KR101831970B1 - A monitoring method for power measuring system - Google Patents

Abstract

The present invention relates to a method of operating a breaker-integrated power measuring apparatus for monitoring the state of load power of a circuit breaker, and more particularly, to a method of monitoring a power state of each load connected to a circuit breaker, The present invention relates to an implementation of a breaker-integrated power measuring technique capable of measuring the power state of an individual load connected to a breaker by installing the power source of the entire distribution without interruption of power supply. The breaker integrated power meter for monitoring the load power state of each breaker according to the present invention does not disconnect the breaker from the booth bar and the power cable without interrupting the power supply when installing the power measuring module; No additional space is required in the distribution front and in the power panel for the installation of the power metering module; Wherein when the form of the power line connected to the breaker is a booth bar, the booth bar support stand is attached and the power measuring module is installed and fixed to the breaker; Wherein when the type of the power line connected to the breaker is a cable, the cable dedicated support is attached and the power measuring module is installed and fixed to the circuit breaker; A single-pole power measurement module may be installed to connect the single-phase, three-phase three-wire and three-phase four-wire terminals of the circuit breaker individually; A power measuring module corresponding to the single phase, the three-phase three-phase line and the three-phase four-phase line of the circuit breaker may be installed; A Hall effect sensor based measurement method is applied to measure the amount of current flowing through the circuit breaker; A contact terminal is provided which is in contact with a terminal of the circuit breaker for measuring the phase and line voltage and calculating the power factor; And RS-485 and Zigbee communication methods are applied to communication between the breaker and the power measuring module and communication between the power measuring module and the monitoring device.

Description

TECHNICAL FIELD [0001] The present invention relates to a monitoring method for a power meter,

The present invention relates to a method of operating a breaker-integrated power measuring apparatus, and more particularly, to a power measuring apparatus installed to monitor a power state of each load connected to a breaker, To a breaker-integrated power measurement technique capable of measuring the power state of an individual load connected to a breaker.

The existing power meter is either a method of disconnecting the power supply for installation, disconnecting the breaker, connecting the power meter to the busbar and connecting the breaker again, or disconnecting the power cable connected to the next stage of the breaker It is a method to connect the power cable to the circuit breaker after installing the power measuring device, so that all devices must be installed after shutting off the power supply. Since the volume of the power measuring device is large, It has a disadvantage that it is a structure difficult to install.

A similar prior art for disclosing a breaker-integrated power meter for monitoring the load power status of a breaker according to the present invention includes: 1) Korean Patent Laid-Open Publication No. 10-2009-0062915, entitled "Electronic circuit breaker integrated electric meter". The prior art technique includes an opening / closing mechanism for driving the movable contactor to an energized position where the movable contactor contacts the fixed contactor and a disconnection position separated from the fixed contactor, and a crossbar (TRIGGER) for rotating the opening / CROSS BAR), and a coil assembly (COIL ASSEMBLY) that rotates to trigger the crossbar when magnetized; A current detector for detecting a current value flowing on the circuit; A voltage detection unit for detecting a voltage value on a circuit; A common control unit for the circuit breaker and the electronic watt-hour meter, the control unit calculates a used power amount by integrating a current value from the current detecting unit and a voltage value from the voltage detecting unit, calculates a current value from the current detecting unit, And outputs a cutoff control signal for magnetizing the coil assembly when an abnormal current is generated in the circuit.

Another prior art is 2) Korean Utility Model Publication No. 20-2011-0006841 entitled " Embedded Integrated Control Communication Device for Distribution System Switchgear ". The prior art communication control device for controlling a plurality of breakers and switches of a power distribution system and capable of communicating with an upper distribution automation system of the power distribution system includes a built-in integrated communication control device for controlling a contact state signal of the breakers and switches from the breakers and switches And outputs an open / close control signal to the breaker and the switch; And a control unit connected between the breaker and the switchgear control unit to receive a contact state signal of the breaker and the switchgear from the breaker and the switchgear and to provide the switchgear control signal to the switchgear control unit, A contact signal connection unit for converting the electrical signals into electrical signals to provide the breakers and switches; A display and operation unit for transmitting the display of the contact state signal and the operation input of the user; An upper communication unit connected for communication with the higher distribution automation system; And a control unit connected to the upper communication unit, the switch control unit, and the display and operation unit to communicate with the upper communication unit and process the information received from the switch control unit and the display and operation unit, A main controller for outputting the open / close control signal for controlling opening and closing of the main body; A power supply circuit unit for converting AC power from the power distribution system into DC power and supplying operating power to the breaker and the switch, and supplying power to the upper communication unit, the main control unit and the switch control unit; And a single enclosure for housing the switch control unit, the contact signal connection unit, the upper communication unit, the main control unit, and the display and operation unit therein.

However, in the related art prior art described above, the power state of the individual load connected to the circuit breaker is measured by installing the power measuring device installed to monitor the power state of each load connected to the circuit breaker, It is not possible to provide a breaker integrated power measurement technique which can be used.

KR10-2009-0062915 (A) KR20-2011-0006841 (U)

The present invention aims to satisfy the technical needs required from the background of the above-mentioned invention. In order to solve the above problems, an object of the present invention is to provide a power meter capable of being connected to a circuit breaker among power measuring devices installed to monitor the power state of each load connected to the circuit breaker, Which is capable of measuring the power state of the breaker-integrated type power meter.

The technical objects to be achieved by the present invention are not limited to the above-mentioned problems, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description. There will be.

In order to accomplish the above object, according to the present invention, there is provided a breaker-integrated type power measuring apparatus for monitoring the load power state of each circuit breaker, wherein the breaker is not separated from the bus bar and the power cable, No additional space is required in the distribution front and in the power panel for the installation of the power metering module; Wherein when the form of the power line connected to the breaker is a booth bar, the booth bar support stand is attached and the power measuring module is installed and fixed to the breaker; Wherein when the type of the power line connected to the breaker is a cable, the cable dedicated support is attached and the power measuring module is installed and fixed to the circuit breaker; A single-pole power measurement module may be installed to connect the single-phase, three-phase three-wire and three-phase four-wire terminals of the circuit breaker individually; A power measuring module corresponding to the single phase, the three-phase three-phase line and the three-phase four-phase line of the circuit breaker may be installed; A Hall effect sensor based measurement method is applied to measure the amount of current flowing through the circuit breaker; A contact terminal is provided which is in contact with a terminal of the circuit breaker for measuring the phase and line voltage and calculating the power factor; And RS-485 and Zigbee communication methods are applied to communication between the breaker and the power measuring module and communication between the power measuring module and the monitoring device.

As described above, according to the present invention, when the power measuring apparatus is used, it is possible to install the power measuring apparatus without shutting off the power supply, so that the operation of the load is not stopped during the installation and a separate space for the power measuring apparatus is not required. The entire distribution panel and the power panel can be installed, so that it is not necessary to replace the distribution panel and the power panel for installation.

It is to be understood that the technical advantages of the present invention are not limited to the technical effects mentioned above and that other technical effects not mentioned can be clearly understood by those skilled in the art from the description of the claims There will be.

1 is a block diagram of an integrated power measuring module connected to a breaker;
Fig. 2 is an example of a support bar shape for fixing a breaker-integrated power measuring device; Fig.
3 is an exemplary view of a separate type and integral type power measuring device integrated with a breaker;
FIG. 4 is an exemplary view showing a state in which a phase-by-phase integrated power measuring device and a separated type power measuring device are coupled to a breaker;
5 is a block diagram of a power status measuring apparatus for each circuit breaker using a conventional power measuring apparatus;
6 is an exemplary view of a power measurement device incorporating a conventional CT sensor and a power measurement device incorporating a Hall effect sensor;
7 is a block diagram of a smartphone remote monitoring system;
8 is a block diagram of a smartphone application software;
FIG. 9 is an implementation flow chart of a daily average power load prediction algorithm for a shaking day and a neighboring day.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It is not. In the following description of the present embodiment, the same components are denoted by the same reference numerals and symbols, and further description thereof will be omitted.

