CN104734839A - Converter and time hack method and system of converter - Google Patents
Converter and time hack method and system of converter Download PDFInfo
- Publication number
- CN104734839A CN104734839A CN201510081612.2A CN201510081612A CN104734839A CN 104734839 A CN104734839 A CN 104734839A CN 201510081612 A CN201510081612 A CN 201510081612A CN 104734839 A CN104734839 A CN 104734839A
- Authority
- CN
- China
- Prior art keywords
- time
- current transformer
- network
- pair
- module
- 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.)
- Pending
Links
Landscapes
- Electric Clocks (AREA)
Abstract
The invention is applicable to the field of communication and provides a converter and a time hack method and system of the converter. The method includes the following steps that the converter is connected with a network clock server through an Internet access; time of the converter and time of the network clock server are synchronized through an NTP. According to the converter and the time hack method and system of the converter, the time of the converter and the time of the network clock server are synchronized through the NTP, time hack is more accurate, and the diagnosis efficiency of faults of the converter is improved.
Description
Technical field
The invention belongs to the communications field, particularly relate to a kind of current transformer and current transformer setting means and system.
Background technology
At present, wind generator system is made up of equipment such as current transformer, master control, case change, blower fans, photovoltaic generating system is made up of equipment such as inverter, master control, case change, solar battery group, no matter wind generator system or photovoltaic generating system, when a kind of device fails, other equipment may be caused to break down simultaneously simultaneously.If the time of these equipment does not keep synchronous, be then not easy the equipment judging to break down at first.All can on-premise network clock server in wind energy turbine set, for the equipment in wind generator system provides accurate clock.
Current transformer (inverter), as a kind of equipment wherein, has the needs of time synchronized.But in existing current transformer work, as shown in Figure 1, current transformer only separately and Master Communications, so current transformer or synchronous with the respective master control retention time, or runs with the time of self.No matter be any mode, each current transformer does not reach time synchronized with network clocking server, so the time of current transformer is accurate all not.If the time of current transformer is not synchronous, very big inconvenience can be brought to the diagnosis of failure problems and concrete location.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of current transformer setting means and system, is intended to solve problem not accurately of existing current transformer time.
The embodiment of the present invention is achieved in that a kind of current transformer setting means, and described method comprises the steps:
Current transformer and network clocking server are connected by network interface;
Current transformer is by agreement during NTP couple and described network clocking server sync time.
Further, described current transformer and network clocking server sync time comprise:
Contrast the time of described current transformer and network clocking server;
When the Time Inconsistency of described current transformer and network clocking server, adjust the clock of described current transformer, make the time of current transformer and the time consistency of network clocking server.
After the very first time of presetting, return the time that step contrasts described current transformer and network clocking server.
The present invention also proposes a kind of current transformer, comprising:
Link block, for connecting by network interface with network clocking server;
Synchronization module, for by agreement during NTP couple and described network clocking server sync time.
Further, described synchronization module comprises:
Contrast unit, for contrasting the time of described current transformer and network clocking server;
Adjustment unit, for when the Time Inconsistency of described current transformer and network clocking server, adjusts the clock of described current transformer, makes the time of current transformer and the time consistency of network clocking server.
Cycling element, for after the very first time of presetting, returns the time that step contrasts described current transformer and network clocking server.
System when the present invention also proposes a kind of current transformer pair, multiple current transformers that described system comprises network clocking server, is connected with described network clocking server, wherein, described current transformer comprises:
Link block, for connecting by network interface with network clocking server;
Synchronization module, for by agreement during NTP couple and described network clocking server sync time.
Further, described synchronization module comprises:
Contrast unit, for contrasting the time of described current transformer and network clocking server;
Adjustment unit, for when the Time Inconsistency of described current transformer and network clocking server, adjusts the clock of described current transformer, makes the time of current transformer and the time consistency of network clocking server.
Cycling element, for after the very first time of presetting, returns the time that step contrasts described current transformer and network clocking server.
The present invention also proposes a kind of current transformer setting means, and described method comprises the steps:
Current transformer by pair time the network interface of module and network clocking server connect;
Pair time module according to agreement self time of adjustment when the time of network clocking server and NTP couple;
Pair time module issue self time to current transformer, for the time of current transformer adjustment self.
Further, the time for current transformer adjustment self comprises to current transformer the time that when described pair, module issues self:
Pair time module the time of self is added network delay, obtain the time to be issued; The communication time of module and current transformer when described network delay is pair;
Time described to be issued is issued to current transformer.
System when the present invention also proposes a kind of current transformer pair, described system comprise at least one current transformer, pair time module and network clocking server, wherein,
Described current transformer, for by pair time the network interface of module and network clocking server connect;
Module when described pair, for the time according to agreement adjustment when time of network clocking server and NTP couple self; And the time issuing self is to current transformer, for the time of current transformer adjustment self.
Further, described pair time module comprise:
Computing unit, for the time of self is added network delay, obtains the time to be issued; The communication time of module and current transformer when described network delay is pair;
Transmitting element, for being issued to current transformer by the time described to be issued.
The current transformer of the embodiment of the present invention carries out time synchronized by agreement during NTP couple and network clocking server, more accurate when to make pair, improves the diagnosis efficiency of current transformer fault.
Accompanying drawing explanation
The Organization Chart of system when Fig. 1 is current transformer pair in prior art;
Fig. 2 is the flow chart of the current transformer setting means that the embodiment of the present invention one provides;
Fig. 3 is the structure chart of the current transformer that the embodiment of the present invention two provides;
Fig. 4 is the structure chart of synchronization module in the current transformer that provides of the embodiment of the present invention two;
Fig. 5 be the embodiment of the present invention three provide current transformer pair time system structure chart;
Fig. 6 is the flow chart of the current transformer setting means that the embodiment of the present invention four provides;
Fig. 7 be the embodiment of the present invention five provide current transformer pair time system structure chart;
Fig. 8 be the embodiment of the present invention five provide current transformer pair time system in pair time module structure chart.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
embodiment one
The embodiment of the present invention one proposes a kind of current transformer setting means.As shown in Figure 2, the method for the embodiment of the present invention one comprises the steps:
S11, current transformer and network clocking server are connected by network interface.The current transformer of the embodiment of the present invention one generally includes processor and network interface, and processor and network interface can be arranged on same veneer.Agreement when processor is used for realizing NTP couple can be the processors such as DSP or ARM, and network interface is used for establishing a communications link with the network interface of network clocking server.
S12, current transformer are by agreement during NTP couple and network clocking server sync time.
After network interface and the network clocking server of current transformer is set up and is communicated, the processor of current transformer calls NTPD program (network time synchronization program), after NTPD program and network clocking server are set up and are communicated, the time of automatic contrast current transformer and the time of network clocking server, when both inconsistent life period differences, by adjusting the clock coefficient of current transformer, the time of the time of current transformer and network clocking server is consistent, and then the time synchronized completed between current transformer and network clocking server, and the time of current transformer and the time of network clocking server is again contrasted after the very first time T1 preset.
As the prioritization scheme of step S2.A threshold value second time T2 can be set as 100ms, the time difference between current transformer and network clocking server is when being less than 100ms, think the time synchronized of current transformer and network clocking server, wait for that very first time T1 (adjusts T1 value automatically according to error size, larger T1 is less for error, less T1 is larger for error) after again contrast the time of current transformer and the time of network clocking server, circulate with this.The time difference between current transformer and network clocking server is when being more than or equal to 100ms, think the time irreversibility of current transformer and network clocking server, by adjusting the clock coefficient of current transformer, the time of the time of current transformer and network clocking server is consistent, then again contrast the time of current transformer and the time of network clocking server after waiting for very first time T1, circulate with this.
The current transformer of the embodiment of the present invention one carries out time synchronized by agreement during NTP couple and network clocking server, more accurate when to make pair, improves the diagnosis efficiency of current transformer fault.
embodiment two
The embodiment of the present invention two proposes a kind of current transformer, and as shown in Figure 3, current transformer comprises:
Link block 11, for connecting by network interface with network clocking server;
Synchronization module 12, for by agreement during NTP couple and network clocking server sync time.
As shown in Figure 4, synchronization module 12 comprises:
Contrast unit 111, for contrasting the time of current transformer and network clocking server;
Adjustment unit 112, for when the Time Inconsistency of current transformer and network clocking server, the clock system of adjustment current transformer, makes the time of current transformer and the time consistency of network clocking server.
Cycling element 113, for after the very first time of presetting, returns the time that contrast unit 111 contrasts current transformer and network clocking server.
The synchronization module 12 of the embodiment of the present invention two can be processor (agreement when processor is used for realizing NTP couple of current transformer, as processors such as DSP or ARM), current transformer also comprises network interface, processor and network interface and can be arranged on same veneer, and network interface is used for establishing a communications link with the network interface of network clocking server.
After network interface and the network clocking server of current transformer is set up and is communicated, the processor of current transformer calls NTPD program (network time synchronization program), after NTPD program and network clocking server are set up and are communicated, the contrast unit 111 contrast time of current transformer and the time of network clocking server automatically, when both life period differences, adjustment unit 112 is by the clock coefficient of adjustment current transformer, the time of the time of current transformer and network clocking server is consistent, and then the time synchronized completed between current transformer and network clocking server, cycling element 113 again returns contrast unit 111 and contrasts the time of current transformer and the time of network clocking server after the very first time T1 preset.
As prioritization scheme.A threshold value second time T2 can be set as 100ms, the time difference between current transformer and network clocking server is when being less than 100ms, think the time synchronized of current transformer and network clocking server, cycling element 113 waits for that very first time T1 (adjusts T1 value automatically according to error size, larger T1 is less for error, less T1 is larger for error) after again return contrast unit 111 contrast the time of current transformer and the time of network clocking server, circulate with this.The time difference between current transformer and network clocking server is when being more than or equal to 100ms, think the time irreversibility of current transformer and network clocking server, adjustment unit 112, by the clock coefficient of adjustment current transformer, makes the time of the time of current transformer and network clocking server be consistent.
The system of the embodiment of the present invention two makes current transformer carry out time synchronized by agreement during NTP couple and network clocking server 12, more accurate when to make pair, improves the diagnosis efficiency of current transformer fault.
embodiment three
The system when embodiment of the present invention three proposes a kind of current transformer pair.As shown in Figure 5, the system of the embodiment of the present invention three comprises two or more current transformer 31 and network clocking servers 32, each current transformer 31 carries out network service respectively by network interface and network clocking server 32, or multiple current transformer 31 carries out network service with network clocking server 32 after networking (as passed through switch).By the way, the time of the multiple current transformers 31 in wind energy turbine set can be made to carry out synchronously.
The current transformer 31 of the embodiment of the present invention three, shownschematically current transformer is similar for its structure and operation principle and Fig. 3, repeats no more herein.
embodiment four
The embodiment of the present invention four proposes a kind of current transformer setting means.The embodiment of the present invention four is module when current transformer outer setting a pair, pair time module comprise can with the processor of network clocking server communication, current transformer with pair time module communication be connected, pair time module processor agreement when being connected to realize NTP couple with network clocking server communication by network interface again.When pair time the time of module and the time consistency of network clocking server after, then this time is issued to current transformer, make the time of current transformer with pair time module time consistency, thus realize the time synchronized of current transformer and network clocking server.
In the embodiment of the present invention four, pair time module comprise processor, communication interface and network interface.Wherein, pair agreement when the processor of module is used for realizing NTP couple time; Communication interface is used for being connected with the communication interface of current transformer, and communication interface comprises (being not limited thereto) such as universal serial port, CAN, RS485, optical fiber; Network interface is used for realizing network service with network clocking server.
As shown in Figure 6, the method for the embodiment of the present invention four comprises step:
S41, current transformer by pair time the network interface of module and network clocking server connect.
By pair time the communication interface of module be connected by modes such as optical fiber, RS485 buses with the communication interface of current transformer, by pair time the network interface of module and the network interface of network clocking server connect.
For pair time module for network adapter, network adapter is established a communications link by serial ports and current transformer, and network adapter is directly established a communications link with network clocking server (being also indirectly connected with network clocking server by network interface couple in router) by network interface.
S42, pair time module according to agreement self time of adjustment when the time of network clocking server and NTP couple
Pair time module such as network adapter be configured by network adapter FTP client FTP parameter, parameter comprises the IP address of network clocking server, the information with current transformer serial communication, as baud rate, position of rest etc.
Network adapter and network clocking server pair time process as follows: by arranging the IP address of network clocking server in network adapter, thus current transformer and network clocking server are realized network interconnection, after the NTPD program of network adapter and the NTPD program of network clocking server are set up and are communicated, automatically periodically carry out time calibration according to network time synchronization agreement, concrete grammar is consistent with the step S2 of the embodiment of the present invention one.
S43, pair time module issue self time to current transformer, for the time of current transformer adjustment self
Pair time after module and current transformer set up and communicate, periodically from current transformer acquisition time, then to the system time of module during comparison and the time of current transformer.When both life period differences, then by pair time module system time setting in current transformer, make current transformer with pair time the module retention time synchronous, and pair time module be consistent with network clocking server, thus current transformer is synchronous with the network clocking server retention time.
Further, more accurate during for making current transformer pair, can will pair time module (as network adapter or third party's monitoring software) set of time to current transformer time before, by pair time module time add network delay, this network delay be current transformer and pair time module (network adapter) between call duration time, with eliminate that communication delay produces to time error.Such as, network adapter communicates with current transformer with 921600bps, and now communication protocol is 26 bytes, and time precision is microsecond, and communications lag is about 340 microseconds.Pair time module by set of time to current transformer time before, first add network delay, obtain should be synchronous time, and then be issued in current transformer, ensure that the current transformer time is synchronous with it.
The current transformer of the embodiment of the present invention four by pair time module and NTP couple time agreement and network clocking server carry out time synchronized, more accurate when to make pair, improve the diagnosis efficiency of current transformer fault.
embodiment five
The system when embodiment of the present invention five proposes a kind of current transformer pair.As shown in Figure 7, the system of the embodiment of the present invention five comprise at least one current transformer 51, pair time module 52 and network clocking server 53, wherein,
Current transformer 51, for by pair time module 52 and network clocking server 53 connect;
Pair time module 52, for the time according to agreement adjustment when time of network clocking server 53 and NTP couple self; And the time issuing self is to current transformer 51, adjust the time of self for current transformer 51.
As shown in Figure 8, pair time, module 52 comprises:
Computing unit 421, for the time of self is added network delay, obtains the time to be issued; The communication time of module 52 and current transformer 51 when described network delay is pair;
Transmitting element 422, for being issued to current transformer 51 by the time to be issued.
The embodiment of the present invention four is module 52 when current transformer 51 outer setting a pair, pair time module 52 comprise the processor that can communicate with network clocking server 53, current transformer 51 with pair time module 52 communicate to connect, pair time module 52 processor agreement when communicating to connect to realize NTP couple by network interface and network clocking server 53 again.When pair time the time of module 52 and the time consistency of network clocking server 53 after, then this time is issued to current transformer 51, make the time of current transformer 51 with pair time module 52 time consistency, thus realize the time synchronized of current transformer 51 and network clocking server 53.
When above-mentioned computing unit 421 and transmitting element 422 can be arranged at pair module 52 processor in, pair time module 52 also can comprise communication interface and network interface.Wherein, pair agreement when the processor of module 52 is used for realizing NTP couple time; Communication interface is used for being connected with the communication interface of current transformer 51, and communication interface comprises (being not limited thereto) such as universal serial port, CAN, RS485, optical fiber; Network interface is used for realizing network service with network clocking server 53.
Particularly, by pair time the communication interface of module 52 be connected by modes such as optical fiber, RS485 buses with the communication interface of current transformer 51, by pair time the network interface of module 52 and the network interface of network clocking server 53 connect.
For pair time module 52 for network adapter, network adapter is established a communications link by serial ports and current transformer 51, and network adapter is directly established a communications link with network clocking server 53 (being also indirectly connected with network clocking server 53 by network interface couple in router) by network interface.
Pair time module 52 such as network adapter be configured by network adapter FTP client FTP parameter, parameter comprises the IP address of network clocking server 53, the information with current transformer 51 serial communication, as baud rate, position of rest etc.
Network adapter and network clocking server 53 pair time process as follows: by arranging the IP address of network clocking server 53 in network adapter, thus current transformer 51 and network clocking server 53 are realized network interconnection, the NTPD program of network adapter and the NTPD program of network clocking server 53 periodically carry out time calibration according to network time synchronization agreement after setting up and communicating automatically.
Pair time after module 52 and current transformer 51 set up and communicate, periodically from current transformer 51 acquisition time, then to the system time of module during comparison 52 and the time of current transformer 51.When both life period differences, then by pair time module 52 system time setting in current transformer 51, make current transformer 51 with pair time module 52 retention time synchronous, and pair time module 52 be consistent with network clocking server 53, thus current transformer 51 is synchronous with network clocking server 53 retention time.
Further, more accurate during for making 51 pairs, current transformer, can will pair time module 52 (as network adapter or third party's monitoring software) set of time to current transformer time before, computing unit 421 by pair time module 52 time add network delay, this network delay be current transformer 51 and pair time module 52 (network adapter) between call duration time, with eliminate that communication delay produces to time error.Such as, network adapter communicates with current transformer with 921600bps, and now communication protocol is 26 bytes, and time precision is microsecond, and communications lag is about 340 microseconds.Pair time module 52 by set of time to current transformer 51 time before, first add network delay, obtain should be synchronous time, and then be issued in current transformer 51 by transmitting element 422, ensure that current transformer 51 time is synchronous with it.
The system of the embodiment of the present invention four can comprise at least two or more current transformer 51, each current transformer 51 carries out network service respectively by module 52 when respective pair and network clocking server 53, or when multiple pairs, module 52 carries out network service with network clocking server 53 after networking (as passed through switch).By the way, the time of the multiple current transformers 51 in wind energy turbine set can be made to carry out synchronously.
The system of the embodiment of the present invention four by pair time module 52 and NTP couple time agreement and network clocking server 53 carry out time synchronized, more accurate when to make pair, improve the diagnosis efficiency of current transformer 51 fault.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a current transformer setting means, is characterized in that, described method comprises the steps:
Current transformer and network clocking server are connected by network interface;
Current transformer is by agreement during NTP couple and described network clocking server sync time.
2. the method for claim 1, is characterized in that, described current transformer and network clocking server sync time comprise:
Contrast the time of described current transformer and network clocking server;
When the Time Inconsistency of described current transformer and network clocking server, adjust the clock of described current transformer, make the time of current transformer and the time consistency of network clocking server.
After the very first time of presetting, return the time that step contrasts described current transformer and network clocking server.
3. a current transformer, is characterized in that, comprising:
Link block, for connecting by network interface with network clocking server;
Synchronization module, for by agreement during NTP couple and described network clocking server sync time.
4. current transformer as claimed in claim 3, it is characterized in that, described synchronization module comprises:
Contrast unit, for contrasting the time of described current transformer and network clocking server;
Adjustment unit, for when the Time Inconsistency of described current transformer and network clocking server, adjusts the clock of described current transformer, makes the time of current transformer and the time consistency of network clocking server.
Cycling element, for after the very first time of presetting, returns the time that step contrasts described current transformer and network clocking server.
5. system during current transformer pair, is characterized in that, multiple current transformers that described system comprises network clocking server, is connected with described network clocking server, and wherein, described current transformer is the current transformer described in claim 3 or 4.
6. a current transformer setting means, is characterized in that, described method comprises the steps:
Current transformer by pair time the network interface of module and network clocking server connect;
Pair time module according to agreement self time of adjustment when the time of network clocking server and NTP couple;
Pair time module issue self time to current transformer, for the time of current transformer adjustment self.
7. method as claimed in claim 6, is characterized in that, the time that when described pair, module issues self, the time for current transformer adjustment self comprised to current transformer:
Pair time module the time of self is added network delay, obtain the time to be issued; The communication time of module and current transformer when described network delay is pair;
Time described to be issued is issued to current transformer.
8. system during current transformer pair, is characterized in that, described system comprise at least one current transformer, pair time module and network clocking server, wherein,
Described current transformer, for by pair time the network interface of module and network clocking server connect;
Module when described pair, for the time according to agreement adjustment when time of network clocking server and NTP couple self; And the time issuing self is to current transformer, for the time of current transformer adjustment self.
9. system as claimed in claim 8, it is characterized in that, when described pair, module comprises:
Computing unit, for the time of self is added network delay, obtains the time to be issued; The communication time of module and current transformer when described network delay is pair;
Transmitting element, for being issued to current transformer by the time described to be issued.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081612.2A CN104734839A (en) | 2015-02-13 | 2015-02-13 | Converter and time hack method and system of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081612.2A CN104734839A (en) | 2015-02-13 | 2015-02-13 | Converter and time hack method and system of converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104734839A true CN104734839A (en) | 2015-06-24 |
Family
ID=53458305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510081612.2A Pending CN104734839A (en) | 2015-02-13 | 2015-02-13 | Converter and time hack method and system of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104734839A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541031A (en) * | 2012-02-10 | 2012-07-04 | 四川钟顺太阳能开发有限公司 | Fieldbus-based large tracking photovoltaic plant distributed control system and control method thereof |
| WO2015007872A1 (en) * | 2013-07-19 | 2015-01-22 | Sma Solar Technology Ag | Inverter comprising at least two direct current inputs, a photovoltaic installation comprising such an inverter, and a method for actuating an inverter |
-
2015
- 2015-02-13 CN CN201510081612.2A patent/CN104734839A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541031A (en) * | 2012-02-10 | 2012-07-04 | 四川钟顺太阳能开发有限公司 | Fieldbus-based large tracking photovoltaic plant distributed control system and control method thereof |
| WO2015007872A1 (en) * | 2013-07-19 | 2015-01-22 | Sma Solar Technology Ag | Inverter comprising at least two direct current inputs, a photovoltaic installation comprising such an inverter, and a method for actuating an inverter |
Non-Patent Citations (2)
| Title |
|---|
| 宋妍 等: "基于NTP的网络时间服务系统的研究", 《计算机工程与应用》 * |
| 谢宝云: "解析NTP在电力自动化设备时钟同步中的应用", 《科技创新与应用》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113066276B (en) | Communication fault monitoring method and device for electricity consumption information acquisition system and storage medium | |
| CN108737590A (en) | A kind of method that address is distributed automatically, system, Modbus main websites, Modbus slave stations | |
| CN204046641U (en) | A kind of Secure isolation gateway supporting multi-protocol data acquisition | |
| WO2020109867A3 (en) | Multi-mode communication device, method and system | |
| CN106850271B (en) | Power distribution master station and terminal communication network fault studying and judging method | |
| CN109347861B (en) | Communication method of real-time dynamic monitoring system | |
| CN107995019B (en) | Method and system for remote debugging and maintaining network equipment based on virtual link | |
| CN111565073A (en) | Wireless optical difference synchronization method and system based on 5G communication | |
| CN110798276A (en) | Time synchronization method and system for SDN (software defined network) of intelligent substation | |
| CN104636986A (en) | Dispatching remote safety remote control checking method based on service | |
| CN103997533B (en) | A kind of dynamic terminal long-distance maintenance method based on wireless network | |
| CN104301176A (en) | System and method for testing multiple ONU devices | |
| CN104065935A (en) | Automatic time synchronization system for transformer substation video monitoring mainframe and time synchronization method thereof | |
| CN105703944A (en) | Comprehensive simulation method of power grid and communication network | |
| CN104505942A (en) | Power distribution automatic feeder terminal based on data bus and network thereof | |
| CN104104644A (en) | Bidirectional forwarding detection system and detection time configuration method of bidirectional forwarding detection | |
| CN102917284A (en) | Precise clock synchronization method based on PON (Passive Optical Network) system | |
| CN108666990A (en) | A kind of power grid differential protecting method and system | |
| CN104734839A (en) | Converter and time hack method and system of converter | |
| CN111601189A (en) | Accurate time synchronization method and system applied to cable distance measuring device | |
| CN104022515B (en) | Reactive compensation cabinet and the control method of reactive compensation unit | |
| CN110234090A (en) | A kind of data management cloud platform based on LoRa | |
| CN213126054U (en) | Clock synchronization device and system | |
| CN103441509A (en) | Reactive power compensation cabinet and control method | |
| CN110430157B (en) | System and method for remotely operating and maintaining speed regulator of water turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150624 |