KR19980084286A - Automatic voltage regulator for peripheral transformers in transmission and substation facilities - Google Patents

Abstract

The present invention relates to a secondary automatic voltage regulating device for the peripheral voltage of the transmission and substation facility, which is conventionally controlled by a continuous control pulse and a condition in which the rising or falling control signal is generated by the voltage regulator and the measured voltage is preset. In the present invention, it is a problem that many necessary situations are excluded in the actual use or the principle adjusted by the control pulse at every shift, and according to the present invention, the transformer ratio of the transformer is changed according to the load variation of the secondary line of the power system. By providing a voltage regulator for the peripheral voltage of transmission and substation equipment by expanding the function of the voltage regulator and adding a number of convenience functions, the user's convenience is further improved compared to the prior art, and the elimination of the dependence on imports is eliminated. Parts can be easily replaced and repaired, and communication function with SCADA Introduced is the ability to add another function required for the automated / unmanned of future transmission and transformation facility protection by invention.

Description

Automatic voltage regulator for peripheral transformers in transmission and substation facilities

The present invention relates to an automatic voltage regulating device for a peripheral voltage transformer of a transmission / transmission facility. In particular, the present invention relates to a control circuit in a load state with a tap winding and a ULTC for changing a transformer ratio of a transformer according to a load variation of a secondary line of a power system. The present invention relates to an automatic voltage regulator for peripheral transformers of transmission and substation equipment that operates a motor drive connected to a tap-changer.

In the conventional case, the power supplier changed the transformer ratio and caused a uniform voltage when the load fluctuation of the secondary line of the peripheral voltage occurred.

To this end, various types of devices have been introduced. Among them, the step-by-step structure of motor drive control is generalized, which is controlled by a continuous control pulse, and the rising and falling control signals are generated and measured by the voltage regulator. It is a principle that is operated by giving control pulse to the motor driving unit whenever the voltage is out of preset condition.

In addition, the drop voltage generated between a single Peter-Line between the transformer and the load can be compensated by increasing the desired value by compensating for the resistance drop.

However, existing devices do not have much of the new need under the current operating environment.

For example, if the status of the device could not be displayed, the user convenience functions such as the self-diagnosis function and the communication between the systems could not be found.

Accordingly, the present invention relates to an automatic voltage regulating device for the peripheral transformer of the transmission and substation equipment drawn out in view of the above-mentioned problems of the prior art, and in particular, the transformer ratio of the transformer is changed according to the load variation of the secondary line of the power system. The purpose of the present invention is to provide an automatic voltage regulator for peripheral transformers of transmission and substation equipment by expanding the functions of voltage regulators and adding a number of convenience functions.

Hereinafter, with reference to the accompanying drawings will be described in detail the technical configuration and effect for achieving the object of the present invention.

1 is a schematic block diagram of a circuit configuration of the present invention.

2 is an external perspective view of the product of the present invention

* Description of the symbols for the main parts of the drawings *

10: control unit 11: key pad unit

12: communication module 13: optical insulation

20: display unit 21: relay drive unit

40: voltage change section 50: A / D conversion section

A: Adjustment knob B: Adjustment selector

C: Status Display

1 is a schematic block diagram of the present invention, wherein reference numeral 10 denotes a control unit that performs a control operation throughout the apparatus, 11 denotes a keypad unit, and 12 denotes a communication connection for communication between systems. Module 13 is an optical insulator for converting an electric output by an optical element, thereby driving an electric circuit of the other axis, 20 is a display unit, 30 is a relay driver, 40 is a converter for converting AC voltage to DC, 50 is continuous The analog signal is referred to as a digital converter and is composed of a combination of these.

2 is a view showing the appearance of the present invention, A is an adjustment knob, B is an adjustment selector, 20 is a display unit consisting of a liquid crystal panel for displaying numbers and letters, and C is a state for displaying the state of the device by LED lighting. The display portion 11 refers to the keypad portion.

Referring to the operation and effect of the present invention configured as described above based on the embodiment as follows.

As shown in Figure 1 in the actual use of the present invention because the display of the various states through the LED lights of the large-capacity liquid crystal panel 20 and the status display unit (C) can easily determine the state of the device, and facilitates after-sales service This is its advantage.

In addition, this device is a digital type, and the control operation is performed while the LED is turned on at the time of device control, and the error is within ± 0.1% of the precision at the time of control.

Looking at the representative operation state here, it is possible to monitor various data and set values by the multi-drop of the communication module 12 in the SCADA system and to remotely control the various function values currently in operation.

On the other hand, the self-diagnosis function is to display the various states of the device, for example, through the display 20 as a number and letters to display an error when malfunctioning and to display the main factor (FACTOR) and real-time value This will indicate various functional status LEDs located on the front of the device: reverse integrator / timer 1,2 / under, overvoltage / under, overcurrent / communication and monitoring / system malfunction.

In addition, the keypad 11 can select various factors and setting values, and the LCD display device has 20 × 4 lines so that the main functions can be identified in detail, and the adjustment selector B has a communication function. And display and output of system errors, password and watchdog functions.

As described above, the present invention relates to an automatic voltage regulator of a transmission / transmission facility line. The introduction of a Man-Machine Interface (MMI) function further improves the user's convenience compared to the prior art, and also relies on imports. By eliminating the damage, the acquisition period can be shortened by 3 ~ 4 months, so that it can immediately respond to the urgent installation demand of the consumer, and can also immediately replace and repair, and add another function suitable for domestic facilities by S / W. It is a useful invention.

Claims (1)

In the implementation of the automatic voltage regulating device for the peripheral voltage of the transmission and substation facility, the control unit 10 performs a control operation throughout the device, and includes a keypad 11 including a plurality of keys for selecting various function coefficients and setting values. The communication module 12 for the communication connection between the system and the system, and converts the electrical output by the optical element, thereby connecting the optical insulator 13 for driving the electrical circuit of the other side to one side of the control unit 10, Display 20 for displaying the operating state of the number or letters, and the relay driver 30 having a function of connecting each power source to operate each driver according to the selected function and the converter 40 for converting AC voltage to DC voltage ) And a converter (50) for converting a continuous analog signal into encoded digital, by connecting the control unit (10) in electrical combination. Transformer automatic voltage regulating unit.