CN112165178A - Ground wire induction electricity taking device based on single-phase isolation suppressor - Google Patents
Ground wire induction electricity taking device based on single-phase isolation suppressor Download PDFInfo
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- CN112165178A CN112165178A CN202011004903.9A CN202011004903A CN112165178A CN 112165178 A CN112165178 A CN 112165178A CN 202011004903 A CN202011004903 A CN 202011004903A CN 112165178 A CN112165178 A CN 112165178A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a ground wire induction electricity taking device based on a single-phase isolation suppressor, which comprises the single-phase isolation suppressor, a secondary protection filter loop, a rectification filter loop and a buck-boost conditioning loop, wherein the single-phase isolation suppressor is connected with the rectification filter loop; the single-phase isolation suppressor obtains electricity through ground wire induction, and when the obtained electricity exceeds a set threshold, redundant energy is discharged to the ground; after the electric energy output by the single-phase isolation suppressor is filtered by the secondary protection filtering loop, the electric energy is rectified into direct current by the rectification filtering loop, and the direct current is output and supplied with power by the voltage range regulation of the buck-boost conditioning loop. By adopting the single-phase isolation suppressor, the input range is easy to design and adjust, the transmission ratio in the full input range is high, the self loss is low, the electricity taking efficiency is improved to the maximum extent, the input bottleneck and the heating damage risk caused by the isolation transformer are eliminated, the usability and the application range of the ground wire induction electricity taking device are greatly improved, the popularization and application values of the ground wire induction electricity taking device are improved, and the power supply problem of power transmission line monitoring is solved.
Description
Technical Field
The invention relates to the technical field of power protection, in particular to a ground wire induction electricity taking device based on a single-phase isolation suppressor.
Background
The existing ground wire induction power-taking method includes, as shown in fig. 1, an impact protection unit, an isolation transformer, a secondary protection filter loop, a rectification filter loop, a buck-boost conditioning loop, etc., where an input is an ac signal, the ac signal enters the isolation transformer after being protected and suppressed by the impact protection unit against lightning strike, the isolation transformer performs isolation conversion on the signal, enters the secondary protection filter loop to perform protection processing on the signal so as to prevent a post-stage loop from being damaged, and performs filtering on the signal, the filtered signal enters the rectification filter loop, is converted into a dc signal after being processed by the rectification filter loop, and then is connected to the buck-boost conditioning loop, and the buck-boost conditioning loop performs buck-boost processing according to the voltage level of the input dc signal and conditions the dc signal into a stable dc voltage output.
As shown in fig. 2, when in use, one input end is connected to the overhead ground wire, the other end is connected to the iron tower, which is equivalent to be connected in parallel to both ends of the discharge gap, and the input signal is an alternating current signal; because the lightning protection and suppression are required to be considered when the power supply is connected to the ground, the damage and the influence on the normal work of a post-stage loop caused by lightning stroke, lightning electromagnetic pulse and transient overvoltage are prevented; because the load on the line has a wide variation range, the input alternating current signal is in positive correlation with the line load, the variation range is wide, from a few volts to hundreds of volts, wide-range signal processing needs to be considered for a rear-stage loop and elements, and after the processing, the rear-stage loop can be protected from being damaged, and can be converted into a stable direct current signal to be output, so that electric energy supply is provided for loads such as a (special) high-voltage transmission line monitoring device.
The existing scheme adopts an isolation transformer scheme when input signals are inhibited and isolated. Due to the limitation of principles, process materials and the like, on one hand, the range of processable signals and the volume of the isolation transformer are closely related, the wider the range of processable signals is, the larger the volume is, and the range of processable signals is limited under the proper volume; on the other hand, the transformer can only keep relatively high transmission efficiency for signals in a very narrow range of the rated input signal, and when the transmission efficiency is beyond the range, the transmission efficiency is seriously reduced. There is also a scheme of using a multi-transformation-ratio isolation transformer, but a control selection loop is needed to select a proper transformation ratio according to input, and an adjustment signal is in a range of the isolation transformer with high transmission efficiency, but the control selection loop is difficult and complex to implement, and the self-consumption is increased, so that the power taking efficiency is reduced, and the usability and the application range are greatly influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a ground wire induction power taking device based on a single-phase isolation suppressor, wherein the single-phase isolation suppressor is adopted to replace an isolation transformer part, and the function of an impact protection unit is integrated.
