CN103269080A - Intelligent high-voltage automatic capacity adjusting reactive compensation device - Google Patents
Intelligent high-voltage automatic capacity adjusting reactive compensation device Download PDFInfo
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- CN103269080A CN103269080A CN2013102309000A CN201310230900A CN103269080A CN 103269080 A CN103269080 A CN 103269080A CN 2013102309000 A CN2013102309000 A CN 2013102309000A CN 201310230900 A CN201310230900 A CN 201310230900A CN 103269080 A CN103269080 A CN 103269080A
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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
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Abstract
The invention relates to an intelligent high-voltage automatic capacity adjusting reactive compensation device. The intelligent high-voltage automatic capacity adjusting reactive compensation device comprises a comprehensive automatic device, a capacity selective switch controller, a capacity selective switch and a fling-cut switch, wherein the comprehensive automatic device is used for measuring the reactive loads of a main transformer and a capacitor bank, working out the reactive load of the device, analyzing whether the current operation state of the reactive compensation device is reasonable according to the reactive load provided by the capacitor bank, and determining whether the reactive compensation capacity is switched to another capacity, when capacitors need to be switched to another capacity, the comprehensive automatic device is used for transmitting opening signals to the fling-cut switch, when the comprehensive automatic device detects that no electric current exist in the capacitor bank, the comprehensive automatic device is used for transmitting signals to the capacity selective switch controller, the capacity selective switch controller is used for starting the capacity selective switch and adjusting tap positions, and after the tap positions are adjusted, the comprehensive automatic device is used for transmitting switching signals to the fling-cut switch. The intelligent high-voltage automatic capacity adjusting reactive compensation device has the advantages that the grouping number and the grouping capacity of the capacitors are reasonably set according to the number of taps of an on-load tap-switch, and further, the accuracy of reactive compensation is increased.
Description
Technical field
The present invention relates to the reactive power compensation device in a kind of electric power system.
Background technology
Reactive power compensator is the important electric equipment in the electric power system, for the power factor that improves electric power system, reduces system loss, guarantees that the quality of power supply has very important meaning.Particularly dynamic reactive compensation device can increase or the minimizing reactive compensation capacity automatically according to payload and power factor situation, satisfies the reactive requirement of system, thereby guarantees the systematic economy operation.
The principle wiring of traditional reactive power compensator is as shown in Figure 1: when loading greatly, the compensation condenser group drops into, and when load alleviated, excision capacitor group withdrawed from reactive power compensation.
Because China's load variations is bigger, especially the rural area is more outstanding.China's high-pressure reactive compensation device but is traditional whole group capacitor switching, does not have the grouping switching technology.
The shortcoming of this traditional reactive-load compensation method is: the switching capacity of compensation condenser group is bigger, peak hours drops into, and can satisfy the requirement of reactive power compensation substantially, load reduce or during the low ebb load because load or burden without work is less, the capacitor group can't put into operation, and whole group making time is less.The system power factor is low during the excision of compensation condenser group, and electric energy loss is bigger, is unfavorable for energy-saving and emission-reduction.
Summary of the invention
Shortcoming at traditional reactive power compensator existence, the present invention has designed the idle automatic capacity transfer compensation arrangement of intelligent high-pressure, after will putting in order the multiple unit capacitor that group capacitor is divided into different capabilities, this device can be according to the situation of system's load or burden without work, select the suitable compensation capacity, reach neither overcompensation, also undercompensation not farthest improves power factor.
The present invention adopts following technical scheme:
Intelligent high-pressure is idle automatic capacity transfer compensation arrangement comprises comprehensive automatics, Capacity Selection on-off controller, Capacity Selection switch, fling-cut switch,
Described comprehensive automatics, be used for measuring the load or burden without work of main transformer and capacitor group, calculate system's load or burden without work, whether the load or burden without work that provides according to capacitance group is analyzed the current running status of reactive power compensator more reasonable, determine whether reactive compensation capacity switches to another kind of capacity, when the needs capacitor switches to another kind of capacity, send sub-gate signal to fling-cut switch, when comprehensive automatics detects capacitor group no current, send signal to the Capacity Selection on-off controller, the Capacity Selection on-off controller starts the Capacity Selection switch and adjusts gear, has adjusted gear after, comprehensively automatics is sent switching signal to fling-cut switch;
Described Capacity Selection on-off controller starts the Capacity Selection switch operating mechanism by rotating and adjusts to corresponding gear according to the instruction action of comprehensive automatics;
Described Capacity Selection switch is the wheeled switches of many group motor-driven, and every group is set to many grades, and each organizes coaxial configuration, switches to identical gear simultaneously.
