CN109412125B - Fully-adaptive override-preventing protection method suitable for complex power distribution network - Google Patents
Fully-adaptive override-preventing protection method suitable for complex power distribution network Download PDFInfo
- Publication number
- CN109412125B CN109412125B CN201811345982.2A CN201811345982A CN109412125B CN 109412125 B CN109412125 B CN 109412125B CN 201811345982 A CN201811345982 A CN 201811345982A CN 109412125 B CN109412125 B CN 109412125B
- Authority
- CN
- China
- Prior art keywords
- override
- protection device
- level
- locking information
- fault
- 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
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
- H02H7/28—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 for meshed systems
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a fully-adaptive override-preventing protection method suitable for a complex power distribution network. The method mainly comprises the steps of an anti-override protection device, a switch, a communication cable and an optical cable. The override-proof protection device is connected to a main communication network through a switch and has an overcurrent quick-break interphase fault detection function and a low-current grounding fault detection function. The anti-override protection device automatically identifies the hierarchical position of the anti-override protection device in the power distribution network system through the GOOSE message containing the locking information sent by the lower-level protection device. When the power distribution network has faults, the override prevention protection device judges the faults and combines the received GOOSE blocking information to perform fault tripping, fault blocking or delayed tripping, and simultaneously sends a blocking signal to the upper level protection device in the positive direction or the negative direction according to the fault direction and the received blocking information, so that the override prevention protection function of the whole power distribution network is realized, the correct selection of the faults and the tripping isolation of the faults are ensured, and the safe and stable operation of the power distribution network is realized.
Description
Technical Field
the invention belongs to the field of power automation control. Aiming at the problems that a multi-level complex power supply system such as an urban power distribution network, particularly a power distribution network of an industrial and mining enterprise, easily loses selectivity to cause override trip and the like when the power grid fails, the powerful processing function of an intelligent override-prevention protection device is utilized, fault information transmission is realized through a GOOSE rapid communication mechanism, the construction difficulty is simplified, and a perfect override-prevention protection scheme of the power distribution network is realized.
Background
the multi-stage complex power supply system of an urban power distribution network, particularly a power distribution network of an industrial and mining enterprise and the like has the characteristics of short power supply distance, large power supply density, small protection interval and the like, fault currents are difficult to distinguish when a power grid fault or a power utilization device fails, and the delay fixed value of the power distribution network cannot meet the selectivity requirement even if limited by the protection delay fixed value of a main incoming line, so that override tripping is caused, large-area power failure is caused, the normal operation of the enterprise is seriously affected, and the selectivity of the override system for preventing the override tripping is required to be provided. In an underground power supply system, some enterprises are influenced by power supply capacity, a dual-power system is operated in parallel, more serious power failure accidents are caused when the system fails, even power failure in the whole range is caused, and serious threats are brought to production and personal safety. Dual and multiple power supply systems present challenges to single power supply override prevention protection systems. The downhole power supply system is not a static system, and the operation mode of the downhole power supply system continuously changes along with the excavation of a mine, which provides a difficult problem for the maintenance and the expansion of the override prevention system.
Disclosure of Invention
Aiming at the special requirements of multistage complex power supply systems such as the power distribution network of the industrial and mining enterprises on the override-preventing protection system, the invention provides the following fully-adaptive override-preventing protection method suitable for the complex power distribution network.
the technical scheme adopted by the invention is as follows: a full-adaptive override-preventing protection method suitable for a complex power distribution network mainly comprises an override-preventing protection device, a switch, a communication cable and an optical cable. The override-preventing protection device is divided into a line protection device arranged on the incoming line switch and the outgoing line switch and a sectional protection device arranged on the sectional interconnection switch according to the installation position. The switch is installed in the communication cabinet, is used for preventing communication between the protection device of transshipping, possesses electric Ethernet interface and optic fibre Ethernet interface, and electric Ethernet interface is used for being connected with protection device, and the optical Ethernet interface is used for the connection of long distance communication's main communication looped netowrk. The override-proof protection device is provided with an electric Ethernet interface, is connected into a main communication network through a switch, and has an overcurrent quick-break interphase fault detection function and a small-current grounding fault detection function. The anti-override protection device automatically identifies the hierarchical position of the anti-override protection device in the power distribution network system through the GOOSE message containing the locking information sent by the lower-level protection device. When the power distribution network has faults, the override prevention protection device judges the faults and combines the received GOOSE blocking information to perform fault tripping, fault blocking or delayed tripping, and simultaneously sends a blocking signal to the upper level protection device in the positive direction or the negative direction according to the fault direction and the received blocking information, so that the override prevention protection function of the whole power distribution network is realized, the correct selection of the faults and the tripping isolation of the faults are ensured, and the safe and stable operation of the power distribution network is realized.
The fully-adaptive override-preventing protection method suitable for the complex power distribution network is further characterized in that: the override-preventing protection devices form an override-preventing rapid communication network through a switch, a communication cable and an optical cable. The protection method is suitable for single-power distribution system operation, and double-power or multi-power distribution system split or parallel operation. The override prevention protection device can send override prevention locking information to any one protection device which is electrically connected at one time, and the electrical upper and lower hierarchical relation can be determined through a communication path between the protection devices. The anti-override protection device is provided with an Ethernet interface and a GOOSE rapid communication function, and anti-override locking information is transmitted between the devices through GOOSE messages. The anti-override protection system specifies the positive direction of fault power, points to the line for the bus in the positive direction of the line, and points to the II bus for the I bus in the positive direction of the sectional contact. The override-proof protection device is an intelligent device and has analog quantity such as alternating voltage and current acquisition function, input quantity such as switch position acquisition function, output quantity such as relay control function and fault detection function. The override-proof protection device can set MAC addresses of all power supply branch protection devices for receiving locking information sent by the device, the address of the receiving device is named as a forward receiving MAC address when a forward fault occurs, and the address of the receiving device is named as a reverse receiving MAC address when a reverse fault occurs. When the two anti-override protection devices mutually transmit the locking information, the device meeting the mutual transmission condition stops transmitting the locking information to the opposite side and discards the received locking information of the opposite side. And if the locking information is received at the same time, the two locking signals are upgraded to a level after logical operation, and then the locking information is sent to the set forward receiving MAC or reverse receiving MAC according to the fault direction. And meanwhile, the locking time is generated according to the received locking hierarchy, and the locking device is used for protecting and delaying tripping, and directly tripping if the locking information is not received. The override-proof protection device has a fault detection function and can control the switch to remove faults, and not only can detect phase-to-phase faults, but also can detect small-current grounding faults.
Has the advantages that: the invention realizes the anti-override protection system method by strengthening the intelligent function of the anti-override protection device and utilizing the existing universal network resources, has the advantages of high real-time performance, reliable scheme, simple construction, free expansion, convenient maintenance and the like, is suitable for various simple and complex power distribution systems, and is particularly suitable for the deployment of the anti-override system of an underground power supply system.
Drawings
Fig. 1 is a system configuration block diagram of a fully adaptive override protection method applicable to a complex power distribution network according to the present invention.
Fig. 2 is a logic schematic block diagram of a fully adaptive override protection method suitable for a complex power distribution network according to an embodiment of the present invention.
Detailed Description
the technical solution of the present invention is further described below by specific examples.
fig. 1 is a block diagram of a system configuration of a fully adaptive override prevention protection method for a complex power distribution network according to the present invention.
two substations A, B, two section bus I, II buses of each substation run in parallel. Two sections of buses of the transformer substation A are respectively connected with power supplies P1 and P2, and two sections of buses of the transformer substation B are respectively connected with power supplies P3 and P4. The I bus and the II bus of the two substations are respectively connected through two lines. This is a complex multi-power distribution network.
For secondary equipment, each switch (incoming switch, outgoing switch and sectional switch) is provided with an override-proof protection device. And one switch is respectively configured at the transformer substations A and B, and the two switches are connected through optical fibers. The protection devices in the substations a and B are connected to the switches in the substations respectively through the electrical ethernet. This constitutes a complete communication system.
Aiming at the configuration of the secondary system, the implementation principle of the fully-adaptive override-prevention protection method is described by a brief flow.
In step 1, a phase-to-phase fault occurs at a fault point F1, and devices L6 and L8 are started at an overcurrent quick-break.
In step 2, the device L6 determines that the forward fault does not receive the latching information, and the overcurrent speed is not delayed. During which level 1 lockout information is sent to the forward superordinate device L2, S1.
and 3, detecting the reverse fault by the device L2 and receiving the class 1 locking information, and delaying the overcurrent speed for class 1. Since there is no upper stage in the reverse direction, no lockout information is sent out.
In step 4, the device S1 detects a forward fault and receives the level 1 latching information, and delays the flow rate by level 1. And simultaneously transmits the level 2 blocking information to the forward superior devices L1, L5.
In step 5, the device L1 detects the reverse fault and receives the level 2 latch message, and the overcurrent speed is delayed by level 2 time. Since there is no upper stage in the reverse direction, no lockout information is sent out.
In step 6, the device L5 determines the forward fault and receives the 2-level latch information from the device S1, and the overcurrent speed is delayed by 2-level time. And simultaneously transmits the level 3 latching information to the forward upper device L1, S1. Since the devices L5 and S1 send the latch message to each other, the device L5 that determines this situation first stops sending the latch message to the device S1, and cancels the delay time of level 2 generated by the device S1.
In step 7, the device L8 determines that the forward fault does not receive the latching information, and the overcurrent speed is not delayed. During which level 1 lockout information is sent to the forward superordinate device L4, S2.
In step 8, the device S2 detects the forward fault and receives the level 1 latching information, and the overcurrent speed is delayed by level 1. And simultaneously transmits the level 2 blocking information to the forward superior devices L7, L3.
In step 9, the device L7 determines the reverse fault and receives the level 2 latch message, and the overcurrent speed is delayed by the level 2 time. And simultaneously transmits level 3 blocking information to the reverse upper device L5.
In step 10, the device L5 determines the forward fault and receives the 3-level latch information of the device L7, and the overcurrent speed is delayed by 3-level time. And simultaneously sends a level 4 lockout message to the forward superordinate device L1.
In step 11, the device L1 receives the level 2 latch information of the device S1 and the level 4 latch information of the device L7 at the same time, and the overcurrent speed is delayed by 4 levels.
In step 12, the locking of the devices L3 and L4 is not described in detail. All protection devices have so far been tripped blocking it until the devices L6, L8 momentarily clear the fault.
In step 13, assuming that device L6 tripped first and device L8 did not trip temporarily, device L6 stops sending lockout messages.
In step 14, the device S1 detects the reverse fault, and sends a lockout message to the reverse superordinate device L2, and no longer sends lockout messages to the forward superordinate devices L1, L5. Meanwhile, the device L5 receives the class 4 latch message, delays the class 4 time by the overcurrent speed interruption, and sends the class 5 latch message to the reverse superior device L2.
And step 15, the system enters a new override-prevention lockout state until the device L8 trips to remove the fault, and the whole system recovers normal operation.
fig. 2 is a logic schematic block diagram of a fully adaptive override protection method suitable for a complex power distribution network according to an embodiment of the present invention.
while the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. A full-adaptive anti-override protection method suitable for a complex power distribution network comprises anti-override protection devices, a switch, communication cables and optical cables, wherein an anti-override rapid communication network is formed among the anti-override protection devices through the switch, the communication cables and the optical cables; the method is characterized in that: the anti-override protection device sends anti-override locking information to any one adjacent protection device which is electrically connected at one time, and the upper and lower level relation on electricity is determined through a communication path between the devices;
the override-proof protection device is used for setting MAC addresses of all power supply branch protection devices for receiving locking information sent by the device, the address of the receiving device is named as a forward receiving MAC address when a forward fault occurs, and the address of the receiving device is named as a reverse receiving MAC address when a reverse fault occurs;
When the two anti-override protection devices mutually transmit the locking information, the device meeting the mutual transmission condition stops transmitting the locking information to the opposite side and discards the received locking information of the opposite side;
the override-proof protection device generates locking signals when detecting faults, if locking information is received at the same time, the two locking signals are subjected to logic operation and then are lifted to a level, then the locking information is sent to a set forward receiving MAC or reverse receiving MAC according to the fault direction, and meanwhile, locking time is generated according to the received locking level, the override-proof protection device is locked for protection and tripping in a delayed mode, and if the locking information is not received, the override-proof protection device directly trips.
2. The fully-adaptive override-prevention protection method suitable for the complex power distribution network according to claim 1, characterized in that: the protection method is suitable for single-power distribution system operation, and double-power or multi-power distribution system split or parallel operation.
3. The fully-adaptive override-prevention protection method suitable for the complex power distribution network according to claim 1, characterized in that: the override-preventing protection device is divided into a line protection device arranged on the incoming line switch and the outgoing line switch and a sectional protection device arranged on the sectional interconnection switch according to the installation position.
4. the fully-adaptive override-prevention protection method suitable for the complex power distribution network according to claim 1, characterized in that: the anti-override protection device is provided with an Ethernet interface and a GOOSE rapid communication function, and anti-override locking information is transmitted between the devices through GOOSE messages.
5. The fully-adaptive override-prevention protection method suitable for the complex power distribution network according to claim 1, characterized in that: the anti-override protection system specifies the positive direction of fault power, points to the line for the bus in the positive direction of the line, and points to the II bus for the I bus in the positive direction of the sectional contact.
6. The fully-adaptive override-prevention protection method suitable for the complex power distribution network according to claim 1, characterized in that: the override-proof protection device is an intelligent device and has analog quantity such as alternating voltage and current acquisition function, input quantity such as switch position acquisition function, output quantity such as relay control function and fault detection function.
7. The fully-adaptive override-prevention protection method suitable for the complex power distribution network according to claim 6, wherein the method comprises the following steps: the override-proof protection device has a fault detection function and can control the switch to remove faults, and not only can detect phase-to-phase faults, but also can detect small-current grounding faults.
8. the fully-adaptive override-prevention protection method suitable for the complex power distribution network according to claim 1, characterized in that: the switch is installed in the communication cabinet, is used for communicating with the override-prevention protection device, and is provided with an electric Ethernet interface and an optical fiber Ethernet interface.
9. The fully-adaptive override-prevention protection method for the complex power distribution network according to claim 8, wherein the method comprises the following steps: the electric Ethernet interface is used for being connected with a protection device, and the optical fiber Ethernet interface is used for being connected with a main communication ring network for long-distance communication.
10. The fully adaptive override protection method for the complex power distribution network according to one of claims 1 to 9, wherein:
The two substations A, B are provided, and two section buses I, II of each substation run in parallel; two sections of buses of the transformer substation A are respectively connected with a first power supply and a second power supply, and two sections of buses of the transformer substation B are respectively connected with a third power supply and a fourth power supply; the I bus and the II bus of the two substations are respectively connected through two lines;
For secondary equipment, an anti-override protection device (L1, L2, L3, L4, L5, L6, L7, L8, S1 and S2) is respectively arranged at each incoming line switch, each outgoing line switch and each section switch; the method comprises the following steps that a switch is arranged in each of a transformer substation A and a transformer substation B, and the two switches are connected through optical fibers; the protection devices in the transformer substations A and B are respectively connected to the switches in the substations through the electric Ethernet;
step 1, when a fault point F1 has a phase-to-phase fault, a sixth override prevention protection device (L6) and an eighth override prevention protection device (L8) are subjected to overcurrent quick-break starting;
Step 2, judging that the forward fault does not receive the locking information by a sixth override-preventing protection device (L6), and performing overcurrent quick-break and non-delay action; during the period, transmitting level 1 blocking information to a second override prevention protection device (L2) and a first override prevention protection device (S1) of the forward superior device;
Step 3, the second override prevention protection device (L2) detects a reverse fault and receives 1-level locking information, and the overcurrent quick interruption delays for 1-level time; the locking information is not sent out because the reverse direction has no upper level;
Step 4, detecting a forward fault and receiving 1-level locking information by the first anti-override protection device (S1), and delaying 1-level time by the overcurrent quick interruption; simultaneously sending 2-level locking information to a first override prevention protection device (L1) and a fifth override prevention protection device (L5) of the forward superior device;
Step 5, the first anti-override protection device (L1) detects a reverse fault and receives 2-level locking information, and the overcurrent speed is interrupted to delay 2-level time; the locking information is not sent out because the reverse direction has no upper level;
Step 6, the fifth override prevention protection device (L5) judges the forward fault and receives the 2-level locking information of the override prevention protection device I (S1), and the overcurrent speed is interrupted and the 2-level time is delayed; simultaneously sending 3-level locking information to a first override prevention protection device (L1) and a first override prevention protection device (S1) of the forward superior device; because the fifth override prevention protection device (L5) and the override prevention protection device I (S1) mutually transmit the locking information, the fifth override prevention protection device (L5) which judges the situation stops transmitting the locking information to the override prevention protection device I (S1) and cancels the delay 2-level time generated by the locking information of the override prevention protection device I (S1);
step 7, the eighth override prevention protection device (L8) judges that the forward fault does not receive the locking information, and the overcurrent quick break does not delay the action; during the period, transmitting level 1 locking information to a fourth override prevention protection device (L4) and a second override prevention protection device (S2) of the forward superior device;
Step 8, detecting a forward fault and receiving 1-level locking information by the second anti-override protection device (S2), and delaying 1-level time by the overcurrent quick interruption; simultaneously sending 2-level locking information to a seventh override prevention protection device (L7) and a third override prevention protection device (L3) of the forward superior device;
step 9, the seventh override prevention protection device (L7) judges the reverse fault and receives 2-level locking information, and the overcurrent speed is interrupted for 2-level time; simultaneously sending 3-level locking information to a fifth override prevention protection device (L5) of the reverse superior device;
Step 10, the fifth override prevention protection device (L5) judges a forward fault and receives 3-level locking information of the seventh override prevention protection device (L7), and the overcurrent speed is interrupted and 3-level time is delayed; simultaneously sending 4-level locking information to a first override prevention protection device (L1) of the forward upper-level device;
11, the first anti-override protection device (L1) simultaneously receives the 2-level latching information of the first anti-override protection device (S1) and the 4-level latching information of the seventh anti-override protection device (L7), and the overcurrent quick-break delays the 4-level time;
12, detecting a reverse fault and receiving 2-level locking information by a third override protection device (L3), delaying 2-level time by overcurrent rapid interruption, and not sending locking information outwards because no upper level exists in the reverse direction; the fourth anti-override protection device (L4) detects reverse faults and receives 1-level locking information, the overcurrent quick-break delays 1-level time, and the locking information is not sent outwards because no upper level exists in the reverse direction; until all the protection devices are tripped in a locking mode, the faults are removed instantaneously by the sixth override prevention protection device (L6) and the eighth override prevention protection device (L8);
Step 13, assuming that the sixth override prevention protection device (L6) trips first and the eighth override prevention protection device (L8) does not trip temporarily, the sixth override prevention protection device (L6) stops sending the locking information;
14, the first anti-override protection device (S1) detects a reverse fault, and sends locking information to a second anti-override protection device (L2) of a reverse superior device, and does not send locking information to a first anti-override protection device (L1) and a fifth anti-override protection device (L5) of a forward superior device any more; meanwhile, 4-level locking information of a fifth override prevention protection device (L5) is received, the overcurrent speed is interrupted for delaying 4-level time, and 5-level locking information is sent to a second override prevention protection device (L2) of a reverse override device;
And step 15, the system enters a new override prevention locking state until the eighth override prevention protection device (L8) trips to remove the fault, and the whole system restores to normal operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811345982.2A CN109412125B (en) | 2018-11-13 | 2018-11-13 | Fully-adaptive override-preventing protection method suitable for complex power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811345982.2A CN109412125B (en) | 2018-11-13 | 2018-11-13 | Fully-adaptive override-preventing protection method suitable for complex power distribution network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109412125A CN109412125A (en) | 2019-03-01 |
| CN109412125B true CN109412125B (en) | 2019-12-06 |
Family
ID=65472750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811345982.2A Active CN109412125B (en) | 2018-11-13 | 2018-11-13 | Fully-adaptive override-preventing protection method suitable for complex power distribution network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109412125B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009887A (en) * | 2019-11-21 | 2020-04-14 | 广西电网有限责任公司贵港供电局 | Multi-stage pilot protection method and system for distribution line |
| CN111416320B (en) * | 2020-03-26 | 2022-10-18 | 南京弘毅电气自动化有限公司 | Multi-power-supply override-preventing tripping system and method based on communication injection waveform |
| CN112803379B (en) * | 2021-01-06 | 2022-07-12 | 云南电网有限责任公司楚雄供电局 | Self-healing method for communication interruption function of override trip prevention system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022995A (en) * | 2012-12-18 | 2013-04-03 | 中煤科工集团重庆研究院 | Mine override trip prevention method |
| CN103078304A (en) * | 2013-01-25 | 2013-05-01 | 上海山源电子电气科技发展有限公司 | Protection method of power distribution network for coal mine |
| CN105490257A (en) * | 2015-12-30 | 2016-04-13 | 神华集团有限责任公司 | Underground safe power supply protection system |
| CN105552858A (en) * | 2015-12-22 | 2016-05-04 | 西安西瑞控制技术股份有限公司 | Fault processing method applying regional blocking for power distribution network |
| CN107370131A (en) * | 2017-07-05 | 2017-11-21 | 成都交大许继电气有限责任公司 | A kind of networking protection system and method for railway distribution system |
-
2018
- 2018-11-13 CN CN201811345982.2A patent/CN109412125B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022995A (en) * | 2012-12-18 | 2013-04-03 | 中煤科工集团重庆研究院 | Mine override trip prevention method |
| CN103078304A (en) * | 2013-01-25 | 2013-05-01 | 上海山源电子电气科技发展有限公司 | Protection method of power distribution network for coal mine |
| CN105552858A (en) * | 2015-12-22 | 2016-05-04 | 西安西瑞控制技术股份有限公司 | Fault processing method applying regional blocking for power distribution network |
| CN105490257A (en) * | 2015-12-30 | 2016-04-13 | 神华集团有限责任公司 | Underground safe power supply protection system |
| CN107370131A (en) * | 2017-07-05 | 2017-11-21 | 成都交大许继电气有限责任公司 | A kind of networking protection system and method for railway distribution system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109412125A (en) | 2019-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109412125B (en) | Fully-adaptive override-preventing protection method suitable for complex power distribution network | |
| US6008971A (en) | Fault protection arrangement for electric power distribution systems | |
| Prasai et al. | Protection of meshed microgrids with communication overlay | |
| CN103022993B (en) | Adaptive cascade direction interlocking relaying method based on GOOSE (Generic Object Oriented Substation Event) | |
| CN102611082B (en) | Self-adaptive feeder neighborhood interactive fault-tolerant relay protection method for power distribution network | |
| US10411462B2 (en) | Medium voltage power supply | |
| CN104113048A (en) | Intelligent protection system of distribution network | |
| CN110739667B (en) | Override trip prevention protection method and system | |
| CN102386615A (en) | Protection system and method for preventing override trip during short-circuit fault in coal mine power supply and distribution system | |
| Shen et al. | Protection coordination analysis of closed-loop distribution system | |
| CN202444323U (en) | Feeder automation system based on optical longitudinal differential protection principle | |
| Schweitzer et al. | Applying radio communication in distribution generation teleprotection schemes | |
| CN113162234B (en) | Direct current combined-hop system based on GOOSE communication and monitoring method | |
| CN103066560B (en) | The method of current protection performance is improved under the short string articulating multi-stage cascade mode of connection | |
| CN111224388B (en) | Node interlocking protection method suitable for multiple power supply modes | |
| CN104009454A (en) | Power grid regional protection method | |
| CN110932244B (en) | Relay protection method for no-switching of all-station protection outlet pressure plates of transformer substation | |
| CN108418193A (en) | The failure service restoration method and system that reclosing is combined with low voltage crossing | |
| JP7181760B2 (en) | Protection control device for AC/DC converter station, protection control system for DC power transmission system, and protection control method for AC/DC converter station | |
| Schweitzer et al. | Communications-assisted schemes for distributed generation protection | |
| CN105914721B (en) | A kind of anti-overstep tripping system and its guard method for more electrical power distribution networks | |
| CN109802431A (en) | A kind of new-energy grid-connected progress control method and system | |
| Benato et al. | Protection requirements in distribution systems with high penetration of DG and possibility of intentional islanding | |
| CN110783898B (en) | AC looped network power supply dynamic acceleration overcurrent protection method and protection device | |
| CN110350499B (en) | Multi-terminal allowable directional pilot protection method and device for power transmission and distribution network |
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 |