CN108493964A - Mixed type three-phase load unbalance automatic regulating apparatus - Google Patents
Mixed type three-phase load unbalance automatic regulating apparatus Download PDFInfo
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- CN108493964A CN108493964A CN201810357955.0A CN201810357955A CN108493964A CN 108493964 A CN108493964 A CN 108493964A CN 201810357955 A CN201810357955 A CN 201810357955A CN 108493964 A CN108493964 A CN 108493964A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
Mixed type three-phase load unbalance automatic regulating apparatus of the present invention belongs to distribution system three-phase load regulation technology field, solves the load unbalanced technical problem of distribution line；The present invention includes master controller, three-phase intelligent leveling module, compensating electric capacity, cooling system, wireless module, display module, mutual inductor module, periphery switch and protection module；Master controller is responsible for the cooperation operation of the mechanism and each module of entire mixed compensation；Three-phase intelligent leveling module realizes the linear transformation of three-phase load, improves power factor (PF), the major functions such as burning voltage；Compensating electric capacity realizes the phase step type compensation of active reactive；Cooling system realization device internal heat dissipating；Wireless module realization device ad hoc network function；Display module, which is realized, shows electric current, voltage value；Mutual inductor module is responsible for acquiring current signal；Periphery switch is realized to forceful electric power, the control of electricity and capacitance；Protection module divides lightning-protection module and overcurrent protection module line at protecting the stable operation of complete machine.
Description
Technical field
The invention belongs to distribution system three-phase load regulation technology fields, and in particular to a kind of mixed type three-phase load is uneven
Weigh automatic regulating apparatus.
Background technology
In Distribution network system, there are a large amount of single-phase, asymmetric, non-linear, impact loads, due to early stage
Electrical reticulation design is planned inconsiderate, it may appear that the case where a large amount of single-phase loads concentrate on a phase or two-phase, these unbalanced load meetings
So that distribution system is generated three-phase imbalance, leads to the imbalance of power supply system three-phase voltage, electric current.
It starts to walk than later, especially in Distribution Automation Technology application aspect, perhaps in terms of three-phase imbalance improvement in China
More Utilities Electric Co.s all take following measures：The line footpath of overstriking branch line phase line reduces line loss, improves power quality；It adopts
Single-phase promotion transformer is installed at branch line or is solved the problems, such as using the method for shortening radius of electricity supply；Directly to original main transformer
Depressor carries out increase-volume；Reactive power compensation case or comprehensive distribution box are installed in transformer lower end；Manually switching method etc..These modes
Despite consuming a large amount of manpower and materials, but all cannot be from three-phase load unbalance is solved the problems, such as at all, to power quality
Improvement produces little effect.
Invention content
The main object of the present invention is a kind of mixed type three-phase load unbalance automatic regulating apparatus, and it is negative to solve distribution line
The unbalanced technical problem of lotus.
The present invention provides following technical scheme to solve above-mentioned technical problem：
Mixed type three-phase load unbalance automatic regulating apparatus of the present invention include master controller, three-phase intelligent leveling module,
Compensating electric capacity, cooling system, wireless module, display screen, indicator light, temperature controller, mutual inductor module, periphery switch, protection
Module, connecting terminal, zero-emission connecting terminal；
Master controller is intelligent controller；Three-phase intelligent leveling module includes power electronic devices, high-power IGBT and DSP
Module；DSP module has multiple RAM access units, realizes the backup of data multiple data；By operating display, realize to DSP work(
The configuration of energy；
The capacitor that compensating electric capacity is Kvar grades；Cooling system includes temperature control device and fan；Periphery switch includes open circuit
Device, three-phase be spaced apart, single-phase is spaced apart and capacitor fling-cut switch；Protection module includes lightning-protection module and overcurrent protection module；Mutual inductor
Module includes current transformer and mutual inductor interstar connection row；Wireless module is LORA modules, is responsible for wireless data transmission；
Master controller penetrates through modules, is used for the control and operation of whole equipment；Display screen is for showing every electric current
Value, voltage value, balancing information, fault message and power factor (PF)；Temperature controller is connect by conducting wire with fan, temperature controller
Main controller is transmitted information to by RS485；Three phase mains A, B, C access power supply by breaker, and zero curve is connected to zero-emission and connects
Line terminals；Current transformer divides three groups of three-phase to be connected to mutual inductor interstar connection row；
Each three-phase is spaced apart to be opened for controlling the power supply of corresponding three facies patterns capacitor fling-cut switch and three-phase leveling module
With pass, play a protective role when transient high-current triggers；It is each single-phase to be spaced apart for controlling corresponding unipolar type capacitor switching
Switch；Three-phase intelligent leveling module is connected with main controller, and information is transmitted by network interface, realizes active power compensation, finally reaches
Balancing the load effect；Arrester is mounted at power import, plays the role of lightning protection to the operation of whole equipment.
Three-phase intelligent leveling module uses voltage type PWM wave convertor circuit structure, IGBT power conversion modules circuits to use
Three-level topology structure.
The operation principle of the present invention：Master controller is responsible for the mechanism of entire mixed compensation (active reactive) and each module
Cooperation operation；Three-phase intelligent leveling module realizes the linear transformation of three-phase load, improves power factor (PF), the main work(such as burning voltage
Energy；Compensating electric capacity realizes the phase step type compensation of active reactive；Cooling system realization device internal heat dissipating；Wireless module realization device
Ad hoc network function；Display screen, which is realized, shows electric current, voltage value；Mutual inductor module is responsible for acquiring current signal；Periphery switch is realized
Control to three-phase intelligent leveling module and capacitance；Protection module divides lightning-protection module and overcurrent protection module line at protection complete machine
Stable operation.
The workflow of the present invention：Three intelligent leveling modules use voltage type PWM wave convertor circuit structure, IGBT power
Conversion module circuit uses three-level topology structure, inverter output voltage waveform to be improved closer to sine wave, inversion efficiency；
It is alternate load unbalanced that the present apparatus in powered on moment can analyze three according to the AC sampling of AD sample circuits
Situation, DSP operation go out to need the current value compensated and phase, be sent out by FPGA (field programmable gate array) signal generator
Pwm signal drives to IGBT, and generating a current signal met the requirements by three-phase intelligent leveling module is sent in system, real
Existing mixed type three-phrase burden balance adjusting, dynamic passive compensation, harmonic wave control functional requirement.
The function that the present invention realizes：The alternate compensation of passive capacitive, the alternate compensation of active capacitor and the compensation of Intelligent Hybrid type；
The alternate compensation of passive capacitive：It is realized by master controller, compensating electric capacity module, capacitor fling-cut switch；Pass through master control
System control capacitor fling-cut switch is using Wang Shi laws and alternate by compensating electric capacity module for compensating in the alternate overlap joint capacitor of circuit
It is idle, to shift active power.Using power factor as main criterion when input, in conjunction with the difference of alternate active power, preferentially
Put into the big capacitance of alternate active power difference.
The alternate compensation of active capacitor：It is realized by master controller and three-phase intelligent leveling module；Concrete principle is：System
When operation, by current transformer (CT) real-time detecting system electric current, the collected current informations of CT are then issued into main control
Device is handled, after being analyzed by master controller, three-phase intelligent leveling module it finds that system current imbalance state,
Calculating three-phase current by two CSTR algorithm reaches the current value converted needed for equilibrium state simultaneously, and controlling IGBT by PWM opens
It closes, electric current is distributed to uneven phase, the final balance for realizing three-phase current.
Intelligent Hybrid type compensates：By master controller, three-phase intelligent leveling module, compensating electric capacity module, capacitor fling-cut switch
To realize；In conjunction with passive capacitive it is alternate compensation and the alternate compensation of active capacitor function, when occur out-of-balance current it is excessive when,
It is preferential to start the alternate compensation of passive capacitive, then start the alternate compensation of active capacitor further according to difference, finally reaches required electricity
Offset is flowed, the two is complementary, greatly promotes the equilibrium response speed of system, finally realizes three-phrase burden balance.
