resistance R6, connects reference power with second signal input part, passes through resistance R7 with signal output part, connects first comparator power to box-type substation dehumidification control circuit's reliability can be improved.
In one embodiment, the temperature and humidity detection module comprises a master station communication unit connected with the control module and at least one temperature and humidity signal acquisition unit; the temperature and humidity signal acquisition unit is connected with the master station communication unit;
The master station communication unit transmits the humidity signals acquired by the temperature and humidity signal acquisition unit to the control module.
specifically, the humiture signal acquisition unit of this application can gather the humidity signal of box-type transformer substation to accessible wireless transmission, give main website communication unit with humidity signal transmission. The master station communication unit can be connected with the control module in a wired communication or wireless communication mode, and transmits the received humidity signal to the control module, so that the temperature and humidity acquisition unit and the controller can be prevented from being connected in a wired mode, the wiring layout of the box-type substation dehumidification control circuit is simplified, and the reliability of the box-type substation dehumidification control circuit is improved.
Preferably, the master station communication unit can transmit the humidity signal to the control module through a 485 communication protocol.
in one embodiment, as shown in fig. 3, the temperature and humidity signal collecting unit includes a temperature and humidity sensor 121, a first communication chip 123 connected to the temperature and humidity sensor 121, and a first antenna 125 connected to the first communication chip 123;
The master station communication unit comprises a second communication chip 127 and a second antenna 129 connected with the second communication chip 127;
the first communication chip 123 transmits the humidity signal collected by the temperature and humidity sensor 121 to the control module through the first antenna 125, the second antenna 129 and the second communication chip 127 in sequence.
The model of the first communication chip and the model of the second communication chip can be ESP 8266; the temperature and humidity sensor has higher sensitivity to humidity, and the type of the temperature and humidity sensor can be DHT 11.
specifically, the first communication chip and the second communication chip are main control chips of a WIFI (action hotspot) site, and can be used as interfaces for WIFI communication and controllers for controlling and reading temperature and humidity data of the temperature and humidity sensor.
In one embodiment, the number of the temperature and humidity signal acquisition units is 2;
Any temperature and humidity signal acquisition unit is arranged in a transformer room of the box-type substation, and the other temperature and humidity signal acquisition unit is arranged in a low-voltage distribution room of the box-type substation.
Specifically, two temperature and humidity signal acquisition units are uniformly and equidistantly arranged on the side part of the box-type substation. The box-type substation generally has no temperature and humidity control capability, and a humidity sensor is usually installed in a transformer room of a few box-type substations with temperature and humidity monitoring functions, but a corresponding humidity detection device is not provided in a bottom channel with the heaviest humidity. This application is through locating box-type substation's transformer room and low pressure distribution room respectively with temperature and humidity signal acquisition unit to can monitor the humidity in the box-type substation more comprehensively.
In one embodiment, the control module comprises a controller, and at least one isolated drive circuit; the isolation driving circuit is used for connecting an external power supply;
The controller is respectively connected with the signal comparison circuit, the temperature and humidity detection module and the isolation driving circuit.
wherein, the controller can be a singlechip; preferably, a PIC16F877A singlechip can be used.
specifically, when accumulated water exists at the bottom of the box-type substation, the controller receives an accumulated water signal transmitted by the signal comparison circuit, namely an interrupt signal, and enters into interrupt. When the controller enters an interrupt, the box-type substation dehumidification equipment is driven through the isolation driving circuit.
In addition, this application is through connecting the humiture detection module with the controller to can acquire box-type substation's humidity signal, and compare humidity signal and first humidity threshold value, when humidity signal is greater than or equal to first humidity threshold value, confirm that the indoor air humidity that needs open air humidity adjusting equipment and reduce box-type substation, and drive box-type substation dehumidification equipment through keeping apart drive circuit.
in one embodiment, the isolation driving circuit comprises an optical coupler and a relay for connecting the box-type substation dehumidification equipment;
the optical coupler is respectively connected with the relay, the controller and the external power supply.
The type of the optocoupler can be TLP 521; a first pin of the optocoupler is connected with the controller, a second pin of the optocoupler is grounded, a third pin of the optocoupler is used for connecting an external power supply, and a fourth pin of the optocoupler is connected with the relay.
Specifically, when the controller passes through isolation drive circuit drive box-type substation dehumidification equipment, the controller is through exporting the high level to the opto-coupler to the third pin and the fourth pin switch-on of drive opto-coupler make the coil connection external power source of relay and receive the electricity, and the normally open contact of relay is closed, and external power source supplies power for box-type substation dehumidification equipment, thereby starts box-type substation dehumidification equipment.
further, as shown in fig. 4, the isolation driving circuit may further include a resistor R8 and a resistor R9; the optical coupler is connected with the controller through a resistor R8 and is connected with an external power supply through a resistor R9.
to further illustrate the solution of the present application, a specific example is described below, and as shown in fig. 5, a box substation dehumidification control circuit is provided.
The box-type substation dehumidification equipment comprises a drainage pump, an exhaust fan and an air blower.
specifically, the master station communication unit transmits the humidity signal to the singlechip through a 485 bus; meanwhile, the water immersion signal is converted into an interrupt signal (namely a water accumulation signal which can be high level) through the signal acquisition circuit and the signal comparison circuit, and the draining pump is started and stopped through the RB2 of the single chip microcomputer, so that the energy is saved and the efficiency is high. The single chip microcomputer transmits a drainage pump control signal, an exhaust fan control signal and a blower control signal to corresponding optical couplers respectively according to the humidity signal and the interrupt signal, and controls corresponding solid relays through the corresponding optical couplers, so that the drainage pump, the exhaust fan and the blower are controlled respectively.
In the signal comparison circuit, the input voltage of the inverting input terminal of the comparator is:
Wherein R1 is the resistance of the first water sensor; r2 is the resistance of the second water sensor; r3 is the resistance of the first resistor; r4 is the resistance of the second resistor; u is the voltage value of the power supply.
UBDand compared with the non-inverting input terminal of the comparator, namely, the +1V voltage. When the bottom of the box-type transformer substation is immersed in water, UBDgreater than or equal to 1V, so that the comparator signal output terminal outputs 0V. RB1 port through connecting the signal output part of comparator with the singlechip, when comparator signal output part output 0V, the RB1 port of singlechip is the low level, make RB2 port output high level, and drive corresponding opto-coupler, the third pin and the fourth pin switch-on of this opto-coupler, make solid relay coil KM1 get electric, and then make the relay connect external power source, the output contact cluster of relay goes into electric main loop, the relay KM1 normally open contact closure of the main loop at drain pump place, external power source is the drain pumpAnd supplying power, thereby starting the drainage pump and starting drainage. When the bottom of the box-type transformer substation is not immersed in water, UBDAnd if the voltage is less than 1V, the signal output end of the comparator outputs 5V, the RB1 port of the single chip microcomputer is at a high level, the drainage pump is closed, and drainage is stopped.
The temperature and humidity sensors are distributed at different places of the box-type substation, and the humidity signals are transmitted to the single chip microcomputer through wireless WIFI. The single chip microcomputer is used for data processing and judging signals transmitted by the sensors, such as judging whether water is accumulated in the box-type substation or not or judging whether the humidity in the air in the box-type substation is low enough or not. And when the water immersion in the box-type substation is confirmed, starting the drainage pump, and automatically extracting accumulated water in the box-type substation. And if the accumulated water in the box-type substation is completely discharged after the drainage pump is started for a period of time, the controller controls the drainage pump to be closed through a response program.
When the air humidity in the box-type substation is higher than a first humidity threshold value, acquiring the working state of a drainage pump at the previous moment, and if the drainage pump at the previous moment is in the working state, delaying ten seconds for starting an air blower and an air supply fan; if the drainage pump is in the closed state in the previous moment, the blower and the air supply fan are started immediately. And when the air humidity in the box-type substation is lower than a second humidity threshold value, the air blower and the air supply fan are turned off. Through the flow of draining water first and then dehumidifying, the conflict between unnecessary draining and dehumidifying is avoided. The first humidity threshold may be different from the second humidity threshold, and the second humidity threshold may be smaller than the first humidity threshold.
By the box-type substation dehumidification control circuit, the accumulated water condition in the box-type substation and the humidity signal in the box-type substation can be automatically measured without manual operation; and a hysteresis control method is adopted to control the working state of the box-type substation dehumidification equipment so as to achieve the dehumidification effect.
In one embodiment, a box-type substation dehumidification system is provided, and the box-type substation dehumidification control circuit of any one of the above embodiments is connected with the box-type substation dehumidification device.
In one embodiment, the device further comprises a condensation pipe; the box-type substation dehumidification equipment comprises an air blower and an exhaust fan;
The box-type substation comprises a first side and a second side; the first side is opposite to the second side; the condensation pipe is communicated with the first side and is connected with the blower; the exhaust fan is arranged on the second side;
when the blower is started, air enters the box-type substation through the condenser pipe and is exhausted from the exhaust fan.
Specifically, the condensing pipe is arranged at the air inlet of the air blower, so that moisture in the air is condensed and the air humidity in the air is reduced, and the air sent into the box-type substation is ensured to be dry air.
In one embodiment, as shown in fig. 6, the system further comprises a heating device and a water tank arranged outside the box-type substation; the box-type substation dehumidification equipment also comprises a drainage pump arranged in the box-type substation; the first side is provided with a first drainage hole;
The draining pump drains accumulated water of the box-type substation to the water tank through the first draining hole; the condensation pipe is connected with the air blower through heating equipment and is provided with a second drain hole corresponding to the water tank;
when the air blower is started, air enters the box-type substation through the heating equipment and the condenser pipe in sequence.
Wherein, the heating device can be an additional coil.
Specifically, the inlet air is heated by additionally arranging the coil heating equipment at the inlet air, the moisture in the inlet air is condensed by the condenser, and the condensed water is discharged through the second drain hole to ensure that the air sent into the box-type substation is dry gas, so that the moisture in the air in the box-type substation is condensed into water drops on the condenser pipe without replacing an air dryer or a drying agent.
