CN212969497U - Variable frequency speed regulation temperature control system - Google Patents
Variable frequency speed regulation temperature control system Download PDFInfo
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- CN212969497U CN212969497U CN202022320656.5U CN202022320656U CN212969497U CN 212969497 U CN212969497 U CN 212969497U CN 202022320656 U CN202022320656 U CN 202022320656U CN 212969497 U CN212969497 U CN 212969497U
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Abstract
The utility model discloses a variable frequency speed regulation temperature control system, which comprises a temperature transmitter, a temperature sensor, a programmable controller, a frequency converter, a power output end and a cooling fan; the temperature transmitter is electrically connected with the programmable controller and the temperature sensor, the frequency converter is electrically connected with the programmable controller and the power output end, and the power output end is electrically connected with the cooling fan; the temperature sensor adopts a fluorescent optical fiber temperature sensor; the temperature transmitter receives the signal of the temperature sensor, filters, amplifies and processes the signal, and then sends the signal to the programmable controller according to an agreed communication protocol; programmable controller sends control command for the converter through the PID algorithm according to surveying temperature value, controls converter output frequency's change, drives cooling blower, the utility model discloses can the accurate temperature of measuring high-tension apparatus to according to temperature control cooling blower's rotational speed, with the regulation running temperature environment, reduced the energy consumption of fan, improved consumer and cooling blower's life.
Description
Technical Field
The utility model relates to an electric control by temperature change field especially relates to high-pressure environment down conversion speed governing temperature control system.
Background
Many electric devices in industrial fields generate a large amount of heat in the using process, and the service life of the electric devices can be seriously influenced if the heat cannot be discharged in time.
For example, the SVG static var generator uses a turn-off power electronic device (IGBT) to form a self-commutation bridge circuit, and is connected in parallel to the power grid through a reactor, so as to appropriately adjust the amplitude and phase of the output voltage at the ac side of the bridge circuit, or directly control the current at the ac side thereof, and rapidly absorb or emit the required reactive power, thereby achieving the purpose of rapidly and dynamically adjusting the reactive power.
The power unit in the SVG equipment will produce a large amount of heats in service, in order to make these heats can in time radiate, generally adopt forced air-cooled heat dissipation, install many cooling blower promptly on the cabinet top, make the cold air pass through in the filter layer gets into the high-voltage power cabinet before the cabinet, heat with components and parts gived off passes through the heat exchange back, pass through the wind channel by cooling blower with the heat in the cabinet and discharge to outdoor, but the inside power unit of SVG equipment, not all the time all at high load operation, its size that generates heat has close relation with the load, its inside module temperature constantly changes along with load change, however the cooling blower of SVG in the current design is but long-term work under power frequency, cause the unnecessary energy waste and shorten cooling blower's electric life.
In addition, under the condition that the power frequency continuously operates, the indoor electric equipment is continuously in a very large negative pressure state, and the negative pressure environment easily causes dust accumulation of the electric equipment, so that the electric insulation of the high-voltage equipment is influenced, and the service life of the electric equipment is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: a variable frequency speed regulation temperature control system is provided.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the utility model provides a variable frequency speed governing temperature control system, includes programmable controller, converter, temperature transmitter, temperature sensor, power take off and cooling blower, temperature sensor electricity is connected temperature transmitter, temperature transmitter electricity connection programmable controller, the converter is connected to the programmable controller electricity, the converter passes through power take off electricity and connects cooling blower.
The temperature sensor adopts a fluorescent optical fiber temperature sensor and is used for sensing the temperature of external electric equipment;
the temperature transmitter is used for filtering, amplifying and processing the weak electric signal sent by the temperature sensor and sending the weak electric signal to the programmable controller through an agreed communication protocol;
the programmable controller sends a control instruction to the frequency converter through PID control according to a temperature signal sent by the temperature transmitter to control the change of the frequency converter;
the frequency converter is used for driving the cooling fan through the power output end.
Compared with the prior art, the utility model, following technological effect has:
under high-pressure environment, through novel fluorescence formula optic fibre temperature sensor, gather the temperature of consumer in real time to according to the rotational speed of different temperature value control cooling blower, reach the purpose of control consumer temperature. On the premise of ensuring the temperature of the electric equipment in a safety range, the overall energy consumption is reduced.
The cooling fan does not work in a power frequency state (particularly in autumn and winter), the indoor negative pressure condition is reduced, the dust deposition effect is reduced, and the service lives of the electric equipment and the cooling fan are prolonged.
By adopting the fluorescent optical fiber temperature sensor, the measurement process is not interfered by high voltage and strong electromagnetism, and the device is stable and reliable and improves the stability of the operation of the device.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Preferably, the intelligent control system is further provided with a touch screen, and the touch screen is electrically connected with the programmable controller and is used for realizing man-machine interaction, such as setting the adjustment range and temperature of the frequency converter, inquiring data of an equipment operation history curve and the like.
Preferably, the power supply is further provided with a power frequency change-over switch, the power frequency change-over switch comprises an input end, a first output end and a second output end, the input end is electrically connected with the power supply, the first output end is electrically connected with the frequency converter, the second output end is electrically connected with the power output end, and the power output end can only be electrically connected with the power supply or the output end of the frequency converter at the same time through the power frequency change-over switch.
The beneficial effect of adopting above-mentioned further scheme is that, when frequency conversion control system broke down, can switch to power frequency control, did not influence the operation of external equipment whole.
Drawings
Fig. 1 is a schematic structural diagram of a variable frequency speed control system of the present invention;
in the drawings, the parts names represented by the respective reference numerals are listed as follows:
1. a master control system; 1-1, a temperature transmitter; 1-2, a temperature sensor; 1-3, a programmable controller; 1-4, a frequency converter; 1-5, a variable/power frequency change-over switch; 1-6, power output end; 2. a touch screen; 3. and (5) cooling the fan.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Fig. 1 is a schematic structural diagram of a variable frequency speed control system according to the present invention. In this embodiment, this system is used for controlling the cooling blower of SVG equipment.
The variable-frequency speed regulation control system comprises a main control system 1, a touch screen 2 and a cooling fan 3, wherein the main control system 1 comprises a temperature transmitter 1-1, a temperature sensor 1-2, a programmable controller 1-3, a frequency converter 1-4, a variable/power frequency change-over switch 1-5 and a power output end 1-6, the temperature sensor 1-2 is electrically connected with the temperature transmitter 1-1, the temperature transmitter 1-1 is electrically connected with the programmable controller 1-3, the programmable controller 1-3 is electrically connected with the frequency converter 1-4, and the frequency converter 1-4 is electrically connected with the power output end 1-6; the power frequency changing/changing switch 1-5 comprises an input end, a first output end and a second output end, wherein the input end is electrically connected with a 380V power supply, the first output end is electrically connected with the frequency converter 1-4, and the second output end is electrically connected with the power output end 1-6; the power output ends 1-6 are electrically connected with a cooling fan 3, and the cooling fan 3 is used for cooling external electrical equipment;
the temperature sensor 1-2 adopts a fluorescent optical fiber temperature sensor and is used for sensing the temperature of elements in the SVG equipment;
the temperature transmitter 1-1 is used for receiving a weak electric signal transmitted by the temperature sensor, filtering, amplifying and processing the weak electric signal, and then transmitting the weak electric signal to the programmable controller 1-3 by an agreed communication protocol such as an HART protocol;
the programmable controller 1-3 sends a control instruction to the frequency converter 1-4 according to the temperature sent by the temperature transmitter 1-1, and controls the frequency converter 1-4 to increase the frequency, decrease the frequency or maintain the current frequency unchanged;
and the frequency converter 1-4 drives the cooling fan 3 through the power output end 1-6.
The touch screen 2 is used for realizing man-machine interaction, so that an operator can check the running condition of the current master control system, adjust the adjustment range and temperature of the frequency converter, operate data of equipment, query measures of faults and the like.
The utility model discloses can practice thrift a large amount of electric energy:
according to the cubic load relation of the fan: P/P0＝(n/n0)3Calculation of P in the formula0Rated speed n0Power of time; p is the power at speed n.
Take an example of an 11kW blower used by an SVG. The operation was still continuous for 24 hours with 90% load (frequency calculated as 46 Hz) for 11 hours and 50% load (frequency calculated as 20 Hz) for 13 hours per day; the annual running time is calculated according to 300 days. The annual electricity saving amount during variable frequency speed regulation is as follows:
W1＝11×11×[1－(46/50)3]×300＝8033kW·h
W2＝11×13×[1－(20/50)3]×300＝40155kW·h
Wb＝W1+W2＝8033+40155＝48188kW·h
the SVG adopts the scheme, the power saving of one SVG per year is estimated to be 48188 kW.h, and the power saving is more objective for high-power equipment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (3)
1. A variable-frequency speed-regulating temperature control system comprises a programmable controller, a frequency converter, a temperature transmitter, a temperature sensor, a power output end and a cooling fan, wherein the temperature sensor is electrically connected with the temperature transmitter;
the temperature sensor adopts a fluorescent optical fiber temperature sensor and is used for sensing the temperature of external electric equipment;
the temperature transmitter is used for filtering, amplifying and processing the weak electric signal sent by the temperature sensor and sending the weak electric signal to the programmable controller through an agreed communication protocol;
the programmable controller sends a control instruction to the frequency converter through PID control according to a temperature signal sent by the temperature transmitter to control the change of the frequency converter;
and the frequency converter controls the rotating speed of the cooling fan through a power output end.
2. The variable-frequency speed-regulating temperature control system according to claim 1, further comprising a touch screen electrically connected with the programmable controller for human-computer interaction.
3. The variable-frequency speed-regulating temperature control system according to claim 1 or 2, characterized in that a variable/power-frequency change-over switch is further provided, the variable/power-frequency change-over switch comprises an input end, a first output end and a second output end, the input end is electrically connected with a power supply, the first output end is electrically connected with the frequency converter, the second output end is electrically connected with the power output end, and the variable/power-frequency change-over switch enables the power output end to be electrically connected with only the power supply or the output end of the frequency converter at the same time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022320656.5U CN212969497U (en) | 2020-10-16 | 2020-10-16 | Variable frequency speed regulation temperature control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022320656.5U CN212969497U (en) | 2020-10-16 | 2020-10-16 | Variable frequency speed regulation temperature control system |
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| CN212969497U true CN212969497U (en) | 2021-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810645A (en) * | 2022-03-30 | 2022-07-29 | 苏州协鑫新能源运营科技有限公司 | Method for improving operation mode of SVG (static var generator) cooling fan of photovoltaic power station |
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2020
- 2020-10-16 CN CN202022320656.5U patent/CN212969497U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810645A (en) * | 2022-03-30 | 2022-07-29 | 苏州协鑫新能源运营科技有限公司 | Method for improving operation mode of SVG (static var generator) cooling fan of photovoltaic power station |
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