CN1254870A - Method and equipment for overall increasement of electricity quality - Google Patents
Method and equipment for overall increasement of electricity quality Download PDFInfo
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- CN1254870A CN1254870A CN 99117667 CN99117667A CN1254870A CN 1254870 A CN1254870 A CN 1254870A CN 99117667 CN99117667 CN 99117667 CN 99117667 A CN99117667 A CN 99117667A CN 1254870 A CN1254870 A CN 1254870A
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- voltage
- civil power
- frequency converter
- switch
- load
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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
A method and equipment for the overall improvement of electricity quality is disclosed. The converter able to generate capacitance current, stepping-up voltage and rectification function, the frequency converter, measuring and control circuit and function switching switch are its main units. A stable DC voltage is obtained by taking energy from main electric network and after frequency conversion, a rated AC voltage is supplied to load eliminate the damage caused by instantaneous voltage drop and stabilize load voltage. When main electric network works normally, a capacitance current is generated. Its advantages are no any energy storage element, multiple functions (eliminating instantaneous voltage drop, stabilizing voltage and reactive power compensation), and low cost.
Description
The present invention relates to be used for conversion equipment and their control or the regulating device of power supply or similarly electric system, relate in particular to a kind of comprehensive raising electricity consumption method for quality and device thereof.
Uninterrupted power source at present commonly used is eliminated the civil power transient voltage and is fallen the harm that is caused, and comes burning voltage with electromagnetic stabilizer, improves power factor with AC capacitor.But these equipment the time exist following point in operation: compole is short during the real work of uninterrupted power source, the overwhelming majority time all is in stand-by state, and accumulator price height, life-span weak point, the incompatibility large power long time is adjusted the needs of voltage, and the electromagnetic stabilizer response time is oversize, can't carry out the pressure regulation of transient voltage when falling, AC capacitor volume again is too big.
The objective of the invention is to overcome the deficiencies in the prior art and propose a kind of comprehensive raising electricity consumption method for quality.
Another purpose of the present invention is to propose a kind of device of realizing comprehensively improving the electricity consumption quality method.
Purpose of the present invention is achieved by the following technical programs.
This comprehensive raising electricity consumption method for quality, to have the generation capacity current, boost and the transducer of rectification function, frequency converter, telemetry circuit and function change-over switch are critical piece, the function change-over switch is controlled by the telemetry circuit that real-time online detects line voltage, its pro-jobs is in proper order for eliminating the harm that the civil power transient voltage falls, AC voltage-stabilizing and reactive power compensation, produce that transient voltage falls and during the civil power low-voltage at civil power, adopt width modulation skill water, automatically the electronic power switch device of control change device makes the last voltage of civil power directly be added on the telefault, and then reduce electric current in the inductance suddenly, make the inductance two ends produce voltage, and make the last utmost point low-voltage addition of itself and civil power from civil power, pull energy to charge to filter capacitor, obtaining galvanic current on filter capacitor presses, be that inversion operating switch circuit becomes this direct current with the synchronous specified alternating voltage of civil power and offers load by frequency converter again, when line voltage is higher, alternating current in the load is also from frequency converter, and the required direct current of frequency converter is obtained after the rectifier system routinely by civil power, at civil power just often, the required alternating current of load through the function change-over switch directly from civil power, and make this system produce the capacitive alternating current, and then improve the power factor of feed leg.
This comprehensive raising device of electricity quality, comprise transducer, bipolar unit switch and frequency converter, the transducer input end is connected to civil power, output terminal is connected with frequency converter by bipolar unit switch, it is characterized in that being provided with a real-time online and detect the telemetry circuit of line voltage and the function change-over switch that is subjected to its control, load is connected with civil power, frequency converter respectively by the function change-over switch.Produce that transient voltage falls and line voltage when unusual at civil power, telemetry circuit control function change-over switch, the alternating current of load is supplied with by frequency converter, and the direct supply of frequency converter is from transducer, transducer is according to the height and the load size of civil power residual voltage, by adjustment to electronic power switch break-over of device width, under the acting in conjunction of inductance and big electric capacity, from the civil power that residual voltage is only arranged, pull energy, obtain galvanic current and press, and need not any energy-storage travelling wave tube, at civil power just often, telemetry circuit control function change-over switch, the alternating current that makes load is directly from civil power, and transducer is used for producing reactive power.
Apparatus of the present invention can adopt mimic channel, also can adopt digital circuit to form.
The inventive method is novel, and is reasonable in design.Contrive equipment does not have any energy-storage travelling wave tube, and collection is paid no attention to the harm that the elimination transient voltage in outage source falls, and the voltage stabilizing of electromagnetic voltage adjusting device and three kinds of functions such as reactive power compensation of AC capacitor are one, has that function is many, volume is little, cost is low and advantage such as easy care.The present invention can be widely used in chemical fibre, electronics, iron and steel, traffic and papermaking etc. and require the quantity-produced industry, is particularly useful for technical fields such as modern governing system, gas-discharge lighting system and computer procedures control.
The present invention has the following drawings:
Fig. 1 is the synoptic diagram of the inventive method;
Fig. 2 is the composition sketch of transducer 1;
Fig. 3 is the composition block scheme of controller 4;
Fig. 4 is the enforcement circuit diagram of the controller 4 of transducer 1;
Fig. 5 is the composition block scheme of frequency converter 2;
Fig. 6 is the embodiment circuit diagram of frequency converter 2;
Fig. 7 is the composition block scheme of telemetry circuit 3;
Fig. 8 is the embodiment circuit diagram of telemetry circuit 3.
Below in conjunction with embodiment and contrast accompanying drawing method of the present invention and device are made an explanation.
Embodiment device comprises transducer 1, bipolar unit K switch 1 (HS260ZK), frequency converter 2. transducers 1 input termination civil power, output terminal is connected with frequency converter 2 by bipolar unit K switch 1, be provided with a real-time online and detect the telemetry circuit 3 of line voltage and the function change-over switch K0 (HS260ZK) that is subjected to its control, load Z (1 kilowatt) is connected with civil power, frequency converter 2 respectively by function change-over switch K0.At civil power just often, telemetry circuit 3 detect civil power normal after, send signal and give function change-over switch K0, achieve K
0--1---K
0--2And K
0--1 '---K
0---2 'Between connect, send signal simultaneously and it be in for bipolar unit K switch 1 to disconnect the position.The alternating current of giving load Z is directly from civil power "～", and current supply circuit is: civil power (～) → K
0--2→ K
0--1→ Z → K
0--1 '→ K
0---2 '→ civil power (～); Telemetry circuit 3 control change devices 1 produce the capacity current of leading line voltage 90 degree of phase place simultaneously, to improve the power factor of feed leg.Occur when unusual at civil power, telemetry circuit 3 detects city's electrical anomaly such as overtension, crosses low or produces transient voltage and falls, and gives function change-over switch K0 just send control signal, makes its K
0--1---K
0---3And K
0---1 '---K
0---3 'Between connect, send signal simultaneously and give bipolar unit K switch 1, it is in connects the position.The alternating current of giving load Z is from frequency converter 2, and current supply circuit is: civil power (～) → transducer 1 → K
1--0→ K
1-1→ frequency converter (2) → K
0--3→ K
0--1→ Z → K
0---1 '→ K
0---3 '→ frequency converter 2 → K
1---1 '→ K
1---0 '→ transducer 1 → civil power (～).
When line voltage was higher, transducer 1 was identical with general rectifier.And when line voltage is on the low side, after receiving the signal of telemetry circuit 3, controller 4 carries pulse-width signal for electronic power switch device VT1--VT4 (BSM50GB120DN2), under the acting in conjunction of diode VD1--VD4, with A, 2 instantaneous short circuit of B, from the remaining voltage of civil power, pull energy, turn-off electronic power switch device VT1--VT4 in adjacent moment, electric current in the inductance L (2 milihenry) is sharply diminished, produce electromotive force at its two ends, this electromotive force adds to big capacitor C (5000 microfarad) charging mutually with the civil power residual voltage, provides DC voltage stably to frequency converter 2.At line voltage just often, as previously mentioned, the required alternating current of load Z is directly from civil power, and this moment, transducer 1 produced capacity current.
When line voltage is on the low side, the K of telemetry circuit 3 control one pole open and shut valve K2 (HEF4011)
2--0---K
2--1Connect.DC voltage master makes 401 (200 volts) and feedback voltage Ed produce stable alternating current maximal value master order through voltage regulator 402 (LM324), it with from the sinusoidal signal of phase locking unit 403 (LM324) through multiplier 404 (5G33) produced long-pending, promptly be and the synchronous alternating current master order of line voltage, this alternating current master order obtains the process variable that desired alternating voltage master makes with feedback communication electric current I a behind current regulator 405 (LM324), this process variable and line voltage obtain desired alternating voltage master order after totalizer 406 (LM324) addition, this alternating voltage master order becomes 0 of respective width with triangular-wave generator 412 (LM324) acting in conjunction behind modulator 407 (LM339), 1 signal is after driver 408 (M57962L) becomes the break-make that corresponding pulse removes to control electronic power switch device VT1--VT4.Under the acting in conjunction of inductance L and big capacitor C,, also can there be galvanic current to press even have only at line voltage under the extreme condition of 20% ratings.
When producing reactive power, the K of telemetry circuit 3 control one pole open and shut valve K2
2--0---K
2--0Connect, reactive-load compensation current maxima instruction 409 (6 peace) obtains the alternating current master order that the leading line voltage 90 of phase place is spent with the sinusoidal signal that phase shifter 410 (LM324) comes behind multiplier 411 (5G33), this alternating current master order obtains the process variable that desired alternating voltage master makes with feedback current Ia after current regulator 405 is regulated, this process variable and line voltage obtain desired alternating voltage master order after totalizer 406 additions, it and the break-make of after modulator 407 modulation and driver 408 amplification, controlling the electronic power switch device from the triangular wave of generator 412, under the acting in conjunction of inductance L and big capacitor C, from civil power, draw the capacitive reactive power electric current.
The composition and the course of work of frequency converter 2 are: civil power hauls synchronous generator 21 (LM324) and produces and the synchronous square wave of civil power same frequency, sinusoidal signal generator 22 (LM324) becomes square wave sinusoidal wave as main order, deliver to and exchange differential amplifier 23 (LM324), with reference to obtaining a quasi-sine-wave behind the frequency converter feedback voltage, modulator 25 (LM339) is by means of from triangular-wave generator 24 (LM339, TC4001) triangular wave becomes 0 of corresponding width to this quasi-sine-wave, 1 signal, driver 26 (M57962L) becomes it break-make that corresponding instruction goes to control electronic power switch device 27 (BSM50GB120DN) again and carries out power amplification, transformer 28 act as DC-isolation, and under the acting in conjunction of capacitor, the output of electronic power switch device 27 is become sinusoidal wave industrial-frequency alternating current and offers load 29 (Z) (1 kilowatt).
At last, telemetry circuit 3 is further described.
When line voltage produces that transient voltage falls or line voltage when being lower than setting value, line voltage Ua is after attenuator 31 decay, the bipolar limit comparer 32 (LM339) of leading up to is delivered to the input end of low pressure amplitude discriminator 33 (LM339), because its value is less than the reference voltage of setting, low pressure amplitude discriminator 33 is acted on respectively through follower 34 (triode 2073, Sheffer stroke gate 4011 and or door CC4078) output high level: function change-over switch K0 achieves K
0--1---K
0-3And K
0--1 '---K
0--3 'Between connect; Bipolar unit K switch 1 is in it and connects the position; Transducer 1 boosts with reference to the line voltage instantaneous value; And frequency converter 2, the beginning frequency conversion.
Line voltage just often, low pressure amplitude discriminator 33 acts on respectively through follower 34 output low levels: function change-over switch K0 achieves K
0--1---K
0--2And K
0--1 '---K
0---2 'Between connect; Bipolar unit K switch 1 is in it and disconnects the position; Transducer 1 begins to produce the seat capacity current; And frequency converter 2, stop frequency conversion.
When line voltage Ua is higher than normal value, after attenuator 31 decay, deliver to the input end of high pressure amplitude discriminator 36 (LM339) by bipolar limit comparer 35 (LM339), because its value is greater than the reference voltage of setting, thereby high pressure amplitude discriminator 35 is acted on respectively through follower 34 output high level: function change-over switch K0 achieves K
0--1--K
0--3And K
0--1 '---K
0--3 'Between connect; Bipolar unit K switch 1 is in it and connects the position; Transducer 1 begins general rectification; Frequency converter 2, the beginning frequency conversion.
The installed capacity of embodiment is 1 kilovolt-ampere.
Claims (2)
1. one kind is comprehensively improved the electricity consumption method for quality, to have the generation capacity current, boost and the transducer of rectification function, frequency converter, telemetry circuit and function change-over switch are critical piece, the function change-over switch is controlled by the telemetry circuit that real-time online detects line voltage, its pro-jobs is in proper order for eliminating the harm that the civil power transient voltage falls, AC voltage-stabilizing and reactive power compensation, produce that transient voltage falls and during the civil power low-voltage at civil power, adopt pulse modulation technology, automatically the electronic power switch device of control change device makes the last voltage of civil power directly be added on the telefault, and then reduce electric current in the inductance suddenly, make the inductance two ends produce voltage, and make the last utmost point low-voltage addition of itself and civil power from civil power, pull energy to charge to filter capacitor, obtaining galvanic current on filter capacitor presses, be that inversion operating switch circuit becomes this direct current with the synchronous specified alternating voltage of civil power and offers load by frequency converter again, when line voltage is higher, alternating current in the load is also from frequency converter, and the required direct current of frequency converter is obtained after the rectifier system routinely by civil power, at civil power just often, the required unsteady flow electricity of load directly from civil power, and makes this system produce the capacitive alternating current through the function change-over switch.
2. one kind is comprehensively improved the device of using electricity quality, comprise that transducer, bipolar unit switch, frequency converter, transducer input end are connected to civil power, output terminal is connected with frequency converter by bipolar unit switch, it is characterized in that being provided with the telemetry circuit of the online detection line voltage of a timing and the function change-over switch that is subjected to its control, load is connected with civil power, frequency converter respectively by the function change-over switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99117667A CN1102254C (en) | 1998-08-13 | 1999-08-12 | Method and equipment for overall increasement of electricity quality |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98116578 | 1998-08-13 | ||
| CN98116578.8 | 1998-08-13 | ||
| CN99117667A CN1102254C (en) | 1998-08-13 | 1999-08-12 | Method and equipment for overall increasement of electricity quality |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1254870A true CN1254870A (en) | 2000-05-31 |
| CN1102254C CN1102254C (en) | 2003-02-26 |
Family
ID=25744720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99117667A Expired - Fee Related CN1102254C (en) | 1998-08-13 | 1999-08-12 | Method and equipment for overall increasement of electricity quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1102254C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844725A (en) * | 2010-05-25 | 2010-09-29 | 许伟新 | Line voltage drop automatic detection control method for hoisting machinery |
| CN101088201B (en) * | 2004-12-22 | 2011-11-09 | Abb技术有限公司 | Electric power flow control |
| CN110879318A (en) * | 2018-09-06 | 2020-03-13 | 台达电子工业股份有限公司 | Commercial power abnormity detection method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347922C (en) * | 2004-09-10 | 2007-11-07 | 清华大学 | Electric energy mass and powerless compensation combination controller |
-
1999
- 1999-08-12 CN CN99117667A patent/CN1102254C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101088201B (en) * | 2004-12-22 | 2011-11-09 | Abb技术有限公司 | Electric power flow control |
| CN101844725A (en) * | 2010-05-25 | 2010-09-29 | 许伟新 | Line voltage drop automatic detection control method for hoisting machinery |
| CN101844725B (en) * | 2010-05-25 | 2012-07-25 | 上海明东集装箱码头有限公司 | Line voltage drop automatic detection control method for hoisting machinery |
| CN110879318A (en) * | 2018-09-06 | 2020-03-13 | 台达电子工业股份有限公司 | Commercial power abnormity detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1102254C (en) | 2003-02-26 |
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Granted publication date: 20030226 Termination date: 20100812 |