KR100716897B1 - Apparatus for switching of load - Google Patents

Abstract

This invention is equipped with two circuit breakers in one distribution line when supplying the distribution load by using the information of monitoring contact and low voltage detection relay. By using the instantaneous switching method that minimizes the time of failure, the power supply can be automatically and quickly recovered to prevent power failure and improve the power failure prevention and failure prevention. By using two breaker equipments, it is possible to monitor the main power supply interruption status of the main circuit breaker at all times, and in the event of a fault, the hobby breakers are synchronized with each other and change the power supply power stage of the load instantaneously. Power supply effectively by reducing the number of hours In order to supply high quality electricity without interruption, it is possible to supply power to the load by minimizing the time for resuming the load supply in case of power failure due to power supply problems by using two breakers, electrical circuit facilities. After that, the related fault equipment problem can be repaired by the conviction through diagnosis, to prevent breakdown and power failure, and to provide the power supply circuit breaker that can operate the power equipment efficiently by automation of operation and shortening of time. As for

First and second disconnectors having one end connected to two power supply (bus) sides to transmit power, and one terminal are connected to the other end of the first and second disconnectors, respectively, and the other terminals are connected to each other. First and second circuit breakers connected to transmit power, a third circuit breaker having one end connected to a connection point of the first and second breakers and the other end connected to a transmission and distribution line, and transmitting power; And a first low voltage detection relay connected to the (bus) side, respectively, and using the first low voltage detection relay as described above in case of a failure in the power supply (bus) side. It is characterized by supplying the load by checking each of the main power (bus) side of the two power supply (bus) side, and then injecting each disconnector and breaker in advance.

 Breaker, Transmission Line, Load

Description

Power distribution line load breaker {Apparatus for switching of load}

1 is a configuration diagram of a conventional power supply line load supply circuit breaker.

2 is a flowchart illustrating the operation of a conventional power supply line load supply circuit breaker.

3 is a block diagram of a load distribution circuit breaker of a transmission line according to an embodiment of the present invention.

4 is a flowchart illustrating a method of interrupting load supply of a transmission line according to an embodiment of the present invention.

5 (a), 5 (b) and 5 (c) are diagrams illustrating an operating state of a load distribution circuit breaker of a transmission line according to an embodiment of the present invention.

6 is a flowchart illustrating a specific operation of a method for interrupting load supply of a transmission line according to an embodiment of the present invention.

7 is an actual field application diagram of a load distribution circuit breaker of a transmission line according to an embodiment of the present invention.

8 is a block diagram of a circuit breaker control panel of a load supply circuit breaker according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

CB1, CB2: Breaker DS1, DS2, DS3: Disconnector

The present invention relates to the electric power field. More specifically, two breakers are installed in one distribution line when supplying a distribution load by obtaining information using a monitoring contact and a low voltage detection relay. By using the instantaneous switching method that minimizes the time of load interruption caused by the bus side fault to the momentary failure, it automatically recovers the power supply automatically and prevents misoperation, prevents the power failure and improves the ability to cope with troubles. Uninterruptible power can be aimed at by using two circuit breakers in the electric circuit, and the main circuit breaker's power supply interruption status can be monitored at any time. It is possible to reduce power failure time and spreading by changing the system It can effectively supply power without interruption by shortening the power supply and power failure time.In order to supply high quality electricity without interruption, two breakers which are electrical circuit facilities can be used for the time to resume the load supply in case of power failure due to power side problems. After supplying power to the load with minimum suppression, the related trouble equipment problem can be repaired by diagnosing the equipment, preventing breakdown and power failure, and operating efficient power equipment by automating operation and reducing time. The present invention relates to a load supply circuit breaker for a transmission line.

The operation of the power system is a very important part of the power supply. As a result, efforts have been made to stably manage the electric power system by additionally maintaining high reliability and providing reserve power. Failure to do so will provide widespread outages and the cause of more serious problems. Accordingly, the recovery of the uninterruptible power supply and load supply is a very important technical task, for which a circuit breaker (CB) is used.

In general, a breaker (CB) is an electrical device that is used as a tool for separating and connecting electrical circuits of electrical machine tools such as power plants, substations, and buildings. This is useful for blocking. Accordingly, the circuit breaker is used as one of the essential and important electrical equipments that are generally used in the electrical supply circuit equipment. When the power is supplied using the circuit breaker, the load is supplied and the circuit is changed, and when the line breaks, the circuit is re-closed to resume the load supply as soon as possible.

The circuit breaker performs power interruption and resumption of power when the load line bears its own load. However, the state of the circuit breaker is not monitored in the case of a no-voltage state or failure of the breaker power supply. This will be described in more detail with reference to the accompanying drawings.

1 and 2 illustrate the configuration and operation flow of the conventional transmission and distribution line load supply circuit breaker. Referring to FIGS. 1 and 2, the conventional transmission and distribution line load supply blocking process will be described below.

In the conventional power equipment operation, as shown in Fig. 1, a load supply is adopted by adopting a dual power supply configuration, that is, a double bus, which doubles the power supply side bus.

In order to supply the load to the transmission and distribution line, the facility operator inputs the disconnection unit (DS3) on the transmission and distribution line side (S12), and then selects the power supply (bus) side and selects the disconnector (DS1 or DS2) on the power supply (bus) side. After the input (S13), the breaker (CB) on the transmission and distribution line side is inputted and operated (S14) to normally supply power to the electric power customer (S15). The power is measured according to the supply of current flow to the power distribution line. ① Bus → ② Bus side disconnector (DS1 or DS2) → ③ Breaker (CB) → ④ Transmission line disconnection unit (DS3) → ⑤ Transmission distribution line → ⑥ Electricity is supplied through the same path as the customer.

The transmission and distribution line load supply breaker can be divided into the power supply side and the load side around the circuit breaker (CB), and the fault is also explained separately from the power supply side and the load side.

First, the operation of the breaker CB due to the failure of the load side, that is, the failure of the transmission line is as follows. In case of failure of the transmission line, the breaker CB performs a blocking operation, and in case of an instantaneous failure, the breaker CB performs a related operation such as a reclosing operation in conjunction with a protection relay (S16).

Next, when the power supply (bus) side breaks down, that is, when there is no voltage on the power supply (bus) side during the load operation, the breaker CB does not perform any interruption operation. Open the breaker (CB) and open the faulty power side breaker (for example DS1) in the dual power configuration, select the healthy power side and select the relevant power (bus) to input the breaker (for example DS2). The breaker CB is reloaded and the supply to the load is resumed (S17).

Accordingly, when the load supply is not possible due to the failure of the power supply (bus) side, the load supply is resumed by the following procedure. That is, ① ① Power supply (bus) side fault → ② Operator recognition → ③ Confirmation of healthy power among 2 power supply (bus) side → ④ Opening of breaker (CB) → ⑤ Opening of breaker of faulty power supply → ⑥ Input of breaker of sound power supply → ⑦ Breaker (CB) Proceed with re-input.

In this case, when only the disconnecting device is selected without opening the breaker CB, it is connected to the ripple failure due to an incorrect operation. This is due to the disconnector not having the performance and function of the breaker CB.

However, such a conventional dual power supply configuration has to be passive in the case of power failure and manual switching, and there is a limit in minimizing the power failure time even if a person skilled in facility operation performs a switching, and it is a human operation because it is a manual operation. An error (human error) is present and has problems such as an increase in power failure due to secondary spread.

That is, in the related art, the above-mentioned failure is not noticed beforehand, and it is not known when it will occur, and as the operator performs the operation by changing the supply system and switches the load in a manual way, When the bus is no voltage, the power failure time of the related distribution load becomes longer, and there are many distribution lines affected by the power failure (typically about 30 mw with 6 to 8 lines), which causes widespread blackout. There is this. That is, the time required for switching loads means power failure, and the longer the power failure, the more damage on the consumer side becomes significant.

In addition, conventionally, in the process of switching the load by the operator in a manual manner, there is a problem in that the problem of shutting off the power equipment operation immediately occurs when an operation error occurs.

An object of the present invention is to solve the conventional problems as described above, by installing two circuit breakers in one distribution line when supplying the distribution load by obtaining information using a monitoring contact and a low voltage detection relay to the other end Automatic closing of the power supply by using the instantaneous switching method that minimizes the time of the power failure due to the bus side fault by the automatic closing with the circuit breaker of the bus. In order to provide stable power supply and uninterruptible power supply, it is to provide a load supply circuit breaker for transmission and distribution line.

Another object of the present invention relates to a method for shortening a power failure time during an unscheduled power failure during power supply to a load. Specifically, two main circuit breaker power supply states of the main circuit breaker are used by using two circuit breaker facilities. It is possible to monitor all the time, and in case of failure, the rear breaker is mutually operated to reduce the power failure time and spread by changing the power supply of the load instantaneously, and effectively supply power by automating operation and reducing the power failure time. It is to provide load distribution circuit breaker of transmission line which can be made without interruption.

Another object of the present invention by using two circuit breakers that are electrical circuit equipment to supply high-quality electricity without interruption to minimize the time for resuming the load supply in the event of power failure due to power-side problems to minimize the supply of power to the load after In case of troubles related to the faulty equipment, it is possible to repair the equipment with certainty through diagnosis, to prevent trouble and reduce power outages, and to load-load the circuit breaker with transmission and distribution lines that can operate efficient power equipment by automating operation and reducing time. To provide.

Another object of the present invention is to provide a load distribution circuit breaker for a transmission and distribution line which allows an operator to have a margin after operation of the load and to operate it to its original position again or take appropriate measures.

It is another object of the present invention to provide a load distribution circuit breaker for a transmission and distribution line that can prevent transmission limitation by operating a facility so that there is no disturbance power of an electrical installation.

As a means for achieving the above object, the configuration of the present invention is the first and second disconnector having one end connected to each of the two power supply (bus lines) and transmitting power, and the first and second disconnector One terminal is connected to the other end and the other terminal is connected to each other, and the first and second breakers for transmitting power, and one end is connected to the connection point of the first and second breakers, and the other end is connected to the transmission and distribution line. This is done by including a third disconnector which is connected and transmits power.

The configuration of the present invention further includes first and second low voltage detection relays respectively connected to the power source (bus line) side, and the first case described above when a fault occurs in the power source (bus line) side. And after confirming the healthy power supply (bus) out of the two power supply (bus) sides using the second low voltage detection relay, it is preferable to supply the load by injecting each disconnector and the breaker in advance to the healthy power supply (bus) side.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings in order to describe in detail enough to enable those skilled in the art to easily carry out the present invention. . Other objects, features, and operational advantages, including the object, operation, and effect of the present invention will become more apparent from the description of the preferred embodiment.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred embodiment to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment Rather, various changes, additions, and changes are possible within the scope without departing from the spirit of the present invention, as well as other equivalent embodiments.

3 is a configuration diagram of a load distribution circuit breaker of a transmission line according to the first embodiment of the present invention. As shown in FIG. 3, a configuration of a load distribution circuit breaker according to a first embodiment of the present invention includes first and second disconnectors having one end connected to two power supply (bus) sides respectively. The first and second circuit breakers CB1 having one terminal connected to the other ends of the first and second disconnectors DS1 and DS2 and the other terminals connected to each other to transmit power. , CB2) and a third disconnector DS3 connected to one end of the first and second breakers CB1 and CB2 and the other end connected to the transmission and distribution line to transmit power, and the power source ( And first and second low voltage detection relays S201 and S202 connected to the bus bar side, respectively.

The operation of the load distribution circuit breaker according to the embodiment of the present invention according to the above-described configuration will be described with reference to the operation flowchart of FIG. 4.

In normal operation, it is supplied similarly to the conventional method.

First, in order to supply the load, the equipment operator inputs the disconnecting unit (DS3) on the transmission and distribution line side (S22), and then selects the power supply side, and then inputs the disconnecting units (DS1 and DS2) on the power supply (bus) side (S23). By inputting and operating the circuit breaker CB1 or CB2 of the transmission and distribution line (S24), electric power is supplied to the electric power customer (S25). That is, ① bus → ② selected power supply (bus) side disconnectors (DS1 and DS2) → ③ selected breaker (CB1 or CB2) → ④ transmission line disconnector (DS3) → ⑤ transmission distribution line → ⑥ electricity supply It is done.

In addition, when the transmission line breaks down, the breaker performs a blocking operation, and when the load line breaks, the breaker performs a related operation such as a reclosing operation in conjunction with a protection relay (S26).

In addition, when the load supply is impossible due to a failure of the power supply (bus) side, the load supply is restarted in the following procedure. That is, ① ① Power supply (bus) side failure → ② Acquisition of health power (bus) confirmation information from the two power supply (bus) sides → ③ Equipment operator recognition status → ④ Automatic opening of main supply breaker → ⑤ Automatic supply of breaker feeder → ⑥ Transmission and distribution line Resume the load supply → ⑦ proceeds in the order of recognition of all operators (S27).

Compared with the prior art configuration of Figs. 1 and 2, a low voltage detecting relay and a breaker should be further provided, and they are connected to the selective driving circuit configuration circuit so as to transmit information to the rear breaker operation and the remote monitor. .

5 (a), (b), (c) is a view showing the operating state of the transmission line load supply circuit breaker according to an embodiment of the present invention, Figure 6 is a transmission line load according to an embodiment of the present invention Detailed operation flowchart of the supply interruption method.

