CN102545223A - High-voltage dynamic filtering power-saving device for mine - Google Patents
High-voltage dynamic filtering power-saving device for mine Download PDFInfo
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- CN102545223A CN102545223A CN2012100003829A CN201210000382A CN102545223A CN 102545223 A CN102545223 A CN 102545223A CN 2012100003829 A CN2012100003829 A CN 2012100003829A CN 201210000382 A CN201210000382 A CN 201210000382A CN 102545223 A CN102545223 A CN 102545223A
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention provides an IGBT (Insulated Gate Bipolar Transistor)-based high-voltage dynamic filtering power-saving device for a mine, comprising an active filter measuring-controlling and driving circuit, a smoothing filter, a main active filter circuit, a signal detecting circuit, a relay protection signal detecting circuit, a passive filter circuit, an active filter boosting transformer and a grid protecting circuit. A huge controllable reactor which absorbs reactive power and consumes active power in an SVC (Static Var Compensator) is replaced with a capacitor device sending reactive power; and a silicon controlled rectifier for generating harmonics is replaced with a novel electronic switch element, i.e., an IGBT of which the electric property is higher than that of a GTR (Giant Transistor). All the elements are arranged in a flameproof box, so that dynamic reactive compensation harmonic treatment equipment can enter underground, and the aims of reducing line loss and increasing the voltage at a tail end are achieved.
Description
Technical field
The present invention relates to a kind ofly, relate in particular to a kind of mining high pressure dynamic filter battery saving arrangement at the battery saving arrangement that uses with electric unit.
Background technology
The idle filter of high pressure mainly is divided into two kinds at present, and a kind of is that passive filter carries out static reactive power compensation; A kind ofly form SVC [FC+TCR] dynamic reactive filter by active filter and passive filter.
So-called SVC dynamic compensation is made up of many groups single harmonic component tuning capacity, reactor.The summation of condenser capacity [for example 1000kvar capacitor] is when inductive load stops; The electric current that prevents capacitor is delivered to electric power system; Utilize the angle of flow of thyristor; Be transported to false inductive load reactor the inside to the capacitance current of the capacitor group that has little time to withdraw from fast, reach the constant basically purpose of power factor COS φ, wherein the capacity of reactor must equate also to be 1000kvar with the summation capacity of capacitor group.Power factor is to weigh a coefficient of the efficient height of electric equipment; Power factor is low; It is big to explain that circuit is used for the reactive power of alternating magnetic field conversion; Thereby the reduction usage ratio of equipment increase the line powering loss, so power supply department generally has the certain standard requirement to the power factor with electric unit.
Well-known inductance coil is the element of absorbing reactive power, and capacitor is the element that sends reactive power.The reactor coiling just needs coil, and coil itself just has D.C. resistance, and it will consume a large amount of active power, does not also comprise the active power that magnetic loss consumes.The reactive power that it absorbed can cause the electric current in the circuit to increase.Cause when load side is installed, terminal voltage is further reduced.Maximum drawback is that the combination itself of controllable silicon and reactor is exactly a harmonic source, and such consequence is that the harmonic wave control burden of each single tuned filter is further increased the weight of, and makes them can not get forever having a rest, and the life-span further shortens.The thyristor heating that is in operation in addition, itself just consumes active power, must need extra power, and for example water pump and fan are lowered the temperature.
Power factor maintains more than 0.98 all the time after dropping into SVC; The index that suppresses harmonic wave also reaches or has surmounted state quota; It is also better than national standard to seem, is not that power factor is high more good more to electric power system still, particularly the very big network system of capacity of short circuit; Jumbo capacitor group is moved in electrical network, just might produce parallel oscillation with power transformer at any time and cause the collapse of electric power system to disintegrate.
