CN110875758A - Medium-voltage carrier communication system applied to distribution network automation - Google Patents
Medium-voltage carrier communication system applied to distribution network automation Download PDFInfo
- Publication number
- CN110875758A CN110875758A CN201811034572.6A CN201811034572A CN110875758A CN 110875758 A CN110875758 A CN 110875758A CN 201811034572 A CN201811034572 A CN 201811034572A CN 110875758 A CN110875758 A CN 110875758A
- Authority
- CN
- China
- Prior art keywords
- communication
- communication module
- distribution network
- medium
- voltage
- 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.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/544—Setting up communications; Call and signalling arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Optical Communication System (AREA)
Abstract
A medium-voltage carrier communication system applied to distribution network automation comprises a medium-voltage communication manager, a main communication module, a slave communication module and coupling equipment. The medium-voltage carrier communication adopts a master-slave mode, a master communication module is installed at a master node, and slave communication modules are installed at a plurality of slave nodes on the same line. The medium-voltage communication management machine is connected with the main communication module, the main communication module is connected with the coupling equipment, the auxiliary communication module is connected with the coupling equipment and the distribution network terminal, the coupling equipment is respectively arranged at the installation sides of the main communication module and the auxiliary communication module, and the coupling equipment is connected with the distribution network terminal through the existing distribution line. The invention can rely on the existing medium-voltage distribution line as a transmission channel, does not need to erect a new communication line again, makes the existing distribution line fully utilized, can solve the problem that the distribution network terminal and the distribution network master station which do not cover the optical fiber communication area can not communicate, and can provide a high-efficiency, stable and safe communication channel.
Description
Technical Field
The invention relates to the field of distribution network automation systems, in particular to a medium-voltage carrier communication system applied to distribution network automation.
Background
Currently, there are three types of overhead lines, cable (underground) lines, and overhead cable hybrid lines in a 10kV medium voltage distribution network. The distribution network automation terminal mainly comprises an FTU, a DTU, a TTU, a fault indicator and the like. The distribution network automation terminal is applied to different distribution network lines, completes the functions of remote signaling, remote measurement, remote control, fault recording, fault judgment and the like of the lines, communicates with the distribution automation master station in real time, and realizes an automation system of the distribution network.
In a distribution network automation system, communication transmission data between a distribution network terminal and a distribution network main station mainly adopts two modes of an optical fiber private network and a wireless public network. However, both of these communication approaches expose some drawbacks and deficiencies in network automation implementations. Optical fiber communication needs laying optical cables and installing optical communication equipment, so that the construction quantity is large, the construction cost is high, and the maintenance, management and subsequent expansion are difficult. If the optical cable or the reserved communication pipeline is not laid along with capital construction at the distribution network terminal equipment, the optical cable is difficult to be re-excavated in the urban area for laying due to municipal administration limitation, so that the use of optical fiber communication is greatly limited. Although the wireless public network communication is convenient to install and not limited by a transmission channel path, the wireless public network communication has high use cost, frequent updating and upgrading, the problem of congestion in a peak period and the problem of weak or no signal in a remote area, the instantaneity is not easy to guarantee, hidden dangers also exist in reliability and safety, only the distribution network terminal is allowed to realize the two-remote function, and the remote control function cannot be realized. And the optical fiber private network and the wireless public network are difficult to cover the whole distribution network line, and areas with difficult construction and weak wireless signals cannot realize communication in the mode of the optical fiber private network and the wireless public network.
Therefore, it is necessary to develop a communication system applicable to distribution network automation, which can efficiently, stably and safely support the communication requirement of distribution network automation.
Disclosure of Invention
The ballast wave communication system relies on the existing medium-voltage distribution line as a transmission channel, a new communication line does not need to be erected again, the existing distribution line is fully utilized, the problem that a distribution network terminal and a distribution network main station which do not cover an optical fiber communication area cannot communicate can be solved, and an efficient, stable and safe communication channel can be provided.
A medium-voltage carrier communication system applied to distribution network automation comprises a medium-voltage communication manager, a main communication module, a slave communication module and coupling equipment. The medium-voltage carrier communication adopts a master-slave mode, a master communication module is installed at a master node, and slave communication modules are installed at a plurality of slave nodes on the same line. The medium-voltage communication management machine is connected with the main communication module, the main communication module is connected with the coupling equipment, the auxiliary communication module is connected with the coupling equipment and the distribution network terminal, the coupling equipment is respectively arranged at the installation sides of the main communication module and the auxiliary communication module, and the coupling equipment is connected with the distribution network terminal through the existing distribution line.
The medium-voltage communication management machine is used for managing communication between a plurality of downlink slave nodes and a master node, and realizing system parameter configuration, carrier link management, carrier communication scheduling and establishment and maintenance of a neural center linked between a slave terminal and a master station. The optical fiber or the wireless network can be communicated with the upper distribution network main station network.
The main communication module is positioned at the main node, receives the issued data from the medium-voltage communication management machine, converts the data into carrier signals and sends the carrier signals to the distribution lines through the coupling equipment. Meanwhile, the main communication module also monitors the carrier signals from the power distribution line continuously, converts the received carrier signals into data information and sends the data information to the medium-voltage communication management machine. And the execution equipment realizes the conversion between the data information and the carrier signal and realizes the transmission and the reception of the carrier signal.
The slave communication module is positioned at the slave node, is connected with the distribution network terminal, receives the uploaded data from the distribution network terminal, converts the data into a carrier signal, and then sends the carrier signal to the distribution line through the coupling equipment. Meanwhile, the slave communication module also monitors the carrier signals from the power distribution line continuously, converts the received carrier signals into data information and sends the data information to the distribution network terminal. And the execution equipment realizes the conversion between the data information and the carrier signal and realizes the transmission and the reception of the carrier signal.
The coupling device isolates the master and slave communication modules from the high voltage in the medium voltage distribution line and injects a carrier signal into the distribution line. When the distribution line is an overhead line, the coupling equipment injects a carrier signal onto a certain phase power line; when the distribution line is a cable line, the coupling equipment injects the carrier signal into the cable shielding layer.
The method for realizing the communication between the distribution network main station and the distribution network terminal in the distribution network automation of the medium-voltage carrier communication system comprises a distribution network main station communication message issuing process and a distribution network terminal communication message uploading process. The distribution network master station communication message issuing process is as follows: 1) the master station sends the message through optical fiber communication or wireless communication, and the sent message is received by the distribution line medium-voltage communication management machine at the master node. The medium-voltage communication manager has a protocol conversion function, and adds the message to the address of the corresponding slave communication module after conversion. 2) After the message of the slave communication module address is added, the master communication module encodes and modulates the digital information to become a carrier signal, and then the carrier signal is sent to the medium-voltage distribution line for transmission through the coupling equipment. 3) The carrier signal is transmitted along the medium voltage distribution line and is transmitted to the slave communication modules via the coupling devices at the slave nodes. 4) After receiving the carrier signal from the communication module, the slave node demodulates and decodes the carrier signal to become a digital signal, and verifies whether the data is transmitted to the slave node by verifying the address of the slave communication module in the data. And if the addresses are not matched, no response is carried out, and if the addresses are matched, the received data are transmitted to the connected distribution network terminal equipment through the data interface. And the distribution network terminal equipment receives the message sent by the distribution network master station. The process of uploading the communication messages of the distribution network terminal comprises the following steps: 1) the distribution network terminal equipment firstly transmits data information to the connected slave communication module through the data interface; 2) the slave communication module encodes and modulates the data information into a carrier signal, and then the carrier signal is transmitted to the medium-voltage distribution line through the coupling equipment. 3) The carrier signal is transmitted to the main node, enters the main communication module through the coupling equipment, and is converted into a digital signal through decoding and demodulation. 4) And the main communication module transmits the data to the master station through optical fiber communication or wireless communication.
The invention has the beneficial effects that: the medium-voltage carrier communication system applied to distribution network automation can rely on the existing medium-voltage distribution line as a transmission channel, does not need to erect a new communication line again, makes the existing distribution line fully utilized, can solve the problem that a distribution network terminal and a distribution network main station which do not cover an optical fiber communication area cannot communicate, and can provide a high-efficiency, stable and safe communication channel.
Drawings
Fig. 1 shows a ballast wave communication system according to the present invention applied to an overhead line structure.
Fig. 2 shows a ballast wave communication system according to the present invention applied to a cable line structure.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples to specifically illustrate the technical solutions of the present invention. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, in an embodiment of a medium-voltage carrier communication system applied to distribution automation, when the medium-voltage carrier communication system is applied to an overhead line, a medium-voltage communication manager is communicated with an upper distribution network master station network through an optical fiber or a wireless network; the medium-voltage communication management machine is connected with the main communication module, the main communication module is positioned on a main node and used for receiving issued data from the medium-voltage communication management machine and converting the data into carrier signals, the main communication module is isolated from high voltage in a medium-voltage distribution line through coupling equipment arranged on the installation side of the main communication module, the coupling equipment is connected with a certain phase power line of an overhead line, and the carrier signals are injected into the certain phase power line and transmitted through the power line; the slave communication module is positioned at the slave node, is connected with the distribution network terminal, is connected with the coupling equipment installed at the installation side of the slave communication module, receives the uploaded data from the distribution network terminal, and converts the data into a carrier signal; the coupling equipment is connected with a certain phase power line of the overhead line, and the carrier signal is injected onto the certain phase power line and transmitted through the power line. In the embodiment shown in fig. 1, the coupling device is connected to the C-phase power line of the overhead line and injects a carrier signal into the C-phase power line. Meanwhile, the slave communication module also monitors the carrier signals from the power distribution line continuously, converts the received carrier signals into data information and sends the data information to the distribution network terminal.
