CN106781929A - A kind of power distribution network relay protection training set and method - Google Patents
A kind of power distribution network relay protection training set and method Download PDFInfo
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Abstract
The present invention provides a kind of power distribution network relay protection training set; the software emulation device being connected including the power distribution network simulated and with power distribution network; the current setting and operation time limit of the actuating of relay when student calculates the power distribution network various short troubles of generation respectively according to distribution net topology; after failure simulation device makes power distribution network that a certain short trouble to occur; student is by corresponding current setting and operation time limit input protector; whether the current setting and operation time limit calculated with checking are correct, and the present invention also provides a kind of power distribution network relay protection Training Methodology.The present invention makes student skillfully grasp the current setting and the computational methods of operation time limit of different faults type and abort situation, improves the professional skill of relay protection practitioner, and ensure the accuracy and reliability of power distribution network relay protection.
Description
Technical field
The present invention relates to a kind of power distribution network relay protection training set and method.
Background technology
Power distribution network directly takes on the responsibility to customer power supply as last link of electrical energy transportation, its safe operation
Level directly affects power supply quality, and relay protection is one of power distribution network security perimeter important composition.At present, power distribution network relay protection
The setting method that setting valve is mainly the combination of employing mode in disconnection mode is calculated or technical staff is empirically true
Fixed.When some particular forms occurs in system, the definite value that empirical data or off-line setting calculation are obtained is likely difficult to meet selection
The requirement of property or sensitivity.Accordingly, it would be desirable to be carried out to the matching relationship under failure situations between the action behavior of protection and protection
Analogue simulation, to ensure correctness and reliability of the definite value under the various methods of operation.Additionally, connecing with distributed power source
Enter, distribution system is no longer simple single supply network, the direction of tide in system can be in theory arbitrary, and this certainly will be wanted
Influence the sensitivity and selectivity of distribution protection.Therefore, the development of power distribution network relay protection scheme system is also beneficial to dividing
Relay protection setting after cloth plant-grid connection power distribution network, the development to promoting distributed power source also has highly important meaning
Justice.
Relay protection setting needs professional to set in current power distribution network, the adaptive setting process of relay protection also compared with
It is complexity, causes relay protection practitioner's workload big, inefficient, it is therefore desirable to go out more tools by analogue system training
There is the practitioner of professional skill high, and most of existing analogue system is directed to the high-voltage electric power system of 110kV and the above
And transformer station, compared with power distribution network, the two is deposited high-voltage electric power system at aspects such as network structure, parameter composition and setting modes
In different, the Protection simulation software of high-voltage electric power system is not particularly suited for power distribution network, develops a set of suitable for distribution
The relay protection training system of net especially medium voltage distribution network, for the professional and systematicness for promoting power distribution network relay protection
Development has great significance and is worth.
The content of the invention
The purpose of the present invention is directed to the deficiencies in the prior art, proposes a kind of power distribution network relay protection training set and side
Method, makes student more understand distribution net work structure, and the relay protection under different faults type and abort situation can be adjusted
Value is accurate to be set, and has both improved the professional skill of relay protection practitioner, can guarantee that again power distribution network relay protection accuracy and
Reliability.
The present invention is achieved through the following technical solutions：
A kind of power distribution network relay protection training set, including the power distribution network simulated and the software emulation dress being connected with power distribution network
Put, power distribution network is connected to the protection device of control relay action, is arranged in power distribution network and uses including relay and relay
The mutual inductance being connected with protection device in the failure simulation device for making the power distribution network various short troubles of generation and in being arranged on power distribution network
Device, software emulation device is used to build distribution net topology, and it is various short that student calculates power distribution network generation respectively according to distribution net topology
The current setting and operation time limit of the actuating of relay during failure of road, failure simulation device make power distribution network that a certain short trouble to occur
Afterwards, student will correspond to the current setting and operation time limit input protector of the short trouble type and abort situation, protect
The power distribution network electric current that protection unit obtains transformer compares with current setting, when electric current be more than current setting when, control after
Electrical equipment is acted, and relay actuation time is compared with operation time limit, to verify the current setting for calculating and move
Whether correct make the time limit.
Further, the software emulation device includes input module, is connected with input module respectively composition module, the
One computing module, formula storehouse and authentication module, formula storehouse are connected with the first computing module, and composition module is used for according to input module
The wiring requirement of input and the parameter of each element build distribution net topology, and formula storehouse is corresponding short for providing various short troubles
Various tuning rules that road Current calculation formula, various protection seting principles and each protection seting principle include, the first meter
Calculating module is used for the value of each variable of formula according to calculation of short-circuit current formula and the input module imparting read from formula storehouse
Power distribution network short circuit current is calculated, and is adjusted rule according to short circuit current and by the one of which that input module is selected from formula storehouse
Then calculating current setting valve and operation time limit, set failure on distribution net topology, and student is by current setting and operation time limit
The current setting and operation time limit are input into authentication module by input module, to verify current setting and the action of calculating
Whether the time limit is correct.
Further, the software emulation device also includes the second calculating mould being connected with composition module, formula storehouse respectively
Block, the judge module being connected with first, second computing module respectively and the form being connected with judge module and authentication module respectively
Generation module, the second computing module be used for according to from composition module read power distribution network topology information and from formula storehouse read it is short
Road Current calculation formula calculates power distribution network short circuit current automatically, and calculates reasonable model according to short circuit current and various tuning rules
Enclose, the upper lower limit value of zone of reasonableness is respectively the maximum of the current setting and operation time limit determined according to various tuning rules
And minimum value, judge module judge the first computing module calculate current setting and operation time limit whether in the second computing module
In the zone of reasonableness of calculating, if so, then current setting and operation time limit are transmitted to report generation module, report generation module
Adjusted form for generating, have in form of adjusting different faults type and the current setting corresponding to different faults position and
Operation time limit.
Further, the wiring requires to include number transformer, bus quantity, branch road quantity, relay quantity and bears
Quantity is carried, the parameter of each element includes source point information vector, relay status vector, section with substation bus bar as source point
Line length l, circuit resistance per unit length R between point1, circuit unit length reactance X1, high voltage side of transformer rated voltage UN, become
Depressor rated capacity SN, transformer short-circuit loss Δ Pk, transformer short-circuit voltage percentage Uk%.
Further, the protection seting principle includes transformer outlet relay setting principle, bus relay setting
Principle, branch road relay setting principle and load-side relay setting principle, the different choice according to relay present position is not
Same protection seting principle.
Further, the power distribution network also includes the host computer that be connected with the relay, by host computer can control after
Electrical equipment acts to build different distribution net work structures.
Further, the fault simulation module includes being led to from the power distribution network faulty circuit of ground connection, failure electricity
Road includes adjustable resistance, the first switch for controlling the different resistances of adjustable resistance input and is used for positioned at adjustable resistance input side
The second switch of the faulty circuit that is turned on or off, first, second switch is connected with the host computer, and by PC control, it is moved
Make.
The present invention is also achieved through the following technical solutions：
A kind of power distribution network relay protection Training Methodology, comprises the following steps：
A, distribution net topology is built in power distribution network software emulation device according to wiring requirement and the parameter of each element；
B, according to distribution net topology, the parameter of each element, in the calculation of short-circuit current formula provided for software emulation device
Variable assignments, to obtain the short circuit current of each branch road of power distribution network, wherein, the calculation of short-circuit current that software emulation device is provided is public
Formula includes calculating the formula of each branch road load current of power distribution network, calculates the formula of fault branch fault current under different faults type
With the formula for calculating short circuit current, each branch road load current calculated for power flow algorithm using preceding pushing back, and fault type includes
Three phase short circuit fault or phase fault, the short circuit current of fault branch is the load current and fault current of fault branch
Sum, the short circuit current of remaining branch road is equal to the load current of the branch road；
C, according to short circuit current and the position of distribution net topology repeat circuit, select a certain kind in corresponding setting principle
Tuning rule determines current setting and operation time limit, and software emulation device judges whether current setting and operation time limit are closing
In the range of reason, if rationally, software emulation device generates form of adjusting, there are different faults type and different faults in form of adjusting
Current setting and operation time limit corresponding to position, and enter step D, otherwise return to step B；
D, pair current setting for determining and operation time limit verify that selection is verified in software emulation device,
Into step E, selection is verified in the power distribution network of the simulation corresponding to distribution net topology, into step F；
E, in distribution net topology failure is set, is selected in form of adjusting according to fault type and abort situation corresponding
Current setting and operation time limit, and the current setting and operation time limit are input into authentication module, verify that the electric current for calculating is whole
Whether definite value and operation time limit are correct；
F, simulation power distribution network in failure is set, according to fault type and abort situation selected in form of adjusting correspondence
Current setting and operation time limit, and to simulation power distribution network in protection device be input into the current setting and operation time limit,
Verify whether the current setting and operation time limit of calculating are correct.
Further, in the step A, the wiring require to include number transformer, bus quantity, branch road quantity, after
Electrical equipment quantity and load number, the parameter of each element include that substation bus bar is source point information vector, the relay of source point
Line length l, circuit resistance per unit length R between state vector, node1, circuit unit length reactance X1, high voltage side of transformer volume
Determine voltage UN, transformer rated capacity SN, transformer short-circuit loss Δ Pk, transformer short-circuit voltage percentage Uk%.
Further, the step C is comprised the following steps：
C1, the setting principle according to the difference of relay present position be divided into transformer outlet relay setting principle,
Bus relay setting principle, branch road relay setting principle and load-side relay setting principle, each setting principle include
Various different tuning rules, the different choice according to relay present position to one of which tuning rule, with reference to step B institutes
The short circuit current for obtaining, determines current setting and operation time limit；
Be compared for the current setting and operation time limit and zone of reasonableness of determination by C2, software emulation device, reasonable model
The upper lower limit value for enclosing is respectively the maximum and minimum value of the current setting and operation time limit determined according to various tuning rules；
C3, when it is determined that current setting and operation time limit in the reasonable scope when, the generation of software emulation device is adjusted report
Table.
The present invention has the advantages that：
1st, student using software emulation device calculate under different short troubles and abort situation corresponding current setting and
Operation time limit, recycles failure simulation device to simulate short trouble in the power distribution network of simulation, by the short trouble type and event
In the corresponding current setting input protector in barrier position, comparing of the protection device according to power distribution network electric current and current setting
As a result, control relay action and feddback relay device actuation time, with the calculating of verificating current setting valve and operation time limit whether
Correctly, student is skillfully grasped the current setting and the computational methods of operation time limit of different short troubles and abort situation, carry
The professional skill of relay protection practitioner high, and ensure the accuracy and reliability of power distribution network relay protection.
2nd, software emulation device can as requested draw different power distribution network topological structures, and student calculates current setting
After operation time limit, directly can be verified on software emulation device, and it is various without being simulated by adjusting hardware configuration
Distribution net work structure, can realize training purpose, and can time-consuming and training cost.
3rd, for simulation power distribution network, can be by the action of PC control power distribution network repeat circuit, quickly and easily structure
Several different distribution net work structures are built, student is intuitively observed and is familiar with various typical distribution web frames, improve relay protection
The professional qualities of practitioner.
Brief description of the drawings
The present invention is described in further details below in conjunction with the accompanying drawings.
Fig. 1 is the theory diagram of power distribution network relay protection training set of the present invention.
Fig. 2 is the circuit diagram of power distribution network of the present invention.
Fig. 3 is the circuit diagram of failure simulation device of the present invention.
Fig. 4 is the flow chart of power distribution network relay protection Training Methodology of the present invention.
Specific embodiment
As shown in figure 1, the software that power distribution network relay protection training set includes the power distribution network 1 of simulation and is connected with power distribution network
Simulator 2, power distribution network 1 include relay 11 and relay 11 be connected to the action of control relay 11 protection device 12,
It is arranged in power distribution network 1 for making power distribution network 1 failure simulation device 13 of various short troubles occur, be arranged in power distribution network 1
The transformer 14 being connected with protection device 12 and the host computer 15 being connected with relay 11, software emulation device 2 can build matches somebody with somebody
Power network topology, the electric current of the actuating of relay is whole when student calculates the power distribution network various short troubles of generation respectively according to distribution net topology
Definite value and operation time limit, after failure simulation device 13 makes the power distribution network 1 of simulation that a certain short trouble to occur, student will be corresponding to this
The current setting and operation time limit input protector 12 of short trouble type and abort situation, protection device 12 is by transformer
The electric current of 14 power distribution networks 1 for obtaining compares with current setting, when the electric current of power distribution network 1 is more than current setting, protection dress
Put the corresponding relay 11 of 12 control relays to act, and the actuation time of relay 11 and operation time limit are compared, to test
Whether the current setting that calculates of card and operation time limit correct, wherein, short trouble type include three phase short circuit fault and
Phase fault.
