CN105244993B - A kind of uninterruptible power supply combining system Fast synchronization locking phase control method - Google Patents
A kind of uninterruptible power supply combining system Fast synchronization locking phase control method Download PDFInfo
- Publication number
- CN105244993B CN105244993B CN201510582379.6A CN201510582379A CN105244993B CN 105244993 B CN105244993 B CN 105244993B CN 201510582379 A CN201510582379 A CN 201510582379A CN 105244993 B CN105244993 B CN 105244993B
- Authority
- CN
- China
- Prior art keywords
- phase
- pulse
- lock
- frequency
- out pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
The present invention provides a kind of uninterruptible power supply combining system Fast synchronization locking phase control method, the Fast synchronization locking phase control method includes capturing unit, phase region judging unit, phase locking unit, lock-out pulse transmission unit.Wherein：The capturing unit is for capturing lock-out pulse on synchronous bus；The phase region judging unit distinguishes the section where locking phase for the pulse width according to capture；The phase locking unit, it is for the pulse information according to capture, inverter output voltage PGC demodulation is consistent with lock-out pulse phase；The lock-out pulse transmission unit, for obtaining and after owner's identity, lock-out pulse being sent on synchronous bus.The present invention sent by novel lock-out pulse, acquisition mode and software control method, it can be achieved that each single machine of uninterruptible power supply combining system can quickly accurate locking synchronization pulse, improve the stability and reliability of uninterruptible power supply combining system.
Description
Technical field
The present invention relates to uninterruptible power supply fields, quickly same more specifically to a kind of uninterruptible power supply combining system
Walk locking phase control method.
Background technology
When meeting with mains failure, it is ensured that the continuity of power supply, this is that uninterruptible power system is most basic and most heavy
The function of wanting, while it is also equipped with the functions such as voltage stabilizing, frequency stabilization, filtering, anti-electromagnetism and radio frequency interference, anti-voltage surge, Neng Goubao
Demonstrate,prove the power supply supply that computer room load obtains lasting high quality.In today that Intranet application rapidly increases, data center
Importance further enhances --- and what data center was carried is no longer data itself, but the core business of enterprise, reliable
Property be the key that ensure enterprise core business high efficiency operation.It is basis that data center systems, which will keep steady running, power supply, it is ensured that
Also therefore, it has become the focuses of problem for power supply reliability, the stability of uninterruptible power system.
For uninterruptible power supply combining system, one reliability, stability key point of power supply are in combining system
The Phase synchronization problem of each single machine, in combining system, the phase error of very little will likely cause prodigious dash current or circulation,
To cause serious consequence, therefore necessarily the moment keeps the phase strict conformance of each single machine in combining system.
Phase synchronization technology current main-stream between uninterruptible power supply combining system is the original by the way of lock-out pulse
The phase frequency information of output is sent to together by reason for the single machine with simultaneously owner's identity by the characteristic manner of lock-out pulse
It walks in bus, other single machines of combining system, also as slave, the phase of host is calculated according to received lock-out pulse
And frequency information, and as the target phase and target frequency of the machine, single machine is by adjusting the phase and frequency of the machine output voltage
Rate is consistent with target phase and target frequency, realizes the Phase synchronization of each single machine in combining system.
Since the lock-out pulse of host is largely sent according to bypass voltage, when the phase or frequency of bypass voltage
When rate changes, the phase and frequency of corresponding lock-out pulse can also change, in design, if slave can not rapid locking synchronization
The phase and frequency of pulse, in order to ensure the stability and reliability of combining system, then host has to reduce lock-out pulse
Change rate, it is all to ensure to ensure that the slave of combining system can lock upper lock-out pulse when lock-out pulse changes
The phase of machine is consistent.It is this by reduce combining system lock-out pulse rate of change come ensure combining system stability,
Adverse consequences caused by the method for reliability is to will be unable to ensure inversion when bypass supply phase or larger frequency fluctuation
Phase it is consistent with bypass phase, at this point, if uninterruptible power system breaks down, just will appear interruption switching, and be interrupted
The direct result of switching is risk when influencing the quality of output power supply and increasing switching.
Therefore, how to improve the lock-out pulse locking phase rate of combining system is to improve a key of problems.
Invention content
The technical problem to be solved in the present invention is, for lock-out pulse following rate it is relatively low provide it is a kind of new uninterrupted
Power parallel machine system Fast synchronization locking phase control method.
