CN101895122B - Output circuit of three-phase power voltage regulator - Google Patents

Output circuit of three-phase power voltage regulator Download PDF

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Publication number
CN101895122B
CN101895122B CN 201010202570 CN201010202570A CN101895122B CN 101895122 B CN101895122 B CN 101895122B CN 201010202570 CN201010202570 CN 201010202570 CN 201010202570 A CN201010202570 A CN 201010202570A CN 101895122 B CN101895122 B CN 101895122B
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CN
China
Prior art keywords
phase
output
circuit
transformer
electric
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Application number
CN 201010202570
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Chinese (zh)
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CN101895122A (en
Inventor
孙长荣
孙继承
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珠海科达信电子科技有限公司
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Priority to CN 201010202570 priority Critical patent/CN101895122B/en
Publication of CN101895122A publication Critical patent/CN101895122A/en
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Publication of CN101895122B publication Critical patent/CN101895122B/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems 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
    • Y02B70/3225Demand response systems, e.g. load shedding, peak shaving
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/50Arrangements for eliminating or reducing asymmetry in polyphase networks
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems
    • Y04S20/222Demand response systems, e.g. load shedding, peak shaving

Abstract

The invention discloses an output circuit of a three-phase power voltage regulator, and aims at providing the output circuit of the three-phase power voltage regulator, which can protect the normal work of an electric device when the electric device has a single-phase impact load with larger power. The output circuit comprises a three-phase voltage regulation circuit and an output control circuit, wherein the output control circuit comprises a step-down transformer TB (1) and a single-phase output wire connecting terminal (2), the primary of the step-down transformer TB (1) is 380V, the secondary is 220V, the primary of the single-phase step-down transformer TB (1) is connected with any two phases of the output end of the three-phase voltage regulation circuit, the three-phase electric device is connected with the output end of the three-phase voltage regulation circuit, and the single-phase impact load is connected with the single-phase output wire connecting terminal (2). The output circuit can be widely applied in the field of power voltage regulators and is particularly applicable to electric places which contain the single-phase high-power impact loads in the electric devices.