Moreover during electric power electricity charge exercise rate electricity price: COS φ 0.9 does not encourage and does not penalize, and surpasses 1.5 lis of of 0.01 some prize of 0.9 every raising; Up to 0.95,, reach 0.99 even that is to say COS φ by additional calculation; Every degree electricity also only calculates by 0.95, and promptly every degree electricity is rewarded 7.5 lis of at most.If it is promptly anti-idle to cross benefit, then press multiplication and calculate, do not wrap at the end down, impose a fine more.In the electricity charge are calculated, be example with the general industry: meritorious kwh/ hour 0.69 yuan, idle kvarh/ hour 0.2 yuan, the price ratio is 3: 1.See the running time of controlled reactor again; The colliery elevator maximum with reactive power impact is example: actual measurement startup-constant speed-dwell time is 140 seconds; The centre stops 50 seconds, and time ratio is 3: 1, that is to say that controlled reactor is only in 1/3 time service of the frequent start-stop of reactive power impact.Like dwell time >=5 minute, the capacitor group also should be out of service, and controlled reactor quits work thereupon.
For example: basic charge as per installed capacity was 1,000,000 yuan when certain colliery did not resist into SVC, imposed a fine 100,000 yuan, added up to: 1,100,000 yuan, reward 10000 yuan behind the input SVC.Hardly realize drop into the SVC system after, consumption be active power, the price ratio is 3: 1, may surpass 1,100,000 yuan so the meritorious electricity charge that SVC consumes are added in 1,000,000 yuan of the former basic electricity charge, just to the eye by fine.If SVC is installed in national grid electric substation, the operating time of controlled reactor is shorter.Because the load of main transformer is made up of polytype power load; The height of power rate be not directly proportional with the size of load (for example: the power rate of resistive load is for " 1 ", power rate during the electrical equipment heavy load≤0.76, the light hours power rate has only≤0.4); Large Electric equipment is in the light hours; Required load or burden without work can be bigger, preset 0.9～0.99 o'clock as long as set the switching of COS φ controller, the frequent switching situation can not occur.
If use the down-hole to SVC, this is impossible, because huge controlled reactor can't be contained in the Flameproof box at all.If be installed in aboveground away from electric substation, when being arranged, load is load current in the circuit, load is the electric controller electric current when stopping, and improves the purpose that power rate reduces line loss far from.
Summary of the invention
The present invention provides a kind of mining high-voltage dynamic filter battery saving arrangement based on IGBT; Wherein IGBT is the master control device that capacitor sends reactive power in the active filter; Be the compound power device that power field effect pipe and ambipolar high power transistor (GTR) are combined, it is big to have contact capacity, the characteristics that blocking voltage is high; There is break-make speed fast again, the characteristics that driving power is little.Thereby replace absorbing reactive power huge among the SVC and the controlled reactor that consumes active power, be replaced by the capacitor element of sending reactive power; Replace the thyristor of making harmonic wave, be replaced by the electric property novel electron switch element IGBT higher than GTR.
According to an aspect of the present invention; A kind of mining high-voltage dynamic filter battery saving arrangement is provided; Comprising: active filter observing and controlling and drive circuit, flat ripple device, active filter main circuit, signal deteching circuit, relay protection signal testing circuit, passive filter circuit, active filter step-up transformer and gate protection circuit is characterized in that:
Active filter observing and controlling and drive circuit; Comprising the high-pressure reactive compensation harmonic wave measure and control device, pulse-duration modulation signal generator and the driver that are electrically connected each other; High-pressure reactive compensation harmonic wave measure and control device has the input terminal of first number; Be used to receive external signal inputs such as sampled voltage, sample rate current, fuel gas, humidity; And driver has the lead-out terminal of second number, is used under the control of high-pressure reactive compensation harmonic wave measure and control device and pulse-duration modulation signal generator, producing drive signal;
Flat ripple device (L
1, L
2), (A, B C) and between the load (M), are the three-phase integrated formula reactors that every phase coil end of the same name links to each other, with flat wave capacitor device (C to be series at the three-phase high-voltage power supply
1) composition T-shape electric-power filter;
The active filter main circuit comprises six high-voltage great-current IGBT, and its emitter is connected to current-limiting resistance (R respectively
3), have respectively one with active filter observing and controlling and drive circuit in the grid control end (G that is connected of driver output end
1, G
3, G
5, G
2, G
4, G
6), connect (Q between the upper and lower bridge arm of every phase with the three phase full bridge mode
1-Q
2, Q
3-Q
4, Q
5-Q
6) link to each other with the tap of active filter step-up transformer (BL), and have identical protection component with respect to every phase power supply and connect method; Wherein active filter step-up transformer (BL) is a three-phase transformer, and it is series at flat ripple device tap (L
1, L
2) and the IGBT of active filter main circuit between carry out signal transmission and waveform shaping;
Signal deteching circuit, it comprises current sampler (CT
A) be series between the first phase power supply (A) and the load (M), be used to detect load current; Also comprise the voltage sample instrument transformer (PT) that is connected between the second phase power supply (B) and the third phase power supply (C), while detection power factor, harmonic voltage, harmonic current and reactive requirement amount, current sample instrument transformer (CT
A), the output of the secondary coil of voltage sample instrument transformer (PT) links to each other with the input terminal of high-pressure reactive compensation harmonic wave measure and control device;
The relay protection signal testing circuit is comprising three relaying protection current transformer (CT
1, CT
2, CT
3) be series between IGBT and the step-up transformer (BL); Form three-phase capacity current overcurrent protection and open-phase protection; (ia, ib ic) are " star " shape and connect method and link to each other with high-pressure reactive compensation harmonic wave measure and control device relaying protection input terminal with N line while its second siding ring output;
Passive filter circuit is used to absorb harmonic current, comprising three-phase filter reactor (L
3), three Monophase electric power electric capacity (C
2) and three high pressure harmonic elimination resistance (R
1), a wherein end of electric capacity links to each other with three-phase reactor respectively, and the other end inserts the high-tension electricity bus respectively, and high pressure harmonic elimination resistance is parallelly connected with the single phase winding of three-phase reactor respectively;
Gate protection circuit is used for when the driver output HIGH voltage, protecting automatically, comprising gate protection triode (Q
7), voltage stabilizing didoe (ZD
1, ZD
2), transient voltage restraining diode (V
2), gate protection resistance (R
4, R
5) and gate protection capacitor (C
5), transient voltage restraining diode (V wherein
2) the current-limiting resistance (R of negative pole through IGBT
5) link to each other with the grid of IGBT.
Further; Also comprise combustible gas sensor, humidity sensor and detection of electrical leakage ZCT (OCT) in the said relay protection signal testing circuit; The input terminal with high-pressure reactive compensation harmonic wave measure and control device of said combustible gas sensor and said humidity sensor links to each other; Load (M) and the whole equidirectional said detection of electrical leakage ZCTs (OCT) that pass of the electric current line of three-phase high-voltage power supply, the secondary coil output of said detection of electrical leakage ZCT (OCT) links to each other with the input terminal of high-pressure reactive compensation harmonic wave measure and control device.
Further, also comprise surge voltage protection loop, wherein two transient voltage restraining diode (V in the said device
1) an end insert positive pole and negative pole behind the commutating phase wherein respectively.Said transient voltage restraining diode (V
1) the other end respectively with surging protective resistance (R
2), surging absorbs electric capacity (C
4) an end link to each other upper arm transient voltage restraining diode (V
1) an end and first surging protection diode (D
1) positive pole link to each other underarm transient voltage restraining diode (V
1) an end and second surging protection diode (D
2) negative pole link to each other first surging protection diode (D
1) negative pole link to each other second surging protection diode (D with the emitter of upper arm IGBT
2) the collector electrode of positive pole and the underarm IGBT back that links to each other insert A power supply mutually.
Further, the flat wave capacitor device (C in the flat ripple device
1) be the three-phase three-limb power capacitor.
The battery saving arrangement based on IGBT among the present invention, the strong surrounding magnetic field that can avoid producing because of huge controlled reactor operation in traditional battery saving arrangement is given the electromagnetic compatibility trouble caused, avoids causing the floor space of complete equipment to increase.The present invention can be contained in all components and parts in the Flameproof box; Making dynamic passive compensation harmonic wave control equipment get into the down-hole becomes a reality; Reach the reduction line loss, improve the purpose of terminal voltage, really accomplish to improve the purpose of the energy-saving and emission-reduction of the quality of power supply and national requirements.
