Power taking device for improving online rate of power distribution automation terminal and use method

Abstract

The invention discloses a power taking device for improving the online rate of a power distribution automation terminal and a using method, the power taking device comprises two half box bodies which can be opened and closed, the middle positions of the sides, close to each other, of the half box bodies are each provided with a half wire groove, and when the half box bodies are closed to form a complete box body, the half wire grooves form a complete wire groove; a lead is concentrically and coaxially embedded in the lead groove; a CT power taking module, a solar power generation module, a control module and a battery module are arranged in the complete box body, the CT power taking module and the solar power generation module are connected in parallel, the control module is electrically connected with the battery module, and the battery module comprises a main battery and a standby battery which are connected with the control module in parallel. And meanwhile, the output power is ensured through the standby batteries connected in parallel, and insufficient output power caused by damage of the batteries of the power distribution automation terminal is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution automation terminal related devices, and in particular to a power taking device and a use method for improving the online rate of a distribution automation terminal. Background Art

[0002] The distribution automation terminal (FTU) adopts advanced DSP digital signal processing technology, multi-CPU integration technology, high-speed industrial network communication technology, and an embedded real-time multi-tasking operating system. It has strong stability, high reliability, good real-time performance, wide adaptability to the environment, and powerful functions. It is a new generation of feeder automation remote terminal device that integrates telemetry, telesignaling, remote control, protection and communication functions.

[0003] In actual use, it was found that the old distribution automation terminals had over-tripping, causing FTU failures and poor FTU online rate. After on-site inspection, investigation and verification, the following conclusions were drawn: FTUs with many failures mostly used capacitor PTs to draw power. The output power of the capacitor PT could not meet the FTU operating power, resulting in insufficient output power of the energy supply device, frequent over-tripping and FTU failures.

[0004] In addition, the battery of the FTU power supply circuit is sometimes damaged during use, and there is no backup power supply in the energy acquisition device, so the output cannot be increased to compensate for the output reduction caused by the damage to the battery of the FTU power supply circuit, resulting in insufficient energy supply to the FTU power supply circuit, causing over-tripping and FTU failure. Summary of the invention

[0005] The present invention provides a power taking device and a method for using the device for improving the online rate of distribution automation terminals, aiming to solve the problem in the prior art that the power taking device has insufficient output power and lacks a backup power supply, thereby causing insufficient energy supply in the FTU power supply circuit, leading to over-tripping and causing FTU failure.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A power taking device for improving the online rate of distribution automation terminals comprises two half boxes that can be opened and closed, wherein the middle positions of the half boxes close to each other are each provided with a half wire groove, and when the half boxes are closed to form a complete box, the half wire groove forms a complete wire groove, and wires are coaxially embedded in the wire groove; The complete box is provided with a CT power supply module, a solar power generation module, a control module and a battery module. The CT power supply module and the solar power generation module are connected in parallel, the control module is electrically connected to the battery module, and the battery module includes a main battery and a backup battery connected in parallel with the control module.

[0007] Preferably, the CT power supply module comprises half power supply CTs respectively arranged in half boxes on both sides, the half power supply CTs are symmetrically arranged about the wire grooves, and when the half boxes are closed to form a complete box, the half power supply CTs form a complete power supply CT, and the complete power supply CT is concentric and coaxial with the wire grooves; The solar power generation module includes a solar panel arranged on the top of the top half box; The control module includes a power board arranged in the bottom half of the box body, which is used for charging management and power switching, and the solar panel and the power CT are connected in parallel with the power board; The battery module includes a main battery and a backup battery connected in parallel with the power board.

[0008] As a more preferred embodiment, the half boxes are symmetrically arranged, and corresponding sides of the half boxes form an articulated fit through a hinge, and corresponding other sides of the half boxes form a detachable locking fit through a lock.

[0009] Furthermore, a DC plug is provided at the bottom of the half box on the bottom side, the DC plug is electrically connected to the power board, and the DC plug is electrically connected to the battery of the distribution automation terminal through a lead.

[0010] Furthermore, a power switch is provided at the bottom of the half box at the bottom side, and the power switch is electrically connected to the power board.

[0011] Specifically, a plurality of mounting seats are arranged in the half box at the bottom side, and the power board is detachably fastened with the mounting seats by fastening screws.

