CN107546741A - A kind of low-voltage network power quality controlling device general purpose controller - Google Patents
A kind of low-voltage network power quality controlling device general purpose controller Download PDFInfo
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- CN107546741A CN107546741A CN201710779820.9A CN201710779820A CN107546741A CN 107546741 A CN107546741 A CN 107546741A CN 201710779820 A CN201710779820 A CN 201710779820A CN 107546741 A CN107546741 A CN 107546741A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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Abstract
The invention provides a kind of low-voltage network power quality controlling device general purpose controller, including：PCB, PCB include AD sampling modules, dsp chip, quick DO modules, general DI/DO modules and high speed fibre module；Line voltage distribution and electric current in AD sampling modules detection low-voltage network power quality controlling device access point distribution line, and input dsp chip；When dsp chip judges that voltage and current exceedes the improvement threshold value pre-set, then dsp chip controls three-phase half-bridge circuit to carry out PWM work by quick DO modules or general DI/DO modules controlling switch feed motion, or dsp chip by high speed fibre module.Compared with the prior art, the controller has the advantages of applied widely, scalability is strong, compatibility is strong and compact to design, is easily installed.
Description
Technical field
The invention belongs to low-voltage distribution technical field, in particular to a kind of low-voltage network power quality controlling device leads to
Use controller.
Background technology
With the development of social and economic level, requirement of the power consumer to the quality of power supply is increasingly harsh.Thus the quality of power supply
Controlling device is largely used in low-voltage network, for improving power supply reliability, improves line power factor, stable line
Road voltage, line harmonic electric current is eliminated, administer circuit three-phase current unbalance etc..Power quality controlling device is divided according to principle
Two major classes can be divided into：The first kind is switching passive device formula device, and it includes with mechanical switch, semiconductor switch or compound opened
Close come switched capacitor, reactor or capacity reactance combination, for compensated line it is idle, filter out line harmonic, transfer it is alternate
Electric current；Second class is active compensation class device, and it is carried out active using the circuit that semiconductor switch device forms to distribution line
Compensation, reactive-load compensation, harmonic compensation, three-phase imbalance compensation can be divided into by compensation type.Due to the use of low-voltage distribution network users
Electric load complexity, determines the diversity of its power quality controlling equipment, and a sensitive users can install polytype electricity
Can quality device.But the difference of the technical merit and design philosophy due to equipment manufacturer, it frequently can lead to a variety of electric energy
The phenomenon for influencing each other, competing occurs when quality controlling device uses at the same time, causes overall regulation effect bad or even goes out
Contributed between existing device to dragging situation about mutually consuming.
The content of the invention
To overcome above-mentioned the deficiencies in the prior art, the present invention proposes that a kind of low-voltage network power quality controlling device is general
Controller.
Solution is used by realizing above-mentioned purpose：
A kind of low-voltage network power quality controlling device general purpose controller, it is theed improvement is that, including：PCB circuits
Plate；
The PCB includes AD sampling modules, dsp chip, quick DO modules, general DI/DO modules and high-speed light
Fiber module；
Line electricity in the AD sampling modules detection low-voltage network power quality controlling device access point distribution line
Pressure and electric current, and input the dsp chip；
When the dsp chip judges that the voltage and current exceedes the improvement threshold value pre-set, then DSP cores
Piece passes through the high-speed light by quick DO modules or general DI/DO modules controlling switch feed motion, or the dsp chip
Fiber module control three-phase half-bridge circuit carries out PWM work.
First optimal technical scheme provided by the invention, it is theed improvement is that, when controller control switching is passive
During device type device, then the dsp chip controlling switch feed motion；
When the controller controls active compensation class device, the dsp chip carries out PWM work.
Second optimal technical scheme provided by the invention, it is theed improvement is that, the dsp chip judge the voltage and
Electric current exceedes the improvement threshold value pre-set and included：
The dsp chip calculates the reactive current included in circuit, harmonic current and negative phase-sequence zero-sequence current, judges idle
Current effective value, harmonic current and negative phase-sequence zero-sequence current virtual value exceed the improvement threshold value pre-set.
