CN104104077B - 20kV neutral grounding in distribution power network method for handover control and device - Google Patents
20kV neutral grounding in distribution power network method for handover control and device Download PDFInfo
- Publication number
- CN104104077B CN104104077B CN201410377984.5A CN201410377984A CN104104077B CN 104104077 B CN104104077 B CN 104104077B CN 201410377984 A CN201410377984 A CN 201410377984A CN 104104077 B CN104104077 B CN 104104077B
- Authority
- CN
- China
- Prior art keywords
- fault
- resistance
- switching
- threshold values
- grounding
- 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
Abstract
The invention discloses a kind of 20kV neutral grounding in distribution power network method for handover control and device, ground connection pattern is selected according to electric network capacitance and current value, resistance eutral grounding pattern is selected to force switching resistance other logical judgment of locking if capacitance current is more than threshold values, if capacitance current is less than threshold values and selects neutral flexible grounding pattern, under this pattern, fault signature is carried out by voltage, electric current real-time monitoring and type judges, simultaneously to the special circumstances being likely to occur in electrical network, such as high resistance earthing fault, intermittent grounding fault are judged.If switching resistance is started according to above judgement, carry out the control of resistance switching moment, pass through the resistance switching loop detection confirmation accurate switching of resistance simultaneously.
Description
Technical field
The invention belongs to autocontrol method and device field, more precisely it is related to a kind of 20kV power network neutral point
Earthing mode method for handover control and device.
Background technology
In recent years, carried out the technical feasibility of 20kV electric pressure networking in China some areas and economy was superior
Property has been proved.In 20kV power distribution network actual motion, neutral point adopts grounding through arc mode, exists during fault no
Method realizes quickly and accurately failure line selection and positioning, if operating with failure for a long time, due to partly former 10kV boosting and transformation equipment
Insulating requirements cannot being met it is likely that causing the weak link of insulation to puncture, developing into phase fault, making fault spread.
And adopt low resistance grounding mode, and once there is the fault of earthing type in power distribution network, then no matter transient fault or forever
Fault, the chopper that faulty line is located must first implement a trip operation, and power supply reliability is impacted.
The problem existing for single earthing mode, the neutral point that domestic and international experts and scholars propose is through arc suppression coil electricity in parallel
The neutral flexible grounding mode of resistance, can monitor operation of power networks state by control device and be grounded mode according to different faults feature
Switch in short-term.But there is single residual voltage criterion in actual applications and easily cause control device misoperation；Undocked ground mode
The convert resistance switching moment carries out selecting easily electrical network to be caused overvoltage to impact；Not to resistance switching loop fault, high resistance ground,
The special circumstances such as transient fault are repeatedly occurred to be judged and process in short time, the reliability service of impact device.Therefore set
Count that a kind of sample frequency is high, breakdown judge accurately, low-power consumption, low cost, cope with the special circumstances that electrical network is likely to occur
Control device, the power supply reliability of lifting distribution system meets the requirement of device security simultaneously.
Content of the invention
For 20kV neutral grounding in distribution power network switching device high cost in prior art, and there is single zero sequence electricity
Pressure criterion easily causes control device misoperation；The undocked ground mode convert resistance switching moment carries out selecting easily electrical network to be caused
Voltge surge；Not to resistance switching loop fault, high resistance ground, the special circumstances such as transient fault in the short time, are repeatedly occurred to enter
The problems such as row judges the reliability service comprehending impact device with place, the present invention provides a kind of 20kV neutral grounding in distribution power network
Method for handover control and device.
Specifically, the present invention adopts technical scheme as described below：
First, the invention discloses a kind of 20kV neutral grounding in distribution power network method for handover control it is characterised in that
The method comprising the steps of：
a）Analog acquisition, device centering point electric current, electrical network residual voltage Real-time Collection and calculating are processed；
b）Capacitance current is monitored, and device passes through the sampled data of communication module real-time reception capacitance current testing equipment；
c）Ground connection model selection, is controlled to whether entering flexible switching ground connection pattern；
d）Send resistance switching order, judge to control triggering resistance switching when above, the entrance resistance switching moment controls；
e）Switching value, completes the detection of resistance switching loop, and to resistance, whether successful switching confirms,
Wherein in step c）In, the capacitance current detected value that obtained according to control device real-time communication, if capacitance current is little
Meeting to compensate in 100A requires then control device entrance flexibly to switch ground connection pattern；If be unsatisfactory for compensating more than 100A requiring, control
Device processed will force switching resistance to switch to resistance eutral grounding pattern, sends resistance switching signal, and locking neutral flexible grounding mode
Correlated judgment logic.
In above method, flexibly switching ground connection pattern includes device interruption sampling, completes fault signature and type simultaneously
The step judging, if wherein monitoring fault signature voltage is more than threshold values and fault signature electric current and is more than threshold values, judge electrical network this
When break down, and fault type judgement is carried out by the detection of fault signature persistent period, if fault signature is detected continuing
Time is more than threshold values, is judged as that electrical network occurs permanent fault, sends resistance switching order, and switching neutral grounding mode is electricity
Resistance ground connection；If the fault signature persistent period is less than threshold values, it is judged as that electrical network occurs transient fault, electrical network still maintains former arc blowout wire
Circle earthing mode, and carry out high resistance earthing fault judgement.
Further, if high resistance earthing fault judges the step failure judgement persistent period more than 100s and this section of time internal resistance
Switching frequency more than 3 times, then judges high resistance earthing fault to occur and triggers resistance switching barring program, otherwise then carries out intermittence
Earth fault judges.
Further, described high resistance earthing fault judges to comprise the following steps：
c11）Activation system clock timing, recorded to the persistent period that high resistive fault occurs；
c12）Detection resistance loop action message, if there is not high resistance earthing fault in electrical network, passing through switching resistance, increasing
Major break down current protective device action message excises faulty line, and fault characteristic value disappears；
c13）By system clock record start time and resistance success switching frequency；
c14）Fault signature judges, whether has excised faulty line, fault signature disappearance electrical network is extensive after judging resistance switching
Multiple normal operation；
c15）Resistance switching frequency judges, resistance switching returns through time delay, if now fault signature still exists, controls dress
Put and will be again started up resistance switching；
c16）If resistance switching frequency is more than 3 times, by the system clock end of record moment, when calculating fault features continue
Between exceed threshold values then latch-up resistance switching, simultaneously by screen report to the police inform operations staff.
Preferably, intermittent grounding fault judges to include to occurring transient fault to count in the unit interval, secondary
Number judges intermittent grounding fault to occur and forces switching resistance after exceeding threshold values, carries out failure line selection excision earth fault, if
It is not above threshold value to be then again introduced into flexibly switching ground connection pattern.
Further, intermittent grounding fault judges to comprise the following steps：
c21）Activation system clock timing, recorded to the persistent period that intermittence earth fault fault occurs；
c22）Whether the failure judgement persistent period is less than setting valve more than 0, that is, judge whether electrical network occurs transient fault；
c23）By system clock record start time and transient fault number of times；
c24）Transient fault number of times judges, if there are 5 transient faults, by the system clock end of record moment,
The calculating fault features persistent period exceedes threshold values and sends resistance switching order, and informs operations staff.
Further, in step e）In switching value, if confirming resistance success switching, sending and showing successful switching
Signal, if not having successful switching, sends switching failure alarm signal.
The invention also discloses a kind of 20kV neutral grounding in distribution power network switching control is it is characterised in that institute
State device and include control process module, power module, Analog input mModule, voltage zero-cross comparison module, intake input mould
Block, intake output module, data memory module, communication module, data disaply moudle, wherein Analog input mModule completes electricity
The sampling of current voltage, voltage signal is nursed one's health into the pulse letter being available for that control device catches zero-acrross ing moment by voltage zero-cross comparison module
Number, switching input module completes the monitoring of neutral resistor fling-cut switch state, and communication module ensures and other device energy
Enough carry out data transmission and communication.
Beneficial effect：Method of the present invention sample frequency is high, breakdown judge accurately, low-power consumption, low cost, cope with electricity
The control device of the special circumstances that net is likely to occur, the power supply reliability of lifting distribution system meets device security simultaneously
Requirement.
Brief description
Fig. 1 is the flow chart that 20kV neutral grounding in distribution power network method for handover control realizes program；
Fig. 2 is control device Design of Hardware Architecture figure；
Fig. 3 is the programming flowchart of high resistance earthing fault detection；
Fig. 4 is the programming flowchart of intermittence Earth Fault Detection.
Specific embodiment
The present invention solves 20kV neutral grounding in distribution power network switching device high cost in prior art, and exists single
One residual voltage criterion easily causes control device misoperation；The undocked ground mode convert resistance switching moment carries out selecting easily to electricity
Net causes overvoltage to impact；Not to resistance switching loop fault, high resistance ground, in the short time, repeatedly there is the spies such as transient fault
Different situation carries out judging comprehending the problem of the reliability service of impact device with place.
In the method for the present invention, relate to several functions module, including ground connection mode selecting method, fault signature judgement side
Method, fault type determination methods, resistance switching return circuit detection method, resistance switching moment control method, high resistance earthing fault are sentenced
Disconnected method, intermittent grounding fault determination methods.Its control flow is：Ground connection pattern is selected according to electric network capacitance and current value, if
Capacitance current is more than threshold values and selects resistance eutral grounding pattern to force switching resistance other logical judgment of locking.If capacitance current is less than
Threshold values selects neutral flexible grounding pattern, carries out fault signature by voltage, electric current real-time monitoring and type judges, simultaneously under this pattern
To the special circumstances being likely to occur in electrical network, such as high resistance earthing fault, intermittent grounding fault are judged.According to more than
If judge to start switching resistance, carry out the control of resistance switching moment, pass through the detection of resistance switching loop simultaneously and confirm that resistance is accurate
Really switching.Its corresponding control method is specific as follows：
1. it is grounded mode selecting method
Control device real-time communication obtains the capacitance current detected value of capacitance current testing equipment, if capacitance current is less than
100A meets compensation and requires then control device entrance flexibly to switch ground connection pattern.If be unsatisfactory for compensating more than 100A requiring, control
Device will force switching resistance to switch to the correlated judgment logic that resistance eutral grounding pattern locking earthing mode switches.The method can
Actively switch to resistance eutral grounding pattern when grid equipment cannot meet condenser current compensation requirement it is ensured that electric power netting safe running.
2. fault signature and type judgement method
Control device enters flexibly switching ground connection pattern and then carries out fault signature and type by voltage, electric current real-time monitoring
Judge.If monitoring fault signature voltage is more than threshold values and fault signature electric current is more than threshold values, judge that electrical network now breaks down,
And fault type judgement is carried out by the detection of fault signature persistent period.If the fault signature persistent period is detected to be more than valve
Value, is judged as that electrical network occurs permanent fault, sends resistance switching order, switching neutral grounding mode is resistance eutral grounding.If
The fault signature persistent period is less than threshold values, is judged as that electrical network occurs transient fault, electrical network still maintains former grounding through arc side
Formula.Criterion sets as follows：1）Fault type criterion：By setting time delay condition, fault type is judged, former when detecting
The barrier persistent period is more than or equal to 2s, is judged as that electrical network occurs permanent fault, and it is then transient fault that the persistent period is less than 2s.
2）Fault signature principal voltage criterion：＞ 20%-30%*UN.3）Fault signature auxiliary current criterion：＞ 6A.More than set
The parameter put can be made suitably modified according to field operational data.The method can effectively solve the problem that list using voltage x current combination criterion
There is the deficiency of malfunction in one voltage criterion.
3. resistance switching moment control method
After control device sends resistance switching order, the resistance switching moment need to be controlled.The resistance switching moment controls
Module passes through the pulse signal that detection is formed through voltage zero-cross comparison module, catches zero-acrross ing moment calculating pulse width and obtains voltage
Signal frequency.Calculate leading time the intrinsic movement time according to closing circuit in real time it is ensured that resistance is in residual voltage zero passage
Accurately put into.The method ensures that resistance puts in residual voltage zero passage, can effectively reduce the overvoltage impact to electrical network.
4. resistance switching return circuit detection method
After resistance switching, whether control device need to put into resistance and carry out detection confirmation.Resistance switching loop detection module leads to
Cross switching value acquisition module and real-time monitoring is carried out to switch closed condition.The switch failure if occurring resistance switching order to send
Situation fails switch closed condition amount is detected, and is able to detect that voltage exceedes threshold values for a long time, then control device needs to send out
Go out alarm signal, and set 20s time delay to pass through to control relay protection device to jump main transformer three side switch excision fault bus.
5. high resistance earthing fault determination methods
Control device select neutral flexible grounding mode operation during need in electrical network it may happen that special circumstances high resistance ground
Fault carries out real-time detection judgement.The feature that control device is directed to high resistance earthing fault arranges resistance switching locking criterion, when event
The barrier persistent period, more than 100s and this section of time internal resistance switching frequency judged more than 3 times high resistance earthing fault triggering resistance
Switching barring program.Triggering alarm staff searches fault simultaneously.
6. intermittent grounding fault determination methods
Control device select neutral flexible grounding mode operation during need in electrical network it may happen that special circumstances intermittence connect
Earth fault carries out real-time detection judgement.Control device, to occurring transient fault to count in the unit interval, exceedes in number of times
Judge after threshold values to occur intermittent grounding fault to force switching resistance, carry out failure line selection excision earth fault.
The invention also discloses a kind of 20kV neutral grounding in distribution power network switching over control using said method
Switching control, it includes the monitor controller being arranged on Control Room and the electric network capacitance and current detection being arranged on transformer station
Device.Described monitor controller mainly includes control process module, power module, Analog input mModule, voltage zero-cross ratio
Compared with module, clock module, intake output module, data memory module, communication module, data disaply moudle etc..Wherein core
Control process module selects high-performance, low cost, the STM32F103ZET6 chip of low-power consumption.This control device can pass through mould
Analog quantity input module completes voltage, current sample；By voltage zero-cross comparison module, voltage signal is nursed one's health into and be available for controller
Catch the pulse signal of zero-acrross ing moment；Neutral resistor fling-cut switch status monitoring is completed by switching input module；Communication
Module ensures can carry out data transmission and communication with other devices.
For making the purpose of the present invention, method for designing and advantage clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is the 20kV neutral grounding in distribution power network method for handover control flow chart of realizing program of the present invention,
During the realization of control method, comprise the following steps：
（1）System initialization, after device starts, to electricity on modules, clear data cached, initializing variable, completes
Required variable initializer show various to program of device.
（2）Analog acquisition, device centering point electric current, electrical network residual voltage Real-time Collection and calculating are processed.
（3）Capacitance current is monitored, and device passes through the sampled data of communication module real-time reception capacitance current testing equipment.
（4）Ground connection model selection, is controlled to whether entering flexible switching ground connection pattern.Led in real time according to control device
Interrogate the capacitance current detected value obtaining, if capacitance current is less than 100A and meets compensation requirement, control device enters flexibly switching and connects
Ground mode.If be unsatisfactory for compensating more than 100A requiring, control device will force switching resistance to switch to resistance eutral grounding pattern locking
The correlated judgment logic of earthing mode switching.
（5）Device interrupts sampling, completes fault signature simultaneously and type judges.If monitoring fault signature voltage is more than threshold values
And fault signature electric current is more than threshold values, then judge that electrical network now breaks down, and entered by the detection of fault signature persistent period
Row fault type judges.If the fault signature persistent period is detected to be more than threshold values, being judged as that electrical network occurs permanent fault, sending
Resistance switching order, switching neutral grounding mode is resistance eutral grounding.If the fault signature persistent period is less than threshold values, it is judged as electricity
There is transient fault in net, electrical network still maintains former grounding through arc mode.
（6）Whether high resistance earthing fault judges, occur high resistance earthing fault to carry out in electrical network by recursive call subprogram
Real-time judge.When electrical network occurs high resistance earthing fault, zero-sequence current voltage exceedes setting valve and switching resistance, but because of fault current
Little and lead to protective relaying device and line selection apparatus to fail action message, and the time delay of resistance switching loop returns and recovers to arc blowout wire
Circle ground connection.Now fault signature still presence will lead to resistance that switching is repeated several times.Control device is directed to and high resistance ground event occurs
Barrier setting resistance switching locking, when trouble duration, more than 100s and this section of time internal resistance switching frequency judges more than 3 times
There is high resistance earthing fault triggering resistance switching barring program.Triggering alarm staff searches fault simultaneously.
（7）Intermittent grounding fault judges, whether intermittent grounding fault occurs by recursive call subprogram to electrical network
Carry out real-time judge.To occurring transient fault to count in the unit interval, judge interval after number of times exceedes threshold values
Property earth fault force switching resistance, carry out failure line selection excision earth fault.Can arrange occur in every 10s more than 5 times instantaneous
Property fault, enter resistance switching program.
（8）Send resistance switching order, judge to control triggering resistance switching when above, the entrance resistance switching moment controls.
Resistance switching moment control module passes through the pulse signal that detection is formed through voltage zero-cross comparison module, catches zero-acrross ing moment and calculates
Pulse width obtains voltage signal frequency.Leading time is calculated in real time according to intrinsic movement time of closing circuit it is ensured that resistance
Accurately put in residual voltage zero passage.
（9）Switching value, completes the detection of resistance switching loop, and to resistance, whether successful switching confirms.Resistance is thrown
Switchback road detection module carries out real-time monitoring by switching value acquisition module to switch closed condition.If there is resistance switching order
Send and the situation of switch failure, now fail switch closed condition amount is detected, and be able to detect that voltage exceedes for a long time
Threshold values, then control device need to send alarm signal, and set 20s time delay by control relay protection device jump main transformer three side open
Close excision fault bus.If successful switching, operations staff is informed by screen and display lamp.
Fig. 2 is the Design of Hardware Architecture figure of the 20kV neutral grounding in distribution power network switching control of the present invention.Its
Including the monitor controller being arranged on Control Room and the electric network capacitance and current detection means being arranged on transformer station.Described monitoring control
Device processed mainly include control process module, power module, Analog input mModule, voltage zero-cross comparison module, clock module,
Intake output module, data memory module, communication module, data disaply moudle etc..Wherein core control process module selects
High-performance, low cost, the STM32F103ZET6 chip of low-power consumption.This control device can be completed by Analog input mModule
Voltage, current sample；By voltage zero-cross comparison module, voltage signal is nursed one's health into the arteries and veins being available for that controller catches zero-acrross ing moment
Rush signal；Neutral resistor fling-cut switch status monitoring is completed by switching input module；Communication module ensures and other dresses
Put and can carry out data transmission and communication.
Fig. 3 is high resistance earthing fault detection subroutine design flow chart in the present invention.Detection trouble duration exceedes
100s and this section of time internal resistance switching frequency resistance barring program of the triggering more than 3 times, trigger alarm staff simultaneously
Search fault.Comprise the following steps：
（1）Initialization, completes the initialization of variable and intervalometer in this subprogram.
（2）Activation system clock timing, recorded to the persistent period that high resistive fault occurs.
（3）Detection resistance loop action message, if there is not high resistance earthing fault in electrical network, passing through switching resistance, increasing
Major break down current protective device action message excises faulty line, and fault characteristic value disappears.
（4）By system clock record start time and resistance success switching frequency.
（5）Fault signature judges, whether has excised faulty line, fault signature disappearance power system restoration after judging resistance switching
Normal operation.
（6）Resistance switching frequency judges, resistance switching returns through time delay, if now fault signature still exists, controls dress
Put and will be again started up resistance switching.
（7）If resistance switching frequency is more than 3 times, by the system clock end of record moment, when calculating fault features continue
Between exceed threshold values then latch-up resistance switching, simultaneously by screen report to the police inform operations staff.
Fig. 4 is the design flow diagram of property Earth Fault Detection subprogram in intermediate gap of the present invention, and controller is in the unit interval
Occur transient fault to be counted, after reaching setting valve, force switching resistance, carry out failure line selection excision earth fault.Can
Arrange in every 10s and more than 5 times transient faults occur, enter resistance switching program.Comprise the following steps：
（1）Initialization, completes the initialization of variable and intervalometer in this subprogram.
（2）Activation system clock timing, recorded to the persistent period that intermittence earth fault fault occurs.
（3）Whether the failure judgement persistent period is less than setting valve more than 0, that is, judge whether electrical network occurs transient fault.
（4）By system clock record start time and transient fault number of times.
（5）Transient fault number of times judges, if there are 5 transient faults, by the system clock end of record moment, counts
The calculation fault signature persistent period exceedes threshold values and sends resistance switching order, and informs operations staff by screen warning.
Above in conjunction with accompanying drawing and instantiation, embodiments of the present invention are described in detail, but the present invention does not limit
In above-mentioned embodiment, in the ken that art those of ordinary skill possesses, can also be without departing from this
Make a variety of changes on the premise of invention objective.
Claims (6)
1. a kind of 20kV neutral grounding in distribution power network method for handover control is it is characterised in that methods described includes following step
Suddenly：
a）Analog acquisition, device centering point electric current, electrical network residual voltage Real-time Collection and calculating are processed；
b）Capacitance current is monitored, and device passes through the sampled data of communication module real-time reception capacitance current testing equipment；
c）Ground connection model selection, is controlled to whether entering flexible switching ground connection pattern；
d）Send resistance switching order, judge to control triggering resistance switching when above, the entrance resistance switching moment controls；
e）Switching value, completes the detection of resistance switching loop, and to resistance, whether successful switching confirms,
Wherein in step c）In, the capacitance current detected value that obtained according to control device real-time communication, if capacitance current is less than
100A meets compensation and requires then control device entrance flexibly to switch ground connection pattern；If be unsatisfactory for compensating more than 100A requiring, control
Device will force switching resistance to switch to resistance eutral grounding pattern, sends resistance switching signal, and the phase of locking earthing mode switching
Close decision logic, wherein said flexible switching ground connection pattern includes device and interrupts sampling, completes fault signature simultaneously and type is sentenced
Disconnected step, if wherein monitoring fault signature voltage is more than threshold values and fault signature electric current is more than threshold values, judges electrical network now
Break down, and fault type judgement carried out by the detection of fault signature persistent period, if detect fault signature continue when
Between be more than threshold values, be judged as electrical network occur permanent fault, send resistance switching order, switching neutral grounding mode be resistance
Ground connection；If the fault signature persistent period is less than threshold values, it is judged as that electrical network occurs transient fault, electrical network still maintains former arc suppression coil
Earthing mode, and carry out high resistance earthing fault judgement.
If 2. 20kV neutral grounding in distribution power network method for handover control as claimed in claim 1 is it is characterised in that high resistant
Earth fault judges the step failure judgement persistent period more than 100s and this section of time internal resistance switching frequency is more than 3 times, then sentence
Disconnected generation high resistance earthing fault simultaneously triggers resistance switching barring program, otherwise then carries out intermittent grounding fault judgement.
3. 20kV neutral grounding in distribution power network method for handover control as claimed in claim 2 is it is characterised in that described height
Resistance earth fault judges to comprise the following steps：
c11）Activation system clock timing, recorded to the persistent period that high resistive fault occurs；
c12）Detection resistance loop action message, if there is not high resistance earthing fault in electrical network, passing through switching resistance, increasing event
Barrier current protective device action message excision faulty line, fault characteristic value disappears；
c13）By system clock record start time and resistance success switching frequency；
c14）Fault signature judges, whether has excised faulty line, fault signature disappearance power system restoration is just after judging resistance switching
Often run；
c15）Resistance switching frequency judges, resistance switching returns through time delay, if now fault signature still exists, control device will
It is again started up resistance switching；
c16）If resistance switching frequency is more than 3 times, by the system clock end of record moment, the calculating fault features persistent period surpasses
Cross threshold values then latch-up resistance switching, reported to the police by screen simultaneously and inform operations staff.
4. 20kV neutral grounding in distribution power network method for handover control as claimed in claim 2 is it is characterised in that intermittence
Earth fault judges to include, to occurring transient fault to count in the unit interval, to judge between generation after number of times exceedes threshold values
Having a rest property earth fault simultaneously forces switching resistance, carrying out failure line selection excision earth fault, if being not above threshold values, being again introduced into
Flexibly switching ground connection pattern.
5. 20kV neutral grounding in distribution power network method for handover control as claimed in claim 4 is it is characterised in that intermittence
Earth fault judges to comprise the following steps：
c21）Activation system clock timing, recorded to the persistent period that intermittence earth fault fault occurs；
c22）Whether the failure judgement persistent period is less than setting valve more than 0, that is, judge whether electrical network occurs transient fault；
c23）By system clock record start time and transient fault number of times；
c24）Transient fault number of times judges, if there are 5 transient faults, by the system clock end of record moment, calculates
The fault signature persistent period exceedes threshold values and sends resistance switching order, and informs operations staff.
6. the 20kV neutral grounding in distribution power network method for handover control as any one of claim 1 to 5, its feature
It is, step e）In switching value, if confirming resistance success switching, send the signal showing successfully switching, if not success
Switching then sends switching failure alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410377984.5A CN104104077B (en) | 2014-08-04 | 2014-08-04 | 20kV neutral grounding in distribution power network method for handover control and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410377984.5A CN104104077B (en) | 2014-08-04 | 2014-08-04 | 20kV neutral grounding in distribution power network method for handover control and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104104077A CN104104077A (en) | 2014-10-15 |
| CN104104077B true CN104104077B (en) | 2017-03-08 |
Family
ID=51671990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410377984.5A Active CN104104077B (en) | 2014-08-04 | 2014-08-04 | 20kV neutral grounding in distribution power network method for handover control and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104104077B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759179B (en) * | 2016-04-28 | 2019-08-16 | 四川瑞霆电力科技有限公司 | Based on zero sequence transient analysis low current neutral grounding system fault positioning system and method |
| CN106655120A (en) * | 2016-11-30 | 2017-05-10 | 孙嘉宁 | Intelligent ground protection method and system for neutral point of power distribution network |
| CN109599827A (en) * | 2018-11-21 | 2019-04-09 | 宁波恒晨电力建设有限公司 | Power network neutral point dynamic earth fault method and system based on big data |
| CN109917230B (en) * | 2019-04-08 | 2020-09-01 | 重庆大学 | Grounding fault monitoring and protection integrated method for neutral point resistance-containing grounding power distribution network |
| CN110783923B (en) * | 2019-11-26 | 2021-10-29 | 广东电网有限责任公司广州供电局 | Transformer substation main transformer neutral point connection processing method and system |
| CN111404137B (en) * | 2020-04-22 | 2022-07-05 | 国网安徽省电力有限公司 | Distribution network flexible ground protection control system |
| CN112327099B (en) * | 2020-10-30 | 2021-10-01 | 南方电网科学研究院有限责任公司 | Power distribution network earth fault line selection tripping method and device and storage medium |
| CN112558589B (en) * | 2020-12-07 | 2022-11-22 | 天津津航计算技术研究所 | On-off control signal fault detection method and device |
| CN113203950B (en) * | 2021-04-30 | 2022-02-15 | 华中科技大学 | Method and system for diagnosing ground fault degree of generator stator of marine nuclear power platform |
| CN113933629B (en) * | 2021-10-12 | 2024-01-09 | 广东电网有限责任公司 | Discharge auxiliary detection device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2521811Y (en) * | 2002-01-24 | 2002-11-20 | 上海思源电气股份有限公司 | Shunt resistance type autoamtic tracking arc suppression compensating & select switch |
| CN2729981Y (en) * | 2004-08-20 | 2005-09-28 | 上海久创电气自动化设备有限公司 | Digital comprehensive protector |
| CN101055301A (en) * | 2007-06-14 | 2007-10-17 | 深圳市华力特电气有限公司 | Neutral point grounding resistor monitoring device |
| CN101183788A (en) * | 2007-12-11 | 2008-05-21 | 广州智光电气股份有限公司 | Power network controlled reactance and small resistor combination type earthing device |
| US8487635B1 (en) * | 2010-12-08 | 2013-07-16 | Dev Paul | System and method for determining system charging current |
| CN203522165U (en) * | 2013-11-04 | 2014-04-02 | 国家电网公司 | 20kV power distribution network neutral point grounding mode intelligent switching device |
-
2014
- 2014-08-04 CN CN201410377984.5A patent/CN104104077B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2521811Y (en) * | 2002-01-24 | 2002-11-20 | 上海思源电气股份有限公司 | Shunt resistance type autoamtic tracking arc suppression compensating & select switch |
| CN2729981Y (en) * | 2004-08-20 | 2005-09-28 | 上海久创电气自动化设备有限公司 | Digital comprehensive protector |
| CN101055301A (en) * | 2007-06-14 | 2007-10-17 | 深圳市华力特电气有限公司 | Neutral point grounding resistor monitoring device |
| CN101183788A (en) * | 2007-12-11 | 2008-05-21 | 广州智光电气股份有限公司 | Power network controlled reactance and small resistor combination type earthing device |
| US8487635B1 (en) * | 2010-12-08 | 2013-07-16 | Dev Paul | System and method for determining system charging current |
| CN203522165U (en) * | 2013-11-04 | 2014-04-02 | 国家电网公司 | 20kV power distribution network neutral point grounding mode intelligent switching device |
Non-Patent Citations (2)
| Title |
|---|
| 20kV电网改造中性点接地方式的研究;刘文婷;《机电信息》;20130228;第9-10页 * |
| 关于20kV配电网灵活接地方式若干问题的探讨;朱维力等;《浙江电力》;20121231;第6-8页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104104077A (en) | 2014-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104104077B (en) | 20kV neutral grounding in distribution power network method for handover control and device | |
| CN104283215B (en) | Detection and test method and device of intelligent distributed power distribution terminal | |
| CN105680412B (en) | A kind of intelligent self-recovery overcurrent protector and its method of work | |
| CN102231517B (en) | Method and system for determining and isolating power distribution network fault | |
| CN101478150B (en) | Intelligent diagnosis method and apparatus for power transmission and distribution line state | |
| CN105978148B (en) | The domestic intelligent safe distribution of electric power system and its long-distance monitoring method that can remotely monitor | |
| CN102299563B (en) | Digital-analog (DA) protection method for intelligent distribution network | |
| CN106655120A (en) | Intelligent ground protection method and system for neutral point of power distribution network | |
| CN103606910A (en) | Wide area information based fault self-healing method for dead zone of feeder outlet of distribution network | |
| CN107086664B (en) | A kind of substation exit pressing plate state monitoring apparatus and method | |
| CN110514930A (en) | A kind of the detection test method and device of intelligent distributed distribution terminal | |
| CN106655075A (en) | Electric equipment arc fault protection device and electric equipment control system | |
| CN103354352A (en) | Distributed intelligence based power distribution network safety protection method | |
| CN105988064A (en) | Functional meter capable of locating fault point and method used for locating fault point and applied to functional meter | |
| CN111884192B (en) | Method, device and system for controlling line faults of power distribution network | |
| CN103675520B (en) | Remote analysis method for determining leakage protector faults and AC contactor obstruction or faults | |
| CN102636705B (en) | Device for judging fault of remote leakage protector and blockage or fault of alternating current contactor, and analysis method thereof | |
| CN102005819A (en) | Fault isolation method of electric distribution network | |
| CN204258436U (en) | A kind of intelligentized reclosing breaker | |
| CN206235698U (en) | A kind of electric network single-phase earth fault differentiates, isolates and resultant fault anticipation device | |
| CN104749486B (en) | A kind of IT system single-phase fault localization method based on residual current operated protective device | |
| CN107294202A (en) | A kind of power distribution control circuit method and device | |
| CN105375436A (en) | Automatic cutoff protection apparatus and method for overtime operation of neutral-point resistor cabinet | |
| CN103441485A (en) | 20kV flexible grounding control device and 20kV flexible grounding control method | |
| CN103941155A (en) | High-voltage switch control loop break area identification circuit and identification method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |