CN107834817A - A kind of current transformer parallel operation control method and control system - Google Patents
A kind of current transformer parallel operation control method and control system Download PDFInfo
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- CN107834817A CN107834817A CN201711104743.3A CN201711104743A CN107834817A CN 107834817 A CN107834817 A CN 107834817A CN 201711104743 A CN201711104743 A CN 201711104743A CN 107834817 A CN107834817 A CN 107834817A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
This application discloses a kind of current transformer parallel operation control method and control system, the system includes EtherCAT main websites and corresponds the EtherCAT slave stations set with each parallel converters；EtherCAT slave stations are included from station control and microprocessor；The EtherCAT main websites and each EtherCAT slave stations connect into bus-network topological structure.EtherCAT is used to generate synchronizing signal from station control, is sent to corresponding microprocessor；The value of time reference phase register is loaded as the counting initial value of time reference counter counting generation triangular carrier by microprocessor when rising edge or trailing edge occurs in the synchronizing signal；Wherein, the value of the periodic quantity of the value of the time reference phase register and the time reference counter, meet loading the moment always occur in triangular carrier bottom point arrive when or before.The synchronism of carrier wave when the application improves current transformer parallel operation.
Description
Technical field
The present invention relates to technical field of industrial automatic control, more specifically to a kind of current transformer parallel operation control
Method and control system processed.
Background technology
Current transformer parallel connection is one of major way of current transformer dilatation.Will to the synchronism of carrier wave during current transformer parallel operation
Ask very high, carrier wave is asynchronous to cause circulation occur between current transformer, so as to have influence on the stability of whole parallel system and reliable
Property.
The content of the invention
In view of this, the present invention provides a kind of current transformer parallel operation control method and control system, to improve current transformer
The synchronism of carrier wave during parallel running.
A kind of current transformer parallel operation control method, applied to current transformer parallel operation control system, the current transformer is simultaneously
Joining operation control system includes EtherCAT main websites and corresponds the EtherCAT slave stations set with each parallel converters；Institute
State EtherCAT slave stations include from station control and with the microprocessor being connected from station control；The EtherCAT main websites
Bus-network topological structure is connected into each EtherCAT slave stations；
The current transformer parallel operation control method includes：
Each microprocessor obtains the feedback data of current transformer, EtherCAT corresponding to write-in from station control, by
EtherCAT main websites are read；
EtherCAT main websites generate modulating wave and control command according to the feedback data of each current transformer, write each EtherCAT
From station control, by corresponding microcomputer reads；
Each EtherCAT generates synchronizing signal from station control, is sent to corresponding microprocessor；
Each microprocessor deposits the time reference phase of itself when rising edge or trailing edge occurs in the synchronizing signal
The value of device is loaded into the time reference counter of itself, and the time reference counter starts counting up from the value produces triangle load
Ripple；Wherein, the value of the periodic quantity of the value of the time reference phase register and the time reference counter, loading is met
Moment always occur in triangular carrier bottom point arrive when or before；
Each microprocessor each EPWM of triggering when the bottom point of triangular carrier and summit arrive is interrupted, when EPWM is interrupted
Corresponding actions are performed according to the modulating wave and control command.
Optionally, the deviation between each microprocessors of value ＞ and reference clock of the time reference phase register is most
Big value；
The periodic quantity of the time reference counter is equal to the periodic quantity of the synchronizing signal.
Optionally, the value of the time reference phase register is 0；
The difference of the periodic quantity of the periodic quantity of the time reference counter and the synchronizing signal >=each microprocessor and ginseng
Examine the maximum of the deviation between clock.
A kind of current transformer parallel operation control system, including EtherCAT main websites and with each parallel converters correspond
The EtherCAT slave stations of setting；The EtherCAT slave stations include from station control and with it is described from station control be connected it is micro- from
Manage device；The EtherCAT main websites and each EtherCAT slave stations connect into bus-network topological structure；
The microprocessor is used to obtain the feedback data of current transformer, EtherCAT corresponding to write-in from station control,
Read by EtherCAT main websites；
The EtherCAT main websites are used to generate modulating wave and control command according to the feedback data of each current transformer, and write-in is each
EtherCAT is from station control, by corresponding microcomputer reads；
The EtherCAT is used to generate synchronizing signal from station control, is sent to corresponding microprocessor；
The microprocessor is additionally operable to the time reference of itself when rising edge or trailing edge occurs in the synchronizing signal
The value of phase register is loaded into the time reference counter of itself, and the time reference counter starts counting up production from the value
Raw triangular carrier；Wherein, the value of the periodic quantity of the value of the time reference phase register and the time reference counter,
Meet loading the moment always occur in triangular carrier bottom point arrive when or before；
The microprocessor is additionally operable to each EPWM of triggering in the bottom point of triangular carrier and summit arrival and interrupted,
Corresponding actions are performed according to the modulating wave and control command when EPWM is interrupted.
Optionally, the deviation between each microprocessors of value ＞ and reference clock of the time reference phase register is most
Big value；
The periodic quantity of the time reference counter is equal to the periodic quantity of the synchronizing signal.
Optionally, the value of the time reference phase register is 0；
The difference of the periodic quantity of the periodic quantity of the time reference counter and the synchronizing signal >=each microprocessor and ginseng
Examine the maximum of the deviation between clock.
It can be seen from the above technical scheme that the present invention is based on EtherCAT network structure current transformer parallel operation control
System, cause synchronizing signal to synchronously arrive at each microprocessor using the clock synchronizing function of EtherCAT network, realize carrier wave
It is synchronous.Moreover, the present invention is also by rationally setting the value of time reference phase register and time reference meter in each microprocessor
The periodic quantity of number device so that the synchronous point of synchronizing signal always counts down to the bottom point of triangular carrier in time reference counter
When or reach each microprocessor before, continuous there is the sequential entanglement phenomenon that EPWM is interrupted twice so as to avoid.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of current transformer parallel operation control method flow chart disclosed in the embodiment of the present invention；
Fig. 2 is a kind of current transformer parallel operation control system architecture schematic diagram disclosed in the embodiment of the present invention；
Fig. 3 is triangular carrier schematic diagram；
Fig. 4 is triangular carrier and synchronizing signal timing diagram ideally；
Fig. 5 is the triangular carrier and synchronizing signal timing diagram being actually likely to occur；
Fig. 6 is a kind of triangular carrier disclosed in the embodiment of the present invention and synchronizing signal timing diagram；
Fig. 7 is another triangular carrier disclosed in the embodiment of the present invention and synchronizing signal timing diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 1, the embodiment of the invention discloses a kind of current transformer parallel operation control method, applied to as shown in Figure 2
Current transformer parallel operation control system.
The simple structure of the current transformer parallel operation control system is summarized as follows：The current transformer parallel operation control system
System includes EtherCAT main websites and corresponds the EtherCAT slave stations set with each parallel converters；The EtherCAT from
Stand the microprocessor being connected including EtherCAT from station control and with the EtherCAT from station control；The EtherCAT
Main website and each EtherCAT slave stations connect into bus-network topological structure.
Below, start with from introducing EtherCAT technologies, the construction of the current transformer parallel operation control system is carried out detailed
It is thin to illustrate.
(Ethernet for Controland Automation Technology, Ethernet control are automatic by EtherCAT
Change technology) it is a kind of real-time industrial ethernet technology.It has that transmission capacity is big, transmission speed is fast, clock synchronism is high, realizes
The features such as cost is low, open good.
EtherCAT network uses master-slave communication pattern, generally has an EtherCAT master in an EtherCAT network
Stand and several EtherCAT slave stations.EtherCAT main websites use the ethernet controller of standard.EtherCAT slave stations mainly wrap
EtherCAT is included from station control (such as ET1100 from station control) and microprocessor (such as DSP).In any EtherCAT
In slave station, EtherCAT is used to realize the data exchange between EtherCAT main websites and microprocessor from station control；Microprocessor
Device is responsible for reading control data from station control from EtherCAT, realizes equipment control function, and sample the anti-of the equipment
Data are presented, EtherCAT is from station control for write-in, is read by EtherCAT main websites.
Current transformer parallel operation control system disclosed in the embodiment of the present invention be based on EtherCAT network it is built-up,
EtherCAT slave stations are corresponded with parallel converters and set, and what the equipment in EtherCAT network referred to is exactly current transformer.
EtherCAT network supports multiple network topological structure, and current transformer parallel operation disclosed in the embodiment of the present invention controls
EtherCAT network of the system based on type trunk network topology structure is built-up, be described in detail below (for ease of being described below,
The EtherCAT of each EtherCAT slave stations is respectively designated as from station control 1 by the application from station control, from station control
2nd ..., from station control n-1, from station control n)：The EtherCAT network of the type trunk network topology structure, refers to
The transmitting terminal TX connections of EtherCAT main websites are from the receiving terminal RX of station control 1, from the transmitting terminal TX connection slave stations of station control 1
The receiving terminal RX ... ... of controller 2, from station control n-1 transmitting terminal TX connections from station control n receiving terminal RX, slave station
The receiving terminal RX of controller n transmitting terminal TX connection EtherCAT main websites, as shown in Figure 2.
Because EtherCAT network has the characteristics of clock synchronism is high, therefore under type trunk network topology structure, this
Current transformer parallel operation control system meets following feature disclosed in inventive embodiments：EtherCAT main websites are selected from stand control
In the case that the clock of device 1 is as reference clock, cause EtherCAT master clocks and slave station control using clock synchronizing function
2~n of device processed clock is consistent with reference clock, and clock synchronizing function has considered EtherCAT data frames each
Clock initial offsets and each EtherCAT of the EtherCAT from the transmission delay between station control, each EtherCAT from station control
The Dynamic dithering in slave station controller clock source, it is thus achieved that EtherCAT main websites and each EtherCAT in EtherCAT network
The full synchronization of slave station controller clock.
Current transformer parallel operation control method as shown in Figure 1, is specifically included：
Step S01：Each microprocessor obtains the feedback data of current transformer, and EtherCAT corresponding to write-in is from station control
In, read by EtherCAT main websites.
Specifically, the feedback data of current transformer, refers to the current transformer operational factor sampled, such as current transformer voltage x current
Signal etc..
Step S02：EtherCAT main websites generate modulating wave and control command according to the feedback data of each current transformer, and write-in is each
EtherCAT is from station control, by corresponding microcomputer reads.
Specifically, current transformer parallel operation control system is to be responsible for completing all EtherCAT slave stations by EtherCAT main websites
The task that control algolithm needed for operation calculates, then the modulating wave for calculating generation and control command are sent out by EtherCAT data frames
Each EtherCAT slave stations are given, this centralized control realizes the unification of modulating wave, avoids each current transformer because of modulation
Circulation problem caused by ripple disunity.
Step S03：Each EtherCAT generates synchronizing signal from station control, is sent to corresponding microprocessor.
Specifically, synchronizing signal is theoretically the pulse signal with carrier synchronization, the cycle of synchronizing signal and pulsewidth are set
Each EtherCAT is write when upper electricity is initial by EtherCAT main websites from station control, afterwards each EtherCAT from station control from
Row produces synchronizing signal, and gives corresponding microprocessor by hardware connection and I/O communications.Due to current transformer parallel operation
Control system can realize the full synchronization of EtherCAT main websites and each EtherCAT slave stations controller clock, therefore respectively
From station control, voluntarily caused synchronizing signal can synchronously arrive at each microprocessor to EtherCAT.
Step S04：Each microprocessor is when rising edge or trailing edge occurs in the synchronizing signal by the time reference of itself
The value of phase register is loaded into the time reference counter of itself, and the time reference counter starts counting up production from the value
Raw triangular carrier；Wherein, the value of the periodic quantity of the value of the time reference phase register and the time reference counter,
Meet loading the moment always occur in triangular carrier bottom point arrive when or before.
Step S05：Each microprocessor respectively triggers an EPWM (Enhanced when the bottom point of triangular carrier and summit arrive
Pulse Width Moducation) interrupt, corresponding actions are performed according to the modulating wave and control command when EPWM is interrupted.
Specifically, when an only current transformer, it is not necessary to carry out carrier synchronization, now microprocessor using itself when
Between reference counter count to form triangular carrier, its process is as follows：Assuming that the counting initial value of time reference counter be 0, then when
Between reference counter the summit of triangular carrier is first counted up to since 0, form the rising edge of triangular carrier, then countdown
To the bottom point (bottom point of triangular carrier is 0) of triangular carrier, the trailing edge of triangular carrier is formed, is so moved in circles, so as to shape
Into triangular carrier, as shown in Figure 3.All trigger an EPWM when counting down to bottom point and the summit of triangular carrier every time to interrupt, micro- place
Manage device and corresponding actions are performed according to the modulating wave and control command received when EPWM is interrupted.
When current transformer parallel connection, synchronizing signal can be injected in each microprocessor to realize carrier synchronization, its process is such as
Under：Because synchronizing signal is theoretically synchronous with triangular carrier, so in advance by the reference phase register in microprocessor
Value set to 0；Each microprocessor (i.e. when synchronous point SYNC0 arrives), is incited somebody to action advance when rising edge or trailing edge occurs in synchronizing signal
The value for the reference phase register being stored in this microprocessor is loaded into the time reference counter in this microprocessor, is made
Obtain time reference counter to start counting up to form triangular carrier from the value, as shown in Figure 4.Because each EtherCAT is from station control
Voluntarily caused synchronizing signal can synchronously arrive at each microprocessor, so carrier synchronization can be realized.
, might not be with but it should be recognized that because actually each microprocessor has respective clock source
The reference clock of EtherCAT network is definitely consistent, and each between exist clock source count offset issue, so synchronizing signal
It is probably slightly devious in synchronism between triangular carrier.Specifically, for any microprocessor, when benchmark phase
When the value of bit register is set to 0, if the clock ratio reference clock of the microprocessor will occur that synchronous point SYNC0 arrives soon
When the microprocessor time reference counter counted down to bottom point and started incremental count, but but can be by synchronization
Signal pressure pulls down to bottom point and counted again, and so as to EPWM interruptions twice continuously occur, this does not allow, as shown in Figure 5.
To avoid the occurrence of operating mode as shown in Figure 5, it need to ensure synchronous point SYNC0 always in time reference counter countdown
To triangular carrier bottom point when or reach before, and this depends on the value and time reference counter of time reference phase register
Periodic quantity value.Two kinds of value modes are given below：
Mode 1：For each microprocessor, the value Δ T ＞ of the time reference phase register can be set each micro-
The maximum Δ X of deviation between processor and reference clock, and the periodic quantity of time reference counter is equal to synchronizing signal
Periodic quantity T.
Specifically, assume that the deviation between certain microprocessor and reference clock is Δ Z, Δ Z≤Δ X, then the microprocessor
Time reference counter started counting up when synchronous point SYNC0 arrives with Δ T, according to the bottom for first counting down to triangular carrier
The mode cycle count that point counts up to the summit of triangular carrier again forms triangular carrier, and time reference counter is completed one week
Δ T- Δ Z will be just counted down to when phase counts i.e. when next minor synchronous point SYNC0 arrives, now count value can be from Δ
T- Δs Z forces to draw high to Δ T by synchronizing signal, starts the counting in a new cycle again, as shown in fig. 6, occurring two in the absence of continuous
Secondary EPWM is interrupted.
Mode 2：For each microprocessor, the value that can set the time reference phase register is 0, and institute
State the periodic quantity T+T' of time reference counter and the periodic quantity T of the synchronizing signal difference >=each microprocessor and reference clock
Between deviation maximum.
Specifically, assume the time reference that the deviation between certain microprocessor and reference clock is Δ Z, the then microprocessor
Counter starts counting up when synchronous point SYNC0 arrives with 0, according to first counting up to the summit of triangular carrier countdown again
Mode cycle count to the bottom point of triangular carrier forms triangular carrier, and next minor synchronous point SYNC0 just successively decreases meter when arriving
T'- Δ Z are counted to, now count value can be pulled down to 0 from T'- Δs Z by synchronizing signal pressure, start the counting in a new cycle again, such as
Shown in Fig. 7, there are EPWM interruptions twice in the absence of continuous.
As seen from the above description, the embodiment of the present invention is based on EtherCAT network structure current transformer parallel operation control system
System, causes synchronizing signal to synchronously arrive at each microprocessor using the clock synchronizing function of EtherCAT network, it is achieved thereby that carrying
Ripple is synchronous.Moreover, the embodiment of the present invention also by rationally set in each microprocessor the value of time reference phase register and when
Between reference counter periodic quantity so that the synchronous point of synchronizing signal always time reference counter count down to triangle carry
Each microprocessor is reached when the bottom point of ripple or before, continuous occurred EPWM twice so as to avoid and is interrupted.
Corresponding with above method embodiment, the embodiment of the invention also discloses a kind of control of current transformer parallel operation to be
System, is described in detail below：
As shown in Fig. 2 the current transformer parallel operation control system include EtherCAT main websites and with each unsteady flow in parallel
Device corresponds the EtherCAT slave stations set；The EtherCAT slave stations are included from station control and with described from station control
Connected microprocessor；The EtherCAT main websites and each EtherCAT slave stations connect into bus-network topological structure；
The microprocessor is used to obtain the feedback data of current transformer, EtherCAT corresponding to write-in from station control,
Read by EtherCAT main websites；
The EtherCAT main websites are used to generate modulating wave and control command according to the feedback data of each current transformer, and write-in is each
EtherCAT is from station control, by corresponding microcomputer reads；
The EtherCAT is used to generate synchronizing signal from station control, is sent to corresponding microprocessor；
The microprocessor is additionally operable to the time reference of itself when rising edge or trailing edge occurs in the synchronizing signal
The value of phase register is loaded into the time reference counter of itself, and the time reference counter starts counting up production from the value
Raw triangular carrier；Wherein, the value of the periodic quantity of the value of the time reference phase register and the time reference counter,
Meet loading the moment always occur in triangular carrier bottom point arrive when or before；
The microprocessor is additionally operable to each EPWM of triggering in the bottom point of triangular carrier and summit arrival and interrupted,
Corresponding actions are performed according to the modulating wave and control command when EPWM is interrupted.
Optionally, the deviation between each microprocessors of value ＞ and reference clock of the time reference phase register is most
Big value；Also, the periodic quantity of the time reference counter is equal to the periodic quantity of the synchronizing signal.
Optionally, the value of the time reference phase register is 0；Also, the periodic quantity of the time reference counter
And the maximum of the deviation of the difference of the periodic quantity of the synchronizing signal >=between each microprocessor and reference clock.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments in the case where not departing from the spirit or scope of the embodiment of the present invention.Therefore,
The embodiment of the present invention is not intended to be limited to the embodiments shown herein, and be to fit to principles disclosed herein and
The consistent most wide scope of features of novelty.
Claims (6)
1. a kind of current transformer parallel operation control method, it is characterised in that described applied to current transformer parallel operation control system
Current transformer parallel operation control system includes EtherCAT main websites and corresponds what is set with each parallel converters
EtherCAT slave stations；The EtherCAT slave stations include from station control and with the microprocessor being connected from station control；
The EtherCAT main websites and each EtherCAT slave stations connect into bus-network topological structure；
The current transformer parallel operation control method includes：
Each microprocessor obtains the feedback data of current transformer, and EtherCAT is from station control corresponding to write-in, by EtherCAT
Main website is read；
EtherCAT main websites generate modulating wave and control command according to the feedback data of each current transformer, write each EtherCAT slave stations
In controller, by corresponding microcomputer reads；
Each EtherCAT generates synchronizing signal from station control, is sent to corresponding microprocessor；
Each microprocessor is when rising edge or trailing edge occurs in the synchronizing signal by the time reference phase register of itself
Value is loaded into the time reference counter of itself, and the time reference counter starts counting up generation triangular carrier from the value；
Wherein, the value of the periodic quantity of the value of the time reference phase register and the time reference counter, when meeting loading
When carving the bottom point arrival for always occurring in triangular carrier or before；
Each microprocessor each EPWM of triggering when the bottom point of triangular carrier and summit are arrived is interrupted, when EPWM interrupts according to
The modulating wave and control command perform corresponding actions.
2. current transformer parallel operation control method according to claim 1, it is characterised in that：
The maximum of deviation between each microprocessors of value ＞ and reference clock of the time reference phase register；
The periodic quantity of the time reference counter is equal to the periodic quantity of the synchronizing signal.
3. current transformer parallel operation control method according to claim 1, it is characterised in that：
The value of the time reference phase register is 0；
When the difference of the periodic quantity of the periodic quantity of the time reference counter and the synchronizing signal >=each microprocessor is with reference
The maximum of deviation between clock.
A kind of 4. current transformer parallel operation control system, it is characterised in that including EtherCAT main websites and with each unsteady flow in parallel
Device corresponds the EtherCAT slave stations set；The EtherCAT slave stations are included from station control and with described from station control
Connected microprocessor；The EtherCAT main websites and each EtherCAT slave stations connect into bus-network topological structure；
The microprocessor is used to obtain the feedback data of current transformer, EtherCAT corresponding to write-in from station control, by
EtherCAT main websites are read；
The EtherCAT main websites are used to generate modulating wave and control command according to the feedback data of each current transformer, and write-in is each
EtherCAT is from station control, by corresponding microcomputer reads；
The EtherCAT is used to generate synchronizing signal from station control, is sent to corresponding microprocessor；
The microprocessor is additionally operable to the time reference phase of itself when rising edge or trailing edge occurs in the synchronizing signal
The value of register is loaded into the time reference counter of itself, and the time reference counter starts counting up generation three from the value
Angle carrier wave；Wherein, the value of the periodic quantity of the value of the time reference phase register and the time reference counter, meet
Loading the moment always occur in triangular carrier bottom point arrive when or before；
The microprocessor is additionally operable to each EPWM of triggering in the bottom point of triangular carrier and summit arrival and interrupted, in EPWM
Corresponding actions are performed according to the modulating wave and control command when disconnected.
5. current transformer parallel operation control system according to claim 4, it is characterised in that：
The maximum of deviation between each microprocessors of value ＞ and reference clock of the time reference phase register；
The periodic quantity of the time reference counter is equal to the periodic quantity of the synchronizing signal.
6. current transformer parallel operation control system according to claim 4, it is characterised in that：
The value of the time reference phase register is 0；
When the difference of the periodic quantity of the periodic quantity of the time reference counter and the synchronizing signal >=each microprocessor is with reference
The maximum of deviation between clock.
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| CN201711104743.3A CN107834817B (en) | 2017-11-10 | 2017-11-10 | Control method and control system for parallel operation of converters |
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| CN201711104743.3A CN107834817B (en) | 2017-11-10 | 2017-11-10 | Control method and control system for parallel operation of converters |
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| CN108539785A (en) * | 2018-04-19 | 2018-09-14 | 先控捷联电气股份有限公司 | Inverter synchronous method and device |
| CN110971557A (en) * | 2019-11-26 | 2020-04-07 | 阳光电源股份有限公司 | Carrier synchronization method and system for parallel operation of multiple converters |
| CN111208784A (en) * | 2020-03-02 | 2020-05-29 | 深圳戴普森新能源技术有限公司 | Motion control system and synchronization method thereof |
| CN111338246A (en) * | 2020-03-02 | 2020-06-26 | 上海电气集团股份有限公司 | High-precision time synchronization control system of wind power converter |
| CN111628571A (en) * | 2020-04-29 | 2020-09-04 | 科华恒盛股份有限公司 | Master-slave-free carrier synchronization method for multi-module system and multi-module carrier synchronization system |
| CN112486112A (en) * | 2020-11-19 | 2021-03-12 | 珠海格力电器股份有限公司 | EtherCAT master station control system and control method thereof |
| CN112637031A (en) * | 2021-01-06 | 2021-04-09 | 广东博智林机器人有限公司 | Calibration method, calibration device and drive control system for slave station control period |
| CN112787637A (en) * | 2021-01-04 | 2021-05-11 | 阳光电源股份有限公司 | Modulation parameter loading method and device, processor and electronic equipment |
| CN113890171A (en) * | 2021-09-28 | 2022-01-04 | 厦门市爱维达电子有限公司 | Method for realizing inversion carrier synchronization of UPS parallel operation system |
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