CN106054752B - Active power filter control system based on FPGA and its switching method - Google Patents
Active power filter control system based on FPGA and its switching method Download PDFInfo
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- CN106054752B CN106054752B CN201610667276.4A CN201610667276A CN106054752B CN 106054752 B CN106054752 B CN 106054752B CN 201610667276 A CN201610667276 A CN 201610667276A CN 106054752 B CN106054752 B CN 106054752B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24048—Remote test, monitoring, diagnostic
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Abstract
A kind of active power filter control system and control method based on FPGA, the system include n power module, two central control modules and a display module；The signal output end of the central control module is separately connected the signal input part of each power module, is interconnected between display module and central control module, is interconnected between two central control modules.The present invention is by being arranged two central controllers, and make interactive information between two central controllers, when ensureing that any one central controller breaks down, what another can be accessible continues to control each power module, improves system stability, reliability.
Description
Technical field
The present invention relates to a kind of active power filter control system and its switching method based on FPGA.
Background technology
Active Power Filter-APF（APF）It is to inhibit the power electronic equipment of harmonic current as a kind of dynamic and close extensively
Note, the compensation performance quality of APF are related with its used control mode.
Existing control mode is only there are one central control module, due to the use of frequent, therefore holds in the process of work
Easily break down, once and central control module breaks down, whole system can only stop transport maintenance.
In addition, in existing system, central control module does not have central controller, in such systems, each power cell
All it is to need external mutual inductor, increases the complexity of electrical wiring design and walk Wiring technology；Meanwhile power cell itself acquires
Load current is not accomplished to monitor and dynamically distribute in real time to the distribution of the electric current of each module.
Invention content
The technical problem to be solved by the present invention is to existing systems to be easy failure, and maintenance of intelligently stopping transport after failure, influence
Production, and system does not accomplish to monitor and dynamically distribute in real time to the distribution of the electric current of each module.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of active power filtering based on FPGA
Device control system, including n power module, two central control modules and a display module；The central control module
Signal output end is separately connected the signal input part of each power module, interaction company between display module and central control module
It connects, is interconnected between two central control modules.
Two central control modules are set, any one module goes wrong, another due to backing up simultaneously, can
To realize the substitute without influence so that while maintenance failure central control module, whole system can also continue maintenance personal
Operating；In addition, each part in system（Display unit, primary module, power module）Between realize high speed real-time communication, ensure that
The reliability of the promptness of the operation of equipment and state switching, real-time and equipment work.
Further, the central control module includes signal acquiring board and the central controller based on FPGA；Signal acquisition
Plate samples the three-phase power grid voltage of each power module, threephase load electric current, three-phase APF output currents, and sample information is real
When transmit central controller；The central controller includes data acquisition unit, sample processing unit, principal communication unit, center
Controller switch logic control unit, display data is collected and processing unit, protection location and communication unit；Signal acquiring board
Signal output end connects the signal input part of data acquisition unit；The signal output end of data acquisition unit connects sampling processing list
The signal input part of member；The signal output end of sample processing unit divides two-way to be separately connected display data collection and processing unit
The signal input part of signal input part and protection location；Display data is collected and the signal output end and protection location of processing unit
Signal output end be all connected with the input terminal of communication unit；Principal communication unit connects for interaction between two central control modules
It connects, the information of another central control module is transferred to central controller switch logic control unit by signal output end, center
The output end of controller switch logic control unit divides two-way, sends feedback signal all the way and gives principal communication unit, another way connection
Communication unit.In system, all power modules are connected to main control module and spare module by optical fiber, in addition to the big electricity of three-phase, work(
Rate unit is physically entered without other again, and whole equipment only can realize multiple active power filter moulds with one group of mutual inductor
The parallel running of block solves the problems, such as to be limited to mutual inductor load capacity when the more parallel runnings of conventional active filter, such as
This, the output current of power cell, the information exchange etc. between power module is all under being responsible for by main control module or spare module
Hair, for example according to total load current, the output current of each power module is dynamically distributed, according to the state of each power cell（Therefore
Barrier or shutdown etc.）The carrying electric current etc. of other power modules is dynamically distributed, realizes unified management；Avoiding in conventional method makes
A large amount of external mutual inductor reduces the complexity of electrical wiring design and walks Wiring technology, saved cost.
In order to ensure a kind of steady, Active Power Filter-APF controlling party based on FPGA of two central controllers switching
Method includes the following steps：Step 1：System electrification, central control module enter breakdown judge pattern, the breakdown judge pattern
Judge and activate to judge including faults itself；The activation judgement refers to working as to detect another central control module fault-free
When, send activation command to another central control module；Faults itself judgement refers to working as to detect that itself is faulty, jump procedure
6, when detecting itself fault-free, redirect in next step；Step 2：According to the letter for the central control module that display module receives
Road number judges that the trouble-free central control module for main control module or spare module, when being judged as main control module, redirects
In next step；Step 3：Judge that the power module being connect with main control module whether there is, such as exist, redirects in next step, be such as not present,
Main control module does not activate；Step 4：Judge whether the main control module of the activation receives the activation command of spare module transmission, such as
Activation command is received, main control module is activated, is such as not received by activation command, continues to judge, is master control mould in current block
Block, and main control module and spare module are online but when not activating, main control module activates itself；Step 5：Constantly detection activates
Whether main control module is normal, if normal always, activated state, system operation is maintained down always；If abnormal, step is redirected
Rapid 6；Step 6：Spare module detects that main control module is improper, stops sending activation command to main control module, main control module stops
Only activate；If main control module detects that spare module is normal, continue to send activation command, spare module activation to spare module；
If main control module detects that spare module is improper, redirect in next step；Step 7：Central control module is exported to display module
System fault message, and whether cycle detection failure is restored.
Further, in step 1, faults itself judgement refers to central control module according to the telecommunications numerical quantity detected, leads to
The feedback signal that letter receives judges whether it is working properly；Activation judges to refer to sending state between central control module to post
Storage, includes mutual status information in status register, and a central control module receives another central control module and sends
Status information, and judge whether another central control module working properly.By way of two kinds of breakdown judges so that in office
When what central control module is idle, supervisory function bit can be also played, ensures to switch when failure timely, is also ensured
The stabilization duration of system work.
Further, in step 3, judge that the method that the power module being connect with main control module whether there is is：Main control module
Itself has more than one pair of communication channel, a pair of of communication channel is correspondingly connected with a power module, and main control module is according to reception
To the power module status register that uploads judge whether the power module normal and whether corresponding communication channel complete
It is whole；If there is status register uploads, then judge that the corresponding power module of the channel exists；If stateless register uploads,
Then judge that the corresponding power module of the channel is not present.
It is an advantage of the invention that：By the way that two central controllers are arranged, and make interaction letter between two central controllers
Breath, when ensureing that any one central controller breaks down, what another can be accessible continues to control each power module
System, improves system stability, reliability.
Description of the drawings
Fig. 1 is the structure diagram of present system.
Fig. 2 is the structure diagram of central control module of the present invention.
Fig. 3 is the flow diagram of control method of the present invention.
Specific implementation mode
As shown in Figs. 1-2, the present invention includes 16 power modules, two central control modules and a display module；Institute
The signal output end for stating central control module is separately connected the signal input part of each power module, and display module and center control
It interconnects between module, is interconnected between two central control modules.The central control module includes signal acquiring board
With the central controller based on FPGA；Signal acquiring board sample the three-phase power grid voltage of each power module, threephase load electric current,
Three-phase APF output currents, and sample information is transmitted into central controller in real time；The central controller includes that data acquisition is single
Member, sample processing unit, principal communication unit, central controller switch logic control unit, display data collection and processing unit,
Protection location and communication unit；The signal input part of the signal output end connection data acquisition unit of signal acquiring board；Data are adopted
Collect the signal input part of the signal output end connection sample processing unit of unit；The signal output end of sample processing unit divides two-way
Display data is separately connected to collect and the signal input part of processing unit and the signal input part of protection location；Display data is collected
The input terminal of communication unit is all connected with the signal output end of processing unit and the signal output end of protection location；Principal communication unit
For being interconnected between two central control modules, during the information of another central control module is transferred to by signal output end
It entreats controller switch logic control unit, the output end of central controller switch logic control unit to divide two-way, sends all the way anti-
Feedback signal gives principal communication unit, another way connection communication unit.
As shown in figure 3, some status registers clear first exist with whole flow process, they are in main control module, spare
It is transmitted between module, power module, is detection and foundation when logic switch；
Display unit channel optical fiber register
Main mould block status register：
" upper layer " so-called in table --- -- to primary module, display unit is its upper layer；To power module ----primary module is it
Upper layer；It is so-called " spare " ----it is mutual, master control is active and standby spare, and active and standby is the spare of master control；A moment, master control
Or it is active and standby, any one, and only there are one being active, system can work normally.
Primary module fiber channel register：
From module status register：
The switch logic of the method for the present invention is described as follows：
After the power is turned on, main control module or spare module first judge itself there is fault-free（Failure includes：Sample failure, power supply
Failure etc.）, faulty to enter troubleshooting pattern（Fault case operating mode：It, can be actively as one of central control module
Judge whether another piece of central control module normal, if its normally if actively to send out activation command be another activation of block, if not
Normally, i.e. two pieces of central control modules enter fault case, and output system fault warning information reminds staff, on the one hand
Whether cycle detection failure is restored）；
After central control module judges itself fault-free, judges into next stage, determine whether main control module, judged
Cheng Shi：It is determined according to the optical-fibre channel number being connect with display board, optical-fibre channel is 1---- main control modules；Optical-fibre channel number is
0--- spare modules.
Main control module fault-free followed by judges whether there is power module presence, if so, then carrying out in next step, if do not had
Have, then main control module is directly entered not state of activation；
If there is power module exists, judge whether to receive external activation order in next step, if there is spare module is sent out
The activation command sent then unconditionally activates the main control module；
If no activation command comes, main control module is then determined whether, and main control module and spare module are online
Without activating（Mutual hero of biography module status register between main control module and spare module）, then main control module activate itself；If
No spare module, and spare module does not activate, communication board shows the non-multi master either non-multi master of slave（I.e. display unit only detects
A central control module is only detected to a central control module or power module, is so to ensure in two pieces
Entreat control module simultaneously after the power is turned on, when going to this step, when main control module and spare module all meet activation condition, preferentially
Activate main control module）；This is gone to, main control module or spare module have been activated one piece, bad subsequently into infinitely following, and constantly examine
Whether the central control module for surveying activation is normal, if normal always, activated state, system operation is maintained down always；If
Abnormal, into fault case, troubleshooting pattern has described above.Main control module activation simultaneously, spare module are in inactive
When state, spare module nor not as, it is in the state that monitors main control module in real time and waits for taking orders, if
In the process, spare module receives the activation command that main control module sends over, and judges flow into normal Activate；If spare
Module actively monitoring is online to main control module but does not activate（When communication failure or other failures, activation command sends failure
When）, likewise enter activation and judge flow；Or worse situation, i.e. spare module judge that main control module is not online, slave
（Power module）Non-multi master and communication（Display unit）Non-multi master, into activation interpretation flow.
Main control module is never activated to activation, and there are two types of approach, first, active activation, standby when main control module detection fault-free
After module presence and not activating, independently enter activation pattern；Second of approach is passively to activate, and main control module receives spare
The activation command that module sends over is detected simultaneously by spare module and does not activate, and then main control module enters activation pattern；Together
Sample, it is also both approach that spare module, which enters activation pattern,.Purpose so is to ensure in synchronization, can only there are one
Central control module is active.
Main control module has with display unit simultaneously and only a pair of of sending and receiving telecommunication optical fiber is attached, from display unit angle
Degree sets out, and display unit has 2 pairs of communication channels, and it is 1 that one pair of which channel, which enables its code name, is connected to main control module, another pair letter
Road code name is 0, is connected to spare module, referred to as " upper layer fiber channel 1 ", " upper layer fiber channel 0 ".
Claims (4)
1. a kind of active power filter control system based on FPGA, it is characterized in that：Including n power module, two centers
Control module and a display module；
It is interconnected between the display module and central control module, two central control modules are respectively connected by a channel
Display module, display module distinguish different central control modules by channel number；
The signal output end of the central control module is separately connected the signal input part of each power module, central control module
It is equipped with channel interface corresponding with each power module, a power module connects center by a corresponding channel interface
Control module；
Described two central control modules one are main control module, another is spare module, main control module and spare module it
Between interconnect；
The central control module includes signal acquiring board and the central controller based on FPGA；
Signal acquiring board samples the three-phase power grid voltage of each power module, threephase load electric current, three-phase APF output currents, and
Sample information is transmitted into central controller in real time；
The central controller includes data acquisition unit, sample processing unit, principal communication unit, central controller switch logic
Control unit, display data is collected and processing unit, protection location and communication unit；
The signal input part of the signal output end connection data acquisition unit of signal acquiring board；
The signal input part of the signal output end connection sample processing unit of data acquisition unit；
The signal output end of sample processing unit divides the signal input part that two-way is separately connected display data collection and processing unit
With the signal input part of protection location；Display data is collected and the output of the signal of the signal output end of processing unit and protection location
End is all connected with the input terminal of communication unit；
Principal communication unit is used between two central control modules interconnect, and signal output end is by another central control module
Information be transferred to central controller switch logic control unit, the output end of central controller switch logic control unit is divided to two
Road sends feedback signal and gives principal communication unit, another way connection communication unit all the way.
2. a kind of Control Method of Active Power Filter based on FPGA, it is characterized in that including the following steps：
Step 1：System electrification, central control module enter breakdown judge pattern, and the breakdown judge pattern includes faults itself
Judge and activation judges；The activation judgement refers to when detecting another central control module fault-free, to another center
Control module sends activation command；Faults itself judgement refers to the jump procedure 6 when detecting that itself is faulty, when detect from
When body fault-free, redirect in next step；
Step 2：According to the channel number for the central control module that display module receives, the trouble-free center control mould is judged
Block is main control module or spare module, when being judged as main control module, is redirected in next step；
Step 3：Judge that the power module being connect with main control module whether there is, such as exist, redirects in next step, be such as not present, it is main
Control module does not activate；
Step 4：Judge whether the main control module of the activation receives the activation command of spare module transmission, such as receives activation life
It enables, activates main control module, be such as not received by activation command, continue to judge, be main control module, and main control module in current block
Online with spare module but when not activating, main control module activates itself；
Step 5：Whether the main control module of constantly detection activation is normal, if normal always, maintains activated state, system fortune always
Row goes down；If abnormal, jump procedure 6；
Step 6：Spare module detects that main control module is improper, stops sending activation command to main control module, main control module stops
Only activate；If main control module detects that spare module is normal, continue to send activation command, spare module activation to spare module；
If main control module detects that spare module is improper, redirect in next step；
Step 7：Central control module is to display module output system fault message, and whether cycle detection failure is restored.
3. a kind of Control Method of Active Power Filter based on FPGA according to claim 2, it is characterized in that：Step 1
In, faults itself judges refer to central control module according to the telecommunications numerical quantity detected, communicate the feedback signal that receives come
Judge whether it is working properly；
Activation judges to refer to that status register is sent between central control module, believes comprising mutual state in status register
Breath, a central control module receives the status information that another central control module is sent, and judges another central control module
It is whether working properly.
4. a kind of Control Method of Active Power Filter based on FPGA according to claim 2, it is characterized in that：Step 3
In, judge that the method that the power module being connect with main control module whether there is is：Main control module itself has more than one pair of logical
Believe that channel, a pair of of communication channel are correspondingly connected with a power module, the shape that main control module is uploaded according to the power module received
State register judges whether the power module is normal and whether corresponding communication channel is complete；If there is status register
It uploads, then judges that the corresponding power module of the channel exists；If stateless register uploads, the corresponding work(of the channel is judged
Rate module is not present.
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