KR100462802B1 - Driving system for turbo cooling in tr - Google Patents

Abstract

A turbocooled operating system of a transformer is disclosed. According to the present invention, at least one cooling device fixedly installed to one side of the lower end of the switchgear; A panel meta for generating power information including load ratio information, continuous overload information, continuous unbalanced load information, and phase information of a transformer; A control unit for controlling a cooling device and a warning sound output based on the power information extracted from the panel meta, and performing a display according to the power information; And an input unit for arbitrarily or automatically setting a driving time or cooling temperature of the cooling device, and forming at least one cooling fan into a housing such as a distribution panel equipped with a transformer or an instrument transformer to form the at least one cooling fan. By cooling the overheating condition caused by the overload, it can increase the efficiency of the transformer to stably overuse the basic capacity, there is no separate transformer expansion can create industrial benefits. In addition, it is possible to reduce the waste of excessive initial installation cost and normal no-load loss by calculating excessive design capacity.

Description

Turbo Cooling Operation System for Transformers {DRIVING SYSTEM FOR TURBO COOLING IN TR}

The present invention relates to cooling of a transformer, and more particularly, to a turbo cooling operation system of a transformer for increasing the power consumption without additional transformer by performing turbo cooling according to the load of the switchgear.

In general, a switchgear including a switchgear device is formed as an integrated box, and is installed by transporting a forklift or a crane in the building during installation. Such a switchgear overlaps power control elements to reduce its volume. Many of the power control elements are integrated into the integrated enclosure, so that the spacing between the elements becomes dense. Referring to the switchgear as an example as follows.

1 illustrates power control elements inherent in a conventional switchgear.

The switchboard 100 constitutes a frame 101 for forming a housing having a predetermined size. The frame 101 is divided into a front space and a rear space so that the front space can be mounted with a display and switching device for power distribution, and the rear space is divided into a top and a bottom so that the arrangement of the power control elements is overlapped.

An upper section of the frame 101 is provided with an automatic failure switch (AISS: Automatic Section Switch 103) and a power fuse (PF: Power Fuse 105), and a lower portion of the frame 101 includes a transformer (TR: Trans 111). And an instrument transformer (MOF: Metering Out Fit 109). The transformer transformer 109 has a built-in transformer PC / current transformer 107.

In addition, the front space of the frame 101 is equipped with a low-voltage parking circuit breaker (ACB: Air Circuit Breaker 115) and a wire breaker (MCCB: Molded Case Circuit Breaker 113), if necessary, of the web-based UAV monitoring system The operation panel is mounted.

Therefore, the switchgear having a transformer is equipped with a large number of heating elements such as a transformer 111, an instrument transformer 109 and a transformer PC / current transformer 107 in a narrow space, and generates heat in proportion to the power consumption in a closed space. This is done. In general, the power receiving equipment (transformer) is always operated within an average load rate of 30%, and the maximum load for a short time facility generally uses 80% of the capacity.

Considering the stability, the use rate of load rate is 15% in buildings, 25% in apartments, 28% in general manufacturing industry and 50% in special manufacturing industry, and expansion of distribution panels is required without exceeding the maximum capacity of distribution panels. Or by applying an unnecessary higher capacity transformer, the situation is causing the cost increase of the product and the burden of over-investment cost to the consumer.

The present invention was created to solve the above problems, an object of the present invention is to maximize the available capacity of the transformer used in the power receiving equipment to increase the efficiency of the transformer and reduce the cost of the power receiving equipment of the transformer It is to provide a turbo cooling operation system.

Turbo cooling operation system of a transformer according to an aspect of the present invention for achieving the above object, in the switchgear comprising a transformer, at least one cooling device fixedly installed at one side of the lower end of the switchgear; A panel meta for generating power information including load ratio information, continuous overload information, continuous unbalanced load information, and phase information of the transformer; A controller for controlling the cooling device and the output of a warning sound based on the power information extracted from the panel meta and performing a display according to the power information; And an input unit for arbitrarily or automatically setting the driving time or cooling temperature of the cooling device.

Specifically, the cooling device is characterized in that the air-cooled to introduce the outside air into the interior.

1 is a configuration diagram showing a conventional switchgear.

2 is a partial configuration of the switchgear according to the present invention.

3 is a configuration diagram illustrating a control device according to the present invention.

4 is an experimental data showing the change in the capacity of the transformer with respect to the ambient temperature in the present invention.

5 is a graph showing an outline of the actual load ratio calculation turbo function operation.

