CN112039032B - Wide area wireless synchronous centralized multi-stage multi-terminal differential protection system and implementation method - Google Patents
Wide area wireless synchronous centralized multi-stage multi-terminal differential protection system and implementation method Download PDFInfo
- Publication number
- CN112039032B CN112039032B CN202010677095.6A CN202010677095A CN112039032B CN 112039032 B CN112039032 B CN 112039032B CN 202010677095 A CN202010677095 A CN 202010677095A CN 112039032 B CN112039032 B CN 112039032B
- Authority
- CN
- China
- Prior art keywords
- main control
- control unit
- sensing execution
- power supply
- differential protection
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to a wide area wireless synchronous centralized multi-stage multi-terminal differential protection system and an implementation method. The invention adopts a wireless communication mode to send sampling synchronization instructions to each sensing execution unit through a main control unit to realize sampling synchronization, each sensing execution unit is installed on a power supply line in sections according to the load equalization principle, each sensing execution unit sends synchronously sampled and calculated electrical quantity to the main control unit through a wireless communication mode, the main control unit calculates differential electrical quantity, when the differential electrical quantity reaches an action value, the main control unit sends a differential action instruction to the sensing execution unit, the sensing execution unit executes the action, and the main control unit sends the differential action instruction to the corresponding sensing execution unit, thereby realizing multi-stage multi-terminal differential protection of the power supply line and improving the reliability of the differential protection. The technical scheme provided by the invention can realize unlimited-level multi-terminal differential protection of the same power supply line and wide-area differential protection of different power supply lines erected on the same pole.
Description
Technical Field
The invention relates to the technical field of power system relay protection, in particular to a wide area wireless synchronous centralized multi-stage multi-terminal differential protection system and an implementation method.
Background
At present, an optical fiber differential protection mode is mainly adopted for differential protection of a power transmission line, the mode is that optical fiber differential protection is respectively installed at two ends of a transformer station, synchronous sampling of the two ends is realized through optical fiber communication, differential current and braking current are calculated, and switches at two ends of the line are tripped when action conditions are met, so that a line protection function is realized. For differential protection of a multi-port line, a plurality of optical fiber communication interfaces need to be configured, complexity of hardware design is increased, and feasibility of adoption is not available at present. Meanwhile, differential protection cannot be realized for short-circuit faults between power supply circuits from different power supply directions erected on the same pole.
With the large-scale access of renewable energy sources to a power distribution network, the grid structures of an alternating current power distribution network and a direct current power distribution network which operate in a mixed mode are more and more, the power distribution network with multiple power sources is complex in structure and variable in operation mode, an effective protection means is lacked for a power supply mode of a multi-branch multi-contact complex power supply network framework and power supply circuits which are erected on the same pole in different power supply directions, how to realize unlimited-level multi-terminal differential protection in the alternating current and direct current hybrid power distribution network is achieved, the accuracy of fault detection and fault isolation is improved, power supply equipment is protected, the power failure time is shortened, the limitation of two-terminal differential protection in the power transmission line is overcome, and the problem concerned by the current power supply department is solved.
Disclosure of Invention
The invention aims to provide a wide area wireless synchronous centralized multi-stage multi-terminal differential protection system and an implementation method, wherein a wireless communication mode is adopted, a sampling synchronous instruction is sent to each sensing execution unit through a main control unit to realize sampling synchronization, the sensing execution units are installed on a power supply line in a segmented mode, the main control unit receives the electric quantity of the sensing execution units and calculates the differential quantity to meet action conditions, the main control unit sends an action execution command to the sensing execution units to realize unlimited multi-terminal differential protection of the same power supply line, multi-stage multi-terminal differential protection of a multi-branch multi-connection complex power supply network framework and wide area differential protection of power supply lines with different power supply directions erected on the same pole.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the wide area wireless synchronous centralized multi-stage multi-terminal differential protection system comprises a main control unit and a sensing execution unit;
the sensing execution units are in a plurality of groups; the multiple groups of sensing execution units are arranged on the power supply line in a distributed manner;
the main control unit receives the electrical quantity synchronously collected by the sensing execution unit and determines a fault interval, and the main control unit sends a differential action command to the sensing execution units at two ends of the fault interval.
Further, also comprises
And the clock system is used for sending a pulse per second signal to the main control unit.
Furthermore, the clock system adopts a clock synchronization system or an IEEE1588 protocol system of an intelligent substation.
