CN106655463A - Safety anti-misoperation and sound-light alarm integrated logic system applied to voltage paralleling device - Google Patents
Safety anti-misoperation and sound-light alarm integrated logic system applied to voltage paralleling device Download PDFInfo
- Publication number
- CN106655463A CN106655463A CN201610799358.4A CN201610799358A CN106655463A CN 106655463 A CN106655463 A CN 106655463A CN 201610799358 A CN201610799358 A CN 201610799358A CN 106655463 A CN106655463 A CN 106655463A
- Authority
- CN
- China
- Prior art keywords
- voltage
- door
- module
- gate
- phase
- 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.)
- Granted
Links
Classifications
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
Abstract
The invention discloses a safety anti-misoperation and sound-light alarm integrated logic system applied to a voltage paralleling device. The safety anti-misoperation and sound-light integrated logic system comprises a three-phase voltage unbalance out-of-limit criterion module, a voltage vector comparison module, an edge-triggered logic setting module and a sound-light integrated alarm module. The integrated logic system provides a safety anti-misoperation function and a field sound-light integrated safety warning for a voltage paralleling/splitting field operation and maintenance, thereby effectively eliminating a voltage paralleling/splitting misoperation event; and meanwhile, corresponding logic is integrated into a substation integrated diagnosis system, so that a function that an operating background and a monitoring center monitor alarm information in real time can be realized.
Description
Technical field
The present invention relates to integrated automation of transformation stations safety control technology field, particularly a kind of to be used for voltage parallel device
Safe related function and acousto-optic warning integrated logic system.
Background technology
When the maintenance of one section of bus voltage transformer or failure, need voltage carry out side by side, by guarantee maintenance section bus protection and in terms of
Amount device normal work.Meanwhile, to prevent anti-power transmission from causing casualties and device damage, primary equipment is needed when voltage is arranged side by side
After completing side by side, secondary ability is arranged side by side.
Due to substation field there are problems that wiring error, secondary relay tip arranged side by side be adhered and,
And voltage parallel operation is only checked on by personnel's experience, easily there is the improper juxtaposed condition of voltage, cause that secondary voltage is counter to be delivered to
Maintenance side, gently then causes air switch tripping and device damage, heavy then cause Field Force's injures and deaths.
Existing voltage parallel device is primarily present following deficiency：
One is that secondary ability is arranged side by side after existing apparatus are only capable of realizing that primary equipment is arranged side by side；Either segment voltage can not be taken into account not
Balance etc. forbids factor arranged side by side, i.e., can not realize safety logic blocking function arranged side by side.
Two is that existing apparatus are only capable of displaying normal arranged side by side and two states of normal off-the-line；Can not realize that preoperative scene permits
Perhaps/and forbid acousto-optic warning arranged side by side, do not realize the acousto-optic warnings such as improper arranged side by side, the improper off-the-line after operating yet.
Three is that existing apparatus signal lamp is red green two states, not substation field abnormal condition sound and light alarm, only
Checked on by live O＆M/maintainer, be difficult to draw attention during operation is maked an inspection tour, and can not platform, Surveillance center after the activation
Uploading exception message carries out real-time monitoring, causes anti-power transmission event to take place frequently.
The content of the invention
It is an object of the invention to prevent Field Force's voltage simultaneously/off-the-line operational error, there is provided one kind can effectively guarantee existing
Field personnel and equipment safety, the safe related function and sound and light alarm integrated logic system for voltage parallel device of good stability.
The technical scheme for realizing the object of the invention is：A kind of safe related function and sound and light alarm for voltage parallel device is comprehensive
Logical system, including the out-of-limit criterion module of imbalance of three-phase voltage, voltage vector comparison module, edge triggering logic set module
With acousto-optic integrated alarm module；
The out-of-limit criterion module of imbalance of three-phase voltage is opened into for judging three as along triggering logic set module
Whether phase voltage uneven out-of-limit, when I section or II section of voltage three-phase imbalance it is out-of-limit, by OR circuit output 1, locking buckling
Function arranged side by side, while send out forbidding parallel signals；When I section or II section of voltage three-phase imbalance it is not out-of-limit, by OR circuit export
0, buckling function arranged side by side is opened, while send out allowing parallel signals；
Voltage vector comparison module and opening into for carrying out I, II section of buckling homophase electricity as acousto-optic integrated alarm module
The amount of pressing to compares, by with door, OR gate, not gate logic judgment, realize voltage simultaneously/off-the-line overall process voltage monitoring；
Receive that switch and knife switch secondary contact position, imbalance of three-phase voltage are out-of-limit to be opened into putting along triggering logic set module
Position signal carries out criterion, and during trigger pulse CP puts 1, output end Q is antilogical with input D, while shielding zero setting end C；
Trigger pulse CP sets to 0 the initial stage, and output Q puts 1 holding, and when zero setting end C puts 1, the zero setting of output end Q simultaneously keeps；
Acousto-optic integrated alarm module is patrolled according to voltage vector comparison module, the out-of-limit module of imbalance of three-phase voltage, along triggering
Opening into criterion is carried out for volume set module, sends normal arranged side by side, improper off-the-line arranged side by side, normal, improper off-the-line, forbids side by side
Or can audible and visual alarm signal side by side.
Compared with prior art, its remarkable advantage is the present invention：
(1) present invention is not only that the personnel such as execute-in-place, maintenance provide security logic anti-error function, prevent voltage mistake simultaneously/
Off-the-line Action Events, while providing live acousto-optic comprehensive safety warning；(2) logic is incorporated comprehensive diagnos system of transformer station by the present invention
System, realizes operation backstage and Surveillance center's real time monitoring function, i.e. voltage and column information is displayed in written form or alarm window
Operating backstage alarm window, and be uploaded to Surveillance center by network carries out monitor in real time, different to find simultaneously/off-the-line operation etc. in time
Often situation, points out field personnel, it is to avoid anti-power transmission causes casualties and device damage；(3) present invention passes through two sections of electricity
Pressure amplitude value and phase place compare analysis criterion, filled up transformer substation voltage simultaneously/blank of off-the-line monitoring system, to realizing transformer station's intelligence
Can diagnose and procedure operation is significant.
Description of the drawings
Fig. 1 is the voltage safe related function arranged side by side and sound and light alarm logic chart of the present invention.
Fig. 2 is power transformation primary equipment wiring schematic diagram.
Fig. 3 is voltage safe related function secondary connection diagram arranged side by side.
Fig. 4 is along triggering logic set module and its sequential chart.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described.
With reference to Fig. 1, a kind of safe related function and sound and light alarm integrated logic system for voltage parallel device of the present invention,
Including the out-of-limit criterion module of imbalance of three-phase voltage, voltage vector comparison module, along triggering logic set module and acousto-optic synthesis
Alarm module；
The out-of-limit criterion module of imbalance of three-phase voltage is opened into for judging three as along triggering logic set module
Whether phase voltage uneven out-of-limit, when I section or II section of voltage three-phase imbalance it is out-of-limit, by OR circuit output 1, locking buckling
Function arranged side by side, while send out forbidding parallel signals；When I section or II section of voltage three-phase imbalance it is not out-of-limit, by OR circuit export
0, buckling function arranged side by side is opened, while send out allowing parallel signals；
Voltage vector comparison module and opening into for carrying out I, II section of buckling homophase electricity as acousto-optic integrated alarm module
The amount of pressing to compares, by with door, OR gate, not gate logic judgment, realize voltage simultaneously/off-the-line overall process voltage monitoring；
Receive that switch and knife switch secondary contact position, imbalance of three-phase voltage are out-of-limit to be opened into putting along triggering logic set module
Position signal carries out criterion, and during trigger pulse CP puts 1, output end Q is antilogical with input D, while shielding zero setting end C；
Trigger pulse CP sets to 0 the initial stage, and output Q puts 1 holding, and when zero setting end C puts 1, the zero setting of output end Q simultaneously keeps；
Acousto-optic integrated alarm module is patrolled according to voltage vector comparison module, the out-of-limit module of imbalance of three-phase voltage, along triggering
Opening into criterion is carried out for volume set module, sends normal arranged side by side, improper off-the-line arranged side by side, normal, improper off-the-line, forbids side by side
Or can audible and visual alarm signal side by side.
Further, voltage vector comparison module includes first and door, the first OR gate, the second OR gate and second and door,
Wherein first carries out negating computing with three inputs of door and the second OR gate；Along triggering logic set module comprising the 3rd with
Door, the 3rd OR gate, edge triggering set and the 4th and door；The out-of-limit criterion module of imbalance of three-phase voltage includes the 4th OR gate；Sound
Light integrated alarm module includes the 5th with door, the 6th and door, the 7th and door, the 8th and door and not gate；
Voltage vector comparison module uses judgement formulaTwo sections of buses are carried out with alternate
Vectorial multilevel iudge,X=a, b, c, when two sections of phase vector fiducial values of busbar voltage three are all higher than being equal to threshold value, first exports with door
1, open into condition with door as the 5th；When arbitrary alternate vectorial fiducial value is less than threshold value, the first OR gate output 1, as the 6th
With opening into condition for door；When arbitrary alternate vectorial fiducial value is more than or equal to threshold value, the second OR gate output 1, as the 7th with door
Open into condition；Three phase vector fiducial values are respectively less than threshold value, second with door output 1, open into condition with door as the 8th；
The out-of-limit module of imbalance of three-phase voltage uses algorithmImbalance gets over limit value " relatively same section of mother
The difference of any two-phase mould of line, then carry out or computing with the difference of any two alternate mould of other one section of bus, when either segment bus
Voltage occur it is uneven more in limited time the output of the 4th OR gate puts 1, put for 1 stage in CP and set to 0 along trigger output Q, blocking voltage is arranged side by side
Operation；
Acousto-optic integrated alarm module receive voltage vector comparison module open into, the out-of-limit module of imbalance of three-phase voltage open into,
Logic judgment is carried out along triggering logic set signal；When the output of the 4th OR gate puts 1, send and forbid audible and visual alarm signal arranged side by side；
When the 4th OR gate sets to 0, not gate puts 1, and sending can audible and visual alarm signal side by side；When the 5th puts 1 with door, normal off-the-line is sent
Audible and visual alarm signal；When the 6th puts 1 with door, improper off-the-line audible and visual alarm signal is sent；When the 7th puts 1 with door, send
Improper audible and visual alarm signal arranged side by side；When the 8th puts 1 with door, normal audible and visual alarm signal side by side is sent.
In Fig. 2,1#PT disconnecting link 3G, 2#PT disconnecting link 4G, bus connection switch DL, the first mother mother side tool lock 1G, the second mother are female
Side tool lock 2G corresponds to respectively Fig. 3 corresponding secondary auxiliary switch 3G, 4G, DL, 1G, 2G；When 1#PT disconnecting links 3G closes position, its is secondary auxiliary
The switch 3G is helped also synchronously to close position, it is simultaneously that Fig. 1 logic charts are opened into criterion that it closes position signal, and other intervals are by that analogy.
In Fig. 3, when secondary auxiliary switch 3G closes position, first female buckling relay 1PTJ excitations, its auxiliary switch of Fig. 3 tops
1PTJ closes position, while when secondary air switch 1ZK of first mother's buckling closes position, 1 section little bus obtains voltage, for corresponding interval protection, meter
Amount is used；First female buckling is spaced by that analogy.
In Fig. 2, bus connection switch DL, the first mother mother side tool lock 1G, the second mother mother side tool lock 2G are right in closing position
Secondary auxiliary switch DL, 1G, 2G are answered in Fig. 3 in closing position；When buckling simultaneously/off-the-line handle BK beaten to juxtaposed position, in Fig. 3
Row swithes QK is connected；When, along triggering logic set output Q=1, anti-misoperation locking switch YJ is connected in Fig. 3, relay arranged side by side in Fig. 1
Device BLJ excitations, Fig. 3 tops its auxiliary switch BLJ closures, you can realize that voltage is secondary side by side.
Fig. 4 is that, along triggering logic set module and its sequential chart, sequential chart logic is as follows：
1st, rising edge t0Before, CP=0, initial state Q=0；
2nd, rising edge t0Moment, CP puts 1 by 0, rising edge triggering logic operation：Output Q and input D are antilogical, and are set to 0
End C is without logical relation；
3rd, rising edge is to (t between trailing edge0<t<t1)：Output Q and input D are antilogical, and C is held without logical relation with setting to 0；
Wherein：t1-t0>5 minutes；
4th, trailing edge t1Moment, CP is set to 0 by 1, and output Q puts 1 and keeps；
5th, after trailing edge t1, trailing edge triggering logic operation：When C is 1, output Q sets to 0 and keeps, and exports Q and input
D is without logical relation.
The present invention can realize following function：
(1) anti mis-closedown function of voltage security parallel device
It is upper in triggering logic set module when DL conjunctions position, 1G close position, 2G conjunction these primary equipments of position completes arranged side by side
Rise and put 1,0 by 0 along triggering logic operation, i.e. CP<T<t：Output Q and input D are antilogical, with zero setting C without logical relation.
Terminate when the time delay t times, i.e. T>T, CP are set to 0 by 1, the trailing edge triggering logic fortune in triggering logic set module
OK, export Q to put 1 and keep, when C is 1, output Q sets to 0 and keeps, output Q and input D are without logical relation.
Related to YJ nodes along triggering logic set output Q, when Q puts 1, YJ junction closures, anti-mis-logical is opened, it is allowed to
Voltage is secondary side by side；When Q sets to 0, YJ contacts disconnect, anti-error logic blocking, forbid voltage secondary side by side.
(2) voltage security parallel device scene acousto-optic alarm function
1st, when primary equipment is in closing position
1.1 its secondary auxiliary contact all in closing position and I, II section of voltage three-phase imbalance more not in limited time：
Auditory tone cues：Can be arranged side by side；Light prompt：Warning light green glow flashes；
1.2 after voltage handle arranged side by side is beaten to juxtaposed position or switch combined floodgate time delay automatic Synchronization, voltage vector compares mould
Block takes two sections of buckling three-phase voltages and carries out amplitude and phase bit comparison
1.2.1 when three-phase difference is respectively less than threshold value
Auditory tone cues：It is normal arranged side by side；Light prompt：Lamp green glow Chang Liang arranged side by side；
1.2.2 when there is a phase difference to be more than threshold value
Auditory tone cues：It is improper arranged side by side, take care；Light prompt：Lamp ruddiness fast blink side by side；
1.3rd, automatic parallel off after voltage handle arranged side by side is beaten to solution column position or switch to be pulled open, voltage vector comparison module takes
Two sections of buckling three-phase voltages carry out amplitude and phase bit comparison
1.3.1 when three-phase difference is all higher than threshold value
Auditory tone cues：Normal off-the-line；Light prompt：Off-the-line lamp green glow Chang Liang；
1.3.2 when three-phase difference has one to be mutually less than threshold value
Auditory tone cues：Improper off-the-line, takes care；Light prompt：Off-the-line lamp ruddiness fast blink.
2nd, when primary equipment is not in juxtaposed position, its secondary auxiliary contact has a point of position or has imbalance of three-phase voltage to get over
In limited time
Auditory tone cues：Forbid side by side；Light prompt：Warning light ruddiness fast blink.
(3) terminal voltage of standing safety simultaneously/off-the-line is anti-error and monitoring function
By digitized voltage, DL, 1G, 2G, BK letter in the logical AND station in the logic chart of voltage security parallel device shown in Fig. 1
Number be fused into transformer substation voltage safety simultaneously/off-the-line is anti-error and monitoring system, can after the activation platform realize voltage security simultaneously/off-the-line
Operation, and it is sustainable monitoring its operation conditions, inform in real time execute-in-place, maintenance and other staff, effectively guarantee the person,
The safe operation of equipment, improves the integrated intelligence diagnosis system of substation safety operation.
Claims (2)
1. a kind of safe related function and sound and light alarm integrated logic system for voltage parallel device, it is characterised in that including three
The uneven out-of-limit criterion module of phase voltage, voltage vector comparison module, edge triggering logic set module and acousto-optic integrated alarm mould
Block；
The out-of-limit criterion module of imbalance of three-phase voltage is opened into for judging three-phase electricity as along triggering logic set module
Whether pressure uneven out-of-limit, when I section or II section of voltage three-phase imbalance it is out-of-limit, by OR circuit output 1, locking buckling is arranged side by side
Function, while send out forbidding parallel signals；When I section or II section of voltage three-phase imbalance it is not out-of-limit, by OR circuit output 0, open
Change function arranged side by side is bled off pressure, while send out allowing parallel signals；
Voltage vector comparison module and as acousto-optic integrated alarm module open into, for carry out I, II section of buckling in-phase voltage to
Amount compares, by with door, OR gate, not gate logic judgment, realize voltage simultaneously/off-the-line overall process voltage monitoring；
Receive switch along triggering logic set module and knife switch secondary contact position, out-of-limit the opening of imbalance of three-phase voltage are believed into set
Number criterion is carried out, during trigger pulse CP puts 1, output end Q is antilogical with input D, while shielding zero setting end C；In triggering
Pulse CP sets to 0 the initial stage, and output Q puts 1 holding, and when zero setting end C puts 1, the zero setting of output end Q simultaneously keeps；
Acousto-optic integrated alarm module is put according to voltage vector comparison module, the out-of-limit module of imbalance of three-phase voltage, along triggering logic
Position module is opened into criterion is carried out, and is sent normal arranged side by side, improper off-the-line arranged side by side, normal, improper off-the-line, is forbidden side by side or can
With audible and visual alarm signal arranged side by side.
2. the safe related function and sound and light alarm integrated logic system for voltage parallel device according to claim 1, its
It is characterised by, voltage vector comparison module includes first and door, the first OR gate, the second OR gate and second and door, wherein first
Carry out negating computing with three inputs of door and the second OR gate；Along triggering logic set module comprising the 3rd with door, the 3rd
OR gate, edge triggering set and the 4th and door；The out-of-limit criterion module of imbalance of three-phase voltage includes the 4th OR gate；Acousto-optic is comprehensively reported
Police's module includes the 5th with door, the 6th and door, the 7th and door, the 8th and door and not gate；
Voltage vector comparison module with judgement formula "" two sections of buses are carried out with alternate vector
Multilevel iudge, X=a, b, c, when two sections of phase vector fiducial values of busbar voltage three are all higher than being equal to threshold value, first exports 1 with door, makees
Open into condition with door for the 5th；When arbitrary alternate vectorial fiducial value is less than threshold value, the first OR gate output 1, as the 6th and door
Open into condition；When arbitrary alternate vectorial fiducial value be more than or equal to threshold value, the second OR gate output 1, as the 7th with door open into
Condition；Three phase vector fiducial values are respectively less than threshold value, second with door output 1, open into condition with door as the 8th；
The out-of-limit module of imbalance of three-phase voltage with judgement formula "" relatively same section of bus
The difference of any two-phase mould, then carry out or computing with the difference of any two alternate mould of other one section of bus, when either segment bus electricity
Extrude it is existing uneven more in limited time the output of the 4th OR gate puts 1, put for 1 stage in CP and set to 0 along trigger output Q, blocking voltage is grasped side by side
Make；
Acousto-optic integrated alarm module receive voltage vector comparison module open into, the out-of-limit module of imbalance of three-phase voltage open into, along touching
Sending out logic set signal carries out logic judgment；When the output of the 4th OR gate puts 1, send and forbid audible and visual alarm signal arranged side by side；When
When four OR gates set to 0, not gate puts 1, and sending can audible and visual alarm signal side by side；When the 5th puts 1 with door, normal off-the-line acousto-optic is sent
Alarm signal；When the 6th puts 1 with door, improper off-the-line audible and visual alarm signal is sent；When the 7th puts 1 with door, anon-normal is sent
Chang Binglie audible and visual alarm signals；When the 8th puts 1 with door, normal audible and visual alarm signal side by side is sent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610799358.4A CN106655463B (en) | 2016-08-31 | 2016-08-31 | Safe related function and sound-light alarm integrated logic system for voltage parallel device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610799358.4A CN106655463B (en) | 2016-08-31 | 2016-08-31 | Safe related function and sound-light alarm integrated logic system for voltage parallel device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106655463A true CN106655463A (en) | 2017-05-10 |
| CN106655463B CN106655463B (en) | 2019-06-21 |
Family
ID=58852935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610799358.4A Active CN106655463B (en) | 2016-08-31 | 2016-08-31 | Safe related function and sound-light alarm integrated logic system for voltage parallel device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106655463B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832624A (en) * | 2018-06-30 | 2018-11-16 | 国网江苏省电力有限公司连云港供电分公司 | Voltage security parallel device |
| CN109542013A (en) * | 2018-12-06 | 2019-03-29 | 国网江苏省电力有限公司连云港供电分公司 | The parallel electrical anti-misoperation locking device of microcomputer |
| CN113933568A (en) * | 2021-08-24 | 2022-01-14 | 广西电网有限责任公司防城港供电局 | OCS (online charging System) -based transformer substation 10kV bus three-phase voltage unbalance monitoring method |
| CN116500532A (en) * | 2023-06-25 | 2023-07-28 | 云南电网有限责任公司 | Metering abnormality evaluation method and system for synchronous cross sampling high-voltage potential transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2735628Y (en) * | 2004-02-03 | 2005-10-19 | 熊家寅 | Serial control device for synchronization and fast switching between microcomputers |
| CN1920721A (en) * | 2006-09-15 | 2007-02-28 | 四川东风电机厂有限公司 | Method for debugging micro computer monitoring protection system of water power station |
| CN102195291A (en) * | 2011-05-18 | 2011-09-21 | 江苏省电力公司苏州供电公司 | Automatically identifying control method for main transformer overload joining-cutting load based on running mode |
| CN102324741A (en) * | 2011-08-17 | 2012-01-18 | 国家电网公司 | Micro-power grid off-grid energy balance and control device and method |
| US20130265680A1 (en) * | 2012-04-04 | 2013-10-10 | Siemens Industry, Inc. | Systems, methods and apparatus for protecting power distribution feeder systems |
-
2016
- 2016-08-31 CN CN201610799358.4A patent/CN106655463B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2735628Y (en) * | 2004-02-03 | 2005-10-19 | 熊家寅 | Serial control device for synchronization and fast switching between microcomputers |
| CN1920721A (en) * | 2006-09-15 | 2007-02-28 | 四川东风电机厂有限公司 | Method for debugging micro computer monitoring protection system of water power station |
| CN102195291A (en) * | 2011-05-18 | 2011-09-21 | 江苏省电力公司苏州供电公司 | Automatically identifying control method for main transformer overload joining-cutting load based on running mode |
| CN102324741A (en) * | 2011-08-17 | 2012-01-18 | 国家电网公司 | Micro-power grid off-grid energy balance and control device and method |
| US20130265680A1 (en) * | 2012-04-04 | 2013-10-10 | Siemens Industry, Inc. | Systems, methods and apparatus for protecting power distribution feeder systems |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832624A (en) * | 2018-06-30 | 2018-11-16 | 国网江苏省电力有限公司连云港供电分公司 | Voltage security parallel device |
| CN109542013A (en) * | 2018-12-06 | 2019-03-29 | 国网江苏省电力有限公司连云港供电分公司 | The parallel electrical anti-misoperation locking device of microcomputer |
| CN109542013B (en) * | 2018-12-06 | 2021-05-14 | 国网江苏省电力有限公司连云港供电分公司 | Parallel micro-electromechanical electric error-proof locking device |
| CN113933568A (en) * | 2021-08-24 | 2022-01-14 | 广西电网有限责任公司防城港供电局 | OCS (online charging System) -based transformer substation 10kV bus three-phase voltage unbalance monitoring method |
| CN116500532A (en) * | 2023-06-25 | 2023-07-28 | 云南电网有限责任公司 | Metering abnormality evaluation method and system for synchronous cross sampling high-voltage potential transformer |
| CN116500532B (en) * | 2023-06-25 | 2023-11-14 | 云南电网有限责任公司 | Metering abnormality evaluation method and system for synchronous cross sampling high-voltage potential transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106655463B (en) | 2019-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104539043B (en) | A kind of automatic switching device of standby power supply system haul oneself willingly into method | |
| CN105305620B (en) | A kind of breaker closing control loop template monitoring system | |
| US9362738B2 (en) | Intelligent control system for high-voltage switch and control method thereof | |
| CN106655463A (en) | Safety anti-misoperation and sound-light alarm integrated logic system applied to voltage paralleling device | |
| CN106680634B (en) | A kind of intelligent early-warning method of intelligent substation relay protection safety measure | |
| CN109884521A (en) | A kind of circuit-breaker switching on-off control loop template monitoring, alarming circuit | |
| CN106253336B (en) | Distributed generation resource isolated island effect prevention relay protecting method | |
| CN103698647B (en) | A kind of automatic testing method of Single-phase Earth Fault of Power System | |
| CN103580006A (en) | CT broken line discrimination method during bus protection | |
| CN201802208U (en) | Monitoring device for door safety interlock loop | |
| CN106787222A (en) | A kind of neutral point of main transformer grounding switch remote control circuit | |
| CN105044430B (en) | The tributary electric current detecting method and system of double-bus distribution equipment outlet arranged side by side | |
| CN108832624A (en) | Voltage security parallel device | |
| CN203535152U (en) | Recessive defect detecting device for external starting contacts of failure protection equipment | |
| CN209119814U (en) | Voltage security parallel device | |
| CN205657497U (en) | Online management system of earthing for work line | |
| CN104882795B (en) | Power distribution network ring main unit control circuit having broken line monitoring function | |
| CN204271745U (en) | Automatic switching device of standby power supply system | |
| CN207442445U (en) | Adaptive throw of busbar interconnection moves back circuit and back brake control system | |
| CN209948519U (en) | Ring main unit prevents taking earthing combined floodgate protection device | |
| CN204238697U (en) | A kind of intelligence is by arrangements for automotive doors automatic locking device transition | |
| CN211627693U (en) | Portable automatic phase sequence detection device | |
| CN108471106B (en) | One kind is based on single mother partition mode of connection bus interval secondary anti-misoperation method and device | |
| CN112394299A (en) | Far-end electric leakage test device for coal mine underground power line | |
| CN207082902U (en) | A kind of neutral point of main transformer grounding switch remote control circuit |
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 |