3rd optimal technical scheme provided by the invention, it is theed improvement is that, the dsp chip passes through quick DO modules
Or general DI/DO modules controlling switch feed motion includes：
The dsp chip is closed a floodgate by quick DO modules or general DI/DO modules output switch switching signal, controlling switch
Action carries out the switching of capacitor, reactor or capacity reactance combination.
4th optimal technical scheme provided by the invention, it is theed improvement is that, the dsp chip passes through the high-speed light
Fiber module control three-phase half-bridge circuit, which carries out PWM work, to be included：
The dsp chip produces PWM modulation signal, is controlled by the high speed fibre module by semiconductor full-controlled device group
Into three-phase half-bridge circuit carry out PWM work, compensated line reactive current, harmonic current, negative-sequence current and zero-sequence current.
5th optimal technical scheme provided by the invention, it is theed improvement is that, in addition to power module, the power supply mould
Block includes：Power interface and Power convert subelement；
The power interface is introduced from outside into dc source, by the Power convert subelement dsp chip backward
With the dc source after AD sampling modules output modulation.
6th optimal technical scheme provided by the invention, it is theed improvement is that, the AD sampling modules include：Hall is adopted
Sample interface, Current Transmit Sampling Interface, voltage transformer pt Sampling Interface and signal condition/AD conversion subelement；
The Hall Sampling Interface, CT Sampling Interfaces and PT Sampling Interfaces gather the low-voltage network power quality controlling
Line voltage distribution and electric current in device access point distribution line, and by described in the signal condition/AD conversion subelement input
Dsp chip；
The signal condition/AD conversion subelement is also connected with the power module.
7th optimal technical scheme provided by the invention, it is theed improvement is that, the signal condition/AD conversion subelement
Including prime signal conditioning circuit and rear class A/D convertor circuit：
The current signal of access and PT/CT voltage signals are changed and input the rear class by the prime signal conditioning circuit
A/D convertor circuit；
The multiple signals that the rear class A/D convertor circuit inputs the signal conditioning circuit digitize, by digitized result
The dsp chip is transferred in a manner of high speed parallel communication.
8th optimal technical scheme provided by the invention, it is theed improvement is that, the quick DO modules include：Quick DO
Interface and quick DO driving subelements；
The quick DO data of the dsp chip are by the quick DO drivings subelement, then pass through the quick DO interfaces
Outwards output.
9th optimal technical scheme provided by the invention, it is theed improvement is that, the quick DO drivings subelement uses
MOSFET is as switching device so that described device is with minimum delay output switch control signal.
Tenth optimal technical scheme provided by the invention, it is theed improvement is that, the general DI/DO modules include：It is logical
With DI interfaces, DI drivings subelement, general DO interfaces and general DO driving subelements；
DI data are transferred to the dsp chip by the general DI interfaces after the DI drives subelement optocoupler；
The common DO data that the dsp chip is sent connect by the general DO driving subelements and the general DO successively
Mouth outwards output.
11st optimal technical scheme provided by the invention, it is theed improvement is that, the high speed fibre module includes：Light
Fine interface and optical fiber drive subelement；
The PWM modulation signal that the dsp chip is sent is after optical fiber driving subelement amplification, by opto-electronic conversion with light
The form of signal is transferred to bottom executive component by optical fiber interface；
Described two kinds of joints of optical fiber interface compatibility ST types and SC types.
12nd optimal technical scheme provided by the invention, it is theed improvement is that, in addition to shell, and the shell is aluminium
Alloying metal shell, power interface, Hall Sampling Interface, CT Sampling Interfaces, PT Sampling Interfaces, quick DO interfaces, general DI connect
Mouth, general DO interfaces, communication interface and optical fiber interface are distributed in the shell surrounding.
13rd optimal technical scheme provided by the invention, it is theed improvement is that, multiple controllers are divided into main frame
And slave, the dsp chip of the slave is by the voltage collected, electric current and switching value information transfer to main frame；
The dsp chip of the main frame collects and handled the voltage, electric current and switching value information, and switch motion is instructed
Slave is handed down to PWM instruction to perform.
14th optimal technical scheme provided by the invention, it is theed improvement is that, in addition to serial communication module；
The serial communication module includes：Communication interface and serial communication driving subelement；
The communication interface is used to drive subelement from the dsp chip receiving voltage, electric current by the serial communication
With switching value information, main frame is then sent to；And the switch motion instruction and PWM that Receiving Host is sent are instructed and passed through
The serial communication driving subelement is transferred to the dsp chip；
Or receive voltage, electric current and switching value information that slave is sent and drive subelement to transmit by the serial communication
To the dsp chip；And by the serial communication drive subelement from the dsp chip receive switch motion instruction and
PWM instructs, and is then sent to slave.
Compared with immediate prior art, the device have the advantages that as follows：
1st, it is applied widely：Low-voltage network power quality controlling device general purpose controller can be applied to breaker, brilliant lock
The power quality controlling device of pipe switching, such as：Power capacitor group reactive power compensator, tuning filtering device, series compensation capacitance
Device, more power change-over switch etc.；The active compensation circuit being made up of available for control controllable semiconductor device, such as：Static reacance
Generator, active filter, three-phase imbalance compensation device, dynamic electric voltage recovery device, uninterruption power source etc..
2nd, scalability is strong：When single controller resource-constrained, expansible multiple controllers use simultaneously.Now one
For controller as main frame, remaining controller passes through communication exchanges data and control command as slave between host and slave processors.This
Sample tunable controls multiple low-voltage network power quality controlling devices, it is worked as a total tune, and enhancing is administered
Effect.
3rd, compatibility is strong：The compatibility of the connectivity port of low-voltage network power quality controlling device general purpose controller is strong,
Such as：The sampling of Sampling Interface compatibility Hall sensor, the sampling of 0~5A current sensors, 0~100V voltage sensor signals；Communication
Port compatible RS485 and RS232；Optical fiber interface compatibility ST types and SC type interfaces；DO interface compatibilities regular tap and high-speed switch.
Low-voltage network power quality controlling device general purpose controller is so caused both to can be used for the quality of power supply of new design research and development and controlled
Device is managed, can be used for replacing existing power quality controlling device controller.
4th, it is compact to design, be easily installed：Controller overall dimensions are 300*240*50, and mounting hole site can fix in corner
It is installed on inside distribution network electric energy quality controlling device, or concentrates and be placed in switch board.
Brief description of the drawings
Fig. 1 is a kind of low-voltage network power quality controlling device general purpose controller structural representation provided by the invention；
Fig. 2 is a kind of low-voltage network power quality controlling device general purpose controller principle schematic provided by the invention；
Fig. 3 is prime signal conditioning circuit figure corresponding to Hall Sampling Interface；
Fig. 4 is prime signal conditioning circuit figure corresponding to CT Sampling Interfaces；
Fig. 5 is prime signal conditioning circuit figure corresponding to PT Sampling Interfaces；
Fig. 6 is rear class A/D convertor circuit wiring diagram；
Fig. 7 is quick DO modular circuits circuit diagram；
Fig. 8 is that general DI interfaces and DI drive circuit diagram corresponding to subelement；
Fig. 9 is that general DO interfaces and general DO drive circuit diagram corresponding to subelement；
Figure 10 is high speed fibre module circuit diagram.
Embodiment
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
A kind of low-voltage network power quality controlling device general purpose controller proposed by the present invention, the controller is detectable to match somebody with somebody
Line voltage distribution, reactive current, harmonic current and three phase unbalance current in electric line, and by controlling capacitor, reactor
Or the switching of capacity reactance combination, modulate the three-phase half-bridge circuit being made up of semiconductor full-controlled device and work, eliminated to reach
Reactive current, harmonic current in circuit, three phase unbalance current, improve the quality of power supply of distribution user.
A kind of structural representation such as Fig. 1 of low-voltage network power quality controlling device general purpose controller provided by the invention
It is shown, including：PCB；
The PCB includes AD sampling modules, dsp chip, quick DO modules, general DI/DO modules and high-speed light
Fiber module；
Line electricity in the AD sampling modules detection low-voltage network power quality controlling device access point distribution line
Pressure and electric current, and input the dsp chip；
Low-voltage network power quality controlling device general purpose controller as core and coordinates corresponding periphery electricity using dsp chip
The control to low-voltage network power quality controlling device is realized on road, when the dsp chip judges that the voltage and current exceedes
During the improvement threshold value pre-set, then the dsp chip is closed a floodgate by quick DO modules or general DI/DO modules controlling switch
Action, or the dsp chip control three-phase half-bridge circuit to carry out PWM work by the high speed fibre module.
Wherein, when the controller controls switching passive device formula device, then the dsp chip controlling switch is closed a floodgate dynamic
Make；When the controller controls active compensation class device, the dsp chip carries out PWM work；
Dsp chip judges that the voltage and current exceedes the improvement threshold value pre-set and included：The dsp chip calculates
Go out the reactive current included in circuit, harmonic current and negative phase-sequence zero-sequence current, judge reactive current virtual value, harmonic current
Exceed the improvement threshold value pre-set with negative phase-sequence zero-sequence current virtual value.Specifically, for reactive current, harmonic current and bear
Sequence zero-sequence current, improvement threshold value is preset respectively, when reactive current, harmonic current and negative phase-sequence zero-sequence current exceed corresponding control
, it is necessary to which controller is disposed when managing threshold value；
Dsp chip is included by quick DO modules or general DI/DO modules controlling switch feed motion：
Dsp chip passes through quick DO modules or general DI/DO modules output switch switching signal, controlling switch feed motion
Carry out the switching of capacitor, reactor or capacity reactance combination；
Dsp chip controls three-phase half-bridge circuit to carry out PWM work by the high speed fibre module to be included：
The dsp chip produces PWM modulation signal, is controlled by the high speed fibre module by semiconductor full-controlled device group
Into three-phase half-bridge circuit carry out PWM work, compensated line reactive current, harmonic current, negative-sequence current and zero-sequence current.
Further, the controller also includes power module, and the power module includes：Power interface and Power convert are single
Member；
The power interface is introduced from outside into dc source, by the Power convert subelement dsp chip backward
With the dc source after AD sampling modules output modulation.
Further, AD sampling modules include：Hall Sampling Interface, Current Transmit Sampling Interface, voltage transformer pt
Sampling Interface and signal condition/AD conversion subelement；
The Hall Sampling Interface, CT Sampling Interfaces and PT Sampling Interfaces gather the low-voltage network power quality controlling
Line voltage distribution and electric current in device access point distribution line, and by described in the signal condition/AD conversion subelement input
Dsp chip；
The signal condition/AD conversion subelement is also connected with the power module.
Further, signal condition/AD conversion subelement includes prime signal conditioning circuit and rear class A/D convertor circuit：
The current signal of access and PT/CT voltage signals are changed and input the rear class by the prime signal conditioning circuit
A/D convertor circuit；
The multiple signals that the rear class A/D convertor circuit inputs the signal conditioning circuit digitize, by digitized result
The dsp chip is transferred in a manner of high speed parallel communication.
Further, quick DO modules include：Quick DO interfaces and quick DO driving subelements；
The quick DO data of the dsp chip are by the quick DO drivings subelement, then pass through the quick DO interfaces
Outwards output.
Further, quick DO drivings subelement uses MOSFET as switching device so that described device is delayed with minimum
Output switch control signal.
Further, general DI/DO modules include：General DI interfaces, DI drivings subelement, general DO interfaces and general DO drive
Subunit；
DI data are transferred to the dsp chip by the general DI interfaces after the DI drives subelement optocoupler；
The common DO data that the dsp chip is sent connect by the general DO driving subelements and the general DO successively
Mouth outwards output.
Further, the high speed fibre module includes：Optical fiber interface and optical fiber driving subelement；
The PWM modulation signal that the dsp chip is sent is after optical fiber driving subelement amplification, by opto-electronic conversion with light
The form of signal is transferred to bottom executive component by the optical fiber interface；
Described two kinds of joints of optical fiber interface compatibility ST types and SC types.
Further, the controller also includes shell, and the shell is Al-alloy metal shell, and power interface, Hall sample
Interface, CT Sampling Interfaces, PT Sampling Interfaces, quick DO interfaces, general DI interfaces, general DO interfaces, communication interface and optical fiber connect
Mouth is distributed in the shell surrounding, to facilitate wiring.
Further, multiple controllers can be divided into main frame and slave, the electricity that the dsp chip of the slave will collect
Pressure, electric current and switching value information transfer are to main frame；
The dsp chip of the main frame collects and handled the voltage, electric current and switching value information, and switch motion is instructed
Slave is handed down to PWM instruction to perform.
Further, the controller also includes serial communication module；
The serial communication module includes：Communication interface and serial communication driving subelement；
The communication interface of slave is used to drive subelement from the dsp chip receiving voltage, electricity by the serial communication
Stream and switching value information, are then sent to main frame；And the switch motion instruction and PWM that Receiving Host is sent are instructed and led to
Cross the serial communication driving subelement and be transferred to the dsp chip；
The communication interface of main frame receives voltage, electric current and switching value information that slave is sent and driven by the serial communication
Subunit is transferred to the dsp chip；And drive subelement to receive from the dsp chip by the serial communication to switch
Action command and PWM instruction, are then sent to slave.
A kind of principle schematic of low-voltage network power quality controlling device general purpose controller is as shown in Figure 2.
Power interface is introduced from outside into 24V dc sources, to dsp chip output 3.3/ after Power convert subelement
1.9V dc sources, 5V dc sources are exported to AD sampling modules.
The circuit of Power convert subelement is：24V dc sources are inputted by phoenix terminal, are sent after electromagnetic interface filter
Turn 5V power supply changeover devices to 24V, so as to obtain direct current 5V power supplys.Direct current 5V passes through two RT8065 chips again, produces respectively
1.9V and 3.3V dc sources.
Signal condition/AD conversion subelement includes prime signal conditioning circuit and rear class A/D convertor circuit：
The current signal of access and PT/CT voltage signals are converted between -10V~+10V by prime signal conditioning circuit
Voltage signal simultaneously inputs rear class A/D convertor circuit；
The multiple signals that rear class A/D convertor circuit inputs signal conditioning circuit digitize, by digitized result with a high speed simultaneously
Row communication mode is transferred to the dsp chip, the multiple signals that specially rear class A/D convertor circuit inputs signal conditioning circuit
Synchronization process, keep amplifying circuit, 16 electric charges by input clamping protective circuit, second order aliasing filter circuit, tracking successively
Distribution successive approximation modulus change-over circuit, digital filter circuit and high-speed parallel interface circuit are carried, most AD sampled results at last
Dsp chip is transferred in a manner of high speed parallel communication.
Fig. 3 is prime signal conditioning circuit corresponding to Hall Sampling Interface, and Hall sampled signal inputs as an electrical current, warp
Cross after precision resister and sampled signal is transformed to voltage signal, then the difference channel and electricity by being made up of operational amplifier
Pressure gives rear class A/D convertor circuit after following circuit.
Fig. 4 is prime signal conditioning circuit corresponding to CT Sampling Interfaces, and outside CT signals first pass through 5A inside controller:
Become voltage signal after 2.5mA CT and high precision sampling resistance, then by the voltage follow that is made up of operational amplifier and
Rear class A/D convertor circuit is given after voltage amplifier circuit.
Fig. 5 is prime signal conditioning circuit corresponding to PT Sampling Interfaces, and outside PT signals first pass through high precision sampling resistance
It is changed into current signal, then by 2mA inside controller:Become voltage signal after 2mA transformer and high precision sampling resistance, so
Afterwards by sending sampled signal to rear class AD conversion electricity after the voltage follow and voltage amplifier circuit that are made up of operational amplifier
Road.
Fig. 6 is rear class A/D convertor circuit wiring, and low-voltage network power quality controlling device general purpose controller uses two panels
AD7606 modulus conversion chips, each chip handle 8 channel sampled datas, realize that chip chamber sampling is same by ADC_CVT signals
Step.Amplifying circuit, 16 electric charges is kept to carry comprising input clamping protective circuit, second order aliasing filter circuit, tracking in AD7606
Distribute successive approximation modulus change-over circuit, digital filter circuit and high-speed parallel interface circuit.After being changed by AD7606
Data signal is transferred to dsp chip by way of parallel communications.
The quick DO data of dsp chip are by quick DO driving subelements, then are outwards exported by quick DO interfaces.Specifically
, quick DO data can be fast switching operation signal, drive subelement and quick DO interfaces by quick DO, prolonged with minimum
When be transferred to high-speed switch.To ensure to use with minimum delay output switch control signal, quick DO drivings subelement
For MOSFET as switching device, conducting delay is less than 200ns, and shut-off delay is less than 100ns so that controller is defeated with minimum delay
The 24V switch controlling signals gone out.
Fig. 7 is quick DO modular circuits, and dsp chip is by writing quick DO data to 74HC273, by 74HC273 by DO
State latch is kept, and then drives MOSFET that quick DO data are acted on into outside high-speed switch.
Fig. 8 is circuit corresponding to general DI interfaces and DI driving subelement, and low-voltage network power quality controlling device leads to
12 road DI input ports are included with controller, DI signals input SN74LVC16244DL after optocoupler, and DSP is by way of inquiry
12 road DI input datas are read from SN74LVC16244DL.
Fig. 9 is circuit corresponding to general DO interfaces and general DO driving subelements, and dsp chip is by writing general DO data extremely
74HC273, general DO state latch is kept by 74HC273, then drive relay that general DO data are acted on into outside
Switch.
Serial communication module circuit：The circuit is RS232 and RS485 two-in-one circuits.Drawn from dsp chip serial logical
Believe that signal carries out level conversion after light-coupled isolation, then simultaneously into SP485EE and SP232EE, respectively obtain RS485 with
The serial communication interface of RS232 interface, user select the type of serial line interface by wire jumper interface JP2 and JP3.
Figure 10 is high speed fibre modular circuit, is driven at a high speed after 75451B amplifies from the pwm signal that dsp chip is sent
Fibre-optical splice produces corresponding optical signal.The PCB of two kinds of fibre-optical splices of ST types and SC types encapsulation is integrated, can according to
Family needs to weld corresponding fibre-optical splice.
Finally it should be noted that:Above example is merely to illustrate the technical scheme of the application rather than to its protection domain
Limitation, although the application is described in detail with reference to above-described embodiment, those of ordinary skill in the art should
Understand:Those skilled in the art read the embodiment of application can be still carried out after the application a variety of changes, modification or
Person's equivalent substitution, but these changes, modification or equivalent substitution, are applying within pending claims.
Claims (15)
- A kind of 1. low-voltage network power quality controlling device general purpose controller, it is characterised in that including：PCB；The PCB includes AD sampling modules, dsp chip, quick DO modules, general DI/DO modules and high speed fibre mould Block；Line voltage distribution in AD sampling modules detection low-voltage network power quality controlling device access point distribution line and Electric current, and input the dsp chip；When the dsp chip judges that the voltage and current exceedes the improvement threshold value pre-set, then the dsp chip leads to Quick DO modules or general DI/DO modules controlling switch feed motion are crossed, or the dsp chip passes through the high speed fibre mould Block control three-phase half-bridge circuit carries out PWM work.
- 2. controller as claimed in claim 1, it is characterised in that when the controller controls switching passive device formula device When, then the dsp chip controlling switch feed motion；When the controller controls active compensation class device, the dsp chip carries out PWM work.
- 3. controller as claimed in claim 1, it is characterised in that it is pre- that the dsp chip judges that the voltage and current exceedes The improvement threshold value first set includes：The dsp chip calculates the reactive current included in circuit, harmonic current and negative phase-sequence zero-sequence current, judges reactive current Virtual value, harmonic current and negative phase-sequence zero-sequence current virtual value exceed the improvement threshold value pre-set.
- 4. controller as claimed in claim 1, it is characterised in that the dsp chip passes through quick DO modules or general DI/DO Module controlling switch feed motion includes：The dsp chip passes through quick DO modules or general DI/DO modules output switch switching signal, controlling switch feed motion Carry out the switching of capacitor, reactor or capacity reactance combination.
- 5. controller as claimed in claim 1, it is characterised in that the dsp chip is controlled by the high speed fibre module Three-phase half-bridge circuit, which carries out PWM work, to be included：The dsp chip produces PWM modulation signal, is made up of high speed fibre module control semiconductor full-controlled device Three-phase half-bridge circuit carries out PWM work, compensated line reactive current, harmonic current, negative-sequence current and zero-sequence current.
- 6. controller as claimed in claim 1, it is characterised in that also include including power module, the power module：Power supply Interface and Power convert subelement；The power interface is introduced from outside into dc source, by the Power convert subelement dsp chip and institute backward State the dc source after the output modulation of AD sampling modules.
- 7. controller as claimed in claim 1, it is characterised in that the AD sampling modules include：Hall Sampling Interface, electric current Transformer CT Sampling Interfaces, voltage transformer pt Sampling Interface and signal condition/AD conversion subelement；The Hall Sampling Interface, CT Sampling Interfaces and PT Sampling Interfaces gather the low-voltage network power quality controlling device Line voltage distribution and electric current in access point distribution line, and input the DSP cores by the signal condition/AD conversion subelement Piece；The signal condition/AD conversion subelement is also connected with the power module.
- 8. controller as claimed in claim 7, it is characterised in that the signal condition/AD conversion subelement is believed including prime Number modulate circuit and rear class A/D convertor circuit：The current signal of access and PT/CT voltage signals are changed and input the rear class AD by the prime signal conditioning circuit to be turned Change circuit；The multiple signals that the rear class A/D convertor circuit inputs the signal conditioning circuit digitize, by digitized result with height Fast parallel communication fashion is transferred to the dsp chip.
- 9. controller as claimed in claim 1, it is characterised in that the quick DO modules include：Quick DO interfaces and quick DO drives subelement；The quick DO data of the dsp chip are outside by the quick DO drivings subelement, then by the quick DO interfaces Output.
- 10. controller as claimed in claim 9, it is characterised in that the quick DO drivings subelement uses MOSFET conducts Switching device so that described device is with minimum delay output switch control signal.
- 11. controller as claimed in claim 1, it is characterised in that the general DI/DO modules include：General DI interfaces, DI Drive subelement, general DO interfaces and general DO driving subelements；DI data are transferred to the dsp chip by the general DI interfaces after the DI drives subelement optocoupler；The common DO data that the dsp chip is sent successively by the general DO driving subelement and the general DO interfaces to Outer output.
- 12. controller as claimed in claim 1, it is characterised in that the high speed fibre module includes：Optical fiber interface and optical fiber Drive subelement；The PWM modulation signal that the dsp chip is sent is after optical fiber driving subelement amplification, by opto-electronic conversion with optical signal Form bottom executive component is transferred to by the optical fiber interface；Described two kinds of joints of optical fiber interface compatibility ST types and SC types.
- 13. the controller as described in claim 1-12 any bars, it is characterised in that also closed including shell, the shell for aluminium Golden metal shell, power interface, Hall Sampling Interface, CT Sampling Interfaces, PT Sampling Interfaces, quick DO interfaces, general DI interfaces, General DO interfaces, communication interface and optical fiber interface are distributed in the shell surrounding.
- 14. controller as claimed in claim 13, it is characterised in that multiple controllers are divided into main frame and slave, described The dsp chip of slave is by the voltage collected, electric current and switching value information transfer to main frame；The dsp chip of the main frame collects and handled the voltage, electric current and switching value information, and by switch motion instruction and PWM instruction is handed down to slave execution.
- 15. controller as claimed in claim 14, it is characterised in that also including serial communication module；The serial communication module includes：Communication interface and serial communication driving subelement；The communication interface is used to drive subelement from the dsp chip receiving voltage, electric current and to open by the serial communication Information is measured in pass, is then sent to main frame；And the switch motion instruction and PWM that Receiving Host is sent instruct and by described Serial communication driving subelement is transferred to the dsp chip；Or receive voltage, electric current and switching value information that slave is sent and drive subelement to be transferred to institute by the serial communication State dsp chip；And subelement is driven to receive switch motion instruction and PWM tune from the dsp chip by the serial communication System instruction, is then sent to slave.
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| CN110445141A (en) * | 2019-08-20 | 2019-11-12 | 上海艾临科智能科技有限公司 | A kind of electric energy administers control method and control device |
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| CN111045405A (en) * | 2019-12-16 | 2020-04-21 | 上海新华控制技术集团科技有限公司 | Switching value switching output terminal board |
| CN112230573A (en) * | 2020-03-18 | 2021-01-15 | 石家庄德堃电子科技有限公司 | Intelligent online distribution load balancing process controller |
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