A method for realizing wide area wireless synchronous centralized multi-stage multi-terminal differential protection,
the method comprises the following steps:
the method comprises the following steps: the master control unit receives a clock system taking pulse per second as a reference, and when the clock system synchronizes time and keeps time, the master control unit sends a full-network synchronous sampling pulse signal to each sensing execution unit through the wireless communication module, and starts synchronous data acquisition and calculation storage;
step two: the main control unit receives synchronous sampling data of each sensing execution unit, ID identification is carried out according to upstream, downstream and adjacent, differential quantity and braking quantity are calculated, starting and action commands are sent to corresponding fault sensing execution units according to starting and action conditions, the differential quantity is continuously detected after the tripping command is output, the superior sensing execution unit of the sensing execution unit delays 50ms to output the tripping command, and multi-level and multi-terminal differential protection is realized;
step three: when the main control unit detects that the differential electric quantity of adjacent power supply lines meets the starting and action commands, the main control unit sends a starting command to the corresponding sensing execution unit and outputs a tripping command, after the tripping command is output, the upstream or downstream continuously detects the differential quantity, the sensing execution unit adjacent to the sensing execution unit receives the main control unit command, and the tripping command is output after 50ms of delay, so that multi-stage and multi-terminal differential protection is realized.
Preferably, the master control station is a dual-power-supply master control station, the master control unit is installed in the dual-power-supply master control station, and the master control units are mutually standby when the dual power supplies power.
Preferably, the master control units are mutually standby and indicate that the master control unit of the master control station at one side is designated as a master when the master control unit normally operates, and the master control unit at the other side is hot standby.
Preferably, the sensing execution unit is installed in the power supply line in a segmented mode along the power supply line according to the principle that loads are uniformly distributed.
Preferably, the wireless communication module in the first step includes any one or more of a module for receiving GPS and Beidou second pulse time service, a 4G data interaction between the main control unit and the sensing execution unit, a 5G data interaction between the main control unit and the sensing execution unit, and a special high-speed wireless communication module.
Preferably, in the second step, the differential quantity and the braking quantity are obtained by comprehensively calculating electrical quantities upstream and downstream of the sensor execution unit of the power supply line erected on the same side, the opposite side and the adjacent same pole, and the calculation formula is as follows:
the operation conditions are as follows: i is CD ≥I DZ
Wherein: i is CD For differential current magnitude, I R For the amount of brake current, I DZ For setting the differential current magnitude i IDm For the amount of current on the power supply side, i IDn For the other side of the supply current amount, i LIDm For adjacent same pole erection of local side current of power supply line, i LIDn The current amount of the other side of the power supply circuit is set up for the adjacent same pole.
Preferably, in the third step, the sensing execution units on the same side, the opposite side and the adjacent same-pole erected power supply circuit refer to sensing execution units installed on different power supply circuits erected on the same pole.
The invention provides a wide area wireless synchronous centralized multi-stage multi-terminal differential protection system and an implementation method, which realize wide area synchronous sampling by adopting a wireless communication mode, wherein sensing execution units are installed on a power supply line in a subsection mode, a main control unit receives synchronous electric quantity acquired by the sensing execution units, calculates differential quantity and braking quantity, determines a fault area, and sends differential action commands to the sensing execution units at two ends of the fault area, and sends corresponding differential action commands when detecting that the adjacent same-pole erected power supply line has the differential electric quantity and meets action conditions, so that the reliability of differential protection is improved.
Drawings
FIG. 1 is a schematic diagram of a wide area wireless synchronous centralized multi-stage multi-terminal differential protection architecture according to the present invention;
fig. 2 is a schematic diagram of the system connection of the present invention.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
The wireless synchronous centralized multi-stage multi-terminal differential protection system comprises a main control unit, a main control station, a sensing execution unit, a line supply circuit and a clock system; wherein, the sensing execution units are in a plurality of groups; the main control unit is arranged in the main control station, and the multiple groups of sensing execution units are arranged on a power supply circuit in a distributed manner;
the method comprises the following steps:
the method comprises the following steps: the master control unit receives a clock system taking pulse per second as a reference, and when time is synchronized with the clock system and kept, the master control unit sends a full-network synchronous sampling pulse signal to each sensing execution unit through the wireless communication module, and starts synchronous data acquisition and calculation storage;
step two: the main control unit receives synchronous sampling data of each sensing execution unit, carries out ID identification according to upstream, downstream and adjacent, calculates differential quantity and braking quantity, sends starting and action commands to corresponding fault sensing execution units according to starting and action conditions, continues to detect the differential quantity after outputting a tripping command, and outputs the tripping command after delaying 50ms by a superior sensing execution unit of the sensing execution unit, so that multi-level and multi-terminal differential protection is realized;
step three: when the main control unit detects that the differential electric quantity of adjacent power supply lines meets the starting and action commands, the main control unit sends a starting command to the corresponding sensing execution unit and outputs a tripping command, after the tripping command is output, the upstream or downstream continuously detects the differential quantity, the sensing execution unit adjacent to the sensing execution unit receives the main control unit command, and the tripping command is output after 50ms of delay, so that multi-stage and multi-terminal differential protection is realized.