[0012] A method for using a power taking device for improving the online rate of a distribution automation terminal, using the power taking device to supply power to the distribution automation terminal, comprises the following steps: S1, open the half box; S2, start the power taking device; S3, hang the power taking device on the wire of the line, arrange the solar power generation module at the top facing upward, embed the wire in the half wire groove, close, close and lock the half box; S4. The power taking device is electrically connected to the battery of the distribution automation terminal through the lead wire; S5. The power taking device initially uses the CT power taking module to power the battery module. When the output power of the CT power taking module is insufficient, the control module switches to the solar power generation module for power supply. When the output power of the solar power generation module is insufficient, the control module switches to the CT power taking module for power supply. When the output power of the solar power generation module and the output power of the CT power taking module are both insufficient, the control module switches to the CT power taking module and the solar power generation module for power supply at the same time. The power taking device initially supplies power to the battery of the distribution automation terminal through the main battery of the battery module. When the control module in the distribution automation terminal detects insufficient power supply, it sends a signal to the control module of the power taking device and switches to the main battery and the backup battery to jointly supply power to the battery of the distribution automation terminal through the control module of the power taking device.

[0013] Preferably, in S2, the power taking device is started by turning on a power switch.

[0014] As a more preferred embodiment, in S3, the two half boxes are locked by a lock, and the two half boxes are completely fitted together to form a locked fixation.

[0015] Furthermore, the S4 is electrically connected to the battery of the distribution automation terminal through a DC plug and matching leads.

[0016] Beneficial effects of the present invention: 1. The present invention replaces PT power supply with CT power supply to increase output power and ensure output stability; 2. Set up solar power generation to assist in charging the energy supply battery module. The charging process is controlled by the power board. CT power supply and solar power generation are coordinated or alternately performed to ensure the efficiency of charging and energy supply and achieve non-stop installation. 3. Set up a backup battery. When the battery in the FTU power supply circuit is damaged, the backup battery can be used to increase the energy supply, ensure the use of the FTU power supply circuit, prevent immediate over-tripping, and give maintenance personnel sufficient response time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of one side of the power taking device of the present invention when it is closed; Figure 2 It is a three-dimensional schematic diagram of the other side of the power extraction device of the present invention when it is closed; Figure 3 It is a three-dimensional schematic diagram of one side of the power extraction device of the present invention when it is opened on the wire; Figure 4 It is a three-dimensional schematic diagram of the other side of the power extraction device of the present invention when it is opened on the wire; Figure 5 is a perspective wireframe schematic diagram of the power extraction device of the present invention; Figure 6 It is a schematic diagram of system connection when the power taking device of the present invention is connected to the FTU energy supply circuit; In the figure: 1. half box; 2. half power CT; 3. main battery; 4. backup battery; 5. solar panel; 6. power board; 7. hinge; 8. DC plug; 9. power switch; 10. half wire trough. DETAILED DESCRIPTION

[0018] As follows, embodiments are further described with reference to the accompanying drawings.

[0019] like Figure 1 to Figure 6 As shown, as a preferred embodiment 1, a power taking device for improving the online rate of distribution automation terminals comprises two openable and closable half boxes 1, wherein the middle positions of the half boxes 1 close to each other on one side are each provided with a half wire groove 10, and when the half boxes 1 are closed to form a complete box, the half wire groove 10 forms a complete wire groove, and wires are coaxially embedded in the wire groove; The complete box is provided with a CT power supply module, a solar power generation module, a control module and a battery module. The CT power supply module and the solar power generation module are connected in parallel, which can make up for the shortcomings of the CT power supply and solar power supply methods, and at the same time can increase the output power and can be installed without power outage. The control module is electrically connected to the battery module, and the battery module includes a main battery 3 and a backup battery 4 connected in parallel with the control module, and the backup battery 4.

[0020] The CT power supply module includes half power supply CT2 respectively arranged in the half boxes 1 on both sides, the half power supply CT2 is symmetrically arranged about the wire groove, and when the half boxes 1 are closed to form a complete box, the half power supply CT2 forms a complete power supply CT, and the complete power supply CT is concentric and coaxial with the wire groove; The solar power generation module comprises a solar panel 5 arranged on the top of the top half box 1; The control module includes a power board 6 disposed in the bottom half box 1 for charging management and power switching, and the solar panel 5 and the power CT are connected in parallel with the power board 6; The battery module includes a main battery 3 and a backup battery 4 connected in parallel with a power board 6 .

