CN106405410A - Relay protection exit detection method, relay protection exit detection device and relay protection exit detection system - Google Patents
Relay protection exit detection method, relay protection exit detection device and relay protection exit detection system Download PDFInfo
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- CN106405410A CN106405410A CN201611039320.3A CN201611039320A CN106405410A CN 106405410 A CN106405410 A CN 106405410A CN 201611039320 A CN201611039320 A CN 201611039320A CN 106405410 A CN106405410 A CN 106405410A
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- 238000001514 detection method Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 42
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- 238000002955 isolation Methods 0.000 claims description 9
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- 239000004973 liquid crystal related substance Substances 0.000 description 4
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- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
Abstract
The invention relates to a relay protection exit detection method, a relay protection exit detection device and a relay protection exit detection system. The method comprises the following steps: if that the potential signal of a channel corresponding to any wiring terminal changes is detected, the serial number and/or name of the wiring terminal corresponding to the changed potential signal and the signal change time limit are recorded, wherein the wiring terminals are used to connect exit pressure plates of a relay protection device; if that the potential signals of all the channels are zeroed is detected, a relay protection exit detection result is output, wherein the detection result includes the serial number and/or name of the wiring terminal corresponding to the changed potential signal and the signal change time limit. The staff can see the relay protection exit detection result through a display. As multiple wiring terminals are arranged, all time limit protection exits of one protection can be detected at one time, and the detection efficiency is high.
Description
Technical field
The present invention relates to Relay Protection Technology in Power System field, more particularly to a kind of relay protection outlet detection side
Method, device and system.
Background technology
Protective relaying device action correctness in power system is related to stablizing of electrical network.For detection relay protection dress
Whether correct put action, it usually needs the action to protective relaying device measures, by the action message collecting and protection
Fixed value list is checked.
Traditional is tested one by one by exporting contact using general-purpose change to protective relaying device.During this method measurement
Between long, workload is big, thus leading to measurement efficiency low.
Content of the invention
Based on this it is necessary to provide a kind of high relay protection outlet detection method of detection efficiency, device and system.
A kind of relay protection outlet detection method, including：
When the electric potential signal detecting the corresponding passage of any one binding post changes, record the institute changing
State sequence number and/or title and the signal intensity time limit of the corresponding binding post of electric potential signal, described binding post is used for connecting
The output clamping of protective relaying device；
If the electric potential signal zero in all passages is detected, export relay protection outlet testing result, described detection
Result includes the sequence number of the corresponding described binding post of electric potential signal changing and/or title and signal intensity time limit.
In one embodiment, before the step of described output relay protection outlet testing result, also include：Acquisition sets
Fixed display mode；
The step of described output relay protection outlet testing result includes：According to the display mode setting, output relay is protected
Shield outlet testing result simultaneously shows.
A kind of relay protection outlet detection means, including：First detection module, logging modle, the second detection module and defeated
Go out module；
Described first detection module, whether the electric potential signal for detecting the corresponding passage of any one binding post occurs
Change, described binding post is used for connecting the output clamping of protective relaying device；
Described logging modle, for when the testing result of described detection module is for being, recording the described electricity changing
The sequence number of the position corresponding binding post of signal and/or title and signal intensity time limit；
Described second detection module, for detecting whether the electric potential signal in all passages is zeroed；
Described output module, for when the testing result of described second detection module is for being, exporting relay protection outlet
Testing result, described testing result includes the sequence number of the corresponding described binding post of electric potential signal changing and/or title
And the signal intensity time limit.
In one embodiment, also include display mode acquisition module, for obtaining the display mode setting；
Described output module, for according to the display mode setting, output relay protection outlet testing result simultaneously shows.
A kind of relay protection outlet detecting system, including：Signal pickup assembly, microprocessor and display；
Described signal pickup assembly includes each binding post for being connected, each institute with the output clamping of protective relaying device
The input stating signal pickup assembly with described microprocessor is connected, and the output end of described microprocessor connects described display；
Described microprocessor includes above-mentioned relay protection outlet detection means.