The calculating of composition module 22, first that software emulation device 2 includes input module 21, is connected with input module 21 respectively
Module 23, formula storehouse 24 and authentication module 28, the second computing module 25 being connected with composition module 22 and formula storehouse 24 respectively, point
The judge module 26 that is not connected with the first computing module 23, the second computing module 25 and respectively with judge module 26 and authentication module
The report generation module 27 of 28 connections, formula storehouse 24 is connected with the first computing module 23.
Composition module 22 is used to build distribution according to the wiring requirement of the input of input module input 21 and the parameter of each element
Net topology, wherein, wiring requires to include number transformer, bus quantity, branch road quantity, relay quantity and load number, respectively
The parameter of element includes the source point information vector with substation bus bar as source point, line length between relay status vector, node
L, circuit resistance per unit length R1, circuit unit length reactance X1, high voltage side of transformer rated voltage UN, transformer rated capacity
SN, transformer short-circuit loss Δ Pk, transformer short-circuit voltage percentage UkThe resistance value R=R of circuit between %, node1L, reactance value
X=X1L, the resistance value of transformerReactance value
Formula storehouse is used to provide three phase short circuit fault and the corresponding calculation of short-circuit current formula of two-phase short-circuit fault, Duo Zhongbao
Various tuning rules that shield setting principle and each protection seting principle include.
Wherein, calculation of short-circuit current formula includes calculating the formula of each branch road load current of distribution net topology, calculates different
The formula of fault branch fault current and the formula of short circuit current is calculated under fault type, each branch road load current is using preceding pushing back
Calculated for power flow algorithm, the formula of fault current includes the fault current formula and phase fault of three phase short circuit fault
Fault current formula, the short circuit current of fault branch is the load current and fault current sum, remaining branch road of fault branch
Short circuit current be equal to the branch road load current；
Protection seting principle can be divided into transformer outlet relay setting principle, mother according to the difference of relay present position
Line relay setting principle, branch road relay setting principle and load-side relay setting principle, each protection seting principle
Including various tuning rules, respectively：
Transformer outlet relay setting principle:
(1) excessively stream I sections：
A, by escape this line end maximum three short circuit current tuning rule adjust：
B, adjusted by the tuning rule of no more than 5 times of voltage device low-voltage rated capacity of our station：Its
In, SnIt is main transformer rated capacity, UnIt is main transformer rated voltage；
C, sensitivity check is carried out not less than 1 during this line outlet two-phase short-circuit fault by under minimum operational mode, if not
Meet sensitivity, then adjusted by the tuning rule with next stage circuit Ι sections of cooperation：IDZΙ=Km*Kfz*IDZ1, wherein, sensitivity school
Testing formula is：
D, operation time limit T：If carrying out current calibration, T=0s according to the tuning rule described in a；If according to b or c
Described in tuning rule carry out current calibration, then T=0.3s；
(2) excessively stream II sections：
A, by escape this line end maximum three short circuit current tuning rule adjust：
B, the tuning rule coordinated by I/II sections protected with subordinate are adjusted：
IDZΙΙ=Km*Kfz*IDZ1/IDZΙΙ=Km*Kfz*IDZ2；
C, carry out sensitivity check not less than 1.5 during this line end two-phase short-circuit fault by under minimum operational mode：
D, operation time limit T：With upper and lower level protection time match：
T≤T '-Δ T, T >=T "+Δ T；
(3) excessively stream III sections：
A, adjusted by the tuning rule for escaping peak load circuit：IDZΙΙΙ=KK*K*If/Kfh；
B and subordinate protect III sections of cooperation：IDZΙΙΙ=Km*Kfz*IDZ3；
C, carry out sensitivity check not less than 1.5 during this line end two-phase short-circuit fault by under minimum operational mode：
D, operation time limit T：With upper and lower level protection time match：
T≤T '-Δ T, T >=T "+Δ T.
Bus relay setting principle：
(1) excessively stream I sections：
A, by escape this line end maximum three short circuit current tuning rule adjust：
If b, the setting current obtained according to the tuning rule described in a are whole less than 1.2 times of next stage branch switch maximums
Definite value, takes 1.2 times of next stage branch switch maximum setting valves；
C, operation time limit T：T=0.15s, with outlet switch I sections of protection time match；
(2) excessively stream II sections：
A, have distribution transforming between with subordinate relay if by the rule of adjusting for escaping distribution low-voltage side maximum three short circuit current
Then adjust：
B, the tuning rule coordinated by II sections protected with subordinate are adjusted：
IDZΙΙ=Km*Kfz*IDZ2；
C, carry out sensitivity check not less than 1.5 during this line end two-phase short-circuit fault by under minimum operational mode：
D, operation time limit T：With upper and lower level protection time match：
T≤T '-Δ T, T >=T "+Δ T；
(3) excessively stream III sections：
A, adjusted by the tuning rule for escaping peak load circuit：IDZΙΙΙ=KK*K*If/Kfh；
B, operation time limit T：With upper and lower level protection time match：
T≤T '-Δ T, T >=T "+Δ T.
Branch road relay setting principle
(1) excessively stream I sections：
A, by escape this line end maximum three short circuit current tuning rule adjust：
B, operation time limit T：T=0s；
(2) excessively stream II sections：
A, by escape distribution low-voltage side maximum three short circuit current tuning rule adjust：
B, the tuning rule coordinated by I sections protected with subordinate are adjusted：
IDZΙΙ=KK*IDZ1；
C, carry out sensitivity check not less than 1.5 during this line end two-phase short-circuit fault by under minimum operational mode：
D, operation time limit T：With upper and lower level protection time match：
T≤T '-Δ T, T >=T "+Δ T；
(3) excessively stream III sections：
A, adjusted by the tuning rule for escaping peak load circuit：IDZΙΙΙ=KK*K*If/Kfh；
B, operation time limit T：With upper and lower level protection time match：
T≤T '-Δ T, T >=T "+Δ T.
Load-side relay setting principle
(1) excessively stream I sections：
A, flow through the whole of on high-tension side short circuit current by when escaping step down side three-phase shortcircuit under maximum operational mode
Set pattern is then adjusted：
B, operation time limit T：If being followed by 1 distribution transforming, T=0s；If being followed by 2 and above distribution transforming, T=0.2s；
(2) excessively stream II sections：
A, adjusted by the tuning rule for escaping maximum load current：IDZΙΙ=KK*K*If/Kfh；
B, operation time limit T：If being followed by 1 distribution transforming, T=0.3s, if being followed by 2 and above distribution transforming, T=0.5s；
Wherein, above-mentioned various middle alphabetical implication is as shown in table 1：
The setting principle letter character implication table of comparisons of table 1
First computing module 23 is used for according to the calculation of short-circuit current formula and input module 21 read from formula storehouse 24
The value of each variable of formula of imparting calculates power distribution network short circuit current, and according to short circuit current and from student by input module 21 from
The one of which tuning rule calculating current setting valve and operation time limit selected in formula storehouse 24, the second computing module 25 are used for root
Calculated automatically according to the power distribution network topology information read from composition module 22 and the calculation of short-circuit current formula read from formula storehouse 24
Power distribution network short circuit current, and zone of reasonableness, the upper lower limit value point of zone of reasonableness are calculated according to short circuit current and various tuning rules
It is not the maximum and minimum value of the current setting and operation time limit determined according to various tuning rules, judge module 26 judges
First computing module 23 calculate current setting and operation time limit whether the second computing module 25 calculate zone of reasonableness, if
It is then to transmit to report generation module 27 current setting and operation time limit, report generation module 27 is adjusted report for generation
Table, with the current setting and operation time limit corresponding to different short trouble types and different faults position in form of adjusting,
Short trouble is set on the distribution net topology that composition module 22 builds by input module 21, student is according to the short trouble class
Type and abort situation, select corresponding current setting and operation time limit from form of adjusting, by input module 21 be input into
Authentication module 28, authentication module 28 makes distribution net topology run emulation, and whether corresponding relay moves in observation distribution net topology
Make and its actuation time, it is whether correct with the current setting and operation time limit of verifying student's calculating.
As shown in Fig. 2 in the present embodiment, power distribution network 11 includes being realized by relay 910 first via of connection hand in hand
The protection device (being not drawn into figure) and protection device of the relay connection in line and the second route and first, second route connect
The transformer (being not drawn into figure) that connects and load, the first route include power supply V1, transformer T1, the first bus L1, female from first
Relay 111 on first line that line L1 draws, the connecting line that is serially connected between power supply V1 and transformer T1, it is serially connected in transformation
The relay 911 on connecting line between device T1 and the first bus L1, the relay 912, relay being serially connected in first line
913rd, relay 914, relay 910 is serially connected in first line, and the circuit between relay 912, relay 913 forms first
Branch road L2, the circuit between relay 913, relay 914 forms the second branch road L3, between relay 914, relay 910
The branch road L4 of circuit stroke the 3rd, draws from tie point L2, the second branch road L3 and the 3rd branch road L4 connect load, the second route respectively
Including power supply V2, transformer T2, the second bus L5, from the second bus L5 draw the second circuit, be serially connected in power supply V2 and transformation
Relay 121 on connecting line between device T2, the relay on the connecting line being serially connected between transformer T2 and the second bus L5
Device 921, the relay 922 being serially connected on the second circuit, the triple bus-bar L6 of the connection of relay 923 and second, respectively from
Triple bus-bar L6 draw tertiary circuit and the 7th branch road L10, be serially connected on tertiary circuit relay 924, relay 925,
Relay on the relay 926 that is serially connected on the 4th circuit, the connecting line being arranged between the first bus L1 and the second bus L5
Device 900, the circuit between relay 922, relay 923 forms the 4th branch road L7, the line between relay 924, relay 925
Road forms the 5th branch road L8, and the circuit between relay 910, relay 925 forms the 6th branch road L9, respectively from the second bus
L5, triple bus-bar L6, the 7th branch road L10 draw and connect load, and power supply V1 is identical with power supply V2 output voltages, transformer T1 and transformation
Device T2 specifications are identical, and tie point L2, the second branch road L3, the 3rd branch road L4, the 7th branch road L10 are 1km trolley lines, the 4th
Road L7 is that 0.5km cables add 2km trolley lines, and the 5th branch road L8 is 2km trolley lines.
As shown in figure 3, failure simulation device includes being led to from power distribution network 1 faulty circuit of ground connection, faulty circuit includes
Adjustable resistance 53, for control adjustable resistance 53 put into different resistances first switch 56 and positioned at the input side of adjustable resistance 53 use
In the second switch 57 of the faulty circuit that is turned on or off, first switch 56 and second switch 57 are connected with host computer 15, by upper
Position machine 15 control its action, first switch 56 include switch K10, K11, K12 and K13, second switch 57 include switch K4, K5 and
K6。
As shown in figure 4, power distribution network relay protection Training Methodology, comprises the following steps：
A, distribution net topology is built in power distribution network software emulation device according to wiring requirement and the parameter of each element, its
In, wiring requires to include number transformer, bus quantity, branch road quantity, relay quantity and load number, each element
Parameter includes source point information vector of the substation bus bar for source point, line length l, circuit list between relay status vector, node
Bit length resistance R1, circuit unit length reactance X1, high voltage side of transformer rated voltage UN, transformer rated capacity SN, transformer
Short circuit loss Δ Pk, transformer short-circuit voltage percentage Uk%；
B, according to distribution net topology, the parameter of each element, the variable assignments in the formula provided for software emulation device, with
The short circuit current of each branch road of power distribution network is obtained, wherein, the formula that software emulation device is provided includes that calculating each branch road of power distribution network bears
The formula of charged current, the formula and the formula of calculating short circuit current that calculate fault branch fault current under different faults type, respectively
Branch road load current is calculated for power flow algorithm using preceding pushing back, and fault type includes three phase short circuit fault or phase fault
Failure, the short circuit current of fault branch is the load current and fault current sum, the short circuit current of remaining branch road of fault branch
Equal to the load current of the branch road；
C, according to short circuit current and the position of distribution net topology repeat circuit, select a certain kind in corresponding setting principle
Tuning rule determines current setting and operation time limit, and software emulation device judges whether current setting and operation time limit are closing
In the range of reason, if rationally, software emulation device generates form of adjusting, there are different faults type and different faults in form of adjusting
Current setting and operation time limit corresponding to position, and enter step D, otherwise return to step B, specially：
C1, setting principle are divided into transformer outlet relay setting principle, bus according to the difference of relay present position
Relay setting principle, branch road relay setting principle and load-side relay setting principle, each setting principle include various
Different tuning rules, the different choice according to relay present position to one of which tuning rule, with reference to obtained by step B
Short circuit current, determines current setting and operation time limit；
Be compared for the current setting and operation time limit and zone of reasonableness of determination by C2, software emulation device, reasonable model
The upper lower limit value for enclosing is respectively the maximum and minimum value of the current setting and operation time limit determined according to various tuning rules；
C3, when it is determined that current setting and operation time limit in the reasonable scope when, the generation of software emulation device is adjusted report
Table；
D, pair current setting for determining and operation time limit verify that selection is verified in software emulation device,
Into step E, selection is verified in the power distribution network of the simulation corresponding to distribution net topology, into step F；
E, in distribution net topology failure is set, is selected in form of adjusting according to fault type and abort situation corresponding
Current setting and operation time limit, and the current setting and operation time limit are input into authentication module, verify that the electric current for calculating is whole
Whether definite value and operation time limit are correct；
F, simulation power distribution network in failure is set, according to fault type and abort situation selected in form of adjusting correspondence
Current setting and operation time limit, and to simulation power distribution network in relay protection be input into the current setting and action
In the time limit, verify whether the current setting and operation time limit of calculating are correct.
