CN109659949A - A kind of comprehensive lifting device of low-voltage circuit voltage power-less - Google Patents
A kind of comprehensive lifting device of low-voltage circuit voltage power-less Download PDFInfo
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- CN109659949A CN109659949A CN201710947687.3A CN201710947687A CN109659949A CN 109659949 A CN109659949 A CN 109659949A CN 201710947687 A CN201710947687 A CN 201710947687A CN 109659949 A CN109659949 A CN 109659949A
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- 230000033228 biological regulation Effects 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 2
- 230000007812 deficiency Effects 0.000 abstract description 5
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- 238000012797 qualification Methods 0.000 description 3
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Classifications
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1878—Arrangements for adjusting, eliminating or compensating reactive power in networks using tap changing or phase shifting transformers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention discloses a kind of comprehensive lifting device of low-voltage circuit voltage power-less; including auto-transformer, series transformer, on-load voltage regulating switch, compensation capacitor, fling-cut switch, bypass protection switch, circuit switching, controller, current transformer, voltage detecting point, arrester, breaker; auto-transformer, on-load voltage regulating switch, series transformer are fused into one, the adjustment of the voltage under device band load condition is realized；The reactive compensation of compensation capacitor is mixed, realizes voltage, idle structure adjusting；Bypass protection is equipped in device to switch; in the case where it is zero that overload situations or on-load voltage regulating switch, which are in lowest gear, that is, auto-transformer output voltage; side open protective switch by low-voltage circuit auto-transformer and series transformer short circuit; circuit switching disconnects, and avoids damage device or increases line loss because of device itself；Device is equipped with controller and can realize with low-voltage circuit load variations progress voltage, idle adjust automatically, efficiently solves the problems, such as that terminal voltage caused by low-voltage circuit radius of electricity supply length, idle deficiency is low.
Description
Technical field
The present apparatus is related to power product technical field, is promoted in particular to a kind of low-voltage circuit voltage power-less is comprehensive
Device.
Background technique
With the raising of social economy and living standards of the people, the requirement to power quality is higher and higher, especially rural area
The power supply of the electricity consumption that area rapidly increases, current power distribution network mismatches therewith again with structure, causes rural area " low-voltage " problem
Seriously, " low-voltage " complains situation extremely universal, solves the problems, such as that " low-voltage " is extremely urgent.
Currently, the effective measures of rural area " low-voltage " problem of being directed to: the distribution transformer of no excitation being replaced with negative in band
The load tap changing distribution transformer of energy automatic Regulation, guarantees the stabilization and qualification of supply voltage in the case of lotus, but for power grid
It is more than economic power supply radius, " point more than long lines ", line powering half that the area of framework weakness, which still remains low-voltage circuit for electrical length,
Path length, idle deficiency cause line end voltage low, therefore, it is necessary to promote low-voltage circuit voltage, balance idle, guarantee route
The qualification of terminal voltage.Traditional promotion low-voltage circuit voltage system is to install low-pressure regulator or reactive voltage lifting device,
But it cannot carry out voltage increase or idle adjustment with the variation of power load, so that the low problem of line end voltage is not
It can obtain effective solution.
Summary of the invention
The object of the present invention is to provide a kind of comprehensive lifting devices of low-voltage circuit voltage power-less, to solve institute in background technique
The problem of proposition.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of comprehensive lifting device of low-voltage circuit voltage power-less, which is characterized in that including auto-transformer, series transformer, benefit
Repay capacitor, on-load voltage regulating switch, fling-cut switch, bypass protection switch, circuit switching, controller, current transformer, voltage inspection
Measuring point, arrester, breaker；
The breaker is series in low-voltage circuit, and the breaker disconnects, and device will power off, and disconnect the company with low-voltage circuit
It connects；
The auto-transformer is parallel in low-voltage circuit, and the auto-transformer is connect with the on-load voltage regulating switch, is taken out
Head gear connection corresponding to the on-load voltage regulating switch, can be become by self coupling described in the on-load voltage regulating switch gear changing of transformation
Transformer voltage ratio changes auto-transformer output voltage；
The auto-transformer output end is connect with the series transformer, and the auto-transformer is that the series transformer mentions
Voltage supplied, the series transformer are series in low-voltage circuit；
The compensation capacitor is parallel to low-voltage line by the protective breaker of the fling-cut switch and the compensation capacitor
Lu Zhong；
The bypass protection switch in parallel is in the both ends of the auto-transformer and the series transformer link circuit, and described time
Way switch is connect with the auto-transformer, is parallel in low-voltage circuit；
The current transformer is series in the low-voltage circuit of device input terminal, and the voltage detecting point is located at device input terminal
On low-voltage circuit；
The controller and the current transformer, the voltage detecting point, the on-load voltage regulating switch, the fling-cut switch,
The bypass protection switch, the circuit switching are all connected with.
