KR20200027590A - System for operating power facilities and method thereof - Google Patents

Abstract

The present invention relates to a system for operating power facilities and a method thereof, which can implement a power supply of high quality. The system for operating power facilities comprises: a sensor unit obtaining state information of power facilities for power distribution to transmit the state information in accordance with a preset transmission condition; an analysis unit analyzing a state of the power facilities by applying a preset state determination algorithm to the state information of the power facilities transmitted from the sensor unit and determining a current state of the power facilities or predicting a failure state of the power facilities based on an analysis result; and an integrated operation unit controlling operation of the sensor unit and the analysis unit based on manipulation of a user and receiving and outputting the analysis result of the state information of the power facilities and the state of the power facilities from the analysis unit to monitor an operation state of the power facilities of the user.

Description

Power equipment operating system and method {SYSTEM FOR OPERATING POWER FACILITIES AND METHOD THEREOF}

The present invention relates to a power device operating system and method, and more specifically, a power device operating system and method for remotely acquiring, analyzing, and diagnosing an abnormal state of a ground power device such as a transformer and a switch to operate the power device. It is about.

Distribution intelligence uses wired or wireless communication methods to measure the current and voltage of the distribution line, and when a distribution system fails, it quickly separates the failure section and transmits the healthy section through remote opening / input of the load switchgear ( Recovery). Ground power equipment that is subject to distribution intelligence monitoring includes transformers (ground transformers) that change the value of voltage or current using electromagnetic induction, and switchgear (ground switch) to cut off the power supply when an abnormality occurs in the distribution line. There is.

Currently, as the diagnosis and monitoring of the transformer is performed by personnel inspection, only data at the time of inspection can be acquired, so there is a limit to the range of data that can be secured. In other words, it is not possible to know the exact load situation of different transformers for each time zone, such as late-night load, and it is impossible to grasp the exact utilization rate and load rate of the transformer, which may cause unnecessary transformer replacement or burnout. Difficulties and the possibility of safety accidents are inherent. Furthermore, the low-voltage distribution intelligent system that is currently applied has its functions limited to the detection of fault section and current load, and the FRTU (Feeder Remote Terminal Unit) for system configuration is expensive and a dedicated optical communication network should be provided. There are constraints on field application.

On the other hand, the status monitoring of the switchgear is performed by the Distribution Atomization System (DAS), but the power distribution intelligence system monitors the status of the switchgear, that is, gas pressure, on / off status monitoring, control box opening and closing confirmation, etc. Its function is limited, and inspection of the switchgear itself is performed by manpower inspection. Therefore, only the state at the time of inspection of the switchgear can be grasped, and the function of diagnosing the state by obtaining historical data for determining the degree of deterioration progress is absent. Furthermore, since a general ground switch that is not connected to a communication network cannot be remotely monitored and operated, there is a problem that it takes a lot of time to extract the corresponding switch in case of a failure.

Background art of the present invention is disclosed in Republic of Korea Patent Publication No. 10-2002-0067902 (published on August 24, 2002).

The present invention was devised to solve the above-mentioned problems, and an object according to an aspect of the present invention is to remotely acquire status information of a ground power device such as a ground transformer and a ground switch using an IoT sensor and to perform a predetermined analysis server. Through the real-time automatic analysis of the condition of the ground equipment, it provides an alarm for the abnormal condition of the power equipment, thereby improving the efficiency of facility management and providing a power equipment operating system and method that can realize high-quality power supply through predictive failure. will be.

The power device operating system according to an aspect of the present invention acquires state information of a power device for power distribution and transmits it according to a preset transmission condition, and is preset to state information of the power device transmitted from the sensor unit The analysis unit analyzes the state of the power device by applying a determination algorithm, determines the current state of the power device based on the analysis result, or predicts a failure state of the power device, and the sensor unit based on user manipulation And an integrated operation unit that controls the operation of the analysis unit and receives and outputs state information of the power device and an analysis result of the power device status from the analysis unit for monitoring the user's operation state of the power device. It characterized in that it comprises a.

In the present invention, the power device includes a transformer, and the state information of the power device is state information of the transformer, the load rate, voltage, load current, internal pressure, insulation oil temperature, ultraviolet information, acceleration, and slope of the transformer And internal hydrogen concentration.

In the present invention, the analysis unit analyzes the state of the transformer for each type by using the state information of the transformer in combination based on the state determination algorithm, wherein the type includes a winding short of the transformer, a winding break, and an external object. It is characterized in that it includes one or more of the collision, overload condition, load unbalanced condition, exceeding the prescribed rated utilization rate, outside the preset voltage maintenance range, abnormal temperature of the insulating oil, and abnormal internal pressure.

In the present invention, the power device includes a switch, and the status information of the power device includes status information of the switch, and includes one or more of leakage current, elbow temperature, acceleration, and slope of the switch. It is characterized by.

In the present invention, the analysis unit analyzes the status of the switchgear by type by using the status information of the switchgear based on the status determination algorithm, but the type is an elbow connection material abnormality of the switchgear, a collision with an external object , And leakage current exceeding.

In the present invention, the sensor unit includes a sensor node that acquires status information of the power device, a communication unit that transmits the status information of the power device to the analysis unit, and a control unit that controls the sensor node and the communication unit in cooperation. , The control unit is characterized in that it transmits the self-diagnosis result information of the sensor unit together with the status information of the power device to the analysis unit through the communication unit.