The above, only presently preferred embodiments of the present invention, therefore the scope of present invention implementation can not be limited with this, i.e.,
The equivalence changes made according to scope of the present invention patent and description and modification, all should still belong to what patent of the present invention covered
In the range of.
Claims (10)
1. a kind of power distribution network relay protection training set, it is characterised in that：It is connected including the power distribution network simulated and with power distribution network
Software emulation device, power distribution network includes that relay and relay are connected to the protection device of control relay action, are arranged on
The failure simulation device that is used to making power distribution network that various short troubles to occur in power distribution network and it is arranged in power distribution network and protection device
The transformer of connection, software emulation device is used to build distribution net topology, and student calculates power distribution network respectively according to distribution net topology
There is the current setting and operation time limit of actuating of relay during various short troubles, failure simulation device makes power distribution network that certain to occur
After one short trouble, current setting and the operation time limit input that student will correspond to the short trouble type and abort situation are protected
Protection unit, the power distribution network electric current that protection device obtains transformer compares with current setting, when electric current is more than current setting
When, control relay action, and relay actuation time is compared with operation time limit, it is whole to verify the electric current for calculating
Whether definite value and operation time limit are correct.
2. a kind of power distribution network relay protection training set according to claim 1, it is characterised in that：The software emulation dress
Composition module, the first computing module, formula storehouse and the authentication module being connected with input module including input module, respectively are put, it is public
Formula storehouse is connected with the first computing module, and composition module is used for the parameter structure of the wiring requirement and each element being input into according to input module
Distribution net topology is built, formula storehouse is used to provide the corresponding calculation of short-circuit current formula of various short troubles, various protection setings original
The various tuning rules for then including with each protection seting principle, the first computing module is used for according to the reading from formula storehouse
The value of each variable of formula that calculation of short-circuit current formula and input module are assigned calculates power distribution network short circuit current, and according to short-circuit electricity
Stream and the one of which tuning rule calculating current setting valve and operation time limit that are selected from formula storehouse by input module, are being matched somebody with somebody
Failure is set on power network topology, and current setting and operation time limit are input into the electric current by student by input module to authentication module
Setting valve and operation time limit, it is whether correct with the current setting and operation time limit of verifying calculating.
3. a kind of power distribution network relay protection training set according to claim 2, it is characterised in that：The software emulation dress
Putting also includes the second computing module being connected with composition module, formula storehouse respectively, is respectively connected with first, second computing module
Judge module and the report generation module being connected with judge module and authentication module respectively, the second computing module are used for basis from structure
The power distribution network topology information and the calculation of short-circuit current formula from the reading of formula storehouse that module reads calculate power distribution network short circuit automatically
Electric current, and zone of reasonableness is calculated according to short circuit current and various tuning rules, the upper lower limit value of zone of reasonableness is respectively according to each
The current setting of tuning rule determination and the maximum and minimum value of operation time limit are planted, judge module judges the first computing module
The current setting and operation time limit of calculating whether the second computing module calculate zone of reasonableness in, if so, then that electric current is whole
Definite value and operation time limit are transmitted to report generation module, and report generation module is adjusted form for generation, is had in form of adjusting
Current setting and operation time limit corresponding to different faults type and different faults position.
4. a kind of power distribution network relay protection training set according to Claims 2 or 3, it is characterised in that：The wiring will
Ask including number transformer, bus quantity, branch road quantity, relay quantity and load number, the parameter of each element includes
Line length l, circuit unit length between source point information vector, relay status vector, the node with substation bus bar as source point
Resistance R1, circuit unit length reactance X1, high voltage side of transformer rated voltage UN, transformer rated capacity SN, transformer short-circuit damage
Consumption Δ Pk, transformer short-circuit voltage percentage Uk%.
