CN114006363A - Arc suppression coil parallel small resistor switching-on and switching-off protection method - Google Patents
Arc suppression coil parallel small resistor switching-on and switching-off protection method Download PDFInfo
- Publication number
- CN114006363A CN114006363A CN202111159674.2A CN202111159674A CN114006363A CN 114006363 A CN114006363 A CN 114006363A CN 202111159674 A CN202111159674 A CN 202111159674A CN 114006363 A CN114006363 A CN 114006363A
- Authority
- CN
- China
- Prior art keywords
- small
- switching
- arc suppression
- parallel
- suppression coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001629 suppression Effects 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 238000013021 overheating Methods 0.000 claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 230000007935 neutral effect Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/08—Limitation or suppression of earth fault currents, e.g. Petersen coil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
A protection method for switching on and off small resistors connected with arc suppression coils in parallel comprises the following steps: s100, monitoring the temperature of the small resistor in real time by adopting an infrared temperature measurement mode at the body part of the complete device with the small resistor connected with the arc suppression coil in parallel, and transmitting the temperature to an intelligent resistor monitor; and S200, switching a resistance overheating hard contact of the resistance intelligent monitor into the arc suppression coil parallel small resistance measurement and control device, and using a resistance overheating hard contact switching-in signal of the resistance intelligent monitor as a condition for starting the small resistance switching-in and switching-out of the arc suppression coil parallel small resistance measurement and control device. The invention provides a protection method for switching on and off small resistors connected in parallel by arc suppression coils, which is a treatment method for failure of switching on and off of resistors in a mode of grounding small resistors connected in parallel by arc suppression coils, is used for solving the potential safety hazard caused by the loss of self protection of a device in the prior art and solving the defects of a measurement and control device for small resistors connected in parallel by the existing arc suppression coils.
Description
Technical Field
The invention relates to the technical field of switching protection, in particular to a switching protection method for a small resistor with parallel arc suppression coils.
Background
In the distribution network, in order to automatically extinguish arcs of most ground faults and reliably remove permanent ground fault lines, the influence of the ground faults on the distribution network is reduced, and partial transformer substations adopt a mode that arc suppression coils are connected in parallel with small resistors to be grounded. The single-phase earth fault processing flow generally comprises the following steps: when the system normally operates, the neutral point is grounded through the arc suppression coil, and when a single-phase grounding fault occurs, the arc suppression coil automatically compensates the system capacitance current, so that the residual current of the fault point is reduced, the grounding fault is promoted to disappear, and the arc grounding overvoltage is restrained. If the earth fault does not disappear within the set compensation time (3-10 s), a small resistor (3-10 s) is put into the zero sequence protection device to be connected with the arc suppression coil in parallel, and the fault circuit is cut off by the action of the zero sequence protection device. At present, the protection of a distribution network system is only considered when single-phase earth faults occur by adopting an arc suppression coil parallel connection small resistor grounding mode, and the protection function of a resistor is lost when switching on and off fails.
The existing arc suppression coil parallel small resistance grounding mode single-phase grounding fault processing flow is as follows: when the system normally operates, the neutral point is grounded through the arc suppression coil, and when a single-phase grounding fault occurs, the arc suppression coil automatically compensates the system capacitance current, so that the residual current of the fault point is reduced, the grounding fault is promoted to disappear, and the arc grounding overvoltage is restrained. If the earth fault does not disappear within the set compensation time (3-10 s), a small resistor (3-10 s) is put into the zero sequence protection device to be connected with the arc suppression coil in parallel, and the fault circuit is cut off by the action of the zero sequence protection device. When the zero sequence protection device does not act or the fault line is not cut off after the small resistor is put into use, the small resistor loses self protection, and the resistor is burnt out due to overheating caused by overlong putting time or frequent putting.
Disclosure of Invention
The invention aims to provide a protection method for switching on and switching off small parallel resistors of an arc suppression coil, which is a treatment method for switching on and switching off the resistors in a grounding mode of connecting the small parallel resistors of the arc suppression coil, is used for solving the potential safety hazard caused by the loss of the protection of a device in the prior art and solving the defects of a measurement and control device for the small parallel resistors of the existing arc suppression coil. Through the improvement of the prior art, the protection function of the small resistor and the arc suppression coil is added when the fault circuit cannot be timely removed when the system is grounded.
