CN201286018Y - Electric power filtering compensating electricity economizer - Google Patents
Electric power filtering compensating electricity economizer Download PDFInfo
- Publication number
- CN201286018Y CN201286018Y CNU2008201281943U CN200820128194U CN201286018Y CN 201286018 Y CN201286018 Y CN 201286018Y CN U2008201281943 U CNU2008201281943 U CN U2008201281943U CN 200820128194 U CN200820128194 U CN 200820128194U CN 201286018 Y CN201286018 Y CN 201286018Y
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- CN
- China
- Prior art keywords
- current
- circuit
- expansion joint
- electrical equipment
- compensation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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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- 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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- Inverter Devices (AREA)
Abstract
The utility model relates to an electric power terminal electricity economizer which belongs to the field of electric power protection. The present invention can provide advance or lag reactive-load compensation reactive current, which is used for improving power factor of electric network and realizing dynamic reactive-load compensation, thus saving electric energy. The system comprises two parts. The main function of an instruction current detection circuit is to separate the harmonic current component and fundamental harmonic reactive current from a load current, and send a demand signal of the compensation current after opposite polarity action. The function of a current tracking control circuit is compensation current generated on the basis of a main circuit and calculates the trigger pulse of each switching device of the main circuit, and the pulse acts on the main circuit through a driving circuit. So the power source current contains only the active component of the fundamental harmonic, thereby achieving purposes of harmonic elimination and reactive-load compensation.
Description
Technical field:
The utility model is a kind of safe and reliable battery saving arrangement, is installed in the three-phase alternating current low-voltage circuit, can carry out excellent protection to all power consumption equipments in economize on electricity.
Background technology:
At present, the technology that is used to economize on electricity is mainly voltage-reducing and electricity-saving technology and frequency conversion power saving technology, and the voltage-reducing and electricity-saving technology is primarily aimed at lamp wiring, and lamplight brightness is had certain influence.The frequency conversion power saving technology is primarily aimed at adjustable speed motors such as blower fan, water pump, in economize on electricity, produces a large amount of odd harmonics, and other power consumption equipment and feeder line are constituted security threat.And these two kinds of technology are stronger at load characteristic.Simultaneously, part power-saving technique in parallel is arranged also, economize on electricity by inhibition harmonic wave, surge, amount of electricity saving is very limited.
Summary of the invention:
In order to overcome the drawback of voltage-reducing and electricity-saving technology and frequency conversion power saving technology; not only to reach the positive role of electricity-saving protection; and high fail safe and reliability to be arranged; use parallel electric filtering expansion joint power technology, the upper end of inserting in transformer secondary end, low pressure secondary power distribution cabinet line outlet and the small-sized load branch bus or the bulk loads of low-voltage power system in parallel.Form by control circuit and main circuit, its compensation principle as shown in Figure 1, control circuit is gathered load voltage e1, e2 and current i 1, i2 calculates offset current command value ic, through pwm control circuit with drive IGBT in the main circuit.Main circuit is a voltage source inverter, is used to produce required offset current ic, the harmonic component in the compensating load electric current.
Description of drawings:
Accompanying drawing 1 is electric filtering expansion joint electrical equipment principle framework figure;
Accompanying drawing 3 is an internal circuit diagram;
Accompanying drawing 4 is control loop figure.
Embodiment:
Internal work principle as shown in Figure 2: behind the breaker closing, by the electric capacity charging of preliminary filling resistance to the DC bus, this process continued for 8 seconds, prevented to power on afterwards the moment of DC bus capacitor to be filled to hit.After busbar voltage Vdc reaches rated value, precharge contactor closure.Dc capacitor is outwards exported offset current by IGBT inverter and inner reactor energy is provided as energy-storage travelling wave tube.Simultaneously, dc capacitor provides power supply by the control PCB and the electronic circuit of power supply PCB to inside.
Electric filtering expansion joint electrical equipment is gathered the harmonic wave separation module that current signal is delivered to control PCB by outside CTe, this module is with the first-harmonic component separation, harmonic components is delivered to adjusting and monitoring modular, this module can be injected into system harmonics composition and the IGBT inverter that collects in the electrical network with the compensation harmonic electric current, realizes the humorous wave energy of filtering.
Internal circuit control system and peripheral circuit adopt surface mount elements to install as shown in Figure 3, and the reliability and the antijamming capability of control system are strong.The core of control is a high speed even numbers word signal processing chip, signals collecting at a high speed, in real time, accurately, processing speed is fast.Realized real-time tracking compensation, on phase place, offset harmonic wave fully, safeguarded simply to have the electronic overload defencive function electrical network resonance, harmonic current.Started the triple function of safety, economize on electricity and protection.Product is a cabinet type structure, interior minute PLC wiring board connector part, power source conversion part, circuit control section.
The function of instruction current testing circuit mainly is to isolate harmonic current components and fundamental reactive current from load current, will the command signal of offset current take place after its reversed polarity effect then.The function of current tracking control circuit is the offset current that produces according to main circuit, calculates the trigger impulse of each switching device of main circuit, and this pulse acts on main circuit behind drive circuit.Only contain the real component of first-harmonic like this in the source current, thereby reach harmonic carcellation and the purpose of carrying out reactive power compensation.According to same principle, the negative-sequence current component that electric filtering expansion joint electrical equipment can also right title three-phase circuit compensates.
The main circuit in electric filtering expansion joint electrical equipment control loop generally is made of the PWM inverter as shown in Figure 4.According to the difference of inverter direct-flow side energy-storage travelling wave tube, can be divided into voltage-type electric filtering expansion joint electrical equipment (energy-storage travelling wave tube is an electric capacity) and current mode power filtering compensation electricity-saving appliance (energy-storage travelling wave tube is an inductance).Voltage-type electric filtering expansion joint electrical equipment needs dc voltage is remained unchanged, thereby the inverter AC side to be output as the PWM voltage wave to dc capacitor voltage control when work.And current mode power filtering compensation electricity-saving appliance needs the DC side inductive current is controlled when work, the DC side electric current is remained unchanged, thereby the inverter AC side is output as the PWM current wave.The advantage of voltage-type electric filtering expansion joint electrical equipment is that loss is less, the efficient height.Current mode power filtering compensation electricity-saving appliance is owing to have electric current to flow through all the time on the electric current side inductance, and this electric current will produce than lossy in the inductance internal resistance, so present less employing.
Claims (6)
1, a kind of electric filtering expansion joint electrical equipment; mixing control circuit by integrated master chip and digital-to-analogue forms; it is characterized in that: product is a cabinet type structure; the input power supply partly enters the power source conversion part by the integrated circuit board connector and enters into circuit at last; described integrated circuit board is the surface mount elements of sealing, and the Tu Sanfang lacquer carries out insulated enclosure.
2, according to the described electric filtering expansion joint of claim 1 electrical equipment, it is characterized in that: described line system is divided into current detection circuit and offset current generation circuit again, from different perspectives electrical network is carried out the harmonic elimination compensation.
3, according to the described electric filtering expansion joint of claim 1 electrical equipment, it is characterized in that: the main circuit PWM inverter direct-flow side energy-storage travelling wave tube of described power source conversion part is an electric capacity, is voltage-type filtering compensation electricity-saving appliance.
4, according to the described electric filtering expansion joint of claim 1 electrical equipment, it is characterized in that: the main circuit PWM inverter direct-flow side energy-storage travelling wave tube of described power source conversion part is reactance, is current mode filtering compensation electricity-saving appliance.
5, according to claim 2 or 3 described electric filtering expansion joint electrical equipment, it is characterized in that: by of the electric capacity charging of preliminary filling resistance rack top bus, the back moment of bus capacitor is filled that prevent to power on hit, after busbar voltage Vdc reaches rated value, rack top contactor closure, dc capacitor provides energy as energy-storage travelling wave tube for outwards exporting offset current by IGBT inverter and inner reactor.
6, according to the described electric filtering expansion joint of claim 1 electrical equipment, it is characterized in that: described circuit control section is a three-phase four-wire system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201281943U CN201286018Y (en) | 2008-07-10 | 2008-07-10 | Electric power filtering compensating electricity economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201281943U CN201286018Y (en) | 2008-07-10 | 2008-07-10 | Electric power filtering compensating electricity economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201286018Y true CN201286018Y (en) | 2009-08-05 |
Family
ID=40950986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201281943U Expired - Fee Related CN201286018Y (en) | 2008-07-10 | 2008-07-10 | Electric power filtering compensating electricity economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201286018Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723724A (en) * | 2012-07-04 | 2012-10-10 | 辽宁立德电力电子有限公司 | Novel static dynamic reactive generator device and control method thereof |
| CN103091587A (en) * | 2013-01-24 | 2013-05-08 | 山东新风光电子科技发展有限公司 | Energy-saving inverter test circuit and control method |
| CN103107541A (en) * | 2013-02-07 | 2013-05-15 | 江苏方程电力科技有限公司 | Active filter and adjusting method thereof |
| CN104460804A (en) * | 2014-12-11 | 2015-03-25 | 无锡市锡容电力电器有限公司 | Small current generating device and reactive compensation device debugging system comprising same |
| CN106374504A (en) * | 2015-07-22 | 2017-02-01 | 利思电气（上海）有限公司 | High-voltage harmonic current compensation apparatus with reactive adjustment |
-
2008
- 2008-07-10 CN CNU2008201281943U patent/CN201286018Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723724A (en) * | 2012-07-04 | 2012-10-10 | 辽宁立德电力电子有限公司 | Novel static dynamic reactive generator device and control method thereof |
| CN102723724B (en) * | 2012-07-04 | 2015-09-09 | 辽宁立德电力电子股份有限公司 | A kind of novel static dynamic reactive generator device and method thereof |
| CN103091587A (en) * | 2013-01-24 | 2013-05-08 | 山东新风光电子科技发展有限公司 | Energy-saving inverter test circuit and control method |
| CN103091587B (en) * | 2013-01-24 | 2015-06-17 | 山东新风光电子科技发展有限公司 | Energy-saving inverter test circuit and control method |
| CN103107541A (en) * | 2013-02-07 | 2013-05-15 | 江苏方程电力科技有限公司 | Active filter and adjusting method thereof |
| CN104460804A (en) * | 2014-12-11 | 2015-03-25 | 无锡市锡容电力电器有限公司 | Small current generating device and reactive compensation device debugging system comprising same |
| CN106374504A (en) * | 2015-07-22 | 2017-02-01 | 利思电气（上海）有限公司 | High-voltage harmonic current compensation apparatus with reactive adjustment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20130710 |