TWI732661B - Intelligent monitoring device for power distribution system - Google Patents

Abstract

An intelligent monitoring device includes a current ratio unit, an analog sampling unit, a micro-processing unit, a communication unit and a monitoring master station. The current comparator unit senses a cable connector to generate a sensing signal indicating a current value of a current driving power, the analog sampling unit generates an analog sampling signal according to the sensing signal, and the micro-processing unit samples according to the analog The signal generates a first signal output, and it is determined whether the current value of the current driving power is greater than a critical current value, and when the determination is yes, a first warning signal is generated, and the communication unit wirelessly transmits a signal carrying the first signal A signal output and a first communication signal of the first warning signal, and the monitoring master station displays the first signal output and the first warning signal in the first communication signal to facilitate monitoring.

Description

Intelligent monitoring device for power distribution system

The invention relates to a device, in particular to an intelligent monitoring device used in a power distribution system.

The wiring of the existing power distribution system is deployed underground, so each cable connector used to connect two different power distribution power lines is, for example, set in a manhole space on the road and buried one meter below the ground surface. As a result, in addition to making it difficult for inspectors to monitor the cable connector, the cable connector is also prone to high impedance of its connector due to earthquake looseness or poor construction, or partial discharge due to the aging of the cable connector. Discharge, PD, which is a common electrical collapse phenomenon in high-voltage equipment), causes its own failure and damage due to increased temperature, which in turn causes power outages and affects public safety and power supply quality. Therefore, how to easily monitor the cable joint and immediately know whether the cable joint is malfunctioning is a problem that the related industry wants to improve.

Therefore, the purpose of the present invention is to provide an intelligent monitoring device that can overcome the shortcomings of the prior art.

Therefore, the intelligent monitoring device of the present invention is suitable for a cable joint of a power distribution system. The cable joint is electrically connected between two power lines each transmitting a driving power. The intelligent monitoring device includes a current ratio unit and an analog sampling Unit, a micro-processing unit, a communication unit, and a monitoring master station.

The current comparator unit senses the cable joint to generate a sensing signal indicating a current value of the current driving power.

The analog sampling unit is electrically connected to the current comparator unit to receive the sensing signal, and perform analog sampling of the sensing signal to generate an analog sampling signal indicating the current value of the current driving power.

The micro-processing unit is electrically connected to the analog sampling unit to receive the analog sampling signal, and generates a first signal output having the current value of the current driving power according to the analog sampling signal, and also judges the current output according to the analog sampling signal Whether the current value of the driving power is greater than a critical current value, and when the judgment result is yes, a first warning signal is generated, and the first warning signal has a fault flag for indicating the occurrence of overcurrent and a fault flag for indicating One of the cable connectors corresponds to the number information of the identification code.

The communication unit is electrically connected to the micro-processing unit to receive the first signal output and the first warning signal, and accordingly wirelessly transmit a first communication signal, the first communication signal carrying the first signal output and the first signal output A warning signal.

The monitoring master station receives the first communication signal from the communication unit, and displays the current value of the current driving power corresponding to each of the first signal output and the first warning signal in the first communication signal, and The fault flag and the number information to facilitate monitoring.

The effect of the present invention is to use the current comparator unit to automatically sense the cable connector, and use the micro-processing unit to determine whether the driving power is greater than the critical current value, and when the determination result is yes, the communication unit actively The first communication signal is sent to the monitoring master station, so that the monitoring master station correspondingly displays the current value of the driving power, the fault flag and the number information, for the detection personnel to perform real-time monitoring, and thus has easy monitoring And it does not need to consume a lot of manpower.

Referring to Fig. 1, an embodiment of the intelligent monitoring device of the present invention is suitable for a cable connector 1 of a power distribution system (not shown). The cable connector 1 is electrically connected between two power lines 11, 12 each transmitting a driving power. The intelligent monitoring device includes a current ratio unit 2, a sensing unit 3, an analog sampling unit 4, a micro processing unit 5, a communication unit 6, an energy conversion unit 7, a super capacitor 8, and a monitoring unit Master station 9. In this embodiment, the cable connector 1, the current ratio unit 2, the sensing unit 3, the analog sampling unit 4, the micro processing unit 5, the communication unit 6, the energy conversion unit 7 and the super capacitor 8 Set up inside a manhole space on the road and buried one meter below the ground. The monitoring master station 9 is installed on the road surface. In addition, in this embodiment, the intelligent monitoring device monitors the cable joint 1 of the power distribution system as an example, but it is not limited to this. In other embodiments, the intelligent monitoring device can monitor other power equipment of the power distribution system.

The current ratio unit 2 senses the cable connector 1 to generate a sensing signal indicating a current value of the driving power, and also generates an energy signal in an electromagnetic induction manner according to the driving power. In this embodiment, the comparator unit 2 includes a first comparator 21 and a second comparator 22.

The first current converter 21 is electrically connected to the analog sampling unit 4 and senses the cable connector 1 to generate the sensing signal, and outputs the sensing signal to the analog sampling unit 4. In this embodiment, the first comparator 21 is a Rogowski comparator, which mainly uses a Rogowski current sensing method to obtain the sensing signal.

The second current converter 22 converts the driving power into the energy signal in an appropriate ratio by the electromagnetic induction method according to the driving power. In this embodiment, the second current ratio device 22 is a Permalloy alloy current device, but it is not limited to this.

The sensing unit 3 is electrically connected to the analog sampling unit 4, and periodically (for example, continuously) senses the cable connector 1 and its environment to generate a sensing signal output So, and output the sensing signal So Transmitted to the analog sampling unit 4. The sensing signal output So indicates the temperature of the cable joint 1 and the humidity, gas and water level of the environment in which it is located.

The analog sampling unit 4 is electrically connected to the first comparator 21 of the comparator unit 2 to receive the sensing signal, and receives the sensing signal output So from the analog sampling unit 4. The analog sampling unit 4 performs analog sampling on the sensing signal to generate an analog sampling signal As indicating the current value of the current driving power, and performs analog sampling on the sensing signal output So to generate an indication of the cable The analog signal output Ao of the temperature of the connector 1 and the humidity, gas and water level of the environment in which it is located.

The micro-processing unit 5 is electrically connected to the analog sampling unit 4 to receive the analog sampling signal As and the analog signal output Ao, and generate a first signal output So1 having the current value of the current driving power according to the analog sampling signal As , And according to the analog signal output Ao, a second signal output So2 having the temperature of the cable joint 1 and the humidity, gas and water level of the environment in which it is located is generated. The micro-processing unit 5 determines whether the current value of the current driving power is greater than a critical current value according to the analog sampling signal As, and generates a first warning signal W1 when the determination result is yes. The first warning signal W1 has a fault flag for indicating the occurrence of overcurrent, and a number information for indicating a corresponding identification code of the cable connector 1. In addition, the micro-processing unit 5 also judges whether the temperature of the cable connector 1 and the humidity and water level of the environment in which it is located is greater than a respective critical value according to the analog signal output Ao, and judges the environment of the cable connector 1 Whether the gas is a toxic gas, and when at least one judgment result is yes, a second warning signal W2 is generated. The second warning signal W2 has an abnormal flag indicating that at least one of the temperature of the cable connector 1 and the humidity, gas, and water level of the environment in which it is located is abnormal, and the corresponding flag for indicating the cable connector 1 Number information of the identification code.

The communication unit 6 is electrically connected to the micro-processing unit 5 to receive the first and second signal outputs So1, So2 and the first and second warning signals W1, W2, and wirelessly transmit a first communication signal accordingly And a second communication signal. In this embodiment, the first communication signal carries the first signal output So1 and the first warning signal W1, and the second communication signal carries the second signal output So2 and the second warning signal W2.

The energy conversion unit 7 is electrically connected to the sensing unit 3, the analog sampling unit 4, the micro-processing unit 5, the communication unit 6, the super capacitor 8, and the second current comparator 22 of the current comparator unit 2 , Receiving the energy signal from the second current ratio device 22. When a current value of the energy signal is greater than or equal to a predetermined current value, the energy conversion unit 7 converts the energy signal to generate an output voltage V1, and supplies the output voltage V1 to the sensing unit 3, the analog The sampling unit 4, the micro-processing unit 5, and the communication unit 6 output the output voltage V1 to the super capacitor 8, so that the super capacitor 8 is charged according to the output voltage V1. When the current value of the energy signal is less than the predetermined current value, the energy conversion unit 7 supplies the output voltage V1 to the sensing unit 3, the analog sampling unit 4, the micro The processing unit 5 and the communication unit 6.

The monitoring master station 9 receives the first and second communication signals from the communication unit 6. When receiving the first communication signal, the monitoring master station 9 displays the current value of the current driving power corresponding to each of the first signal output So1 and the first warning signal W1 in the first communication signal, and The fault flag and the number information. When receiving the second communication signal, the monitoring master station 9 displays the temperature of the cable connector 1 and its location corresponding to the second signal output So2 and the second warning signal W2 in the second communication signal. The humidity, gas and water level of the environment, as well as the abnormal flag and the number information. In this embodiment, the monitoring master station 9 includes a data centralizing unit 91 and a geographic map data host 92.

The data concentration unit 91 receives the first and second communication signals Cs1 and Cs2 from the communication unit 6, and outputs the first and second communication signals Cs1 and Cs2 via a public network. In this embodiment, the data concentration unit 91 communicates with the communication unit 6 through a long range (Long Range) wireless communication method to receive the first and second communication signals Cs1 and Cs2, but it is not limited to this. .

The geographic map data host 92 stores a piece of geographic map information, and receives the first and second communication signals Cs1 and Cs2 via the public network, and based on the geographic map information and the first and second communication signals Cs1, The number information in Cs2 determines a geographic location of the cable connector 1, and correspondingly displays the current value of the current driving power, the temperature of the cable connector 1 and the humidity, gas and water level of the environment in which it is located, and the fault flag , The abnormal flag, the number information and the geographic location for the inspection personnel to monitor (that is, the inspectors can visually query the cable connector 1 indicating the occurrence of overcurrent or abnormality in real time and locate the fault in real time). In this way, the inspector can quickly know the location of the cable connector 1 indicating the occurrence of an overcurrent or abnormality, and perform relevant maintenance measures immediately. In this embodiment, the geographic map resource host 92 is set in the background of the power distribution terminal, but it is not limited to this.

It should be noted that when the cable connector 1 generates partial discharge (PD) due to aging, the sensing signal indicates the current value of the current driving power and a partial discharge information. The analog sampling signal As indicates the current value of the current driving power and the partial discharge information. The first signal output So1 has the current value of the current driving power and the partial discharge information. In this way, the geographic map data host 92 also displays the partial discharge information for the inspector to monitor whether the cable connector 1 is too aging and needs to be replaced with a new cable connector.

In summary, the intelligent monitoring device of the present invention automatically senses the cable connector 1 and its environment through the first current ratio device 21 and the sensing unit 3, and uses the micro-processing unit 5 to determine the drive Whether the electric power has overcurrent, or judge whether the temperature of the cable joint 1 and the humidity, gas and water level of the environment in which it is located is abnormal, and when the judgment result is yes, the communication unit 6 takes the initiative to perform the first and second The corresponding one of the two communication signals is sent to the monitoring master station 9, so that the geographic map data host 92 correspondingly displays that an overcurrent has occurred and a fault occurs, or that at least one of temperature, humidity, gas, and water level is abnormal. The geographic location can be monitored by the inspectors, and the inspectors can immediately perform relevant maintenance measures on the cable connector 1 that has a fault or abnormality. That is to say, the intelligent monitoring device of the present invention can easily monitor the cable connector 1. And it is immediately known whether the cable connector 1 is faulty or abnormal, and the geographic location of the cable connector 1 is obtained, which is convenient for inspection personnel to use, and does not require a lot of manpower. In this way, the cable connector 1 can be prevented from causing a power outage due to failure and damage, thereby improving public safety and power supply quality.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to Within the scope covered by the patent of the present invention.

1: Cable connector 11, 12: power line 2: Specific flow unit 21, 22: the first and second proportioners 3: Sensing unit 4: Analog sampling unit 5: Micro processing unit 6: Communication unit 7: Energy conversion unit 8: Super capacitor 9: Monitoring the master station 91: Data Centralization Unit 92: Geographic Map Information Host Ao: Ratio signal output As: analog sampling signal Cs1, Cs2: first and second communication signals So: Sensing signal output So1, So2: first and second signal output V1: output voltage W1, W2: the first and second warning signals

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Fig. 1 is a schematic diagram illustrating an embodiment of the intelligent monitoring device of the present invention.

1: Cable connector

11, 12: power line

2: Specific flow unit

21, 22: the first and second proportioners

3: Sensing unit

4: Analog sampling unit

5: Micro processing unit

6: Communication unit

7: Energy conversion unit

8: Super capacitor

9: Monitoring the master station

91: Data Centralization Unit

92: Geographic Map Information Host

Ao: analog signal output

As: analog sampling signal

Cs1, Cs2: first and second communication signals

So: Sensing signal output

So1, So2: first and second signal output

V1: output voltage

W1, W2: the first and second warning signals

Claims (9)

An intelligent monitoring device suitable for a cable joint of a power distribution system, the cable joint being electrically connected between two power lines each transmitting a driving power, the intelligent monitoring device includes: A current ratio unit to sense the cable joint to generate a sensing signal indicating a current value of the current driving power; An analog sampling unit, electrically connected to the current comparator unit to receive the sensing signal, and perform analog sampling of the sensing signal to generate an analog sampling signal indicating the current value of the current driving power; A micro-processing unit electrically connected to the analog sampling unit to receive the analog sampling signal, and generate a first signal output with the current value of the current driving power according to the analog sampling signal, and determine the current output according to the analog sampling signal Whether the current value of the driving power is greater than a critical current value, and when the judgment result is yes, a first warning signal is generated, and the first warning signal has a fault flag for indicating the occurrence of overcurrent and a Indicates the number information corresponding to the identification code of one of the cable connectors; A communication unit electrically connected to the micro-processing unit to receive the first signal output and the first warning signal, and wirelessly transmit a first communication signal based on the first signal output and the first signal output The first warning signal; and A monitoring master station that receives the first communication signal from the communication unit, and displays the current value of the current driving power corresponding to each of the first signal output and the first warning signal in the first communication signal, And the fault flag and the number information to facilitate monitoring. The intelligent monitoring device according to claim 1, wherein, when the cable connector generates a partial discharge, the sensing signal indicates the current value of the driving power and a partial discharge information, and the analog sampling signal indicates the current The current value of the driving power and the partial discharge information, and the first signal output has the current value of the driving power and the partial discharge information. The intelligent monitoring device according to claim 1, wherein the current ratio unit further generates an energy signal in an electromagnetic induction manner according to the driving power. The intelligent monitoring device according to claim 3, wherein the current ratio unit includes: A first current converter, electrically connected to the analog sampling unit, and sensing the cable connector to generate the sensing signal, and outputting the sensing signal to the analog sampling unit, and A second current converter generates the energy signal in the electromagnetic induction method according to the driving power. The intelligent monitoring device as described in claim 3, further comprising: A super capacitor; and An energy conversion unit, electrically connected to the analog sampling unit, the micro-processing unit, the communication unit, the super capacitor, and the comparator unit, receives the energy signal from the comparator unit, and acts as one of the energy signals When the current value is greater than or equal to a predetermined current value, the energy conversion unit supplies an output voltage to the analog sampling unit, the micro-processing unit, and the communication unit according to the energy signal, and outputs the output voltage to the super capacitor, so that The super capacitor is charged according to the output voltage. The intelligent monitoring device according to claim 5, wherein, when the current value of the energy signal is less than the predetermined current value, the energy conversion unit supplies the output voltage to the analog sampling according to the power stored in the super capacitor Unit, the micro-processing unit and the communication unit. The intelligent monitoring device as described in claim 1, further comprising: A sensing unit is electrically connected to the analog sampling unit, and senses the cable connector and its environment to generate a sensing signal output, and transmits the sensing signal output to the analog sampling unit, the sensing signal The output indicates the temperature of the cable joint and the humidity, gas and water level of the environment in which it is located. The intelligent monitoring device according to claim 7, wherein: The analog sampling unit also performs analog sampling of the sensing signal output to generate an analog signal output indicating the temperature of the cable joint and the humidity, gas and water level of the environment in which it is located. The micro-processing unit also receives the analog signal output from the analog sampling unit, and generates a second signal output with the temperature of the cable joint and the humidity, gas and water level of the environment in which it is located according to the analog signal output, and also According to the analog signal output, it is judged whether the temperature of the cable joint and the humidity and water level of the environment in which it is located are greater than a corresponding critical value, and whether the gas in the environment of the cable joint is a toxic gas, and at least one When the judgment result is yes, a second warning signal is generated. The second warning signal has an abnormal flag indicating that at least one of the temperature of the cable joint and the humidity, gas, and water level of the environment in which it is located is abnormal, and the Number information used to indicate the corresponding identification code of the cable connector, The communication unit also receives the second signal output and the second warning signal, and wirelessly transmits a second communication signal accordingly, the second communication signal carrying the second signal output and the second warning signal, and The monitoring master station also receives the second communication signal, and displays the temperature of the cable connector and the humidity and gas of the environment in which the second signal output and the second warning signal correspond to each of the second communication signals. And the water level, and the abnormal flag and the number information to facilitate monitoring. The intelligent monitoring device according to claim 8, wherein the monitoring master station includes: A data concentration unit that receives the first and second communication signals from the communication unit, and outputs the first and second communication signals via a public network, and A geographic map data host stores a geographic map data information, and receives the first and second communication signals via the public network, and based on the geographic map data information and the number information in the first and second communication signals Determine a geographic location of the cable connector, and correspondingly display the current value of the current driving power, the temperature of the cable connector and the humidity, gas and water level of the environment in which it is located, the fault flag, the abnormal flag, and the number Information and the geographic location to facilitate monitoring.

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