A preferred embodiment of the invention, controller set pressure regulation, compensation, protection control are described
Controller receives the current transformer, the electric current of the voltage detecting point, voltage signal, after analysis is handled, sends voltage
Control signal to the on-load voltage regulating switch, transmission compensating control signal to the fling-cut switch carries out the compensation capacitor
Investment or cutting, send protection control signal to the bypass protection switch, the circuit switching, make its it is corresponding switch move
Make, carries out voltage, idle, protection adjustment movement.
A preferred embodiment of the invention, when device operates normally, the bypass protection switch is in disconnection
State, the circuit switching are in closed state；When the current transformer detects low-voltage circuit overcurrent or on-load voltage regulation
When switch operation to lowest gear, that is, auto-transformer output voltage is zero, the controller issues control information, makes described
Bypass protection closes the switch, and the circuit switching disconnects, and by device short circuit and disconnects；When the current transformer detects low pressure
When line current restores normal, on-load voltage regulating switch and need to run to other gears, the controller issues control signal, makes described
Bypass protection switch disconnects, the circuit switching is closed, and device restores to operate normally.
A preferred embodiment of the invention, in normal operation, the knot that the controller is handled according to analysis
Fruit, selection send voltage adjustment control signal or the control of reactive power compensating signal, preferential to send out when line electricity is forced down, is idle insufficient
The control of reactive power compensating signal is sent, if voltage is still low, voltage adjustment control signal is retransmited and carries out voltage adjustment；Work as line voltage distribution
When high, idle deficiency, the preferential voltage adjustment control signal that sends turns down voltage, and it is idle to retransmit the progress of the control of reactive power compensating signal
Compensation.
Compared with the existing technology, the beneficial effects of the invention are as follows realize the comprehensive lifting device of low-voltage circuit voltage power-less to exist
In the case of uninterrupted power supply, with the voltage adjustment and reactive compensation of user power utilization load variations, low-voltage circuit can be effectively solved
The low problem of terminal voltage caused by radius of electricity supply length, idle deficiency, cooperation load tap changing distribution transformer carry out " low-voltage "
It administers, supply voltage qualification rate can be made to reach 100%.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of the comprehensive lifting device of low-voltage circuit voltage power-less of the present invention.
Fig. 2 is a kind of control system schematic diagram of the comprehensive lifting device of low-voltage circuit voltage power-less of the present invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Embodiment discussed below is only used for more clearly from
Illustrate technical solution of the present invention, be the selected embodiment of the present invention, rather than whole embodiments, cannot be limited with this
Protection scope of the present invention processed.Those skilled in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention discloses a kind of comprehensive lifting device of low-voltage circuit voltage power-less, including auto-transformer 1, string
Join transformer 2, on-load voltage regulating switch 3, compensation capacitor 4, fling-cut switch 5, bypass protection switch 6, circuit switching 7, controller
8, current transformer 9, voltage detecting point 10, arrester 11, breaker 12；
Breaker 12 is series in low-voltage circuit, if breaker 12 disconnects, whole device will be powered off, and be disconnected and low-voltage circuit
Connection；
Auto-transformer 1 is parallel in low-voltage circuit, and auto-transformer 1 is connect with on-load voltage regulating switch 3, and tap is adjusted with there is load
Compress switch 3 corresponding gear connections, can switch gear by on-load voltage regulating switch 3 and change 1 no-load voltage ratio of auto-transformer, change self coupling and become
1 output voltage of depressor；1 output end of auto-transformer is connect with series transformer 2, provides voltage for series transformer 2, series connection becomes
Depressor 2 is series in low-voltage circuit；Protective breaker (the diagram that compensation capacitor 4 passes through fling-cut switch 5 and compensation capacitor
QF2 it) is parallel in low-voltage circuit；Bypass protection switch 6 is parallel to the two of auto-transformer 1 and 2 link circuit of series transformer
End；Circuit switching 7 is connect with auto-transformer 1, and is parallel in low-voltage circuit；Current transformer 9 is series at device input terminal
Low-voltage circuit in, voltage detecting point 10 is located on the low-voltage circuit of device input terminal.
Referring to fig. 2, controller 8 has gathered pressure regulation, compensation, protection control, and controller 8 is opened with on-load voltage regulating switch 3, switching
5, bypass protection switch 6, circuit switching 7, current transformer 9, voltage detecting point 10 is closed to be all connected with；It is mutual that controller 8 receives electric current
Sensor 9, the electric current of voltage detecting point 10, voltage signal send voltage control signal to on-load voltage regulating switch after analysis is handled
3, investment or cutting, transmission protection control signal to side that compensating control signal to fling-cut switch 5 controls compensation capacitor 4 are sent
Road protective switch 6 and circuit switching 7 make its corresponding switch motion, carry out voltage, idle, protection adjustment movement.
Referring to Fig. 1, Fig. 2, when device operates normally, bypass protection switch 6 is in an off state, and circuit switching 7 is in and closes
Conjunction state；When current transformer 9 detects that low-voltage circuit overcurrent or the operation of on-load voltage regulating switch 3 to lowest gear i.e. self coupling become
When the output voltage of depressor 1 is zero, controller 8 issues control information, is closed bypass protection switch 6, and circuit switching 7 disconnects,
By device short circuit and disconnect；Restore normal, on-load voltage regulating switch 3 when controller 8 receives the current signal that current transformer 9 inputs
When need to run to other gears, controller 8 issues control signal, disconnects bypass protection switch 6, the closure of circuit switching 7, device
Restore to operate normally.
In normal operation, controller 8 according to current transformer 9, voltage detecting point 10 input electric current, voltage signal into
Row analysis processing, selection sends voltage adjustment control signal or the control of reactive power compensating signal, when line electricity is forced down, idle deficiency
When, the preferential the control of reactive power compensating signal input compensation capacitor 4 that sends carries out reactive compensation and the promotion of voltage, if voltage is still
Low, retransmiting voltage adjustment control signal makes on-load voltage regulating switch 3 switch gear raising voltage；When line voltage distribution it is high, it is idle not
When sufficient, the preferential voltage adjustment control signal that sends makes the switching gear of on-load voltage regulating switch 3 turn down voltage, retransmits reactive compensation control
Signal input compensation capacitor 4 processed carries out reactive compensation.
The above is only a preferred embodiment of the present invention, it is noted that those skilled in the art are come
It says, without departing from the technical principles of the invention, several changes and improvements can also be made, these changes and improvements are also answered
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of comprehensive lifting device of low-voltage circuit voltage power-less, which is characterized in that including auto-transformer, series transformer,
Compensation capacitor, on-load voltage regulating switch, fling-cut switch, bypass protection switch, circuit switching, controller, current transformer, voltage
Test point, arrester, breaker；
The breaker is series in low-voltage circuit, and the breaker disconnects, and device will power off, and disconnect the company with low-voltage circuit
It connects；
The auto-transformer is parallel in low-voltage circuit, and the auto-transformer is connect with the on-load voltage regulating switch, is taken out
Head gear connection corresponding to the on-load voltage regulating switch, can be become by self coupling described in the on-load voltage regulating switch gear changing of transformation
Transformer voltage ratio changes auto-transformer output voltage；
The auto-transformer output end is connect with the series transformer, and the auto-transformer is that the series transformer mentions
Voltage supplied, the series transformer are series in low-voltage circuit；
The compensation capacitor is parallel to low-voltage line by the protective breaker of the fling-cut switch and the compensation capacitor
Lu Zhong；
The bypass protection switch in parallel is in the both ends of the auto-transformer and the series transformer link circuit, and described time
Way switch is connect with the auto-transformer, is parallel in low-voltage circuit；
The current transformer is series in the low-voltage circuit of device input terminal, and the voltage detecting point is located at device input terminal
On low-voltage circuit；
The controller and the current transformer, the voltage detecting point, the on-load voltage regulating switch, the fling-cut switch,
The bypass protection switch, the circuit switching are all connected with.
2. the comprehensive lifting device of a kind of low-voltage circuit voltage power-less according to claim 1, which is characterized in that the control
The pressure regulation of device set, compensation, protection control, the controller receive the current transformer, the voltage detecting point electric current,
Voltage signal sends voltage control signal to the on-load voltage regulating switch, transmission compensating control signal to institute after analysis is handled
State fling-cut switch carry out the compensation capacitor investment or cutting, send protection control signal to the bypass protection switch,
The circuit switching makes its corresponding switch motion, carries out voltage, idle, protection adjustment movement.
3. the comprehensive lifting device of a kind of low-voltage circuit voltage power-less according to claim 1 or 2, which is characterized in that device
When normal operation, the bypass protection switch is in an off state, and the circuit switching is in closed state；When the electric current is mutual
Sensor detects that low-voltage circuit overcurrent or on-load voltage regulating switch are run to the lowest gear i.e. output voltage of auto-transformer
When zero, the controller issues control information, closes the switch the bypass protection, and the circuit switching disconnects, and device is short
Road simultaneously disconnects；When the current transformer detects that low-voltage circuit electric current restores normal, on-load voltage regulating switch need to be run to other
When gear, the controller issues control signal, disconnects the bypass protection switch, circuit switching closure, and device is extensive
It is multiple to operate normally.
4. the comprehensive lifting device of a kind of low-voltage circuit voltage power-less according to claim 1 or 2, which is characterized in that just
Often in operation, the controller is according to analysis processing as a result, selection sends voltage adjustment control signal or the control of reactive power compensating
Signal, when line electricity is forced down, is idle insufficient, preferential transmission the control of reactive power compensating signal retransmits voltage if voltage is still low
Adjustment control signal carries out voltage adjustment；When line voltage distribution is high, idle insufficient, the preferential voltage adjustment control signal that sends is turned down
Voltage retransmits the control of reactive power compensating signal and carries out reactive compensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947687.3A CN109659949A (en) | 2017-10-12 | 2017-10-12 | A kind of comprehensive lifting device of low-voltage circuit voltage power-less |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947687.3A CN109659949A (en) | 2017-10-12 | 2017-10-12 | A kind of comprehensive lifting device of low-voltage circuit voltage power-less |
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| Publication Number | Publication Date |
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| CN109659949A true CN109659949A (en) | 2019-04-19 |
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|---|---|---|---|
| CN201710947687.3A Pending CN109659949A (en) | 2017-10-12 | 2017-10-12 | A kind of comprehensive lifting device of low-voltage circuit voltage power-less |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541228A (en) * | 2020-05-07 | 2020-08-14 | 国网湖南省电力有限公司 | Device and method for modulating electric energy parameters of low-voltage line tail end of power distribution station area |
| CN112951572A (en) * | 2021-01-27 | 2021-06-11 | 深圳市深龙达电器有限公司 | Electromagnetic high-low voltage compensation current transformer |
| CN113644662A (en) * | 2021-08-16 | 2021-11-12 | 普泰克电力有限公司 | Low-voltage lifting method for rural power grid tail end |
| CN113890046A (en) * | 2021-09-30 | 2022-01-04 | 华能伊敏煤电有限责任公司 | Open coal mine 35kV distribution lines quick voltage regulation system |
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| CN113890046A (en) * | 2021-09-30 | 2022-01-04 | 华能伊敏煤电有限责任公司 | Open coal mine 35kV distribution lines quick voltage regulation system |
| CN113890046B (en) * | 2021-09-30 | 2023-04-11 | 华能伊敏煤电有限责任公司 | Open coal mine 35kV distribution lines quick voltage regulation system |
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