5. a kind of power distribution network relay protection training set according to Claims 2 or 3, it is characterised in that：The protection is whole
Principle is determined including transformer outlet relay setting principle, bus relay setting principle, branch road relay setting principle and is born
Side relay setting principle is carried, the different protection seting principle of the different choice according to relay present position.
6. a kind of power distribution network relay protection training set according to claim 1 or 2 or 3, it is characterised in that：The distribution
Net also includes the host computer being connected with the relay, can control the actuating of relay to build different power distribution networks by host computer
Structure.
7. a kind of power distribution network relay protection training set according to claim 6, it is characterised in that：The fault simulation mould
Block includes being led to from the power distribution network faulty circuit of ground connection, and faulty circuit is including adjustable resistance, for controlling adjustable resistance
Put into the first switch of different resistances and be used for the second switch of faulty circuit of being turned on or off positioned at adjustable resistance input side, the
First, second switch is connected with the host computer, by its action of PC control.
8. a kind of power distribution network relay protection Training Methodology, it is characterised in that：Comprise the following steps：
A, distribution net topology is built in power distribution network software emulation device according to wiring requirement and the parameter of each element；
B, according to distribution net topology, the parameter of each element, the change in the calculation of short-circuit current formula provided for software emulation device
Amount assignment, to obtain the short circuit current of each branch road of power distribution network, wherein, the calculation of short-circuit current formula bag that software emulation device is provided
Include the formula for calculating each branch road load current of power distribution network, the formula and meter for calculating fault branch fault current under different faults type
The formula of short circuit current is calculated, each branch road load current is calculated for power flow algorithm using preceding pushing back, and fault type includes three-phase
Short trouble or phase fault, the short circuit current of fault branch for fault branch load current and fault current it
With the short circuit current of remaining branch road is equal to the load current of the branch road；
C, according to short circuit current and the position of distribution net topology repeat circuit, select a certain kind in corresponding setting principle to adjust
Rule determines current setting and operation time limit, and whether software emulation device judges current setting and operation time limit in reasonable model
In enclosing, if rationally, software emulation device generates form of adjusting, there is different faults type and different faults position in form of adjusting
Corresponding current setting and operation time limit, and enter step D, otherwise return to step B；
D, pair current setting for determining and operation time limit verify that selection is verified in software emulation device, enter
Step E, selection is verified in the power distribution network of the simulation corresponding to distribution net topology, into step F；
E, in distribution net topology failure is set, corresponding electric current is selected in form of adjusting according to fault type and abort situation
Setting valve and operation time limit, and the current setting and operation time limit are input into authentication module, verify the current setting for calculating
And whether operation time limit is correct；
F, simulation power distribution network in failure is set, corresponding electricity is selected in form of adjusting according to fault type and abort situation
Stream setting valve and operation time limit, and the current setting and operation time limit are input into the protection device in simulation power distribution network, verify
Whether the current setting and operation time limit of calculating are correct.
9. a kind of power distribution network relay protection Training Methodology according to claim 8, it is characterised in that：In the step A, institute
State wiring and require to include number transformer, bus quantity, branch road quantity, relay quantity and load number, each element
Parameter includes source point information vector of the substation bus bar for source point, line length l, circuit list between relay status vector, node
Bit length resistance R1, circuit unit length reactance X1, high voltage side of transformer rated voltage UN, transformer rated capacity SN, transformer
Short circuit loss Δ Pk, transformer short-circuit voltage percentage Uk%.
10. a kind of power distribution network relay protection Training Methodology according to claim 8 or claim 9, it is characterised in that：The step C
Comprise the following steps：
C1, the setting principle are divided into transformer outlet relay setting principle, bus according to the difference of relay present position
Relay setting principle, branch road relay setting principle and load-side relay setting principle, each setting principle include various
Different tuning rules, the different choice according to relay present position to one of which tuning rule, with reference to obtained by step B
Short circuit current, determines current setting and operation time limit；
Be compared for the current setting and operation time limit and zone of reasonableness of determination by C2, software emulation device, zone of reasonableness
Upper lower limit value is respectively the maximum and minimum value of the current setting and operation time limit determined according to various tuning rules；
C3, when it is determined that current setting and operation time limit in the reasonable scope when, the generation of software emulation device is adjusted form.
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