In one embodiment, described signal pickup assembly also includes operation amplifier circuit, each described operational amplifier
The input of circuit is connected with each described binding post, and output end is connected with described microprocessor.
In one embodiment, described signal pickup assembly also includes the defeated of input and each described operation amplifier circuit
Go out end to connect, the optical coupling isolation circuit that output end is connected with described microprocessor.
In one embodiment, also include housing；Described each binding post and described display are arranged on outside described housing；
Described microprocessor is arranged in described housing.
In one embodiment, the display controlling switch that is arranged on outside described housing, each described display control are also included
System switch is connected with described microprocessor.
In one embodiment, described display controlling switch includes display switching switch, backlight control and page turning control
Any one or more of switch.
Above-mentioned relay protection outlet detection method, by being connected to output clamping in corresponding wiring terminal, using connecing
The electric potential signal of the pressing plate of line terminals collection action, is obtained by the potential change of the corresponding output clamping according to collection for the microprocessor
To the protection act information of each output clamping, protection act information is shown by display, and staff passes through display
Relay protection outlet testing result can be checked.And due to being provided with multiple binding posts, can disposably detect a guarantor
All time limit protection exit results of shield, detection efficiency is high.
Brief description
Fig. 1 is the high-level schematic functional block diagram of the relay protection outlet detecting system of an embodiment；
Fig. 2 is the high-level schematic functional block diagram of the relay protection outlet detecting system of another embodiment；
Fig. 3 is the circuit theory diagrams of the signal supervisory instrument of an embodiment；
Fig. 4 is the part-structure schematic diagram of the relay protection outlet detecting system of an embodiment；
Fig. 5 is the flow chart of the relay protection outlet detection method of an embodiment；
Fig. 6 is the electric potential signal change schematic diagram in the relay protection outlet detection method of an embodiment；
Fig. 7 is the signal with text importing testing result of the relay protection outlet detection method output of an embodiment
Figure；Fig. 8 is the schematic diagram of testing result that shows of page turning of an embodiment；
Fig. 9 is the signal with numerical monitor testing result of the relay protection outlet detection method output of an embodiment
Figure；
Figure 10 is the high-level schematic functional block diagram of the relay protection outlet detection means of an embodiment.
Specific embodiment
A kind of relay protection outlet detecting system, as shown in figure 1, include signal pickup assembly 102, microprocessor 104 and
Display 106.
Signal pickup assembly 102 includes each binding post 1021 for being connected with the output clamping of protective relaying device.
Each signal pickup assembly 102 is connected with the input of microprocessor 104, and the output end of microprocessor 104 is with display 106 even
Connect.In a particular embodiment, binding post 1021 has multiple, is respectively provided with the corresponding wiring of every kind of protection exit pressing plate
Terminal, for example certain station main transformer protection high jump pressure side guide, jump high pressure side pressing plate, jump high-pressure side conk-out pressing plate,
High jump pressure surveys mother pressing plate etc..
Protective relaying device connects corresponding protection act contact in different time span by definite value requirement, and action connection point one connects
On positive supply, other end is connected on pressing plate.By being connected to pressing plate on binding post, signal pickup assembly can gather action
Pressing plate electric potential signal change.
In the present embodiment, by pressing plate is connected on each binding post of signal pickup assembly, collection relay protection dress
The on-state of the protection act contact put, is obtained by the potential change of the corresponding output clamping according to collection for the microprocessor 104
Protection act information to each output clamping.Protection act information is shown by display 106.
The sequence number of the corresponding each binding post 1021 of electric potential signal and/or title that microprocessor 104 record changes
And the signal intensity time limit.In a specific embodiment, the title of each binding post can be the title of output clamping
Or it is referred to as.Corresponding output clamping, the electricity of the corresponding output clamping of signal pickup assembly collection are connected by each binding post 102
Position change, and each relay protection outlet testing result is obtained according to potential change, testing result includes the current potential letter changing
The sequence number of number corresponding binding post and/or title and signal intensity time limit.Staff by testing result and protects definite value
Singly checked, can be detected whether protective relaying device action is correct.
