CN108152647A - Wiring detection method of transformer cooling control cabinet and transformer cooling control cabinet - Google Patents

Abstract

The invention discloses a wiring detection method of a transformer cooling control cabinet and the transformer cooling control cabinet, wherein the transformer cooling control cabinet comprises a driving unit with N driving ends and coolers (N is more than or equal to 2) which are connected with the N driving ends in a one-to-one correspondence manner; the wiring detection method of the transformer cooling control cabinet comprises the following steps: s1, selecting any one of the N driving ends as a target driving end, and inputting a wiring test power supply to the target driving end; s2, detecting the driving voltage of the N coolers; s3, detecting the coolers connected to the target drive terminals according to the drive voltages of the N coolers, and repeating the steps S1-S3N-1 times until the coolers connected to the N drive terminals are detected. The technical scheme of the invention has the characteristic of high reliability.

Description

Wiring detection method of transformer cooling control cabinet and transformer cooling control cabinet

technical field

The invention relates to the technical field of transformer cooling control cabinets, in particular to a wiring detection method of a transformer cooling control cabinet and a transformer cooling control cabinet.

Background technique

At present, in my country's power system, transformers put into operation in the 1990s and before still occupy a considerable proportion, and these transformers are cooled by forced oil circulation air, accounting for more than 80%.

A transformer cooling control system generally includes a controller, a drive unit, and a cooler. The drive unit includes a plurality of drive terminals, each of which is connected to a cooler. During the working process of the transformer cooling control cabinet, the controller outputs the controller signal corresponding to the current temperature of the transformer to the drive unit, so that the drive unit drives the corresponding combination of coolers to input, so as to achieve the purpose of controlling the cooling of the transformer.

However, due to the large number of drive ends of the drive unit and the same type of cooler used, it is easy to confuse the corresponding relationship between the cooler and the drive end of the drive unit during production, and the cooling control of the control transformer fails. That is, the existing transformer cooling control cabinet has poor reliability.

Contents of the invention

The technical problem to be solved by the present invention is to provide a wiring detection method of the transformer cooling control cabinet and the transformer cooling control cabinet, so as to improve the reliability of the transformer cooling control cabinet.

In order to solve the above technical problems, the present invention provides a wiring detection method for a transformer cooling control cabinet, the transformer cooling control cabinet includes a drive unit with N drive terminals, and a cooler connected to the N drive terminals in one-to-one correspondence , said N is an integer greater than or equal to 2; wherein said method comprises the following steps:

S1. Select any one of the N driving terminals as the target driving terminal, and input a wiring test power supply to it;

S2. Detect driving voltages of the N coolers;

S3. Detect the coolers connected to the target driving end according to the driving voltages of the N coolers, and repeat steps S1-S3 for N-1 times until the coolers connected to the N driving ends are detected.

Preferably, the detection of the coolers connected to the target driving end according to the driving voltages of the N coolers specifically includes:

S31. Comparing the driving voltages of the N coolers;

S32. Determine the cooler corresponding to the maximum driving voltage among the N driving voltages as the cooler connected to the target driving terminal.

Preferably, steps S1-S3 are repeatedly executed N times, and after repeating steps S1-S3 N times, it also includes:

S33. Obtain the maximum driving voltages of the N coolers detected when each of the driving terminals is used as the target driving terminal;

S34. Determine maximum and minimum values from each of the maximum driving voltages;

S35. Calculate the difference between the maximum and minimum values;

S36. When the difference is less than or equal to the first preset voltage threshold, it is determined that the connections between the drive terminals of the drive unit and the cooler are normal.

Preferably, after the step S35, it also includes:

S38. When the difference is greater than the first preset voltage threshold, determine that the connection between each drive terminal of the drive unit and the cooler is abnormal.

Preferably, after the step S36, it also includes:

S37. Output an enable signal to the enable terminal of the controller in the transformer cooling control cabinet, so as to start the transformer cooling control cabinet.

Correspondingly, the present invention also provides a transformer cooling control cabinet, including a drive unit with N drive terminals, a cooler connected to the N drive terminals in one-to-one correspondence, a processor, a memory, and stored in the memory The wiring detection program of the transformer cooling control cabinet, when the wiring detection program of the transformer cooling control cabinet is executed by the processor, the above-mentioned wiring detection method of the transformer cooling control cabinet is realized.

Preferably, the transformer cooling control cabinet further includes a cabinet body, and the drive unit, the cooler, the processor and the memory are all arranged in the cabinet body.

The beneficial effect of the embodiment of the present invention is that: since the present invention can accurately detect the coolers connected to the N driving ends, the transformer cooling control cabinet starts to work after detecting the coolers connected to the N driving ends, so , In the working process of the transformer cooling control cabinet, there will be no problem that the driving end of the drive unit does not correspond to the cooler, and the reliability of the transformer cooling control cabinet is higher.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic flow chart of an embodiment of the wiring detection method of the transformer cooling control cabinet of the present invention;

2 is a schematic flow diagram of another embodiment of the wiring detection method of the transformer cooling control cabinet of the present invention;

Fig. 3 is a schematic diagram of functional modules of an embodiment of the transformer cooling control cabinet of the present invention.

Detailed ways

The following descriptions of various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention can be implemented.

The invention proposes a wiring detection method for a transformer cooling control cabinet, wherein the transformer cooling control cabinet has a driving unit including N driving terminals, and a cooler connected to the N driving terminals in one-to-one correspondence. Here, N is an integer greater than or equal to 2, such as 3, 4, 100, etc., and its specific size is not limited here.

Please refer to FIG. 1. In one embodiment, the wiring detection method of the transformer cooling control cabinet includes the following steps:

S1. Select any one of the N driving terminals as the target driving terminal, and input a wiring test power supply to it;

S2. Detect driving voltages of the N coolers;

S3. Detect the coolers connected to the target driving end according to the driving voltages of the N coolers, and repeat steps S1-S3 for N-1 times until the coolers connected to the N driving ends are detected.

In this embodiment, one of the N driving terminals may be selected as the target driving terminal according to a preset sequence, or one of the N driving terminals may be randomly selected as the target driving terminal. For example, according to the positional relationship of the driving ends, follow the order from left to right; or, number the driving ends, randomly select one of the N driving ends as the target driving end according to the number of the driving ends.

The wiring test power supply can be a voltage source or a current source, and its value is not limited here. For the convenience of testing, the value of the wiring test power supply is preferably 3.3V or 5V, which is not only easy to obtain from the market, but also convenient for detection. Here, a voltmeter can be directly used to detect the driving voltage of the cooler. It can be understood that the accuracy of the selected voltmeter can be determined according to the voltage of the wiring test power supply. Generally, the lower the voltage of the wiring test power supply, the higher the accuracy of the voltmeter is required.

Please refer to FIG. 2. In one embodiment, the following steps can be used to detect the coolers connected to the target drive terminal according to the driving voltages of N coolers:

S31. Comparing the driving voltages of the N coolers;

S32. Determine the cooler corresponding to the maximum driving voltage among the N driving voltages as the cooler connected to the target driving terminal.

It can be understood that during the detection process, only the target drive terminal has a wiring test power input, so theoretically, only the cooler connected to the target drive terminal has a drive voltage value, and the drive voltage of other coolers should be zero. Therefore, in this embodiment, the cooler corresponding to the maximum driving voltage among the determined N driving voltages is the cooler connected to the target driving terminal, and it can be accurately judged whether the wiring between each driving terminal of the driving unit and the cooler is normal.

Therefore, by repeating the above steps S1-S3 for N-1 times, the coolers corresponding to the N-1 driving terminals can be detected. Generally, the Nth terminal should be connected to the Nth cooler.

In order to enhance the detection result, in an embodiment, the above steps S1-S3 are repeated N times.

Further, after repeating steps S1-S3 for N times, it also includes:

S33. Obtain the maximum driving voltages of the N coolers detected when each of the driving terminals is used as the target driving terminal;

S34. Determine maximum and minimum values from each of the maximum driving voltages;

S35. Calculate the difference between the maximum and minimum values;

S36. When the difference is less than or equal to the first preset voltage threshold, it is determined that the connections between the drive terminals of the drive unit and the cooler are normal.

It can be understood that, after detecting the one-to-one correspondence between each driving end of the driving unit and the cooler, there may still be a problem of poor contact between the driving end of the driving unit and the cooler. When the driving end of the drive unit is not in good contact with the cooler, it will also affect the cooling control effect of the transformer cooling control cabinet on the transformer.

Generally, when the target driving terminal of the driving unit is not in good contact with the cooler, the driving voltage of the cooler corresponding to the faulty target driving terminal is usually smaller than that corresponding to the normal target driving terminal. Therefore, the technical solution can detect whether there is a bad connection between each drive end of the drive unit and the cooler, thereby further enhancing the reliability of the transformer cooling control cabinet.

It is worth mentioning that, after the above step S35, it also includes:

S38. When the difference is greater than the first preset voltage threshold, determine that the connection between each drive terminal of the drive unit and the cooler is abnormal.

In addition, after the above step S36, it also includes:

S37. Output an enable signal to the enable terminal of the controller in the transformer cooling control cabinet, so as to start the transformer cooling control cabinet.

In the technical solution of the present invention: firstly, select any one of the N driving terminals as the target driving terminal, and input a wiring test power supply to it; then, detect the driving voltages of the N coolers; then, according to The driving voltages of the N coolers detect the coolers connected to the target drive terminals; finally, repeat the above steps for N-1 times until the coolers connected to the N drive terminals are detected. Since this technical solution can accurately detect the coolers connected to the N driving ends, the transformer cooling control cabinet starts to work after detecting the coolers connected to the N driving ends. Therefore, in the working process of the transformer cooling control cabinet In this case, there will be no problem that the driving end of the drive unit does not correspond to the cooler, and the reliability of the transformer cooling control cabinet is higher.

Correspondingly, referring to FIG. 2, the present invention also proposes a transformer cooling control cabinet, including a drive unit with N drive terminals, a cooler connected to the N drive terminals one by one, a processor, a memory, and a The wiring detection program of the transformer cooling control cabinet in the memory, when the wiring detection program of the transformer cooling control cabinet is executed by the processor, the above wiring detection method of the transformer cooling control cabinet is realized.

Wherein, the transformer cooling control cabinet also includes a cabinet body, and the drive unit, cooler, processor and memory are all arranged in the cabinet body.

From the above description, it can be seen that the beneficial effect of the embodiment of the present invention lies in that: since the present invention can accurately detect the coolers connected to the N driving ends, the transformer cooling control cabinet can detect the coolers connected to the N driving ends. Therefore, during the working process of the transformer cooling control cabinet, there will be no problem that the driving end of the drive unit does not correspond to the cooler, and the reliability of the transformer cooling control cabinet is higher.

The above disclosures are only preferred embodiments of the present invention, and certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (7)

1. a kind of Wiring detection method of transformer Cooling switch board, which is characterized in that the transformer Cooling switch board includes Driving unit with N number of driving end and with N number of cooler for connecting one to one of the driving end, the N to be more than or Person is equal to 2 integer；It the described method comprises the following steps：

S1, N number of any one driving end for driving end is chosen as target drives end, and electric to the test of its input wires Source；

The driving voltage of S2, the N number of cooler of detection；

S3, the cooler being connect with target drives end is detected according to the driving voltage of N number of cooler, repeats N-1 Secondary step S1-S3, until detecting the cooler being connect with N number of driving end.

2. Wiring detection method as described in claim 1, which is characterized in that the driving electricity according to N number of cooler Pressure detects to specifically include with the cooler that target drives end is connect：

S31, the driving voltage of N number of cooler is compared；

S32, cooler corresponding to maximum drive voltage in N number of driving voltage is determined, to be connect with target drives end Cooler.

3. Wiring detection method as claimed in claim 2, which is characterized in that repeat n times step S1-S3, the repetition N times step S1-S3 is performed to further include later：

When S33, each driving end of acquisition are as target drives end, the maximum drive electricity of the N number of cooler detected Pressure；

S34, maximum and minimum value is determined from each maximum drive voltage；

S35, the difference for calculating the maximum and minimum value；

S36, when the difference is less than or equal to the first predetermined voltage threshold, determine each driving end of the driving unit with The wiring of the cooler is normal.

4. Wiring detection method as claimed in claim 3, which is characterized in that further included after the step S35：

S38, when the difference is more than the first predetermined voltage threshold, determine each driving end of the driving unit and the cooling The wiring of device is abnormal.

5. Wiring detection method as claimed in claim 3, which is characterized in that further included after the step S36：

S37, the Enable Pin for outputing enable signal to controller in transformer Cooling switch board, so that transformer Cooling switch board opens It is dynamic.

6. a kind of transformer Cooling switch board, which is characterized in that including the driving unit with N number of driving end and N number of drive Cooler, processor, memory and the transformer Cooling control being stored in the memory that moved end connects one to one The wiring detection program of cabinet when the wiring detection program of the transformer Cooling switch board is performed by the processor, is realized The Wiring detection method of transformer Cooling switch board as described in claim 1-5 any one.

7. transformer Cooling switch board as claimed in claim 6, which is characterized in that the transformer Cooling switch board further includes Cabinet, the driving unit, the cooler, the processor and the memory are set in the cabinet.