In order to achieve the aim, the invention provides a ground wire induction electricity taking device based on a single-phase isolation suppressor, which comprises the single-phase isolation suppressor, a secondary protection filtering loop, a rectification filtering loop and a buck-boost conditioning loop, wherein the boost conditioning loop is connected with the single-phase isolation suppressor;
the single-phase isolation suppressor obtains electricity through ground wire induction, and when the obtained electricity exceeds a set threshold, redundant energy is discharged to the ground;
after the electric energy output by the single-phase isolation suppressor is filtered by the secondary protection filtering loop, the electric energy is rectified into direct current by the rectification filtering loop, and the direct current is output and supplied with power by the voltage range regulation of the buck-boost conditioning loop.
Further, the single-phase isolation suppressor comprises an energy taking unit, a first-stage discharge circuit, a second-stage discharge circuit and a third-stage discharge circuit;
the energy taking unit is connected in parallel with the ground wire and two ends of a discharge gap on the iron tower;
the first-stage discharge loop is connected with the electric energy obtained by the energy obtaining unit;
the two ends of the first-stage discharge loop and the second-stage discharge loop are respectively connected through decoupling inductors;
the two ends of the second-stage discharge loop and the third-stage discharge loop are respectively connected through decoupling inductors;
the low-pressure ends of the first, second and third stage discharge circuits are connected with a grounding device.
Further, the first, second and third-stage bleeder circuits each comprise a varistor and a gas discharge tube connected in series.
And the isolated acquisition communication loop is used for acquiring the input voltage and the output voltage of the buck-boost conditioning loop and sending the input voltage and the output voltage to the upper computer for monitoring according to a preset time interval, and when the input voltage or the output voltage is higher than or lower than a set threshold value, the input voltage or the output voltage value is immediately and actively sent to the upper computer.
Furthermore, the system also comprises a super capacitor or a storage battery and a charge and discharge management loop;
the super capacitor or the storage battery is connected to the output end of the buck-boost conditioning loop in parallel;
when the output voltage of the buck-boost conditioning loop meets the requirement of a power supply threshold, the charge and discharge management loop closes the power supply of the super capacitor or the storage battery, and the buck-boost conditioning loop outputs power supply; and when the output voltage of the buck-boost conditioning loop is lower than the requirement of the power supply threshold, the charge and discharge management loop starts the super capacitor or the storage battery to supply power for auxiliary power supply output.
Furthermore, the buck-boost conditioning loop adopts a 12V device, and the output voltage range is 10-15V, or adopts a 24V device to output voltage range 20-30V.
Further, the charge and discharge management loop controls the super capacitor or the storage battery to be charged with low current when the output voltage is monitored to be in the normal output range and higher than the super capacitor or the storage battery.
Further, the charging and discharging management loop acquires the output voltage of the voltage-boosting and voltage-reducing conditioning loop through the isolation acquisition communication loop and judges whether the output voltage is lower than the power supply threshold requirement.
The technical scheme of the invention has the following beneficial technical effects:
by adopting the single-phase isolation suppressor, the input range is easy to design and adjust, the transmission ratio in the full input range is high, the self loss is low, the electricity taking efficiency is improved to the maximum extent, the input bottleneck and the heating damage risk caused by the isolation transformer are eliminated, the usability and the application range of the ground wire induction electricity taking device are greatly improved, the popularization and application values of the ground wire induction electricity taking device are improved, and the power supply problem of power transmission line monitoring is solved.
Drawings
FIG. 1 is a schematic diagram of a conventional ground wire induction power supply;
FIG. 2 is a schematic diagram of a conventional ground wire inductive connection;
FIG. 3 is a schematic diagram of an embodiment of a ground line induction power method of the single-phase isolation suppressor;
FIG. 4 is a schematic diagram illustrating a ground line induction power method of the single-phase isolation suppressor according to yet another embodiment;
fig. 5 is a schematic diagram of the principle of a single-phase isolation suppressor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The invention relates to a ground wire induction electricity taking device based on a single-phase isolation suppressor, which comprises the single-phase isolation suppressor, a secondary protection filter circuit, a rectification filter circuit, a buck-boost conditioning circuit and the like, as shown in figure 3. The single-phase isolation suppressor obtains electricity through ground wire induction, and when the obtained electricity exceeds a set threshold, redundant energy is discharged to the ground; after the electric energy output by the single-phase isolation suppressor is filtered by the secondary protection filtering loop, the electric energy is rectified into direct current by the rectification filtering loop, and the direct current is output and supplied with power by the voltage range regulation of the buck-boost conditioning loop.