Above-mentioned relay protection outlet detecting system, by being connected to output clamping in corresponding wiring terminal, using connecing
The electric potential signal of the pressing plate of line terminals collection action, is obtained by the potential change of the corresponding output clamping according to collection for the microprocessor
To the protection act information of each output clamping, protection act information is shown by display, and staff passes through display
Relay protection outlet testing result can be checked.And due to being provided with multiple binding posts, can disposably detect a guarantor
All time limit protection exit results of shield, detection efficiency is high.
In another embodiment, as shown in Fig. 2 signal pickup assembly 102 also includes operation amplifier circuit 1022, respectively
The input of operation amplifier circuit 1022 is connected with each binding post 1021, and output end is connected with microprocessor 104.
Signal pickup assembly 102 is also included input and is connected with the output end of each operation amplifier circuit 1022, output end
The optical coupling isolation circuit 1023 being connected with microprocessor 104.
The circuit theory diagrams of signal supervisory instrument as indicated at 3, including binding post 1021, operation amplifier circuit 1022 and
Optical coupling isolation circuit 1023.Wherein, binding post 1021 is as the signal input part of signal supervisory instrument, operation amplifier circuit
1022 are made up of operational amplifier chip TL084 and resistance, and optical coupling isolation circuit 1023 is by light-coupled isolation chip TLP521 and electricity
Resistance is constituted.Signal supervisory instrument 102 is used for the pulse signal that detection is gathered by binding post.Specifically, transforming plant DC is female
Line-to-earth voltage is by balance bridge electric resistance partial pressure, the usually half of straight-flow system nominal voltage.When secondary cable pair in station
It may appear that the situation of variation during ground defective insulation, but skew is less than the 15% of nominal voltage.Therefore protection exit pulse is electric
It is pressed in 110 × 35%～220 × 65%, that is, between 38.5V～143V.Signal supervisory instrument adopt Fig. 3 by operational amplifier and
The circuit of light-coupled isolation device composition, can detect that the voltage signal of 20V～200V, cover outlet pulse voltage gamut.When
When input voltage is less than 15V, this circuit does not reliably export.Because main transformer protection device is all installed on, relay protection is indoor, and few occur
Higher than the interference voltages of 15V, therefore this circuit can reliably be considered except interference.This circuit input impedance is up to more than 15M Ω, 30
When road input all turns on, the input impedance of whole device is about 500k Ω, meets station interior insulation and requires.
It is direct current that the forceful electric power of the switching manipulation power supply generally used by trip protection or busbar protective device is opened into power supply, over the ground
Voltage is normally DC+55V or DC+110V, and after protective relaying device protection act, this voltage enters relay protection outlet
The operation amplifier circuit 1022 of detecting system, strong electric potential signal is converted to light current current potential letter by this operation amplifier circuit 1022
Number, then processed through optical coupling isolation circuit 1023 feeding microprocessor 104.Specifically, microprocessor 104 is STM32F103
Control chip.When main transformer protection resets, ARM control chip is to LCDs input test object information.
In another embodiment, as shown in figure 4, also including housing 10.Each binding post 102 and display 106 are arranged
Outside housing 10, microprocessor 104 is arranged in housing.It should be appreciated that operational amplification circuit 1022 and light-coupled isolation electricity
Road 1023 is also disposed in housing.
In another embodiment, as shown in figure 3, also including the display controlling switch being arranged on outside housing 10, each aobvious
Show that device controlling switch is connected with microprocessor.Display controlling switch includes display switching switch, backlight control switch and page turning
Any one or more of controlling switch.
Display switching switch is for setting the display mode of the title of passage.Display mode includes text importing and numeral shows
Show, that is, the testing result exporting can be the sequence number of the corresponding each binding post of each output clamping of action or each outlet of action
The title of the corresponding each binding post of pressing plate.Backlight control switch can be used for adjusting the display brightness of display.Page turning controls opens
Pass can be used for, when showing testing result, carrying out page turning to page display content.
The display result of device output should facilitate field service personnel to compare with fixed value list as far as possible.Generally, standby in fixed value list
Tripping matrix is had to describe, for example in note hurdle：" I section of first time limit of zero sequence jumps 220kV bus connection switch, and I section of second time limit of zero sequence jumps #1
Uprise switch；II section of zero sequence is jumped #1 and is become three side switches." this word description compare 16 systems statement tripping operation control word be more convenient for
Field service personnel understands, therefore preferentially by the way of Display of Chinese characters on liquid crystal.Can detect on port in advance using in device
Define connect pressing plate (adhesive label is informed), field service personnel only needs for the output clamping on main transformer protection screen to be connected to corresponding inspection
Survey the mode of connection of terminal.Which is easy to device and is learnt the corresponding pressing plate in each detection port, is easy to be shown with word on liquid crystal
Show outlet information.Investigate the main transformer protection device of different electric pressures, determine device detection setting 30 tunnel detection input：Uprise,
In change, each 10 tunnels of step-down, its definition is shown in Table 1, substantially covers most protection exit pressing plates；And leave standby.
Table 1 detection terminal word description
Also there is table 2, table 3, the expression form of table 4 in main transformer protection fixed value list (or definite value of device printing).Therefrom permissible
Find out, different manufacturers are different to the definition of outlet order.Use this fixed value list to check for convenience of field service personnel, can set
Counter device provides another kind of wiring and result display mode.Display mode selecting switch is provided on device, " shows when switch is in
Show word " when, wiring in the manner aforesaid, and Display of Chinese characters result on liquid crystal；When switch is in " display numeral ", by definite value
Single definition, output clamping is connected on corresponding digital port, and shows numeric results on liquid crystal.Both sides are provided
Formula, can meet the use habit of different maintainers.
Table 2 PRS-778S-2BNW main transformer protection part fixed value list
Table 3 PCS-978NE main transformer protection part fixed value list
Table 4 WBH-801A main transformer protection part fixed value list
Specifically, a kind of relay protection outlet detection method operates in the microprocessor 104 shown in Fig. 1, as Fig. 5 institute
Show, the method comprises the following steps：
S502：Detect whether the electric potential signal of the corresponding passage of any one binding post changes.If so, then execute
Step S504.
Specifically, relay protection outlet detection means provides multiple binding posts, and binding post is used for connecting relay protection
The output clamping of device.During detection, the output clamping of protective relaying device is connected on corresponding binding post.Protected with main transformer
As a example shield outlet detection, all of for live main transformer protection output clamping is connected to the corresponding binding post of detection means offer
In.
Staff uses for convenience, in a particular embodiment, mark binding post by each binding post
Sequence number and/or title, wherein, the title of binding post is corresponding with each output clamping, may be set to output clamping title or and
Referred to as.In a specific embodiment, connect corresponding to entitled for live pressing plate " the high 2201 switch outlet pressing plates of saltus step "
The title of line terminals is set to " saltus step is high ".The passage that passage in the present embodiment is formed by binding post.
Whether detection signal changes is realized by having detected whether rising edge or trailing edge.Go out in a relay protection
In mouth detecting system, the criterion whether signal changes is fixing, for example, has detected whether rising edge.Generally, exist
After action protection contact action, as shown in fig. 6, corresponding passage is changed into high level from zero level, have in the signal detecting
One rising edge.Therefore, changed by the signal that rising edge can interpolate that respective channel, further judge corresponding pressure
Plate action.
S504：Record the sequence number of the corresponding binding post of electric potential signal changing and/or title and signal intensity
Time limit.
When signal intensity is detected, record the sequence number of the corresponding binding post of electric potential signal changing and/or name
Claim and the signal intensity time limit.In a particular embodiment, when time rising edge is detected each time is for a signal intensity
The time started of limit, the time started of next signal transformation period was the end time in a upper signal intensity time limit.
S506：Detect whether the electric potential signal in all passages is zeroed.If it is not, then execution step S502, if so, then execute
Step S508.
S508：Output relay protection outlet testing result, testing result includes that the electric potential signal that changes is corresponding to be connect
The sequence number of line terminals and/or title and signal intensity time limit.
In one embodiment, with the relay protection outlet testing result of text importing output as shown in fig. 7, testing result
Sequence number including the corresponding binding post of the electric potential signal changing and/or title and signal intensity time limit, wherein wiring
The title of terminal is corresponding with the title of output clamping.
Above-mentioned relay protection outlet detection method, by being connected to output clamping in corresponding wiring terminal, using connecing
The electric potential signal of the pressing plate of line terminals collection action, the potential change of the corresponding output clamping according to collection obtains each output clamping
Protection act information.Due to being provided with multiple binding posts, can disposably detect that all time limits of a protection are protected out
Mouth result, detection efficiency is high.
In another embodiment, before step S508, also include：Obtain the display mode setting.
Step S508 includes：According to the display mode setting, output relay protection outlet testing result simultaneously shows.
In the present embodiment, the display mode of setting is used for setting the display mode of the title of passage.Display mode includes literary composition
Word shows and numerical monitor, that is, the testing result exporting can be the sequence number of the corresponding each binding post of each output clamping of action
Or the title of the corresponding each binding post of each output clamping of action.As shown in fig. 7, detection knot is shown in text importing mode
Really.As shown in figure 8, when one page can not show testing result, carry out translating by page turning controlling switch and show lower one page
Content.As shown in figure 9, testing result is shown in numerical monitor mode.
A kind of relay protection outlet detection means, as shown in Figure 10, including：
First detection module 802, logging modle 804, the second detection module 806 and output module 808；
First detection module 802, whether the electric potential signal for detecting the corresponding passage of any one binding post occurs
Change, binding post is used for connecting the output clamping of protective relaying device.
Logging modle 804, for when the testing result of detection module is for being, recording the corresponding binding post of electric potential signal
Sequence number and/or title and signal intensity time limit；
Second detection module 806, for detecting whether the electric potential signal in all passages is zeroed.
Output module 808, for when the testing result of the second detection module is for being, output relay protection outlet detection is tied
Really, testing result includes sequence number and/or title and the signal intensity time limit of the corresponding wiring terminal that electric potential signal changes.
First detection module 802, for when the testing result of the second detection module is no, each binding post of detection corresponds to
The electric potential signal of passage whether change.
In another embodiment, relay protection outlet detection means also includes display mode acquisition module, for obtaining
The display mode setting；
Output module 808, for according to the display mode setting, output relay protection outlet testing result simultaneously shows.
Above-mentioned relay protection outlet detection means, by being connected to output clamping in corresponding wiring terminal, using connecing
The electric potential signal of the pressing plate of line terminals collection action, the potential change of the corresponding output clamping according to collection obtains each output clamping
Protection act information.Due to being provided with multiple binding posts, can disposably detect that all time limits of a protection are protected out
Mouth result, detection efficiency is high.
Each technical characteristic of embodiment described above can arbitrarily be combined, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic applied in example is all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope of this specification record.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
Say, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of relay protection outlet detection method is it is characterised in that include：
When the electric potential signal detecting the corresponding passage of any one binding post changes, record the described electricity changing
The sequence number of the position corresponding binding post of signal and/or title and signal intensity time limit, described binding post is used for connecting relay
The output clamping of protection device；
If the electric potential signal zero in all passages is detected, export relay protection outlet testing result, described testing result
Sequence number including the corresponding described binding post of the electric potential signal changing and/or title and signal intensity time limit.
2. method according to claim 1 it is characterised in that：
Before the step of described output relay protection outlet testing result, also include：Obtain the display mode setting；
The step of described output relay protection outlet testing result includes：According to the display mode setting, output relay protection goes out
Mouth testing result simultaneously shows.
3. a kind of relay protection outlet detection means is it is characterised in that include：First detection module, logging modle, the second detection
Module and output module；
Described first detection module, whether the electric potential signal for detecting the corresponding passage of any one binding post becomes
Change, described binding post is used for connecting the output clamping of protective relaying device；
Described logging modle, for when the testing result of described detection module is for being, the described current potential that record changes is believed
The sequence number of number corresponding binding post and/or title and signal intensity time limit；
Described second detection module, for detecting whether the electric potential signal in all passages is zeroed；
Described output module, for when the testing result of described second detection module is for being, output relay protection outlet detects
As a result, described testing result include the sequence number of the corresponding described binding post of electric potential signal changing and/or title and
The signal intensity time limit.
4. device according to claim 3 it is characterised in that：
Also include display mode acquisition module, for obtaining the display mode setting；
Described output module, for according to the display mode setting, output relay protection outlet testing result simultaneously shows.
5. a kind of relay protection outlet detecting system is it is characterised in that include：Signal pickup assembly, microprocessor and display；
Described signal pickup assembly includes each binding post for being connected, each described letter with the output clamping of protective relaying device
Number harvester is connected with the input of described microprocessor, and the output end of described microprocessor connects described display；Described
Microprocessor includes the relay protection outlet detection means described in claim 3 or 4.
6. system according to claim 5 is it is characterised in that described signal pickup assembly also includes operation amplifier circuit
The input of each described operation amplifier circuit is connected with each described binding post, and output end is connected with described microprocessor.
7. system according to claim 6 it is characterised in that described signal pickup assembly also to include input described with each
The output end of operation amplifier circuit connects, the optical coupling isolation circuit that output end is connected with described microprocessor.
8. system according to claim 5 is it is characterised in that also include housing；Described each binding post and described display
Device is arranged on outside described housing；Described microprocessor is arranged in described housing.
9. system according to claim 8 is it is characterised in that the display control also including being arranged on outside described housing is opened
Close, each described display controlling switch is connected with described microprocessor.
10. system according to claim 9 it is characterised in that described display controlling switch include display switching switch,
Any one or more of backlight control switch and page turning controlling switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611039320.3A CN106405410B (en) | 2016-11-21 | Relay protection outlet detection method, device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611039320.3A CN106405410B (en) | 2016-11-21 | Relay protection outlet detection method, device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106405410A true CN106405410A (en) | 2017-02-15 |
| CN106405410B CN106405410B (en) | 2024-04-26 |
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| CN106841876A (en) * | 2017-03-27 | 2017-06-13 | 国网福建省电力有限公司 | A kind of monitoring method of relay protection outlet pressing plate |
| CN108802598A (en) * | 2018-05-29 | 2018-11-13 | 国网河南省电力公司检修公司 | A kind of 1000 kilovolts of extra-high voltage series compensation protection exit loop test methods |
| CN108982946A (en) * | 2018-04-28 | 2018-12-11 | 深圳供电局有限公司 | A kind of platen potential change detecting device based on protection act contact |
| CN109298333A (en) * | 2018-11-28 | 2019-02-01 | 广东电网有限责任公司 | Protective relaying device detection method and device |
| CN110542805A (en) * | 2018-05-29 | 2019-12-06 | 国网河南省电力公司检修公司 | comprehensive relay protection outlet loop tester |
| CN113866534A (en) * | 2021-08-25 | 2021-12-31 | 广东电网有限责任公司广州供电局 | Secondary circuit signal detection system |
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| CN106841876A (en) * | 2017-03-27 | 2017-06-13 | 国网福建省电力有限公司 | A kind of monitoring method of relay protection outlet pressing plate |
| CN106841876B (en) * | 2017-03-27 | 2019-07-09 | 国网福建省电力有限公司 | A kind of monitoring method of relay protection outlet pressing plate |
| CN108982946A (en) * | 2018-04-28 | 2018-12-11 | 深圳供电局有限公司 | A kind of platen potential change detecting device based on protection act contact |
| CN108802598A (en) * | 2018-05-29 | 2018-11-13 | 国网河南省电力公司检修公司 | A kind of 1000 kilovolts of extra-high voltage series compensation protection exit loop test methods |
| CN110542805A (en) * | 2018-05-29 | 2019-12-06 | 国网河南省电力公司检修公司 | comprehensive relay protection outlet loop tester |
| CN109298333A (en) * | 2018-11-28 | 2019-02-01 | 广东电网有限责任公司 | Protective relaying device detection method and device |
| CN113866534A (en) * | 2021-08-25 | 2021-12-31 | 广东电网有限责任公司广州供电局 | Secondary circuit signal detection system |
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