The technical solution that the present invention solves above-mentioned technical problem is to provide a kind of uninterruptible power supply combining system Fast synchronization
Locking phase control method, including capturing unit, phase region judging unit, phase locking unit, lock-out pulse transmission unit, wherein：It is described to catch
Unit is obtained for capturing lock-out pulse on synchronous bus；The phase region judging unit, for the pulse width according to capture, difference
Section where locking phase；The phase locking unit, for the pulse information according to capture, by inverter output voltage PGC demodulation
It is consistent with lock-out pulse phase；The lock-out pulse transmission unit is used for after obtaining simultaneously owner's identity, on synchronous bus
Send lock-out pulse.
In a kind of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention, the capture is single
Member includes rising edge capture subelement and pulsewidth judgment sub-unit, wherein the rising edge captures capture of the subelement via DSP
Mouthful, capture rising edge time；The pulsewidth judgment sub-unit is used to calculate the pulse width between rising edge of a pulse and failing edge.
In a kind of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention, the phase region is sentenced
Disconnected unit determines the phase section residing for next synchronous pulse according to the obtained pulse width of capturing unit.Wherein, synchronous
The different pulse width of pulse corresponds to different phase sections, the lock-out pulse of a power frequency period, by multiple pulse widths
Inconsistent pulse composition, the phase of a corresponding power frequency period can be divided into multiple phase sections.
In a kind of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention, the locking phase list
Member obtains subelement, frequency modulation control subelement and phase modulation including target phase and controls subelement, wherein：The target phase is sought
Subelement seeks out the phase value and frequency values of current time lock-out pulse according to residing phase section；The frequency modulation control
Subelement is calculated using the difference on the frequency of the inversion unit output voltage at current time and lock-out pulse as input using PID control
The frequency that method adjusts inversion unit output voltage is consistent with the frequency of lock-out pulse；The phase modulation controls subelement by inversion unit
The current phase difference of output voltage and lock-out pulse adjusts inversion unit as input, using the virtual phase locked algorithm of PID control
The phase of output voltage is consistent with the object synchronization tracking phase in source.
In a kind of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention, the synchronous arteries and veins
The pulse that punching sends the transmission uniform width not simply in bus characterizes the phase of the machine, frequency information, but by one
Power frequency period is divided into the inconsistent pulse of multiple pulse widths and is sent on synchronous bus, and different pulse widths corresponds to difference
Phase section；And common lock-out pulse does not include phase section information, and a locking phase can only be carried out in a power frequency period
It adjusts, thus can not accomplish quick locking phase, the present invention proposes a power frequency period being divided into multiple phase sections, and slave can root
It is adjusted according to multiple locking phase in one power frequency period of phase and frequency information realization of phase section, to which quick lock in synchronizes arteries and veins
Punching.
A kind of uninterruptible power supply combining system Fast synchronization locking phase control method, includes the following steps：
（a）Capture the pulse width between the rising edge time and lock-out pulse rising edge and failing edge of lock-out pulse.
（b）The phase section residing for next rising edge is sought according to pulse width.
（c）Phase section residing for rising edge time and rising edge, seeks out the phase of current time lock-out pulse
Place value and frequency values, and the target phase value as locking phase and target frequency value；Then the inversion unit of uninterruptible power supply is adjusted
Output voltage, keep the phase of the output voltage consistent with target phase value and frequency values.
（d）If the machine is host, the lock-out pulse of characterization the machine phase and frequency information is sent on synchronous bus.
In a kind of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention, the step
（a）Including：
Rising edge time can accurately be obtained by the trapping module of DSP, and from being started counting up at the time of capturing rising edge, directly
To capturing cut-off at the time of failing edge occurs.
In a kind of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention, the step
（b）Including：
When the count value occurred to failing edge by the rising edge captured can be confirmed that next synchronous pulse occurs, institute
Corresponding phase section.
In a kind of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention, the step
（c）Including：
According to moment caused by rising edge and the phase section corresponding to rising edge, you can to confirm that rising edge generates
At the time of corresponding lock-out pulse phase, meanwhile, can be according to phase change rate and same arteries and veins in upper power frequency synchronizing cycle
The frequency of lock-out pulse is sought out at the time of punching corresponding to the rising edge of a pulse of width.And by striked lock-out pulse phase with
And target phase value and frequency values of the frequency values as inverter output voltage.