The main control station is a dual-power-supply main control station, the main control unit is installed in the dual-power-supply main control station, and the main control units are mutually standby when the dual power supplies supply power.
The main control units are mutually standby and designate one side of the main control station main control unit as a main control unit when the main control unit normally operates, and the other side of the main control unit is hot standby.
The clock system adopts a clock synchronization system or an IEEE1588 protocol system of an intelligent substation.
And the multi-stage multi-terminal differential protection in the second step refers to multi-power supply line differential protection and multi-stage differential protection.
In the third step, the sensing execution units on the side, the opposite side and the adjacent same-pole erected power supply circuit refer to the sensing execution units arranged on different power supply circuits erected on the same pole.
Specifically, in the embodiment shown in fig. 2, the sensing execution units are installed in a distributed manner along the power supply line in a segmented manner according to the principle of uniform load distribution.
Specifically, in the embodiment shown in fig. 2, the main control unit is installed in the main control station and sends a synchronous sampling command to the sensing execution unit, and the wireless communication module and the sensing execution units installed in different segments are used for realizing information interaction.
Step four: the synchronous sampling data is interacted between each sensing execution unit and the main control unit, the synchronous electrical quantity data received by the main control unit is identified according to the ID of the upstream, downstream and adjacent, the differential quantity and the braking quantity are calculated, the starting and action conditions are met, and the starting and action commands are sent to the corresponding sensing execution units;
specifically, in the embodiment shown in fig. 2, each sensing execution unit interacts with the main control unit to synchronously sample data, and performs ID identification according to upstream and downstream, where the sensing execution unit 3 is identified as ID3, the upstream sensing execution unit 1 and the sensing execution unit 2 are identified as ID1 and ID2, and the downstream sensing execution unit 4 and the sensing execution unit 5 are identified as ID4 and ID5.
Specifically, in the embodiment shown in fig. 2, the point F fault sensing execution unit 3 and the sensing execution unit 4 interact with the main control unit to synchronously sample information, the main control unit calculates the differential quantity and the braking quantity, meets the action condition, sends a tripping command, and separates the corresponding switches at the side; meanwhile, the main control unit calculates the starting timing of the corresponding upper sensing execution unit 2 and the sensing execution unit 5, the differential current is calculated within 50ms of delay, the differential quantity and the braking quantity meet the action condition, the sensing execution unit 2 and the sensing execution unit 5 send out a tripping command, corresponding switches on the side are separated, and multi-stage multi-terminal differential protection is realized.
Specifically, the method for calculating the differential amount and the braking amount in the embodiment of fig. 2 is as follows:
the operation conditions are as follows: I.C. A CD ≥I DZ
Wherein: i is CD For differential current magnitude, I R For the amount of brake current, I DZ For setting the differential current magnitude i IDm For the amount of current on the power supply side, i IDn For the other side of the supply current amount, i LIDm For the current of the local side of the adjacent power supply line, i LIDm ＝0，i LIDn For the other side of the adjacent supply line, i LIDn ＝0。
The upper level differential calculation method is a current amount corresponding to m ± 1 or n ± 1, and m =3 and n =4 in the present embodiment.
The invention provides a method for realizing wide area wireless synchronous centralized multi-stage multi-terminal differential protection, which adopts a wireless communication mode to realize wide area synchronous sampling, a sensing execution unit is installed on a power supply line in a subsection mode, a main control unit receives the electrical quantity synchronously collected by the sensing execution unit, calculates the differential quantity and the braking quantity, determines a fault interval, and sends out differential action commands to the sensing execution units at two ends of the fault interval, and sends out corresponding differential action commands when detecting that the adjacent same-pole erected power supply line has the differential electrical quantity and meets action conditions, thereby improving the reliability of the differential protection.
The method comprises the steps that a wireless communication mode is adopted, a sampling synchronization instruction is sent to each sensing execution unit through a main control unit to achieve sampling synchronization, the sensing execution units are installed on a power supply line in a segmented mode, the main control unit receives the electric quantity of the sensing execution units and calculates the difference quantity to meet action conditions, the main control unit sends action execution commands to the sensing execution units, multi-terminal differential protection of the same power supply line in an unlimited order and multi-terminal differential protection of a multi-branch multi-network complex power supply network framework are achieved, and meanwhile wide-area differential protection of power supply lines erected on the same pole in different power supply directions can be achieved.
