CN107240919A - Intelligent active filter - Google Patents
Intelligent active filter Download PDFInfo
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- CN107240919A CN107240919A CN201710476954.3A CN201710476954A CN107240919A CN 107240919 A CN107240919 A CN 107240919A CN 201710476954 A CN201710476954 A CN 201710476954A CN 107240919 A CN107240919 A CN 107240919A
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in 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
- Y02E40/20—Active power filtering [APF]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention provides a kind of intelligent active filter; including grid-connected inductive transformer, power network detection means, A/D converters, harmonic wave/active transform controller, var phase shifter, harmonic reactive compensating apparatus, system protection controller, load detection device, DSP processing controllers.Harmonious wave power is transformed to active power by DSP processing controllers control harmonic wave/active transform controller, utilize var phase shifter, electric network reactive-load electric power phase shift is converted to active power, by active power loopback power network of the grid-connected inductive transformer conversion, substantial amounts of electric power electric energy is saved；DSP processing controllers control harmonic reactive-load compensation control device, high-speed, high precision is carried out to mains by harmonics and var to compensate, energy-saving and emission-reduction, eliminate power network interference and impact, power network and the stability and security of produce load system are improved, power grid quality is improved.The present invention can be widely suitable for national grid, electric car railway, metal smelt system, Chang Deng high energy-consuming enterprises of chemical oil refining.
Description
Technical field
The present invention relates to the wave filter of power electronics control technology field, specifically, a kind of power network and electricity are referred to
Force system intelligent compensation and the intelligent active filter of energy saver.
Background technology
With the development of world energy sources crisis, it is the important proposition of World Science to invent the new energy, while saving existing energy
Source is the current important research topic of scientific circles.Because invention new energy needs time, and it is current generation to save the existing energy
Boundary's task of top priority.Current electric car is that world's power consumption is maximum most heavy with environmental pollution with metal smelt, produces substantial amounts of high order
Harmonic wave causes greatly interference and harm to power network with var；Greatly impact and fluctuation, serious shadow are caused to power network
Ring the security and power supply quality of power network.
At present, it is at most LC wave filters and SVG and SVC that electric car railway is used with smelting iron and steel system, and compensation precision is low,
Be easy to produce resonance, and volume is big, compensation precision is low, power consumption is big, power system can not be met the need for.
Through the literature search discovery to prior art, Application No. 201220183143, the patent discloses a kind of electric power
Active filter, it includes：According to the analysis result of actual measurement load current waveform, control compensation circuit is anti-to harmonic current component
To compensation, by IGBT inverters, reverse current is injected in electric power system；Realization filters out harmonic wave function.But which is compensated
Precision is low, resistance to force down, and capacity is small, poor reliability.
It also found in retrieval, the utility model patent of Application No. 201020254744, propose a kind of mixed active filter
Ripple device.The wave filter include primary system part and electrical secondary system part, the primary system part include series connection it is active with
Passive filter, but the fundamental voltage of power network AC power can not be born, installed capacity is small, it is impossible to be applicable high voltage large capcity electricity
Force system.
The Chinese patent CN201310492608.6 of the applicant's application, discloses a kind of active Electric Network Higher Harmonic and nothing
Work(electric power compensation energy saver, is carried out mainly for the higher hamonic wave produced by the universal load common feature of power network and var
Mains by harmonics and var energy-saving compensating device.
The content of the invention
For defect of the prior art, the present invention is improved on the basis of existing technology to be had there is provided a kind of intelligence
The high-speed, high precision intelligent control of source filter, integrated communications system, electronic control system, power network and power system, in reply
Various control mode selections have the intelligent resolution ability of height with troubleshooting way choice, and calculate processing speed improving
Degree and function, increase the Intelligent treatment computing module of multiple special functions, to improve the intelligent resolution ability of DSP processing controllers
With speed, intelligent active filter performance and the height adaptability to work condition environment are improved.