Compared with the existing power taking mode, the power taking method has the advantages that a single-phase isolation suppressor is adopted to replace an isolation transformer part, and the function of an impact protection unit is integrated. By adopting the single-phase isolation suppressor, the input range is easy to design and adjust, the transmission ratio in the full input range is high, the self loss is low, the electricity taking efficiency is improved to the maximum extent, the input bottleneck and the heating damage risk caused by the isolation transformer are eliminated, the usability and the application range of the ground wire induction electricity taking device are greatly improved, the popularization and application values of the ground wire induction electricity taking device are improved, and the power supply problem of power transmission line monitoring is solved.
The energy taking unit obtains electric energy from two ends of a discharge gap which is connected in parallel with the ground wire and the iron tower, when the line normally runs, charges can be accumulated at two ends of the discharge gap, and the energy taking unit can obtain the electric energy after being connected in parallel with two ends of the discharge gap, such as a loop, so as to supply power for a rear-stage load.
The output voltage range of the 12V specification device of the buck-boost conditioning loop is 10-15V, and the output voltage range of the 24V specification device is 20-30V.
As shown in fig. 4, an isolated acquisition communication loop may be added to externally output operation parameters to monitor an operation state, input control parameters, adjust operation parameters, and the like. The input voltage and the output voltage of the buck-boost conditioning loop are collected and sent to an upper computer for monitoring according to a preset time interval, and when the input voltage or the output voltage is higher than or lower than a set threshold value, the input voltage or the output voltage value is immediately and actively sent to the upper computer.
The super capacitor/storage battery and a charge and discharge management loop thereof can be added, and the stability and the continuity of the output voltage are improved. And the charging and discharging management loop acquires the output voltage of the buck-boost conditioning loop through the isolation acquisition communication loop and judges whether the output voltage is lower than the requirement of a power supply threshold. And the charge and discharge management circuit controls the super capacitor or the storage battery to be charged with low current when monitoring that the output voltage is in a normal output range and higher than the super capacitor or the storage battery.
The single-phase isolation suppressor has the main function of being quickly conducted when overvoltage and overcurrent exceeding design indexes occur, and releasing energy to the ground through the discharge circuit so as to protect a rear-stage circuit from being damaged by instantaneous energy. The principle is shown in fig. 5: the high-voltage power supply mainly comprises three stages of first-stage bleeder circuits RV1 and G1, second-stage bleeder circuits RV2 and G2, third-stage bleeder circuits RV3 and G3, first-stage decoupling L1 and L2, second-stage decoupling L3 and L4 two-stage decoupling coil circuits, wherein the three stages of the first-stage bleeder circuits and the second-stage bleeder circuits are connected with an input port in parallel. The first-stage decoupling coil is used for ensuring that the first-stage discharge circuit is conducted before the second-stage discharge circuit when lightning surge occurs, the flow rate of the first-stage discharge circuit is maximum, the discharge energy capacity is strongest, and after residual energy after the first-stage discharge is released by the two latter-stage discharge circuits in sequence, the energy entering the latter-stage circuit meets the design index requirements and cannot damage the latter-stage circuit. G1-G3 are gas discharge tubes, and RV 1-3 are piezoresistors.
The three-stage isolation suppression technology is adopted, the high-impedance characteristic of the lightning surge pulse is realized, the lightning surge pulse is forced to be discharged into the grounding device through the discharge unit, and meanwhile, the isolation suppression grounding device realizes extremely low residual voltage so as to prevent high ground potential from counterattacking and entering a rear-stage protected loop; the piezoresistor adopts a zinc oxide valve type technology to realize zero leakage current, can ensure that all three loops of the single-phase isolated suppressor are broken down under extreme conditions without leakage current, and has the same effect as an isolation transformer; the damage to the ground wire power-taking circuit of the high-voltage iron tower and a communication power supply system caused by lightning stroke, lightning electromagnetic pulse and transient overvoltage can be prevented, the damage to the ground wire power-taking circuit of the high-voltage iron tower is avoided, and the power can be normally output.
The isolated acquisition is added, and the primary input voltage and the voltage conditioned by the voltage regulating loop are mainly acquired, transmitted to an external debugging terminal through a communication loop and subjected to reference analysis by a developer, so that design effect evaluation and optimization are carried out; the collected operation parameters can be transmitted to a remote monitoring main station through a rear-stage load such as a line monitoring terminal, so that operation and maintenance personnel can master the operation state of the equipment and the like. And receiving parameters such as output voltage selection control parameters, information sending intervals and the like of the device, which are issued by the debugging terminal or the remote monitoring master station. According to the working principle of induction power taking, when the input voltage is lower than a design value, the induction power taking is not enough to maintain output, or when the input voltage is higher than a set value, the induction power taking is in a protection state and has no output voltage, and at the moment, if a load at the later stage is equipment which cannot be interrupted by a power supply, a super capacitor or a storage battery needs to be configured to supply power, so that the voltage is kept to be stably output; when the input voltage is in the normal design range, the power supply of the super capacitor or the storage battery is turned off, the power supply returns to the main loop, and the super capacitor or the storage battery is charged while the load is electrified; therefore, normal output can be ensured when the short-time input exceeds the range, and the stability and the discontinuity of the output voltage of the induction power taking method can be improved.
In summary, the present invention provides a ground wire induction power-taking device based on a single-phase isolation suppressor, which includes a single-phase isolation suppressor, a secondary protection filter loop, a rectification filter loop and a buck-boost conditioning loop; the single-phase isolation suppressor obtains electricity through ground wire induction, and when the obtained electricity exceeds a set threshold, redundant energy is discharged to the ground; after the electric energy output by the single-phase isolation suppressor is filtered by the secondary protection filtering loop, the electric energy is rectified into direct current by the rectification filtering loop, and the direct current is output and supplied with power by the voltage range regulation of the buck-boost conditioning loop. By adopting the single-phase isolation suppressor, the input range is easy to design and adjust, the transmission ratio in the full input range is high, the self loss is low, the electricity taking efficiency is improved to the maximum extent, the input bottleneck and the heating damage risk caused by the isolation transformer are eliminated, the usability and the application range of the ground wire induction electricity taking device are greatly improved, the popularization and application values of the ground wire induction electricity taking device are improved, and the power supply problem of power transmission line monitoring is solved.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (8)
1. A ground wire induction electricity taking device based on a single-phase isolation suppressor is characterized by comprising the single-phase isolation suppressor, a secondary protection filter loop, a rectification filter loop and a buck-boost conditioning loop;
the single-phase isolation suppressor obtains electricity through ground wire induction, and when the obtained electricity exceeds a set threshold, redundant energy is discharged to the ground;
after the electric energy output by the single-phase isolation suppressor is filtered by the secondary protection filtering loop, the electric energy is rectified into direct current by the rectification filtering loop, and the direct current is output and supplied with power by the voltage range regulation of the buck-boost conditioning loop.
2. The ground wire induction electricity taking device based on the single-phase isolation suppressor as claimed in claim 1, wherein the single-phase isolation suppressor comprises an energy taking unit, a first-stage bleeder circuit, a second-stage bleeder circuit and a third-stage bleeder circuit;
the energy taking unit is connected in parallel with the ground wire and two ends of a discharge gap on the iron tower;
the first-stage discharge loop is connected with the electric energy obtained by the energy obtaining unit;
the two ends of the first-stage discharge loop and the second-stage discharge loop are respectively connected through decoupling inductors;
the two ends of the second-stage discharge loop and the third-stage discharge loop are respectively connected through decoupling inductors;
the low-pressure ends of the first, second and third stage discharge circuits are connected with a grounding device.
3. The single-phase isolation suppressor-based ground wire induction power taking device as claimed in claim 2, wherein the first, second and third-stage bleeder circuits each comprise a varistor and a gas discharge tube connected in series.
4. The ground wire induction power taking device based on the single-phase isolation suppressor as claimed in claim 2, further comprising an isolation acquisition communication loop, wherein the isolation acquisition communication loop acquires input and output voltages of the buck-boost conditioning loop and sends the input and output voltages to the upper computer for monitoring according to a preset time interval, and when the input voltage or the output voltage is higher than or lower than a set threshold value, the input voltage or the output voltage value is immediately and actively sent to the upper computer.
5. The ground wire induction electricity taking device based on the single-phase isolation suppressor as claimed in claim 4, characterized by further comprising a super capacitor or a storage battery and a charge and discharge management loop;
the super capacitor or the storage battery is connected to the output end of the buck-boost conditioning loop in parallel;
when the output voltage of the buck-boost conditioning loop meets the requirement of a power supply threshold, the charge and discharge management loop closes the power supply of the super capacitor or the storage battery, and the buck-boost conditioning loop outputs power supply; and when the output voltage of the buck-boost conditioning loop is lower than the requirement of the power supply threshold, the charge and discharge management loop starts the super capacitor or the storage battery to supply power for auxiliary power supply output.
6. The ground wire induction electricity taking device based on the single-phase isolation suppressor as claimed in claim 5, wherein the voltage boosting and reducing conditioning loop adopts a 12V device, and the output voltage range is 10-15V, or adopts a 24V device, and the output voltage range is 20-30V.
7. The ground wire induction electricity taking device based on the single-phase isolation suppressor as claimed in claim 5, wherein the charge and discharge management circuit controls the super capacitor or the storage battery to be charged with a small current when monitoring that the output voltage is in a normal output range and higher than the super capacitor or the storage battery.
8. The ground wire induction power taking device based on the single-phase isolation suppressor as claimed in claim 5, wherein the charging and discharging management loop obtains the output voltage of the buck-boost conditioning loop through the isolation acquisition communication loop and judges whether the output voltage is lower than a power supply threshold requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011004903.9A CN112165178A (en) | 2020-09-23 | 2020-09-23 | Ground wire induction electricity taking device based on single-phase isolation suppressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011004903.9A CN112165178A (en) | 2020-09-23 | 2020-09-23 | Ground wire induction electricity taking device based on single-phase isolation suppressor |
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| CN202011004903.9A Pending CN112165178A (en) | 2020-09-23 | 2020-09-23 | Ground wire induction electricity taking device based on single-phase isolation suppressor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110299210A1 (en) * | 2010-06-02 | 2011-12-08 | Anmax Lightning Technology Corp. | Serially connected surge suppression optimization device |
| CN204030571U (en) * | 2014-07-11 | 2014-12-17 | 成都兴业雷安电子有限公司 | The AC and DC power supply lightning protection device of the wide-voltage range of the large low residual voltage of discharge capacity |
| CN104979853A (en) * | 2015-07-10 | 2015-10-14 | 国家电网公司 | Power transmission line sectioned insulating overhead ground wire multi-point power accessing system based on electromagnetic induction |
| CN106300554A (en) * | 2016-09-30 | 2017-01-04 | 国网湖南省电力公司 | Transmission line of electricity based on high pressure power taking distributed mountain fire monitoring device power supply management system and method |
-
2020
- 2020-09-23 CN CN202011004903.9A patent/CN112165178A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110299210A1 (en) * | 2010-06-02 | 2011-12-08 | Anmax Lightning Technology Corp. | Serially connected surge suppression optimization device |
| CN204030571U (en) * | 2014-07-11 | 2014-12-17 | 成都兴业雷安电子有限公司 | The AC and DC power supply lightning protection device of the wide-voltage range of the large low residual voltage of discharge capacity |
| CN104979853A (en) * | 2015-07-10 | 2015-10-14 | 国家电网公司 | Power transmission line sectioned insulating overhead ground wire multi-point power accessing system based on electromagnetic induction |
| CN106300554A (en) * | 2016-09-30 | 2017-01-04 | 国网湖南省电力公司 | Transmission line of electricity based on high pressure power taking distributed mountain fire monitoring device power supply management system and method |
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Application publication date: 20210101 |