According to the inversion unit output voltage at current time and the difference on the frequency of lock-out pulse, adjusted using pid control algorithm
The frequency of inversion unit output voltage is consistent with the frequency of lock-out pulse；
According to the current phase difference of inversion unit output voltage and lock-out pulse, using the virtual phase locked algorithm of PID control
The phase for adjusting inversion unit output voltage is consistent with the object synchronization tracking phase in source
In a kind of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention, the step
（d）Including：：
When the machine is host, the lock-out pulse sent on synchronous bus sends unified width not simply in bus
The pulse of degree characterizes the phase of the machine, frequency information, but a power frequency period is divided into the inconsistent arteries and veins of multiple pulse widths
It rushes at and is sent on synchronous bus, it can be understood as the impulse train of one group of difference pulse width；Different pulse width characterizations is different
Phase section, to realize when slave receives lock-out pulse, can quickly according to the phase of pulse information positioning host and
Frequency information.Common lock-out pulse does not include phase section information, and a locking phase can only be carried out in a power frequency period and is adjusted,
Thus it can not accomplish quick locking phase.And in a power frequency period provided by the invention one group of difference pulse width pulse pocket transmission
One power frequency period is divided into multiple phase sections by mode, thus slave can be real according to the phase and frequency information of phase section
Repeatedly locking phase is adjusted in an existing power frequency period, to more quick locking synchronization pulse.
Description of the drawings
Fig. 1 is a kind of signal of uninterruptible power supply combining system Fast synchronization locking phase control method first embodiment of the present invention
Figure.
Fig. 2 is a kind of lock-out pulse pocket transmission of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention
With the schematic diagram for receiving specific embodiment.
Fig. 3 is a kind of flow diagram of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, being that a kind of uninterruptible power supply combining system Fast synchronization locking phase control method first of the present invention is implemented
The schematic diagram of example, using Fast synchronization locking phase control method of the present invention.Uninterruptible power supply combining system in the present embodiment
Genlock include capturing unit 11, phase region judging unit 12, genlock unit 13 and lock-out pulse transmission unit 14.
Master synchronization pulse transmission unit 14 institute of the capturing unit 11 for the combining system on detecting real-time synchronous bus
The lock-out pulse of transmission.The section that the result captured carries out phase for phase region judging unit 12 judges, and judges with phase region
The judging result of unit 12 is used for the lock-out pulse phase angle and frequency that genlock unit 13 calculates current time together.
The mesh at current time is calculated according to capturing unit 11, the result of phase region judging unit 12 in genlock unit 13
After marking phase and target frequency value, completed to target phase and target frequency by frequency modulation subelement, phase modulation subelement
Locking, to realize that slave phase keeps strict conformance with host phase.
Lock-out pulse transmission unit 14 only when this one-of-a-kind system is the host of combining system, just executes.Lock-out pulse is sent out
It send unit to be sent according to the phase of host, the impulse train of multiple and different pulse widths will be sent in a power frequency period.
As shown in Fig. 2, for a kind of synchronization arteries and veins of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention
It rushes pocket transmission and receives specific embodiment.
The phase that host will be sent to a power frequency period on synchronous bus is divided into 3 sections, as shown in the table：
| Phase section（Degree） | Pulse width（Degree） | Zone id | Rising edge captures the moment |
| 0-30 | 30 | a | 1 |
| 60-120 | 60 | b | 2 |
| 180-300 | 120 | c | 3 |
According to the 1st rising edge capture and the calculating of pulse width, it has been confirmed that pulse next time will be in area
Section b, i.e. the phase section of 60-120 degree, then when the rising edge of the 2nd subsynchronous pulse captures, you can think lock-out pulse this
When phase be 60 degree, meanwhile, after capturing rising edge, can pulse-width counted, until failing edge capture after section
Only.According to the pulse width counting to the 2nd time, it has been confirmed that pulse next time will be in section c, the i.e. phase of 180-300 degree
Position section, then when the rising edge of the 3rd subsynchronous pulse captures, you can think that the phase of lock-out pulse at this time is 180 degree, according to
This analogizes.As it can be seen that lock-out pulse using the present invention is sent and processing mode is, it can be achieved that 3 locking phase tune in a power frequency period
Section greatly improves locking phase number compared to the mode that common one power frequency period of genlock only 1 locking phase is adjusted,
Phase and frequency can be modified within the shorter time, accomplish quick lock in lock-out pulse.
As shown in figure 3, in a kind of embodiment of uninterruptible power supply combining system Fast synchronization locking phase control method of the present invention
In, include the following steps：
Step S31：Capture the rising edge time of pulse and the width of pulse.Specifically, can be real by the capture mouth of DSP
The capture of existing rising edge, and the failing edge time difference, pulse width can be calculated by calculating the rising edge captured.
Step S32：According to the pulse width of this subpulse, the section residing for next pulse can be confirmed.
Step S33：Pulse section and this rising edge of a pulse captured moment residing for this subpulse synchronize
Locking phase.In this step, following steps be may particularly include：
According to phase section of rising edge at the time of captured and corresponding to this subpulse, you can to confirm that rising edge is caught
Corresponding lock-out pulse phase at the time of obtaining, meanwhile, it can be same according to phase change rate and in upper power frequency synchronizing cycle
The frequency of lock-out pulse is sought out at the time of corresponding to the rising edge of a pulse of pulse width.And by striked lock-out pulse phase
And target phase value and frequency values of the frequency values as inverter output voltage.
According to the inversion unit output voltage at current time and the difference on the frequency of lock-out pulse, adjusted using pid control algorithm
The frequency of inversion unit output voltage is consistent with the frequency of lock-out pulse；
According to the current phase difference of inversion unit output voltage and lock-out pulse, using the virtual phase locked algorithm of PID control
The phase for adjusting inversion unit output voltage is consistent with the object synchronization tracking phase in source according to inversion unit output voltage and same
The difference on the frequency for walking tracking source adjusts the frequency of inversion unit output voltage using ratio control algolithm and object synchronization tracks source
Frequency is consistent；
Step S34：If single machine is the host of combining system, according to phase information, sends and synchronize on synchronous bus
Impulse train.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
Subject to.
Claims (9)
1. a kind of uninterruptible power supply combining system Fast synchronization locking phase control system, it is characterised in that：Including capturing unit, phase region
Judging unit, phase locking unit, lock-out pulse transmission unit, wherein：The capturing unit is for capturing synchronous arteries and veins on synchronous bus
Punching；The phase region judging unit distinguishes the section where locking phase for the pulse width according to capture；The phase region is sentenced
Disconnected unit determines that the phase section residing for next synchronous pulse, feature exist according to the obtained pulse width of capturing unit
In：Different pulse widths corresponds to different phase sections, the lock-out pulse of a power frequency period, by multiple pulse widths
Inconsistent pulse composition, the phase of a corresponding power frequency period are divided into multiple phase sections；The phase locking unit is used for root
It is according to the pulse information of capture, inverter output voltage PGC demodulation is consistent with lock-out pulse phase；The lock-out pulse sends single
Member, for obtaining and after owner's identity, lock-out pulse being sent on synchronous bus.
2. a kind of uninterruptible power supply combining system Fast synchronization locking phase control system according to claim 1, feature exist
In：The capturing unit includes rising edge capture subelement and pulsewidth judgment sub-unit, wherein the rising edge captures subelement
Via the capture mouth of DSP, rising edge time is captured；The pulsewidth judgment sub-unit for calculate rising edge of a pulse and failing edge it
Between pulse width.
3. a kind of uninterruptible power supply combining system Fast synchronization locking phase control system according to claim 1, feature exist
In：The phase locking unit include target phase seek subelement, frequency modulation control subelement and phase modulation control subelement, wherein：Institute
It states target phase and seeks subelement according to residing phase section, seek out the phase value and frequency of current time lock-out pulse
Value；The frequency modulation control subelement using the difference on the frequency of the inversion unit output voltage at current time and lock-out pulse as input,
And the frequency that inversion unit output voltage is adjusted using pid control algorithm is consistent with the frequency of lock-out pulse；The phase modulation control
Subelement is using the current phase difference of inversion unit output voltage and lock-out pulse as input, using the virtual locking phase of PID control
The phase that algorithm adjusts inversion unit output voltage is consistent with the object synchronization tracking phase in source.