To achieve the above object, intelligent active filter of the present invention, including：Grid-connected intelligent inductive transformer, power network
Detection means, A/D converters, harmonic wave/active transform controller, var phase shifter, harmonic reactive compensating apparatus, system are protected
Protect converter, load detection device, DSP processing controllers；Wherein：
Power network detection means, for detecting power network, the voltage x current of supply transformer and running status, and by power network high pressure
Voltage to current transducer is input to A/D converters into low-voltage analog signal；
Load detection device, for the voltage x current and condition monitoring of detection load production system, and will load height
Piezoelectricity current voltage is converted into low-voltage analog signal, is input to A/D converters；
A/D converters, the low-voltage analog signal of power network detection means, the power network of load detection device and load is transformed to
Data signal, is input to DSP processing controllers；
DSP processing controllers, are monitored to power network signal with system running state, according to the power network of above-mentioned detection and negative
The signal of load, calculates each harmonic and var frequency, phase and amplitude, and harmonic wave/active transform controller, idle
Electric power phase shifter, harmonic reactive compensating apparatus, the control instruction of system protection controller：
DSP processing controllers control harmonic wave/active transform controller to be by mains by harmonics electrical power conversion by control instruction
Active power, by grid-connected inductive transformer by active power loopback power network or supply transformer, saves substantial amounts of electric power electric energy；
DSP processing controllers control the var that var phase shifter produces power network with load by control instruction
Phase shift is active power, by grid-connected inductive transformer loopback power network, saves substantial amounts of electric power electric energy；
DSP processing controllers control harmonic reactive compensating apparatus to carry out high-speed, high precision benefit to mains by harmonics and var
Repay, energy-saving and emission-reduction, eliminate power network interference and impact, improve grid stability and security, improve power grid quality；
DSP processing controllers protect controller by control instruction control system, when power network or load occur abnormal, cut
The connection of net and load is powered off, power network is played and isolated and protective effect with produce load system, intelligent active filter.
Mains by harmonics and var are converted to active power loopback power network by wave filter of the present invention, are saved substantial amounts of
Electric power；Harmonic reactive-load compensation voltage is produced using high-speed dsp control harmonic reactive compensating apparatus and SPWM inverters simultaneously, to electricity
The harmonic wave that net is produced with produce load system carries out high-speed, high precision compensation with var, eliminates power system interference and ripple
It is dynamic, power grid quality is improved, the stability and security of power system and smelting system is improved, imitated with huge energy-saving and emission-reduction
Really, compensation precision is high, improves power network and the stability and security of produce load system.
Preferably, the DSP processing controllers are included：DSP signal processors, DSP-FFT processors, DSP control instructions
Arithmetic unit and dsp system protection ordering calculation device, wherein：
DSP signal processors are used for system monitoring, detection, and display and Control on Communication；
DSP-FFT processors, calculate power network and produce load system voltage electric current and each harmonic and var
Amplitude and phase；
DSP control instructions arithmetic unit is used for harmonic wave/active transform controller, var phase shifter, harmonic reactive-load compensation
The control instruction parameter of device and system protection controller is calculated；DSP control instructions arithmetic unit controls grid-connected inductive transformer, will
The offset voltage feeding power network that active power, the harmonic reactive compensating apparatus of harmonic wave/active transform controller generation are produced；
Dsp system protects ordering calculation device, and power network and power supply transformation are detected according to power network detection means and A/D converters
The running status of device and voltage x current data, dsp system protection ordering calculation device, according to the driving structure of system protection controller
Feature and operational procedure, according to system occur overvoltage, overcurrent, overtemperature degree tolerance value, calculate system protection control
The control instruction of device.
It is highly preferred that the DSP-FFT processors, calculate each harmonic of power network and produce load system voltage electric current
With the frequency, amplitude and phase of var, harmonic reactive compensating apparatus is calculated by DSP control instruction arithmetic units with this data
With the control instruction parameter of system protection controller, mains by harmonics is transformed to active electricity by control harmonic wave/active transform controller
Power loopback power network.
It is highly preferred that the DSP control instructions arithmetic unit, according to DSP-FFT processors, calculates power network and produce load
The each harmonic of system voltage electric current and the frequency of var, amplitude and phase；With reference to the characteristic of harmonic reactive compensating apparatus
Harmonic reactive compensating apparatus control parameter and instruction are calculated, harmonic compensation voltage is produced.
It is highly preferred that the dsp system protection ordering calculation device：When there is overvoltage in system, overcurrent, excess temperature etc. therefore
During barrier, the control instruction parameter of system protection controller, dsp system protects ordering calculation device according to troubleshooting guidelines system
Blanket insurance protects controller, or allotment configuration of load, or cut-out load disconnecting switch, and carries out alarm simultaneously with utilizing communication alert dress
Put notice relevant departments.
Preferably, the grid-connected inductive transformer includes disconnecting switch, controllable impedance winding, inductance controling winding, electric energy
Loopback winding, high-voltage capacitance C1, resonance reactive-load compensation winding and the grid-connected winding of transformation, wherein：Disconnecting switch is used for will be whole
Intelligent active filter is connected to the grid or cut off power network；Inductance controling winding is controlled by harmonic reactive compensating apparatus, inductance
The inductance value of controling winding regulation control controllable impedance winding, makes controllable impedance winding inductance value be connected and composed with high-voltage capacitance C1
LC resonance circuits, each harmonic all flows into harmonic wave/active transform controller, the control harmonic wave/active conversion of DSP processing controllers
Controller is converted to mains by harmonics the active power with power network same frequency same-phase, grid-connected via electric energy loopback winding and transformation
Winding is changed into active power loopback power network；Harmonic reactive compensating apparatus output harmonic compensation voltage send resonance reactive-load compensation around
Group, after being filtered through resonance reactive-load compensation winding, power network is sent into after the grid-connected winding boosting of transformation.
Preferably, the DSP processing controllers are negative with production to power network by power network detection means and load detection device
G system is detected with monitoring in real time, when abnormal and failure occurs in power network, DSP processing controllers control system protection controller,
Cut off grid-connected inductive transformer and load system disconnecting switch；When a failure occurs it, DSP processing controllers control system protection control
Device processed cuts off grid-connected inductive transformer, intelligent active filter of the invention is cut off power network；When produce load system jam
When, DSP processing controllers control system protection converter driving production load system high voltage isolator, by produce load system
Power network is cut off, while sending alarm signal or control signal by communication alert device.
Compared with prior art, the invention has the advantages that：
The present invention is directed to produced by national grid, electric car railway, the instantaneous dramatic performance of metal smelt system such as iron aluminum
Higher hamonic wave and var, power converter is controlled using high-speed dsp processing controller, the conversion of harmonic wave and var
For active power loopback power network, power factor is improved, with huge energy-saving effect, while to power system residue harmonics and nothing
Work(electric power carry out high-speed, high precision compensation, eliminate power network interference with fluctuation, energy-saving and emission-reduction, improve power grid quality, improve power network with
The stability and security of produce load system, improve product quality, reduce production cost, with great economic benefit and society
Benefit.
Brief description of the drawings
By reading the detailed description made with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the system architecture diagram of one embodiment of the invention；
Fig. 2 is the grid-connected inductive transformer structure chart of one embodiment of the invention；
Fig. 3 is the systematic functional structrue figure of one embodiment of the invention；
Fig. 4 is harmonic wave/active transform controller structured flowchart；
Fig. 5 is the structure principle chart of DSP processing controllers；
In figure：1 is supply transformer, and 2 be grid-connected inductive transformer, and 3 be power network detection means, and 4 be A/D converters, and 5 are
Harmonic wave/active transform controller, 6 be var phase shifter, and 7 be harmonic reactive compensating apparatus, and 8 be system protection controller, 9
It is DSP processing controllers for load detection device, 10,11 be communication alert device；
2-0 is disconnecting switch, and 2-1 is controllable impedance winding, and 2-2 is inductance controling winding, and 2-3 is electric energy loopback winding,
2-4 is harmonic reactive-load compensation winding, and 2-5 is the grid-connected winding of transformation, and C1 is high-voltage capacitance, and 5-1 is adjustment of inductance controller, 5-2
It is var phase shifter for pwm converter, 6,7 be harmonic reactive compensating apparatus；10-1 is DSP signal processors, and 10-2 is
DSP-FFT processors, 10-3 is DSP control instruction arithmetic units, and 10-4 is that dsp system protects ordering calculation device.
Embodiment
With reference to specific embodiment, the present invention will be described.Following examples will be helpful to those skilled in the art
The present invention is further understood, but the invention is not limited in any way.It should be pointed out that to one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the guarantor of the present invention
Protect scope.
The present invention provides a kind of intelligent active filter, to the humorous of the systems such as power network and electric car railway and metal smelt generation
Ripple is transformed to active power loopback power network with var, saves substantial amounts of electric power, while being carried out for harmonic wave with var
High-speed, high precision is compensated, and eliminates power network interference and fluctuation, improves grid stability and security, and energy-saving and emission-reduction improve power network matter
Amount, saves substantial amounts of electric energy, and reduction transformer is lost with increasing service life with electrical equipment.
As shown in figure 1, be the structured flowchart of intelligent active filter in one embodiment of the invention, including：Grid-connected inductance becomes
Depressor 2, power network detection means 3, A/D converters 4, harmonic wave/active transform controller 5, var phase shifter 6, harmonic wave is idle
Compensation device 7, system protection controller 8, load detection device 9, DSP processing controllers 10；Wherein：
Power network detection means 3, voltage x current and operation of power networks state for detecting power network and supply transformer 1, electricity
Net Voltage to current transducer is input to A/D converters 4 into low-voltage analog signal, is transformed to data signal and send DSP processing controllers 10；
Load detection device 9, voltage x current and running status for detection load production system (load in Fig. 1) are examined
Survey, and load voltage electric current is converted into low-voltage analog signal, be input to A/D converters 4；
A/D converters 4, power network detection means 3, the power network of load detection device 9 and load voltage current signal are converted
For data signal, DSP processing controllers 10 are input to；
The control function of DSP processing controllers 10 is with structure as shown in figure 3, wherein pwm converter 5-2 is harmonic wave/active change
A part for changer controller, analysis is monitored to power network and load signal and running status, according to the power network of above-mentioned detection with
The signal of load, calculates frequency, phase and the amplitude of each harmonic and var, and harmonic wave/active transform controller
5th, var phase shifter 6, harmonic reactive compensating apparatus 7, the control instruction of system protection controller 8, control grid-connected inductance to become
Controllable impedance winding 2-1 always works in optimum resonant state in depressor 2, the grid-connected inductive transformer 2 of regulation control, make each time it is humorous
Ripple absorbing circuit impedance is zero, power network is all flowed into the whole of harmonic wave/active transform controller 5 with harmonic wave produced by produce load
Flow device.
As shown in figure 4, DSP processing controllers 10 control harmonic wave/active transform controller 5 to become with PWM by control instruction
Mains by harmonics electrical power conversion is active power by parallel operation 5-2, by grid-connected inductive transformer 2 by active power loopback power network or power supply
Transformer 1, saves substantial amounts of electric power electric energy；
DSP processing controllers 10 by control instruction control var phase shifter 6 by power network and load produce it is idle
Electric power phase shift is active power, by the grid-connected loopback power network of inductive transformer 2, saves substantial amounts of electric power electric energy；
DSP processing controllers 10 control harmonic reactive compensating apparatus 7 to mains by harmonics and var by control instruction
High-speed, high precision compensation is carried out, energy-saving and emission-reduction eliminate power network interference and impact, improve grid stability and security, improve electricity
Net quality；
DSP processing controllers 10 protect controller 8 by control instruction control system, occur in power network or load abnormal
When, the connection of cut-out power network and load.
Further, in some embodiments, present system also sets up communication alert device 11, for system monitoring and
Information communication and alarm with relevant departments.
In embodiment, the functional structures of the DSP processing controllers 10 as shown in figure 5, comprising：DSP signal processors
10-1, DSP-FFT processor 10-2, DSP control instruction arithmetic unit 10-3 and DSP-SP system protection ordering calculation device 10-4, its
In：
DSP signal processors 10-1 is monitored analysis and display, monitoring system to power network and load system running status
The detection of signal, data processing and system operation；
DSP-FFT processor 10-2, calculate power network and produce load system voltage electric current and each harmonic and idle electricity
Frequency, amplitude and the phase of power；
The control instruction that DSP control instruction arithmetic units 10-3 calculates each compensating controller and system protection controller 8 is joined
Number；Electric Network Higher Harmonic is transformed to active power loopback power network by control harmonic wave/active transform controller 5；
Dsp system protects ordering calculation device 10-4, and power network and confession are detected according to power network detection means 3 and A/D converters 4
The running status of piezoelectric transformer 1 and voltage x current data, dsp system protection ordering calculation device 10-4, according to system protection control
The driving structure feature and operational procedure of device 8, according to system occur overvoltage, overcurrent, overtemperature degree tolerance value, calculate
The control instruction of system protection controller 8, the purpose is to occurring electricity when power network, production system or intelligent active filter
Pressure, overcurrent, overtemperature degree or when waiting accident, dsp system protect ordering calculation device 10-4 to carry out discriminating classification to accident, and according to
Code sends control instruction to system protection controller 8, drives high voltage isolator, or regulation load matching, or cut-out power network
Power network and transformer are cut off with the connection of load, or an intelligent active filter, while Alarm Communication device is alarmed and led to
Know relevant departments.
Specifically, DSP control instruction arithmetic units 10-3 be used for harmonic wave/active transform controller 5, var phase shifter 6,
The control instruction parameter of harmonic reactive compensating apparatus 7 and system protection controller 8 is calculated；DSP control instruction arithmetic units 10-3 is controlled
Grid-connected inductive transformer 2 is made, is transformed to harmonic wave/mains by harmonics of active transform controller 5 by grid-connected inductive transformer 2 active
Electric power, the offset voltage that harmonic reactive compensating apparatus 7 is produced sends into power network；
Specifically, DSP control instruction arithmetic unit 10-3, calculate power network negative with production according to DSP-FFT processors 10-2
The each harmonic of G system voltage x current and the amplitude of var and phase, with reference to the characteristic meter of harmonic reactive compensating apparatus 7
The control parameter of harmonic reactive compensating apparatus 7 and instruction are calculated, each harmonic offset voltage is produced, by grid-connected inductive transformer 2 times
Pushing electric network.
The present invention is monitored to Power Network Digital signal by DSP signal processors 10 with power network with load system running status
Analysis and display, power network and produce load system voltage electric current and each harmonic and nothing are calculated by DSP-FFT processors 10-1
The frequency amplitude and phase of work(electric power, calculate the parameter and control instruction of each compensating controller, are transported by DSP-SP control instructions
Calculate the control instruction parameter that device 10-3 calculates system protection controller 8.
As a preferred embodiment, as shown in Fig. 2 the grid-connected inductive transformer 2, including disconnecting switch 2-0, height
Press resonance controllable impedance winding 2-1, inductance controling winding 2-2, high-voltage capacitance C1, electric energy loopback inductor winding 2-3, resonance is idle
Compensative winding 2-4 and transformation winding 2-5；As shown in figure 4, the composition of harmonic wave/active transform controller 5, wherein adjustment of inductance
Controller 5-1, pwm converter 5-2 are the building block of harmonic wave/active transform controller 5；
Power Network Digital signal is input to DSP signal processor 10-1, calculates each harmonic and var frequency, amplitude
With phase, the control instruction of each controller is calculated；Inductance controling winding 2-2 is controlled by DSP processing controllers 10, by inductance control
Controllable impedance winding 2-1 each inductance parameters are adjusted winding 2-2 processed, make controllable impedance winding 2-1 and high-voltage capacitance
C1 connects and composes LC resonance circuits, so that the controllable impedance winding 2-1 of grid-connected inductive transformer 2 each resonant inductance L begins
Optimal high pressure resonant condition is operated in eventually, the impedance for making each harmonic branch road is zero, make power network and harmonic wave produced by produce load
Harmonic wave/active transform controller 5 is all flowed into, is active power Electric Network Higher Harmonic electrical power conversion, by grid-connected inductance transformation
The grid-connected winding 2-5 loopback power networks of transformation of device 2, save substantial amounts of electric power electric energy.The harmonic wave that harmonic reactive compensating apparatus 7 is exported is mended
Repay voltage and send resonance reactive-load compensation winding 2-4, after being filtered through resonance reactive-load compensation winding 2-4 and by the grid-connected winding 2-5 liters of transformation
Power network is sent into after pressure.
The specific works of grid-connected inductive transformer 2 include：
1. whole intelligent active filter is connected to the grid or cut off power network by disconnecting switch 2-0；
2. high voltage induction winding 2-1 and high-voltage capacitor C1 connects and composes LC resonance circuits, make resonance circuit to harmonic wave
Impedance is zero, harmonic wave is all flowed into harmonic wave/active transform controller 5 and is converted to active power；
3. adjusting control controllable impedance winding 2-1 inductance value by inductance controling winding 2-2, make controllable impedance winding 2-1
Resonant condition is always worked in the high-voltage capacitance C1 LC resonance circuits constituted.
4. active power is converted to by harmonic wave/active transform controller 5, it is grid-connected via electric energy loopback winding 2-3 and transformation
Winding 2-5 is changed into high pressure active power loopback power network.
5. the offset voltage that harmonic reactive compensating apparatus 7 is produced, send transformation grid-connected winding by resonance reactive-load compensation winding 2-4
2-5 sends into power network.
The disconnecting switch 2-0, is controlled by DSP processing controllers 10, in power network and load system or intelligent active power filtering
It is instantaneous to disconnect high voltage isolator 2-0 when device occurs abnormal, cut off power network and load production system or the active filter of present invention intelligence
Ripple device, plays insulation blocking effect.
In one embodiment, the power network detection means 3 includes electric network voltage detection device 3-1 and current transformation sensor
Line voltage electric current running state conversion, is inputted A/D converters 4 by 3-2 into low-voltage analog signal respectively, by 4 turns of A/D converters
Change data signal input DSP processing controllers 10 into.
When power network or load production system or compensation system there is overvoltage, overcurrent, too high gentle overload when etc. therefore
During barrier, controller 8 is protected by the control system of DSP processing controllers 10, advised according to power network and the requirement of load production system with operation
Then, Load adjustment and the configuration that lightens the load, while sending alarm signal from communication alert device 11 to relevant departments and device.
As shown in figure 3, in the above-mentioned system of the present invention, system inspection is constituted by power network detection means 3 and load detection device 9
Survey device, when there is short circuit, overvoltage, overcurrent or failure in power network or load, controlled by DSP processing controllers 10 be
Intelligent active filter, is cut off power network by the blanket insurance shield control driving disconnecting switch 2-0 of controller 8；Equally when intelligent active power filtering
When device breaks down, the disconnecting switch 2-0 of grid-connected inductive transformer 2 is driven by system protection controller 8, intelligent active power filtering
Device cuts off power network immediately, while sending alarm signal from communication alert device 11 to relevant departments and device, it is to avoid power network and intelligence
Energy active filter influences each other.Intelligent active filter is when failture evacuation or overvoltage overcurrent recovery normal range (NR), DSP
Processing controller 10 can control system protection controller 8 and reply condition and code according to power network, and driving disconnecting switch 2-0 closes a floodgate,
Intelligent active filter auto-parallel is run, can also recover disconnecting switch 2-0 combined floodgates manually and be incorporated into the power networks.
The present invention utilizes network resonance control principle and Intelligent Control Theory, proposes a kind of intelligent active filter, can be with
Applied to electric car railway, smelting iron and steel, the metal smelt field of electrolytic aluminium and aluminum oxide etc..The present invention is produced for special operation condition
Raw surge voltage is suppressed with dash current, to the higher hamonic wave and var produced by power network and metal smelt system
High-accuracy compensation is carried out, and higher hamonic wave electric power and var are converted into active power loopback power network, it is effective to suppress electricity
Force system surge voltage and impact of the electric current to power system, improve the dielectric strength and power equipment service life of transformer,
Increase the stability and security of power network, improve power grid quality, substantial amounts of electric power and electric energy are saved in energy-saving and emission-reduction.
System architecture of the invention is reasonable, runnability is stable, and compensation precision is high, and speed is fast, and energy-saving efficiency is high, exports electricity
Press high power big, can be used for below 220KV all kinds of power networks and all kinds of metal smelt systems, be easy to assembling to safeguard, so that gram
Deficiency of the prior art has been taken, and has been had the characteristics that：
1. the present invention using DSP processing controllers 10 control DSP-FFT processors 10-2 controls calculate each harmonic with
Var frequency amplitude and phase, calculate the control instruction of each controller；
2. the present invention controls harmonic wave/active transform controller 5 using DSP processing controllers 10, Electric Network Higher Harmonic electricity
Power is converted to active power, by the grid-connected loopback power network of inductive transformer 2, saves substantial amounts of electric power electric energy；
3. control var phase shifter 6 to be active power the phase shift of electric network reactive-load electric power using DSP processing controllers 10,
By the grid-connected loopback power network of inductive transformer 2, substantial amounts of electric power electric energy is saved；
4. controlling harmonic reactive compensating apparatus 7 using DSP processing controllers 10 simultaneously, mains by harmonics var is carried out
High-speed, high precision is compensated, and is eliminated power network interference and impact, is improved grid stability and security, improves power grid quality.Energy-conservation subtracts
Row, saves a large amount of electric power electric energy, with great economic benefit and social benefit.
5. power network and load system are detected and accident analysis using DSP processing controllers 10 simultaneously.Control driving
System protection controller 8, the failures such as overvoltage, overcurrent, overload, short circuit thunderbolt are loaded to power network and production system and carry out wink
When cut off and protect, or according to overload adjust code, system loading is adjusted with matching.
6. it is of the invention with existing various compensation devices compared with wave filter：Existing various LC wave filters are with SVC and SVG to electricity
Net impact is big, it is easy to produce resonance, explosive fragile, the big power consumption of volume is big.
Dynamic characteristic of the present invention is good, and compensation precision is high, saves a large amount of electric power electric energy, improves the stability and peace of power system
Quan Xing.In same compensation capacity, volume is only LC wave filters and SVC and SVG volumes 1/5th.
7. the present invention is adapted to electric car railway, various iron aluminum metal smelt systems, machining and dynamical system, wind-force
Generating field, oil plant, power plant and national grid, with vast potential for future development.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
The substantive content of the present invention is rung, and within its protection domain.
Claims (7)
1. a kind of intelligent active filter, it is characterised in that：Including：Grid-connected inductive transformer (2), power network detection means (3), A/
D converters (4), harmonic wave/active transform controller (5), var phase shifter (6), harmonic reactive compensating apparatus (7), system
Protect controller (8), load detection device (9), DSP processing controllers (10)；Wherein：
Power network detection means (3), for detecting power network, the voltage x current of supply transformer (1) and running status, and power network is high
Piezoelectricity current voltage is converted into low-voltage analog signal, is input to A/D converters (4)；
Load detection device (9), for the voltage x current and condition monitoring of detection load production system, and will load high pressure
Voltage to current transducer is input to A/D converters (4) into low-voltage analog signal；
A/D converters (4), by the low-voltage analog signal of the power network and load of power network detection means (3) and load detection device (9)
Data signal is transformed to, DSP processing controllers (10) are input to；
DSP processing controllers (10), are monitored to power network signal with system running state, according to the power network of above-mentioned detection and negative
The signal of load, calculates each harmonic and var frequency, phase and amplitude, and harmonic wave/active transform controller (5),
Var phase shifter (6), harmonic reactive compensating apparatus (7), the control instruction of system protection controller (8), and：
DSP processing controllers (10) control harmonic wave/active transform controller (5) by mains by harmonics electrical power conversion by control instruction
For active power, by grid-connected inductive transformer (2) by active power loopback power network or supply transformer (1), substantial amounts of electricity is saved
Power electric energy；
DSP processing controllers (10) control var phase shifter (6) by power network by control instruction and load the idle of generation
Electric power phase shift is active power, by simultaneously energy inductive transformer (2) loopback power network, saves substantial amounts of electric power electric energy；
DSP processing controllers (10) are by instructing control harmonic reactive compensating apparatus (7) to carry out mains by harmonics and var
High-speed, high precision is compensated, energy-saving and emission-reduction, is eliminated power network interference and impact, is improved grid stability and security, improves power network matter
Amount；
DSP processing controllers (10) protect controller (8) by control instruction control system, when occurring abnormal, cut off power network
With the connection of load or intelligent active filter.
2. intelligent active filter according to claim 1, it is characterised in that：The DSP processing controllers (10) include：
DSP signal processors (10-1), DSP-FFT processors (10-2), DSP control instructions arithmetic unit (10-3) and dsp system protection
Ordering calculation device (10-4), wherein：
DSP signal processors (1-1) are used for system monitoring, detection, and display and Control on Communication；
DSP-FFT processors (10-2), calculate power network and produce load system voltage electric current and each harmonic and var
Amplitude and phase；
DSP control instructions arithmetic unit (10-3) is used for harmonic wave/active transform controller (5), var phase shifter (6), harmonic wave
The control instruction parameter of reactive power compensator (7) and system protection controller (8) is calculated；DSP control instructions arithmetic unit (10-3)
Grid-connected inductive transformer (2) is controlled, active power, the harmonic reactive compensating apparatus that harmonic wave/active transform controller (5) is produced
(7) the offset voltage feeding power network produced；
Dsp system protection ordering calculation device (10-4), according to power network detection means (3) and A/D converters (4) detect power network and
The running status of supply transformer (1) and voltage x current data, dsp system protection ordering calculation device (10-4) are protected according to system
The driving structure feature and operational procedure of controller (8) are protected, overvoltage, overcurrent, the tolerance limit of overtemperature degree are being occurred according to system
Value, calculates the control instruction of system protection controller (8).
3. intelligent active filter according to claim 1, it is characterised in that：The power network detection means (3) includes electricity
Net voltage check device (3-1) and current transformation sensor (3-2), respectively by line voltage electric current running state conversion into low pressure
Analog signal input A/D converters (4), and data signal input DSP processing controllers (10) are converted into by A/D converters (4).
4. intelligent active filter according to claim 2, it is characterised in that：The DSP processing controllers (10), by
DSP-FFT processors (10-2) calculate each higher hamonic wave and var of power network and production system load voltage and electric current
Frequency plot and amplitude, control var phase shifter (6), the var that power network and produce load system are produced, move
It is mutually the active power with power network same-phase, via grid-connected inductive transformer (2) loopback power network.
5. intelligent active filter according to claim 2, it is characterised in that：The DSP processing controllers (10), by
DSP-FFT processors (10-2) calculate each higher hamonic wave and idle frequency of power network and produce load system voltage and electric current
Rate phase and amplitude, the harmonic compensation voltage that control harmonic reactive compensating apparatus (7) is produced and reactive-load compensation electric power, via grid-connected
Inductive transformer (2) loopback power network, is compensated for grid residual harmonic wave with remaining var.
6. the intelligent active filter according to claim any one of 1-5, it is characterised in that：The grid-connected inductive transformer
(2) disconnecting switch (2-0), controllable impedance winding (2-1), inductance controling winding (2-2), electric energy loopback winding (2-3), height are included
Voltage capacitance C1, resonance reactive-load compensation winding (2-4) and the grid-connected winding of transformation (2-5), wherein：Disconnecting switch (2-0) is used for will
Whole intelligence active filter is connected to the grid or cut off power network；Inductance controling winding (2-2) is entered by harmonic reactive compensating apparatus (7)
Row control, the inductance value of inductance controling winding (2-2) regulation control controllable impedance winding (2-1) makes controllable impedance winding (2-1)
Inductance value connects and composes LC resonance circuits with high-voltage capacitance C1, and each harmonic all flows into harmonic wave/active transform controller (5),
DSP processing controllers (10) control harmonic wave/active transform controller (5) is converted to mains by harmonics and power network same frequency same-phase
Active power, be changed into active power loopback power network via electric energy loopback winding (2-3) and the grid-connected winding of transformation (2-5)；Harmonic wave
The harmonic compensation voltage of reactive power compensator (7) output send resonance reactive-load compensation winding (2-4), through resonance reactive-load compensation winding
After (2-4) filtering, power network is sent into after the grid-connected winding of transformation (2-5) boosting.
7. the intelligent active filter according to claim any one of 1-5, it is characterised in that：The DSP processing controllers
(10) power network and produce load system are detected and monitoring in real time by power network detection means (3) and load detection device (9), when
When abnormal and failure occurs in power network, DSP processing controllers (10) control system protection controller (8) cuts off grid-connected inductance transformation
Device (2) and load system disconnecting switch；When a failure occurs it, DSP processing controllers (10) control system protection controller (8) is cut
Except grid-connected inductive transformer (2), the intelligent active filter is set to cut off power network；When produce load system jam, DSP
Processing controller (10) control system protection converter (8) driving production load system high voltage isolator, by produce load system
System cuts off power network, while sending alarm signal or control signal by communication alert device (11).
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| CN201710476954.3A CN107240919A (en) | 2017-06-21 | 2017-06-21 | Intelligent active filter |
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| CN107872048A (en) * | 2017-11-09 | 2018-04-03 | 上海广吉电气有限公司 | High pressure double breaking points intelligent switch |
| CN108539855A (en) * | 2018-04-13 | 2018-09-14 | 上海广吉电气有限公司 | High-speed dsp controls power grid intellectual monitoring regulating compensation and Protection control system |
| CN109728569A (en) * | 2018-12-20 | 2019-05-07 | 上海广吉电气有限公司 | Rotator type intelligent high-pressure switch |
| CN111555301A (en) * | 2020-05-26 | 2020-08-18 | 上海广吉电气有限公司 | Intelligent active filter and reactive power phase shifter |
| CN112713596A (en) * | 2020-12-16 | 2021-04-27 | 上海希形科技有限公司 | High-voltage side reactive and harmonic low-voltage side transformer adding compensation system and method |
| CN117691600A (en) * | 2024-02-01 | 2024-03-12 | 北京特克曼电气科技有限公司 | Harmonic voltage management device, control method, system, equipment and medium |
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| CN107872048A (en) * | 2017-11-09 | 2018-04-03 | 上海广吉电气有限公司 | High pressure double breaking points intelligent switch |
| CN108539855A (en) * | 2018-04-13 | 2018-09-14 | 上海广吉电气有限公司 | High-speed dsp controls power grid intellectual monitoring regulating compensation and Protection control system |
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| CN112713596A (en) * | 2020-12-16 | 2021-04-27 | 上海希形科技有限公司 | High-voltage side reactive and harmonic low-voltage side transformer adding compensation system and method |
| CN112713596B (en) * | 2020-12-16 | 2023-10-24 | 上海希形科技有限公司 | Low-voltage side transformer compensation system and method for reactive power and harmonic waves of high-voltage side |
| CN117691600A (en) * | 2024-02-01 | 2024-03-12 | 北京特克曼电气科技有限公司 | Harmonic voltage management device, control method, system, equipment and medium |
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Application publication date: 20171010 |