The invention is realized by the following technical scheme:
a protection method for switching on and off small resistors connected with arc suppression coils in parallel comprises the following steps:
s100, monitoring the temperature of the small resistor in real time by adopting an infrared temperature measurement mode at the body part of the complete device with the small resistor connected with the arc suppression coil in parallel, and transmitting the temperature to an intelligent resistor monitor;
and S200, switching a resistance overheating hard contact of the resistance intelligent monitor into the arc suppression coil parallel small resistance measurement and control device, and using a resistance overheating hard contact switching-in signal of the resistance intelligent monitor as a condition for starting the small resistance switching-in and switching-out of the arc suppression coil parallel small resistance measurement and control device.
Further, the intelligent resistance monitor sets a resistance overheating alarm fixed value.
Furthermore, the small resistor measurement and control device is connected to the arc suppression coil in parallel through monitoring the parameter index resistor temperature value of the resistor operation in real time, and the measurement and control device controls the small resistor to be switched on or switched off through the switching-on state.
Further, the step S200 includes:
step S210, when the system is earthed in a single phase, the arc suppression coil automatically compensates the system capacitance current, and if the earth fault does not disappear in the set compensation time, a small resistor is put in;
and S220, if the fault line is not cut off, the ground fault still exists, the arc suppression coil parallel small resistance measurement and control device is started to judge whether a resistance overheating opening signal is acquired or not, if no signal is opened, the resistance is cooled to be below the normal working temperature, and if a signal is opened, the arc suppression coil parallel small resistance measurement and control device stops switching the small resistance command again until the opening signal disappears.
Further, the compensation time is 3-10S.
The technical scheme of the invention can realize the following beneficial technical effects:
a method for processing the fault of resistance switching in a mode of grounding an arc suppression coil in parallel with a small resistor is used for solving the potential safety hazard caused by the loss of the protection of a device in the prior art;
an arc suppression coil parallel small resistance device with self protection solves the defects of the existing arc suppression coil parallel small resistance measurement and control device;
through the improvement of the prior art, the protection function of the small resistor and the arc suppression coil is added when the fault circuit cannot be timely removed when the system is grounded.
In summary, the invention provides a protection method for switching on and off a small resistor connected in parallel with an arc suppression coil, which is a processing method for switching on and off the resistor in a grounding mode of the small resistor connected in parallel with the arc suppression coil, is used for solving the potential safety hazard caused by the loss of the protection of a device in the prior art and solving the defects of the existing measurement and control device for switching on and off the small resistor connected in parallel with the arc suppression coil. Through the improvement of the prior art, the protection function of the small resistor and the arc suppression coil is added when the fault circuit cannot be timely removed when the system is grounded.
Drawings
FIG. 1 is a flow chart of a protection method for switching on and off a small resistor connected in parallel with an arc suppression coil.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The invention provides a protection method for switching on and off small resistors connected with arc suppression coils in parallel, which comprises the following steps:
and S100, monitoring the temperature of the small resistor in real time by adopting an infrared temperature measurement mode at the body part of the complete device with the small resistor connected with the arc suppression coil in parallel, and transmitting the temperature to an intelligent resistor monitor.
Specifically, the intelligent resistance monitor sets a resistance overheating alarm fixed value.
And S200, switching a resistance overheating hard contact of the resistance intelligent monitor into the arc suppression coil parallel small resistance measurement and control device, and using a resistance overheating hard contact switching-in signal of the resistance intelligent monitor as a condition for starting the small resistance switching-in and switching-out of the arc suppression coil parallel small resistance measurement and control device.
Specifically, the step S200 includes:
step S210, when the system is earthed in a single phase, the arc suppression coil automatically compensates the system capacitance current, and if the earth fault does not disappear in the set compensation time, a small resistor is put in;
specifically, the compensation time is 3-10S.
And S220, if the fault line is not cut off, the ground fault still exists, the arc suppression coil parallel small resistance measurement and control device is started to judge whether a resistance overheating opening signal is acquired or not, if no signal is opened, the resistance is cooled to be below the normal working temperature, and if a signal is opened, the arc suppression coil parallel small resistance measurement and control device stops switching the small resistance command again until the opening signal disappears.
The monitoring device controls the on and off of the small resistor through the on state by monitoring the important parameter index resistor temperature value of the resistor operation in real time and switching in the small resistor measurement and control device connected with the arc suppression coil in parallel in real time. The invention can effectively reduce the frequent investment of the parallel small resistor, avoid the damage of equipment caused by the accumulated heat of the resistor which is repeatedly input, prolong the service life of the small resistor and ensure the safe operation of the equipment.
The existing arc suppression coil is connected with a small resistor in parallel, a neutral point is grounded through the arc suppression coil when a system normally operates, and when a single-phase grounding fault occurs, the arc suppression coil automatically compensates system capacitance current, so that residual current of a fault point is reduced, the disappearance of a grounding fault is promoted, and arc light grounding overvoltage is restrained. If the earth fault does not disappear within the set compensation time, a small resistor is put into the zero sequence protection device to be connected with the arc suppression coil in parallel, and the zero sequence protection device acts to cut off the fault circuit. The relay protection device fails to operate, and the resistor cannot be effectively protected.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (5)
1. A protection method for switching on and off a small resistor with an arc suppression coil connected in parallel is characterized by comprising the following steps:
s100, monitoring the temperature of the small resistor in real time by adopting an infrared temperature measurement mode at the body part of the complete device with the small resistor connected with the arc suppression coil in parallel, and transmitting the temperature to an intelligent resistor monitor;
and S200, switching a resistance overheating hard contact of the resistance intelligent monitor into the arc suppression coil parallel small resistance measurement and control device, and using a resistance overheating hard contact switching-in signal of the resistance intelligent monitor as a condition for starting the small resistance switching-in and switching-out of the arc suppression coil parallel small resistance measurement and control device.
2. The arc suppression coil parallel small-resistor switching protection method according to claim 1, wherein the resistor intelligent monitor sets a resistor overheating alarm constant value.
3. The protection method for switching on and off the small resistors connected in parallel with the arc suppression coil as claimed in claim 2, wherein the small resistor measurement and control device connected in parallel with the arc suppression coil is switched in real time by monitoring a parameter index resistor temperature value of the resistor operation in real time, and the measurement and control device controls the switching on and off of the small resistors through the switching-in state.
4. A method for protecting an arc suppression coil in parallel connection with a small resistor according to claim 3, wherein the step S200 comprises:
step S210, when the system is earthed in a single phase, the arc suppression coil automatically compensates the system capacitance current, and if the earth fault does not disappear in the set compensation time, a small resistor is put in;
and S220, if the fault line is not cut off, the ground fault still exists, the arc suppression coil parallel small resistance measurement and control device is started to judge whether a resistance overheating opening signal is acquired or not, if no signal is opened, the resistance is cooled to be below the normal working temperature, and if a signal is opened, the arc suppression coil parallel small resistance measurement and control device stops switching the small resistance command again until the opening signal disappears.
5. A method for protecting an arc suppression coil in parallel connection with a small resistor as claimed in claim 4, wherein said compensation time is 3-10S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111159674.2A CN114006363A (en) | 2021-09-30 | 2021-09-30 | Arc suppression coil parallel small resistor switching-on and switching-off protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111159674.2A CN114006363A (en) | 2021-09-30 | 2021-09-30 | Arc suppression coil parallel small resistor switching-on and switching-off protection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114006363A true CN114006363A (en) | 2022-02-01 |
Family
ID=79922180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111159674.2A Pending CN114006363A (en) | 2021-09-30 | 2021-09-30 | Arc suppression coil parallel small resistor switching-on and switching-off protection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114006363A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5629658A (en) * | 1992-08-18 | 1997-05-13 | Chen; William W. | Methods of arc suppression and circuit breakers with electronic alarmers |
| US20140055886A1 (en) * | 2012-08-24 | 2014-02-27 | Schneider Electric USA, Inc. | Circuit breaker signaling system for control of an arc fault detection system |
| CN104779705A (en) * | 2015-05-06 | 2015-07-15 | 特变电工湖南智能电气有限公司 | Line protection measurement and control method and device |
| DE102015208470A1 (en) * | 2015-05-07 | 2016-11-10 | Siemens Aktiengesellschaft | Electric coil device for current limitation |
| CN107069663A (en) * | 2017-04-14 | 2017-08-18 | 思源电气股份有限公司 | Applied to the small resistor intelligent protection system in neutral flexible grounding mode |
| CN111446688A (en) * | 2020-04-23 | 2020-07-24 | 安徽广祺智能电器股份有限公司 | Transformer substation dynamic small resistor in-situ protection controller and application method thereof |
| CN112485655A (en) * | 2020-10-29 | 2021-03-12 | 国网湖北省电力有限公司电力科学研究院 | Accurate monitoring device and method for tripping and closing loop of substation circuit breaker |
-
2021
- 2021-09-30 CN CN202111159674.2A patent/CN114006363A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5629658A (en) * | 1992-08-18 | 1997-05-13 | Chen; William W. | Methods of arc suppression and circuit breakers with electronic alarmers |
| US20140055886A1 (en) * | 2012-08-24 | 2014-02-27 | Schneider Electric USA, Inc. | Circuit breaker signaling system for control of an arc fault detection system |
| CN104779705A (en) * | 2015-05-06 | 2015-07-15 | 特变电工湖南智能电气有限公司 | Line protection measurement and control method and device |
| DE102015208470A1 (en) * | 2015-05-07 | 2016-11-10 | Siemens Aktiengesellschaft | Electric coil device for current limitation |
| CN107069663A (en) * | 2017-04-14 | 2017-08-18 | 思源电气股份有限公司 | Applied to the small resistor intelligent protection system in neutral flexible grounding mode |
| CN111446688A (en) * | 2020-04-23 | 2020-07-24 | 安徽广祺智能电器股份有限公司 | Transformer substation dynamic small resistor in-situ protection controller and application method thereof |
| CN112485655A (en) * | 2020-10-29 | 2021-03-12 | 国网湖北省电力有限公司电力科学研究院 | Accurate monitoring device and method for tripping and closing loop of substation circuit breaker |
Non-Patent Citations (1)
| Title |
|---|
| 谭秀炳: "铁路电力与牵引供电系统继电保护", 西南交通大学出版社, pages: 224 - 225 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1228907A (en) | Power line transient surge suppressor | |
| CN103545796A (en) | Single-phase grounding fault handling device and method for power distribution network with non-effectively grounded neutral points | |
| CN206533136U (en) | 220kV transformer stations arc suppression coil parallel low resistance earthed system | |
| CN103354352B (en) | A kind of power distribution network safety protection method based on distributed intelligence | |
| CN108879645A (en) | A kind of arc suppression coil and pro-active intervention arc-extinction device paired running device and method | |
| CN213484514U (en) | Active intervention type arc suppression device for single-phase earth fault treatment | |
| CN106374445B (en) | The small current grounding fault processing method of line selection apparatus and protection reclosing cooperation | |
| CN103837798A (en) | Quick diagnostic method and processing device of power distribution network single-phase earth fault characters | |
| CN212137285U (en) | Initiative intervention type arc extinction device based on intelligence ground connection technique | |
| CN111817281B (en) | Switching control system and method for arc suppression coil parallel low-resistance grounding device | |
| CN210780092U (en) | Arc and harmonic elimination device | |
| CN105375436A (en) | Automatic cutoff protection apparatus and method for overtime operation of neutral-point resistor cabinet | |
| CN114006363A (en) | Arc suppression coil parallel small resistor switching-on and switching-off protection method | |
| CN112269145B (en) | Zero potential fault clearing method and system for power distribution network | |
| CN112003275B (en) | Safe power supply system and method | |
| CN110212511B (en) | 66kV arc suppression coil grounding system based on resistance remote automatic switching | |
| CN204794071U (en) | Digital arc extinction cabinet | |
| CN111890990A (en) | Electric locomotive pantograph-catenary protection control method and system | |
| CN107192919B (en) | Power distribution network feed line protection device and method with self-identification grounding mode | |
| CN112117747A (en) | Ground fault current hybrid compensation system and matching method | |
| CN110854804A (en) | Power supply comprehensive protection device | |
| RU2779875C1 (en) | Method for controlling circuit breakers in high and extra high voltage networks with power electromagnetic devices | |
| CN219498953U (en) | Single-phase earth fault processing system of power distribution network | |
| US4860150A (en) | Protector network for A-C equipment | |
| CN100442617C (en) | Human body electrification protecting method and apparatus for small current system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |