CN100341222C - An electric energy quality regulator - Google Patents
An electric energy quality regulator Download PDFInfo
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- CN100341222C CN100341222C CNB2004100610507A CN200410061050A CN100341222C CN 100341222 C CN100341222 C CN 100341222C CN B2004100610507 A CNB2004100610507 A CN B2004100610507A CN 200410061050 A CN200410061050 A CN 200410061050A CN 100341222 C CN100341222 C CN 100341222C
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
The present invention discloses an electric energy quality adjustor which comprises a primary side voltage changer, a high-frequency transformer and an auxiliary side voltage changer, wherein the primary side voltage changer is a primary side AC/AC changer or is a primary side AC/DC changer and a primary side DC/AC changer connected in sequence, and the auxiliary side voltage changer is an auxiliary side AC/AC changer or an auxiliary side AC/DC changer and an auxiliary side DC/AC changer connected in sequence. After input industrial-frequency alternating voltage signals pass through the primary side voltage changer, the input industrial-frequency alternating voltage signals are adjusted into high-frequency voltage signals which are coupled to the auxiliary part of the transformer through the high-frequency transformer, the high-frequency signals of the auxiliary part are restored into industrial-frequency voltage signals after the high-frequency signals pass through the auxiliary side voltage changer, and the output voltage of the adjuster is obtained after the industrial-frequency voltage signals and the voltage of the input end of the electric energy quality adjustor are superimposed. The present invention has advantages of small volume, light weight, wide application range and flexible application locations. In addition, the present invention can be used for the loading smooth voltage adjustment of a common power transformer, and the application prospect of the present invention in an electric system is good.
Description
Technical field
The present invention relates to quality of power supply regulation technology in the electric power system, be specifically related to a kind of electric energy regulator.
Background technology
The quality of power supply is the general name of the electric power system interference problem of numerous single types, essence is quality of voltage, main description supply power voltage departs from the degree of its perfect condition, and its content relates to frequency shift (FS), variation, electro-magnetic transient, wave distortion, three-phase imbalance and voltage fluctuation and flickering etc.
The quality of power supply is the important indicator of power system operation, to electrical network with having crucial meaning per family.At present, there are various non-linear and asymmetric loads in the electric power system, make the quality of power supply be subjected to having a strong impact on.Yet, in modern chemical industry commerce,, strict more requirement has been proposed for the power supply reliability and the quality of power supply owing to the application of robot, automatic production line, precise numerical control machine, Programmable Logic Controller, computer information management system etc. is increasingly extensive.
In general, the connected mode of quality of power supply adjusting device and system depends on its application target.Electric energy regulator in parallel is used to regulate the electric current of being gone into network by load flow, to reduce the non-sine component; The series connection electric energy regulator then is used for the quality of voltage that regulating networks offer load, and the serioparallel electric energy quality adjustor can also suppress voltage oscillation.In engineering practice, quality of power supply adjusting device commonly used comprises: LC or LCR passive filter; Active filter and the unified electric energy regulator and the electronic power transformer that occur in recent years, the characteristics that they are had nothing in common with each other.It is to eliminate system harmonics that passive filter mainly acts on, but might cause the parallel resonance between filter and network impedance, simultaneously, passive filter will be to the electrical network injecting reactive current, in with the network of diode rectifier, unnecessarily produce leading power factor as main power consumption equipment.And active filter is regulated flexibly, and its dynamic characteristic compares to passive filter bigger improvement, and the major part of active power filter is based on the current transformer of switching device pulse modulation technology.And unified electric energy regulator (Unified PowerQuality Conditioner-UPQC) grows up on active filter (Active Power Filter-APF) basis.The main feature of UPQC is: filter (the research [J] of quality of power supply control centre and unified electric energy regulator such as harmonic wave, reactive power compensation, reduction flickering level, Electric Power Automation Equipment, 2003,23 (9): 10～14), its weak point is to have used two Industrial Frequency Transformers, and volume and weight is all bigger.
Summary of the invention
The object of the present invention is to provide the less new electric energy quality adjustor of a kind of volume, this adjuster possesses the characteristics of tandem type and parallel connection type electric energy regulator simultaneously, both can realize the adjusting to supply line's voltage, can suppress the harmonic wave of load again.
A kind of electric energy regulator provided by the invention, this adjuster comprise original edge voltage converter, high frequency transformer and secondary voltage converter; Described original edge voltage converter is a former limit AC/AC converter, perhaps is former limit AC/DC converter and the former limit DC/AC converter that links to each other successively.The secondary voltage converter is a secondary AC/AC converter, perhaps is secondary AC/DC converter and the secondary DC/AC converter that links to each other successively.The power frequency ac voltage of input is modulated into high-frequency signal through former limit converter, this high-frequency signal is coupled to transformer pair side through high frequency transformer, the high-frequency signal of pair side is reduced into the power-frequency voltage signal through the secondary converter again, the output voltage of the adjusted device in voltage stack back of this voltage signal and electric energy regulator input.
The electric energy regulator that the present invention proposes both can be used for the mesohigh transmission line, can be used for low-voltage distributing line again, its applied range, and the application scenario is flexible; And device for high-power power electronic can instantaneous (microsecond level) turn-offs the big electric current of fault in the adjuster, and when line failure, adjuster can the open failure circuit, realizes the protection to system.Specifically, the electric energy regulator that the present invention proposes also has following advantage except the characteristics that possess UPQC:
(1) UPQC has used two Industrial Frequency Transformers, and volume and weight is all bigger, and the electric energy regulator that the present invention proposes has adopted the high frequency modulated technology, has only used a high frequency transformer.The volume of power transformer and its operating frequency are inversely proportional to, so this adjuster volume is little, in light weight.Both be fit to jumbo industrial cousumer and used, and also be fit to average family and use.
(2) electric energy regulator that the present invention is proposed is connected by certain way with common power transformer, can realize the level and smooth pressure regulation of carrying that has of common power transformer, and UPQC does not have this function.So this adjuster has good prospects in application on power system.
Description of drawings
Fig. 1 is a single-phase electric energy quality adjustor topological structure schematic diagram;
Fig. 2 is the structural representation of one of electric energy regulator agent structure;
Fig. 3 is two a structural representation of electric energy regulator agent structure;
Fig. 4 is a three-phase electric energy quality adjustor topological structure schematic diagram.
Embodiment
Introduce the concrete structure of the electric energy regulator of the present invention's proposition below:
As shown in Figure 1, single-phase electric energy quality adjustor E1 has two ports of input and output, and each port all has two binding posts: two input wires terminal a1 and b1, two output wiring terminal b1 and c1.D1 among Fig. 1 and c1 represent two lead-out terminals of single-phase electric energy quality adjustor main part outlet side converter, and a1 directly links to each other with d1.
The present invention includes three parts: original edge voltage converter, high frequency transformer and secondary voltage converter.
Among Fig. 2, former limit AC/AC converter 1 is as the original edge voltage converter, and two input terminal is as input terminal a1 and b1, and secondary AC/AC converter 3 is as the secondary voltage converter, two lead-out terminal is as terminal c1 and d1, and terminal d1 directly links to each other with terminal a1.Two AC/AC converters are connected through high frequency transformer 2.
Among Fig. 3, former limit AC/DC converter 4 and former limit DC/AC converter 5 are as the original edge voltage converter, and secondary AC/DC converter 6 and secondary DC/AC converter 7 are as the secondary voltage converter.Two input terminals of former limit AC/DC converter 4 are as terminal a1 and b1, and two lead-out terminals of secondary DC/AC converter 7 are as terminal c1 and d1.Former limit AC/DC converter 4 links to each other with high frequency transformer 2 through former limit DC/AC converter 5 backs, and high frequency transformer 2 links to each other with secondary DC/AC converter 7 through secondary AC/DC converter 6.
More than said input be relative circuit with output, in fact the electric energy regulator that proposes of the present invention can be realized the two-way flow of power as required.
The electric energy regulator basic functional principle that the present invention proposes is:
Operation principle based on the single-phase electric energy quality adjustor of structure shown in Figure 2 is as follows: the input power frequency ac voltage of electric energy regulator is modulated into the high-frequency ac voltage signal through former limit AC/AC converter 1, this high-frequency ac voltage signal is coupled to transformer pair side through high frequency transformer 2, the high-frequency signal of pair side is again through being reduced to the power-frequency voltage signal behind the secondary AC/AC converter 3, the output voltage of the adjusted device in voltage stack back of this voltage signal and electric energy regulator input.When the conditioner outlet end change in voltage, can corresponding change adjuster in secondary AC/AC converter 3 output voltages, reach the purpose of stable governor output voltage.In addition, the reactive power of all right bucking-out system.
When the conditioner outlet end electric current is load current generation distortion, because the adjuster input is in parallel with former limit AC/AC converter 1, by control, can make adjuster play the effect of active power filter like this, suppress of the influence of load harmonic current electrical network to former limit AC/AC converter 1.
Operation principle based on the single-phase electric energy quality adjustor of structure shown in Figure 3 is: electric energy regulator input power-frequency voltage is a direct voltage by AC/DC converter 4 rectifications of former limit at first, be modulated to high frequency square wave behind the former limit of the direct voltage process DC/AC converter 5, high frequency square wave is coupled to transformer pair side through high frequency transformer 2, the high-frequency signal of pair side is a direct current through 6 rectifications of secondary AC/DC converter, direct voltage is reduced to the power-frequency voltage signal through secondary DC/AC converter 7 again, the output voltage of the adjusted device of this voltage signal and adjuster input terminal voltage stack back.The principle and the aforementioned electric energy regulator of the single-phase electric energy quality adjustor adjusting quality of power supply of this structure are similar, different is, and what to play regulating action in the aforementioned electric energy regulator is former limit AC/ AC converter 1 and 3 among Fig. 2, and the electric energy regulator of this structure relies on former limit AC/DC converter 4 and secondary DC/AC converter 7 among Fig. 3 to regulate the qualities of power supply.Its limit, Central Plains AC/DC converter 4 suppresses the influence of load-side distortion current to the net side, and it is constant that secondary DC/AC converter 7 mainly works to keep the electric energy regulator output voltage.
The three-phase electric energy quality adjustor also has two ports of input and output, its topological structure as shown in Figure 4, each port all has three binding posts: three-phase input wires terminal a2, b2, c2, three single-phase output wiring terminal d2, f, h.D2 and e, f and g, h and i are respectively two lead-out terminals of three single-phase invertors of outlet side.Terminal e, g, i are directly and terminal a2, b2, the corresponding connection of c2.
Three-phase electric energy quality adjustor main part similar is in Fig. 3, itself and single-phase electric energy quality adjustor main part difference shown in Figure 3 are as follows: three-phase electric energy quality adjustor main part input side is a three phase rectifier, and single-phase regulator body partly is single-phase rectifier.Secondary side's number of windings of the high frequency transformer that both adopt and the output phase number that is determined thereof are also different.Single-phase electric energy quality adjustor high frequency transformer pair side is a winding, and three-phase is three windings, and each winding all connects one group of corresponding transformation system, obtains an output phase.For N phase electric energy regulator, input has N terminal, and output has N terminal, and there is N winding high frequency transformer pair side, obtains output mutually, an exportable N phase altogether respectively behind one group of transformation system.
The present invention is further illustrated for three examples below.
Example one: based on the single-phase electric energy quality adjustor of structure one (as shown in Figure 2).
The line voltage distribution grade is 6300V, and capacity is 1000kVA.Limit, Fig. 2 Central Plains AC/AC converter 1 is made up of 4 bidirectional switchs, each bidirectional switch is made of a unit IGBT (Insulated Gate Bipolar Transistor) the module differential concatenation of two 3300V/100A, by former limit AC/AC converter 1, power frequency ac voltage is modulated into the high-frequency ac voltage into the 6k hertz; Fig. 2 medium-high frequency transformer 2 is pressed 200kVA, the design of switching frequency 6k hertz; Secondary AC/AC converter 3 is made up of 4 bidirectional switchs, each bidirectional switch is made of a unit IGBT (Insulated Gate Bipolar Transistor) the module differential concatenation of two 1700V/400A, and high-frequency ac voltage is reduced to power-frequency voltage through secondary AC/AC converter 3.
Example two: based on the single-phase electric energy quality adjustor of structure two (as shown in Figure 3).
The line voltage distribution grade is 6300V, and capacity is 1000kVA.Limit, Fig. 3 Central Plains AC/DC converter 4 is formed single-phase fully controlled bridge by two unit IGBT (the Insulated Gate Bipolar Transistor) module of two 3300V/100A, and by former limit AC/DC converter 4, power frequency ac voltage is rectified into direct voltage; Limit, Fig. 3 Central Plains DC/AC converter 5 is the high frequency modulated part, is made of the two unit IGBT modules of two 3300V/100A, and by former limit DC/AC converter 5, direct voltage is modulated into the high frequency square wave into the 5k hertz; Fig. 3 medium-high frequency transformer 2 is pressed 200kVA, switching frequency 5k hertz design, and secondary AC/DC converter 6 is the reduction part among Fig. 3, is made of the two unit IGBT modules of two 1700V/400A, by secondary AC/DC converter 6, high frequency square wave is reduced to direct voltage; Secondary DC/AC converter 7 is formed single-phase fully controlled bridge by two unit IGBT (the Insulated GateBipolar Transistor) module of two 1700V/400A among Fig. 3, and by secondary DC/AC converter 7, direct voltage is a power frequency ac voltage by inversion.
Example three: based on the three-phase electric energy quality adjustor of structure two.
The line electric pressure of three-phase line is 380V, and capacity is 10kVA.Three-phase electric energy quality adjustor input side AC/DC converter is formed three-phase full-controlled bridge by the two unit IGBT modules of three 1200V/50A, and by input side AC/DC converter, power frequency ac voltage is rectified into direct voltage; High frequency modulated partly is the DC/AC converter, is made of the two unit IGBT modules of two 1200V/50A, and by this part, direct voltage is modulated into the high frequency square wave into the 5k hertz; High frequency transformer is pressed 2kVA, the design of switching frequency 5k hertz.The former side of high frequency transformer is a winding, and pair side is three windings.Phase in the corresponding three-phase system of each winding of its pair side.The high frequency square wave of each phase is a direct voltage by the reduction partial reduction of correspondence, and reduction part is the AC/DC converter, is the single-phase fully controlled bridge that the IGBT module by two 600V/100A Unit two constitutes; Direct voltage is a power frequency ac voltage by the single-phase fully controlled bridge DC/AC converter inversion that the two unit IGBT modules of two 600V/100A constitute again.
Claims (1)
1, a kind of electric energy regulator is characterized in that:
This adjuster comprises original edge voltage converter, high frequency transformer and secondary voltage converter;
Described original edge voltage converter is a former limit AC/AC converter, perhaps is former limit AC/DC converter and the former limit DC/AC converter that links to each other successively;
Described secondary voltage converter is a secondary AC/AC converter, perhaps is secondary AC/DC converter and the secondary DC/AC converter that links to each other successively;
Be modulated into high-frequency voltage signal behind the power frequency ac voltage signal process original edge voltage converter of input, this high-frequency signal is coupled to transformer pair side through high frequency transformer again, be reduced to the power-frequency voltage signal behind the high-frequency signal process secondary voltage converter of pair side, the output voltage of the adjusted device in voltage stack back of this power-frequency voltage signal and electric energy regulator input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100610507A CN100341222C (en) | 2004-11-05 | 2004-11-05 | An electric energy quality regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100610507A CN100341222C (en) | 2004-11-05 | 2004-11-05 | An electric energy quality regulator |
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| Publication Number | Publication Date |
|---|---|
| CN1604420A CN1604420A (en) | 2005-04-06 |
| CN100341222C true CN100341222C (en) | 2007-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100610507A Expired - Fee Related CN100341222C (en) | 2004-11-05 | 2004-11-05 | An electric energy quality regulator |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902130B (en) * | 2010-07-21 | 2012-08-15 | 华中科技大学 | Variable-frequency power transmission and distribution system |
| CN102377361A (en) * | 2010-08-06 | 2012-03-14 | 珠海银通新能源有限公司 | AC (alternating current)/DC (direct current) bidirectional magnetic resonance inverter |
| CN105071664B (en) * | 2015-08-07 | 2017-06-16 | 国家电网公司 | A kind of wide-range voltage source of power power electronic power supply and electrician's formula power sources in series |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600667B2 (en) * | 2000-07-06 | 2003-07-29 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electronic transformer |
| CN2739858Y (en) * | 2004-11-05 | 2005-11-09 | 华中科技大学 | Electric energy quality regulator |
-
2004
- 2004-11-05 CN CNB2004100610507A patent/CN100341222C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600667B2 (en) * | 2000-07-06 | 2003-07-29 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electronic transformer |
| CN2739858Y (en) * | 2004-11-05 | 2005-11-09 | 华中科技大学 | Electric energy quality regulator |
Non-Patent Citations (2)
| Title |
|---|
| IEEE Transactions on Power Electronics Moonshik Kang,第1133-1141页,Analysis and Design of Electronic Transformers forElectric Power Distribution System 1999 * |
| 继电器 黄贻煜，毛承雄，陆继明，范澍，第35-39页，电力电子变压器在输电系统中的控制策略研究 2004 * |
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| CN1604420A (en) | 2005-04-06 |
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