KR100764835B1 - Apparatus for auto equality and alternatively controling for a system comprised of main and auxiliary units - Google Patents

Abstract

An auto equality and alternately controlling apparatus for an equipment composed of main and auxiliary units is provided to improve an eccentric driving method of the equipment composed of the main and auxiliary units into an auto equality driving method. An auto equality and alternately controlling apparatus for equipment composed of main and auxiliary units includes an integrating timer(T1,T2), an alternate rachet relay, and an auxiliary relay. The integrating timer(T1,T2) integrates the driving time of the main unit which currently drives and generates an output signal which automatically drives the auxiliary unit when a predetermined time passes. The alternate rachet relay converts the currently driving main unit to the auxiliary unit by being controlled based on the output signal which is generated from the integrating timer(T1,T2). The auxiliary relay remembers the output signal which is generated from the integrating timer(T1,T2), and prevents the currently driving unit from being sudden stopped by transmitting an alternate order according to the output signal to the alternate rachet relay after the stroke of the currently driving unit is finished.

Description

   BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic alternating-current alternating-current alternating-current alternating-current alternating-current alternating-current alternating-current alternating-current alternating-current alternating-current alternating-

      1 is a schematic view showing an operation air compressor (AIR) of a general substation opening and closing apparatus (GIS)

COMPRESSOR).

      FIG. 2 is a conventional electric circuit diagram showing an operation device of a substation switching and shutting device (GIS) air compressor. FIG.

      3 is a schematic electrical circuit diagram showing an automatic equalizer alternating circuit of a substation switching and shutting device (GIS) air compressor according to an embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of a basic automatic equal alternation circuit of two series (main unit and spare unit) according to an embodiment of the present invention; FIG.

FIG. 5 is a view showing a configuration of an automatic equalizing circuit of an air compressor according to an embodiment of the present invention; FIG.

FIG. 6 is an electrical circuit diagram showing the configuration of an automatic equal alternating circuit of a transformer cooler according to an embodiment of the present invention; FIG.

FIG. 7 is a time chart showing an operation sequence according to a virtual condition in an automatic operation of an air compressor (air compressor) alternating circuit according to an exemplary embodiment of the present invention; FIG.

FIG. 8 is a time chart showing a sequence of operations based on virtual conditions during automatic operation of the alternate alternating circuit of the transformer cooler according to an embodiment of the present invention. FIG.

The present invention relates to a mechanical system including a transmission system composed of two series (primary and reserve) apparatuses as in the case of an air compressor of an ordinary power transformer cooling facility, a gape and a shutoff apparatus (GIS) More precisely, not only automatically alternating two groups of devices according to temperature or pressure settings, but also automatically switching between two groups (primary and secondary) based on the operating time setting by the integration timer. (Preliminary) By automatically alternating the operating times of the devices so as to be even, the causes of device failure due to mechanical wear and tear due to conventional biased operation are greatly reduced so that the life of the device is extended and reliability is improved. The present invention relates to a method and an apparatus for automatic equal alternation of a facility constituted by apparatuses.

Generally, a power transformer is used as a main transformer that receives power transmitted from a power plant and a power plant that generate power and supplies the power to buildings such as substation, factory, and home. Generally, the main transformer or substation cooler or circuit breaker is installed as a stand-by device for safety and malfunction. For example, as shown in Figure 1, there are two compressors for providing compressed air to the GIS of the substation. This is in order to allow the operation of the entire facility to continue using the compressor of the reserve device even if a repair of the main compressor is performed due to a problem. As described above, in the facility in which the main apparatus (main apparatus, first group apparatus) and the auxiliary apparatus (reserve apparatus, second group apparatus) are installed, there is a problem that the operation of the master key and the operation of the reserve apparatus are switched between the main apparatus and the reserve apparatus Occurs.

Conventionally, only the main group is continuously operated, and the spare group is operated by the occasionally operated control method. The main and reserve units are switched by the maintenance personnel for one week, one month, one quarter And the like are periodically exchanged by hand. In such a case, the master gear is in a state of operation for a longer period of time than the master gear and the master gear's components are aged more quickly due to the biased operation of the master gear, for example aging of parts such as the motor drive shaft and / The possibility of occurrence of abnormality such as shortening the life span of the apparatus is increased.

Therefore, in a conventional system composed of two systems, such as a cooling apparatus of a substation transformer or an air compressor for operating an on-off and shut-off device, the operation of the main apparatus and the standby apparatus can be automatically alternated There has been a demand for a technique that can extend the lifetime of the device and improve the reliability by making it possible to alternate to operate automatically evenly.

It is an object of the present invention to improve a bi-directional operation mode of a system composed of two series of a main unit and a standby unit as an air compressor for a conventional cooling unit of a substation transformer, It is intended to provide an automatic equal alternating switching device of a facility consisting of a new two-series (main and standby) device with additional advantages.

It is a particular object of the present invention to provide a method and apparatus for automatically switching alternating between two groups of apparatuses according to the operational integration time of a transformer to reduce the risk of failure due to mechanical wear or burn- (Main and auxiliary) apparatuses so as to greatly reduce the number of units of the apparatuses.

This object is provided by a method and apparatus for automatic equal alternation of a facility consisting of two series (main and auxiliary) equipment provided according to the present invention. According to one aspect of the present invention, there is provided an apparatus for alternating one series (main) apparatus and another series (auxiliary) apparatus according to a specific condition, including two series (main and auxiliary) NOTE: It may include an integration timer to automatically start another sequence (reserve) device after a predetermined time elapses by integrating the operating time of the device. Accordingly, the operation time of one series (main) apparatus and the operation time of another series (auxiliary) apparatus can be determined by accumulation by the integration timer, and in accordance with the determination of the accumulation timer, (Preliminary) operation can be switched to the operation of the apparatus or vice versa. Therefore, according to the present invention, there is a remarkable effect that the operation time of the two-system (main and spare) apparatus becomes equal.

In a preferred embodiment, it is a cooling device for use in a power transformer, including a mains and reserve device, or a compressor for providing compressed air.

In a preferred embodiment, the specific conditions for the alternation may further include at least one of temperature or pressure conditions.

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

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram showing an operating air compressor schematic of a two-line substation switching and shutting device (GIS) in general. Numerals referred to in the drawings include (1) air compressors, (2) check valves, (3) automatic exhaust valves, (4) stop valves, (5) air reservoirs, (6) safety valves, Pressure switch for high pressure alarm, (13) pressure switch for low pressure alarm, (14) high pressure side pressure gauge, (15) pressure switch for low pressure alarm, Exhaust valve, (16) air filter, (17) pressure reducing valve, (18) low pressure side pressure gauge, (19) safety valve (20) stop valve, (21) internal cooler, (24,25) stop valve, (26) dehumidifier, (27) filter, (28) air cylinder and the like.

In the illustrated example, the compressed air is structured such that the master in the air compressor AIR COMPRESSOR, that is, the first compressor COMP (NO.1) and the reserve device, that is, the second compressor COMP (N) .2) are manually switched. The inventors have found that this is due to the fact that the operating times of the first compressor and the second compressor in the compressor AIR COMPRESSOR are different from each other. That is, in the case of a practical operation at a specific substation, the first compressor operates for about 7 hours and 27 minutes and the second compressor operates for about 5 hours and 29 minutes in the case of 345 kV GIS, About 1 hour 58 minutes. In the case of this substation, the cycle of interchanging the first compressor and the second compressor to the master or standby device was one month. In this case, it is easy to see that the first compressor, which is a main unit, operates for about 16 hours for one month, and that a larger load is applied to the component machine of the first compressor due to such bi-driven operation.

FIG. 2 is a view showing an example of a manual pre-automatic automatic operation condition change-over circuit of a compressor for generating compressed air of a conventional substation opening and closing circuit breaker constructed as shown in FIG. The circuit configuration shown is an example of Hyosung GIS. In the drawing, RL1 and RL2 are compressor operation indicating lamps, and 63A1 is a primary pressure drop detection sensor which is turned ON at a set pressure (28 kg / cm2) and OFF at an upper pressure (30 kg / It turns on at the set pressure (27㎏ / ㎠) as the secondary pressure drop sensor and turns off at the upper pressure (29㎏ / ㎠) based on the deviation. CS1 and CS2 are manual control switches that manually turn ON / OFF the control circuit. 43A is a switch for selecting and switching the # 1 preceding automatic operation, the manual operation, and the # 2 preceding automatic operation. 88A1 and 88A2 are relays for starting the electric motors M1 and M2. 49A1 and 49A2 indicate thermal thermal electricity, which is operated when the motor is overloaded. Operation during manual operation and NO1 preceding automatic operation of the illustrated circuit configuration will be described as follows. When the first compressor (# 1 compressor) is operated during manual operation, 43A is manually selected. When CS1 is turned on, the first compressor motor M1 is started. When CS1 is OFF, the first compressor motor M1 is stopped. When the second compressor (# 2 compressor) is operated, 43A is manually selected, and when the CS2 is turned on, the second compressor motor M2 is started and stopped when CS2 is OFF. In other words, the operation type changeover switch is switched to the "manual" position during manual operation and the motor is started according to whether the control switch CS is ON. That is, when CS1 is ON, the first compressor is operated, and when CS2 is ON, the second compressor is operated.

At the time of automatic operation, 43A is selected as No1 automatic operation, and when the 63A1 pressure value is lower than the reference value, the electric motor M1 of the first compressor is started. Thereafter, the first compressor motor M1 is started and stopped repeatedly in accordance with the variation of the pressure value of 63A1, and when the pressure is equal to or lower than the reference value 63A2, the second compressor motor M2 is also started at the same time.

When the 43A is manually switched to the No. 2 preceding automatic running condition, the second compressor electric motor M2 starts to operate under the same condition as the 63A1, and when the 63A2 pressure decreases, the first compressor electric motor M1 starts to operate. Turns OFF sequentially.

As pointed out above, such a conventional on-site manual switching method of the opening and shutting device operating compressors (main and spare units) has a problem in that the switching operation is inconvenient. That is, there is a possibility that the operating switch for switching the compressor is inoperable due to the shift of the switching cycle of the driver, etc. As mentioned above, the operating time between the main compressor and the preliminary compressor is considerably different, For example, for a few months or several years, there is a problem that the possibility of failure due to deterioration or the like is increased in the case of a relatively long-time operation compressor motor, and the life is shortened.

As described above, in order to solve the problem in the uneven operation time of the conventional main device and the standby device, the present invention applies a temporal digital timer, as shown in FIGS. 3 to 8 and described below, A changeover operation circuit is improved to provide an automatic alternating circuit in which the operation times of the two series (main and standby) devices are equalized.

FIG. 3 is a view showing an equivalent alternating circuit of a compressor for generating compressed air for a circuit breaker of a substation transformer according to an embodiment of the present invention. FIG. 4 is a circuit diagram of a basic automatic equal- Fig.

3, RL1 and RL2 are compressor operation indicating lamps, and 63A1 and 63A2 represent pressure contact points. CS1 and CS2 are switches for turning on / off 88A1 and 88A2 when the compressor is in manual operation, and 43MA is a changeover switch for switching between manual (manual) and automatic (Auto). The parts referred to as 83 are (alternate) ratchet relays which automatically switch the preceding operation compressors by the setting of the integrating relays T1 and T2. 88A1 and 88A2 are relays for starting the motors (M1, M2), and 49A1 and 49A2 are thermal-induced electricity and operate when the motor is overloaded. T1 and T2 are the compressor operation time integration timers, T1 is the operation time integration timer for the # 1 compressor, and T2 is for the # 2 compressor. In addition, R1 (AUX REALY) memorizes the output signal of the integration timer for 83 relay alternate time control, and gives an alternate command after the end of operation. T3 (TIMER) prevent.

The operation of the circuit configuration of the present invention during manual operation and automatic operation will be described as follows. (# 1 compressor) electric motor M1 is started and CS2 is turned ON when CSAM1 is turned on while 43AM is being selected manually in the manual operation, and the second compressor (# 2 compressor) The electric motor M2 is started. In other words, the operation type changeover switch is switched to the "manual" position during manual operation and the motor is started according to whether the control switch CS is ON. That is, when CS1 is ON, the first compressor is operated, and when CS2 is ON, the second compressor is operated. In the automatic operation characteristic in the present invention, when the pressure value of 63A1 is lower than the reference value, it is closed and the electric motor M1 of the first compressor is started. When the preceding operation compressor automatic transfer cycle is 7 hours, CS2 is turned on. After # 1 compressor is operated for 7 hours, 83A (latch relay) is operated, and # 2 compressor is automatically switched to start. Here, the preceding operation compressor refers to a compressor that operates first among the two compressors in order to replenish the pressure when the primary pressure of the air tank drops. For example, when the pressure drop is small at 30 (± 0.2) kg / cm 2 to 27 (± 0.2) kg / cm 2, only the compressor selected in the preceding operation operates, Cm < 2 >, the trailing operation compressor is operated after the operation of the preceding operation compressor. If any one of the compressors has an output signal of the integration timer T1 or T2, the motor is switched instantaneously during the operation, so that the output signal is stored by the R1 relay to prevent mechanical stress. Prepare for driving.

FIG. 4 is a view showing a configuration of an alternating-pressure circuit of a compressor for generating compressed air according to an embodiment of the present invention, which will be well understood with reference to FIG. 3. Similarly, FIG. Fig. 3 is a diagram showing a configuration of an automatic equal-ratio alternating circuit of a transformer cooler according to a first embodiment of the present invention.

FIG. 6 is a time chart showing automatic operation of the automatic equal-ratio alternating circuit of the compressor for generating compressed air according to an embodiment of the present invention, having a circuit configuration as shown in FIG. In the figure, an example of automatic alternation after integration for 7 hours is shown for convenience. The function of the relay is as follows. 63A1, for example the pressure is closed at 28Kg / cm ² or less will take place at 30Kg / cm ² or more (operation alternately directed group) 63A2 is closed at a pressure of 27Kg / cm ² or less will take place at 29Kg / cm ² or higher (for the associated operation) 1TA and 1TB is alternately waiting for R1 relay with 7-hour set value integrated by using the power failure compensation function. R1 alternates 83 when one run is terminated by 63A1. The 49A1X and 49A2X operate as the OVER LOAD auxiliary relay and start the other group of compressors. TX inhibits the self-holding contact element to prevent the 83RY operation.

FIG. 7 is a time chart showing an automatic operation of an automatic equal-alternative circuit of a transformer cooler according to an embodiment of the present invention, having a circuit configuration as shown in FIG. In the figure, an example of automatic alternation after integration for 7 hours is shown for convenience. The function of the relay is as follows. 63A1 is held at 30Kg / cm ² or more is closed and at a pressure of 28Kg / cm ² or less (alternatively indicated group operation) 63A2 is closed at a pressure of 27Kg / cm ² or less it will take place at 29Kg / cm ² or higher (for the associated operation) 1TA and 1TB Uses the power failure compensation function and waits alternately with the R1 relay at the set value of 7 hours accumulated. R1 alternates 83 when one run is terminated by 63A1. 49A1X and 49A2X operate the other group of compressors when they operate as OVER LOARD auxiliary relays. TX inhibits self-holding contact OPEN to prevent 83RY operation.

As described above, the present invention extends the service life and reliability of the apparatus by distributing the equal operation time to the mechanical equipment including the power equipment including the master unit (# 1 GROUP) and the reserve unit (# 2 GROUP).

The apparatus of the present invention is characterized in that first, two groups are alternately operated by an alternate relay by an alternate-time control command of the apparatus by an integration timer having an electrostatic charge compensation function. Second, for example, when the time for driving the # 1 group and the time for driving the # 2 group are respectively integrated and the output is made at a set time, it is most likely that the vehicle is continuously running. In this case, if the motor momentarily stops and starts, Therefore, it shall be changed after the proceeding administration is over. Thirdly, in order to prevent the operation of the alternating relay unit in operation of the second state, the self-sustaining circuit element is delayed by giving a time of, for example, about 0.5 sec. Fourth, if the GROUP in operation stops due to overload and some fault, it will start up the group of the group that is in the idle state. Sixth, during the 1GROUP start-up operation by the first signal, if the second-stage signal comes, the idle unit also operates together.

The integration timer used in the present invention is the most important part for applying an equal operating time between two series (main and standby) devices. The integration timer stores the operation time up to the present time even if the apparatus in operation is stopped before the set time, and uses the function to be integrated in the next operation. It is preferable that the time setting range of the integration timer is set to a long time from 1 second to 9999 hours. When the set time is reached, the output of the integration timer is output in 0.05 to 5 sec by E mode, then it is reset to zero (0) and it goes to the setting value again. (Up to 16 hours, 39 minutes and 54 seconds), output mode FNCRKPQS mode C mode (up to 16 hours, 39 minutes and 54 seconds) during addition / subtraction during addition / (The automatic reset is repeated after output at the set value or more).

The apparatus according to the present invention in particular uses an alternating relay and the advantage of using an alternating relay is that it can be configured with a very simple circuit in comparison with the function and performance of the circuit by appropriately controlling the alternating-point control.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that many modifications and variations can be made in the present invention without departing from the spirit and scope of the present invention as defined by the appended claims. It should be interpreted by the claims that follow.

As described above, according to the present invention, the bi-directional operation mode of the two-system facility, such as the conventional cooling system of the substation transformer or the air compressor for generating the compressed air of the breaker, It is possible to provide an automatic equal alternation method and apparatus for a facility consisting of a new two-series (main and auxiliary) apparatus,

The present invention also provides a system and method for automatically actuating two groups of devices in accordance with the temperature of a transformer and the operating time of an air compressor to compensate for mechanical wear and tear It is possible to provide an automatic equal alternation switching method and apparatus of a system composed of two series (main and standby) apparatuses in order to greatly reduce the cause of failures due to burnout.

Claims (3)

(Main and reserve) apparatuses of the same configuration and which alternate the operation of the above-mentioned series (main) apparatus and other series (standby) apparatuses according to specific conditions, An integration timer for generating an output signal for automatically starting another sequence (spare) device after a predetermined time elapses by integrating the operation time of the currently operating one (main) device, An alternate ratchet relay for controlling the operation of the one (main) device currently operating and the operation of another sequence (standby) device, which is adjusted based on the output signal generated by the integration timers T1 and T2, The output signal generated by the integration timer is stored and an alternate command based on the output signal is transmitted to the alternate ratchet relay 83 after the current running of the device currently in operation is terminated, To prevent the sudden occurrence of the operation stop of the auxiliary relay (Main and reserve) apparatuses, characterized in that the apparatus comprises two series (main and auxiliary) apparatuses. The system according to claim 1, characterized in that the two-line (main and auxiliary) unit is a transformer cooling unit used in a substation facility or a compressor for providing compressed air. Equal alternating switching device. 2. The apparatus of claim 1, wherein the specific conditions for the alternation further include at least one of temperature or pressure conditions.

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