Description

Output circuit of three-phase power voltage regulator
Technical field
The present invention relates to the electric power voltage-stabilizer field, particularly contain the electricity consumption place of single-phase high-power impact load in the three-phase power voltage regulator rear class power consumption equipment of three-phase and four-line input.
Background technology
The pressurizer of generally using in the electric power system is three-phase power voltage regulator, three-phase four-wire system is adopted in its input and output usually, power consumption equipment can be that three-phase (3 Φ 380V) also can be single-phase (single-phase 220V), makes the power of power consumption equipment three-phase in a basic balance in design and construction as far as possible.Because with the difference of electric loading and power supply environment, may occur not is pressurizer fault and affect the situation of the normal operation of pressurizer, and for example: 1, the electricity consumption place is far away apart from distribution transformer, and the impedance of supply line is larger; 2, the conductor cross-section of transmission line is selected less than normally, and the neutral line (zero line N) is designed to 1/2nd of phase line, causes the zero line impedance further to strengthen; 3, contain the load of single-phase high-power impact in the power consumption equipment, such as power consumption equipments such as single-phase motor, single-phase air-conditionings.
The starting current of motor load is 6~8 times of specified revolution electric current, the large electric current of the startup of single-phase electric devices causes threephase load seriously uneven in above-mentioned power utilization environment, excessive single-phase load electric current is got back to the neutral point of supply transformer again through zero line (N) to power consumption equipment via the phase line of supply line, instantaneous large-current wherein one reaches the very large impedance drop of zero line generation mutually three-phase power line, single-phase large electric current causes serious neutral point excursion, cause a wherein phase voltage moment reduction and in addition two-phase voltage instantaneous rising, phase voltage moment that load is large is fallen and surpasses the under-voltage protection value, to making pressurizer carry out " under-voltage protection "; The little two-phase voltage instantaneous of load raises and surpasses the overvoltage protection value, and pressurizer is carried out " overvoltage protection ", and " under-voltage protection " and " overvoltage protection " all can make the output of circuitry cuts power supply.Pressurizer cuts off output back loading electric current and reduces to zero; the pressurizer input voltage returns to normal value; power consumption equipment is restarted pressurizer and is again carried out " under-voltage protection " and " overvoltage protection " and go round and begin again and form vibration, causes the non-fault of pressurizer own and can not normally move.
In sum, output circuit of three-phase power voltage regulator of the prior art exists when the impedance that the single-phase impact load of relatively high power and supply line are arranged in the power consumption equipment is larger, when especially the zero line impedance is larger, causes pressurizer normally not move and affect the defective of the normal operation of power consumption equipment.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of output circuit of three-phase power voltage regulator with single-phase high power output function is provided.When the impedance that the single-phase impact load of relatively high power and supply line are arranged in the power consumption equipment was larger, when especially the zero line impedance is larger, thereby pressurizer can normally move the normal operation that ensures power consumption equipment.
The technical solution adopted in the present invention is: the present invention includes three-phase voltage stabilizing circuit and output control circuit, described three-phase voltage stabilizing circuit comprises three-phase pressurizer and input, the output switch element, described output control circuit comprises step-down transformer TB, single-phase output wiring terminal, the elementary of described step-down transformer TB is 380V, secondary is 220V, any two of the elementary and described three-phase circuit output end of pressure-stabilizing of described step-down transformer TB is connected, secondary and the described single-phase outlet terminal sub-connection of described step-down transformer TB, the capacity of described step-down transformer TB is suitable with electric loading with the single-phase impact that is connected.
Three phase electric equipment is connected with described three-phase circuit output end of pressure-stabilizing, single-phase impact electric loading and described single-phase outlet terminal sub-connection.
The invention has the beneficial effects as follows: it comprises three-phase voltage stabilizing circuit and output control circuit owing to the present invention, described three-phase voltage stabilizing circuit comprises three-phase pressurizer and input, the output switch element, described output control circuit comprises step-down transformer TB, single-phase output wiring terminal, the elementary of described step-down transformer TB is 380V, secondary is 220V, any two of the elementary and described three-phase circuit output end of pressure-stabilizing of described step-down transformer TB is connected, secondary and the described single-phase outlet terminal sub-connection of described step-down transformer TB, the capacity of described step-down transformer TB is suitable with electric loading with the single-phase impact that is connected, three phase electric equipment is connected with described three-phase circuit output end of pressure-stabilizing, single-phase impact electric loading and described single-phase outlet terminal sub-connection.The present invention can be used for dissimilar electric power voltage-stabilizer circuit, output at voltage regulator circuit has increased step-down transformer TB and single-phase equipment connection, the load current of the single-phase electric devices zero line N that no longer flows through has stopped the neutral point drifting that the zero line impedance voltage causes; The electric line electric current only is 0.58 times of the single-phase electric devices electric current, so reduced the impedance drop of electric line, has guaranteed the normal operation of pressurizer and power consumption equipment.
Description of drawings
Fig. 1 is that the present invention is electrical block diagram.
Embodiment
As shown in Figure 1, the present invention includes three-phase voltage stabilizing circuit and output control circuit, described three-phase voltage stabilizing circuit comprises three-phase pressurizer and input, the output switch element, described output control circuit comprises step-down transformer TB 1, single-phase output wiring terminal 2, the elementary of described step-down transformer TB 1 is 380V, secondary is 220V, any two of the elementary and described three-phase circuit output end of pressure-stabilizing of described step-down transformer TB 1 is connected, secondary and the described single-phase output wiring terminal 2 of described step-down transformer TB 1 is connected, and the capacity of described step-down transformer TB 1 is suitable with electric loading with the single-phase impact that is connected.Three phase electric equipment is connected with described three-phase circuit output end of pressure-stabilizing, and single-phase impact is connected with described single-phase output wiring terminal 2 with electric loading.
The present invention is applicable to the reform of the voltage regulator circuit of various voltage stabilizing forms, as: parameter voltage stabilizator, mechanical regulating compensation formula pressurizer, Induction Regulation formula pressurizer and novel thyristor non-contact voltage stabilizer.This has the output circuit of three-phase power voltage regulator of single-phase high power output function, just the output end of pressure-stabilizing at pressurizer installs a 380V/220V step-down transformer TB additional, step-down transformer TB primary voltage is that 380V is connected on any two phase lines of voltage stabilizing output, and the power of step-down transformer TB is determined by the capacity of single-phase impact power consumption equipment.This moment single-phase impact power consumption equipment the large electric current neutral line (zero line N) of no longer flowing through, stopped the neutral point drifting that the zero line impedance voltage causes; Transformer TB primary voltage has improved 1.73 times than secondary voltage, the primary current of transformer TB (transmission line electric current) only is 0.58 times of single-phase electric devices electric current, in the situation that the constant transmission line electric current that reduced of power consumption equipment, reduced the impedance drop of electric line, improve the power supply capacity of electric line, guaranteed the normal operation of pressurizer and power consumption equipment.But the present invention's extensive use electric power voltage-stabilizer field is specially adapted to contain in the three-phase power voltage regulator rear class power consumption equipment of three-phase and four-line input the electricity consumption place of single-phase high-power impact load.

Claims (2)

1. output circuit of three-phase power voltage regulator, it comprises three-phase voltage stabilizing circuit and output control circuit, described three-phase voltage stabilizing circuit comprises three-phase pressurizer and input, the output switch element, it is characterized in that: described output control circuit comprises step-down transformer TB (1), single-phase output wiring terminal (2), the elementary of described step-down transformer TB (1) is 380V, secondary is 220V, any two of the elementary and described three-phase circuit output end of pressure-stabilizing of described step-down transformer TB (1) is connected, secondary and the described single-phase output wiring terminal (2) of described step-down transformer TB (1) is connected, and the capacity of described step-down transformer TB (1) is suitable with electric loading with the single-phase impact that is connected.
2. output circuit of three-phase power voltage regulator according to claim 1, it is characterized in that: three phase electric equipment is connected with described three-phase circuit output end of pressure-stabilizing, and single-phase impact is connected with described single-phase output wiring terminal (2) with electric loading.
CN 201010202570 2010-06-13 2010-06-13 Output circuit of three-phase power voltage regulator CN101895122B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010202570 CN101895122B (en) 2010-06-13 2010-06-13 Output circuit of three-phase power voltage regulator

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Application Number Priority Date Filing Date Title
CN 201010202570 CN101895122B (en) 2010-06-13 2010-06-13 Output circuit of three-phase power voltage regulator

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CN101895122A CN101895122A (en) 2010-11-24
CN101895122B true CN101895122B (en) 2013-01-09

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CN102377247B (en) * 2011-12-06 2013-10-16 苏州易米克电子有限公司 Power supply device with monitoring function

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2907025Y (en) * 2006-05-24 2007-05-30 珠海科达信电子科技有限公司 Three-phase power voltage regulator with automatic phase sequence switchover function
CN2919314Y (en) * 2006-05-24 2007-07-04 珠海科达信电子科技有限公司 Electrical manostat with function of outputting from three single-phases respectively
US7576449B2 (en) * 2006-01-27 2009-08-18 Sma Solar Technology Ag Method for converting direct voltage into three-phase alternating voltage
CN201699422U (en) * 2010-06-13 2011-01-05 珠海科达信电子科技有限公司 Output circuit for three-phase power voltage stabilizer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001350526A (en) * 2000-06-09 2001-12-21 Mitsubishi Electric Corp Power saving circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7576449B2 (en) * 2006-01-27 2009-08-18 Sma Solar Technology Ag Method for converting direct voltage into three-phase alternating voltage
CN2907025Y (en) * 2006-05-24 2007-05-30 珠海科达信电子科技有限公司 Three-phase power voltage regulator with automatic phase sequence switchover function
CN2919314Y (en) * 2006-05-24 2007-07-04 珠海科达信电子科技有限公司 Electrical manostat with function of outputting from three single-phases respectively
CN201699422U (en) * 2010-06-13 2011-01-05 珠海科达信电子科技有限公司 Output circuit for three-phase power voltage stabilizer

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