CN109656146A - Relay Protection Experiment System based on emulation technology - Google Patents
Relay Protection Experiment System based on emulation technology Download PDFInfo
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- CN109656146A CN109656146A CN201811391180.5A CN201811391180A CN109656146A CN 109656146 A CN109656146 A CN 109656146A CN 201811391180 A CN201811391180 A CN 201811391180A CN 109656146 A CN109656146 A CN 109656146A
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- relay protection
- signal
- emulation
- relay
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
Abstract
The present invention provides a kind of Relay Protection Experiment System based on emulation technology.The system includes: relay protection device, for receiving from extraneous circuit signal, is acted according to information and generates Real-time Feedback signal；Embedded emulation device generates real not time circuit parameter for receiving the feedback information from the relay protection device；PC control device, for establishing the mathematical model of relay protection device, and by the real not time circuit parameter display in the mathematical model of the relay protection device.This disclosure relates to the Relay Protection Experiment System based on emulation technology, can be improved maintenance quality of experiments, the more efficiently reliability for ensureing power supply.
Description
Technical field
The present invention relates to computer information processing fields, in particular to a kind of relay protection based on emulation technology
Experimental system.
Background technique
Relay equipment is a kind of important testing tool for guaranteeing power system security reliability service.With modern power systems
The continuous expansion of scale, to the continuous improvement that reliability, the high efficiency of Operation of Electric Systems and management require, relay protection personnel
Test job become more frequently and complicated.In the present that computer technology, microelectric technique, power electronic technique develop rapidly
It, the inexorable trend that novel high-performance relay protection test platform is technological progress is constantly released using latest technological achievements,
It is the responsibility for assigning us epoch.
But keeping updating with relay protection devices, the continuous research and innovation of Preservation tactics, to maintenance operation maintenance personnel
For training also to becoming more and more important.But for relay protection devices access transmission line of electricity itself, realize training goal
Difficulty is quite big, and one is that the polymorphic type line fault that relay protection test requires in Practical Project condition is unable to satisfy, another
Be that the movements of relay protection devices also interacts to power grid operation, and forceful electric power experiment itself personnel safety is endangered it is big.
Therefore, it is necessary to a kind of new Relay Protection Experiment Systems based on emulation technology.
It is only used for reinforcing the reason to background disclosed by the invention in the above- mentioned information of the background technology part disclosure of the invention
Solution, therefore it may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
In view of this, the present invention discloses a kind of Relay Protection Experiment System based on emulation technology, it is real to can be improved maintenance
The amount of checking the quality, the more efficiently reliability for ensureing power supply.
Other characteristics and advantages disclosed by the invention will be apparent from by the following detailed description, or partially by this
The practice of disclosure of the invention and acquistion.
Disclosed one side according to the present invention, proposes a kind of Relay Protection Experiment System based on emulation technology, the system
It include: relay protection device, for receiving from extraneous circuit signal, being acted according to information and generating Real-time Feedback letter
Number；Embedded emulation device generates real not time circuit parameter for receiving the feedback information from the relay protection device；On
Position machine control device, for establishing the mathematical model of relay protection device, and by the real not time circuit parameter display it is described after
In the mathematical model of electric protection equipment.
In a kind of exemplary embodiment disclosed by the invention, PC control device is also used to generate control signal, institute
Control signal is stated to be acted for controlling the relay protection device.
In a kind of exemplary embodiment disclosed by the invention, embedded emulation device is also used to receive from described
The control signal of PC control device, and circuit signal is converted by the control signal, it is set with controlling the relay protection
It is standby to be acted.
In a kind of exemplary embodiment disclosed by the invention, the relay protection device and the embedded emulation device
By the circuit connection for being used for transmission analog signal.
In a kind of exemplary embodiment disclosed by the invention, the embedded emulation device and the PC control are filled
It sets and is linked by the communication link for being used for transmission digital signal.
In a kind of exemplary embodiment disclosed by the invention, relay protection device includes: reception signal element, for connecing
It receives from the extraneous circuit signal, the circuit signal includes analog signal, with digital signal；And motor unit, it uses
In Real-time Feedback signal is acted and generated according to the circuit signal, the feedback signal is electric signal.
In a kind of exemplary embodiment disclosed by the invention, embedded emulation device includes: model of power transmission system module,
For building multiple model of power transmission system, the model of power transmission system is constructed by VS2013；Signal conversion module is used for mould
Quasi- signal be converted to digital signal and or convert digital signals into analog signal.
In a kind of exemplary embodiment disclosed by the invention, upper computer control module includes: relay model module, is used
In the building relay model；Three-dimensional display module, for being opened up on the relay model by way of threedimensional model
Show the real not time circuit parameter.
In a kind of exemplary embodiment disclosed by the invention, upper computer control module further include: control signaling module is used
Control signal is generated in receiving user instructions, the control signal is acted for controlling the relay protection device.
In a kind of exemplary embodiment disclosed by the invention, the control signaling module includes: model emulation module, is used
In the mathematical model for showing the relay protection device, the user is received in the mathematical model of the relay protection device and is produced
Raw control signal.
The disclosed Relay Protection Experiment System based on emulation technology according to the present invention, can be improved maintenance quality of experiments,
The more efficiently reliability for ensureing power supply.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Disclosure of the invention.
Detailed description of the invention
It is described in detail its example embodiment by referring to accompanying drawing, above and other target disclosed by the invention, feature and excellent
Point will become apparent.Drawings discussed below is only some embodiments disclosed by the invention, for this field
For those of ordinary skill, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of system of Relay Protection Experiment System based on emulation technology shown according to an exemplary embodiment
Block diagram.
Fig. 2 is a kind of system of Relay Protection Experiment System based on emulation technology shown according to an exemplary embodiment
Block diagram.
Fig. 3 is a kind of system of Relay Protection Experiment System based on emulation technology shown according to an exemplary embodiment
Block diagram.
Fig. 4 is a kind of system of Relay Protection Experiment System based on emulation technology shown according to an exemplary embodiment
Operational flow diagram.
Fig. 5 is a kind of system of Relay Protection Experiment System based on emulation technology shown according to an exemplary embodiment
The schematic diagram of operation.
Fig. 6 is a kind of system of Relay Protection Experiment System based on emulation technology shown according to an exemplary embodiment
The schematic diagram of operation.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be real in a variety of forms
It applies, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that of the invention disclose will be comprehensive
With it is complete, and the design of example embodiment is comprehensively communicated to those skilled in the art.The identical appended drawing reference in figure
It indicates same or similar part, thus repetition thereof will be omitted.
In addition, described feature, structure or characteristic can be incorporated in one or more implementations in any suitable manner
In example.In the following description, many details are provided to provide and fully understand to embodiment disclosed by the invention.So
And it will be appreciated by persons skilled in the art that technical solution disclosed by the invention can be practiced without one in specific detail
Or more, or can be using other methods, constituent element, device, step etc..In other cases, it is not shown in detail or describes
Known method, device, realization or operation are to avoid various aspects disclosed by the invention are obscured.
Block diagram shown in the drawings is only functional entity, not necessarily must be corresponding with physically separate entity.
I.e., it is possible to realize these functional entitys using software form, or realized in one or more hardware modules or integrated circuit
These functional entitys, or these functional entitys are realized in heterogeneous networks and/or processor device and/or microcontroller device.
Flow chart shown in the drawings is merely illustrative, it is not necessary to including all content and operation/step,
It is not required to execute by described sequence.For example, some operation/steps can also decompose, and some operation/steps can close
And or part merge, therefore the sequence actually executed is possible to change according to the actual situation.
It should be understood that although herein various assemblies may be described using term first, second, third, etc., these groups
Part should not be limited by these terms.These terms are to distinguish a component and another component.Therefore, first group be discussed herein below
Part can be described as the second component without departing from the teaching of public concept of the present invention.As used herein, term " and/or " include phase
The associated all combinations for listing any of project and one or more.
It will be understood by those skilled in the art that attached drawing is the schematic diagram of example embodiment, module or process in attached drawing
Necessary to not necessarily implementing of the invention disclose, therefore it cannot be used for limiting protection scope disclosed by the invention.
It is disclosed by the invention inventors have found that relay equipment be guarantee power system security reliability service difficulties master
Show the following aspects:
(1) enough attention are lacked to the O&M maintenance of protective relaying device.
Maintenance and maintenance to relay protection devices are a complicated dull job, and many electric power enterprises are only regarded as necessary
The work to be completed is dealt with, and does not recognize that the importance that relay protection maintenance work operates normally power grid, so that fixed
The maintenance work of phase tends to come to the surface and sequencing, in addition the purpose of service personnel's clear service work not from principle, leads
Cause some problems present in it that cannot be found and be solved in time, or in order to power cut-off as early as possible rush through so that some
Problem is directly ignored, and security risk is left.
(2) indefinite to relay protection devices rolling inspection and maintenance purpose.
Equipment O&M is needed with definition, and device structure and function are grasped from principle, in this way could be in daily fortune
Dimension work in it is careful and responsible check equipment there are the problem of hidden danger.But in current many technical staff to the reality of relay protection devices
Working principle do not know about simultaneously, is unaware of the importance of the work such as O&M maintenance, often there is deal with to get at work
Situation, some minor issues often not note that so as to cause security risk generation.
(3) technical staff itself is horizontal unqualified.
With the development of science and technology, in terms of some new technologies and new equipment are all constantly applied to relay protection, this is just
Technical professional is needed to carry out the development of adaptive technique.But O&M and service personnel's profession in current some power industries
That comes from is less, has half knowledge relay protection knowledge, technology not really up to the mark, brings to the maintenance and repair work of relay protection devices
Large effect.Some older service personnel, the existing structure of knowledge can not increasingly adapt to current skill simultaneously
Art development, while new knowledge can not be grasped well again, so these situations all make technical staff pass through profession training
The efficiency of instruction is relatively low.
The above problem be all current power industry not to have system in terms of relay protection and efficiently the measure of training cause
, therefore the present invention is disclosed and proposes a kind of Relay Protection Experiment System based on emulation technology, semi-true object emulation technology introduces
Power industry has big advantage for staffs training, and many realities can be not only simulated by simulator and are difficult to reality
Existing experiment condition, and the structure function characteristic of equipment itself can be observed by entity device simultaneously, it also reduces simultaneously
Security risk is tested, most of training cost has been saved.
Wherein, emulation (the Hardware in the Loop of HWIL simulation, also known as hardware in the loop
Simulation), refer to the real-time simulation that access part is in kind in the emulation circuit of simulating experimental system.Real-time is to carry out
The prerequisite of HWIL simulation.
HWIL simulation has a possibility that economically realizing higher validity compared with other types of emulation mode.From
From the viewpoint of system, HWIL simulation allows to access part material object in systems, it is meant that part material object can be placed on and is
It is investigated in system, to allow the components to be examined in the environment for meeting systematic entirety energy index, therefore half is in kind imitative
Really improve the reliability of system design and the necessary means of development quality.
The system that the present invention discloses proposition, it is intended to build platform and relay protection is carried out with service personnel to relay protection devices operation
The principle teaching, training of pilot project, so that service personnel understands maintenance purpose, clear repair method, understands maintenance step,
The technical level of service personnel is improved, improves checking experiment quality, the more efficiently reliability for ensureing power supply, and compare it
His company's semi-physical emulation platform, can also replace practical relay protection devices with programmable controllers such as PLC, while allow start-up
Equipment working state is understood from principle by the programming study to controller, to save a part of training cost again.
Below in conjunction with specific embodiments come to the present invention disclose in content be described in detail.
Fig. 1 is a kind of system of Relay Protection Experiment System based on emulation technology shown according to an exemplary embodiment
Block diagram.As shown in Figure 1, the Relay Protection Experiment System based on emulation technology can include: relay protection device 102, it is embedded imitative
True device 104, PC control device 106.
Relay protection device 102 is used to receive from extraneous circuit signal, is acted and is generated in real time according to information
Feedback signal.When in electric system force device (such as generator, route) or electric system itself failure has occurred and jeopardizes
When safe operation of power system, it can send warning signal in time to operator, or directly to the open circuit controlled
Device issues trip signal to terminate a kind of automation measure and equipment of the development of these events.Realize this automation measure at
Equipment is covered, protective relaying device is generally commonly referred to as.
Relay protection is mainly electrical quantity (electric current, electricity when utilizing element in electric system that short circuit or abnormal conditions occur
Pressure, power, frequency etc.) variation constitute the principle of relay protection movement, there are also other physical quantitys, as in oil tank of transformer therefore
The a large amount of gas and the increase of oil stream speed supervened when barrier or increasing for oil pressure intensity.
In most cases, not which kind of physical quantity of tube reaction, protective relaying device all include (and the definite value adjustment of measurement part
Part), logical gate, execution part.
Parameter (such as electric current, voltage, power-factor angle) in Operation of Electric Systems is when operating normally and fault condition
There is significant difference.Protective relaying device is exactly the variation using these parameters, judges electric power on the basis of reflection, detection
The property and range of the system failure, and then make corresponding reaction and handle and (such as send warning signal or enable circuit breaker trip
Deng).
Embedded emulation device 104 generates real not time circuit for receiving the feedback information from the relay protection device
Parameter.Embedded emulation device is the core technology part of platform.It supports transmission line of electricity with hardware technologies such as FPGA, ARM
Model is built, core CPU high-speed computation Operation of Electric Systems parameter, simulates the transmission line status of different faults type, and
The signals such as output fault current voltage in real time.
In one embodiment, embedded emulation device 104 is also used to receive from the PC control device
Signal is controlled, and converts circuit signal for the control signal, is acted with controlling the relay protection device.
PC control device 106 is used to establish the mathematical model of relay protection device, and by the real not time circuit parameter
It shows in the mathematical model of the relay protection device.It can not only be opened up for the host computer interface that staffs training is specially built
The state of route when showing reaying protection test, moreover it is possible to which the movement of relay in intuitive relay protection devices makes technical staff systematically
The entire test process of solution, reaches training purpose.The training platform built using semi-true object emulation technology not only can highly emulate electricity
Force system transmission line parameter, and avoid the influence to actual electric network, operation when, are also safer, so that technology people
Member's study get up it is more convenient efficiently, and save the expense of a very big training equipment.
In one embodiment, PC control device 106 is also used to generate control signal, and the control signal is for controlling
The relay protection device is made to be acted.
In one embodiment, the relay protection device and the embedded emulation device are by being used for transmission simulation letter
Number circuit connection.
In one embodiment, the embedded emulation device and the PC control device are by being used for transmission number
The communication link of signal links.
Relay protection device 102 connects embedded equipment 104 by particular communication mode, completes the data to transmission line of electricity
It monitors and makes corresponding protection act instruction feedback after collecting fault-signal to transmission line simulation, complete whole system
Closed-loop control.(part more can be used PLC and replace practical protective relaying device, pass through the specific volume of technical staff on PLC
Journey reaches the relevant control demand to route, so that technical staff is understood the relevant knowledge of reaying protection test, more can
The meaning of relay protection is understood from principle).
By the reaying protection test training platform, can effectively helping company personnel, preferably clear relay protection is each
Test purpose, principle and operating method step be to really understand the importance of protective relaying device in electric system
The training of system is to each testing regulations, thus the outstanding conscientious completion work in maintenance maintenance work.And pass through the platform
Build, grid company can save the expense for buying practical training apparatus, save training cost, improve electric power enterprise
Economic benefit.
Since the equipment price that can be realized HWIL simulation at present is expensive, only provincial a small number of units can be purchased, and right
The technical requirements of user of service are high.After the achievement is realized, protection practitioners at different levels all chances can be made to share half in kind
Emulation technology bring is convenient, and the working principle of protection is understood and grasped using semi-true object emulation technology, by it is embedded can
Relay protection algorithm is developed on programmable controller, achievees the purpose that know that it so also knows its reason.Therefore in each level of each county telephone central office, city
Unit has promotional value.
Fig. 2 is a kind of system of Relay Protection Experiment System based on emulation technology shown according to an exemplary embodiment
Block diagram.As shown in Fig. 2, the relay protection device 102 in the Relay Protection Experiment System based on emulation technology includes: reception signal
Unit 1022, motor unit 1024；Embedded emulation device 104 includes: model of power transmission system module 1042, signal conversion module
1044；Upper computer control module 106 includes: relay model module 1062, and three-dimensional display module 1064 controls signaling module
1066。
Wherein, the relay protection device 102 in the Relay Protection Experiment System based on emulation technology includes:
It receives signal element 1022 to be used to receive from the extraneous circuit signal, the circuit signal includes simulation letter
Number, with digital signal；And
Motor unit 1024 according to the circuit signal for being acted and being generated Real-time Feedback signal, the feedback letter
Number be electric signal.
Wherein, embedded emulation device 104 includes:
For building multiple model of power transmission system, the model of power transmission system passes through model of power transmission system module 1042
VS2013 building；
Signal conversion module 1044 for convert analog signals into digital signal and or convert digital signals into simulation
Signal.
Wherein, upper computer control module 106 includes:
Relay model module 1062 is for constructing the relay model；
Three-dimensional display module 1064 is described real-time for being shown on the relay model by way of threedimensional model
Circuit parameter.
For control signaling module 1066 for receiving user instructions generation control signal, the control signal is described for controlling
Relay protection device is acted.The control signaling module includes: model emulation module, for showing that the relay protection is set
Standby mathematical model receives the control signal that the user generates in the mathematical model of the relay protection device.
Fig. 3 is a kind of system of Relay Protection Experiment System based on emulation technology shown according to an exemplary embodiment
Block diagram.Fig. 3 illustratively illustrates the communication connection in the Relay Protection Experiment System based on emulation technology between each device
Relationship.
Embedded emulation device is the core technology part of platform.It supports to transmit electricity with hardware technologies such as FPGA, ARM
Circuit model is built, core CPU high-speed computation Operation of Electric Systems parameter, simulates the transmission line of electricity shape of different faults type
State, and the signals such as fault current voltage are exported in real time.
Practical relay protection devices connect embedded equipment by particular communication mode, complete the data monitoring to transmission line of electricity
And corresponding protection act instruction feedback is made after collecting fault-signal to transmission line simulation, complete the closed loop of whole system
Control.(part more can be used PLC and replace practical protective relaying device, be reached on PLC by the certain programmed of technical staff
To the relevant control demand to route, technical staff can not only be made to understand the relevant knowledge of reaying protection test, it more can be from original
The meaning of relay protection is understood in reason).
Host computer, route when can not only show reaying protection test for the host computer interface that staffs training is specially built
State, moreover it is possible to the movement of relay in intuitive relay protection devices makes technical staff systematically understand entire test process, reaches training
Instruct purpose.The training platform built using semi-true object emulation technology not only can highly emulate power system transmission line parameter, and
And avoid influence to actual electric network, operation when, is also safer so that technical staff's study get up it is more convenient high
Effect, and save the expense of a very big training equipment.
Major function of the training platform when being researched and developed is as follows:
(1) model of power transmission system is built under simulation software and develops the algorithm of relay protection devices current protection items test,
Ensure the correctness of test effect.
(2) it is developed, is built under VS2013 environment for the test algorithm of model of power transmission system and each relay protection devices
Master system.
(3) embedded module is researched and developed, and is interconnected with master system, complete test Training Environment is formed.
Fig. 4 is a kind of process of emulation experiment method for relay protection shown according to an exemplary embodiment
Figure.Emulation experiment method for relay protection includes at least step S402 to S408.
As shown in figure 4, generating control signal according to user instructions in S402, the control signal is digital signal.
In S404, circuit signal is converted for the control signal based on model of power transmission system.Based on transmission line of electricity mould
It includes: that multiple model of power transmission system are constructed in embedded emulation device that the control signal is converted circuit signal by type；Root
One in the multiple model of power transmission system is determined according to the control signal；And by determining model of power transmission system by institute
It states control signal and is converted into the circuit signal.
Wherein, embedded emulation device refer to it is application-centered, based on computer technology, hardware and software can be cut out
It cuts, adapt to the dedicated computer system that application system is strict with function, reliability, cost, volume, power consumption.In this platform
The embedded system of research and development can carry out height emulation to practical transmission line of electricity, and practical transmission line of electricity hair is being simulated in high-speed computation
Data can accurately be exported to physical device when the relay equipment action test of raw failure, and with host computer system
System interaction, so as to accurately simulate practical operation, and accurately exports test result, it is ensured that the high emulation of test.
In S406, relay protection device is received from the external circuit signal, is carried out according to the circuit signal
It acts and generates feedback signal.It include programmable PLC in the relay protection device.
In S408, the relay protection device is analyzed according to the feedback signal.According to the feedback signal
Carrying out analysis to the relay protection device includes: that the feedback signal is carried out analog-to-digital conversion, generates analysis data；And root
The relay protection device is analyzed according to the analysis data.
In one embodiment, according to the analysis data to the relay protection device carry out analysis include: receive come
From the feedback information of the relay protection device, real not time circuit parameter is generated；And by the real not time circuit parameter to described
Relay protection device is analyzed.
In one embodiment, carrying out analysis to the relay protection device by the real not time circuit parameter includes: structure
Build multiple experiment algorithm models；And the relay protection device is analyzed by the multiple experiment algorithm model.
Specifically can for example, be directed to different relay protection devices actual characteristic and functional requirement, build the defeated of different faults type
Electric line model, the abnormal signal acquired needed for being provided for relay protection devices.Grid equipment modeling method and achievement are used for reference, selection is closed
Suitable exploitation environment establishes the model of all kinds of transmission lines of electricity, and the feasibility and reasonability of model are carried out with practical relay protection devices
Verifying.
It can also be for example, collecting the test objective and method and each examination of relay equipment three-step charging items test
Points for attention in testing carry out the algorithm development that relay protection devices are tested item by item, so that opening in conjunction with the model of power transmission system developed
The pilot project of hair can strictly simulate the test of the relay protection items in practical service work.
In one embodiment, further includes: analysis result is subjected to three-dimensional display.
The disclosed emulation experiment method for being used for relay protection according to the present invention, can simulate power circuit different type
Failure, different Preservation tactics, protect the protection of equipment dynamic etc., improve the technical level of substation equipment maintenance and repair personnel, improve maintenance
Quality of experiments, the more efficiently reliability for ensureing power supply.
Fig. 5 is a kind of signal of the emulation experiment method for relay protection shown according to another exemplary embodiment
Figure.Fig. 5 illustratively illustrate to disclose through the invention in the emulation experiment method for relay protection carry out it is instantaneous
Current quick (I section of electric current) test:
According to the requirement to relay protection quick-action, the time of protective device excision failure must satisfy system stabilization and protect
Protect the reliability of responsible consumer power supply.Under the premise of simple, reliable and guarantee selectivity, always The faster the better in principle.Cause
This should make every effort to the protective relaying device for installing quick acting on various electrical components.Increase and wink for only reacting on electric current
When the current protection that acts, referred to as transient current fast tripping protection.As shown in Figure 5, it is assumed that be equipped with transient current on every route
Fast tripping protection, then when a certain line failure, it is desirable to the protection energy snap action of this section of route, and protection scope is preferably
Reach the 100% of this total track length.By taking protection 2 as an example, when the k1 point short circuit of this line end, it is desirable to which fast tripping protection 2 being capable of wink
When movement excision failure, and when the beginning k2 point short circuit of adjacent lines BC, according to the requirement of selectivity, fast tripping protection 2 is just not
It should act, because failure should be cut off by fast tripping protection 1 at this.But in fact, pass through protection 2 when k1 point and k2 point short circuit
Short circuit current numerical value be almost it is the same, protect the short circuit of 2 indistinguishable k1 points and k2 point.
Test method: for the selectivity of safety action, guarantee next by the adjusting of protective device start-up parameters
It is inoperative when short circuit at line outlet, referred to as adjusted by the condition for avoiding short circuit at next line outlet.For protection 1,
Its action current definite value Iact.1 is likely to occur to obtain maximum short circuit current when must adjust to be greater than the short circuit of k4 point, i.e., maximum operation
Electric current Ik.C.max under mode at C when three-phase shortcircuit, i.e.,
Iact.1>Ik.C.max
Safety factor Krel=1.2~1.3 are introduced, then can be written as in formula
Iact.1=KrelIk.C.max
When short-circuit after adjusting protection scope, since short circuit current is less than starting current, protect by akinesia, thus
As it can be seen that selectively transient current fast tripping protection can not protect the overall length of this route, auxiliary protection application can only be used as.
Fig. 6 is a kind of signal of the emulation experiment method for relay protection shown according to another exemplary embodiment
Figure.Fig. 6 illustratively illustrate to disclose through the invention in the emulation experiment method for relay protection carry out in limited time
Current quick (II section of electric current) test:
Time limit current quick break protection can cut off the failure other than this route transient current fast tripping protection range, while also can
As the standby of transient current fast tripping protection, that is, II section of current protection.Time limit current quick break protection should be under any circumstance
The overall length of this route can be protected, and there is enough sensitivity.Secondly have under the premise of meeting above-mentioned requirements the smallest
Operation time limit.
Due to requiring time-limit quick break protection that must protect the overall length of this route, its protection scope must be extended to
In next route, when short circuit occurring at next line outlet, it will be started.For the selectivity of safety action,
The movement of protection must be made with certain delay (i.e. time limit).It is all to consider first as usual to shorten this time limit as far as possible
Its protection scope is set to be no more than the instantaneous fast tripping protection range of next route, and operation time limit is then more instantaneous than next route
Fast tripping protection is higher by a period, and this time stage is indicated with Δ t.
Test method:
Action current adjusting
Instantaneous fast tripping protection (II section of electric current) action current of this section of route should be greater than I section of action current of lower section route,
Generally taking safety factor (also referred to as cooperation coefficient) Krel is 1.1~1.2.
Operation time limit selection
Time-limit quick break protection operation time limit should select than the next instantaneous fast tripping protection of route operation time limit it is one high
Time phase Δ t.For the electromechanical time relay of clock structure, since its error is larger, Δ t should select 0.5~
0.6s, and the static type time relay and Microcomputer Protection for being constituted using digital circuit, since precision is high, Δ t takes 0.2
~0.35s or so.
A fact Example illustrates the process of specified time overcurrent protection (III section of electric current) experiment below:
It is different from current quick-breaking, overcurrent protection typically refers to its starting current by avoiding the one of maximum load current adjusting
The final stage of kind protective device and multisection type current protection.It is started when operating normally, and be occurred in system
The increase of electric current can be reacted on when failure and is acted, it can not only protect the overall length of this route under normal circumstances, and
The overall length of adjacent lines can be protected, to play the role of remote back-up protection.
It is obviously necessary to adjust to be greater than the peak load being likely to occur on the route for the starting current of specified time overcurrent protection
Electric current IL.max.But actually in the setting current for determining protective device, it is necessary to after considering Removal of external faults, protect
The problem of whether protection unit can return.I.e. lower section line short when, short circuit current is by upper section route, the timing of upper section route
Limit overcurrent protective device will start, and require the protection of lower end line first to act excision failure according to selectivity, then upper section
Original position should be returned to since electric current is reduced immediately by definiting time-lag overcurrent protective device.
After Removal of external faults, the electric current for flowing through this section of route is load current still in continuing to run.But it must
Must be it is considered that voltage reduce when due to short circuit, the motor of connect load is braked on lower section bus, and failure removal voltage is extensive
When multiple, motor will have a self-starting process, and starting current is greater than electric current when normal operation, therefore introduces one and open certainly
Dynamic COEFFICIENT K Ms the ratio between maximum load current LL.max come maximum current IMs.max when indicating self-starting and when operating normally, i.e.,
IMs.max=KMsLL.max
Test method:
Action current adjusting
Specified time overcurrent protection allows for returning immediately under the action of self-starting maximum current.Therefore protective device is returned
The stream Ire that wires back should be greater than IMs.max, and introducing safety factor Krel then has
Ire=KrelIMs.max=KrelKMsLL.max
Kre is the drop-off to pick-up radio of protective device relay, then the starting current of protective device is
Iact=Ire/Kre=KrelKMsLL.max/Kre
Operation time limit adjusting
It definites time-lag overcurrent protection operation time limit to adjust by stairstepping, i.e., the operation time limit of any overcurrent protection should all select
The operation time limit for selecting to protect than junior adjacent elements is higher by a Δ t.
It will be appreciated by those skilled in the art that above-mentioned each module can be distributed in device according to the description of embodiment, it can also
Uniquely it is different from one or more devices of the present embodiment with carrying out corresponding change.The module of above-described embodiment can be merged into
One module, can also be further split into multiple submodule.
By the description of above embodiment, those skilled in the art is it can be readily appreciated that example embodiment described herein
It can also be realized in such a way that software is in conjunction with necessary hardware by software realization.Therefore, it discloses according to the present invention
The technical solution of embodiment can be embodied in the form of software products, which can store non-volatile at one
In storage medium (can be CD-ROM, USB flash disk, mobile hard disk etc.) or on network, including some instructions are so that a calculating is set
Standby (can be personal computer, server, mobile terminal or network equipment etc.) executes and discloses embodiment according to the present invention
Method.
By above detailed description, those skilled in the art it can be readily appreciated that disclose the base of embodiment according to the present invention
It is had one or more of the following advantages in the Relay Protection Experiment System of emulation technology.
The Relay Protection Experiment System based on emulation technology in disclosing according to the present invention, passes through upper computer software and insertion
Formula unit simulation electric system, the fault-signal issued under different faults give relay equipment (or PLC replacement), then relay equipment
(PLC) sending action command feeds back to virtual power grid progress switch cutoff, each electrical quantitative change of whole process after collecting signal
Change curve and is presented in host computer interface.The different types of failure of power circuit, different protection plans can be simulated on the platform
Slightly, protect the protection of equipment dynamic etc., for carrying out the training of system to service personnel, try the clear relay equipment of service personnel respectively
Test the principle, purpose and normal O&M etc. of project.And practical relay protection devices can be more served as with PLC, maintenance and maintenance people
Member is programmed according to theoretical knowledge in PLC, reaches the desired effect known it however know its reason, to improve substation equipment maintenance and repair
The technical level of personnel improves maintenance quality of experiments, the more efficiently reliability for ensureing power supply.
The Relay Protection Experiment System based on emulation technology in disclosing according to the present invention, by based on emulation technology after
Electric protection experimental system carries out the training of personnel compared with traditional training, and safer reliable, operating procedure is more completely advised
Model；And compared with Digital Simulation training system, can in intuitive power system relay protection device relay movement, embody
The advantage of HWIL simulation；The expense and training cost that purchase of equipment can be greatlyd save using the training platform simultaneously, are mentioned indirectly
The economic benefit of high electric power enterprise.
Claims (10)
1. a kind of Relay Protection Experiment System based on emulation technology characterized by comprising
Relay protection device, for receiving from extraneous circuit signal, being acted according to information and generating Real-time Feedback letter
Number；
Embedded emulation device generates real not time circuit parameter for receiving the feedback information from the relay protection device；
PC control device exists for establishing the mathematical model of relay protection device, and by the real not time circuit parameter display
In the mathematical model of the relay protection device.
2. as described in claim 1 based on the Relay Protection Experiment System of emulation technology, which is characterized in that
PC control device, is also used to generate control signal, the control signal for control the relay protection device into
Action is made.
3. as described in claim 1 based on the Relay Protection Experiment System of emulation technology, which is characterized in that
Embedded emulation device, is also used to receive the control signal from the PC control device, and by the control
Signal is converted into circuit signal, is acted with controlling the relay protection device.
4. as described in claim 1 based on the Relay Protection Experiment System of emulation technology, which is characterized in that the relay protection
Equipment and the embedded emulation device are by being used for transmission the circuit connection of analog signal.
5. as described in claim 1 based on the Relay Protection Experiment System of emulation technology, which is characterized in that described embedded imitative
True device is linked with the PC control device by being used for transmission the communication link of digital signal.
6. as described in claim 1 based on the Relay Protection Experiment System of emulation technology, which is characterized in that relay protection device
Include:
Signal element is received, for receiving from the extraneous circuit signal, the circuit signal includes analog signal, with number
Word signal；And
Motor unit, for Real-time Feedback signal to be acted and generated according to the circuit signal, the feedback signal is electricity
Signal.
7. as described in claim 1 based on the Relay Protection Experiment System of emulation technology, which is characterized in that embedded emulation dress
It sets and includes:
Model of power transmission system module, for building multiple model of power transmission system, the model of power transmission system is constructed by VS2013；
Signal conversion module, for convert analog signals into digital signal and or convert digital signals into analog signal.
8. as described in claim 1 based on the Relay Protection Experiment System of emulation technology, which is characterized in that PC control mould
Block includes:
Relay model module, for constructing the relay model；
Three-dimensional display module, for showing the real not time circuit ginseng on the relay model by way of threedimensional model
Number.
9. as claimed in claim 2 based on the Relay Protection Experiment System of emulation technology, which is characterized in that PC control mould
Block further include:
Signaling module is controlled, generates control signal for receiving user instructions, the control signal is protected for controlling the relay
Shield equipment is acted.
10. as claimed in claim 9 based on the Relay Protection Experiment System of emulation technology, which is characterized in that the control letter
Number module includes:
Model emulation module, for showing the mathematical model of the relay protection device, in the mathematics of the relay protection device
The control signal that the user generates is received on model.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111369874A (en) * | 2020-04-08 | 2020-07-03 | 安徽理工大学 | Line protection experiment platform based on model design |
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