The above embodiments are merely to illustrate the technical ideas of the present invention, and the technical means in the above embodiments are changed, replaced, modified in a manner that can be easily imagined by those skilled in the art according to the technical ideas provided by the present invention, and the functions of the technical means in the above embodiments are substantially the same as those of the corresponding technical means in the present invention, and the objectives of the invention are also substantially the same, so that the technical solutions formed by fine tuning the above embodiments still fall within the scope of the present invention.
Claims (8)
1. The wide area wireless synchronous centralized multi-stage multi-terminal differential protection implementation method is characterized in that a wide area wireless synchronous centralized multi-stage multi-terminal differential protection system comprises a main control unit and a sensing execution unit; the sensing execution units are in a plurality of groups; the multiple groups of sensing execution units are distributed on the power supply line; the main control unit receives the electrical quantity synchronously collected by the sensing execution unit and determines a fault interval, and the main control unit sends a differential action command to the sensing execution units at two ends of the fault interval;
the method comprises the following steps:
the method comprises the following steps: the master control unit receives a clock system taking pulse per second as a reference, and sends full-network synchronous sampling pulse signals to each sensing execution unit through the wireless communication module when the clock system synchronizes time and keeps time with the clock system, and starts synchronous data acquisition and calculation storage;
step two: the main control unit receives synchronous sampling data of each sensing execution unit, carries out ID identification according to upstream, downstream and adjacent, calculates differential quantity and braking quantity, sends starting and action commands to corresponding fault sensing execution units when the starting and action conditions are met, continues to detect the differential quantity after the tripping command is output, and outputs the tripping command after the higher-level sensing execution unit delays for 50ms, so that multi-level multi-terminal differential protection is realized;
in the second step, the differential quantity and the braking quantity are obtained by comprehensively calculating the electric quantities of the upstream and the downstream of the sensing execution unit of the power supply line erected on the same side, the opposite side and the adjacent same pole, and the calculation formula is as follows:
the operation conditions are as follows: i is CD ≥I DZ
Wherein: I.C. A CD For differential current magnitude, I R For the amount of brake current, I DZ For setting the differential current magnitude i IDm For the amount of current on the power supply side, i IDn For the other side of the supply current amount, i LIDm For adjacent same pole erection of power supply line current magnitude, i LIDn The current quantity of the other side of the power supply circuit is erected for the adjacent same pole;
step three: when the main control unit detects that the differential electric quantity of adjacent power supply lines meets the starting and action commands, the main control unit sends a starting command to the corresponding sensing execution unit and outputs a tripping command, after the tripping command is output, the upstream or the downstream continuously detects the differential quantity, the main control unit receives the command of the main control unit with the adjacent superior sensing execution unit of the sensing execution unit, the tripping command is output after 50ms delay, and multi-stage and multi-terminal differential protection is realized.
2. The wide area wireless synchronous centralized multi-stage multi-terminal differential protection implementation method according to claim 1, wherein: the main control station is a dual-power main control station, the main control unit is installed in the dual-power main control station, and the main control units are mutually standby when the dual power supplies.
3. The wide area wireless synchronization centralized multi-stage multi-terminal differential protection implementation method according to claim 2, wherein: the main control units are mutually standby and designate one side of the main control station as a main control unit when the main control units normally run, and the other side of the main control unit is standby.
4. The wide area wireless synchronous centralized multi-stage multi-terminal differential protection implementation method according to claim 1, wherein: the sensing execution units are installed in the power supply line in sections along the power supply line according to the principle that loads are uniformly distributed.
5. The wide area wireless synchronous centralized multi-stage multi-terminal differential protection implementation method according to claim 1, wherein: in the first step, the wireless communication module comprises any one or more of a receiving GPS (global positioning system), a Beidou second pulse time service module, a 4G data interaction between the main control unit and the sensing execution unit, a 5G data interaction between the main control unit and the sensing execution unit and a special high-speed wireless communication module.
6. The wide area wireless synchronous centralized multi-stage multi-terminal differential protection implementation method according to claim 1, wherein: in the third step, the sensing execution units on the same side, the opposite side and the adjacent same-pole erected power supply circuit refer to the sensing execution units arranged on different power supply circuits erected on the same pole.
7. The method according to claim 1, wherein the wide area wireless synchronous centralized multi-stage multi-terminal differential protection implementation method,
the wide area wireless synchronous centralized multi-stage multi-terminal differential protection system further comprises a clock system used for sending pulse per second signals to the main control unit.