As shown in fig. 2, when the medium-voltage carrier communication system applied to distribution automation is applied to a cable line, a coupling device is connected to a cable shielding layer of the cable line, and a carrier signal is injected onto the cable shielding layer and transmitted through the cable shielding layer.
The method for realizing the communication between the distribution network main station and the distribution network terminal in the distribution network automation of the medium-voltage carrier communication system comprises a distribution network main station communication message issuing process and a distribution network terminal communication message uploading process. The distribution network master station communication message issuing process is as follows: 1) the master station sends the message through optical fiber communication or wireless communication, and the sent message is received by the distribution line medium-voltage communication management machine at the master node. The medium-voltage communication manager has a protocol conversion function, and adds the message to the address of the corresponding slave communication module after conversion. 2) After the message of the slave communication module address is added, the master communication module encodes and modulates the digital information to become a carrier signal, and then the carrier signal is sent to the medium-voltage distribution line for transmission through the coupling equipment. 3) The carrier signal is transmitted along the medium voltage distribution line and is transmitted to the slave communication modules via the coupling devices at the slave nodes. 4) After receiving the carrier signal from the communication module, the slave node demodulates and decodes the carrier signal to become a digital signal, and verifies whether the data is transmitted to the slave node by verifying the address of the slave communication module in the data. And if the addresses are not matched, no response is carried out, and if the addresses are matched, the received data are transmitted to the connected distribution network terminal equipment through the data interface. And the distribution network terminal equipment receives the message sent by the distribution network master station. The process of uploading the communication messages of the distribution network terminal comprises the following steps: 1) the distribution network terminal equipment firstly transmits data information to the connected slave communication module through the data interface; 2) the slave communication module encodes and modulates the data information into a carrier signal, and then the carrier signal is transmitted to the medium-voltage distribution line through the coupling equipment. 3) The carrier signal is transmitted to the main node, enters the main communication module through the coupling equipment, and is converted into a digital signal through decoding and demodulation. 4) And the main communication module transmits the data to the master station through optical fiber communication or wireless communication.
In summary, the medium-voltage carrier communication system applied to distribution network automation in the invention can rely on the existing medium-voltage distribution line as a transmission channel, and does not need to erect a new communication line again, so that the existing distribution line is fully utilized, the problem that a distribution network terminal and a distribution network main station which do not cover an optical fiber communication area cannot communicate can be solved, and a high-efficiency, stable and safe communication channel can be provided.
The above embodiments are illustrative of specific embodiments of the present invention, and are not restrictive of the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the present invention to obtain corresponding equivalent technical solutions, and therefore all equivalent technical solutions should be included in the scope of the present invention.
Claims (3)
1. A medium-voltage carrier communication system applied to distribution network automation comprises a medium-voltage communication manager, a main communication module, a slave communication module and coupling equipment; the medium-voltage carrier communication adopts a master multi-slave mode, a master communication module is installed at a master node, and slave communication modules are installed at a plurality of slave nodes on the same line; the medium-voltage communication management machine is connected with the main communication module, the main communication module is connected with the coupling equipment, the auxiliary communication module is connected with the coupling equipment and the distribution network terminal, the coupling equipment is respectively arranged at the installation sides of the main communication module and the auxiliary communication module, and the coupling equipment is connected with the distribution network terminal through the existing distribution line.
2. The medium-voltage carrier communication system applied to distribution network automation according to claim 1, wherein: the medium-voltage communication management machine is used for managing communication between a plurality of downlink slave nodes and a master node, realizing system parameter configuration, carrier link management, carrier communication scheduling and establishing and maintaining a nerve center linked between a slave terminal and a master station; the system can be communicated with an upper distribution network master station network through an optical fiber or a wireless network;
the main communication module is positioned at a main node, receives the issued data from the medium-voltage communication manager, converts the data into carrier signals and sends the carrier signals to a distribution line through coupling equipment; meanwhile, the main communication module also monitors the carrier signals from the power distribution line continuously, converts the received carrier signals into data information and sends the data information to the medium-voltage communication manager; the execution equipment realizes the conversion between the data information and the carrier signal and realizes the transmission and the reception of the carrier signal;
the slave communication module is positioned at a slave node, is connected with the distribution network terminal, receives the uploaded data from the distribution network terminal, converts the data into a carrier signal, and then sends the carrier signal to a distribution line through the coupling equipment; meanwhile, the slave communication module also monitors carrier signals from the distribution line continuously, converts the received carrier signals into data information and sends the data information to the distribution network terminal; the execution equipment realizes the conversion between the data information and the carrier signal and realizes the transmission and the reception of the carrier signal;
the coupling equipment isolates the master communication module and the slave communication module from high voltage in the medium-voltage distribution line and injects carrier signals into the distribution line; when the distribution line is an overhead line, the coupling equipment injects a carrier signal onto a certain phase power line; when the distribution line is a cable line, the coupling equipment injects the carrier signal into the cable shielding layer.
3. The medium-voltage carrier communication system applied to distribution network automation according to claim 1, wherein: the method for realizing the communication between the distribution network main station and the distribution network terminal in the distribution network automation by the medium-voltage carrier communication system comprises a distribution network main station communication message issuing process and a distribution network terminal communication message uploading process; the distribution network master station communication message issuing process is as follows: 1) the master station transmits a message through optical fiber communication or wireless communication, and the transmitted message is received by a distribution line medium-voltage communication manager at the master node; the medium-voltage communication manager has a protocol conversion function, and adds the message to the address of the corresponding slave communication module after conversion; 2) after the message of the slave communication module address is added, the master communication module encodes and modulates the digital information to become a carrier signal, and then the carrier signal is sent to a medium-voltage distribution line for transmission through coupling equipment; 3) the carrier signal is transmitted along the medium-voltage distribution line and is transmitted to each slave communication module through the coupling equipment at each slave node; 4) after receiving the carrier signal from the communication module, demodulating and decoding the carrier signal to form a digital signal, and verifying the address of the communication module in the data to determine whether the data is sent to the slave node; if the addresses are not matched, no response is carried out, and if the addresses are matched, the received data are transmitted to the connected distribution network terminal equipment through the data interface; the distribution network terminal equipment receives a message sent by a distribution network master station; the process of uploading the communication messages of the distribution network terminal comprises the following steps: 1) the distribution network terminal equipment firstly transmits data information to the connected slave communication module through the data interface; 2) the slave communication module encodes and modulates the data information into a carrier signal, and then the carrier signal is sent to a medium-voltage distribution line through coupling equipment; 3) the carrier signal is transmitted to a main node, enters a main communication module through coupling equipment, and is converted into a digital signal through decoding and demodulation; 4) and the main communication module transmits the data to the master station through optical fiber communication or wireless communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811034572.6A CN110875758A (en) | 2018-09-02 | 2018-09-02 | Medium-voltage carrier communication system applied to distribution network automation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811034572.6A CN110875758A (en) | 2018-09-02 | 2018-09-02 | Medium-voltage carrier communication system applied to distribution network automation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110875758A true CN110875758A (en) | 2020-03-10 |
Family
ID=69716235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811034572.6A Withdrawn CN110875758A (en) | 2018-09-02 | 2018-09-02 | Medium-voltage carrier communication system applied to distribution network automation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110875758A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884679A (en) * | 2020-06-13 | 2020-11-03 | 青岛鼎信通讯股份有限公司 | Carrier channel data transmission distributed management system based on medium-voltage line |
| CN112509306A (en) * | 2020-11-17 | 2021-03-16 | 青岛鼎信通讯股份有限公司 | Medium-voltage carrier communication manager system based on AM3352 |
| CN112821922A (en) * | 2021-02-23 | 2021-05-18 | 青岛鼎信通讯股份有限公司 | Rack-mounted carrier communication management machine based on medium-voltage carrier |
| CN115765799A (en) * | 2022-11-05 | 2023-03-07 | 青岛鼎信通讯股份有限公司 | Scheme for logging in different main stations for data transmission by same terminal based on power line carrier |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102663867A (en) * | 2012-04-17 | 2012-09-12 | 国网电力科学研究院 | Real-time antitheft monitoring method for cables based on medium voltage power line shielding layer carrier |
| CN202696599U (en) * | 2012-03-27 | 2013-01-23 | 上海市电力公司 | Power line carrier communication system of overhead line |
| CN105551223A (en) * | 2016-01-29 | 2016-05-04 | 青岛鼎信通讯股份有限公司 | Concentrated meter-reading terminal uplink communication system based on medium-voltage carrier and wireless communication |
| CN105825657A (en) * | 2016-05-19 | 2016-08-03 | 国网新疆电力公司伊犁供电公司 | Method and device for collecting power utilization information through carrier wave controllers |
| CN207164993U (en) * | 2017-09-13 | 2018-03-30 | 沈阳欣郡泰能源科技有限公司 | The data transfer communications device of mine mechanism |
-
2018
- 2018-09-02 CN CN201811034572.6A patent/CN110875758A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202696599U (en) * | 2012-03-27 | 2013-01-23 | 上海市电力公司 | Power line carrier communication system of overhead line |
| CN102663867A (en) * | 2012-04-17 | 2012-09-12 | 国网电力科学研究院 | Real-time antitheft monitoring method for cables based on medium voltage power line shielding layer carrier |
| CN105551223A (en) * | 2016-01-29 | 2016-05-04 | 青岛鼎信通讯股份有限公司 | Concentrated meter-reading terminal uplink communication system based on medium-voltage carrier and wireless communication |
| CN105825657A (en) * | 2016-05-19 | 2016-08-03 | 国网新疆电力公司伊犁供电公司 | Method and device for collecting power utilization information through carrier wave controllers |
| CN207164993U (en) * | 2017-09-13 | 2018-03-30 | 沈阳欣郡泰能源科技有限公司 | The data transfer communications device of mine mechanism |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884679A (en) * | 2020-06-13 | 2020-11-03 | 青岛鼎信通讯股份有限公司 | Carrier channel data transmission distributed management system based on medium-voltage line |
| CN112509306A (en) * | 2020-11-17 | 2021-03-16 | 青岛鼎信通讯股份有限公司 | Medium-voltage carrier communication manager system based on AM3352 |
| CN112821922A (en) * | 2021-02-23 | 2021-05-18 | 青岛鼎信通讯股份有限公司 | Rack-mounted carrier communication management machine based on medium-voltage carrier |
| CN115765799A (en) * | 2022-11-05 | 2023-03-07 | 青岛鼎信通讯股份有限公司 | Scheme for logging in different main stations for data transmission by same terminal based on power line carrier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110875758A (en) | Medium-voltage carrier communication system applied to distribution network automation | |
| CN103812710B (en) | Power communication communication terminal special | |
| CN111107141A (en) | Electric power wireless private network system based on LTE230MHz | |
| CN106787163A (en) | A kind of centralized configuration and long distance control system for substation network communication device | |
| CN104135306A (en) | Medium-voltage broadband power carrier networking system and networking method suitable for distribution automation | |
| CN211509044U (en) | Medium-voltage line power failure indication transmission system based on medium-voltage carrier communication | |
| CN102263593A (en) | FTTH (fiber to the home)-based energy efficiency intelligent management and broadband access system and method | |
| CN102857293A (en) | RF (Radio Frequency) 485 data link | |
| CN110798263A (en) | Intelligent power distribution network communication multidimensional networking structure | |
| CN112437443A (en) | Method for establishing electric power wireless private network adapting to electric power CPS service communication requirement | |
| CN115473796B (en) | Real-time monitoring system of electric power distribution network based on Beidou+4G and encryption modes | |
| CN208922471U (en) | A kind of no signal platform area power information collecting transmitter | |
| CN106411361A (en) | Electricity information collection system based on medium voltage power carrier and control method thereof | |
| CN111402562A (en) | Power consumption information deep coverage acquisition system | |
| CN105704121A (en) | Electric power data safe transmission system and method based on proprietary 4G network | |
| CN108550252A (en) | Transmission line icing monitoring system based on optical-fibre communications | |
| CN214154556U (en) | Electric power private network system based on 5G network | |
| CN111404264B (en) | Method for maintaining source end of low-voltage distribution transformer area equipment and realizing plug and play | |
| Li et al. | Research on power communication mode under the architecture of mountain microgrid | |
| CN204046656U (en) | Be applied to the medium-voltage carrier system of rural power grids Ji Chaopingtai | |
| CN207993230U (en) | A kind of power information acquisition system based on medium-voltage carrier technology | |
| CN205263627U (en) | Gas wireless long -distance monitoring device | |
| CN105790793A (en) | Multi-frequency point carrier host system for medium voltage carrier communication | |
| CN110160595A (en) | Liquid level acquisition system based on ZIGBEE Radio Transmission Technology | |
| CN202353563U (en) | Intelligent power-distributing network optical fiber double-loop self-healing communication and measurement system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200310 |
|
| WW01 | Invention patent application withdrawn after publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Sun Siqi Document name: Notification of eligibility |
|
| DD01 | Delivery of document by public notice |