Also include the capacitor switch for the protection of electric equipment, described Capacity Selection on-off controller feeds back to comprehensive automatics with the operational taps of Capacity Selection switch operating mechanism, and comprehensive automatics is determined the protection definite value according to gear.
Described Capacity Selection switch is 3 groups, and every group is set to 7 grades.
Described 3 pool-size selector switches are connected with capacitor respectively, the capacity of 3 group capacitors is respectively a, 2a, 4a, by the synthetic 7 kinds of condenser capacities of Capacity Selection switch interior span wiring group, the capacity of every grade of input is respectively: 1 grade of a, 2 grades of 2a, 3 grades of 3a=a+2a, 4 grades of 4a, 5 grades of 5a=a+4a, 6 grades of 6a=2a+4a, 7 grades of 7a=a+2a+4a.
With respect to traditional reactive power compensator, this reactive power compensator has following characteristics:
One, can capacitor packet count, group capacity reasonably be set according to the tap quantity of on load tap changer, thereby can further improve the precision of reactive power compensation.
Two, can adopt less capacitor packet count, realize the reactive compensation capacity than multiscale, wiring is simple relatively.
Three, the system's reactive requirement situation that arrives according to timely monitor is dynamically adjusted reactive compensation capacity under charged situation, thereby improves the power factor (PF) of system fast, improves operation conditions, improves business efficiency.
Four, owing to the restriction of transition resistance to electric current, jump-value of current is little during capacitor switching, and the inrush phenomenon of frequent break-make is also little to the impact of capacitor, can prolong capacitor service life.
Five, same jump-value of current is little during capacitor switching because of the restriction of transition resistance to electric current, causes voltage flicker and wave distortion also little during the electric current variation, makes that the harmonic component in the system is little, is conducive to the safe operation of system.
Description of drawings
Fig. 1 is the key wiring diagram of traditional reactive power compensator.
Fig. 2 is the key wiring diagram of reactive power compensator of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description.
With reference to Fig. 2, intelligent high-pressure is idle automatic capacity transfer compensation arrangement comprises comprehensive automatics, Capacity Selection on-off controller, Capacity Selection switch, fling-cut switch,
Described comprehensive automatics, be used for measuring the load or burden without work of main transformer and capacitor group, calculate system's load or burden without work, whether the load or burden without work that provides according to capacitance group is analyzed the current running status of reactive power compensator more reasonable, determine whether reactive compensation capacity switches to another kind of capacity, when the needs capacitor switches to another kind of capacity, K4 sends sub-gate signal to fling-cut switch, when comprehensive automatics detects capacitor group no current, send signal to the Capacity Selection on-off controller, the Capacity Selection on-off controller starts the Capacity Selection switch and adjusts gear, has adjusted gear after, comprehensively automatics is sent switching signal to fling-cut switch;
Described Capacity Selection on-off controller starts the Capacity Selection switch operating mechanism by rotating and adjusts to corresponding gear according to the instruction action of comprehensive automatics;
Described Capacity Selection switch is the wheeled switches of many group motor-driven, and every group is set to many grades, and each organizes coaxial configuration, switches to identical gear simultaneously.It is 3 groups that present embodiment adopts the Capacity Selection switch, and every group is set to 7 grades.Certainly, can also realize the more level and smooth capacity transfer of multiscale by change capacitor packet count, group capacity, compound mode, contact quantity, safe distance can between contact as long as increase Capacity Selection switch diameter keeps.The moving contact of the wheeled switch of motor-driven is provided with the current limliting transition resistance, and available transformer oil can be selected the current-limiting resistance of different resistances according to the condenser capacity difference for use as insulation and arc-extinguishing medium.
The signalizing activity that is sent by the Capacity Selection on-off controller under currentless situation is selected the 1-N shelves, and this switch can positive and negative tune switch, just changeing when feeding the positive sequence three-phase electricity, reverse when feeding negative-phase sequence, cooperate fling-cut switch, the capacitor group can be selected the different capabilities operation.
Also include the capacitor switch K3 for the protection of electric equipment on the compensation arrangement, described Capacity Selection on-off controller feeds back to comprehensive automatics with the operational taps of Capacity Selection switch operating mechanism, and comprehensive automatics is determined the protection definite value according to gear.When electric equipment broke down, comprehensive automatics can be sent the protection actuating signal and give capacitor switch K3, made the K3 tripping operation, reliably excised fault.Because the capacitor of operation constantly changes capacity, therefore protect definite value also changing, according to the capacitor different capabilities different protection of the number cover definite values (present embodiment adjust 7 cover definite values) of adjusting, select different protection definite values by Capacity Selection switch gear.
Each pool-size selector switch all is connected with a group capacitor, form 3 group capacitors, be denoted as the I group capacitor, the II group capacitor, the III group capacitor, setting I group capacitor capacity is a, II group capacitor capacity is 2a, II group capacitor capacity is 4a, its concrete big I adjustment precision as required, each factor of capacity and cost considers that by the synthetic 7 kinds of condenser capacities of Capacity Selection switch interior span wiring group, the capacity of every grade of input is respectively: 1 grade of a, 2 grades of 2a, 3 grades of 3a=a+2a, 4 grades of 4a, 5 grades of 5a=a+4a, 6 grades of 6a=2a+4a, 7 grades of 7a=a+2a+4a.
Because 3 group selection switches switch to identical gear simultaneously, so when selecting switch all to be transferred to 1 grade, the capacity that the I group capacitor drops into is a, and the capacity that II group capacitor and III group capacitor drop into all is 0, and the capacity of the total input of capacitor group is a like this;
When selecting switch all to be transferred to 2 grades, the capacity that I group capacitor and III group capacitor drop into all is that the capacity that 0, the II group capacitor drops into is 2a, and the capacity of the total input of capacitor group is 2a like this;
When selecting switch all to be transferred to 3 grades, the capacity that the I group capacitor drops into all be a, and the capacity that the II group capacitor drops into is 2a, the capacity of III group capacitor input all 0, and the capacity of the total input of capacitor group is 3a like this;
When selecting switch all to be transferred to 4 grades, the capacity that I group capacitor and II group capacitor drop into all is that the capacity that 0, the III group capacitor drops into is 4a, and the capacity of the total input of capacitor group is 4a like this;
When selecting switch all to be transferred to 5 grades, the capacity that the I group capacitor drops into is a, and the capacity that the II group capacitor drops into is that the capacity that 0, the III group capacitor drops into is 4a, and the capacity of the total input of capacitor group is 5a like this;
When selecting switch all to be transferred to 6 grades, the capacity that the I group capacitor drops into is that the capacity that 0, the II group capacitor drops into all be 2a, and the capacity of III group capacitor input all is 4a, and the capacity of the total input of capacitor group is 6a like this;
When selecting switch all to be transferred to 7 grades, the capacity that the I group capacitor drops into is a, and the capacity that the II group capacitor drops into all be 2a, and the capacity of III group capacitor input all is 4a, and the capacity of the total input of capacitor group is 7a like this.
Our supposition is that the capacitor of 2.1Mvar is divided into 3 groups with total capacity, every pool-size is respectively 0.3Mvar, 0.6Mvar, 1.2Mvar, the Capacity Selection switch is divided into 9 layers, be 7 gears, can be combined into 7 kinds of capacity by jumper in the selector switch, the capacity of every grade of input is respectively: 1 grade of 0.3Mvar, 2 grades of 0.6Mvar, 3 grades of 0.9Mvar(0.3Mvar+0.6Mvar), 4 grades of 1.2Mvar, 5 grades of 1.5Mvar(0.3Mvar+1.2Mvar), 6 grades of 1.8Mvar(0.6Mvar+1.2Mvar), 7 grades of 2.1Mvar(0.3Mvar+0.6Mvar+1.2Mvar), can satisfy the needs that transformer station's load or burden without work changes basically.
If the capacitor gross rated capacity of an idle automatic capacity transfer compensation arrangement outfit of high pressure is 2.1Mvar.When system's busy hour, meritorious 6MW, the idle 2.5Mvar of system, natural power factor is
After device transferred to 7 grades of full group capacitor 2.1Mvar of input, power factor was brought up to
After system loading reduces by 2/5, the 3.6MW that gains merit this moment, the idle 1.5Mvar of system, natural power factor is
As when using the traditional capacitor compensation arrangement, then whole group capacitor should excise.As use the idle automatic capacity transfer compensation arrangement of high pressure, and this device can transfer to 5 grades of input capacitor 1.5Mvar according to the load or burden without work situation, and power factor brings up to 1, overcompensation do not occur.
If certain Reactive Compensation Capacitor in Substation is connected on the 10kV bus, total capacity is 2.1Mvar, and it is 4 Ω to the every equivalent resistance of 10kV that main transformer reaches with top (containing transforming plant lead-in) conversion, and the low ebb duration of load application is 10 hours every days, the low ebb 3MW that gains merit, the idle 1.25Mvar of system.This moment, traditional whole group capacitor can not put into operation, and natural apparent power is
Power factor
Electric current
Behind the idle automatic capacity transfer compensation arrangement of installing high pressure, after this device transfers to 4 grades of input compensation 1.2Mvar, meritorious 3MW, idle 0.05Mvar, apparent power is
Power factor
Electric current
The active power loss that reduces after the compensation when this transformer station's low ebb is loaded is 4 * 187.64
2* 3-4 * 173.23
2* 3=62401.64W, annual energy efficient 62401.64 ÷ 1000 * 10 * 365=227766 kilowatt hour (22.7766 ten thousand kilowatt hour).
Claims (4)
1. the idle automatic capacity transfer compensation arrangement of intelligent high-pressure is characterized in that, comprises comprehensive automatics, Capacity Selection on-off controller, Capacity Selection switch, fling-cut switch,
Described comprehensive automatics, be used for measuring the load or burden without work of main transformer and capacitor group, calculate system's load or burden without work, whether the load or burden without work that provides according to capacitance group is analyzed the current running status of reactive power compensator more reasonable, determine whether reactive compensation capacity switches to another kind of capacity, when the needs capacitor switches to another kind of capacity, (K4) sends sub-gate signal to fling-cut switch, when comprehensive automatics detects capacitor group no current, send signal to the Capacity Selection on-off controller, the Capacity Selection on-off controller starts the Capacity Selection switch and adjusts gear, has adjusted gear after, comprehensively automatics is sent switching signal to fling-cut switch;
Described Capacity Selection on-off controller starts the Capacity Selection switch operating mechanism by rotating and adjusts to corresponding gear according to the instruction action of comprehensive automatics;
Described Capacity Selection switch is the wheeled switches of many group motor-driven, and every group is set to many grades, and each organizes coaxial configuration, switches to identical gear simultaneously.
2. the idle automatic capacity transfer compensation arrangement of intelligent high-pressure according to claim 1; it is characterized in that; also include the capacitor switch (K3) for the protection of electric equipment; described Capacity Selection on-off controller feeds back to comprehensive automatics with the operational taps of Capacity Selection switch operating mechanism, and comprehensive automatics is determined the protection definite value according to gear.
3. the idle automatic capacity transfer compensation arrangement of intelligent high-pressure according to claim 1 is characterized in that described Capacity Selection switch is 3 groups, and every group is set to 7 grades.
4. the idle automatic capacity transfer compensation arrangement of intelligent high-pressure according to claim 3, it is characterized in that described 3 pool-size selector switches are connected with capacitor respectively, the capacity of 3 group capacitors is respectively a, 2a, 4a, by the synthetic 7 kinds of condenser capacities of Capacity Selection switch interior span wiring group, the capacity of every grade of input is respectively: 1 grade of a, 2 grades of 2a, 3 grades of 3a=a+2a, 4 grades of 4a, 5 grades of 5a=a+4a, 6 grades of 6a=2a+4a, 7 grades of 7a=a+2a+4a.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1953891A1 (en) * | 2005-09-26 | 2008-08-06 | Ruitian Su | A customer intelligent reactive power automatic compensation energy-saved device |
| CN101504883A (en) * | 2009-03-25 | 2009-08-12 | 如皋市东惠电子有限公司 | Adjustable AC capacitor |
| CN101604846A (en) * | 2009-04-30 | 2009-12-16 | 沈阳华岩电力技术有限公司 | Intelligent high-pressure reactive compensation device and method thereof |
| CN203326611U (en) * | 2013-06-09 | 2013-12-04 | 临安亿安电力电子科技有限公司 | Intelligent high-voltage reactive automatic capacity adjusting compensation device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1953891A1 (en) * | 2005-09-26 | 2008-08-06 | Ruitian Su | A customer intelligent reactive power automatic compensation energy-saved device |
| CN101504883A (en) * | 2009-03-25 | 2009-08-12 | 如皋市东惠电子有限公司 | Adjustable AC capacitor |
| CN101604846A (en) * | 2009-04-30 | 2009-12-16 | 沈阳华岩电力技术有限公司 | Intelligent high-pressure reactive compensation device and method thereof |
| CN203326611U (en) * | 2013-06-09 | 2013-12-04 | 临安亿安电力电子科技有限公司 | Intelligent high-voltage reactive automatic capacity adjusting compensation device |
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