After inputting the circuit breaker (DS3) on the transmission and distribution line side (S32), and then selecting the power supply side and inserting the circuit breaker (DS1 and DS2) on the power supply (bus) side (S33), the circuit breaker (CB1) on the transmission and distribution line is inserted and operated. By doing so (S34), electric power is supplied to the electric power customer (S35). That is, as shown in Fig. 5 (a), ① bus bar → ② power supply (bus) side disconnector (DS1) → ③ selected circuit breaker (CB1) → ④ circuit breaker (DS3) → ⑤ power distribution line → ⑥ Electricity is supplied through the path of.

In addition, when the transmission line breaks down, the breaker performs a blocking operation, and when the load line breaks, the breaker performs a related operation such as a reclosing operation in conjunction with a protection relay (S36).

In addition, if the load cannot be supplied due to a failure of the power supply (bus) side, ① A failure occurs in the second power supply (bus) side as shown in Fig. 5 (c). Acquisition of information → ③ Equipment manager recognition status → ④ Automatic opening of the main supply breaker (CB1) → ⑤ Automatic insertion of the rear feed breaker (CB2) → ⑥ Resumption of load supply to the transmission and distribution lines → ⑦ Recognition of all operators (S37) . More specifically, when no voltage is applied to the power supply (bus) side, the first breaker (DS1) is open-The first breaker (CB1) is open-No voltage is # 1 27-No voltage is applied to # 2 27-2 breaker ( DS2) The load supply is resumed by opening the first breaker (CB1) and closing the second breaker (CB2).

7 is a selective circuit driving circuit diagram applied to a circuit breaker facility. The information is received from each element to be processed and automatically detectable circuits such as alarms for monitoring the selective circuit and remote monitors. It is possible to transmit to the supervisor, Figure 8 is a signal circuit configuration diagram that the circuit breaker input / open signal directly connected to the circuit breaker when the automatic control transmission from the selective circuit drive circuit applied to the circuit breaker can be changed to the final supply circuit have.

Such a load switching method using two circuit breakers according to the present invention is a method for uninterrupting by providing a quick load supply when the distribution peripheral voltage transformer and the bus voltage are not applied. It operates by location or by taking appropriate follow-up measures and has the following characteristics.

1) It is characterized by suggesting ways to prevent power transmission restrictions by operating facilities so that there is no disturbance power of electrical facilities.

2) As it is an electrical load facility, a method for switching to minimization of power failure time is required, so it is used as an instantaneous switching step.

3) It can be safely realized by utilizing breaker facilities and can be used as a separate device.

4) It presents future ways of operating a mother ship and seeks to make an uninterrupted leap forward.

Accordingly, the present invention, the configuration of the transmission and distribution line breaker is simple, effective in the life and death of the power supply (bus) and the breaker operating state system status, excellent effect of minimizing the power failure and safe operation of the equipment operation of each facility There is an advantage that the part can be performed smoothly, and there is an advantage that the operator acquires whether the signal transmission reaches the end.

As described in the above embodiments, the present invention provides two circuit breakers in one distribution line at the time of supplying the distribution load by obtaining information using a monitoring contact and a low voltage detection relay. By using the instantaneous switching method that minimizes the time of load interruption caused by the bus side fault to the instantaneous failure, it automatically recovers the power supply automatically and prevents misoperation, prevents power failure, and improves the ability to cope with failure. Uninterruptible power can be aimed at, and two circuit breaker facilities can be used to monitor the main power supply interruption status of the main supply circuit breaker at any time. To reduce power outage time and spread, and to automate operations and power outages. It can effectively supply power without interruption by shortening the time, and minimize the time for resuming the load supply in case of power failure by using two circuit breakers, electrical circuit facilities, to supply high quality electricity without interruption. After re-supplying power to the load, the related failure equipment problem enables the maintenance of the facility through diagnosis, reducing the failure and spreading power failure, and operating the efficient power equipment by automating operation and reducing the time. Has

Claims (3)

delete delete First and second disconnectors each having one end connected to two power supply (bus) sides to transmit power; First and second circuit breakers each having one terminal connected to the other end of the first and second disconnectors and the other terminals connected to each other to transmit power; A third disconnector having one end connected to the connection point of the first and second breakers and the other end connected to the transmission and distribution line to transmit power; And It comprises a first and a second low voltage detection relay connected to the power (bus) side, respectively, When a failure occurs on the power supply (bus) side, use the first and second low voltage detection relays described above to check the health power supply (bus) of the two power supply (bus) sides, and then check each power supply (bus) side. The load distribution circuit breaker of a power distribution line, characterized in that the supply of the load by inserting the breaker and the breaker in advance.

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