KR101516776B1 - Apparatus for diagnosing grounding system, method for operating the same and diagnosing system having the same - Google Patents

Abstract

The present invention relates to an apparatus and a method for diagnosing a grounding system. The apparatus for diagnosing a grounding system comprises: a ground electrode measuring unit for applying a measurement frequency and a measurement current generated from a signal generator to a ground electrode, and measuring a ground electrode decision value including at least one among a current returning from the ground electrode, a first ground current, and a ground voltage; a safety voltage measuring unit for applying the measurement frequency and the measurement current generated from the signal generator to the ground electrode and a plurality of voltage measurement terminals installed on an inside and an outside of the ground electrode, and measuring a safely voltage including a contact voltage and a step voltage of the grounding system using current values returning from the ground electrode and the voltage measurement terminals; and a processing unit for comparing and monitoring the ground electrode decision value, a ground electrode threshold value, and the safety voltage and a reference safety voltage, and transmitting monitoring information to a grounding system diagnosis server through a communication unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounding system diagnosis apparatus, a method of operating the same,

The present invention relates to an apparatus and method for diagnosing a grounding system, and more particularly, to a system and method for diagnosing a grounding system that diagnoses and monitors the grounding system in real time and automatically, and notifies an abnormality to the grounding system .

Recently, the occurrence of lightning has been greatly increased due to the effects of climate change and warming. As a result of the development of super high-speed integrated information communication and the breakthrough of electric, electronic and equipment technology, various communication, power and control systems are used for noise signal and surge It became very vulnerable. Accordingly, the importance of the grounding system for preventing such damage is gradually increasing. In other words, a high-performance grounding system eliminates transient surges, anomalous signals, and sudden noise currents, and can prevent damage by proactively monitoring problems that may occur through ongoing monitoring of the grounding system.

Accordingly, there is a need for performance and diagnosis of a grounding system that can determine whether such a grounding system is operating normally. Conventionally, in order to confirm the performance of such a grounding system, a surge protection device (SPD), and a lightning-proof ground, a method of directly measuring or recording by using a visual inspection or a separate device whenever a user needs is used . However, such a performance evaluation method is troublesome and time-consuming because the user is carried out directly to the grounding system. In addition, even when a damage or malfunction of the equipment occurs due to a performance abnormality or a grounding problem, there is a problem that it is relatively difficult to grasp the cause or condition thereof.

In this connection, there is Korean Patent Publication No. 2012-0095757, entitled " Pulse-driven Grounding Performance Analyzer ".

The present invention provides a grounding system diagnosis apparatus and method capable of predicting the life time of the ground electrode according to the resistance, performance and performance of the grounding system in real time, measuring the state of the surge protector, and measuring and managing the safety voltage It has its purpose.

It is another object of the present invention to provide a grounding system diagnosis apparatus and method which can perform remote and automatic measurement instead of directly moving and measuring a user every place where measurement of safety voltage is required.

According to an aspect of the present invention, there is provided a system for diagnosing a ground system, the apparatus comprising: a grounding electrode for applying a measurement frequency and a measurement current generated through a signal generator to a ground electrode; A ground electrode measuring unit for measuring a ground electrode judging value including at least one of a ground voltage and a ground voltage; The measurement frequency and the measurement current generated through the signal generator are applied to the ground electrode and a plurality of voltage measurement terminals provided inside and outside the ground electrode and the current value returned from the ground electrode and the plurality of voltage measurement terminals A safety voltage measuring unit for measuring a safety voltage including a contact voltage and a stride voltage of the grounding system; And a processing unit for comparing and monitoring the ground electrode determination value and the ground electrode threshold value, the measured safety voltage and the reference safety voltage, and transmitting the monitoring information to the grounding system diagnosis server through the communication unit.

In addition, the safety voltage measuring unit may apply the measurement frequency and the measurement current to the ground electrode and a plurality of voltage measurement terminals through a CT (Current Transformer) having a frequency band of 40 Hz to 100 kHz.

The safety voltage measuring unit may calculate the contact voltage through the voltage difference between the ground electrode and the voltage to the plurality of voltage measurement terminals and the ground voltage.

The safety voltage measuring unit may calculate the stride voltage through the voltage difference between the ground electrode and the voltage measuring terminals and the ground voltage, and the voltage difference between the ground electrode and the plurality of voltage measuring terminals.

Further, the grounding system diagnosis apparatus of the present invention may further include a surge protector measuring unit for measuring a leakage current flowing through a surge protector ground line connected to a surge protection device (SPD), and the processing unit may include a leakage Surge protector (SPD) by comparing the normal leakage current when the current and the surge protector (SPD) are in a normal state and the abnormal leakage current when the surge protector (SPD) is in an abnormal state .

In addition, when the abnormality is found in at least one of the ground system, the safety voltage, and the surge protector, the processing unit can transmit the abnormality information to the grounding system diagnosis server through the communication unit.

