CN108923393B - Method for isolating faults in station of station integrated power distribution terminal - Google Patents
Method for isolating faults in station of station integrated power distribution terminal Download PDFInfo
- Publication number
- CN108923393B CN108923393B CN201810651183.1A CN201810651183A CN108923393B CN 108923393 B CN108923393 B CN 108923393B CN 201810651183 A CN201810651183 A CN 201810651183A CN 108923393 B CN108923393 B CN 108923393B
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- Prior art keywords
- interconnection
- module
- line switch
- station
- fault
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000000903 blocking effect Effects 0.000 claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000002955 isolation Methods 0.000 claims abstract description 7
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
Classifications
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- 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
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a method for isolating faults in a station of a comprehensive power distribution terminal of a transformer substation, which comprises the following steps: (1) Collecting voltage and current signals in the station by using a voltage and current collecting module; (2) Establishing an association relation between a blocking signal detection module of the interconnection incoming line switch and a blocking signal control detection module of the interconnection outgoing line switch; (3) When a fault occurs, the control module detects that all fault current signals (4) from a power supply point to the fault point are close to a locking signal module of a communication outgoing line switch of the fault point to send a locking opening signal; (5) The blocking signal detection module of the interconnection incoming line switch blocks an outlet of the interconnection incoming line switch, so that the interconnection incoming line switch is protected from action; (6) The control outlet module of the contact outlet switch performs protection action outlet; the fault is isolated. The invention can perform fault isolation and power supply on site, has low communication dependence and simple structure.
Description
Technical field:
the invention relates to a method for isolating faults in a station, in particular to a method for isolating faults in a station of a comprehensive power distribution terminal of the station, and belongs to the field of feeder automation.
The background technology is as follows:
with the rapid development of market economy and continuous improvement of people living standard, the dependence degree of people on electric energy demands is larger and larger, especially, the ratio of high-rise buildings in cities and users belonging to primary and secondary power supply standards is gradually enlarged, urban functions tend to be perfected and complicated, each large and medium-sized urban power department mostly adopts a primary power distribution structure powered by a multi-power-supply ring network in 10kV power distribution network construction, the power distribution structure has higher power supply reliability and flexible operation, but the cascaded switches are more, and the protection classification cannot pull time step difference, so that the power distribution structure can realize the continuity and reliability of power supply only by relay protection without realizing feeder automation functions, and the proper power distribution automation system is matched, so that the fault treatment of ring network lines can be completed by the existing power distribution automation system at present, but the power distribution automation system is required to rely on a communication and power distribution main station or substation, and has large system, difficult installation and maintenance, difficult replication and popularization, and relatively higher requirements on operation maintenance personnel.
The invention comprises the following steps:
the technical problems to be solved by the invention are as follows: the method for isolating the station faults of the station integrated power distribution terminal can enable a switch closest to a fault point to trip, reduce a power failure area, reduce power failure time and improve power supply reliability.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method of intra-station fault isolation for a station integrated power distribution terminal, comprising the steps of:
(1) The voltage and current acquisition module is used for acquiring line voltage and current signals and transmitting the acquired voltage and current signals to the control module;
(2) Establishing an association relation between a blocking signal detection module of the interconnection incoming line switch and a blocking signal control detection module of the interconnection outgoing line switch by using the control module through an electrical connection relation;
(3) When a fault occurs, the voltage and current acquisition module of the switching equipment can detect all fault current signals from a power supply point to a fault point and transmit the signals to the control module;
(4) At the moment, a locking signal detection module of the contact outgoing line switch close to the fault point sends a locking opening signal, and the locking signal is transmitted to a control module through the detection module;
(5) The blocking signal detection module of the interconnection wire switch receives a blocking opening signal sent by the blocking signal detection module of the interconnection wire switch, and blocks own outlet control;
(6) The control outlet module of the contact outlet switch performs protection action outlet, and the fault is isolated.
The control module judges that the switch is a contact incoming line switch or a contact outgoing line switch through the direction element.
The voltage and current acquisition module is provided with a voltage transformer and a current transformer, the model of the voltage transformer is TR1102-2C, and the model of the current transformer is TR0102-2B.
And the control module transmits the received normal information and fault information of the transformer substation to the background terminal through the communication module.
The invention has the positive beneficial effects that:
1. the invention combines the typical grid structure of the switching station, the interval types of the switching station are divided into the interconnection switch, the outgoing line switch and the bus-tie switch, the terminal judges the interconnection incoming line switch and the interconnection outgoing line switch through the directional element, the association relationship among the interconnection incoming line switch, the interconnection outgoing line switch and the bus-tie switch is established through the electrical node of the locking signal, the interconnection incoming line switch and the outgoing line switch are locked according to the logic of the interconnection outgoing line switch, the interconnection incoming line switch and the outgoing line switch do not need to be matched in a step, and the same time constant value is shared, so that the time step protection of the three-level cascade switching station can be realized under the ring network power supply framework, and the power failure area is reduced.
2. The invention solves the problem that the protection time level difference can not be separated under the condition of a complex network structure, the contact switch and the contact outgoing line switch can share the same time fixed value, and meanwhile, the switch nearest to the fault point trips, thereby reducing the power failure area, reducing the power failure time and improving the power supply reliability.
3. The invention can perform fault isolation and power supply on site, has low communication dependence, simple structure and strong replicability.
Description of the drawings:
FIG. 1 is a schematic diagram of the connection of the in-station fault signal processing and latching signal processing of the present invention;
fig. 2 is a schematic diagram of connection of an embodiment of the present invention.
The specific embodiment is as follows:
the invention is further illustrated and described below with reference to fig. 1, 2 and the specific examples:
examples: a method of intra-station fault isolation for a station integrated power distribution terminal, comprising the steps of:
(1) The voltage and current acquisition module is used for acquiring voltage and current signals in the station and transmitting the acquired voltage and current signals to the control module;
(2) Establishing an association relation between a blocking signal detection module of the interconnection line switch 8DL and a blocking signal control detection module of the interconnection line switch 7DL by using the control module through an electrical connection relation;
(3) When a fault occurs, the voltage and current acquisition module of the switch equipment (7 DL and 8 DL) can detect all fault current signals from a power supply point to a fault point and transmit the signals to the control module;
(4) At this time, the blocking signal of the tie-line switch 7DL near the fault point controls the detection module to send a blocking out signal, and the blocking out signal is transmitted to the control module through the detection module;
(5) After the blocking signal detection module of the interconnection line switch 8DL receives the blocking signal control detection module of the interconnection line switch 7DL to send out a blocking opening signal, blocking own outlet control;
(6) The detection module of the contact line switch 7DL performs a protection action exit, and the fault is isolated.
The control module determines whether the switch is the liaison line switch 8DL or the liaison line switch 7DL through the directional element.
The voltage and current acquisition module is provided with a voltage transformer and a current transformer, the model of the voltage transformer is TR1102-2C, and the model of the current transformer is TR0102-2B.
The control module transmits the received normal information and fault information of the transformer substation to the background terminal through the communication module.
When the device works, a control module on the terminal collects voltage and current signals through a voltage transformer and a current transformer respectively, collects information of a blocking signal detection module, controls blocking signals to control detection of the module signals, when different switch types (a connecting wire switch and a connecting wire switch) detect current signals, the control module judges and controls the connecting wire switch to send blocking opening signals, the connecting wire switch detects blocking signal input, and blocks own outlet control, so that the connecting wire switch acts at an outlet, the connecting wire switch does not act at an outlet, the terminal realizes the protection of the connecting wire switch at a station through logic operation, the connecting wire switch is blocked, and the action of the nearest connecting wire switch at a fault point is isolated from faults, so that the power outage range is reduced.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation and variation of the above embodiment according to the technical matter of the present invention still fall within the scope of the technical solution of the present invention.
Claims (3)
1. A method of intra-station fault isolation for a station integrated power distribution terminal, comprising the steps of:
(1) The voltage and current acquisition module is used for acquiring line voltage and current signals and transmitting the acquired voltage and current signals to the control module;
(2) Establishing an association relation between a blocking signal detection module of the interconnection incoming line switch and a blocking signal control detection module of the interconnection outgoing line switch by using the control module through an electrical connection relation;
(3) When a fault occurs, the voltage and current acquisition modules of the interconnection incoming line switch and the interconnection outgoing line switch can detect all fault current signals from a power supply point to a fault point and transmit the signals to the control module;
(4) At the moment, a locking signal detection module of the contact outgoing line switch close to the fault point sends a locking opening signal, and the locking signal is transmitted to a control module through the detection module;
(5) The blocking signal detection module of the interconnection wire switch receives a blocking opening signal sent by the blocking signal detection module of the interconnection wire switch, and blocks own outlet control;
(6) The control outlet module of the contact outlet switch performs protection action outlet, and faults are isolated;
the control module judges that the switch is an interconnection incoming line switch or an interconnection outgoing line switch through the current direction element.
2. The method for in-station fault isolation of a station integrated power distribution terminal of claim 1, wherein: the voltage and current acquisition module is provided with a voltage transformer and a current transformer, the model of the voltage transformer is TR1102-2C, and the model of the current transformer is TR0102-2B.
3. The method for in-station fault isolation of a station integrated power distribution terminal of claim 1, wherein: and the control module transmits the received normal information and fault information of the power distribution station to the background terminal through the communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810651183.1A CN108923393B (en) | 2018-06-22 | 2018-06-22 | Method for isolating faults in station of station integrated power distribution terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810651183.1A CN108923393B (en) | 2018-06-22 | 2018-06-22 | Method for isolating faults in station of station integrated power distribution terminal |
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| Publication Number | Publication Date |
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| CN108923393A CN108923393A (en) | 2018-11-30 |
| CN108923393B true CN108923393B (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810651183.1A Active CN108923393B (en) | 2018-06-22 | 2018-06-22 | Method for isolating faults in station of station integrated power distribution terminal |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109698554A (en) * | 2019-01-03 | 2019-04-30 | 国网山东省电力公司平邑县供电公司 | Substation equipment Dispatching monitor and control system and method |
| CN109802490A (en) * | 2019-02-21 | 2019-05-24 | 国网山东省电力公司临沂供电公司 | A kind of intelligent platform of substation's electrification fortune inspection |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6055145A (en) * | 1990-12-28 | 2000-04-25 | Eaton Corporation | Overcurrent protection device with visual indicators for trip and programming functions |
| 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 |
| CN103746356A (en) * | 2012-12-21 | 2014-04-23 | 中铁电气化勘测设计研究院有限公司 | Digital communication current protection technology based on IEC 61850 protocol |
| CN105375635A (en) * | 2015-12-02 | 2016-03-02 | 国家电网公司 | Method and system of intelligent management of power distribution network cascading switching stations |
-
2018
- 2018-06-22 CN CN201810651183.1A patent/CN108923393B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6055145A (en) * | 1990-12-28 | 2000-04-25 | Eaton Corporation | Overcurrent protection device with visual indicators for trip and programming functions |
| CN103746356A (en) * | 2012-12-21 | 2014-04-23 | 中铁电气化勘测设计研究院有限公司 | Digital communication current protection technology based on IEC 61850 protocol |
| 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 |
| CN105375635A (en) * | 2015-12-02 | 2016-03-02 | 国家电网公司 | Method and system of intelligent management of power distribution network cascading switching stations |
Non-Patent Citations (1)
| Title |
|---|
| 煤矿井下6kV供电系统防越级跳闸方案研究;许丹等;《煤炭工程》;20131020(第10期);第24-28页 * |
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| CN108923393A (en) | 2018-11-30 |
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