The advantageous effects of the present invention：This patent is a variety of with modern power electronics technology, Technology of Dynamic Reactive Power Compensation etc.
Technology is the novel distribution network intelligence compensation device of theoretical foundation research and development；Using based on DSP+FPGA Digital Control Systems, protect
Realization precision, the reliability for having demonstrate,proved pwm pulse waveform reduce system and generate overvoltage, overcurrent thing because running software crashes
Therefore probability；It solves the problems, such as that distribution line is load unbalanced, low-voltage governing problem, end electric load is realized automatic on the spot
Compensation and regulatory function, are finally reached the purpose of three-phrase burden balance, to improve power quality.
Description of the drawings
Fig. 1 is the structural schematic diagram of the front view of the mixed type three-phase load unbalance automatic regulating apparatus of the present invention；
Fig. 2 is the structural schematic diagram of the rearview of the mixed type three-phase load unbalance automatic regulating apparatus of the present invention；
Fig. 3 is the relationship connection diagram of the mixed type three-phase load unbalance automatic regulating apparatus of the present invention；
Fig. 4 is the system composition schematic diagram of the mixed type three-phase load unbalance automatic regulating apparatus of the present invention；
Fig. 5 is the electrical block diagram of the mixed type three-phase load unbalance automatic regulating apparatus of the present invention.
Fig. 6 is the work flow diagram of the mixed type three-phase load unbalance automatic regulating apparatus of the present invention.
Specific implementation mode
The present invention is further elaborated below in conjunction with the accompanying drawings.
Referring to attached drawing 1-5, mixed type three-phase load unbalance automatic regulating apparatus of the present invention includes master controller, three-phase intelligence
It can leveling module, compensating electric capacity, cooling system, wireless module, display screen, indicator light, temperature controller, mutual inductor module, outer
Enclose switch, protection module, connecting terminal, zero-emission connecting terminal；
Master controller is intelligent controller；Three-phase intelligent leveling module includes power electronic devices, high-power IGBT and DSP
Module；DSP module has multiple RAM access units, realizes the backup of data multiple data；DSP display controls, liquid crystal display and control
Panel is mainly realized to visualize DSP and be controlled, and by operating display, realizes the configuration to DSP functions；
The capacitor that compensating electric capacity is Kvar grades；Cooling system includes temperature control device and fan；Periphery switch includes open circuit
Device, three-phase be spaced apart, single-phase is spaced apart and capacitor fling-cut switch；Protection module includes lightning-protection module and overcurrent protection module；Mutual inductor
Module includes current transformer and mutual inductor interstar connection row；Wireless module is LORA modules, is responsible for wireless data transmission；
Primary module device penetrates through modules, is used for the control and operation of whole equipment；Display screen is for showing every electric current
Value, voltage value, balancing information, fault message and power factor (PF)；Temperature controller is connect by conducting wire with fan, temperature controller
Main controller is transmitted information to by RS485；Three phase mains A, B, C access power supply by breaker, and zero curve is connected to zero-emission and connects
Line terminals；Current transformer divides three groups of three-phase to be connected to mutual inductor interstar connection row；
Each three-phase is spaced apart to be opened for controlling the power supply of corresponding three facies patterns capacitor fling-cut switch and three-phase leveling module
With pass, play a protective role when transient high-current triggers；It is each single-phase to be spaced apart for controlling corresponding unipolar type capacitor switching
Switch；Three-phase intelligent leveling module is connected with main controller, and information is transmitted by network interface, realizes active power compensation, finally reaches
Balancing the load effect；Arrester is mounted at power import, plays the role of lightning protection to the operation of whole equipment.
Three-phase intelligent leveling module uses voltage type PWM wave convertor circuit structure, IGBT power conversion modules circuits to use
Three-level topology structure.
