KR20150034154A - Power distribution monitoring apparatus - Google Patents

Abstract

A power distribution monitoring apparatus is disclosed. The power distribution monitoring apparatus is installed in a distribution board including a plurality of circuit breakers to monitor a current fault condition using an analogue contact point installed in each circuit breaker and to monitor power distribution conditions.

Description

[0001] POWER DISTRIBUTION MONITORING APPARATUS [0002]

Embodiments of the invention relate to a distribution monitoring apparatus.

Traditionally, the current supplied to the server has been monitored on a rack-by-rack basis. However, if the current supplied to each server is actually measured, it is monitored that the current decreases in the rack unit even if the normal current is supplied from the distribution board side. Therefore, there is a problem that it is difficult to accurately measure the current consumption in the rack-based current detection.

On the other hand, in the past, trips in the distribution panel were detected based on current detection, that is, the amount of current flowing in the circuit breaker.

For example, Korean Unexamined Patent Application Publication No. 10-2013-0003531 (published on Jan. 9, 2013) entitled " Detector for circuit breaker coupling and detection system for anomalous information using the circuit breaker " And a detecting device for digitally processing information on the detected line condition and outputting the detected information to the outside are connected to a circuit breaker provided on the side of the main switchboard and the side of the floor panel side, Which is detachably mounted in the form of a plate.

However, in the conventional detection methods, the software judges whether or not the current flows based on the minimum current usage amount (for example, 0.2 A) flowing in the circuit breaker regardless of whether the breaker is on, off, It is difficult to recognize the accurate trip state and therefore, an error occurs when the wire is detected.

For example, in the conventional detection method, when the internal servers of the racks receiving current from the breaker move when the breaker is on, or when the servers are rebooted in bulk, the current consumption instantaneously disappears, There is a problem.

Therefore, there is a demand for a method that can more accurately measure the amount of current used and recognize the trap.

A power distribution monitoring apparatus capable of accurately measuring the current consumption per quarter is provided.

A distribution monitoring apparatus is provided that can accurately detect disconnection by more accurately recognizing current faults such as trips.

The power distribution monitoring apparatus is installed in a distribution board including a plurality of circuit breakers, and can monitor the current failure state and monitor the power distribution state using the analog contacts provided in the respective circuit breakers.

According to one aspect of the present invention, the power distribution monitoring apparatus physically senses a trip state of each of the plurality of circuit breakers by collecting analog contacts respectively provided in the plurality of circuit breakers.

According to another aspect, the analog contact may include a first trip contact that physically moves in response to a trip condition of the breaker, and a second trip contact that contacts the first trip contact in accordance with the physical movement .

According to another aspect, the current usage is monitored using a CT (Current Transformer) sensor, and a cable connected to the CT sensor and a cable connected to the analog contact can be collected.

According to another aspect, the power distribution monitoring apparatus can detect a disconnection using a threshold determined based on a voltage and a current calculated for each channel or each phase.

According to another aspect of the present invention, the power distribution monitoring apparatus monitors the current fault state using the analog contact point, monitors the amount of current use by using a CT (Current Transformer) sensor connected to the analog contact point, A control unit for accumulating information on at least one of power, voltage, current, and surface temperature, and a control unit for controlling at least one of the information on the amount of usage of the accumulated current and the collected information, To the mobile communication terminal.

According to another aspect of the present invention, the power distribution monitoring apparatus further includes a storage unit for storing the amount of the accumulated current, the collected information, and at least one of the usage amount of the accumulated current installed on the front surface of the distribution board, The display unit may further include a display unit.

By installing the distribution monitoring device on the distribution board, the quarterly current usage can be accurately measured.

By aggregating the analog contacts installed on each circuit breaker, it is possible to physically and precisely monitor current fault conditions, such as trips, and thus accurately detect disconnection.

1 is a block diagram showing a power distribution monitoring apparatus according to an embodiment of the present invention.
2 is an exemplary diagram showing a detailed configuration of a distribution monitoring apparatus according to an embodiment of the present invention.
3 is a diagram showing an example of a distribution monitoring apparatus provided in a distribution board according to an embodiment of the present invention.
4 is an exemplary diagram for explaining the operation of the distribution monitoring apparatus according to an embodiment of the present invention.
5 is a diagram illustrating an example of a conventional disconnection detection method
FIG. 6 and FIG. 7 are diagrams showing examples of a disconnection detection method according to an embodiment of the present invention.
8 to 11 are views showing a trip contact and a CT sensor installed in an actual circuit breaker according to an embodiment of the present invention.
Figure 12 is a view of a collective cable in one embodiment of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a power distribution monitoring apparatus according to an embodiment of the present invention.