<Explanation of symbols for the main parts of the drawings>

201: transformer (TR) 203: instrument transformer (MOF)

205 fan 207 cooling unit

301: control unit 303: panel meter (PANNEL METER)

305: display unit 313: warning buzzer

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a view showing the back of the switchgear used in the embodiment of the present invention. The switchgear has a transformer and an instrument transformer therein, and is equipped with a cooling device to prevent overheating of the transformer and instrument transformer. Therefore, the present invention is preferably used in a power supply equipped with a transformer or a transformer including a switchgear.

As shown, a bottom frame 213 having a housing 209 having a predetermined shape and spaced apart from the lower end of the housing 209 is mounted. A spaced frame 211 is provided to space the instrument transformer (MOF: 203) a predetermined distance to the top of the bottom frame 213. In addition, the transformer (TR) 201 is fixedly installed at a specific position of the distribution panel, and constitutes the cooling device 207 with both upper side portions of the bottom frame 213.

The cooling device 207 includes a drive motor and a cooling system for rotating the fan 205 including the fan 205, that is, a compressor, a compression motor, a radiator, and the like. If necessary, the cooling system may be omitted. At this time, the fan 205 may be sucked into the outside air to prevent overheating of the transformer or the transformer.

The rear cover (not shown) of the housing 209 is provided with a plurality of suction holes on both sides facing the cooling device 207 to allow external air to flow therein.

3 is a block diagram for system control according to the present invention.

As shown, a panel meta (PANNEL METER) 303 for generating load factor, continuous overload information, continuous unbalanced load information and imaging information of the transformer 201 or instrument transformer 203, the panel meta ( The control unit 301 and the cooling fan for receiving the information extracted from the 303 by a predetermined communication means, controlling the operation of the cooling fan 207 and the warning buzzer 313 and performing a predetermined display according to the reception result. An input unit 307 for arbitrarily or automatically setting the driving time setting or cooling temperature of 207 is configured.

The cooling fan 207 and the warning buzzer 313 receive a control signal of the controller 301 through the driver 309. In addition, a display unit 305 for display is mounted at the output port of the controller 301. The display unit 305 turns on and off LEDs according to load rates using a plurality of LED elements. The driver 309 is used for power amplification corresponding to the control signal of the controller 301.

The panel METER 303 uses a "digital power measurement controller" and measures the output current of the transformer or instrument transformer by pre-installed CCT and ZCT. The load ratio, continuous overload information, continuous unbalanced load information, and imaging information are calculated based on the measured amount of current change. The calculated result information is transmitted to the input port of the controller 301 through RS485 communication.

The input unit 307 sets the driving time of the cooling fan 207 according to the load ratio of the transformer or instrument transformer.

The controller 301 performs the display of the display unit 305 based on the load ratio information, the continuous overload information, the continuous unbalanced load information, and the imaging information input from the panel meta 303. Then, the driving control of the cooling fan 207 and the warning buzzer 313 is performed based on the driving time of the cooling fan 207 according to the load ratio provided by the input unit 307.

The program of the control unit 301 for the display, for example, when inputting the imaging information, the plurality of LEDs (LED) of the display unit 305 is blinking at a predetermined time interval, a plurality of LEDs (LED) when the unbalanced load is maintained for a certain time ) Causes the flashing sequence to visually indicate the overload condition.

In addition, the controller 301 periodically operates the warning buzzer 313 when it detects that the load ratio is 80% or more, or drives the cooling fan provided from the input unit 307 when continuous overload information is input for a predetermined time overload. The cooling fan 207 is operated for a time. Alternatively, the cooling fan is driven according to the measurement result of the ambient temperature of the transformer or the instrument transformer based on the driving time of the cooling fan corresponding to the set temperature of the transformer or the instrument transformer provided from the input unit 307.

The driving of the cooling fan 207, together with the driving of the fan 205, introduces air outside the housing 209 into the housing 209 to prevent overheating of the transformer 201 and the instrument transformer 203.

The output voltage (power) provided from a large amount of coils provided with the transformer 201 and the instrument transformer 203 decreases by the amount of heat generated by the coil, and the amount of heat generated decreases when the overload is proportional to the load. Therefore, according to the present invention, turbo cooling by the cooling fan 207 is performed to increase the amount of power, that is, the capacity of the transformer. Turbo cooling can be used in excess of the rating without affecting the life of the transformer, the experimental data are shown in Table 1.

Cooling method Multiple of rated output Self cooling / water cooling Before overload Load rate (%) 90 70 50 Time (H) 1/2 1.47 1.50 1.50 One 1.33 1.39 1.45 2 1.20 1.25 1.29 4 1.10 1.14 1.15

Table 1 shows the increase in the short-time overload output when the winding maximum temperature rise is 70 ° C and the ratio of copper loss and iron loss is 4: 1 based on the ambient maximum temperature of 40 ° C. For example, based on a load ratio of 50% In this case, a 130% transformer output increase of about 2 hours is obtained. This means that short-term overload operation can increase usage by up to 30% when limiting rises in the transformer ambient temperature.

According to the ANSI standard, when the ambient standard temperature is set to 30 ° C, the output of the transformer is defined as the maximum load that can be continuously applied at the maximum temperature of the winding. Therefore, if the ambient temperature of the transformer is changed, the continuous maximum load also changes, resulting in an increase in the capacity of the transformer.

4 is experimental data of measuring a change in transformer capacity according to ambient temperature.

The composition ratio of the coil wound around the transformer or instrument transformer, that is, the ratio of copper loss and iron loss is 2: 1 :, 3: 1 and 5: 1, and the ambient temperature is set from -10 to + 50 ℃. The reference data was set at 100 ° C. at ambient temperature.

Due to the driving of the cooling fan 207, when the temperature inside the housing 209 is reduced by 30 ° C, it is shown that approximately 130% is increased. This shows a uniform rate of increase regardless of the ratio of copper loss to iron loss. That is, when operating the cooling fan 207 to a transformer having a basic capacity of 1000KW to lower 30 ℃ than the current ambient temperature, it is possible to use a capacity of 1300KW exceeding the basic capacity 1000KW.

On the other hand, the cooling fan 207 is operated by a drive motor, it is a matter of course that the heat pipe inside the transformer can be quickly discharged to the outside the heat source of the transformer above the rated temperature.

Fig. 5 is a graph showing an outline of the actual load factor calculating turbo function operation, wherein To is shown at the time of operating the turbo function, and Ti is the time point at which the turbo operation is performed. That is, Ti-To is a turbo preparation time as a turbo preparation time.

According to the load factor calculation, the Ti operation time Ti is pre-predicted to determine the turbo function operation To point when the basic capacity is expected to exceed the maximum capacity.In the emergency operation time when the turbo capacity is exceeded, the peak load is directly controlled by the preload control through the peak control. Keep the load within Within the illustrated turbo function capacity, operation and alarm systems are controlled by comprehensive calculation of load unbalance, phase formation, harmonic content, distortion, and input power environment.

As described above, the turbo cooling operation system of the transformer according to the present invention forms at least one cooling fan in a housing such as a distribution panel equipped with a transformer or an instrument transformer, so that the transformer or the instrument transformer is overloaded due to an overload. By cooling the overheated state, it is possible to increase the efficiency of the transformer to stably overuse the basic capacity, there is no separate transformer expansion can create industrial benefits.

In addition, it is possible to reduce the waste of excessive initial installation cost and normal no-load loss by calculating excessive design capacity.

What has been described above is only one embodiment for implementing a turbo cooling operation system of a transformer according to the present invention, and the present invention is not limited to the above-described embodiment, as claimed in the following claims. Without departing from the gist of the present invention, those skilled in the art to which the present invention pertains to the technical spirit of the present invention to the extent that various modifications can be made.

Claims (6)

In a switchgear including a transformer, A cooling device fixedly installed at least one side of the lower side of the switchboard; A panel meta (PANNEL METER) for generating real-time power information related to the operation of the transformer including load ratio information, continuous overload information, continuous unbalanced load information, and phase information of the transformer including transformer temperature and ambient temperature of the switchboard; A controller for controlling the cooling device and the alarm sound output based on the power information extracted from the panel meta, and performing a display according to the power information; And Turbo cooling operation system of the transformer, characterized in that consisting of an input unit for the arbitrary or automatic setting of the drive time setting or cooling temperature of the cooling device. The system of claim 1, wherein the cooling device includes an air cooling system and a forced cooling unit for introducing external air therein. The system of claim 1, wherein the cooling device is a heat pipe. The turbo cooling operation system of claim 1, wherein the alarm sound is periodically generated when the alarm sound output detects that the load ratio is 80% or more from the panel meta. The display apparatus of claim 1, wherein the display of the control unit uses a plurality of LED elements, and the control unit blinks the plurality of LED elements at predetermined time intervals when the imaging information is input from the panel meta. And a display program for sequentially blinking the plurality of LEDs when an unbalanced load is input from a panel meta for a predetermined time. The turbo cooling operation system of claim 5, wherein the plurality of LED elements are mounted at a predetermined range of load ratios.