Referring to attached drawing 6, it is assumed that A, B, C threephase load electric current is respectively：5A, 10A and 15A, the at this time three-phase current of system
There is imbalance, the state of three-phase current complete equipilibrium should be all 10A of A, B, C three-phase current；
PLAI at runtime, can be by current transformer (CT) real-time detecting system electric current, then by the collected electricity of CT
Stream information is issued internal controller and is handled, after being analyzed by controller, PLAI it finds that system current imbalance
State, while three-phase current is calculated by two CSTR algorithm and reaches the current value converted needed for equilibrium state, A phase currents reach
Equilibrium state then needs to increase the electric current of 5A, and B phase currents are just that 10A is not necessarily to adjustment, and C phase currents reach equilibrium state and then need
Reduce 5A electric current, calculate complete after, controller drives IGBT to act by IGBT drive circuit so that electric current from
System C phases flow into PLAI 5A electric currents, and outflow 5A electric currents are to system A phases inside PLAI, so that A, B, C three-phase current
It all redistributes as 10A, and the three-phase total current of system remains unchanged.
This series of calculating and control action are all completed in a short period of time, also, in this course
PLAI only plays the role of one and shunts again, only need to consume the energy of very small part (such as fan running, control device
The energy expenditure of energy expenditure, switching device).Size with the current value usually described in us is as current effective value,
The virtual value of the size of PLAI shunt currents within a certain period of time.And actually PLAI compensating three-phase unbalances when switching device
Action is all instantaneous.Instantaneous at some, the AC rectification of C phases is that direct current is stored in later by the IGBT actions of C phases
In bus capacitor inside PLAI.And, the IGBT action of A phase instantaneous at another, fill bus capacitor (A, B, C inside PLAI
Public same group of bus capacitor) on direct current carry out inversion, be then released into system A phases.
The action of PLAI is instantaneous, and it is balance that it, which receives and dispatches the virtual value of electric current, within certain a period of time, therefore
The result that can be acted is interpreted as shunting function so that the virtual value of system three-phase current reaches an equilibrium state.
When system three-phase current all deviates equalization point, situation that compensation principle deviates equalization point with above-described two
It is similar.Its cardinal principle is exactly then to be taken out in certain mutually additional electric current storage to PLAI bus capacitors from bus capacitor
Current compensation needs certain phase compensated.
Claims (2)
1. mixed type three-phase load unbalance automatic regulating apparatus, which is characterized in that including master controller, three-phase intelligent leveling mould
Block, cooling system, wireless module, display screen, indicator light, temperature controller, mutual inductor module, periphery switch, is protected at compensating electric capacity
Protect module, connecting terminal, zero-emission connecting terminal；
Master controller is intelligent controller；Three-phase intelligent leveling module includes power electronic devices, high-power IGBT and DSP moulds
Block；DSP module has multiple RAM access units, realizes the backup of data multiple data；DSP display controls, liquid crystal display and control plane
Plate is mainly realized to visualize DSP and be controlled, and by operating display, realizes the configuration to DSP functions；
The capacitor that compensating electric capacity is Kvar grades；Cooling system includes temperature control device and fan；Periphery switch includes breaker, three
Mutually it is spaced apart, single-phase is spaced apart and capacitor fling-cut switch；Protection module includes lightning-protection module and overcurrent protection module；Mutual inductor module packet
Include current transformer and mutual inductor interstar connection row；Wireless module is LORA modules, is responsible for wireless data transmission；
Master controller penetrates through modules, is used for the control and operation of whole equipment；Display screen is for showing every current value, electricity
Pressure value, balancing information, fault message and power factor (PF)；Temperature controller is connect by conducting wire with fan, and temperature controller passes through
RS485 transmits information to main controller；Three phase mains A, B, C access power supply by breaker, and zero curve is connected to zero-emission terminals
Son；Current transformer divides three groups of three-phase to be connected to mutual inductor interstar connection row；
Each three-phase is spaced apart the power supply Push And Release for controlling corresponding three facies patterns capacitor fling-cut switch and three-phase leveling module,
It plays a protective role when transient high-current triggers；It is each single-phase to be spaced apart for controlling corresponding unipolar type capacitor fling-cut switch；
Three-phase intelligent leveling module is connected with main controller, and information is transmitted by network interface, realizes active power compensation, it is flat to finally reach load
Weigh effect；Arrester is mounted at power import, plays the role of lightning protection to the operation of whole equipment.
2. mixed type three-phase load unbalance automatic regulating apparatus according to claim 1, which is characterized in that
Three-phase intelligent leveling module uses voltage type PWM wave convertor circuit structure, and IGBT power conversion modules circuits are using three electricity
Flat topological structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810357955.0A CN108493964A (en) | 2018-04-20 | 2018-04-20 | Mixed type three-phase load unbalance automatic regulating apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810357955.0A CN108493964A (en) | 2018-04-20 | 2018-04-20 | Mixed type three-phase load unbalance automatic regulating apparatus |
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| Publication Number | Publication Date |
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| CN108493964A true CN108493964A (en) | 2018-09-04 |
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| CN201810357955.0A Pending CN108493964A (en) | 2018-04-20 | 2018-04-20 | Mixed type three-phase load unbalance automatic regulating apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687585A (en) * | 2018-12-28 | 2019-04-26 | 中国电力科学研究院有限公司 | A kind of multifunctional low-voltage load monitoring and control integrated apparatus |
| CN109980661A (en) * | 2019-03-07 | 2019-07-05 | 武汉武新电气科技股份有限公司 | A kind of load unbalanced automatic regulating system of three-phase comprehensive of bimodulus communication |
| CN110994650A (en) * | 2019-12-27 | 2020-04-10 | 吉林建筑科技学院 | Three-phase load unbalance intelligent balance adjusting method for electric heating |
| CN114034923A (en) * | 2021-10-29 | 2022-02-11 | 无锡皓凯利科技有限公司 | Automatic measurement winding broken string and three-phase active power synchrophasor precision leveling system |
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| CN205038272U (en) * | 2015-08-31 | 2016-02-17 | 贵州电网有限责任公司贵阳供电局 | Electric energy quality monitoring and controlling system |
| WO2016112986A1 (en) * | 2015-01-15 | 2016-07-21 | Siemens Aktiengesellschaft | Arrangement comprising at least one series circuit and method for operating the same |
| CN206585325U (en) * | 2017-03-01 | 2017-10-24 | 山东科技大学 | A kind of two CSTR Active Power Filter-APF compensated applied to harmonic wave and m-Acetyl chlorophosphonazo |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104377709A (en) * | 2014-11-04 | 2015-02-25 | 国家电网公司 | Energy-saving control cabinet and calculating method of reactive compensation electricity saving amount of energy-saving control cabinet |
| WO2016112986A1 (en) * | 2015-01-15 | 2016-07-21 | Siemens Aktiengesellschaft | Arrangement comprising at least one series circuit and method for operating the same |
| CN205038272U (en) * | 2015-08-31 | 2016-02-17 | 贵州电网有限责任公司贵阳供电局 | Electric energy quality monitoring and controlling system |
| CN206585325U (en) * | 2017-03-01 | 2017-10-24 | 山东科技大学 | A kind of two CSTR Active Power Filter-APF compensated applied to harmonic wave and m-Acetyl chlorophosphonazo |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687585A (en) * | 2018-12-28 | 2019-04-26 | 中国电力科学研究院有限公司 | A kind of multifunctional low-voltage load monitoring and control integrated apparatus |
| CN109980661A (en) * | 2019-03-07 | 2019-07-05 | 武汉武新电气科技股份有限公司 | A kind of load unbalanced automatic regulating system of three-phase comprehensive of bimodulus communication |
| CN109980661B (en) * | 2019-03-07 | 2023-01-17 | 武汉武新电气科技股份有限公司 | Three-phase comprehensive unbalanced load automatic regulating system of bimodulus communication |
| CN110994650A (en) * | 2019-12-27 | 2020-04-10 | 吉林建筑科技学院 | Three-phase load unbalance intelligent balance adjusting method for electric heating |
| CN114034923A (en) * | 2021-10-29 | 2022-02-11 | 无锡皓凯利科技有限公司 | Automatic measurement winding broken string and three-phase active power synchrophasor precision leveling system |
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Application publication date: 20180904 |