Further, the grounding system diagnosis apparatus of the present invention measures lifetime derivation data including the second ground current to the ground electrode, the ground resistivity to the ground, and the amount of chemical ions on the earth, and calculates the corrosion rate And the processing unit can estimate the lifetime and performance of the ground electrode based on the corrosion rate.

In addition, the grounding system diagnosis apparatus of the present invention may further include a warning unit for notifying an abnormality to the manager through a display or a speaker when an abnormality is detected in at least one of the ground system, the safety voltage, and the surge protector through the processing unit.

The plurality of voltage measurement terminals may include internal probe terminals located inside the ground electrode and external probe terminals located outside the ground electrode.

The ground electrode measuring unit may measure the voltage through a current fed back from the ground electrode, calculate the ground resistance based on the measured voltage, and measure the first ground current flowing through the ground line through the CT.

Further, the ground electrode measuring unit can calculate the ground voltage by calculating the grounding resistance and the first grounding current.

According to another aspect of the present invention, there is provided a method of operating a grounding system diagnostic apparatus, including: applying a measurement frequency and a measurement current generated by a grounding electrode measurement unit to a grounding electrode; Measuring a grounding electrode determination value including at least one of a grounding resistance, a first grounding current, and a grounding voltage through a current returned from the grounding electrode by the grounding electrode measuring unit; Applying a measurement frequency and a measurement current generated through the signal generation unit to a plurality of voltage measurement terminals provided inside and outside the ground electrode and the ground electrode by the safety voltage measurement unit; Measuring a safety voltage including a contact voltage and a stratified voltage of the ground system through a grounded electrode and a current value returned from a plurality of voltage measurement terminals by the safety voltage measurement unit; And a processing unit for comparing and monitoring the ground electrode determination value and the ground electrode threshold value, the safety voltage, and the reference safety voltage, and transmitting the monitoring information to the grounding system diagnosis server through the communication unit.

The step of applying the measurement frequency and the measurement current generated through the signal generation unit to the ground electrode and the plurality of voltage measurement terminals may be performed through CT having a frequency band of 40 Hz to 100 kHz.

In the step of measuring the safety voltage, the contact voltage may be calculated through a voltage difference between a ground electrode and a voltage to a plurality of voltage measurement terminals and a ground voltage.

The step of measuring the safety voltage may include calculating a step voltage through a voltage difference between a ground electrode and a voltage of the plurality of voltage measurement terminals and a ground voltage and a voltage difference between the ground electrode and a plurality of voltage measurement terminals .

According to the present invention, there is provided a method of operating a grounding system diagnosis apparatus, comprising the steps of: measuring a leakage current flowing through a surge protector ground line in a surge protector by a surge protector measurement section; By comparing the normal leakage current when the current and the surge protector (SPD) are in a normal state and the abnormal leakage current when the surge protector (SPD) is in an abnormal state, it is further judged whether or not the surge protector (SPD) .

Further, in the method of operating the grounding system diagnosis apparatus of the present invention, the life history data including the second ground current to the ground electrode, the ground resistivity to the ground, and the amount of chemical ions on the earth are measured, Further comprising calculating a corrosion rate for the ground electrode based on the data and further estimating the lifetime and performance for the ground electrode based on the corrosion rate by the processing unit.

The step of measuring the ground electrode determination value may include measuring a voltage through a current fed back from the ground electrode, calculating a grounding resistance based on the measured voltage, and measuring a first grounding current flowing through the grounding line through the CT .

In the step of measuring the ground electrode judgment value, the ground voltage can be calculated by calculating the grounding resistance and the first grounding current.

According to an aspect of the present invention, there is provided a diagnosis system comprising: a grounding system diagnostic apparatus; And a grounding system diagnostic server for monitoring and managing the grounding system diagnostics device and a plurality of other grounding system diagnostic devices by receiving monitoring information transmitted from the grounding system diagnosis device and monitoring information transmitted from a plurality of other grounding system diagnostics devices .

According to the apparatus and method for diagnosing the grounding system of the present invention, it is possible to predict the life of the grounding electrode due to the resistance, performance and degradation of the grounding system in real time, to measure the state of the surge protector, It is effective.

Further, according to the apparatus and method for diagnosing a grounding system of the present invention, it is possible to diagnose the grounding system automatically, rather than manually installing and measuring the apparatus every time the grounding system is measured.

Also, according to the apparatus and method for diagnosing a grounding system of the present invention, it is possible to measure and monitor the grounding resistance, the grounding potential, the grounding performance, and the grounding life expectancy of the grounding system for maintaining safety and performance of life and equipment.

In addition, according to the apparatus and method for diagnosing a grounding system of the present invention, it is possible to measure, monitor, and manage the safety voltage, that is, the stride voltage and the contact voltage, which are essential for safety when an electric accident and a lightning surge occur.

In addition, according to the apparatus and method for diagnosing a grounding system of the present invention, data measured through a grounding system, a safety voltage and a surge protection facility is stored and stored. In case of abnormality, the abnormality information is notified to the manager in real time, There is a possible effect.

1 is a diagram illustrating a diagnostic system in accordance with an embodiment of the present invention.
2 is an enlarged view of a portion A in Fig.
3 is a block diagram of a grounding system diagnostic apparatus according to an embodiment of the present invention.
4 is a flowchart of a method of diagnosing a ground system according to an embodiment of the present invention.

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Hereinafter, a diagnostic system 1000 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram illustrating a diagnostic system in accordance with an embodiment of the present invention. 2 is an enlarged view of a portion A in Fig. 1, a diagnostic system 1000 in accordance with an embodiment of the present invention may include a ground system diagnostic device 100, a ground system diagnostic server 200, and an emergency alert device 300 have. Descriptions of each configuration included in the diagnostic system 1000 according to an embodiment of the present invention are described below.

The grounding system diagnosis server 200 according to an exemplary embodiment of the present invention may be connected to a plurality of grounding system diagnostic apparatuses to perform central monitoring based on information transmitted from a plurality of grounding systems. Specifically, the grounding system diagnostic server 200 can monitor and manage a plurality of different grounding system diagnostic devices by receiving monitoring information transmitted from a plurality of different grounding system diagnostic devices as described below.

The grounding system diagnosis apparatus 100 according to an embodiment of the present invention monitors real-time performance and status of the grounding system, the safety voltage, and the surge protector, As shown in FIG. That is, the diagnostic system 1000 of the present invention can monitor and diagnose the grounding system at a long distance through the grounding system diagnosis apparatus 100. Specifically, the grounding system diagnosis apparatus 100 included in the diagnostic system 1000 determines whether or not the grounding system is abnormal by comparing the measured values with predetermined thresholds for diagnosis and monitoring of the grounding system, It is possible to transmit the abnormality to the grounding system diagnosis server 200 through the Internet network, the wireless network, the Ethernet RS 485, or the like.

If an error occurs in the grounding system, the grounding system diagnosis apparatus 100 may notify the manager through the warning unit included in the grounding system diagnosis apparatus 100 or the emergency notification apparatus 300. Here, the warning unit and the emergency notification device 300 can perform notifications in various ways such as, for example, a configuration such as a speaker or a display, a message method such as SMS or MMS, and a smartphone app.

This description of the grounding system diagnostic apparatus 100 is made in more detail with reference to FIG. Fig. 2 shows an embodiment in which the grounding system diagnosis apparatus 100 of the present invention is installed in a building 10. Fig. It is assumed that a grounding facility 20, a power facility, a communication facility, a control facility, and a plurality of surge protectors (SPDs 31, 32, and 33) are installed in the building 10. As described above, the grounding system diagnostic apparatus 100 of the present invention can perform diagnosis for the grounding facility 20, diagnosis for the safety voltage, and diagnosis for the surge protector 31, 32, 33.

First, a diagnostic method for the grounding facility 20 is described. The earthing system diagnostic apparatus 100 may measure at least one of the earthing resistance to the earthing facility 20, i.e., the earthing electrode, the first earthing current, and the earthing voltage, for diagnosis of the earthing facility 20. [ Here, the grounding resistance, the first grounding current, and the grounding voltage are referred to below as the grounding electrode determination value. The measurement of the ground electrode may be performed by a CT (Current Transformer) and a ground electrode measuring unit described in FIG. In the diagnostic method for the grounding facility 20, the method for measuring the grounding resistance, the first grounding current and the grounding voltage for the grounding electrode is as follows.

In order to measure the grounding resistance, first, the measurement frequency, the measurement current and the measurement data are generated through the signal generator. Thereafter, a measuring current is applied to the ground electrode 20 via CT. Thereafter, the ground electrode measuring unit measures the voltage using the current fed back through the ground electrode 20, and measures the ground resistance through the measured voltage and the current that is returned. In addition, the first ground current is measured by using the CT to measure the current flowing through the ground lines 51, 52, and 53. Here, since the first ground current has various frequencies, the CT should be able to cover this frequency range. Further, the ground voltage can be calculated as a product of the first ground current and the ground resistance measured through CT. That is, the ground voltage can measure the above-described operation of the first ground current and the ground resistance measured through the CT and the ground electrode measuring unit.

When the measurement is completed through the ground electrode measurement unit, the processing unit monitors and diagnoses the ground electrode through comparison of the ground electrode determination value measured through the ground electrode measurement unit and the ground electrode threshold value.

The diagnostic method for the surge protector (SPD, 31, 32, 33) is as follows. A surge protector measurement unit and a CT (81, 82, 83) can be used to diagnose the surge protector (31, 32, 33). That is, the surge protector measuring unit measures the leakage current flowing through the ground lines 81, 82, and 83 connected to the surge protector 31, 32, and 33 through the CTs 41, 42, and 43. The surge protector 31, 32, and 33 can be monitored for abnormal conditions by comparing the leakage current in the normal state and the abnormal leakage current in the abnormal state and the measured leakage current through the processing unit have.

The diagnostic method for the safety voltage is as follows. As described above, the safety voltage is a term including a contact voltage and a stride voltage, and indicates a voltage that can be applied to a human body in contact with the earth. Here, the contact voltage indicates, for example, a voltage applied to the human body when the person comes into contact with the case or the iron tool on the ground. In addition, the stride voltage indicates the voltage that is applied between the ground fault point of the transmission and distribution line or between two feet of the person standing near the ground when the current flows to the ground through the ground system of the electrical equipment.

Therefore, in order to diagnose the safety voltage, these two voltages, that is, the contact voltage and the step voltage, should be separately measured, and the diagnosis should be made based on the result of measurement for each of them. The safety voltage can be measured through the safety voltage measuring unit, CT, and a predetermined number of voltage measuring terminals 61 to 67. [ In this example, the number of voltage measurement terminals is assumed to be seven. It is also assumed that these voltage measurement terminals are installed four (61 to 64) outside the ground system 20 and three (65 to 67) inside the ground system 20. It is assumed that the CT and the safety voltage measuring unit are directly connected to the grounding equipments 20 and 68 to perform the measurement. Here, it is to be understood that the number of these voltage measuring terminals is merely an example, and may be variously changed and installed depending on the situation.

First, the safety voltage measuring unit measures the voltage by applying the measuring frequency and the measuring current generated in the signal generating unit to the ground electrode 68 and the voltage measuring terminals 61 to 67 through the CT. Here, CT includes a band of 40 Hz to 100 kHz. In addition, the reference voltage for the safety voltage represents the above-mentioned ground voltage.

Here, the measurement on the contact voltage calculates the ground voltage and the measured voltage difference when the voltages for the seven voltage measurement terminals 61 to 67 and the ground electrode 68 are measured. Specifically, the contact voltage is calculated by calculating the difference between the voltage to the measurement terminal and the battery electrode existing within the reference separation distance and the ground voltage as the reference voltage.

The measurement of the stride voltage is also performed on the basis of the difference between the voltage for the voltage measurement terminals 61 to 67 and the ground electrode 68 and the ground voltage and for the voltage measurement terminals 61 to 67 and the ground electrode 68 Can be calculated through the voltage difference of < RTI ID = 0.0 > The reason why the stride voltage is divided by the number of two cases is that, for example, when the left leg of the person touches the ground electrode and the right leg is distant from the ground electrode, and both the left leg and the right leg of the person are connected to the ground electrode As shown in FIG. Accordingly, the measurement of the step voltage of the present invention is carried out in consideration of both of the above cases.

When the measurement is completed, the safety voltage is diagnosed through comparison of the contact voltage calculated by the processing section with the reference contact voltage, and comparison of the calculated step voltage and the reference step voltage, that is, can do. The above-described safety voltage measurement is not limited to a case where a current is applied to both the voltage measurement terminals 61 to 67 and the ground electrode 68 to measure the safety voltage. Even if a current is applied to some of these configurations , It is possible to measure the safety voltage.

In addition, the grounding system diagnosis apparatus 100 according to an embodiment of the present invention can monitor the grounding electrode to predict the life and performance deterioration of the grounding electrode. For this prediction, the CT included in the grounding system diagnosis apparatus 100 of the present invention, the voltage measurement terminals 61 through 67, and the measurement sensor for measuring the chemical ions may be used. That is, the grounding system diagnosis apparatus 100 of the present invention can estimate the lifetime and degradation of the grounding electrode by measuring lifetime derivation data including the second ground current, the ground resistivity, and the amount of chemical ions on the ground, . Here, the second ground current represents the DC component current at the ground current flowing to the ground electrode. here. The reason for determining the ground current of the DC component as a determining factor is that the DC current continuously ion-decomposes the ground electrode, which is a metal, so that the ground electrode itself is lost.

The second ground current, the ground resistivity, and the chemical ion amount are measured through the CT, the voltage measurement terminals 61 to 67 and the measurement sensor for measuring the chemical ions, the corrosion rate Can be calculated. That is, the grounding performance measuring unit can predict and monitor the life of the grounding electrode and the deteriorated performance based on the calculated corrosion rate. In addition, such measurements, that is, measurements on lifetime derived data are made in real time, and the actual corrosion rate can be further monitored by analyzing the data measured in real time.

The grounding system diagnosis apparatus 100 of the present invention may further comprise a storage section and may be configured to store the measurement data mentioned above, namely, the grounding resistance for the grounding electrode, the first grounding current and the grounding voltage, the safety voltage, Life leakage data used for predicting the grounding performance, that is, the second ground current, the ground resistivity, and the amount of the chemical ions, can be stored. The data stored in the storage unit can then be used for analysis of the subsequent management and grounding systems.

The communication unit included in the grounding system diagnosis apparatus 100 of the present invention can transmit and receive data through various communication methods such as wireless communication, Ethernet and RS485.

The grounding system diagnosis apparatus 100 according to an embodiment of the present invention may be configured such as a speaker or a display, a message system such as SMS or MMS when it is determined that a problem has occurred in a ground voltage, a safety voltage, a surge protector, , And a smartphone app, in a variety of ways.

Also, the measurement data can be stored and managed in the PC through the communication unit.

Hereinafter, a grounding system diagnosis apparatus 100 according to an embodiment of the present invention will be further described with reference to FIG. 3 is a block diagram of a grounding system diagnostic apparatus 100 according to an embodiment of the present invention. As described above, the grounding system diagnosis apparatus 100 of the present invention performs monitoring and diagnosis on a grounding system, a surge protector (SPD), a safety voltage and a grounding life, and provides monitoring information on these configurations to a grounding system diagnosis server And notifies the manager when an error occurs.

3, the grounding system diagnosis apparatus 100 of the present invention includes a power supply unit 101, a processing unit 102, a signal generation unit 103, a signal application unit 104, a grounded electrode measurement unit 105, A safety voltage measuring unit 106, a surge protector measuring unit 107, a grounding performance measuring unit 108, a storage unit 109, a warning unit 110 and a communication unit 111. In the following description, elements overlapping with those of FIGS. 1 and 2 are omitted for clarity of description.

The power supply unit 101 functions to supply power to the grounding system diagnosis apparatus 100 of the present invention.

2, the signal generating unit 103 includes various measuring instruments, that is, a ground electrode measuring unit 105, a safety voltage measuring unit 106, a surge protector measuring unit 107, The measurement current, and the measurement data for measurement by the grounding performance measuring unit 108. [0042] The measurement frequency, measurement current, and measurement data thus generated are applied from the signal application unit 104 to the measurement equipment through the processing unit 102.

The grounding electrode measuring unit 105 measures a grounding electrode determination value including at least one of a grounding resistance to a grounding system, a grounding system, a first grounding current, and a grounding voltage. To this end, the ground electrode measurement unit 105 applies the measurement frequency, the measurement current, and the measurement data generated through the signal generation unit 103 to the ground electrode through the CT, The first ground current and the ground voltage are measured. Specifically, the grounding electrode measuring unit 105 measures a voltage through a current fed back from the grounding electrode, calculates a grounding resistance based on the measured voltage, and measures a first grounding current flowing through the grounding line through the CT have. The grounding electrode measuring unit 105 can calculate the grounding voltage by calculating the grounding resistance and the first grounding current.

The processing unit 102 diagnoses the state of the ground electrode based on at least one of the ground electrode judgment value calculated through the ground electrode measuring unit 105, that is, the ground resistance to the ground electrode, the first ground current and the ground voltage can do. That is, the processing unit 102 can determine the abnormal state with respect to the ground electrode by comparing the ground electrode determination value calculated through the ground electrode measurement unit 105 with the ground electrode threshold value.

The safety voltage measurement unit 106 measures the safety voltage, that is, the step voltage and the contact voltage. The safety voltage measurement unit 106 applies a current to the ground electrode and a predetermined number of voltage measurement terminals through a CT having a band of 40 Hz to 100 kHz for measuring the safety voltage. Here, the number of voltage measurement terminals is assumed to be seven. It is also assumed that three voltage measurement terminals are arranged inside the ground electrode and four are arranged outside the ground electrode. However, it should be understood that the number of these voltage measurement terminals is only an example, and is not limited to the above-described number.

As described above, in the case of the safety voltage measuring unit 106, the measurement is made by dividing the step voltage and the contact voltage. That is, when the voltages for the seven voltage measurement terminals 61 to 67 and the ground electrode 68 in the case of the contact voltage are measured, the ground voltage and the measured voltage difference are calculated. Specifically, the contact voltage is calculated by calculating the difference between the voltage to the measurement terminal and the battery electrode existing within the reference separation distance and the ground voltage as the reference voltage.

The measurement of the stride voltage is also performed on the basis of the difference between the voltage for the voltage measurement terminals 61 to 67 and the ground electrode 68 and the ground voltage and for the voltage measurement terminals 61 to 67 and the ground electrode 68 Can be calculated through the voltage difference of < RTI ID = 0.0 > The reason why the stride voltage is divided by the number of two cases is that, for example, when the left leg of the person touches the ground electrode and the right leg is distant from the ground electrode, and both the left leg and the right leg of the person are connected to the ground electrode As shown in FIG. Accordingly, the measurement of the step voltage of the present invention is carried out in consideration of both of the above cases.

When the measurement of the safety voltage is completed, the processing unit 102 can diagnose the safety voltage by comparing the calculated contact voltage and the threshold contact voltage, and comparing the calculated step voltage and the threshold step voltage.

The surge protector measurement unit 107 measures the leakage current flowing through the surge protector ground wire connected to the surge protector (SPD). Thereafter, the abnormality of the surge protector (SPD) can be determined by comparing the leakage current in the steady state and the abnormal leakage current in the abnormal state through the processing unit 102 with the measured leakage current.

The grounding performance measuring unit 108 measures lifetime derivation data including a second grounding current flowing into the grounding electrode, a ground resistivity, and the amount of chemical ions on the earth through a CT, a voltage measuring terminal, and a measuring sensor for measuring chemical ions Function. Here, the second ground current represents the DC component current at the ground current flowing to the ground electrode. here. The reason for determining the ground current of the DC component as a determining factor is that the DC current continuously ion-decomposes the ground electrode, which is a metal, so that the ground electrode itself is lost.

2, when the lifetime derivation data is measured through the CT, the voltage measurement terminal, and the measurement sensor for measuring the chemical ions, the ground performance measurement unit 108 can calculate the corrosion rate for the ground electrode . When the corrosion rate is calculated in this way, the processing unit 102 can predict and monitor the life of the ground electrode and the deteriorated performance through the calculated corrosion rate.

The storage unit 109 stores the measurement data, that is, the ground resistance for the ground electrode, the first ground current and the ground voltage, the safety voltage, the leakage current data for the surge protector, and the life derivation data , A second ground current, a ground resistivity, a chemical ion amount, and the like. The data stored in the storage unit 109 may be used for analysis of the subsequent management and the grounding system.

When abnormality is detected in at least one of the monitoring result through the processing unit 102, the ground system, the safety voltage, and the surge protector, the monitoring information can be transmitted to the grounding system diagnosis server through the communication unit 111. That is, the communication unit 111 is used for communication between the grounding system diagnosis server and the emergency notification apparatus and the grounding system diagnosis apparatus 100. Communication between the earthing system diagnostic server and the emergency notification device and the earthing system diagnostic device 100 may be via a communication network such as, for example, RS485, Internet and Ethernet.

When an abnormality is detected in at least one of the monitoring result through the processing unit 102, the ground system, the safety voltage, and the surge protector, the alarm unit 110 can notify the abnormal state to the manager via the display or the speaker. In this way, the administrator can quickly respond to the occurrence of the abnormality.

In addition, the signal data (ground system, surge protector, safety voltage, grounding performance, and corrosion prediction value) measured through the above configurations although not shown in the drawings can be processed in the processing unit 102 and displayed on a separate display unit.

Hereinafter, with reference to FIG. 4, an operation method of the grounding system diagnosis apparatus according to an embodiment of the present invention will be described. 4 is a flowchart of a method of diagnosing a ground system according to an embodiment of the present invention. For the sake of clarity in the following description, the parts that are referred to with reference to Figs. 1 to 3 are omitted.

First, a step of generating a measurement frequency and a measurement current through a signal generator (S101) is performed. That is, as described with reference to FIG. 2 and FIG. 3, step S101 is a measurement frequency for measuring various measuring instruments, i.e., a ground electrode measuring unit, a safety voltage measuring unit, a surge protector measuring unit and a grounding performance measuring unit, And measurement data.

Thereafter, the step of measuring the ground electrode determination value for the grounding system (S102) is performed by the grounding electrode measuring unit. Specifically, in operation S102, the measuring frequency and the measuring current generated through the signal generating unit are applied to the ground electrode, and grounded through the ground electrode, which includes at least one of the grounding resistance, the first grounding current, And measuring the judgment value. The measurement of the ground resistance among the ground electrode determination values performed in step S102 is performed by measuring the voltage through the current fed back from the ground electrode and calculating the ground resistance based on the measured voltage. The measurement of the ground current among the ground electrode determination values performed in step S102 is performed by measuring the first ground current flowing through the ground line through the CT. In addition, the measurement of the ground voltage among the ground electrode determination values performed in step S102 may be performed by calculating the ground resistance and the first ground current measured in advance.

Thereafter, step S103 of measuring the safety voltage including the contact voltage and the step-up voltage of the grounding system is performed by the safety voltage measuring unit. Specifically, in step S103, the measurement frequency and the measurement current generated through the signal generator are applied to the ground electrode and the plurality of voltage measurement terminals, and the current value returned from the ground electrode and the plurality of voltage measurement terminals, Voltage and step voltage. Also, when the measurement frequency and the measurement current are applied to the ground electrode and the plurality of voltage measurement terminals in step S103, a CT having a frequency band of 40 Hz to 100 kHz may be used.

In addition, as described above, in the case of the measurement of the safety voltage, the measurement is performed by dividing the case of the contact voltage and the step voltage. Here, the contact voltage is calculated through the voltage difference between the ground electrode and the voltage for the plurality of voltage measurement terminals and the ground voltage. Further, the step-up voltage is calculated through a voltage difference between the voltage of the ground electrode and a plurality of voltage measurement terminals and the ground voltage, and a voltage difference between the ground electrode and a plurality of voltage measurement terminals. A detailed description of these measurement methods is already described in detail with reference to FIGS. 2 and 3, so that further description thereof is omitted for the sake of clarity.

Then, a step (S104) of measuring the leakage current flowing in the surge protector ground wire connected to the surge protector (SPD) is performed.

Thereafter, step (S105) of measuring the life derivation data for the ground electrode is performed. Here, the lifetime derivation data includes the second ground current, the ground resistivity, and the amount of chemical ions of the earth that are introduced into the ground electrode as described above. Measurement of these lifetime data can be done through CT, voltage measurement terminals and measurement sensors that measure chemical ions. In step S105, when the lifetime derivation data is measured, the corrosion rate for the ground electrode is calculated based on the measured lifetime derivation data. The above-described steps (steps S102 to S105) in the foregoing description are written as if they progressed in a sequential manner, but this is for the purpose of merely understanding the specification and the order of measurement for each configuration may be changed. In addition, steps S102 to S105 may be performed in various ways, such as performing only required steps as necessary and skipping the remaining steps.

Thereafter, step S106 is performed to predict the lifetime and performance of the ground electrode based on the corrosion rate calculated in step S106.

Thereafter, step S107 of comparing the ground electrode judgment value, the safety voltage, the leakage current, and the lifetime derivation data with the respective threshold values is performed by the processing section, and based on the comparison result in step S107, (S108) is performed. If it is determined in step S108 that an error has occurred in the ground system, the control is transferred to step S109. Otherwise control is passed to the end block. It should be understood that, in the case of the comparison step of S107, it is only an example that the steps S101 to S106 are performed sequentially and then performed. That is, in step S107, it is possible to further determine whether or not the ground system is abnormal by comparing the measured value and the threshold value after the measurement is completed in steps S102, S103, S104, and S105.

Step S109 is a step performed when it is determined that an abnormality has occurred in the grounding system, and it is a step of transmitting abnormality information on the grounding system to the grounding system diagnosis server. Thereafter, in step S110, a step of informing the manager of the abnormal state is performed through the warning unit. Even if an abnormality occurs in the grounding system through steps S109 and S110, quick action is possible.

The diagnostic system according to an embodiment of the present invention is applicable to all fields where electricity is used, such as electric, electronic, communication equipment, and control fields. In addition, the diagnostic system of the present invention improves operational quality and operation service by preventing deterioration of operating quality, deterioration of communication quality, loss of information, and loss of life, which may be caused by abnormality of grounding facilities, As well as economic benefits.

In addition, in the field of communication, it is possible to perform effective facility operation by monitoring the problem due to noise in advance, and it is possible to analyze the cause of malfunction of various control signals in the field of railway and electric machinery, thereby maximizing the safety and efficiency of operation. And can be used to analyze more accurate medical data in extremely sensitive medical and medical laser equipment that is directly connected to the safety of human life.

To ensure the stable operation and safety of the equipment, the grounding equipment surveillance equipment is developed as a very important equipment to ensure the stability and safety of the equipment management, protection and operation

The developed technology has the following advantages.

- Ensuring high quality call quality for large capacity multi-service network

- Reduction of expenses by securing stable operation of facilities

- Prevent malfunction of equipment through stable removal of electromagnetic noise and surge

- Maximize facility operation service by ensuring grounding performance

- Maximizing the protection of people and equipment

In addition, the developed technology is used in the fields of wired and wireless information and communication (communication exchange equipment, wireless communication equipment, transmission equipment, etc.), railway and train (railway control system, (Radar system for military use, radar system for meteorological observation, satellite communication equipment, etc.), electric power facilities and substations (154kV substations, power plants, etc.) ) And the airport sector (such as airborne hover landing guidance systems, aircraft communication systems, etc.).

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: grounding system diagnosis device 101:
102: Processor 103: Signal generator
104: signal applying unit 105: ground electrode measuring unit
106: Safety Voltage Measurement Unit 107: Surge Protector Measurement Unit
108: grounding performance measuring unit 109: storage unit
110: Warning part 111:

Claims (20)

A grounding system diagnosis apparatus for monitoring performance and status of a grounding system in real time and transmitting monitoring information about the grounding system to a grounding system diagnosis server,
A grounding electrode determination value including at least one of a grounding resistance, a first grounding current, and a grounding voltage is measured through a current fed back from the grounding electrode by applying a measuring frequency and a measuring current generated through the signal generating unit to the grounding electrode A ground electrode measuring unit;
Wherein the measurement frequency and the measurement current generated through the signal generator are applied to the ground electrode and a plurality of voltage measurement terminals provided inside and outside the ground electrode, A safety voltage measuring unit for measuring a safety voltage including a contact voltage and a step-up voltage of the ground system through a return current value; And
And a processing unit for comparing and monitoring the ground electrode determination value and the ground electrode threshold value and the safety voltage and the reference safety voltage and transmitting the monitoring information to the grounding system diagnosis server through a communication unit. System diagnostic device. The method according to claim 1,
The safety voltage measuring unit may include:
Wherein the measurement frequency and the measurement current are applied to the ground electrode and the plurality of voltage measurement terminals through a CT (Current Transformer) having a frequency band of 40 Hz to 100 kHz. The method according to claim 1,
The safety voltage measuring unit may include:
And the contact voltage is calculated through a voltage difference between the ground electrode and the voltage to the plurality of voltage measurement terminals and the ground voltage. The method according to claim 1,
The safety voltage measuring unit may include:
And the step voltage is calculated through the voltage difference between the ground electrode and the voltage measurement terminals and the ground voltage, and the voltage difference between the ground electrode and the plurality of voltage measurement terminals. , A grounding system diagnostic device. The method according to claim 1,
A surge protector measuring unit for measuring a leakage current flowing through a surge protector ground line connected to a surge protection device (SPD)
The processing unit compares the leakage current flowing through the ground line of the surge protector, the normal leakage current when the surge protector (SPD) is in a steady state, and the abnormal leakage current when the surge protector (SPD) is in an abnormal state, Further comprising monitoring the abnormal condition of the surge protector (SPD). 6. The method of claim 5,
Wherein,
And transmits the abnormal information to the grounding system diagnosis server through the communication unit if an abnormality is detected in at least one of the grounding system, the safety voltage, and the surge protector. 6. The method of claim 5,
A grounding performance measuring unit for measuring lifetime derivation data including a second ground current for the ground electrode, a ground resistivity for the ground, and a chemical ion amount of the ground, and calculating a corrosion rate for the ground electrode based on the lifetime derivation data Further included,
And the processing section predicts the life and performance of the ground electrode based on the corrosion rate. 8. The method of claim 7,
Further comprising an alarm unit for notifying an abnormality to the manager via a display or a speaker when an abnormality is detected in at least one of the ground system, the safety voltage and the surge protector through the processing unit, . The method according to claim 1,
The plurality of voltage measurement terminals may include:
Internal probe terminals located within the ground electrode, and external probe terminals located external to the ground electrode. The method according to claim 1,
The ground electrode measuring unit includes:
Measuring a voltage through a current fed back from the ground electrode, calculating a ground resistance based on the measured voltage, and measuring a first ground current flowing through the ground line via the CT. 11. The method of claim 10,
The ground electrode measuring unit includes:
And the ground voltage is calculated by calculating the ground resistance and the first ground current. An operating method for a grounding system diagnostic apparatus that monitors performance and status of a grounding system in real time and transmits monitoring information about the grounding system to a grounding system diagnosis server,
Applying a measurement frequency and a measurement current generated through the signal generation unit to the ground electrode by the ground electrode measurement unit;
Measuring a ground electrode determination value including at least one of a grounding resistance, a first grounding current, and a grounding voltage through the current returned from the grounding electrode by the grounding electrode measuring unit;
Applying a measurement frequency and a measurement current generated through the signal generation unit to the ground electrode and a plurality of voltage measurement terminals provided inside and outside the ground electrode by the safety voltage measurement unit;
Measuring a safety voltage including a contact voltage and a step voltage of the ground system through the ground electrode and a current value returned from the plurality of voltage measurement terminals by the safety voltage measurement unit; And
And a step of comparing and monitoring the ground electrode determination value and the ground electrode threshold value and the safety voltage and the reference safety voltage by the processing unit and transmitting the monitoring information to the grounding system diagnosis server through the communication unit Of the grounding system. 13. The method of claim 12,
Wherein the step of applying the measurement frequency and the measurement current generated through the signal generator to the ground electrode and the plurality of voltage measurement terminals comprises:
Is performed via a CT having a frequency band of 40 Hz to 100 kHz. 13. The method of claim 12,
The step of measuring the safety voltage comprises:
Wherein the contact voltage is calculated through a voltage difference between the ground electrode and a voltage between the plurality of voltage measurement terminals and the ground voltage. 13. The method of claim 12,
The step of measuring the safety voltage comprises:
And the step voltage is calculated through the voltage difference between the ground electrode and the voltage measurement terminals and the ground voltage, and the voltage difference between the ground electrode and the plurality of voltage measurement terminals. , A method of operating the earthing system diagnostic device. 13. The method of claim 12,
Further comprising the step of measuring a leakage current flowing through the surge protector ground line in the surge protector by the surge protector measurement unit,
By comparing the leakage current flowing through the ground line of the surge protector with the normal leakage current when the surge protector (SPD) is in a steady state and the abnormal leakage current when the surge protector (SPD) is in an abnormal state, Wherein the abnormal state of the surge protector (SPD) is further determined. 16. The method of claim 15,
Measuring a lifetime derivation data including a second ground current to the ground electrode, a ground resistivity to the ground, and a chemical ion amount of the earth by the grounding performance measurement unit, and based on the lifetime derivation data, ≪ / RTI >
Wherein the processor further estimates the lifetime and performance of the ground electrode based on the corrosion rate. 13. The method of claim 12,
The step of measuring the ground electrode determination value comprises:
Measuring a voltage through a current fed back from the ground electrode, calculating a grounding resistance based on the measured voltage, and measuring a first grounding current flowing through the grounding line through the CT, Way. 19. The method of claim 18,
The step of measuring the ground electrode determination value comprises:
And calculating said ground voltage by calculating said ground resistance and said first ground current. 12. A system diagnosis apparatus according to any one of claims 1 to 11, And
A grounding system diagnosis unit for monitoring and managing the grounding system diagnosis apparatus and the plurality of other grounding system diagnosis apparatuses by receiving monitoring information transmitted from the grounding system diagnosis apparatus and monitoring information transmitted from a plurality of other grounding system diagnosis apparatuses And a server.

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