CN106655076B - Site reliability of relay protection control device and relay protecting method - Google Patents
Site reliability of relay protection control device and relay protecting method Download PDFInfo
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- CN106655076B CN106655076B CN201611245065.8A CN201611245065A CN106655076B CN 106655076 B CN106655076 B CN 106655076B CN 201611245065 A CN201611245065 A CN 201611245065A CN 106655076 B CN106655076 B CN 106655076B
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- 230000004069 differentiation Effects 0.000 claims abstract description 39
- 230000009471 action Effects 0.000 claims abstract description 24
- 230000033001 locomotion Effects 0.000 claims abstract description 20
- 238000005070 sampling Methods 0.000 claims description 44
- 241000272814 Anser sp. Species 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000011217 control strategy Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012952 Resampling Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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Abstract
The present invention relates to site reliability of relay protection control device and relay protecting methods; starting control module is used to carry out starting logic discrimination according to the corresponding data information received; main control module is used to carry out relay protective scheme differentiation and starting logic discrimination according to the corresponding data information received; when the starting logic discrimination that starting control module and main control module carry out acts; and when the relay protective scheme differentiation movement of main control module progress, output protection action signal.The means of relay protection is made of two layers of logic judgment, it is necessary first to meet two starting logic discrimination movements, it only just can be according to relay protective scheme differentiation come output protection action signal after the two starting logic discrimination movements.So the relay protecting method reduces a possibility that site protection misoperation, so as to meet the requirement that site protection can still meet relay protection high reliability in exceedingly odious running environment.
Description
Technical field
The present invention relates to site reliability of relay protection control device and relay protecting methods, belong to electric system on the spot
Change technical field of relay protection.
Background technique
Protective relaying device is the important component of electric system, it is to guaranteeing that it is extremely important that system safety operation has
Effect.It cuts off faulty equipment in system jam, contributes to system safety operation, but relay protection not just
It is also huge that positive motion, which makees the harm caused by system,.Protective relaying device requires reliability, selectivity, sensitivity and rapidity
Unification, wherein reliability is the mostly important requirement of protective relaying device.
Site protective device be directly mounted at switch yard or with primary equipment integrated installation, due to directlying adopt outdoor nothing
Mounting means, running environment inclement condition are protected, simultaneously because it is nearby or directly integrated with primary equipment to be installed on primary equipment
Installation, the requirement to its mechanical performance are higher relative to conventional protective relaying device.Site protection setting using plug and play
Meter, using replaceable maintenance mode, can greatly promote the construction and O&M overhaul efficiency of substation, for the ease of carrying
And installation, it is desirable that site protective device uses Miniaturization Design.To sum up, the requirement degree of protection of site protective device it is high,
Strong antijamming capability, small in size, device power consumption is low, normal working temperature range is wide, therefore to the reliable of site protective device
Property design propose higher challenge, but conventional the means of relay protection reliability is lower, can not apply and protect in site
In device.
Summary of the invention
The object of the present invention is to provide site reliability of relay protection control device and relay protecting methods, to solve
The lower problem of conventional relay protecting method reliability.
To achieve the above object, the solution of the present invention includes a kind of site reliability of relay protection control device, including
Main control module, starting control module and two data sampling modules, described two data sampling modules are for acquiring power train
The related data information of system, described two data sampling modules, which export, connects the main control module and starting control mould
Block；The starting control module is used to carry out starting logic discrimination, the master control molding according to the corresponding data information received
Block is used to carry out relay protective scheme differentiation and starting logic discrimination according to the corresponding data information received；The control device also wraps
Control signal outlet module is included, the main control module and starting control module output connect the control signal outlet module,
It is described control signal outlet module be used for: when starting control module and main control module carry out starting logic discrimination act,
And when the relay protective scheme differentiation movement of main control module progress, output protection action signal.
Starting logic discrimination in the main control module are as follows: according to the collected correlation of described two data sampling modules
Data information carries out starting logic discrimination respectively, when acting, then it represents that the starting logic discrimination of main control module acts；Institute
Relay protective scheme in main control module is stated to differentiate are as follows: according to the collected related data information of any one data sampling module into
Row relay protective scheme differentiates, when movement, then it represents that the relay protective scheme differentiation of main control module acts；In the starting control module
Starting logic discrimination are as follows: starting logic is carried out according to the collected related data information of described two data sampling modules respectively
Differentiate, when acting, then it represents that start the starting logic discrimination movement of control module.
Before carrying out relay protective scheme differentiation and starting logic discrimination, to each in main control module and starting control module
Application condition is carried out from the related data information of two data sampling modules transmission in control module, when at least one controls mould
When error between the related data information of two data sampling modules transmission in block is greater than setting error, latch-up protection logic
Differentiate and otherwise starting logic discrimination continues relay protective scheme and differentiates and start logic discrimination.
The starting control module and substation's GOOSE network communicate to connect, for receiving and dispatching GOOSE signal.
The main control module is connect with starting control module by Ethernet, the GOOSE signal that main control module issues
It is sent in substation's GOOSE network by starting control module.
A kind of site relay protecting method, using the acquisition electric system of two data sampling modules dependency number it is believed that
Breath, and it is transferred to main control module and starting control module；The starting control module according to the respective counts received it is believed that
Breath carries out starting logic discrimination, and main control module carries out relay protective scheme differentiation according to the corresponding data information received and starting is patrolled
It collects and differentiates；When starting control module and main control module carry out starting logic discrimination act, and relay protective scheme differentiation act
When, output protection action signal.
Starting logic discrimination in the main control module are as follows: according to the collected correlation of described two data sampling modules
Data information carries out starting logic discrimination respectively, when acting, then it represents that the starting logic discrimination of main control module acts；Institute
Relay protective scheme in main control module is stated to differentiate are as follows: according to the collected related data information of any one data sampling module into
Row relay protective scheme differentiates, when movement, then it represents that the relay protective scheme differentiation of main control module acts；In the starting control module
Starting logic discrimination are as follows: starting logic is carried out according to the collected related data information of described two data sampling modules respectively
Differentiate, when acting, then it represents that start the starting logic discrimination movement of control module.
Before carrying out relay protective scheme differentiation and starting logic discrimination, to each in main control module and starting control module
Application condition is carried out from the related data information of two data sampling modules transmission in control module, when at least one controls mould
When error between the related data information of two data sampling modules transmission in block is greater than setting error, latch-up protection logic
Differentiate and otherwise starting logic discrimination continues relay protective scheme and differentiates and start logic discrimination.
The starting control module and substation's GOOSE network communicate to connect, to receive and dispatch GOOSE signal.
The main control module is connect with starting control module by Ethernet, the GOOSE signal that main control module issues
It is sent in substation's GOOSE network by starting control module.
In site protected mode provided by the invention, there are two completely self-contained control module, main control modules for setting
Corresponding logic discrimination is carried out in starting control module, wherein is opened in main control module and starting control module
Dynamic logic discrimination, and relay protective scheme differentiation is also carried out in main control module, only acts and protect there are two starting logic discrimination
Logic discrimination also acts, ability output protection action signal.The means of relay protection is made of two layers of logic judgment, it is necessary first to full
Foot two starting logic discriminations movement, only after the two starting logic discriminations act just can according to relay protective scheme differentiation come
Output protection action signal.This means of relay protection, relay provided by the invention are judged compared to relay protective scheme is directly carried out
Protected mode reduces a possibility that site protection misoperation, so as to meet site protection in exceedingly odious operation
The requirement of relay protection high reliability can still be met in environment.
Also, in logic judgment, the related data using two data sampling modules is judged, compared to only one
The accuracy and reliability of a data sampling module, logic judgment is improved, and is reduced only one data sampling module and is made
A possibility that at erroneous judgement.
Detailed description of the invention
Fig. 1 is the control principle schematic diagram of site reliability of relay protection control device.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
As shown in Figure 1, site reliability of relay protection control device provided by the invention includes two completely self-contained
The two control modules are referred to as main control module and starting control module for respective function by control module,
In the present embodiment, the two control modules are two sets of completely self-contained cpu systems being arranged on one piece of board, correspondingly,
This two sets of cpu systems are referred to as host CPU and starting CPU.
To save space, the CPU in this two sets of independent cpu systems is the cpu chip of high integration low-power consumption, such as core
Piece ZYNQ7020, inside are integrated with FPGA, and the equipment such as peripheral hardware RAM, Flash of each cpu chip are also completely independent.Using collection
At the high chip of degree, on the basis of meeting relay protection high reliability, additionally it is possible to it is lesser to guarantee that entire control device has
Size.
Due to carrying out corresponding logic discrimination inside the two CPU, the two CPU, which are inputted, corresponding electricity
Force system data information.Each CPU carries out logic discrimination according to corresponding data information, therefore, there are two which includes
Data sampling module.In the present embodiment, the object of electric power system data information collection is electronic mutual inductor, data sampling mould
What block detected is the SV digital quantity sampled signal of electronic mutual inductor.
As shown in Figure 1, the two data sampling modules export connection host CPU and starting CPU, two data sampling modules
The two-way SV digital quantity sampled signal of the electronic mutual inductor sampled is exported to host CPU and starting CPU.Host CPU and starting
CPU correspondingly handles two-way SV digital quantity sampled signal respectively.Wherein, in data sampling module, using point-to-point side
Formula receives sampling value message, to the advanced row digital quantity low-pass filtering of the message received, further according to sampling value message reception when
Mark carries out resampling, completes synchronization and the sampling rate conversion of different electronic mutual inductor sampled datas.Due to point-to-point mode,
The technological means such as low-pass filtering and resampling belong to routine techniques, just no longer illustrate here.
The function of host CPU includes starting logic discrimination, relay protective scheme differentiation and communicates with station level equipment, is started
The function of CPU includes starting logic discrimination and communicates with process layer devices.
The function of the logic discrimination of host CPU and starting CPU is described in detail below.
Host CPU carries out relay protective scheme differentiation respectively according to the two-way SV digital quantity sampled signal received and starting logic is sentenced
Not, starting CPU carries out starting logic discrimination according to the two-way SV digital quantity sampled signal received.
In the present embodiment, before starting logic discrimination and relay protective scheme differentiate, host CPU and starting CPU can also be first
Respective two-way SV digital quantity sampled signal is compared, i.e. progress application condition, as at least one of the two CPU
When the error between two-way SV digital quantity sampled signal in CPU is larger, as soon as that is, be greater than setting error when, without start patrol
Collect the necessity for differentiating and differentiating with relay protective scheme, then the relay protective scheme being directly latched in the two CPU differentiates and starts logic discrimination,
Otherwise, continue relay protective scheme and differentiate and start logic discrimination.Error is specially respective counts in two-way digital quantity sampled signal
According to error.Two data sampling modules can carry out double sampling to same data information, that will generate two sampled values, institute
With, application condition be the double sampling that same data information carries out sampled value error, such as: same voltage data information
Double sampling value.Moreover, being to be compared to the two-way digital quantity sampled signal in same CPU, and lead in application condition
It is without application condition between CPU and starting CPU.In addition, if in two-way digital quantity sampled signal in some CPU
It is related to a variety of data, such as: while including voltage data and current data, then, in error judgment, when at least one data
Error when being greater than corresponding setting error, such as: when the error of voltage data is larger and/or the error of current data is larger,
So mean that the error of this two-way digital quantity sampled signal is greater than setting error, i.e. two-way SV digital quantity sampling in the CPU
When error between signal is larger, the necessity just differentiated without starting logic discrimination and relay protective scheme is then directly latched the two
Relay protective scheme in CPU differentiates and starting logic discrimination.
After above-mentioned judgement, if error is smaller, host CPU is according to the respective digital amount sampled signal received
Relay protective scheme differentiation and starting logic discrimination are carried out respectively, meanwhile, start CPU according to the respective digital amount sampled signal received
Carry out starting logic discrimination；When host CPU and starting CPU carry out starting logic discrimination act, and host CPU carry out protection patrol
When collecting differentiation movement, output protection action signal.That is, only on the basis of two-way starting logic discrimination acts,
If relay protective scheme differentiation also acts, that is with regard to output protection action signal.So being not output protection movement when following situation
Signal, such as: at least starting logic discrimination does not act all the way；Or relay protective scheme differentiation is failure to actuate.
Wherein, the starting logic discrimination in host CPU are as follows: starting logic is carried out according to two-way SV digital quantity sampled signal and is sentenced
Not, every road sampled signal carries out one-shot logic discrimination, then when this starts logic discrimination twice and acts, then it represents that
The starting logic discrimination of host CPU acts.Relay protective scheme in host CPU differentiates are as follows: according in two-way SV digital quantity sampled signal
Any one circuit-switched data carries out a relay protective scheme and differentiates, when secondary relay protective scheme differentiation movement, then it represents that the protection of host CPU is patrolled
Collect differentiation movement.Start the starting logic discrimination in CPU are as follows: starting logic is carried out according to two-way SV digital quantity sampled signal respectively
Differentiating, every road sampled signal carries out one-shot logic discrimination, then when this starts logic discrimination twice and acts, then table
Show the starting logic discrimination movement of starting CPU.
Wherein, relay protective scheme is determined as conventional relay protection movement judgement, and the type of relay protection is the prior art, than
If any: differential protection, distance protection, overcurrent protection etc., the decision plan about these relay protections also belong to routine techniques,
Here the type for the relay protection for just no longer specifically describing, and carrying out in the host CPU is depending on specific application.Starting is patrolled
It collects and differentiates whether specially differentiation operating status mutates, such as: judge whether electric current is sent out according to collected current information
Raw mutation, or peak voltage is judged whether there is according to collected information of voltage.In addition, different relay protective scheme differentiate and
The parameter that starting logic discrimination needs may be different, still, since relay protective scheme differentiates and start that logic discrimination belongs to often
Rule technology, then also being belonged to according to the corresponding relay protective scheme differentiation of corresponding digital quantity sampled signal progress or starting logic discrimination
In routine techniques, the present embodiment is just no longer illustrated.
Above-mentioned control strategy can also realize that the control signal outlet module connects by a control signal outlet module
Receive host CPU and start CPU output differentiation as a result, and to these differentiate results handle, treatment process is just above-mentioned control
Strategy is acted when host CPU with the starting logic discrimination that CPU is carried out is started, and the relay protective scheme differentiation that host CPU carries out also is moved
When making, signal outlet module output protection action signal is controlled.
The control signal outlet module can be control chip, and inside is loaded with the software converted according to above-mentioned control strategy
Program is handled according to output signal of the software program to host CPU and starting CPU.Certainly, the control signal outlet module
It can also be specific hardware configuration, in the present embodiment, provide the specific embodiment of the hardware configuration.The hardware knot
Structure includes a route, and string is set there are two control switch on the route, and the driving circuit of one outlet control element passes through by this
The series circuit that two control switches are constituted is connected to outlet positive supply.Wherein, control of export element is exit relay, by leading
CPU control, two control switches are respectively by host CPU and starting CPU independent control.When starting logic discrimination is judged to acting,
Correspondingly control switch is closed for control, so, the two control switches can be electronic control type switching device, such as IGBT, may be used also
To be the contact of relay.In the present embodiment, the two control switches are the contact of relay, and correspondingly, the hardware configuration is also
Including two starting control elements, the two starting control elements are the control coil of two relays, respectively with it is above-mentioned two
Contact is corresponding.The two starting control elements respectively by host CPU and starting CPU independent control, as shown in Figure 1, the two after
Driving signal of the contact of electric appliance for open outlet control element.
Host CPU and starting CPU carry out starting logic discrimination respectively, when meeting operation condition, driving starting control element,
Make corresponding contact closure；Host CPU carries out relay protective scheme differentiation, when meeting operation condition, drives control of export element.Institute
With, when the starting logic discrimination that host CPU and starting CPU are carried out meets operation condition, corresponding two contact closures.This
When, if the relay protective scheme differentiation that host CPU carries out also complies with operation condition, on the basis of two contact closures, control of export
The driving coil of element just it is electric, control of export element can just export, i.e., can export relay protection action signal.Also
It is to say, on the basis of the starting logic discrimination that only host CPU and starting CPU carry out acts, if the protection that host CPU carries out is patrolled
Differentiation is collected also to act, then, just export relay protection action signal.