In the present invention, the analysis unit analyzes the state of the sensor unit by type by applying the status determination algorithm to the self-diagnosis result information of the sensor unit transmitted from the sensor unit, and transmits the analysis result to the integrated operation unit. The type is characterized in that it comprises one or more of the abnormality of the power supply of the sensor unit, an abnormality of the sensor itself sensing the power device status information, and an abnormality of the communication unit.

In the present invention, the analysis unit generates an event alarm when the state information of the power device or the self-diagnosis result information of the sensor unit satisfies an event occurrence condition according to the state determination algorithm.

In the present invention, the sensor unit is characterized in that it is installed in the transformer in a structure in which the sensor node and the body of the sensor unit are connected through a coupler attached to the pressure relief valve of the transformer.

In the present invention, the sensor unit transmits the state information of the power device according to the transmission condition according to a preset cycle, but when the state information of the power device satisfies the event occurrence condition according to the state determination algorithm, the It is characterized in that it immediately transmits the status information of the power device.

In the present invention, the sensor unit generates an instantaneous event alarm when the state information of the power device satisfies the event occurrence condition according to the state determination algorithm, and the analysis unit, the state information of the power device, the power device It is characterized by generating a trend event alarm when the determined trend value is exceeded by accumulating the status information of and analyzing the time series trend.

In the present invention, the integrated operation unit is characterized in that, based on the user's manipulation, the event occurrence conditions set in the sensor unit and the analysis unit, and the trend reference value set in the analysis unit is updated.

In the power device operating method according to an aspect of the present invention, the sensor unit acquires state information of the power device for power distribution and transmits it according to a preset transmission condition, the analysis unit, the power unit transmitted from the sensor unit An analysis step of analyzing the state of the power device by applying a preset state determination algorithm to the state information, and determining a current state of the power device or predicting a failure state of the power device based on the analysis result, and an integrated operation unit And a monitoring step of receiving and outputting state information of the power device and an analysis result of the state of the power device from the analysis unit to monitor a user's operating state of the power device.

According to an aspect of the present invention, the present invention is a complex method by securing data of the entire life cycle of a power device, compared to a conventional power device diagnosis method, which was limited to the diagnosis of the state at the time of inspection only due to the limitation of the range of data that can be secured. Through the analysis method, it is possible to accurately diagnose the condition of the power equipment and remove the inconvenience of manpower inspection to reduce human errors and inspection costs, and analyze the secured data in time series to predict the failure in advance. By doing so, it is possible to prevent the failure of a power device in advance and eliminate the cost consumption due to unnecessary replacement.

1 is a configuration diagram for explaining a power device operating system according to an embodiment of the present invention.
2 is an exemplary view for explaining a configuration of a sensor unit and an installation structure with a transformer in a power device operating system according to an embodiment of the present invention.
3 is a configuration diagram for explaining a communication method between the sensor unit and the analysis unit in the power device operating system according to an embodiment of the present invention.
4 is an exemplary view illustrating an interface screen provided by an integrated operation unit to a user in a power device operating system according to an embodiment of the present invention.
5 is an exemplary view showing a framework of a power device operating system according to an embodiment of the present invention.
6 is a flowchart illustrating a method of operating a power device according to an embodiment of the present invention.

Hereinafter, an embodiment of an operating system and method of a power device according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or practice. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a configuration diagram for explaining a power device operating system according to an embodiment of the present invention, Figure 2 is a power unit operating system according to an embodiment of the present invention describes the configuration of the sensor unit and the installation structure with the transformer 3 is a configuration diagram for explaining a communication method between a sensor unit and an analysis unit in a power device operating system according to an embodiment of the present invention, and FIG. 4 is power according to an embodiment of the present invention It is an exemplary view showing an interface screen provided by the integrated operation unit to a user in the device operating system, and FIG. 5 is an exemplary view showing a framework of a power device operating system according to an embodiment of the present invention.

Referring to FIG. 1, a power device operating system according to an embodiment of the present invention may include a sensor unit 200, an analysis unit 300, and an integrated operation unit 400.

The sensor unit 200 is installed in the power device 100 for power distribution, and obtains status information of the power device 100 from one or more sensors (not shown) installed in the power device 100 according to a preset transmission condition. It can be transmitted to the analysis unit 300 to be described later. In this embodiment, the power device 100 is a ground power device installed on a distribution line and may include one or more of a transformer (ie, a ground transformer) and a switch (ie, a ground switch).

Referring to FIG. 2, the sensor unit 200 includes sensor nodes 210 and power devices 100 that acquire status information of the power device 100 from one or more sensors (not shown) installed in the power device 100. It may include a communication unit 230 for transmitting the status information to the analysis unit 300, and a control unit 220 for controlling the sensor node 210 and the communication unit 230 in conjunction. Accordingly, the sensor unit 200 may be implemented as an IoT smart sensor that integrates the sensor node 210, the control unit 220, and the communication unit 230 into a single module, and acquires the state information of the transformer to analyze the unit ( 300) IoT smart sensor (200_TR) for a transformer to be transmitted, and IoT smart sensor (200_SW) for a switch that acquires and transmits the status information of the switch to the analysis unit 300.

The status information of the power device 100 obtained by the sensor unit 200 is the status information of the transformer, among load ratio, voltage, load current, internal pressure, insulation oil temperature, ultraviolet information, acceleration, slope and internal hydrogen concentration of the transformer. It may include one or more.

Specifically, the sensor unit (the IoT smart sensor for the transformer (200_TR)), ⅰ) the voltage on the secondary side of the transformer (1 phase) from a voltage sensor (not shown) and a current sensor (not shown) installed on the external secondary terminal of the transformer. ) And current (3-phase) can be used to obtain the load factor and voltage of the transformer, and ii) the internal pressure of the transformer can be obtained from a pressure sensor (not shown) installed inside the transformer, and ⅲ) The temperature of the insulating oil existing inside the transformer can be obtained from a temperature sensor (not shown) installed therein, and iv) generated during partial discharge in the inner winding of the transformer from the ultraviolet sensor (UV-C) installed inside the transformer. It is possible to obtain information about ultraviolet rays according to the arc, and iii) the transformer formed due to collision with an external object from the acceleration sensor and the tilt sensor installed inside the transformer or inside the body (housing) of the sensor unit 200. Degrees and slopes can be obtained. Ⅵ) The concentration of hydrogen, which is a combustible gas that occurs when insulating paper or insulating oil is decomposed by internal arc discharge of a transformer, is obtained from a gas sensor (eg, CNT gas sensor) installed inside the transformer. can do.

As will be described later, the analysis unit 300 sets the load rate, voltage, load current, internal pressure, insulation oil temperature, ultraviolet light information, acceleration, slope, and internal hydrogen concentration of the transformer obtained by the sensor unit 200 in advance. Based on the complex utilization, the state of the transformer can be analyzed by type, and a detailed description will be described later.

Meanwhile, the state information of the power device 100 obtained by the sensor unit 200 is state information of the switch, and may include one or more of a leakage current, an elbow temperature, an acceleration, and a slope of the switch.

Specifically, the sensor unit (the IoT smart sensor for the switchgear (200_SW)), ⅰ) the switch of the switch from the current sensor installed in two places of the ground wire of the switchgear (between the grounding terminal and grounding copper of the switchgear, and between the grounding copper and the grounding rod connecting terminal). The leakage current can be obtained, and ii) the surface temperature of the elbow of the switch can be obtained from the temperature sensor installed on the elbow of the switchgear, and iv) the acceleration installed inside the switchgear or inside the body (housing) of the sensor unit 200. Acceleration and tilt of the switch formed by collision with an external object can be obtained from the sensor and the tilt sensor.

As will be described later, the analysis unit 300 may analyze the state of the switchgear by type by using the leakage current, elbow temperature, acceleration, and slope of the switchgear obtained by the sensor unit 200 in detail, and detailed description will be described later. do.

When the IoT smart sensor 200_TR for the transformer is installed in the transformer, the sensor node 210 and the sensor unit (through the coupler attached to the pressure relief valve of the transformer as shown in FIG. 2 so as to be installed in the transformer in an uninterrupted state) The body of the 200) (having a control unit 220 and a communication unit 230) may be installed in a transformer, and the IoT smart sensor 200_TR for the transformer and the IoT smart sensor 200_SW for the switch are respectively transformers. And a structure and shape that does not involve a truce when installed in the switchgear.

The sensor unit 200 may operate by receiving external power under normal operating conditions, and may have internal power (eg, a built-in battery) built in in case the external power cannot be supplied due to a power failure. have. Accordingly, the control unit 220 of the sensor unit 200 monitors the supply state of the external power, and when the external power, such as loss of external power, cannot be supplied, the supply power can be switched to secure power through the internal power. have.

Meanwhile, the control unit 220 of the sensor unit 200 may transmit the self-diagnosis result information of the sensor unit 200 together with the status information of the power device 100 to the analysis unit 300 through the communication unit 230. . That is, the control unit 220 is a sensor for sensing the loss of external power and the status information of the power device 100 (voltage sensor, current sensor, temperature sensor, pressure sensor, ultraviolet sensor, gas sensor, acceleration sensor, Tilt sensor) Self diagnosis may be performed to diagnose an abnormality of itself, and the result of self diagnosis may be transmitted to the analysis unit 300. Accordingly, the analysis unit 300 may analyze the state of the sensor unit 200 for each type by applying a state determination algorithm to the self-diagnosis result information of the sensor unit 200 transmitted from the sensor unit 200. The description will be described later. The F / W set in the control unit 220 of the sensor unit 200 performing the above-described functions may be updated remotely by user manipulation of the integrated operation unit 400 described later.

The analysis unit 300 analyzes the state of the power device 100 by applying a preset state determination algorithm to the state information of the power device 100 transmitted from the sensor unit 200, and based on the analysis result, the power device ( It is possible to determine the current state of 100) or predict the failure state of the power device 100. In addition, the analysis unit 300, the status information of the power device 100 received from the sensor unit 200, and the analysis results for the state of the power device 100 (that is, the current state or prediction of the power device 100) The fault condition (failure / abnormality) may be transmitted to the integrated operation unit 400. The analysis unit 300 may be implemented as an analysis server in which a state determination algorithm is set.

The integrated operation unit 400 controls the operation of the sensor unit 200 and the analysis unit 300 based on the user's manipulation, and for monitoring the operating state of the user's power device 100 (that is, the user uses power In order to monitor the operating state of the device 100, the state information of the power device 100 and the analysis result of the state of the power device 100 may be input and output from the analysis unit 300. That is, the integrated operation unit 400 displays a user interface screen for controlling the operation of the sensor unit 200 and the analysis unit 300, and a monitoring screen for the states of the power device 100 and the sensor unit 200. It can perform the interfacing role provided.

Based on the above, the process of analyzing the states of the power device 100 and the sensor unit 200 will be described in detail focusing on the operation of the analysis unit 300.

First, a process of analyzing the state information of the transformer transmitted from the sensor unit 200 by the analysis unit 300 will be described.

The analysis unit 300 may analyze the state of the transformer by type by using the state information of the transformer in a complex manner based on the state determination algorithm. Here, the type may include one or more of a short circuit of the transformer, a broken wire, a collision with an external object, an overload condition, an unbalanced load condition, exceeding a prescribed rated utilization rate, out of a preset voltage maintenance range, an insulation oil temperature abnormality, and an internal pressure abnormality. It can contain. An example of a state determination algorithm applied by the analysis unit 300 to analyze the state of the transformer by type using the state information of the transformer will be described as follows.

Ⅰ) Winding short-circuit: When the temperature of the insulating oil has increased by more than the set temperature (eg 15 ℃) from the current time compared to the previous set time (eg 1 hour), and the internal pressure is greater than the set temperature (eg 60 ℃). If the set rate (eg 10%) increases more than the set time (eg 1 hour), it is judged that the winding short circuit is suspected. Alternatively, if the voltage of the transformer rises above the set voltage (eg, 300V), it is determined that the winding short circuit is suspected. The set time, set temperature amount, set temperature, set rate, and set voltage may be set in the analysis unit 300 by user manipulation of the integrated operation unit 400.

Ii) Winding disconnection: If the voltage of the transformer falls below the set voltage (eg 190V), it is judged that the winding disconnection is suspected. Or, when the current of any one phase of the transformer is within the set rate (for example, 2%) of the rated current and is less than the minimum current during a certain period from the current time to the set period (for example, 30 days), the fixed period If the minimum current during the period is greater than the set current (eg 5A), it is determined that the winding disconnection is suspected. The set voltage, set rate, set period, and set current may be set in the analysis unit 300 by user manipulation of the integrated operation unit 400.

Ⅲ) Collision with external object: If the acceleration (or the amount of impact) of the transformer is higher than the set value and the slope (or the rate of change of the gradient) is greater than the set value, it is determined that there is a collision with the external object. The above-described setting value may be set in the analysis unit 300 by user manipulation of the integrated operation unit 400.

Ⅳ) Overload state: If the load rate exceeds the set load rate over the set time (eg 10 minutes), it is determined that the load is overload. Here, the load factor may be derived according to Equation 1 below.

Here, i ₁ , i ₂ , i ₃ is the secondary side current (3 phase) of the transformer, V is the secondary side voltage (1 phase) of the transformer, the set load factor and the transformer capacity are operated by the user for the integrated operation unit 400 It can be set in the analysis unit 300 by. At this time, it is determined that the voltage V of the transformer is within the voltage maintenance range, which will be described later, and is overloaded only when the load factor according to Equation 1 exceeds the set load factor over a set time.

Ⅴ) Load unbalanced state: If each phase current of the transformer exceeds the rated current for more than the set time (eg 10 minutes) and the unbalanced rate exceeds the set unbalanced rate, it is judged that the load is unbalanced. Here, the unbalance rate can be derived according to Equation 2 below.

Here, here, i ₁ , i ₂ , i ₃ are the secondary currents (three phases) of the transformer, and MAX, MIN, and Average are the maximum value operator, the minimum value operator, and the average value operator, respectively. The set unbalance rate may be set in the analysis unit 300 by the user's manipulation of the integrated operation unit 400.

초과) Exceeding the specified rating utilization rate: If the utilization rate during the period from the current point of time until the set period (eg 1 month) exceeds the setting utilization rate, it is judged that the rating utilization rate is exceeded. Here, the utilization rate may be derived according to Equation 3 below.

Here, P _i is the power consumption for each time (i), and the set utilization rate and the rated capacity may be set in the analysis unit 300 by the user's manipulation of the integrated operation unit 400.

Ⅶ) Out of the preset voltage maintenance range: If the voltage of the transformer deviates from the preset voltage maintenance range, that is, the voltage of the transformer is less than or exceeds the lower limit of the voltage maintenance range, the voltage is out of the maintenance range (low voltage state or Overvoltage condition). The voltage maintenance range may be set in the analysis unit 300 by user manipulation of the integrated operation unit 400.

이상) Over insulation oil temperature: If the insulation oil temperature of the transformer is higher than the reference temperature by the set temperature (eg 40 ℃), the insulation oil temperature is greater than the set temperature (eg 60 ℃), and the insulation oil temperature is the set time from the current time. (Example: 5 minutes) If it exceeds one or more of the set temperature (eg 5 ℃) compared to the previous one, it is judged that the temperature is higher than the insulation oil. The above-described reference temperature, set temperature amount, set temperature, and set time may be set in the analysis unit 300 by user manipulation of the integrated operation unit 400.

Ⅸ) Abnormal internal pressure: If the internal pressure of the transformer is outside the preset pressure range, it is determined that the internal pressure is abnormal. The pressure range may be set in the analysis unit 300 by the user's manipulation of the integrated operation unit 400.

Each type of the state judgment algorithm may be set in importance for each type. In other words, winding shorts, winding breaks, and collisions with external objects can be set to the importance of 'critical', overload conditions, unbalanced load conditions, exceeding the specified rated utilization rates, out of the voltage maintenance range, over insulating oil temperature and over pressure May be set to the importance of 'interest'.

Next, a process of analyzing the status information of the switch transmitted from the sensor unit 200 by the analysis unit 300 will be described.

The analysis unit 300 may analyze the status of the switchgear by type by using the status information of the switchgear based on the status determination algorithm. Here, the type may include one or more of an elbow connection material of the switchgear, a collision with an external object, and a leakage current exceeding. An example of a state determination algorithm that is applied by the analysis unit 300 to analyze the state of the switch by type using the state information of the switch will be described as follows.

이상) Abnormal elbow connection material: If the elbow temperature of the switchgear is higher than the set temperature (eg 10 ℃) above the standby temperature, it is considered as an elbow connection abnormality. Alternatively, when the elbow temperature of a specific phase is higher than the elbow temperature of the other phases in the same circuit by a set temperature (eg, 5 ° C) or higher, the elbow connection material is determined to be abnormal. The above-described set temperature and set time may be set in the analysis unit 300 by user manipulation of the integrated operation unit 400.

Ii) Collision with the external object: If the acceleration (or the amount of impact) of the switch is higher than the set value and the slope (or the rate of change of the gradient) is greater than the set value, it is determined that there is a collision with the external object. The above-described setting value may be set in the analysis unit 300 by user manipulation of the integrated operation unit 400.

초과) Leakage current exceeded: If the leakage current of the switch exceeds the set current (eg 3000mA) for more than the set time (eg 5 minutes), it is judged that the leakage current is exceeded. Alternatively, if the leakage current increases by more than the set value (eg, 50%) compared to the highest value among the measured values up to the present, it is determined that the leakage current is exceeded. The set current, set time, and set rate may be set in the analysis unit 300 by user manipulation of the integrated operation unit 400.

Each type of the state judgment algorithm may be set in importance for each type. That is, the elbow connection material abnormality, the collision with the external object may be set to the importance of 'critical', and the leakage current excess may be set to the importance of 'general'.

Meanwhile, as described above, the control unit 220 of the sensor unit 200 analyzes the self-diagnosis result information of the sensor unit 200 together with the status information of the power device 100 through the communication unit 230. You can also send to That is, the control unit 220 may perform self-diagnosis to diagnose the loss of external power and abnormality of the sensor itself, and transmit the self-diagnosis result information to the analysis unit 300. The self-diagnosis result information may include information on whether or not to switch the supply power from the external power supply to the internal power supply due to the loss of the external power supply, and information on whether the status information value from each sensor is abnormal.

Accordingly, the analysis unit 300 applies a state determination algorithm to the self-diagnosis result information of the sensor unit 200 transmitted from the sensor unit 200 to analyze the state of the sensor unit 200 by type and analyzes the analysis result. It can be delivered to the integrated operating unit 400. Here, the type may include one or more of an abnormality of the power of the sensor unit 200, an abnormality of the sensor itself sensing state information of the power device 100, and an abnormality of the communication unit 230. An example of a state determination algorithm applied by the analysis unit 300 to analyze the state of the sensor unit 200 by type using the self-diagnosis result information of the sensor unit 200 will be described as follows.

Ⅰ) Power failure: When the power supply is switched from external power to internal power, or when the voltage of the power supply to the sensor unit 200 is less than the set voltage (eg, 110V), the power supply of the sensor unit 200 is abnormal. I judge that. The set voltage may be set in the analysis unit 300 by a user's manipulation of the integrated operation unit 400.

Ii) Abnormality of the sensor itself: If the state information value obtained from each sensor, obtained through the sensor node 210 of the sensor unit 200, is outside the measurement range of the sensor, it is determined that the sensor itself is abnormal (eg, temperature) The resistance value of the sensor is 0.01 Ω or less).

Ⅲ) Abnormality of the communication unit 230: If communication with the sensor unit 200 is not performed for a set time (for example, 10 minutes), it is determined that the communication unit 230 of the sensor unit 200 is abnormal. The above-described setting time may be set in the analysis unit 300 by user manipulation of the integrated operation unit 400.

Each type of the state judgment algorithm may be set in importance for each type. That is, the power failure may be set as the importance of the 'critical', and the abnormality of the sensor itself and the communication unit 230 may be set as the importance of the 'general'.

According to the state determination algorithm described above, the state of the power device 100 or the state of the sensor unit 200 may be analyzed by the analysis unit 300, and as a result of the analysis, the state information or sensor unit of the power device 100 When the self-diagnosis result information of (200) satisfies the event occurrence condition according to the state determination algorithm (i.e., ⅰ of the state determination algorithm for the transformer described above) to ⅸ), 의 of the state determination algorithm for the switchgear ) To ⅲ), or ⅰ) to ⅲ) of the state determination algorithm for the sensor unit 200) may generate an event alarm. At this time, it may be determined whether or not an event alarm is generated according to the importance of each status determination algorithm. For example, an event alarm may be generated only when an event occurrence condition according to the status determination algorithm corresponding to 'critical' is satisfied. When an event alarm occurs by the analysis unit 300, the integrated operation unit 400 may output an alarm message visually or audibly to the user.

Meanwhile, as described above, the sensor unit 200 may transmit status information of the power device 100 to the analysis unit 300 according to a preset transmission condition. Specifically, the sensor unit 200 transmits the status information of the power device 100 according to a predetermined period (the integrated operation unit 400 may be input from the user and set in the analysis unit 300) according to the transmission condition. However, when the state information of the power device 100 satisfies the event occurrence condition according to the state determination algorithm, the state information of the power device 100 can be immediately transmitted (for this, the control unit 220 of the sensor unit 200 is also provided). Status determination algorithm may be set). In addition, when the state information of the power device 100 satisfies the event occurrence condition according to the state determination algorithm, the sensor unit 200 may employ various methods such as an instantaneous event alarm (visual or audible alarm) in the field. Can be generated).

In addition to the instantaneous event alarm in the field by the sensor unit 200, the analysis unit 300 determines the state information of the power device 100, accumulates the state information of the power device 100, and analyzes time series trends. When the trend threshold is exceeded, a trend event alarm can be generated. For example, for the load factor of the transformer, the load factor of the transformer is continuously accumulated and the time series trend is analyzed to determine the trend reference value (eg, the cumulative average value of the load factor and the trend reference value are determined by the integrated operation unit 400) and the analysis unit 300 ), When the currently determined load ratio of the transformer exceeds the trend reference value, the analysis unit 300 may generate a trend event alarm. When a trend event alarm occurs by the analysis unit 300, the integrated operation unit 400 may visually or audibly output the trend alarm message and provide it to the user. Since the trend event alarm reflects time-series analysis of each state information of the power device 100, the user can determine the failure indication of the power device 100 through the trend alarm message output through the integrated operation unit 400 It becomes possible.

The integrated operation unit 400 updates (changes) the event occurrence condition of the state determination algorithm set in the sensor unit 200 and the analysis unit 300 and the trend reference value set in the analysis unit 300 based on the user's manipulation. It might be.

On the other hand, the communication between the sensor unit 200 and the analysis unit 300, a wireless method (for example, 900MHz band) of LoRaWAN (Long Range Wide Area Network) and the optical network-based communication method may be applied. At this time, in order to reduce power consumption and memory capacity, a Constrained Application Protocol (CoAP) protocol defined in IETF RFC 7252 may be applied. 3 shows an example of a communication network configuration method between the sensor unit 200 and the communication unit 230. The sensor unit 200 is connected to the gateway installed in the power device 100 through LoRaWAN, and the gateway can be connected to the analysis unit 300 through a network management system (NMS) through an optical network. FIG. 3 (a) shows an example of using a spare core of an optical cable, and FIG. 3 (b) shows an example of sharing an optical core of a conventional power distribution system (DAS) because there is no spare core of the optical cable. Is showing.

On the other hand, the power device operating system according to the present embodiment, as shown in Figure 1, the existing distribution power zone monitoring system (including the distribution power zone monitoring server 10) and manhole monitoring system (underground cable environmental management server 20) Including). That is, the sensor unit 200 and the analysis unit 300 of the present embodiment are implemented as a ground device monitoring system that analyzes each state of a transformer and a switch, and the integrated operating unit 400 is a ground device monitoring system and a distribution power tool monitoring system. And as a high-level control device of the manhole monitoring system, it can be implemented as a 'ground machine comprehensive monitoring system (or underground facility integrated operation system)', so that the user can integrally monitor the operation status of the entire underground facility through the integrated operation unit 400. . The platform structure of the OneM2M method may be employed to expand the function of the analysis unit 300 and easily connect with other systems. 4 shows an example of an interface screen (that is, a user UI) provided to the user by the integrated operation unit 400 as an integrated operation system for underground facilities, and FIG. 5 shows an example of a framework of the power device operating system of this embodiment. 5 (in FIG. 5, the IU-Gaurd and ground device comprehensive monitoring system corresponds to the analysis unit 300 and the integrated operation unit 400 of the present embodiment).

The user UI provided to the user by the integrated operation unit 400 may be composed of five main screens of dashboard, event, system control, resource management, and data analysis, and Table 1 below shows examples of main functions for each screen .

Main screen main function
Dashboard -Real-time monitoring of overall operation status (display of equipment status on the map)
-Selective event alarm popup according to importance
-Event overview display
Event management -Event search (search for non-action history, period, condition)
-Enter the action result for the event
-Inquiries about events (user condition support)

System control -Remote setting function for the analysis unit, sensor unit, and gateway (Improved workforce efficiency by remotely controlling the event occurrence conditions of the sensor unit and optimized according to facility characteristics)
-Set the status judgment algorithm of the analysis section (set the criteria of the analysis section to analyze the long term of the power device through historical data analysis)
Resource management -Device (transformer, switch, gateway, sensor) registration
-Upper system interworking and system registration
-Management of specifications and operation information
Data analysis -Diagnosis of current operation status of power equipment
-Diagnosis of current operation status of sensor and gateway
-Analysis and diagnosis of power device operation trends

6 is a flowchart illustrating a method of operating a power device according to an embodiment of the present invention.

As illustrated in FIG. 6, a method for operating a power device according to an embodiment of the present invention may include a sensing step (S100), an analysis step (S200), a monitoring step (S300), and an updating step (S400).

First, the sensor unit 200 acquires state information of the power device 100 for distribution and transmits it to the analysis unit 300 according to a preset transmission condition (S100). Here, the state information of the power device 100 is the state information of the transformer, and may include one or more of a load factor, voltage, load current, internal pressure, insulation oil temperature, ultraviolet information, acceleration, slope, and internal hydrogen concentration of the transformer, , Also, as the status information of the switch, may include one or more of the leakage current, elbow temperature and acceleration of the switch.

In step S100, the sensor unit 200 transmits the state information of the power device 100 according to the transmission condition, according to a preset cycle, the state information of the power device 100 is an event occurrence condition according to the state determination algorithm If it satisfies, it may immediately transmit the status information of the power device 100, in this case, the sensor unit 200 may generate an instantaneous event alarm. In addition, the control unit 220 of the sensing unit may transmit the self-diagnosis result information of the sensor unit 200 together with the status information of the power device 100 to the analysis unit 300 through the communication unit 230.

Next, the analysis unit 300 analyzes the state of the power device 100 by applying a preset state determination algorithm to the state information of the power device 100 transmitted from the sensor unit 200, and based on the analysis result The current state of the power device 100 is determined or the failure state of the power device 100 is predicted (S200).

In step S200, the analysis unit 300 analyzes the state of the transformer by type using a combination of state information of the transformer based on the state determination algorithm, but the type is a winding short of the transformer, a winding break, and collision with an external object , Overload condition, load unbalance condition, exceeding a prescribed rated utilization rate, out of a preset voltage maintenance range, an insulation oil temperature abnormality, and an internal pressure abnormality.

In addition, in step S200, the analysis unit 300 analyzes the state of the switchgear by type using a combination of the status information of the switchgear based on the status determination algorithm, wherein the type is an elbow connection material abnormality of the switchgear, a collision with an external object , And leakage current exceeding.

In addition, in step S200, the analysis unit 300 analyzes the state of the sensor unit 200 by type by applying a state determination algorithm to the self-diagnosis result information of the sensor unit 200 transmitted from the sensor unit 200, and The result of the analysis is transmitted to the integrated operation unit 400, but the type is one or more of a power failure of the sensor unit 200, an abnormality of the sensor itself sensing state information of the power device 100, and an abnormality of the communication unit 230. It may include.

Since the analysis process of the analysis unit 300 based on the state determination algorithm is the foregoing, detailed description is omitted.

According to the above-described analysis process, in step S200, the analysis unit 300 is an event when the status information of the power device 100 or the self-diagnosis result information of the sensor unit 200 satisfies the event occurrence condition according to the state determination algorithm It can also generate an alarm.

Furthermore, in step S200, the analysis unit 300 may generate a trend event alarm when the state information of the power device 100 is accumulated and the time series trend is analyzed to exceed the determined trend threshold.

After step S200, the integrated operation unit 400 analyzes the state information of the power device 100 and the analysis result of the state of the power device 100 to monitor the operating state of the user's power device 100 (300) ) And outputs it (S300).

Subsequently, the integrated operation unit 400 may update the event occurrence conditions set in the sensor unit 200 and the analysis unit 300 and the trend reference values set in the analysis unit 300 based on the user's manipulation. (S400).

As described above, the present embodiment is a method of obtaining and analyzing data of the entire life cycle of the power device in a complex manner compared to the conventional power device diagnosis method, which was limited to the diagnosis of the state only at the time of inspection due to the limitation of the range of data that can be secured. It is possible to reduce the human error and the cost of inspection by accurately diagnosing the condition of the power device and removing the inconvenience of manpower inspection, and analyze the secured data in time series to predict the failure in advance to break down the power device. And prevent cost consumption due to unnecessary replacement.

The present invention has been described above with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art to which the art pertains may have various modifications and other equivalent embodiments. You will understand the point. Therefore, the technical protection scope of the present invention will be defined by the claims below.

100: power equipment
200: sensor unit
210: sensor node
220: control unit
230: Communication Department
200_TR: IoT Smart Sensor for Transformer
200_SW: IoT smart sensor for switchgear
300: analysis unit
400: integrated operation
10: distribution power zone monitoring server
20: underground cable environment management server

Claims (24)

A sensor unit that acquires state information of a power device for distribution and transmits it according to a preset transmission condition;
Analyze the state of the power device by applying a preset state determination algorithm to the state information of the power device transmitted from the sensor unit, and determine the current state of the power device based on the analysis result or the failure state of the power device Analysis unit for predicting; And
The operation of the sensor unit and the analysis unit is controlled based on a user's operation, and the state information of the power device and the analysis result of the power device status are monitored for monitoring the operating state of the power device of the user. An integrated operation unit that receives input from the analysis unit and outputs it;
Power device operating system comprising a.
According to claim 1,
The power device includes a transformer,
The state information of the power device is the state information of the transformer, characterized in that it includes at least one of the load rate, voltage, load current, internal pressure, insulation oil temperature, ultraviolet information, acceleration, slope and internal hydrogen concentration of the transformer Power equipment operating system.
According to claim 2,
The analysis unit analyzes the state of the transformer for each type by complexly using the state information of the transformer based on the state determination algorithm. Power equipment operating system, characterized in that it comprises one or more of the state, load unbalanced state, exceeding the specified rated utilization rate, outside the preset voltage maintenance range, the temperature of the insulation oil, and internal pressure.
According to claim 1,
The power device includes a switch,
The state information of the power device, as the state information of the switch, the power device operating system, characterized in that it includes at least one of the leakage current, elbow (elbow) temperature, acceleration and slope of the switch.
According to claim 4,
The analysis unit analyzes the state of the switchgear by type by using the status information of the switchgear based on the status determination algorithm, but the type is an elbow connection material abnormality of the switch, a collision with an external object, and a leakage current Power device operating system comprising at least one of the excess.
According to claim 1,
The sensor unit includes a sensor node that acquires status information of the power device, a communication unit that transmits status information of the power device to the analysis unit, and a control unit that controls the sensor node and the communication unit in cooperation,
The control unit, the power device operating system, characterized in that for transmitting the self-diagnosis result information of the sensor unit with the status information of the power device to the analysis unit through the communication unit.
The method of claim 6,
The analysis unit analyzes the state of the sensor unit by type by applying the status determination algorithm to the self-diagnosis result information of the sensor unit transmitted from the sensor unit, and delivers the analysis result to the integrated operation unit, wherein the type is the sensor. Power supply operating system, characterized in that it comprises at least one of the power supply abnormality, an abnormality of the sensor itself for sensing the state information of the power device, and an abnormality of the communication unit.
The method of claim 7,
The analysis unit, the power device operating system characterized in that when the state information of the power device, or the self-diagnosis result information of the sensor unit satisfies the event occurrence condition according to the state determination algorithm.
The method of claim 6,
The power device includes a transformer,
The sensor unit, a power device operating system, characterized in that installed in the transformer in a structure in which the sensor node and the body of the sensor unit are connected through a coupler installed on the pressure relief side of the transformer.
According to claim 1,
The sensor unit transmits state information of the power device according to the transmission condition according to a preset period, and when the state information of the power device satisfies an event occurrence condition according to the state determination algorithm, the state of the power device Power device operating system characterized in that the information is transmitted immediately.
According to claim 1,
The sensor unit generates an instantaneous event alarm when the state information of the power device satisfies an event occurrence condition according to the state determination algorithm,
The analysis unit generates a trend event alarm when the state information of the power device exceeds a trend threshold determined by accumulating state information of the power device and analyzing time-series trends. system.
The method of claim 11,
The integrated operation unit, based on the user's operation, the sensor unit and the event occurrence conditions set in the analysis unit, and the power unit operating system, characterized in that for updating the trend reference value set in the analysis unit.
A sensing unit, the sensing step of acquiring the status information of the power device for power distribution and transmitting according to a preset transmission condition;
The analysis unit analyzes the state of the power device by applying a preset state determination algorithm to the state information of the power device transmitted from the sensor unit, and determines the current state of the power device based on the analysis result or determines the power device Analysis step of predicting the failure state of the; And
A monitoring step in which the integrated operating unit receives and outputs state information of the power device and an analysis result of the state of the power device from the analysis unit to monitor a user's operation state of the power device;
Power device operating method comprising a.
The method of claim 13,
The power device includes a transformer,
The state information of the power device is the state information of the transformer, characterized in that it includes at least one of the load rate, voltage, load current, internal pressure, insulation oil temperature, ultraviolet information, acceleration, slope and internal hydrogen concentration of the transformer How to operate power equipment.
The method of claim 14,
In the analysis step, the analysis unit,
Based on the state determination algorithm, the state of the transformer is analyzed by type by using the state information of the transformer in combination, but the type is a winding short of the transformer, a winding break, a collision with an external object, an overload condition, and load imbalance A method of operating a power device, comprising one or more of a condition, exceeding a specified rated utilization rate, exceeding a preset voltage maintenance range, an insulation oil temperature abnormality, and an internal pressure abnormality.
The method of claim 13,
The power device includes a switch,
The state information of the power device, the state information of the switch, the leakage current of the switch, elbow (elbow) temperature and acceleration, characterized in that it includes at least one of the power device operating method.
The method of claim 16,
In the analysis step, the analysis unit,
Based on the status determination algorithm, the status of the switch is analyzed by type using a combination of the status information of the switch, but the type is one or more of an abnormality in elbow connection of the switch, collision with an external object, and leakage current excess Power device operating method comprising a.
The method of claim 13,
The sensor unit includes a sensor node that acquires status information of the power device, a communication unit that transmits status information of the power device to the analysis unit, and a control unit that controls the sensor node and the communication unit in cooperation,
In the sensing step, the control unit,
A method of operating a power device, characterized in that the self-diagnosis result information of the sensor part is transmitted to the analysis part through the communication part together with the state information of the power device.
The method of claim 18,
In the analysis step, the analysis unit,
The state determination algorithm is applied to the self-diagnosis result information sent from the sensor unit to analyze the state of the sensor unit by type, and the analysis results are transmitted to the integrated operation unit. Method of operating a power device, characterized in that it comprises at least one of the abnormality of the sensor itself and the communication unit for sensing the state information of the power device.
The method of claim 19,
In the analysis step, the analysis unit,
The analyzing unit, the power device operating method, characterized in that when the status information of the power device, or the self-diagnosis result information of the sensor unit satisfies the event occurrence condition according to the state determination algorithm.
The method of claim 18,
The power device includes a transformer,
The sensor unit, a power device operating method characterized in that it is installed in the transformer in a structure in which the sensor node and the body of the sensor unit are connected through a coupler installed on the pressure relief side of the transformer.
The method of claim 13,
In the sensing step, the sensor unit,
According to the transmission condition, the state information of the power device is transmitted according to a preset period, and when the state information of the power device satisfies an event occurrence condition according to the state determination algorithm, the state information of the power device is immediately transmitted. Power device operating method characterized in that.
The method of claim 13,
In the sensing step, the sensor unit,
When the state information of the power device satisfies the event occurrence condition according to the state determination algorithm, an instantaneous event alarm is generated,
In the analysis step, the analysis unit,
A method of operating a power device, characterized in that when the state information of the power device exceeds the trend threshold determined by accumulating the state information of the power device and analyzing a time series trend, a trend event alarm is generated.
The method of claim 23,
The integrated operation unit, based on the operation of the user, the sensor unit and the event occurrence conditions set in the analysis unit, and updating step of updating the trend reference value set in the analysis unit; characterized in that it further comprises a How to operate power equipment.

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