CN114115407A - Heating and heat dissipation control circuit and control method for water-cooling converter - Google Patents
Heating and heat dissipation control circuit and control method for water-cooling converter Download PDFInfo
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- CN114115407A CN114115407A CN202111646179.4A CN202111646179A CN114115407A CN 114115407 A CN114115407 A CN 114115407A CN 202111646179 A CN202111646179 A CN 202111646179A CN 114115407 A CN114115407 A CN 114115407A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention provides a heating and heat dissipation control circuit and a control method for a water-cooling converter, wherein the circuit comprises: the device comprises a detection plate, a thermistor, a temperature sensor, a humidity controller S6, a cooling fan M1, a relay K1, a contactor KM1, a relay K6, a water cooling system heater and a power supply; the K1 coil and the K6 coil are both connected with the detection plate; the K1 first contact is connected with the K6 contact in parallel, is connected with the coil of the contactor KM1 in series and is connected with a power supply; one end of the KM1 contact is connected with the cooling fan in series, and the other end of the KM1 contact is connected with a power supply; the K1 second contact is connected with the water cooling system heater; the thermistor is connected with the detection board and used for measuring the water temperature at the water inlet of the water-cooling converter; the humidity controller S6 is connected with the detection board and used for measuring the ambient humidity in the converter cabinet. The invention saves heaters in the converter cabinet, and reduces the number of temperature sensors and humidity controllers; and contacts and relays of a fan control loop are reduced, and the hardware failure rate is reduced.
Description
Technical Field
The invention belongs to the field of control, and particularly relates to a heating and heat dissipation control circuit and a control method for a water-cooling converter.
Background
With the rapid development of clean energy such as wind energy and the like, the installed capacity of wind power generation in China is always increased, and the influence on the operation of a power grid is not negligible. The wind power converter is used as a core device in the wind generating set, undertakes conversion from mechanical energy to electric energy of the wind generating set, and the reliability of the wind power converter directly affects the utilization rate of the whole machine and even threatens safe and stable operation of a power grid. Because wind power converter application environment is complicated changeable, including severe environment such as severe cold, humidity, high temperature, therefore the converter all will heat before starting the machine, necessary preparation work such as dehumidification, will dispel the heat after the start-up operation, solves the problem that ambient temperature crosses the device and can not reliably work excessively on the one hand, and on the other hand avoids the too big insulating of reduction system of humidity, arouses electrical short circuit trouble. The safe operation of the heat dissipation system is an important component for ensuring the safe and stable operation of the converter, and the operation safety of the wind power converter equipment can be ensured by adding a temperature and humidity detection device, a heater and a fan control loop.
As shown in the schematic diagram of a control loop of a conventional converter heating and heat dissipating system shown in fig. 2, the system adopts an independent heating and independent heat dissipating manner, and the design method thereof has no problem in theory. The following analysis shows that:
the converter is provided with three cabinets with independent spaces, each cabinet is provided with an independent heating loop, a mechanical temperature controller and a humidity controller are adopted for detection, QF2 is closed firstly, when the temperature is lower than a certain temperature, the mechanical temperature controller 1S1 is closed, a heater E1 starts to heat, and when the temperature is higher than the certain temperature, 1S1 is disconnected, and heating is stopped; when the humidity is higher than a certain humidity, the humidity controller 1S2 is closed, the heater E1 starts heating, when the humidity is lower than a certain humidity, the humidity controller 1S2 is disconnected, the heater E1 stops heating, when the heater 1S1 and the heater 1S2 fail, the heater is always heated, the service life of a device and heat dissipation in a cabinet are affected, and therefore the mechanical temperature controller 1S3 is added, when the temperature exceeds a preset value, the heater 1S3 is disconnected, but when the heater 1S3 still fails and cannot be disconnected, the same problem still exists.
And in the heat dissipation loop, after heating is finished, the switching power supply G1 is powered on, the converter runs, the circuit board AP6 detects the temperature of the PT100, when the temperature reaches a preset value, X2.1 and X2.2 of the circuit board AP6 are controlled to be closed, the relay K2 is closed, the contactor KM2 is controlled to be closed, and the heat dissipation fan 1M1 is controlled to be started. From the operation condition of the system, the problems that a relay, a contactor and a breaker are easy to damage and low in reliability exist for a long time are found.
The prior art has the following problems:
1. the heating loop adopts a mechanical temperature controller and a humidity controller, a dry contact signal is given when a set temperature value or a set humidity value is reached, and the heating and the dehumidification of the system are controlled. The method has the main defects that the specific values of the temperature and the humidity in the cabinet cannot be obtained in real time, the sampling deviation is large, and the control precision is not high. The mechanical failure rate is high, the cost is high, and once the failure unit is in a heating state all the time, potential safety hazards exist.
2. The heat dissipation loop is an important component of safe and stable operation of the converter, but a relay of the heat dissipation loop is powered by a 24V power supply, the more the number of contactors is, the higher the fault rate is, the relays, contactors and circuit breakers are easy to damage, and the problem of low reliability of the heat dissipation loop exists for a long time;
disclosure of Invention
In order to solve the technical problems, the invention provides a heating and heat dissipation control circuit and a control method for a water-cooling converter, so as to solve the technical problems.
The invention discloses a heating and heat dissipation control circuit of a water-cooling converter in a first aspect; the circuit comprises: the device comprises a detection plate, a thermistor, a temperature sensor, a humidity controller S6, a cooling fan M1, a relay K1, a contactor KM1, a relay K6, a water cooling system heater and a power supply;
the relay K1 includes: a K1 coil, a K1 first contact, a K1 second contact;
the relay K6 includes: k6 coil, K6 contact;
the contactor KM1 included: KM1 coil, KM1 contact;
one end of each of the K1 coil and the K6 coil is connected with the detection plate, and the other end of each of the K1 coil and the K6 coil is connected with the power supply; the K1 first contact is connected in parallel with the K6 contact, in series with the KM1 coil, and connected to the power supply; one end of the KM1 contact is connected with the heat dissipation fan in series, and the other end of the KM1 contact is connected with the power supply; the K1 second contact is connected with the water cooling system heater; the thermistor is connected with the detection board and used for measuring the water temperature at the water inlet of the water-cooling converter; the humidity controller S6 is connected with the detection board and used for measuring the environmental humidity; specifically, the humidity controller S6 is a mechanical humidity controller S6; the temperature sensor is connected with the detection plate and used for dynamically measuring the ambient temperature in real time; the detection board is connected with the power supply.
The circuit according to the first aspect of the present invention further comprises a protection switch F1, the protection switch F1 being arranged between the KM1 contact and the power source.
According to the circuit of the first aspect of the present invention, the power supply is 220 VAC.
According to the circuit of the first aspect of the present invention, the first contact of K1 and the second contact of K1 are both in a normally open state.
According to the circuit of the first aspect of the present invention, the K6 contact is normally open.
According to the circuit of the first aspect of the present invention, the KM1 contact is normally open.
The second aspect of the invention discloses a control method of a heating and heat dissipation control circuit of a water-cooling converter; according to any one of the first aspect, the specific control method of the heating and heat dissipation control circuit of the water-cooled converter comprises the following steps:
after the detection plate is electrified, the temperature of a water inlet of the water cooling system is automatically detected through the thermistor, and whether the temperature is lower than a first preset value or not is judged; the detection board judges whether the humidity controller S6 is larger than a preset humidity value or not, if so, a high level signal is given, and otherwise, a low level signal is given; when the two conditions meet one of the conditions, the detection plate control relay K1 is electrified, the first contact of the K1 is closed, and the water cooling system heater is controlled to start to heat; meanwhile, a second contact of K1 is closed, the KM1 coil is electrified, the KM1 contact is controlled to be closed, and the cooling fan M1 is started;
the detection board monitors the ambient temperature in real time through a temperature sensor, when the ambient temperature reaches a second preset value and a feedback signal of the humidity controller S6 is at a low level, namely the detection board detects that the humidity of the humidity controller S6 is less than or equal to a preset humidity value, heating is stopped; the detection plate controls the K1 coil to lose power, the K1 first contact and the K1 second contact are both disconnected, the water cooling system heater stops heating, the KM1 coil loses power, the KM1 contact is disconnected, and the cooling fan M1 stops working;
the detection board monitors the ambient temperature through a temperature sensor, when the ambient temperature exceeds a third preset value, the K6 coil is controlled to be powered on, meanwhile, the K6 contact is closed, the coil of the KM1 is controlled to be powered on, at the moment, the contactor KM1 is closed, the cooling fan M1 is started to dissipate heat, meanwhile, the detection board monitors the ambient temperature in real time through the temperature sensor, when the ambient temperature is lower than the third preset value, the detection board controls the K6 coil to be powered off, the K6 contact is disconnected, the KM1 coil is powered off, the KM1 contact is disconnected, and the cooling fan M1 stops working.
According to the control method of the second aspect of the invention, the first preset value is-5 ℃; the second preset value was 5 ℃.
According to the control method of the second aspect of the invention, the first preset humidity value is 80% humidity.
According to the control method of the second aspect of the invention, the third preset value is 30 ℃.
Therefore, the proposal provided by the invention saves heaters in the converter cabinet, and reduces the number of temperature sensors and humidity controllers; and contacts and relays of a fan control loop are reduced, and the hardware failure rate is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a heating and heat dissipation control circuit of a water-cooled converter according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a heating and heat dissipation control circuit of a water-cooled converter in the prior art.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
Example 1:
the invention discloses a heating and heat dissipation control circuit of a water-cooled converter in a first aspect, fig. 1 is a structural diagram of the heating and heat dissipation control circuit of the water-cooled converter according to an embodiment of the invention, specifically as shown in fig. 1, the circuit includes: the device comprises a detection board AP1, a thermistor NTC, a temperature sensor PT100, a humidity controller S6, a cooling fan M1, a relay K1, a contactor KM1, a relay K6, a water cooling system heater and a power supply;
the relay K1 includes: a K1 coil, a K1 first contact, a K1 second contact;
the relay K6 includes: k6 coil, K6 contact;
the contactor KM1 included: KM1 coil, KM1 contact;
one end of each of the K1 coil and the K6 coil is connected with the detection plate, and the other end of each of the K1 coil and the K6 coil is connected with the power supply; the K1 first contact is connected in parallel with the K6 contact, in series with the KM1 coil, and connected to the power supply; one end of the KM1 contact is connected with the heat dissipation fan in series, and the other end of the KM1 contact is connected with the power supply; the K1 second contact is connected with the water cooling system heater; the thermistor NTC is connected with the detection plate and used for measuring the water temperature at the water inlet of the water-cooling converter; the humidity controller S6 is connected with the detection board and used for measuring the environmental humidity;
the temperature sensor PT100 is connected with the detection plate and used for dynamically measuring the ambient temperature in real time; the detection board is connected with the power supply and controls all components connected to the detection board.
The circuit also includes a protection switch F1, the protection switch F1 disposed between the KM1 contacts and the power source.
In a particular embodiment, the first K1 contact and the second K1 contact are both normally open; the K6 contact is in a normally open state; the KM1 contact is in a normally open state;
the power supply is 220VAC, the protection switch F1 is firstly closed, the power supply supplies 400V voltage to supply power to the cooling fan M1 and the detection board AP1, the detection board AP1 supplies power for 220VAC, is not limited by a 24V power supply and can be started at low temperature.
Example 2:
the embodiment provides a control method of a heating and heat dissipation control circuit of a water-cooled converter, and the control method of the heating and heat dissipation control circuit of the water-cooled converter according to any one of embodiments 1 includes:
after the detection plate is electrified, the temperature of a water inlet of the water cooling system is automatically detected through the thermistor, and whether the temperature is lower than a first preset value or not is judged; the detection board judges whether the humidity controller S6 is larger than a preset humidity value or not, if so, a high level signal is given, and otherwise, a low level signal is given; when the judgment of the two conditions meets one of the conditions, the detection plate controls the K1 coil to be electrified, the K1 first contact is closed, the water cooling system heater is started, and heating is started; meanwhile, a second contact of the K1 is closed, the KM1 coil is electrified, the KM1 contact is controlled to be closed, and a heat dissipation fan M1 is started;
the detection board monitors the ambient temperature in real time through a temperature sensor, when the ambient temperature reaches a second preset value and a feedback signal of the humidity controller S6 is low level, namely the detection board detects that the humidity of the humidity controller S6 is smaller than or equal to a preset humidity value, the detection board controls the K1 coil to lose power, the K1 first contact and the K1 second contact are both disconnected, the water cooling system heater stops heating, the KM1 coil loses power, the KM1 contact is disconnected, and the cooling fan M1 stops working;
the detection plate monitors the ambient temperature through a temperature sensor, when the ambient temperature exceeds a third preset value, the coil K6 is controlled to be powered on, meanwhile, the contact K6 is closed, the coil KM1 is controlled to be powered on, at the moment, the contact KM1 is closed, the heat dissipation fan M1 is started to dissipate heat, meanwhile, the detection plate monitors the ambient temperature in real time through the temperature sensor, when the ambient temperature is lower than the third preset value, the detection plate controls the coil K6 to be powered off, the contact K6 is disconnected, the coil KM1 is powered off, the contact KM1 is disconnected, and the heat dissipation fan M1 stops working.
As shown in fig. 1, in some specific embodiments, the specific control method is as follows:
the heating control method comprises the following steps: after a detection plate AP1 is powered on, the water temperature at a water inlet of a water cooling system is automatically detected through a thermistor NTC, whether the water temperature is lower than minus 5 ℃ is judged to be a first preset value, whether the humidity detected by a mechanical humidity controller S6 is greater than 80% is judged to be a preset humidity value, if the humidity is greater than 80%, a high level signal is given, otherwise, a low level signal is given, and one of the two signals meets the condition, a DO of the detection plate AP1 controls coils of an X3.1 relay K1 and an X3.2 relay K1 to be electrified, normally open points 21 and 24 of a K1 contact control a water cooling system heater to be started to start heating, meanwhile normally open points 11 and 14 of a K1 contact control coil KM1 to be electrified, a contactor KM1 is closed, and a cooling fan M1 in the cabinet is started to heat; with the continuous rising of water temperature, hot gas in the cabinet flows along with the air duct to carry out heating dehumidification, the temperature of a temperature sensor PT100 is monitored by a detection board AP1 in real time, when the temperature reaches 5 ℃, namely a second preset value, and a feedback signal of a humidity controller S6 is low level, the heating is stopped, the detection board AP1 controls relays K1 of X3.1 and X3.2 to lose power, namely the detection board controls the K1 coil to lose power, the K1 first contact and the K1 second contact are both disconnected, a water cooling system heater stops heating, the KM1 coil loses power, the KM1 contact is disconnected, and a cooling fan M1 stops working.
The heat dissipation control method comprises the following steps: the detection board AP1 monitors the environmental temperature through a temperature sensor PT100, when the environmental temperature exceeds a set value of 30 ℃, namely a third preset value, X3.3 and X3.4 are controlled to be closed to a relay K6, K6 contact normally-open points 11 and 14 of a relay K6 control coils of KM1 to be electrified, a contactor KM1 is closed, a heat dissipation fan M1 in a cabinet is started to dissipate heat, meanwhile, the detection board AP1 monitors the temperature of the PT100 in real time, when the temperature of the PT100 is lower than 30 ℃, the fan stops, the detection board AP1 controls relays K6 of X3.3 and X3.4 to be powered off, namely, the detection board controls the K6 coil to be powered off, the K6 contact is disconnected, the KM1 coil is powered off, the KM1 contact is disconnected, and then the heat dissipation fan M1 stops working.
The detection board AP1 sends PT100 temperature and water inlet water temperature NTC data acquired in real time to an FPGA processor chip through IIC bus communication, the FPGA processor receives and analyzes the data and then stores the data in an internal register, and finally a main controller chip DSP28335 reads a value in the FPGA internal register through an EMIF bus communication mode, so that real-time temperature and humidity in a cabinet are obtained, and whether the whole converter system needs to perform heating and dehumidifying operations is judged.
In summary, the technical solutions of the aspects of the present invention have the following advantages compared with the prior art:
the power supply of the detection board AP1 and the relays K1 and K6 is changed from direct current (24 VDC) to 220VAC, the voltage range of the coil is wide, the low-temperature starting is met, the coil can act before being heated, and a heater is not used; the heater of the external water cooling system is used, and the air duct in the cabinet is used for heating and radiating, so that the heater and the temperature detector in the cabinet are saved; the number of contacts and relays of the fan control loop is reduced, and the failure rate of hardware is reduced.
It should be noted that the technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, the scope of the present description should be considered. The above examples 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 invention. 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 (10)
1. The utility model provides a water-cooling converter heating heat dissipation control circuit which characterized in that, the circuit includes: the device comprises a detection plate, a thermistor, a temperature sensor, a humidity controller S6, a cooling fan M1, a relay K1, a contactor KM1, a relay K6, a water cooling system heater and a power supply;
the relay K1 includes: a K1 coil, a K1 first contact, a K1 second contact;
the relay K6 includes: k6 coil, K6 contact;
the contactor KM1 included: KM1 coil, KM1 contact;
one end of each of the K1 coil and the K6 coil is connected with the detection plate, and the other end of each of the K1 coil and the K6 coil is connected with the power supply; the K1 first contact is connected in parallel with the K6 contact, in series with the KM1 coil, and connected to the power supply; one end of the KM1 contact is connected with the heat dissipation fan in series, and the other end of the KM1 contact is connected with the power supply; the K1 second contact is connected with the water cooling system heater; the thermistor is connected with the detection board and used for measuring the water temperature at the water inlet of the water-cooling converter; the humidity controller S6 is connected with the detection plate; the temperature sensor is connected with the detection plate; the detection board is connected with the power supply.
2. The heating and heat dissipation control circuit of claim 1, further comprising a protection switch F1, wherein the protection switch F1 is disposed between the KM1 contact and the power supply.
3. The heating and heat dissipation control circuit of claim 1, wherein the power supply is 220 VAC.
4. The heating and heat dissipation control circuit of the water-cooled converter according to claim 1, wherein the first contact of the relay K1 and the second contact of the relay K1 are both in a normally open state.
5. The heating and heat dissipation control circuit of the water-cooled converter according to claim 1, wherein the contact of the relay K6 is in a normally open state.
6. The heating and heat dissipation control circuit of the water-cooled converter according to claim 1, wherein the KM1 contact is normally open.
7. A control method of a heating and heat dissipation control circuit of a water-cooled converter is characterized in that the control method comprises the following steps:
after the detection plate is electrified, the temperature of water at a water inlet of the water cooling system is automatically detected through the thermistor, and whether the temperature is lower than a first preset value or not is judged; meanwhile, the detection board judges whether the humidity controller S6 is larger than a preset humidity value or not, and if the humidity controller S6 is larger than the preset humidity value, a high-level signal is given; when the judgment of the two conditions meets one of the conditions, the detection plate controls the K1 coil to be electrified, the K1 first contact is closed, the water cooling system heater is started, and heating is started; meanwhile, a second contact of K1 is closed, the KM1 coil is electrified, the KM1 contact is controlled to be closed, and the cooling fan M1 is started;
the detection board monitors the ambient temperature in real time through a temperature sensor, when the ambient temperature reaches a second preset value and a feedback signal of the humidity controller S6 is low level, namely the detection board detects that the humidity of the humidity controller S6 is smaller than or equal to a preset humidity value, the detection board controls the K1 coil to lose power, the K1 first contact and the K1 second contact are both disconnected, the water cooling system heater stops heating, the KM1 coil loses power, the KM1 contact is disconnected, and the cooling fan M1 stops working;
the detection plate monitors the ambient temperature through a temperature sensor, when the ambient temperature exceeds a third preset value, the coil K6 is controlled to be powered on, meanwhile, the contact K6 is closed, the coil KM1 is controlled to be powered on, at the moment, the contact KM1 is closed, the heat dissipation fan M1 is started to dissipate heat, meanwhile, the detection plate monitors the ambient temperature in real time through the temperature sensor, when the ambient temperature is lower than the third preset value, the detection plate controls the coil K6 to be powered off, the contact K6 is disconnected, the coil KM1 is powered off, the contact KM1 is disconnected, and the heat dissipation fan M1 stops working.
8. The control method of the heating and heat dissipation control circuit of the water-cooled converter according to claim 7, wherein the first preset value is-5 ℃ and the second preset value is 5 ℃.
9. The control method of the heating and heat dissipation control circuit of the water-cooled converter according to claim 7, wherein the preset humidity value is 80% humidity.
10. The control method of the heating and heat dissipation control circuit of the water-cooled converter according to claim 7, wherein the third preset value is 30 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646179.4A CN114115407A (en) | 2021-12-30 | 2021-12-30 | Heating and heat dissipation control circuit and control method for water-cooling converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646179.4A CN114115407A (en) | 2021-12-30 | 2021-12-30 | Heating and heat dissipation control circuit and control method for water-cooling converter |
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| Publication Number | Publication Date |
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| CN114115407A true CN114115407A (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111646179.4A Pending CN114115407A (en) | 2021-12-30 | 2021-12-30 | Heating and heat dissipation control circuit and control method for water-cooling converter |
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| Country | Link |
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| CN (1) | CN114115407A (en) |
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2021
- 2021-12-30 CN CN202111646179.4A patent/CN114115407A/en active Pending
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