CN108964074A - A kind of capacitor low-voltage dynamic reactive power compensation - Google Patents
A kind of capacitor low-voltage dynamic reactive power compensation Download PDFInfo
- Publication number
- CN108964074A CN108964074A CN201810596391.6A CN201810596391A CN108964074A CN 108964074 A CN108964074 A CN 108964074A CN 201810596391 A CN201810596391 A CN 201810596391A CN 108964074 A CN108964074 A CN 108964074A
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- Prior art keywords
- capacitor
- intelligent
- module
- voltage
- reactive power
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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
- H02J3/18—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
-
- 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)
Abstract
The present invention provides a kind of capacitor low-voltage dynamic reactive power compensation, including cabinet body, controller, air switch, arrester, intelligent capacitor, fuse and intelligent capacitor, controller is connected in parallel on the output end of electric system, it is connected with arrester on air switch in turn, fuse and intelligent capacitor, combination switch is connected on controller, intelligent measure and control module on intelligent capacitor is connected on high-quality capacitor and fling-cut switch module, route protection module with high-quality capacitor, intelligent measure and control module, fling-cut switch module is connected to human-computer interface module, human-computer interface module is connect with fling-cut switch module and intelligent measure and control module, controller is for analyzing this data information inside electric system and compensation branch and intelligent capacitor and issuing capacitor throwing, it cuts and various protection early warning, the operation of movement etc. refers to It enables.The solution of the present invention can be realized dynamic passive compensation to 0.4kV grades of power grids, improve power supply quality.
Description
Technical field
The present invention relates to electric power low-pressure distribution technical fields, and in particular to a kind of capacitor is filled with low voltage dynamic reactive-power compensation
It sets.
Background technique
As the nonlinear-loads such as modern power electronics devices largely access power grid, make grid supply quality by serious shadow
It rings, wherein the frequent fluctuation of extensive application and the load of various electronic power switch devices is most important interference source, it is caused
A series of adverse effects.Grid voltage quality usually uses the indexs such as stability symmetry and sine to measure.
1. with increasing for the nonlinear loads such as frequency converter, electric welding machine, Switching Power Supply, the harmonic wave that is generated in power supply-distribution system
It measures larger.
2. in Chengjiao Coal Preparation Plant capacitor compensation cabinet, Harmonics amplification, switch element are caused without current-limiting reactor in capacitor front end
The resistant to flow deficiency of capacitor causes failure easily to send out.Harmonic wave mainly has the influence of following aspect to compensation capacitor.
(1) capacitor overcurrent is caused.Rated capacitor electric current (I1) and the harmonic current (Ih) for flowing into capacitor, capacitor
Full-load current I1=100% when device is run, and when external harmonic current, if running current is greater than 1.3 times of rated current, electricity
Container is by rapid failure.
(2) parallel resonance is generated with system.Transmission of electricity and distribution system design and operation frequency-invariant sine voltage and
Under electric current, when a large amount of nonlinear-load hanging net operation, serious voltage distortion and current distortion will be generated in power grid.At this time
Harmonic source be equivalent to a very big current source, the harmonic current generated be added in system induction reactance and capacitor capacitive reactance it
Between, form shunt circuit.When network system induction reactance is equal to capacitive reactance capacitor, parallel resonance will be formed.Shunt circuit is total at this time
Impedance is equal to infinity, when harmonic current flows through the circuit of impedance infinity, will generate infinitely great harmonic voltage, infinitely great
Harmonic voltage will generate high current between power grid and capacitor, cause the rapid failure of capacitor.
(3) series resonance is generated with system.If voltage generates humorous in upper level network system there are serious harmonic source
When wave distortion is quite serious.Harmonic source is equivalent to a very big voltage source at this time, and background harmonic voltage will be in the short of transformer
The capacitive reactance of road inductance and capacitor forms series loop.When series loop total impedance is equal to zero, series resonance will be formed.At this time
Harmonic voltage will form powerful electric current directly through compensation capacitor group in series loop, keep capacitor fast because of overcurrent
Fast failure, while increasing influence of the harmonic wave to power grid.
3. capacitor temperature rank is B grades, temperature grade is low, in addition without the radiators such as axial flow blower, temperature Gao Shi electricity
The decaying of container capacitance is very fast, and resonance point deviates after capacitance decaying, is also easy to produce resonance, and compensation circuit in this way becomes Low ESR, harmonic wave
The inflow of electric current causes the damage of compensation loop element.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of capacitor low-voltage dynamic reactive power compensation, overcome
The deficiencies in the prior art, so that reducing the reactive power that power supply is conveyed via transmission line of electricity to inductive load.Due to reducing
Flowing of the reactive power in power grid, therefore electric energy caused by can reducing transmission line of electricity and transformer due to conveying reactive power damages
Consumption, thus improve power factor of electric network, reduce line loss, power quality be improved significantly.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs:
A kind of capacitor low-voltage dynamic reactive power compensation, including cabinet body, controller, air switch, arrester, intelligence
Capacitor, fuse and intelligent capacitor, the controller are connected in parallel on the output end of electric system, the air switch
On be connected with arrester, fuse and intelligent capacitor in turn, combination switch, the intelligent capacitor are connected on the controller
Device includes high-quality capacitor, intelligent measure and control module, fling-cut switch module, route protection module and human-computer interface module, described
Intelligent measure and control module be connected on high-quality capacitor and fling-cut switch module, the route protection module with high-quality capacitor
Device, intelligent measure and control module, fling-cut switch module are connected to human-computer interface module, the human-computer interface module with fling-cut switch mould
Block is connected with intelligent measure and control module, and the controller is for analyzing this number inside electric system and compensation branch and intelligent capacitor
It throws, cut and the operational order of various protection early warning, movement etc. it is believed that ceasing and issuing capacitor.
The route protection module is used for power-failure protecting, short-circuit protection, voltage open-phase protection and capacitor overheat protector.
The fling-cut switch module is by thyristor, magnetic latching relay, zero cross fired turning circuit and thyristor protection electricity
Road is constituted, and the thyristor is connected in parallel on magnetic latching relay and thyristor setting is touched in thyristor protection circuit and zero passage
It sends out on turning circuit.
The high-quality capacitor uses self-healing low-voltage compensation capacitor, the capacitor-embedded temperature sensing of high-quality
Device.
The combination switch is switched capacitor switch.
The man-machine interface is for equipment operating parameter and for showing switching state, composite switch module failure shape
State, communication state.
The intelligent measure and control module is completed by zero cross detection circuit, and the intelligent measure and control module is for detecting voltage zero-cross
Point, and so that thyristor is connected major loop in voltage zero-cross, magnetic latching relay is inhaled after certain time-delay in equipotential
It closes.
(3) beneficial effect
The embodiment of the invention provides a kind of capacitor low-voltage dynamic reactive power compensations.Have it is following the utility model has the advantages that
The bulky and bulky tactic pattern of traditional reactive power compensator is changed, has compensation effect more preferable, volume is smaller, power consumption
Lower, price is more honest and cleaner, and save the cost is more, and use is more flexible, and maintenance is more convenient, and the service life is longer, and reliability is higher
Feature has adapted to modern power network to the requirements at the higher level of reactive compensation, can be realized operating passing zero, over-and under-voltage protection, temperature guarantor
Shield, high reliability, wiring is simple, dilatation is convenient and significant effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of heretofore described capacitor low-voltage dynamic reactive power compensation；
Fig. 2 is the circuit diagram of heretofore described capacitor low-voltage dynamic reactive power compensation；
Fig. 3 is the frame shape schematic diagram of heretofore described intelligent capacitor.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Referring to FIG. 1 to 3, the present invention provides a kind of capacitor low-voltage dynamic reactive power compensation, including cabinet body
1, controller 2, air switch 3, arrester 4, intelligent capacitor 5, fuse 6 and combination switch 7, the controller 1 are in parallel even
It connects on the output end of electric system, is connected with arrester, fuse and intelligent capacitor, institute on the air switch 3 in turn
It states and is connected with combination switch 7 on controller 2, the intelligent capacitor 5 includes high-quality capacitor, intelligent measure and control module, switching
Switch module, route protection module and human-computer interface module, the intelligent measure and control module connection is in high-quality capacitor and switching
On switch module, the route protection module with high-quality capacitor, intelligent measure and control module, fling-cut switch module and man-machine boundary
The connection of face mould block, the human-computer interface module are connect with fling-cut switch module and intelligent measure and control module, and the controller is used for
It this data information and issues capacitor inside analysis electric system and compensation branch and intelligent capacitor and throws, cuts and various protections are pre-
The operational order of alert, movement etc..
Preferably, the route protection module is used for power-failure protecting, short-circuit protection, voltage open-phase protection and capacitor excess temperature
Protection, the safety of such effective guarantee low-voltage dynamic reactive power compensation extend equipment life；The fling-cut switch module
It is made of thyristor, magnetic latching relay, zero cross fired turning circuit and thyristor protection circuit, the thyristor is connected in parallel on magnetic
On guard relay and the thyristor is arranged on thyristor protection circuit and zero cross fired turning circuit, may be implemented in this way
Switching open and close action response speed is fast, and can frequent operation；The high-quality capacitor uses self-healing low-voltage compensating electric capacity
Device, the capacitor-embedded temperature sensor of high-quality can make to reflect high-quality capacitor internal the degree of heat in real time in this way,
Realize overheat protector；The man-machine interface is for equipment operating parameter and for showing switching state, composite switch module event
Barrier state, communication state；The intelligent measure and control module is completed by zero cross detection circuit, and the intelligent measure and control module is for detecting
Voltage over zero, and so that thyristor is connected major loop in voltage zero-cross, magnetic latching relay is after certain time-delay, in equipotential
In the case of be attracted；The combination switch is switched capacitor switch, and this fling-cut switch is to have fully absorbed noncontacting switch
The advantage of thyristor and relay respectively, thus long service life is switched, it is low in energy consumption.It is the perfect switch of switched capacitor.
Working principle: controller 2 calculates instantaneous reactive power and the idle function with setting to system voltage current sampling
Rate switching thresholding compares, and control combination switch 7 is turned on and off, and realizes that intelligent capacitor voltage zero-cross investment or current over-zero are cut
It removes, for intelligent capacitor 5 by internal fling-cut switch module, Automatic-searching most preferably puts into (excision) point, realizes no arc switching；Guarantee
Operating passing zero, no-flashy-flow, contact be not sintered, micro- energy consumption, without harmonic wave, while there is anti-interference, anti-lightning strike and power phase shortage, zero load
The defencive function of tripping, switching capacitor when especially suitable for reactive compensation are not required to install radiator additional.
Combination switch 7 puts into capacitor process: the sending trigger signal of comprehensive power distribution controller 2 is compound to open to combination switch 7
After pass control panel is connected to signal, start to detect voltage over zero, and so that thyristor is connected major loop in voltage zero-cross, magnetic is kept
Relay is attracted after certain time-delay in equipotential.Since thyristor is noncontacting switch, and zero potential is put into, just
Often after work, since magnetic latching relay contact resistance is much smaller than thyristor resistor, capacitance current is touched by magnetic latching relay
Head enters power grid.Thus, avoid throw capacitor when shove, arcing, sparking, reduce thyristor working loss.
Combination switch cuts off capacitor process: after the trigger signal of controller output disappears, magnetic latching relay is waiting electricity
It is first disconnected in the case of position, thyristor disconnects after being delayed in current over-zero.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (7)
1. a kind of capacitor low-voltage dynamic reactive power compensation, it is characterised in that: including cabinet body, controller, air switch, keep away
Thunder device, intelligent capacitor, fuse and intelligent capacitor, the controller are connected in parallel on the output end of electric system, institute
It states and is connected with arrester, fuse and intelligent capacitor on air switch in turn, combination switch, institute are connected on the controller
Stating intelligent capacitor includes high-quality capacitor, intelligent measure and control module, fling-cut switch module, route protection module and man-machine interface
Module, intelligent measure and control module connection on high-quality capacitor and fling-cut switch module, the route protection module with
High-quality capacitor, intelligent measure and control module, fling-cut switch module are connected to human-computer interface module, the human-computer interface module with
Fling-cut switch module is connected with intelligent measure and control module, and the controller is for analyzing electric system and compensation branch and intelligent capacitor
Internal this data information simultaneously issues capacitor and throws, cuts and the operational order of various protection early warning, movement etc..
2. capacitor low-voltage dynamic reactive power compensation as described in claim 1, it is characterised in that: the route protection mould
Block is used for power-failure protecting, short-circuit protection, voltage open-phase protection and capacitor overheat protector.
3. capacitor low-voltage dynamic reactive power compensation as described in claim 1, it is characterised in that: the fling-cut switch mould
Block is made of thyristor, magnetic latching relay, zero cross fired turning circuit and thyristor protection circuit, and the thyristor is connected in parallel on
On magnetic latching relay and the thyristor is arranged on thyristor protection circuit and zero cross fired turning circuit.
4. capacitor low-voltage dynamic reactive power compensation as described in claim 1, it is characterised in that: the high-quality capacitor
Device uses self-healing low-voltage compensation capacitor, the capacitor-embedded temperature sensor of high-quality.
5. capacitor low-voltage dynamic reactive power compensation as described in claim 1, it is characterised in that: the combination switch is
Switched capacitor switch.
6. capacitor low-voltage dynamic reactive power compensation as described in claim 1, it is characterised in that: the man-machine interface is used
In equipment operating parameter and for showing switching state, composite switch module malfunction, communication state.
7. capacitor low-voltage dynamic reactive power compensation as described in claim 1, it is characterised in that: the intelligent monitoring mould
Block is completed by zero cross detection circuit, and the intelligent measure and control module makes crystalline substance in voltage zero-cross for detecting voltage over zero
Brake tube connects major loop, and magnetic latching relay is attracted after certain time-delay in equipotential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810596391.6A CN108964074A (en) | 2018-06-11 | 2018-06-11 | A kind of capacitor low-voltage dynamic reactive power compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810596391.6A CN108964074A (en) | 2018-06-11 | 2018-06-11 | A kind of capacitor low-voltage dynamic reactive power compensation |
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| Publication Number | Publication Date |
|---|---|
| CN108964074A true CN108964074A (en) | 2018-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810596391.6A Pending CN108964074A (en) | 2018-06-11 | 2018-06-11 | A kind of capacitor low-voltage dynamic reactive power compensation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0571644B1 (en) * | 1992-05-20 | 1996-03-27 | Siemens Aktiengesellschaft | Method and device for unloading a series capacitor of a controlled series compensator according to the load of its protection shunt |
| CN201821108U (en) * | 2010-09-17 | 2011-05-04 | 安徽西高电气设备有限公司 | Novel dynamic reactive power compensation device |
| CN103023051A (en) * | 2012-12-27 | 2013-04-03 | 广西腾峰科技有限公司 | Intelligent high-precision dynamic reactive compensation control system |
| CN103296683A (en) * | 2013-03-15 | 2013-09-11 | 上海研庆电子有限公司 | Microcomputer controllable silicon intelligent electric power compensation starter |
| CN107069763A (en) * | 2017-04-27 | 2017-08-18 | 国网冀北电力有限公司唐山供电公司 | A kind of low-voltage intelligent capacitor controller and reactive compensation system |
-
2018
- 2018-06-11 CN CN201810596391.6A patent/CN108964074A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0571644B1 (en) * | 1992-05-20 | 1996-03-27 | Siemens Aktiengesellschaft | Method and device for unloading a series capacitor of a controlled series compensator according to the load of its protection shunt |
| CN201821108U (en) * | 2010-09-17 | 2011-05-04 | 安徽西高电气设备有限公司 | Novel dynamic reactive power compensation device |
| CN103023051A (en) * | 2012-12-27 | 2013-04-03 | 广西腾峰科技有限公司 | Intelligent high-precision dynamic reactive compensation control system |
| CN103296683A (en) * | 2013-03-15 | 2013-09-11 | 上海研庆电子有限公司 | Microcomputer controllable silicon intelligent electric power compensation starter |
| CN107069763A (en) * | 2017-04-27 | 2017-08-18 | 国网冀北电力有限公司唐山供电公司 | A kind of low-voltage intelligent capacitor controller and reactive compensation system |
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Application publication date: 20181207 |