Description of drawings
Fig. 1 shows the structural representation according to mining high-voltage dynamic filter battery saving arrangement of the present invention;
Embodiment
In traditional SVC dynamic compensation, the power of controllable reactance is 100% of total compensation capacitance amount, and when electrical equipment moved, the capacitance current of passive filter carried out humorous idle the compensating of involving to electrical equipment.When treating that electrical equipment stops, to dummy load (controlled reactor) discharge, consequence is to cause the significant wastage of the energy and material to capacitance current fast.
In device of the present invention, passive filter always is compensated for as needs 50% of whole compensation capacities, and active filter is humorous 50% of the reactive compensation capacity that involves.When complete equipment moves, make active filter become a stable dc constant voltage source.
With reference to Fig. 1; Include source filter observing and controlling and drive circuit in the high pressure dynamic filter battery saving arrangement; Comprising the high-pressure reactive compensation harmonic wave measure and control device, pulse-width signal (PWM) generator and the driver that are electrically connected each other; High-pressure reactive compensation harmonic wave measure and control device has some input terminals; Can receive the input of external signals such as sampled voltage, sample rate current, fuel gas, humidity, N line, and driver has some (as 6) lead-out terminal, be used for generation drive signal under the control of high-pressure reactive compensation harmonic wave measure and control device and pulse-duration modulation signal generator;
Flat ripple device in the device is used to stop high-frequency current to get into load, and prevents to pollute electric power reduction supply line electric current, and it is by smoothing reactor L
1, L
2, and capacitor C
1Form.L wherein
1, L
2Being series between power supply (A, B, C phase) and the load (motor M), is the three-phase integrated formula reactor that every phase coil end of the same name links to each other, with capacitor C
1(three-phase three-limb electric power power capacitor) formed the T-shape electric-power filter.It is in order not influence the terminal voltage of load, power frequency to be Low ESR, high-frequency harmonic is high impedance that flat ripple device end of the same name connects, and two groups the number of turn is different, and the termination that the number of turn is little is gone into harmonic source.For example: harmonic source is from mains side, the L that the number of turn is few
1With capacitor C
1Form high frequency filter.L
2Then the reactance to high order harmonic component increases, and reaches to reduce the purpose of high order harmonic component to load effect.
Active filter main circuit wherein, by six high-voltage great-current IGBT (band parasitic diode), connecting mode is a three phase full bridge.Q between the upper and lower bridge arm of every phase
1, Q
2, Q
3, Q
4, Q
5, Q
6Link to each other with the tap of three-phase voltage increasing transformer BL, transformer BL can use tapped 3-phase autotransformer, changes isolating transformer during supply voltage>=35KV into.This transformer is series between active filter and the electrical network, plays a part signal transmission and waveform shaping, selects suitable tap, can reduce the electric pressure of active filter, thereby reduces the electric stress of power switch component.Insert high voltage, large-capacity power capacitor C between direct current behind the three phase rectifier is positive and negative
3As the capacitive energy-storage travelling wave tube.
In order to prevent that surge voltage, burst current from causing permanent damage to IGBT, also comprise surge voltage protection loop, wherein two transient voltage restraining diode V
1An end insert positive pole and negative pole behind the commutating phase wherein respectively.V
1The other end respectively with resistance R
2, surging absorbs capacitor C
4An end link to each other the V of upper arm
1An end and diode D
1Positive pole link to each other underarm V
1An end and diode D
2Negative pole link to each other.The negative pole of upper arm diode links to each other with the emitter of IGBT.The positive pole of underarm diode inserts A power supply mutually with the continuous back of the collector electrode of underarm IGBT.The emitter of six IGBT is connected to current-limiting resistance R respectively
3
Also comprise gate protection circuit in the main circuit, by triode Q
7,Voltage stabilizing didoe ZD
1, ZD
2, transient voltage restraining diode V
2, resistance R
4, R
5And capacitor C
5Form, wherein the current-limiting resistance R of the negative pole of transient voltage restraining diode and IGBT
5Link to each other with the grid of IGBT.And the Q of A phase, B phase, C phase
1, Q
3, Q
5, Q
2, Q
4, Q
6Protection component to connect method identical.
Is main active filter with IGBT, can regards a voltage source inverter as, with high-frequency PWM signal driving power switching tube, the one-period of main power source is divided into some equal portions, the change pulse duration can change large bulk capacitance C
3The size of capacitance current.This moment, active filter was equivalent to a variable capacitor that capacitance current is adjustable, sent capacitive reactive power to electrical network.
Comprise current sample instrument transformer (CT in the signal deteching circuit
A) be series between the first phase power supply (A) and the load (M), be used to detect load current; Also comprise the voltage sample instrument transformer (PT) that is connected between the second phase power supply (B) and the third phase power supply (C), while detection power factor, harmonic voltage, harmonic current and reactive requirement amount, current sample instrument transformer (CT
A), the output of the secondary coil of voltage sample instrument transformer (PT) links to each other with the input terminal of high-pressure reactive compensation harmonic wave measure and control device.While CT
A, PT holds a concurrent post harmonic wave measurement and control signal source simultaneously.
The relay protection signal testing circuit comprises three current transformer CT that are series between IGBT and the step-up transformer BL
1, CT
2, CT
3Carry out the three-phase capacity current and detect, form overcurrent protection, open-phase protection.Current transformer CT
1And hold a concurrent post and current sample current transformer CTA input current and the output current effect of bit comparison mutually.Current transformer CT
1, CT
2, CT
3Second siding ring output ia, ib, ic, be " star " shape and connect method.Ia, ib, ic, N line link to each other with the relaying protection input of high-pressure reactive compensation harmonic wave measure and control device.The relay protection signal testing circuit comprises that also a combustible gas sensor links to each other with the relaying protection input of high-pressure reactive compensation harmonic wave measure and control device.Comprise that also a humidity sensor links to each other with the relaying protection input of high-pressure reactive compensation harmonic wave measure and control device.Comprise that also a detection of electrical leakage ZCT OCT carries out earth leakage protective.Inductive load (M) is all equidirectional with three electric current lines of compensation complete set of equipments, and (principle is i to pass OCT access electrical network
A+i
B ,+i
C ,+i
0≠ 0).The secondary coil output of OCT links to each other with the relaying protection input of high-pressure reactive compensation harmonic wave measure and control device.
Through above-mentioned processing, the output of high-pressure reactive compensation harmonic wave measure and control device can receive from current sample instrument transformer (CT
A), the output of the secondary coil of voltage sample instrument transformer (PT), current transformer CT
1, CT
2, CT
3The input signal of the outputs such as output and combustible gas sensor, humidity sensor of earth leakage protective detection of electrical leakage ZCT OCT as harmonic wave observing and controlling carried out in the output of second siding ring and N line.
Passive filter circuit is used to absorb harmonic current, comprising three-phase filter reactor (L
3), three Monophase electric power electric capacity (C
2) and three high pressure harmonic elimination resistance (R
1), a wherein end of electric capacity links to each other with three-phase reactor respectively, and the other end inserts the high-tension electricity bus respectively, and high pressure harmonic elimination resistance is parallelly connected with the single phase winding of three-phase reactor respectively.
Passive filter is mainly by capacitor C
2, reactor L
3Form the harmonic filter that suppresses more than 5 times.R
1Effect play a major role when being the high order harmonic component that absorbs more than 11 times.Also play the effect of harmonic elimination; Because high order harmonic component mainly is the odd harmonic more than 5 times under coal mine; So definition filter reactance rate is 5% in this programme, reason is: when
is filter.Whole harmonic currents can get into filter, can make the filter excess load.
When
, for suppressing harmonic wave
When
; The harmonic wave of bus is increased, voltage waveform is seriously distorted.
In the formula: the n-harmonic number
The induction reactance value unit of XL-reactor: Ω
The capacitor value unit of Xc-capacitor: Ω
For example: to main harmonic is for 5 times example:
:
(K=4% reactance Rate,
)
As to design reactance Rate be 4% o'clock, is total impedance=0 of 5 subharmonic, is breakneck.
Also comprise gate protection circuit in the battery saving arrangement, be used for when the driver output HIGH voltage, protecting automatically, comprising gate protection triode (Q
7), voltage stabilizing didoe (ZD
1, ZD
2), transient voltage restraining diode (V
2), gate protection resistance (R
4, R
5) and gate protection capacitor (C
5), transient voltage restraining diode (V wherein
2) the current-limiting resistance (R of negative pole through IGBT
5) link to each other with the grid of IGBT.
The course of work of battery saving arrangement is following: the HJKW-6KV high-pressure reactive compensation harmonic wave measure and control device that uses the production of East China Electric Applicance Co., Ltd is as the high-pressure reactive compensation harmonic wave measure and control device in observing and controlling of this programme active filter and the drive circuit; DC power supply (attaching the power supply of helping) by power is >=50W; Output DC15V, AC/DC simulation stabilized voltage power supply is formed.By pulse-duration modulation signal generator, manual Power Regulation potentiometer W
1Form the automatic power regulation compensating circuit with automatic power regulation circuit ZW.Driver is selected the DA962D6 intelligent object of Luo Muyuan electron production for use, connects six grid control end G of IGBT
1, G
3, G
5, G
2, G
4, G
6
HJKW-6KV high-pressure reactive compensation harmonic wave measure and control device, to the reactive requirement amount of electrical network, and harmonic current, harmonic voltage carries out synchronized sampling with the harmonic current of load, through the pulse-width modulation PWM generator is suitably controlled.Rapid Continuous is constantly sent capacitive reactive power to electrical network, reduces line current, improves terminal voltage.The terminal target voltage that promotes is 97% of system's rated voltage, for reference to terminal voltage.For example: system voltage is 6KV; Terminal voltage before the compensation of down-hole is 5.2KV; Target voltage UL=0.97Un=0.97 * the 6=5.8KV that promotes is the direct voltage that DC10～the 2V scene can be established so this device is set at 4.2KV～6.2KV corresponding conversion, by the UT of controller
1Output links to each other with the Enable Pin of DA962D6 driver, carries out overvoltage and turn-offs the main circuit with startup IGBT.
When normally moving, after the passive filter compensation, the HJKW current signal is gathered current transformer CT at high-voltage motor " M "
AWith the voltage signal acquisition voltage transformer pt, the reactive requirement amount of input, motor terminal voltage carries out analytical calculation, also is lower than set point like the voltage of end, and the PT6KV/100V of HJKW converts output DC10V direct voltage into.It is that inverse proportion changes (4.2KV～6.2KV/DC10V～DC2V) through UT that the first via converts the 10-2V direct voltage into
1Link to each other with the Enable Pin " ENA " of DA962D6, start driver DA962D6 work, ENA is lower than 3V and turn-offs (overvoltage shutoff).The voltage of the second road voltage transformer pt output is pressed direct proportion and is changed, and promptly (4.2KV～6.2KV/DC2V～DC6V); Link to each other with the in-phase input end of the error amplifier of PWM through UT0 output, when the input terminal voltage of feedback PWM comparator is exported high level, turn-off PWM output by overvoltage; (in the normal voltage scope, when error amplifier output high level, output square-wave pulse narrowed width; Otherwise broaden, reach the pulse-width modulation purpose).Simultaneously based on COS φ control method, when the COS φ that HJKW calculates lags behind during COS φ 0.1-0.99, UT
2Do not export, PWM is not controlled, the three-phase PWM signal that PWM produces triggers DA962D6 respectively and carries out IGBT120 ° of sequential turn-on controlled, and control sequence is upper arm Q
1During conducting, underarm Q
4, Q
6Conducting simultaneously, all the other shutoffs.Q
1, Q
4, Q
6Turn-off, through the dead band after the control time, Q
3, Q
2, Q
6Conducting, all the other shutoffs, the rest may be inferred for subsequent process.
This moment energy-storage travelling wave tube, capacitor C
3Capacity current, carry capacitive reactive power to electrical network to greatest extent.Offset the inductance current in the circuit, reach and reduce supply line's electric current, improve the purpose of terminal voltage.During like the inductive load variable power, the detected COS φ of HJKW＞1～-0.95.The corresponding COS φ of HJKW, UT
2The direct voltage of output 0-2V (it is big more to cross the benefit capacity, and the voltage of UT2 output is high more) is through UT
2Output is through W
1, ZW and PWM controller the pwm signal control end link to each other, change the size that pulse duration can change the output energy, reach the purpose of continuous transfer.
In improving the process of terminal voltage, i.e. the height of the pursuit booster tension of face partially also must be considered the height of power factor, and input electric capacity that can not be too much causes COS φ to cross and mends too much.The terminal voltage of electrical network reduces, and mainly is that the reactive current of high-power perceptual electrical equipment is too big, and circuit too far causes again.In this device, differ 180 ° principle according to the direction of the direction of capacitance current and inductance current, drop into the capacitance current with capacity such as inductive current, supply line's electric current (for example: certain elevator starting current: I is descended more than 50%
The A phase=1400A, fundamental active power P=1.3MW, fundamental wave reactive power power Q=11.5Mrar, cos φ=0.11.During constant speed: I
The A phase=500A, P=3.8MW, Q=3.9Mrar, cos φ=0.69.Thereby) can realize only terminal voltage being promoted, reduce the effect that supply line's electric current compensates.Simultaneously, owing to remove the huge consumption active power and the controlled reactor of absorbing reactive power, be replaced by the power capacitor that sends reactive power, the raising that makes quality of voltage advanced-go on foot reaches the purpose of real energy savings.Specifically set based on the scene, only to harmonic wave control compensate, only to idle and COS φ compensate, harmonic wave and reactive-load compensation compensate or the like simultaneously.
The above embodiment has only expressed embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the invention scope.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from design, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (4)
1. mining high-voltage dynamic filter battery saving arrangement; Comprising: active filter observing and controlling and drive circuit, flat ripple device, active filter main circuit, signal deteching circuit, relay protection signal testing circuit, passive filter circuit, active filter step-up transformer and gate protection circuit is characterized in that:
Active filter observing and controlling and drive circuit; Comprising the high-pressure reactive compensation harmonic wave measure and control device, pulse-duration modulation signal generator and the driver that are electrically connected each other; High-pressure reactive compensation harmonic wave measure and control device has the input terminal of first number; Be used to receive external signal inputs such as sampled voltage, sample rate current, fuel gas, humidity; And driver has the lead-out terminal of second number, is used under the control of high-pressure reactive compensation harmonic wave measure and control device and pulse-duration modulation signal generator, producing drive signal;
Flat ripple device (L
1, L
2), (A, B C) and between the load (M), are the three-phase integrated formula reactors that every phase coil end of the same name links to each other, with flat wave capacitor device (C to be series at the three-phase high-voltage power supply
1) composition T-shape electric-power filter;
The active filter main circuit comprises six high-voltage great-current IGBT, and its emitter is connected to current-limiting resistance (R respectively
3), have respectively one with active filter observing and controlling and drive circuit in the grid control end (G that is connected of driver output end
1, G
3, G
5, G
2, G
4, G
6), connect (Q between the upper and lower bridge arm of every phase with the three phase full bridge mode
1-Q
2, Q
3-Q
4, Q
5-Q
6) link to each other with the tap of active filter step-up transformer (BL), and have identical protection component with respect to every phase power supply and connect method; Wherein active filter step-up transformer (BL) is a three-phase transformer, and it is series at flat ripple device tap (L
1, L
2) and the IGBT of active filter main circuit between carry out signal transmission and waveform shaping.
Signal deteching circuit, it comprises current sample instrument transformer (CT
A) be series between the first phase power supply (A) and the load (M), be used to detect load current; Also comprise the voltage sample instrument transformer (PT) that is connected between the second phase power supply (B) and the third phase power supply (C), while detection power factor, harmonic voltage, harmonic current and reactive requirement amount, current sample instrument transformer (CT
A), the output of the secondary coil of voltage sample instrument transformer (PT) links to each other with the input terminal of high-pressure reactive compensation harmonic wave measure and control device;
The relay protection signal testing circuit is comprising three relaying protection current transformer (CT
1, CT
2, CT
3) be series between IGBT and the step-up transformer (BL); Form three-phase capacity current overcurrent protection and open-phase protection; (ia, ib ic) are " star " shape and connect method and link to each other with high-pressure reactive compensation harmonic wave measure and control device relaying protection input terminal with N line while its second siding ring output;
Passive filter circuit is used to absorb harmonic current, comprising three-phase filter reactor (L
3), three Monophase electric power electric capacity (C
2) and three high pressure harmonic elimination resistance (R
1), a wherein end of electric capacity links to each other with three-phase reactor respectively, and the other end inserts the high-tension electricity bus respectively, and high order harmonic elimination resistance is parallelly connected with the single phase winding of three-phase reactor respectively;
Gate protection circuit is used for when the driver output HIGH voltage, protecting automatically, comprising gate protection triode (Q
7), voltage stabilizing didoe (ZD
1, ZD
2), transient voltage restraining diode (V
2), gate protection resistance (R
4, R
5) and gate protection capacitor (C
5), transient voltage restraining diode (V wherein
2) the current-limiting resistance (R of negative pole through IGBT
5) link to each other with the grid of IGBT.
2. battery saving arrangement as claimed in claim 1; Also comprise combustible gas sensor, humidity sensor and detection of electrical leakage ZCT (OCT) in the said relay protection signal testing circuit; The input terminal with high-pressure reactive compensation harmonic wave measure and control device of said combustible gas sensor and said humidity sensor links to each other; Load (M) and the whole equidirectional said detection of electrical leakage ZCTs (OCT) that pass of the electric current line of three-phase high-voltage power supply, the secondary coil output of said detection of electrical leakage ZCT (OCT) links to each other with the input terminal of high-pressure reactive compensation harmonic wave measure and control device.
3. battery saving arrangement as claimed in claim 1 wherein also comprises surge voltage protection loop, wherein two transient voltage restraining diode (V
1) an end insert positive pole and negative pole behind the commutating phase wherein respectively.Said transient voltage restraining diode (V
1) the other end respectively with surging protective resistance (R
2), surging absorbs electric capacity (C
4) an end link to each other upper arm transient voltage restraining diode (V
1) an end and first surging protection diode (D
1) positive pole link to each other underarm transient voltage restraining diode (V
1) an end and second surging protection diode (D
2) negative pole link to each other first surging protection diode (D
1) negative pole link to each other second surging protection diode (D with the emitter of upper arm IGBT
2) the collector electrode of positive pole and the underarm IGBT back that links to each other insert A power supply mutually.
4. battery saving arrangement as claimed in claim 1, the flat wave capacitor device (C in the wherein flat ripple device
1) be the three-phase three-limb power capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100003829A CN102545223A (en) | 2012-01-04 | 2012-01-04 | High-voltage dynamic filtering power-saving device for mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100003829A CN102545223A (en) | 2012-01-04 | 2012-01-04 | High-voltage dynamic filtering power-saving device for mine |
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| Publication Number | Publication Date |
|---|---|
| CN102545223A true CN102545223A (en) | 2012-07-04 |
Family
ID=46351439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100003829A Pending CN102545223A (en) | 2012-01-04 | 2012-01-04 | High-voltage dynamic filtering power-saving device for mine |
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| CN (1) | CN102545223A (en) |
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| CN103715695A (en) * | 2013-12-24 | 2014-04-09 | 国家电网公司 | Intelligent power distribution network neutral point grounding active full-compensation control system |
| CN104184150A (en) * | 2014-08-25 | 2014-12-03 | 山东瑞斯高创股份有限公司 | Passive filter electric energy compensation device |
| CN112236931A (en) * | 2019-05-14 | 2021-01-15 | 东芝三菱电机产业系统株式会社 | Phase-loss detection device for power conversion device |
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| CN112236931B (en) * | 2019-05-14 | 2023-12-22 | 东芝三菱电机产业系统株式会社 | Phase failure detection device for power conversion device |
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Application publication date: 20120704 |