Prior to the detailed description of each step of the invention, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings, and the inventor shall design his own invention in the best manner It should be interpreted in the meaning and concept consistent with the technical idea of the present invention based on the principle that the concept of the term can be properly defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 to 6, a breaker integrated power device for monitoring the load power state of each circuit breaker according to the present invention will be described in detail.

1 shows a block diagram of an integrated power measuring module connected to a breaker. The integrated power measurement modules 105 and 106 connected to the circuit breaker in FIG. 1 may be installed in the bus bar 103 connected to the circuit breaker, or may be installed in the cable 104 connected to the circuit breaker. The power state measured by the power measurement modules 105 and 106 is transmitted to the monitoring device 101 that can be installed at one side of the distribution throughout the distribution line via the RS485 or Zigbee communication first communication line 102 And can execute an instruction according to a control command from the monitoring apparatus 101. [ The monitoring device 101 may be connected to a central control unit 108 located at a remote place through a second communication line 107 of an Ethernet, Wi-Fi or mobile communication network, Can be connected to the device. The power measuring modules 105 and 106 are integrated with circuit breakers and are advantageous in that they do not need to cut off the power supply for installation or have a separate space for the power measurement modules 105 and 106 to be installed. And a contact terminal which is in contact with the terminal of the circuit breaker for measuring the phase and line voltage and calculating the power factor.

FIG. 2 is an exemplary view showing a support stand shape as one of the methods for fixing the breaker-integrated power measurement module. 2, a booster bar mounting support 201 to be attached to the bus bars 103 and 202 is formed in a structure that is fixed by the fixing support A 203 when attached to the bus bars 103 and 202 . The cable attaching support base 204 attached to the cables 104 and 205 is a structure that is easy to attach to the cables 104 and 205. The support base 204 is fixed to the fixing base B (Not shown). The thickness of the bus bars 103 and 202 and the cables 104 and 205 is smaller than the thickness of the bus bar attaching support 201 and the cables 104 and 205 due to the fixing pedestal A 203 and the fixing pedestal B 206, And has an effect of preventing movement even if it does not exactly coincide with the attachable support base 204.

Fig. 3 shows the shape of a separate type integrated power measuring module capable of being integrated with the circuit breaker. The power measurement modules 105 and 106 are divided into a single phase type separate type power measurement module 301 and an integrated type power measurement module 303. The separate power measuring modules 301 and 302 and the integrated power measuring module 303 may be connected to a support bar A 304 corresponding to the shape of the power line such as the bus bar 103 or 202 or the cable 104 or 205 to be installed ), The support base B (305), and the support base C (306). That is, in the case of the bus bar type power measurement module, it can be combined with the bus bar type support, and in the case of the cable type power measurement module, it can be combined with the cable type support. FIG. 3 shows an embodiment of the integrated module for a single-phase circuit breaker. However, such a configuration can be applied to a single-phase type, a three-phase three-line type, and a three-phase four-line type.

4 is a block diagram showing the configuration of the integrated type power measurement modules 303 and 404 and the separate power measurement modules 301 and 302 when the bus bars 103, 202, and 403 are coupled to the power line connection terminal 402 of the circuit breaker 401. [ 405 are coupled to the breaker. In one embodiment, the integrated power measuring module (303, 404) has a suitable structure to be coupled with each phase bus bar connection terminal portion of the single phase breaker, so that a separate space for coupling is not required, (301, 302, and 405) connect the power measurement module to each of the breaker connection terminals by a phase, and a master module is installed in the + phase terminal and a slave module is installed in the upper terminal. Such a structure is characterized in that it can be applied in a similar manner to a single-phase type, a three-phase three-line type, and a three-phase four-line type.

5 is a block diagram of a power status measuring device for each circuit breaker using a conventional power measuring module. The power measurement module A (501A) installed on the left side of FIG. 5 is a power measurement system using a CT sensor, which is one of the current measurement sensors, and is installed in a part of a cable (502A) The installed power measuring module B 504B is provided between the bus bar for the power line and the breaker so that the power measuring module B 504B including the additional bus bar 503B for measurement other than the booster bar for the power line in the distribution line is installed It is a device that grasps the state. Both the power measurement module A 501A and the power measurement module B 504B cut off the power for installation and disconnect the breaker and the cable or the bus bar, There is a disadvantage that not only power supply is required after installing the measurement module B 504B but also a separate space is required for the power measurement module A 501A and the power measurement module B 504B.

FIG. 6 shows a power measurement module C (601C) incorporating a conventional CT sensor and a power measurement module D (603D) incorporating a Hall effect sensor. In order to measure current, the power measuring module 601C incorporating the CT sensor must penetrate through the hole in the power measuring module 601C separated by the power cable C 602C for each phase, The measurement module D (603D) incorporates a separate measurement busbar D (604D) for measuring the current. In order to install the power measurement module C 601C and the power measurement module D 603D, not only the power is shut off but also a separate space for installation is required.

Generally, a system for monitoring electric facilities is mainly used by the output of a local unit installed at the site or monitored by a remote server using an Internet network. However, in case of such a local unit, it is possible for the administrator to analyze the status of the electrical equipment only at the site visit, and in case of monitoring through the existing remote server, the electric equipment can be monitored only by using the PC in the office or monitoring room, It is difficult to recognize. To overcome such disadvantages, the present invention proposes an application for smartphone electric equipment monitoring and diagnosis that can perform monitoring and diagnosis of electric equipment anytime and anywhere using a smartphone. The performance of the smartphone equipped with high-speed processor, several GB memory and touch screen hardware has already been processed and analyzed only by the existing PC. In recent years, And it is possible to reduce the management and maintenance cost and time required for the target electric equipment through the dynamic operation management which overcomes the temporal and spatial limitation by the smart phone. The remote monitoring system of the electric equipment using the smart phone is composed of various remote servers, local units, various sensors, and smartphone applications (FIG. 7). The smart phone application obtains the accumulated on-site information in the database of the remote server or the memory of the local unit at the time of operation, analyzes the tendency of the data in the field, abnormal signal or alarm, This allows the manager to optimize and operate the electrical equipment.

Smartphone servers are built using a server system rather than a regular PC for the reliability of the remote surveillance system. The smartphone server receives data from TCP / IP from the modular local unit attached to the electric equipment and accumulates the data, and communicates with the smart phone through an Ethernet network or 3G / LTE network via Wi-Fi do. The modular local unit of the remote monitoring system of the electric equipment using the smart phone is generally designed as a single unit so that the parts that were wasted at the functional cost according to the site in the field are improved, It is designed so that it can be designed and manufactured as a module type hardware of a slot card type so that the manager can use only necessary functions according to the field. The module of the modular local unit consists of the required module and the optional module. Required module is required for operation of local unit and basic power parameter measurement. It consists of power module, CPU module, and power measurement module, and optional module consists of temperature measurement module and waveform capture module. The power module includes a function of supplying power to the unit and each module. The CPU module analyzes the data transmitted from each module and transmits the analyzed data to a remote server. The power measurement module includes a CT And PT, and the temperature measurement module has a function of measuring the transformer and the panel temperature. Finally, the waveform capture module has a function of analyzing the voltage and current values from the PT And has a measurement function. The communication of each module of the modular local unit is memory bus type. A memory bus is a commonly used data transfer technique in personal computers and is used for data transfer between a CPU and a RAM (RAM) having a memory function installed in the system. In this modular local unit, the CPU located in the CPU module and the RAM installed in each measurement module are used to establish a memory bus communication process, and the measured data is communicated in each module. The modular local unit optionally connects a separate panel PC type monitor, controls and controls the modular local unit and electrical equipment via a panel PC type monitor, and immediately measures and measures the electrical equipment in the field when the smartphone is not available. The results of the analysis can be confirmed. Panel PC type monitor is designed to enable both process and display using CPU and 7 inch touch screen, and can check system diagram, comprehensive diagnostic screen, current operation status and so on. The system diagram of the PC local software built in the panel type monitor can output the electrical equipment information and the measurement information, and can construct the system diagram. Diagnosis screen consists of transformer diagnosis and power monitoring. It monitors the main components of the electrical equipment and measures the load ratio, allowance capacity and efficiency of the transformer, monitors the voltage, current, power, power factor, , Leakage current per circuit, transformer and temperature by line, and notifies the manager. Also, it consists of an information analysis screen that displays measured values of the measuring instruments linked through the measurement information, and provides a daily changing tendency at predetermined time intervals. And an alarm status inquiry function for inquiring current alarm status and cumulative alarm history, and a report function for inquiring and outputting daily reports, monthly reports, and annual reports.

Smartphone applications for remote monitoring of electrical equipment are largely composed of security access, monitoring and diagnostic functions (FIG. 8). The flow of the program is configured to check whether or not the connection is authorized by checking whether or not the connection is attempted and to search and select the customer managed by the user when the connection is permitted. And can freely move between the menus by selecting a function arbitrarily, thereby managing the target electric equipment. The smartphone application itself has various calculation formulas and algorithms necessary for analyzing various results, but it does not have a database. If necessary, it transmits data accumulated in the smartphone server using 3G / LTE network or Wi-Fi communication, And presents the measurement result to the user. The Smartphone application, which is the client of the remote monitoring system using the smartphone, can monitor both the current and cumulative power usage of the target electric equipment, the current electric equipment operation status, and the alert status generated, The security function is applied so that only authorized administrators can access the smartphone server. When an attempt is made to access a smartphone server using a designed smartphone application, the smartphone server searches the administrator authentication information database and a warning message window is displayed when the phone number of the smartphone requesting access is not authenticated on the database And denies the connection.

The monitoring function of the smartphone application for the electric facility monitoring diagnosis diagnosis consists of the comprehensive diagnosis function, the measurement information function, and the report function.

The comprehensive diagnosis function comprehensively analyzes the operation status of the target electrical equipment and analyzes the overall operation status of the electrical equipment by analyzing the items such as voltage, current, power, quality, temperature, etc. at a glance And the like. Monitoring items of the measurement information function are voltage, current, active power, power factor, load factor, transformer temperature, panel temperature, unbalance rate, voltage THD, current THD, frequency, integrated power, current demand, peak demand, It is composed of basic items of electric equipment and features detailed information of selected items and trends of changes when they are clicked. In addition, the smartphone application has the function of providing report of the current or past electric equipment condition monitoring result, and the report can be selected from the daily report and monthly report. The contents of the report are composed of time, monthly, monthly voltage, current, power, power factor, and power. For the sake of the manager's convenience, the smartphone application for monitoring and monitoring electric facilities has the function of providing the customer location display. The display method is to use the camera and GPS built in the smartphone to set the location of the customer within the radius set in the real image And a map function for displaying the position of the user by using an augmented reality function for displaying and a map capable of enlargement and reduction.

The diagnosis function can diagnose the status of the target electric equipment by analyzing the accumulated trends from the past to the present and the accumulated signal abnormality by comparing the data accumulated in the remote server of the smart phone with the present measured value. The diagnostic functions of smartphone applications are based on three factors: forecasting, anomaly diagnosis, and energy use analysis. The forecasting function is to predict the future value of each measurement item from the present time to the 24th of the day. Predicted items consist of voltage, current, power, power factor, load factor, transformer temperature and panel temperature. The algorithms applied to this function are designed based on the assumption that they are closest to the patterns of similar days in the past (possible recent days), and the process of constructing the prediction model is as follows: (1) A step of constructing a model, and a step of predicting a 24-hour pattern curve of a predicted date. The daily average power load prediction algorithm among the applied algorithms is shown in FIG.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, will be. Accordingly, the true scope of the present invention should be determined only by the appended claims.

101: Monitoring device 102: First communication line
103, 202, 403: Busbar
104, 205: cables 105, 106: power measurement module
107: second communication line 108: central control device
201: Support bar with a booth bar 203: Fixing bracket A
204: Cable mounting type support base 206: Fixing base B
301, 302, 405: Separate Power Measurement Module
303, 404: Integrated power measuring module
304: Support A 305: Support B
306: Support C
401: Circuit breaker 402: Power line connection terminal
501A: Power measurement module A 502A: Cable connected to breaker
503B: Busbar for measurement 504B: Power measurement module B
601C: Power measurement module 602C: Power cable C
603D: Power measuring module D 604D: Measuring booth bar D

Claims (3)

A power measuring module (105, 106) connected to a breaker is installed in a bus bar (103, 202) connected to the breaker and a cable (104, 205) connected to the breaker,
When the power measurement modules 105 and 106 are attached to the bus bars 103 and 202
The power measurement modules 105 and 106 are attached to the bus bars 103 and 202 by the support bars 201 and when the power measurement modules 105 and 106 are attached to the bus bars 103 and 202 And is attached to the cables 104 and 205 by a cable attaching support 204 when the power measuring modules 105 and 106 are attached to the cables 104 and 205, The power measuring modules 105 and 106 are fixed by a fixing pedestal B 206 when the power measurement modules 105 and 106 are attached to the cables 104 and 205. The power measuring modules 105 and 106 are connected to the monolithic separable type power measurement modules 301 and 302 And the integrated type power measurement module 303 are connected to the bus bars 103 and 202 or the cables 104 and 202 to be installed, 205), a support A 304, a support B 305 and a support C 306, which correspond to the form of the power line, The amount of current flowing through the circuit breaker to the structure is measured using a Hall effect sensor, in the circuit breaker by operating method of the circuit-breaker integrated power measuring device for monitoring the load power condition,

The power state measured by the power measuring modules 105 and 106 is transmitted to the monitoring device 101 installed at one side of the distribution inside and outside the distribution through the first communication line 102 or the control command from the monitoring device 101 The monitoring device 101 is connected to a central control device 108 located at a remote place via a second communication line 107 so that the central control device 108 transmits to a smart phone through a wireless communication network,
The application program installed in the smart phone is composed of a security connection function, a monitoring function and a diagnosis function,
The program security access function includes a step of judging whether or not the connection is allowed or not by examining whether or not the connection is attempted when the connection is attempted;
When the connection is permitted, selecting a target customer and arbitrarily selecting various functions within the program, moving between the menus freely and managing the target electrical equipment,
The smartphone application, which is a client of the remote monitoring system of the electric equipment using the smart phone, monitors the current and cumulative power consumption of the target electric equipment, the current electric equipment operation status,
When an attempt is made to access the smartphone server using the smartphone application, the smartphone server searches the administrator authentication information database and a warning message window is displayed when the phone number of the smartphone requesting connection is not authenticated on the database However,
The monitoring function of the smartphone application for the electric facility monitoring and diagnosis has the comprehensive diagnosis function, the measurement information function, and the report function,
The comprehensive diagnosis function comprehensively analyzes the operation status of the target electric equipment and comprehensively analyzes each item such as voltage, current, power, quality, and temperature. The monitoring items of the measurement information function include voltage, current, It consists of basic items of electrical equipment such as active power, power factor, load factor, transformer temperature, panel temperature, unbalance rate, voltage THD, current THD, frequency, integrated power, current demand, peak demand, When you click on it, you will see the details of the selected item and the trend of change,
It has an augmented reality function that displays the location of a customer within a radius set in a real image using a camera and a GPS built in the smartphone, and a map function that displays the location of the user using a map that can be zoomed in and out,
Diagnosis function compares the data accumulated in the remote server of the smartphone with the present measurement value to analyze the tendency of the change from past to present and the accumulated signal abnormality to diagnose the condition of the target electric equipment, Usage analysis is applied,
The forecasting function predicts the future values of each measurement item from the current time to the 24th of the day. The prediction items consist of voltage, current, power, power factor, load factor, transformer temperature, panel temperature, The process of constructing the model comprises the steps of constructing a pattern of the same day of the week; Constructing a daily average prediction model; And estimating a 24-hour pattern curve of the predicted day. delete delete

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