[0021] Preferably, the main battery 3 and the backup battery 4 may be lithium iron phosphate batteries, and the battery of the distribution automation terminal may be lead-acid batteries.

[0022] The half boxes 1 are arranged symmetrically, and the corresponding sides of the half boxes 1 form an articulated fit through a hinge 7, and the corresponding other sides of the half boxes form a detachable locking fit through a lock.

[0023] A DC plug 8 is provided at the bottom of the half box 1 on the bottom side. The DC plug 8 is electrically connected to the power board 6, and the DC plug 8 is electrically connected to the battery of the distribution automation terminal through a lead wire.

[0024] A power switch 9 is provided at the bottom of the half box 1 on the bottom side, and the power switch 9 is electrically connected to the power board 6 .

[0025] A plurality of mounting seats are arranged in the half box 1 at the bottom side, and the power board 6 is detachably fastened to the mounting seats by fastening screws.

[0026] As a preferred embodiment 2, the power board 6 is provided with a power-taking regulating protection circuit to adjust and limit the power input to the module in real time, to prevent the absorption of instantaneous large currents caused by special circumstances such as lightning strikes, and to ensure that the module can still output a stable voltage when the current of the power transmission line is unstable. Any existing power-taking regulating protection circuit can be used.

[0027] As a preferred embodiment 3, the power board 6 is also provided with a surge protection and voltage limiting protection circuit to prevent the circuit from being damaged by the impact of large current during lightning strikes and line short circuits. At the same time, the voltage limiting protection circuit is used to prevent the output voltage of the power CT from being too high to damage the subsequent circuit when the primary current is large.

[0028] As a preferred embodiment 4, considering that the current of 10kV lines is relatively large, especially the main lines in cities, the current of CT power supply is selected to be 30A, which can basically adapt to the conductor current.

[0029] As a preferred embodiment 5, a method for using a power taking device for improving the online rate of a distribution automation terminal, using the power taking device to supply power to the distribution automation terminal, comprises the following steps: S1, open half box 1; S2, start the power taking device; S3, hang the power taking device on the wire of the line, arrange the solar power generation module at the top and face upward, embed the wire in the half wire groove 10, close, close and lock the half box 1; S4. The power taking device is electrically connected to the battery of the distribution automation terminal through the lead wire; S5. The power taking device initially uses the CT power taking module to power the battery module. When the output power of the CT power taking module is insufficient, the control module switches to the solar power generation module for power supply. When the output power of the solar power generation module is insufficient, the control module switches to the CT power taking module for power supply. When the output power of the solar power generation module and the output power of the CT power taking module are both insufficient, the control module switches to the CT power taking module and the solar power generation module for power supply at the same time. The power taking device initially supplies power to the battery of the distribution automation terminal through the main battery 3 of the battery module. When the control module in the distribution automation terminal detects insufficient power supply, it sends a signal to the control module of the power taking device and switches to the main battery 3 and the backup battery 4 through the control module of the power taking device to jointly supply power to the battery of the distribution automation terminal.

[0030] In S2, the power taking device is started by turning on the power switch 9.

[0031] In S3, the two half boxes 1 are locked by means of a lock, and the two half boxes 1 are completely fitted together to form a locked fixation.

[0032] The S4 is electrically connected to the battery of the distribution automation terminal through the DC plug 8 and matching leads.

[0033] As a preferred embodiment 6, a test is conducted on solar energy and CT energy in parallel. The output voltage and output power of CT energy will also meet the requirements as the size of the primary line changes, as shown in Table 1: Table 1

[0034] The output power of the power distribution device has been verified, and it can be seen that the device can meet the output power of the FTU, the power of the FTU when it is running, and the power of the battery when it is charging, as shown in Table 2: Table 2

[0035] After the team renovated and rectified all distribution automation terminals for three months, the team conducted statistics on the online status of FTUs. The statistical results are shown in Table 3:

[0036] Through data comparison and observation, the online rate of distribution automation (FTU) has increased from about 75% in July when the energy extraction device was not used to the current 97.17%.

[0037] Social benefits: After this activity, the distribution automation terminal (FTU) was installed without power outages, which solved the online rate of distribution automation and further improved the reliability of distribution network power supply.

Claims

1. A power-taking device for improving the online rate of distribution automation terminals, characterized in that: The invention comprises two half boxes (1) which can be opened and closed, wherein the middle positions of the half boxes (1) on the sides close to each other are each provided with a half wire groove (10); when the half boxes (1) are closed to form a complete box, the half wire groove (10) forms a complete wire groove, and wires are coaxially embedded in the wire groove; The complete box is provided with a CT power supply module, a solar power generation module, a control module and a battery module. The CT power supply module and the solar power generation module are connected in parallel. The control module is electrically connected to the battery module. The battery module includes a main battery (3) and a backup battery (4) connected in parallel with the control module.

2. The power taking device for improving the online rate of distribution automation terminals according to claim 1 is characterized in that: The CT power supply module comprises a half power supply CT (2) respectively arranged in the half boxes (1) on both sides, the half power supply CT (2) being arranged symmetrically with respect to the wire groove, and when the half boxes (1) are closed to form a complete box, the half power supply CT (2) forms a complete power supply CT, and the complete power supply CT is concentric and coaxial with the wire groove; The solar power generation module comprises a solar panel (5) arranged on the top of the top half box (1); The control module comprises a power supply board (6) arranged in the bottom half box (1) and used for charging management and power switching. The solar panel (5) and the power supply CT are connected in parallel with the power supply board (6); The battery module comprises a main battery (3) and a backup battery (4) connected in parallel with a power board (6).

3. The power taking device for improving the online rate of distribution automation terminals according to claim 2 is characterized in that: The half boxes (1) are symmetrically arranged, and the corresponding sides of the half boxes (1) form an articulated fit through a hinge (7), and the corresponding other sides of the half boxes form a detachable locking fit through a lock.

4. The power taking device for improving the online rate of distribution automation terminals according to claim 3 is characterized in that: A DC plug (8) is provided at the bottom of the bottom half of the box (1), the DC plug (8) is electrically connected to the power board (6), and the DC plug (8) is electrically connected to a battery of a distribution automation terminal via a lead wire.

5. The power taking device for improving the online rate of distribution automation terminals according to claim 4 is characterized in that: A power switch (9) is provided at the bottom of the bottom half of the box (1), and the power switch (9) is electrically connected to the power board (6).

6. The power taking device for improving the online rate of distribution automation terminals according to claim 5 is characterized in that: A plurality of mounting seats are provided in the half box (1) on the bottom side, and the power board (6) is detachably fastened to the mounting seats by means of fastening screws.

7. A method for using a power-taking device for improving the online rate of distribution automation terminals, characterized in that: Using the power taking device as claimed in any one of claims 1 to 6 to supply power to a distribution automation terminal comprises the following steps: S1, open the half box (1); S2, start the power taking device; S3, hanging the power taking device on the wire of the line, so that the solar power generation module is located at the top and arranged upward, the wire is embedded in the half wire groove (10) in a fitting manner, and the half box (1) is closed, closed and locked; S4. The power taking device is electrically connected to the battery of the distribution automation terminal through the lead wire; S5. The power taking device initially uses the CT power taking module to power the battery module. When the output power of the CT power taking module is insufficient, the control module switches to the solar power generation module for power supply. When the output power of the solar power generation module is insufficient, the control module switches to the CT power taking module for power supply. When the output power of the solar power generation module and the output power of the CT power taking module are both insufficient, the control module switches to the CT power taking module and the solar power generation module for power supply at the same time. The power taking device initially supplies power to the battery of the distribution automation terminal through the main battery (3) of the battery module. When the control module in the distribution automation terminal detects insufficient power supply, it sends a signal to the control module of the power taking device and switches to the main battery (3) and the backup battery (4) through the control module of the power taking device to jointly supply power to the battery of the distribution automation terminal.

8. The method for using the power taking device for improving the online rate of distribution automation terminals according to claim 7, characterized in that: In S2, the power extraction device is started by turning on the power switch (9).

9. The method for using the power taking device for improving the online rate of distribution automation terminals according to claim 7, characterized in that: In S3, the two half boxes (1) are locked by means of a lock, and the two half boxes (1) are completely fitted together to form a locked fixation.

10. The method for using the power taking device for improving the online rate of distribution automation terminals according to claim 7, characterized in that: The S4 is electrically connected to the battery of the distribution automation terminal via a DC plug (8) and matching leads.

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