8. The method according to claim 7, wherein the wireless synchronous centralized multi-stage multi-terminal differential protection system is further characterized in that,
the clock system adopts a clock synchronization system or an IEEE1588 protocol system of an intelligent substation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010677095.6A CN112039032B (en) | 2020-07-14 | 2020-07-14 | Wide area wireless synchronous centralized multi-stage multi-terminal differential protection system and implementation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010677095.6A CN112039032B (en) | 2020-07-14 | 2020-07-14 | Wide area wireless synchronous centralized multi-stage multi-terminal differential protection system and implementation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112039032A CN112039032A (en) | 2020-12-04 |
| CN112039032B true CN112039032B (en) | 2022-10-04 |
Family
ID=73579648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010677095.6A Active CN112039032B (en) | 2020-07-14 | 2020-07-14 | Wide area wireless synchronous centralized multi-stage multi-terminal differential protection system and implementation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112039032B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114530834B (en) * | 2022-02-23 | 2023-10-31 | 南京国电南自电网自动化有限公司 | Power distribution network line current locking type incomplete differential protection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012061978A1 (en) * | 2010-11-09 | 2012-05-18 | Abb Research Ltd. | Synchronization method for current differential protection |
| CN102611086A (en) * | 2012-03-27 | 2012-07-25 | 许继集团有限公司 | Centralized protection system and method for region distribution network |
| CN110838713A (en) * | 2019-11-26 | 2020-02-25 | 山东大学 | 5G network-based distributed differential protection method and system for power distribution network |
-
2020
- 2020-07-14 CN CN202010677095.6A patent/CN112039032B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012061978A1 (en) * | 2010-11-09 | 2012-05-18 | Abb Research Ltd. | Synchronization method for current differential protection |
| CN102611086A (en) * | 2012-03-27 | 2012-07-25 | 许继集团有限公司 | Centralized protection system and method for region distribution network |
| CN110838713A (en) * | 2019-11-26 | 2020-02-25 | 山东大学 | 5G network-based distributed differential protection method and system for power distribution network |
Non-Patent Citations (2)
| Title |
|---|
| 智能变电站集中式保护研究综述;赵建文等;《电气应用》;20140605;第33卷(第11期);第46-49页 * |
| 智能配电网保护系统的研究;王雷等;《数字技术与应用》;20130531(第5期);第84-85页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112039032A (en) | 2020-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105140894B (en) | A kind of power distribution network differential protecting method based on Phase Difference Principle | |
| CN102623966B (en) | Differential protection method for bus | |
| CN109742741B (en) | Relay protection data synchronization method for active power distribution network | |
| CN107332216B (en) | A kind of differential protection method for bus and device using motor synchronizing technology | |
| CN103036216B (en) | System and clock synchronization method applied to intelligentized converting station digitization busbar differential protection | |
| CN103117537A (en) | Power distribution network area protection method and system | |
| CN108616111B (en) | Multi-end T-connection power transmission line optical fiber differential protection method based on interpolation synchronization | |
| CN107069681B (en) | A kind of multi-point circuit differential protecting method and system | |
| CN102981103A (en) | Method for positioning closed-loop network faults through fault signal self-synchronization | |
| CN108400576A (en) | A kind of implementation method of alternating current-direct current mixing distribution protection | |
| CN111030058A (en) | Power distribution network partition protection method based on 5G communication | |
| CN112039032B (en) | Wide area wireless synchronous centralized multi-stage multi-terminal differential protection system and implementation method | |
| CN110086167A (en) | A kind of alternating current-direct current mixed connection power distribution network self-healing control system and control method | |
| CN103746304B (en) | The remodeling method of Intelligent transformer station | |
| CN104319743B (en) | The method and apparatus of the main transformer high-pressure side Fast Operating Backup Protection based on station domain information | |
| CN113422354A (en) | Power distribution network protection and self-healing system based on 5G network communication | |
| CN102801557A (en) | Systematic method for improving network sampling reliability of transformer station | |
| CN113451987A (en) | Ring network power supply system fault positioning system and method based on communication injection waveform | |
| CN106160226B (en) | Method for improving PTP time synchronization precision of intelligent substation | |
| CN116799756A (en) | Differential protection system and method for multi-terminal power transmission line | |
| CN201860174U (en) | Distribution network automation system with distributed power source | |
| CN112736868B (en) | 5G intelligent distributed distribution network protection system | |
| CN205693446U (en) | A kind of line protective devices of plug and play | |
| Li et al. | Architecture of centralised protection suiting future development trend of distribution network | |
| Ropp et al. | Synchrophasors for island detection |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |