CN203491701U - Harmonic-resistant intelligent integrated power capacitor - Google Patents
Harmonic-resistant intelligent integrated power capacitor Download PDFInfo
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- CN203491701U CN203491701U CN201320530889.5U CN201320530889U CN203491701U CN 203491701 U CN203491701 U CN 203491701U CN 201320530889 U CN201320530889 U CN 201320530889U CN 203491701 U CN203491701 U CN 203491701U
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- control unit
- capacitor
- switching control
- reactor
- air switch
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- 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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Abstract
The utility model relates to a harmonic-resistant capacitor, and specifically relates to a harmonic-resistant intelligent integrated power capacitor. The power capacitor comprises an intelligent measurement and control unit, a switching control unit, a capacitor, a reactor and an air switch. The capacitor is connected with the reactor. An output terminal of the switching control unit is connected with the reactor, and an input terminal of the switching control unit is connected with the air switch. The intelligent measurement and control unit is connected with the air switch. By adopting the above structure, with the zero-cross switching function of the switching control unit, the phenomena of surge impulse, operation over-voltage and arc reignition are ensured to be prevented during the capacitor switching process, thereby greatly reducing the failure rate of compensation equipment and user complaint rate, and prolonging the service life of the equipment. Besides, the overall structure of the capacitor is modularized, so that the wiring is simple, and the mounting, dismounting and maintenance are facilitated.
Description
Technical field
The utility model relates to a kind of anti-harmonic wave electric capacity, especially a kind of anti-harmonic wave Intelligent integration power condenser.
Background technology
Electric load in electrical network is as motor, transformer etc., and major part belongs to inductive load, and in running, needing provides corresponding reactive power to these equipment.After the reactive-load compensation equipments such as shunt capacitor being installed in electrical network, the reactive power that can provide inductive reactance to consume, reduced the reactive power that electric network source provides, carried by circuit to inductive load, owing to having reduced reactive power flowing in electrical network, therefore can reduce the electric energy loss because carrying reactive power to cause of circuit and transformer, carry out reactive power compensation.Reactive power compensation can improve power factor, is a wastage reducing and energy saving measure requiring less investment while yielding quicker results.
Reactive Compensation Mode conventional in electrical network comprises: 1. at substation busbars, install Shunt Capacitor Unit concentratedly; 2. in high and low voltage electric distribution circuit, disperse to install Shunt Capacitor Unit; 3. in distribution transformer low-pressure side and user workshop switchboard, parallel capacitor is installed; 4. shunt capacitor etc. is installed at single motor place.
The motor of a lot of large-scale operating mode enterprises adopts 0.66KV at present, can reduce the input current of equipment like this, reduce line loss, owing to controlling this motor, mostly adopt frequency converter to control, in equipment running process, can produce higher more than 5 times harmonic wave like this, this harmonic wave can make the electric current in capacitor amplify, and causes the voltage harmonic content in electrical network to improve simultaneously, can have influence on the normal operation of other electric equipments.Conventionally the method addressing this problem is to install series reactor additional at parallel capacitor front end, carry out the amplification of electric current in suppression capacitor, by reactive factor controller, control again the switching quantity in parallel of power capacitor, thereby realizing the compensation of reactive power, is that power factor reaches 0.95 left and right.Specifically by idle compensating control, switch with knifeshaped fuse, the actuator of reactive power compensator, thermal relay, series reactor, several parts such as power capacitor form.Exist wiring complicated, take up room large, the shortcoming such as cost is high, site examining and repairing inconvenience.
Summary of the invention
The purpose of this utility model is, a kind of easy for installation, wiring is simple, volume is little anti-harmonic wave Intelligent integration power condenser is provided.
The utility model solves the technical scheme that its technical problem adopts: a kind of anti-harmonic wave Intelligent integration power condenser, comprise intelligent measurement and control unit, switching control unit, capacitor, reactor, air switch, capacitor is connected with reactor, the output of switching control unit is connected with reactor, the input of switching control unit is connected with air switch, and intelligent measurement and control unit is connected with air switch.
Of the present utility modelly further be set to: described intelligent measurement and control unit adopts acquisition chip CS5460A.
Of the present utility modelly further be set to: in switching control unit, be provided with magnetic latching relay, detect the voltage over zero detecting unit of civil power zero cross signal, gather the current transformer of current zero-crossing signal, voltage over zero detecting unit, current transformer are connected with magnetic latching relay respectively.
Said structure utilizes the operating passing zero function of switching control unit, guarantee in capacitor switching process no-flashy-flow impact, without switching overvoltage, without arc reignition, greatly reduce the rate of complaints of compensation equipment failure rate and user, extended the useful life of equipment, and in overall structure, form modularization, wiring is just simple, installs, dismantles, keeps in repair all very convenient.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the loop schematic diagram of the present embodiment;
Fig. 2 is the structural representation of the present embodiment switching control unit;
Embodiment
With reference to figure 1, Fig. 2 is known, a kind of anti-harmonic wave Intelligent integration power condenser of the utility model, comprise intelligent measurement and control unit SS, switching control unit J, capacitor C, reactor L, air switch KK, capacitor C is connected with reactor L, the output of switching control unit J is connected with reactor L, the input of switching control unit J is connected with air switch KK, intelligent measurement and control unit SS is connected with air switch KK, described intelligent measurement and control unit SS adopts acquisition chip CS5460A, in switching control unit J, be provided with magnetic latching relay, detect the voltage over zero detecting unit of civil power zero cross signal, gather the current transformer of current zero-crossing signal, voltage over zero detecting unit, current transformer is connected with magnetic latching relay respectively.
In this enforcement, can only by gathering BC phase voltage and A phase current, this signal be delivered in the special-purpose acquisition chip CS5460A of parameters of electric power by measurement and control unit, carry out rated output factor.This power factor and input thresholding and the comparison of excision thresholding, in whole switching delay time, if in switching thresholding, will not move; If be less than input thresholding, drop into one group of electric capacity; If be greater than excision thresholding or power factor occur while being negative, excise one group of electric capacity having dropped into.Pass through again switching delay time, repeat comparison and switching, until current power factor reaches in switching thresholding.If find in switching process, the voltage detecting is greater than the overvoltage protection thresholding of setting, excises all capacitors that dropped into, to play the effect of protection electric capacity.If find when switching, the electric current detecting is less than undercurrent and blocks thresholding, stops switching action, avoids occurring the phenomenon of switching cycle.
The line voltage and the phase current that gather on circuit calculate the voltage of circuit, electric current, active power, reactive power and power factor.The effective value of voltage and current carries out hardware calculating by CS5460.In the situation that the voltage and current of circuit is all three-phase symmetrical, the reactive power of system is
Q＝3U
aI
asinφ
Wherein φ is power-factor angle.Again because
ratio
leading 900, amplitude differs
doubly, so can obtain
From above formula, as long as gather Ucb and Ia, and they are sent in CS5460, according to the method for active power, calculate, then be multiplied by
just obtain the reactive power of actual track.
Had reactive power, the active power that just can obtain system is
Power factor is
Cosφ=P/S=P/UI
The positive and negative of φ angle judge by the positive and negative of reactive power, when Q>0, and φ >0, load is perception; When Q<0, φ <0, load is capacitive.
Overvoltage zero crossing detecting unit, the zero cross signal of detection civil power, located to guarantee that to the coil trigger voltage of relay node is closed at voltage over zero place in 1/4 cycle of civil power.
During excision: gather the zero cross signal of electric current by current transformer, locate to add trigger voltage to coil in 1/4 cycle of the waveform of electric current, guarantee that node disconnects at current zero-crossing point place.
Obviously, above-described embodiment is only used to done giving an example is clearly described, and the not restriction to execution mode.To those of ordinary skill in the art, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all execution modes.And the apparent variation of being extended out thus or change are still in protection range of the present utility model.
Claims (3)
1. an anti-harmonic wave Intelligent integration power condenser, it is characterized in that: comprise intelligent measurement and control unit, switching control unit, capacitor, reactor, air switch, capacitor is connected with reactor, the output of switching control unit is connected with reactor, the input of switching control unit is connected with air switch, and intelligent measurement and control unit is connected with air switch.
2. according to anti-harmonic wave Intelligent integration power condenser claimed in claim 1, it is characterized in that: described intelligent measurement and control unit adopts acquisition chip CS5460A.
3. according to the anti-harmonic wave Intelligent integration power condenser described in claim 1 or 2, it is characterized in that: in switching control unit, be provided with magnetic latching relay, the voltage over zero detecting unit of detection civil power zero cross signal, the current transformer of collection current zero-crossing signal, voltage over zero detecting unit, current transformer are connected with magnetic latching relay respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320530889.5U CN203491701U (en) | 2013-08-28 | 2013-08-28 | Harmonic-resistant intelligent integrated power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320530889.5U CN203491701U (en) | 2013-08-28 | 2013-08-28 | Harmonic-resistant intelligent integrated power capacitor |
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| Publication Number | Publication Date |
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| CN203491701U true CN203491701U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320530889.5U Expired - Fee Related CN203491701U (en) | 2013-08-28 | 2013-08-28 | Harmonic-resistant intelligent integrated power capacitor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656059A (en) * | 2016-03-28 | 2016-06-08 | 国网山东省电力公司章丘市供电公司 | High-load-variation-rate low-voltage distribution network reactive power compensation cabinet |
| CN106849125A (en) * | 2017-03-21 | 2017-06-13 | 佛山市施诺尔电气有限公司 | A kind of intelligent capacitor compensation device and capacitor switching method |
| CN109660178A (en) * | 2019-01-26 | 2019-04-19 | 哈尔滨兴亚技术有限公司 | A kind of efficient kinetic control system and its control method of motor stator frequency operating condition |
-
2013
- 2013-08-28 CN CN201320530889.5U patent/CN203491701U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656059A (en) * | 2016-03-28 | 2016-06-08 | 国网山东省电力公司章丘市供电公司 | High-load-variation-rate low-voltage distribution network reactive power compensation cabinet |
| CN106849125A (en) * | 2017-03-21 | 2017-06-13 | 佛山市施诺尔电气有限公司 | A kind of intelligent capacitor compensation device and capacitor switching method |
| CN106849125B (en) * | 2017-03-21 | 2024-05-14 | 广东汇之华电气有限公司 | Intelligent capacitance compensation device and capacitance switching method |
| CN109660178A (en) * | 2019-01-26 | 2019-04-19 | 哈尔滨兴亚技术有限公司 | A kind of efficient kinetic control system and its control method of motor stator frequency operating condition |
| CN109660178B (en) * | 2019-01-26 | 2020-08-18 | 哈尔滨兴亚技术有限公司 | Efficient motion control system and method for motor under constant-frequency working condition |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20170828 |
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| CF01 | Termination of patent right due to non-payment of annual fee |