In one embodiment, as shown in fig. 7, there is provided a box substation dehumidification control method, including the following steps:
Step 710, the signal acquisition circuit transmits the acquired water immersion signal to the signal comparison circuit;
Step 720, the signal comparison circuit transmits a water accumulation signal to the control module when the water immersion signal is greater than or equal to the water immersion threshold value;
Step 730, the temperature and humidity detection module transmits the detected humidity signal to the control module;
And 740, controlling the working state of the box-type substation dehumidification equipment by the control module according to the accumulated water signal and the humidity signal.
it should be understood that, although the steps in the flowchart of fig. 7 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 7 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 8. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing humidity signal data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to realize a box-type substation dehumidification control method.
those skilled in the art will appreciate that the architecture shown in fig. 8 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
it will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
the above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A box-type substation dehumidification control circuit is characterized by comprising a control module connected with box-type substation dehumidification equipment; the system also comprises a water immersion detection module and a temperature and humidity detection module which are arranged in the box-type substation; the control module is respectively connected with the water immersion detection module and the temperature and humidity detection module;
The water immersion detection module comprises a signal acquisition circuit and a signal comparison circuit which is respectively connected with the signal acquisition circuit and the control module; the signal acquisition circuit comprises a first water sensor, a second water sensor, a power supply, a first resistor and a second resistor;
One end of the first water sensor is connected with one end of the first resistor and the power supply respectively, and the other end of the first water sensor is connected with one end of the second resistor; one end of the second water sensor is connected with the other end of the first resistor and the signal comparison circuit respectively, and the other end of the second water sensor is connected with the other end of the second resistor and the power supply respectively.
2. The box substation dehumidification control circuit of claim 1, wherein the box substation comprises a first side and a second side; the first side is opposite the second side;
The first water sensor is arranged on the first side; the second water sensor is arranged on the second side.
3. The box substation dehumidification control circuit of claim 1, wherein the signal comparison circuit comprises a comparator for connection to a reference power source;
And a first signal input end of the comparator is connected with one end of the second water sensor, a second signal input end of the comparator is used for being connected with the reference power supply, and a signal output end of the comparator is connected with the control module.
4. The dehumidification control circuit of the box-type substation according to any one of claims 1 to 3, wherein the temperature and humidity detection module comprises a master station communication unit connected with the control module and at least one temperature and humidity signal acquisition unit; the temperature and humidity signal acquisition unit is connected with the master station communication unit.
5. the dehumidification control circuit of the box-type substation according to claim 4, wherein the temperature and humidity signal acquisition unit comprises a temperature and humidity sensor, a first communication chip connected with the temperature and humidity sensor, and a first antenna connected with the first communication chip;
The master station communication unit comprises a second communication chip and a second antenna connected with the second communication chip.
6. The box-type substation dehumidification control circuit of claim 4, wherein the number of the temperature and humidity signal acquisition units is 2;
any one temperature and humidity signal acquisition unit is arranged in a transformer room of the box-type substation, and the other temperature and humidity signal acquisition unit is arranged in a low-voltage distribution room of the box-type substation.
7. the box substation dehumidification control circuit of claim 1, wherein the control module comprises a controller, and at least one isolation drive circuit; the isolation driving circuit is used for connecting an external power supply;
The controller is respectively connected with the signal comparison circuit, the temperature and humidity detection module and the isolation driving circuit.
8. the substation dehumidification control circuit of claim 7, wherein the isolation drive circuit comprises an optocoupler and a relay for connection to the substation dehumidification device;
The optical coupler is respectively connected with the relay, the controller and the external power supply.
9. A box-type substation dehumidification system is characterized by comprising box-type substation dehumidification equipment and the box-type substation dehumidification control circuit connected with the box-type substation dehumidification equipment, wherein the box-type substation dehumidification control circuit is as claimed in any one of claims 1 to 8.
10. The box substation dehumidification system of claim 9, further comprising a condenser tube; the box-type substation dehumidification equipment comprises an air blower and an exhaust fan;
The box-type substation comprises a first side and a second side; the first side is opposite the second side; the condensation pipe is communicated with the first side and is connected with the blower; the exhaust fan is arranged on the second side;
when the air blower is started, air enters the box-type substation through the condensation pipe and is exhausted from the exhaust fan.
11. The substation dehumidification system of claim 10, further comprising a heating device and a sink located outside the substation; the box-type substation dehumidification equipment further comprises a drainage pump arranged in the box-type substation; the first side is provided with a first drainage hole;
the draining pump drains accumulated water of the box-type substation to the water tank through the first draining hole; the condensation pipe is connected with the air blower through the heating equipment and is provided with a second drain hole corresponding to the water tank;
when the air blower is started, air enters the box-type substation through the heating equipment and the condenser pipe in sequence.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109947145A (en) * | 2019-03-29 | 2019-06-28 | 广州供电局有限公司 | Box-type substation Dehumidification controlling circuit and dehumidification system |
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Effective date of registration: 20200928 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
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