In addition, connecting between host CPU and starting CPU by ethernet communication, action signal and other signals are realized
Interaction.Also, it is also communicatively coupled between starting CPU and the GOOSE network of substation.The action signal that host CPU issues
Multichannel can be divided into, in the present embodiment, be divided into two-way, controlled all the way for the trip operation of normal relay protection, it is another
Road is transmitted to starting CPU by Ethernet, starts in network of the CPU for the GOOSE that action signal is transferred to substation.
Moreover, starting CPU decides whether to send host CPU dynamic according to starting differentiation logical consequence in the present embodiment
It is sent in GOOSE network as signal, specific as follows: host CPU is issued by communications command to starting CPU during being powered on and initialized
Bitmask is exported, if the starting logic starting of starting CPU, by the action signal of host CPU and outlet bitmask Xiang Yuhou
It is exported；If it is inactive to start CPU starting logic, outlet bitmask is negated, then by the action signal of host CPU
It is exported with after with negated outlet bitmask phase.
In above-described embodiment, the starting logic discrimination and relay protective scheme given in host CPU differentiates and starts in CPU
Starting logic discrimination concrete mode, certainly, the invention is not limited to above embodiment, as other embodiment party
Formula, starting logic discrimination and relay protective scheme in host CPU differentiate and starting CPU in starting logic discrimination can be with root
Differentiated according to any one circuit-switched data in two-way SV digital quantity sampled signal；Or all in accordance with two-way SV digital quantity sampled signal
Differentiated, when simultaneously operation, then corresponding logic discrimination movement.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention
This thinking is the Baseline Control Strategy of above-mentioned relay protection, for those of ordinary skill in the art, is controlled substantially based on this
Strategy provides optimally embodiment for relevant technical characteristic, does not need to spend creative work.This is not being departed from
The change, modification, replacement and modification carried out in the case where the principle and spirit of invention to embodiment still fall within guarantor of the invention
It protects in range.
Claims (4)
1. a kind of site reliability of relay protection control device, which is characterized in that including main control module, starting control module
With two data sampling modules, described two data sampling modules are used to acquire the related data information of electric system, and described two
A data sampling module, which exports, connects the main control module and the starting control module；The starting control module is used for
Starting logic discrimination is carried out according to the corresponding data information received, the main control module is used for according to the respective counts received
It is believed that breath carries out relay protective scheme differentiation and starting logic discrimination；The control device further includes control signal outlet module, described
Main control module and starting control module output connect the control signal outlet module, and the control signal outlet module is used
In: when starting control module and main control module carry out starting logic discrimination act, and main control module carry out protection
When logic discrimination acts, output protection action signal；Before carrying out relay protective scheme differentiation and starting logic discrimination, master control molding
The related data information of two data sampling modules transmission in respective control module is carried out in block and starting control module
Application condition, when the error between the related data information of two data sampling modules transmission at least one control module is big
When setting error, otherwise latch-up protection logic discrimination and starting logic discrimination continue relay protective scheme differentiation and starting are patrolled
It collects and differentiates；
The starting control module and substation's GOOSE network communicate to connect, for receiving and dispatching GOOSE signal；The master control molding
Block is connect with starting control module by Ethernet, and the GOOSE signal that main control module issues is sent by starting control module
Into substation's GOOSE network；
The starting control module differentiates that logical consequence decides whether the action signal for sending main control module according to starting
It is sent in GOOSE network: outlet being issued to starting control module by communications command during main control module power-up initializing
Bitmask, if the starting logic starting of starting control module, by the action signal of main control module and outlet bitmask
Mutually exported with after；If it is inactive to start control module starting logic, outlet bitmask is negated, then by master control
The action signal of molding block is exported with after with negated outlet bitmask phase.
2. site reliability of relay protection control device according to claim 1, which is characterized in that the master control molding
Starting logic discrimination in block are as follows: started respectively according to the collected related data information of described two data sampling modules
Logic discrimination, when acting, then it represents that the starting logic discrimination of main control module acts；Protection in the main control module
Logic discrimination are as follows: relay protective scheme differentiation is carried out according to the collected related data information of any one data sampling module, when dynamic
When making, then it represents that the relay protective scheme differentiation of main control module acts；Starting logic discrimination in the starting control module are as follows: root
Starting logic discrimination is carried out respectively according to the collected related data information of described two data sampling modules, when acting, then
Indicate the starting logic discrimination movement of starting control module.
3. a kind of site relay protecting method, which is characterized in that utilize the phase of two data sampling module acquisition electric system
Data information is closed, and is transferred to main control module and starting control module；The starting control module is according to the phase received
Data information is answered to carry out starting logic discrimination, main control module carries out relay protective scheme differentiation according to the corresponding data information received
With starting logic discrimination；When the starting logic discrimination that starting control module and main control module carry out acts, and relay protective scheme
When differentiation acts, output protection action signal；Carry out relay protective scheme differentiation and starting logic discrimination before, main control module and
Start in control module and error is carried out to the related data information of two data sampling modules transmission in respective control module
Compare, is set when the error between the related data information of two data sampling modules transmission at least one control module is greater than
When determining error, otherwise latch-up protection logic discrimination and starting logic discrimination continue relay protective scheme and differentiate and start that logic is sentenced
Not；
The starting control module and substation's GOOSE network communicate to connect, for receiving and dispatching GOOSE signal；The master control molding
Block is connect with starting control module by Ethernet, and the GOOSE signal that main control module issues is sent by starting control module
Into substation's GOOSE network；
The starting control module differentiates that logical consequence decides whether the action signal for sending main control module according to starting
GOOSE is sent into GOOSE network: main control module be powered on and initialized during by communications command to starting control module under
Mouth bitmask is issued, if the starting logic starting of starting control module, by the action signal and outlet of main control module
Bitmask phase is exported with after；If it is inactive to start control module starting logic, outlet bitmask is negated, then
The action signal of main control module and negated outlet bitmask phase are exported with after.
4. site relay protecting method according to claim 3, which is characterized in that the starting in the main control module
Logic discrimination are as follows: starting logic discrimination is carried out according to the collected related data information of described two data sampling modules respectively,
When acting, then it represents that the starting logic discrimination of main control module acts；Relay protective scheme in the main control module differentiates
Are as follows: relay protective scheme differentiation is carried out according to the collected related data information of any one data sampling module, when movement, then table
Show the relay protective scheme differentiation movement of main control module；Starting logic discrimination in the starting control module are as follows: according to described two
A collected related data information of data sampling module carries out starting logic discrimination respectively, when acting, then it represents that starting
The starting logic discrimination of control module acts.
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| CN201611245065.8A CN106655076B (en) | 2016-12-29 | 2016-12-29 | Site reliability of relay protection control device and relay protecting method |
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| CN201611245065.8A CN106655076B (en) | 2016-12-29 | 2016-12-29 | Site reliability of relay protection control device and relay protecting method |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631257B (en) * | 2018-05-10 | 2020-03-17 | 许继集团有限公司 | In-situ component protection system |
| CN108512199B (en) * | 2018-05-10 | 2020-05-22 | 许继集团有限公司 | On-site element protection system |
| CN108963955B (en) * | 2018-06-22 | 2019-12-13 | 国网辽宁省电力有限公司电力科学研究院 | Integrated intelligent terminal for on-site protection |
| CN109088400B (en) * | 2018-08-07 | 2020-08-11 | 许继集团有限公司 | Distributed protection method and system |
| CN109616998B (en) * | 2018-12-21 | 2020-06-09 | 南京国电南自电网自动化有限公司 | Method for judging and processing voltage inconsistency of relay protection device based on double CPU sampling |
| CN113675811A (en) * | 2020-05-14 | 2021-11-19 | 国网福建省电力有限公司电力科学研究院 | CPU plug-in and relay protection device based on SOC chip |
| CN111682867B (en) * | 2020-06-19 | 2024-04-02 | 深圳市麦积电子科技有限公司 | Trigger circuit |
| CN112202145B (en) * | 2020-10-13 | 2023-05-23 | 长园深瑞继保自动化有限公司 | Method and device for preventing false outlet of in-situ microcomputer relay protection device |
| CN114035499A (en) * | 2021-11-13 | 2022-02-11 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Wireless communication device and method for remote dual-protection control |
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