4. a kind of uninterruptible power supply combining system Fast synchronization locking phase control system according to claim 1, feature exist
In：The lock-out pulse transmission unit is not that the pulse of the transmission uniform width simply in bus characterizes the phase of the machine, frequency
Rate information, but a power frequency period is divided into the inconsistent pulse of multiple pulse widths and is sent on synchronous bus, it is different
Pulse width corresponds to different phase sections；And common lock-out pulse does not include phase section information, a power frequency period
It is interior to carry out a locking phase adjusting, thus can not accomplish quick locking phase, a power frequency period is divided into multiple phase sections,
Slave is adjusted according to multiple locking phase in one power frequency period of phase and frequency information realization of phase section, to which quick lock in is same
Pace pulse.
5. a kind of uninterruptible power supply combining system Fast synchronization locking phase control method, it is characterised in that：Include the following steps：
（a）Capture the pulse width between the rising edge time and lock-out pulse rising edge and failing edge of lock-out pulse；
（b）The phase section residing for next pulse is sought according to pulse width；
（c）Phase section residing for rising edge time and rising edge, seeks out the phase value of current time lock-out pulse
And frequency values, target phase value and frequency values as single machine；Then the output voltage of the inversion unit of uninterruptible power supply is adjusted
Phase, the phase for making the output voltage is consistent with the phase and frequency of lock-out pulse；
（d）If the machine is host, the lock-out pulse group of characterization the machine phase and frequency information is sent on synchronous bus.
6. a kind of uninterruptible power supply combining system Fast synchronization locking phase control method according to claim 5, feature exist
In：The step（a）Including：
Rising edge time is accurately obtained by the trapping module of DSP, and from being started counting up at the time of capturing rising edge, until capture
Cut-off at the time of appearance to failing edge.
7. a kind of uninterruptible power supply combining system Fast synchronization locking phase control method according to claim 5, feature exist
In：The step（b）Including：
When the count value occurred by rising edge to the failing edge captured confirms that next synchronous pulse occurs, corresponding phase
Position section.
8. a kind of uninterruptible power supply combining system Fast synchronization locking phase control method according to claim 5, feature exist
In：The step（c）Including：
According to moment caused by rising edge and the phase section corresponding to rising edge, that is, confirm that rising edge generates at the time of institute
Corresponding lock-out pulse phase, meanwhile, with the arteries and veins of pulse width according to phase change rate and in upper power frequency synchronizing cycle
The frequency of lock-out pulse is sought out at the time of punching corresponding to rising edge, and striked lock-out pulse phase and frequency values are made
For the target phase value and target frequency value of inverter output voltage；
According to the inversion unit output voltage at current time and the difference on the frequency of lock-out pulse, inversion is adjusted using pid control algorithm
The frequency of unit output voltage is consistent with target frequency；
According to the current phase difference of inversion unit output voltage and lock-out pulse, adjusted using the virtual phase locked algorithm of PID control
The phase of inversion unit output voltage is consistent with target phase.
9. a kind of uninterruptible power supply combining system Fast synchronization locking phase control method according to claim 5, feature exist
In：The step（d）Including：
When the machine is host, the lock-out pulse sent on synchronous bus is not that uniform width is sent simply in bus
Pulse characterizes the phase of the machine, frequency information, but by a power frequency period be divided into the inconsistent pulse of multiple pulse widths to
It is sent on synchronous bus, different pulse widths characterizes different phase sections；Such a power frequency period will be divided into more
A phase section, slave can realize that multiple locking phase is adjusted in a power frequency period according to the phase and frequency information of phase section,
To quick lock in lock-out pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510582379.6A CN105244993B (en) | 2015-09-15 | 2015-09-15 | A kind of uninterruptible power supply combining system Fast synchronization locking phase control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510582379.6A CN105244993B (en) | 2015-09-15 | 2015-09-15 | A kind of uninterruptible power supply combining system Fast synchronization locking phase control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105244993A CN105244993A (en) | 2016-01-13 |
| CN105244993B true CN105244993B (en) | 2018-10-16 |
Family
ID=55042524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510582379.6A Expired - Fee Related CN105244993B (en) | 2015-09-15 | 2015-09-15 | A kind of uninterruptible power supply combining system Fast synchronization locking phase control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105244993B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994896B (en) * | 2017-11-07 | 2021-05-25 | 湖北三江航天万峰科技发展有限公司 | Multi-channel high-speed pulse counting system and counting method |
| CN108650068B (en) * | 2018-03-26 | 2022-06-21 | 深圳市伊力科电源有限公司 | Synchronous signal transmission method and system for parallel operation of uninterruptible power supplies |
| CN108539785B (en) * | 2018-04-19 | 2021-04-23 | 先控捷联电气股份有限公司 | Inverter synchronization method and device |
| CN111355269B (en) * | 2020-03-16 | 2023-09-12 | 国网江苏电力设计咨询有限公司 | Multi-converter control method based on synchronous pulse |
| CN111711224B (en) * | 2020-05-20 | 2023-05-26 | 深圳科士达科技股份有限公司 | Synchronous processing method for output voltage and carrier signal when AC power supplies are connected in parallel |
| CN112072706A (en) * | 2020-09-08 | 2020-12-11 | 湖南理工学院 | Inverter parallel operation synchronous phase locking method |
| CN113495514B (en) * | 2021-07-15 | 2022-11-11 | 厦门爱维达科技工程有限公司 | Output phase synchronization tracking control method applied to UPS parallel operation system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2888741Y (en) * | 2005-09-19 | 2007-04-11 | 珠海泰坦科技股份有限公司 | Power supply control system for non-master parallel operation of inverter |
| CN101777785A (en) * | 2010-03-24 | 2010-07-14 | 胡继业 | Uninterrupted power supply (UPS) electricity separating system and electricity separating method based on dynamic environment monitoring |
| CN102801403A (en) * | 2011-05-24 | 2012-11-28 | 中兴通讯股份有限公司 | Synchronous phase locking method for power supply and power supply |
-
2015
- 2015-09-15 CN CN201510582379.6A patent/CN105244993B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2888741Y (en) * | 2005-09-19 | 2007-04-11 | 珠海泰坦科技股份有限公司 | Power supply control system for non-master parallel operation of inverter |
| CN101777785A (en) * | 2010-03-24 | 2010-07-14 | 胡继业 | Uninterrupted power supply (UPS) electricity separating system and electricity separating method based on dynamic environment monitoring |
| CN102801403A (en) * | 2011-05-24 | 2012-11-28 | 中兴通讯股份有限公司 | Synchronous phase locking method for power supply and power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105244993A (en) | 2016-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105244993B (en) | A kind of uninterruptible power supply combining system Fast synchronization locking phase control method | |
| EP2787664B1 (en) | Time synchronization method and apparatus | |
| US20120218792A1 (en) | Digital phase adjustment for multi-phase power converters | |
| CN104567165B (en) | Method and device for controlling opening of electronic expansion valve | |
| WO2012071552A3 (en) | System and method for access control and identity management | |
| US10666417B1 (en) | Time synchronization using timestamp exchanges | |
| JP5914777B2 (en) | Method for automatically correcting compressor torque, apparatus, compressor and control method thereof | |
| CN103763458B (en) | A kind of scene-change detecting method and device | |
| US9167545B2 (en) | Receiver, method of calculating time difference, and program | |
| CN110730449B (en) | Wireless sensor network communication method and system based on multiple block chains | |
| US10739757B2 (en) | Servo system and servo system control method | |
| CA3126983A1 (en) | Real-time validation of distributed energy resource device commitments | |
| CN101989863B (en) | Rapid frequency deviation tracking device and method | |
| CN111711224B (en) | Synchronous processing method for output voltage and carrier signal when AC power supplies are connected in parallel | |
| ES2875016T3 (en) | Synchronization system for an electrical generating unit and associated method | |
| CN112072706A (en) | Inverter parallel operation synchronous phase locking method | |
| EP2959629A1 (en) | Method and apparatus for data aided timing recovery in 10gbase-t system | |
| CN107547160A (en) | A kind of method for synchronizing time and device | |
| CN106331596B (en) | Household monitoring method and system | |
| CN104253665B (en) | Synchronizer and the synchronization system comprising the equipment | |
| CN105591892A (en) | Graceful Restart (GR) process starting method and device | |
| CN111102689A (en) | Method and device for adjusting clock synchronization | |
| CN105897394A (en) | Method and device for synchronous adjustment of clocks | |
| CN104980184A (en) | Method and equipment for cell search of TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system | |
| CN108539785B (en) | Inverter synchronization method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181016 Termination date: 20200915 |