The power distribution monitoring apparatus according to the present invention is installed directly on the cabinet panel of the distribution board and monitors the amount of current supplied from the power supply unit on a quarterly basis and monitors the amount of current supplied from the power supply by using the analog contact set in the circuit protector ) Can be monitored. Therefore, since the power distribution monitoring apparatus according to the present invention is formed of the integrated distribution board, there is no physical consumption like the existing installation apparatus (power strip communication module, REM).

For example, the power distribution monitoring apparatus according to the present invention can collect analog contacts provided for each of the circuit breakers of the distribution board to physically confirm the trip state. In addition, the current usage can be measured every quarter based on the current value measured by the quarter CT (Current Transformer) sensor connected to the analog contact provided on the breaker.

Therefore, the power distribution monitoring apparatus according to the present invention can accurately measure current / power consumption per rack when installed in a server room, and can accurately detect disconnection by recognizing a fault (trip) accurately.

The distribution monitoring apparatus 100 according to the present invention may include a controller 110, a communication unit 120, a storage unit 130, and a display unit 140, as shown in FIG.

The control unit 110 can monitor a current fault condition such as a trip using a signal generated through physical contact of the analog contact installed in the circuit breaker included in the distribution board, It is possible to monitor the amount of current consumption by integrating the amount of current measured by the CT sensor and collecting information on power, voltage, current, surface temperature, overvoltage, SEG, and reactive power etc. , The overall operation of the power distribution monitoring apparatus 100 can be controlled.

The communication unit 120 transmits information on the current consumption accumulated in the control unit 110 and information collected by the control unit 110 to a host such as a facility management system (FMS: Facility Management System) under the control of the control unit 110. [ Device.

The storage unit 130 may store the amount of current used by the controller 110 and the collected information.

The display unit 140 may display the amount of current used by the controller 110, data collected by the controller 110, and the like, which are installed on the front surface of the distribution board.

2 is an exemplary diagram showing a detailed configuration of a distribution monitoring apparatus according to an embodiment of the present invention. 1 corresponds to the communication unit 120 in FIG. 1, and the local storage corresponds to the communication unit 120 in FIG. 1, And a display corresponding to the display unit 140 shown in Fig. 1, respectively.

The power distribution monitoring apparatus 200 can receive a user's operation through at least one key KEY and display it on a display and provide the user with a power distribution monitor It is possible to notify the state of the mobile terminal 200. At this time, the display can be controlled through the main CPU.

The main CPU receives information such as temperature, voltage, current, and power measured by the utility module 210 through a remote interface, stores it in a local storage, Monitoring of current fault conditions, such as trips, can be monitored using signals generated by physical contact of analog contacts installed on breakers in the distribution panel. In addition, the main CPU can measure the current usage amount for each branch based on the current value measured by the quarter CT sensor.

On the other hand, the power distribution monitoring apparatus 200 controls the current consumption, the power, the voltage, the current, the overcurrent, and the like to the host apparatus 220 through the Modbus RTU (Remote Terminal Unit), TCP / IP, Information of the user.

As described above, the power distribution monitoring apparatus 200 of the present invention is installed in a concentrating form of a distribution board, so that it can be more conveniently managed and data traffic can be minimized. In addition, performance upgrades are easy and users can easily monitor current usage, fault conditions, etc. in the field. Meanwhile, the power distribution monitoring apparatus 200 of the present invention can precisely monitor voltage, current, amount of power, and active power by measuring AC power using a dedicated ASIC (Application Specific Integrated Circuit) Phase Err Over Voltage, etc.) can be detected more accurately.

In addition, since the distribution monitoring device 200 according to the present invention utilizes the distributed I / O module during temperature collection, a plurality of temperature sensors can be interlocked per one distribution monitoring device, and short wiring is possible. Therefore, stability and reliability are increased, Management, usage / specification change, and maintenance / management. In addition, an inexpensive 3-wire resistance thermometer device (RTD) sensor is used and a circuit optimized for the environment is applied, allowing accurate temperature measurement to compensate for cable errors to around 20%.

3 is an exemplary view showing a distribution monitoring apparatus provided in a distribution board according to an embodiment of the present invention, and Fig. 4 is an exemplary diagram for explaining the operation of the distribution monitoring apparatus.

Referring first to FIG. 3, the power distribution monitoring apparatus according to the present invention can be installed in the distribution board 310 to more accurately monitor current consumption and recognize a current fault condition such as a trip. Meanwhile, a display 300 may be installed on the front surface of the distribution board 310 so that the user can easily monitor the display on the field.

When the distribution monitoring apparatus is installed in the server room, it can be installed in each of the distribution boards 420 and 425 so that the user can remotely monitor the operation states of the distribution boards in real time as shown in FIG.

4, the redundant power supplied from the first power supply 410 and the second power supply 420 is supplied to the first distribution panel 420 and the second distribution panel 425 Are supplied to the respective racks 441 to 445, respectively. In this case, the first distribution monitoring device 430 may be installed in the first distribution panel 420, the second distribution monitoring device 435 may be installed in the second distribution panel 425, and the distribution monitoring devices 430, 435 may notify the host apparatus through the network of information about the distribution panel operation status using TCP / IP. At this time, each of the power distribution monitoring apparatuses 430 and 435 can simultaneously measure the incoming and outgoing / single / three phases of the distribution board.

5 is an exemplary diagram showing a conventional disconnection detection method.

FIG. 5 shows a method of detecting a broken line by sensing the voltage / current at the lower end of the CP at the downstream end of the CP. This method can detect disconnection after CP, and it can detect disconnection by current value since it is entire disconnection of load. For example, it is possible to monitor the CP disconnection by detecting the voltage value at the time of CP off according to the load abnormality, to determine whether there is a problem or a load problem at the power input terminal, and to detect within one second. However, such a conventional disconnection detection method has a disadvantage that the voltage sensing line must be added for each channel, and the number of components increases.

FIG. 6 and FIG. 7 are diagrams showing examples of a disconnection detection method according to an embodiment of the present invention.

Next, FIG. 6 shows an example of a method for detecting disconnection by installing an auxiliary contact (CP monitoring IO 600) in the CP and monitoring the CP trip through the IO 600. FIG. This method detects the CP trip due to the load problem through the general IO (600) of the board, and can stably monitor the CP trip and detect the disconnection within a few milliseconds. The IO 600 may correspond to the trip contact cable 900, the first trip contact 1010, and the second trip contact 1020, which will be described with reference to FIGS. 9 and 10.

Meanwhile, FIG. 7 shows a method of detecting a disconnection by calculating or measuring the voltage and current for each channel / phase and designating a value below a predetermined value as a disconnection threshold. This method can be operated stably through reflection of experiential value, and there is no hardware burden such as IO / additional sensor installation. In addition to being able to monitor only the active power of measurement data, It is advantageous to add a stable algorithm to the threshold value. However, there is a disadvantage that the boundary with noise at low current can be ambiguous.

Therefore, the disconnection detection method of Figs. 6 and 7 can be applied to the distribution monitoring apparatus according to the present invention in combination. In this case, minimal hardware is added, load considerations are optimized, and fast response times can be achieved. In other words, this method can deduce that the disconnection problem is caused by an abnormality of the load current caused by the CP trip, and it is not necessary to determine the cause of the voltage / current noise at the CP trip, . In addition, the minimum current for the load can be specified, and a stable algorithm for the threshold value can be added later by a software method.

7A shows a method of detecting disconnection by the power distribution monitoring apparatus 710 in the case of a 3Phase power source and FIG. 7B shows a method of detecting the disconnection in the case of a single phase power source. (720) detects a disconnection.

FIGS. 8 to 11 are views showing a trip contact and a CT sensor installed in an actual circuit breaker according to an embodiment of the present invention, and FIG. 12 is a diagram showing an assembled cable. In order to facilitate understanding of the present invention, FIG. 8 shows a distribution board including a plurality of circuit breakers, and FIG. 9 is an enlarged view of a trip contact cable 900 installed in each circuit breaker. 10 shows the analog contacts (the first trip contact 1010 and the second trip contact 1020), and FIG. 11 shows a state where a plurality of CT sensors 1100 are arranged.

For example, in one breaker, when the breaker is tripped, the first trip contact 1010 physically moves into contact with the second trip contact 1020, 9 through the trip contact cable 900 connected to the trip contact point 1020 so that it is possible to confirm whether the circuit breaker is tripped or not.

Also, the power distribution monitoring apparatus can monitor the current usage based on the current value measured by the CT sensors 1100.

Meanwhile, as shown in FIG. 11, the distribution monitoring apparatus according to the present invention can collect the cable connected to the trip contact and the cable connected to the CT sensor, thereby detecting the trip state for each branch, and simultaneously measuring the current usage amount .

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. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

100: Distribution monitoring device
110:
120:
130:
140:

Claims (1)

A distribution monitoring apparatus installed in a distribution board including a plurality of circuit breakers, monitoring a current fault state by using an analog contact provided in each circuit breaker, and monitoring a distribution state.

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