CN105977935B - The method of manual simulating grid protective device zero sequence direction overcurrent protection actuating range - Google Patents
The method of manual simulating grid protective device zero sequence direction overcurrent protection actuating range Download PDFInfo
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- CN105977935B CN105977935B CN201610507381.1A CN201610507381A CN105977935B CN 105977935 B CN105977935 B CN 105977935B CN 201610507381 A CN201610507381 A CN 201610507381A CN 105977935 B CN105977935 B CN 105977935B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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Abstract
The invention discloses a kind of methods of determining zero sequence direction overcurrent protection actuating range, are used for electric network protection device, and this method includes obtaining the direction fineness angle φ of electric network protection device；Set the theoretical actuating range of electric network protection device to+90 ° of+360 ° of k of 90 ° of+360 ° of k ＜ φ ＜ φ of φ; wherein, when electric network protection device is main protection equipment for transformer and its zero sequence direction is directed toward transformer, k=1; otherwise, k=0；When carrying out response debugging to electric network protection device, make short-circuit zero-sequence current 90 ° of+360 ° of k θ of short circuit residual voltage φ in advance respectively1、‑φ‑90°+360°·k+θ2、‑φ+90°+360°·k‑θ3And+90 ° of+360 ° of k+ θ of φ4, when four kinds of responses of electric network protection device are correct, then the zero sequence direction overcurrent protection actuating range of electric network protection device is+90 ° of+360 ° of k of 90 ° of+360 ° of k ＜ φ ＜ φ of φ, wherein θ1、θ2、θ3And θ4Range intervals be (0,90 °).The present invention can be in simulation singlephase earth fault manually, when fineness angle is zero sequence direction fineness angle, the actuating range of the accurate zero sequence direction overcurrent protection for determining electric network protection device.
Description
Technical field
Zero sequence direction current protection technology of the present invention field is acted more particularly to a kind of determining zero sequence direction overcurrent protection
The method of range.
Background technology
When technician and advanced technician's practical operation take an examination, often require that using static test instrument to electric network protection device, such as
The actuating range of the ground connection zero sequence direction overcurrent protection of RCS-978 carries out manual simulation test.As main transformer (such as 220kV)
When single phase ground fault, short-circuit phase voltage reduces and short-circuit phase current increases, and short-circuit phase can also change, and meeting
Generate short-circuit zero-sequence current and short-circuit residual voltage.
And the debugging specification book of electric network protection device is only introduced within the scope of protection act, added faulted phase current should
From the phase polar end of high voltage side current mutual inductor into, nonpolarity is brought out, then seals in the polar end of high-pressure side zero sequence current mutual inductor,
It is brought out from nonpolarity.It is not clear, in simulation singlephase earth fault manually, when fineness angle is zero sequence direction fineness angle,
How the actuating range of the zero sequence direction overcurrent protection of electric network protection device is determined.
Therefore, how to provide a kind of method of the zero sequence direction overcurrent protection actuating range of determining electric network protection device is this
The current problem to be solved of field technology personnel.
Invention content
The object of the present invention is to provide a kind of methods of determining zero sequence direction overcurrent protection actuating range, can be in manual mould
When quasi-single- phase earth fault, when fineness angle is zero sequence direction fineness angle, the accurate zero sequence direction mistake for determining electric network protection device
Flow the actuating range of protection.
In order to solve the above technical problems, the present invention provides a kind of sides of determining zero sequence direction overcurrent protection actuating range
Method, is used for electric network protection device, and this method includes：
Obtain the direction fineness angle φ of the electric network protection device；
By the theoretical actuating range of the electric network protection device be set as -90 ° of+360 ° of+90 ° of k ＜ φ ＜-φ of-φ+
360 ° of k, wherein when the electric network protection device is main protection equipment for transformer and its zero sequence direction is directed toward transformer, k=
1, otherwise, k=0；
When carrying out response debugging to the electric network protection device, make short-circuit zero-sequence current short-circuit zero sequence electricity in advance respectively
- 90 ° of+360 ° of k- θ of pressure-φ1、-φ-90°+360°·k+θ2、-φ+90°+360°·k-θ3And+90 ° of+360 ° of k+ of-φ
θ4, when four kinds of responses of the electric network protection device are correct, then the zero sequence direction overcurrent protection of the electric network protection device
Actuating range is+90 ° of+360 ° of k of -90 ° of+360 ° of k ＜ φ ＜-φ of-φ, wherein θ1、θ2、θ3And θ4Range intervals be
(0,90 °).
Preferably, the electric network protection device is main protection equipment for transformer, and the side of the main transformer protection device
It it is 75 ° to fineness angle φ, then the theoretical actuating range is -165 ° of 15 ° of ＜ φ ＜.
Preferably, the θ1、θ2、θ3And θ4It is 1 °.
Preferably, described when carrying out response debugging to the electric network protection device, make short-circuit zero-sequence current advanced respectively
- 90 ° of+360 ° of k- θ of short-circuit residual voltage-φ1、-φ-90°+360°·k+θ2、-φ+90°+360°·k-θ3And-φ+
90°+360°·k+θ4, when four kinds of electric network protection device responses are correct, then the zero sequence of the electric network protection device
Directional over-current protection actuating range is that the process of+90 ° of+360 ° of k of -90 ° of+360 ° of k ＜ φ ＜-φ of-φ is specially：
First response debugging, the second response debugging, third response debugging are carried out respectively to the main transformer protection device
And the 4th response debugging, wherein：
First response, which is debugged, includes：
State 1：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, the abnormal indicator light on panel to be shown enters state 2 after extinguishing；
The state 2：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 ∠ -164 ° of A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t1S, wherein t1Action more than the main transformer protection device is whole
It fixes time；
The main transformer protection device carries out the first response；
Second response, which is debugged, includes：
State 3：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, enter state 4 after the abnormal indicator light on the display panel extinguishes；
The state 4：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 ∠ -166 ° of A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t2S, wherein t2Action more than the main transformer protection device is whole
It fixes time；
The main transformer protection device carries out the second response；
The third response, which is debugged, includes：
State 5：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, enter state 6 after the abnormal indicator light on the display panel extinguishes；
The state 6：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 14 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t3S, wherein t3Action more than the main transformer protection device is whole
It fixes time；
The main transformer protection device carries out third response；
4th response, which is debugged, includes：
State 7：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, enter state 8 after the abnormal indicator light on the display panel extinguishes；
The state 8：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 16 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t4S, wherein t4Action more than the main transformer protection device is whole
It fixes time；
The main transformer protection device carries out the 4th response；
When first response and third response are to act in zero sequence direction overcurrent I the first time limits of section, mother goes out
From scratch, tripping lamp is bright for mouth pressing plate voltage, shows that T01 element movements, actuation time are that the action is adjusted in display device
Time；And second response and the 4th response be when being that protection is failure to actuate, the main transformer protection device
Zero sequence direction overcurrent protection actuating range is -165 ° of 15 ° of ＜ φ ＜.
Preferably, the action setting time is 1.2s.
Preferably, the t1=t2=t3=t4=8s.
Preferably, the main transformer protection device is RCS-978 main transformer protection devices.
Preferably, when the zero sequence direction of the main transformer protection device is directed toward transformer, the main transformer protection
The direction fineness angle φ of device is 255 °, then the theoretical actuating range is 15 ° of 195 ° of ＜ φ ＜.
Preferably, the electric network protection device is supervoltage line protective device RCS-901 or supertension line is protected
Device RCS-902 or supervoltage line protective device RCS-931.
The present invention provides a kind of methods of determining zero sequence direction overcurrent protection actuating range, are used for electric network protection device,
This method determines the theoretical actuating range of electric network protection device by the direction fineness angle φ of electric network protection device first, then passes through
The theoretical actuating range of electric network protection device determines that short circuit zero-sequence current is advanced when carrying out response debugging to electric network protection device
The angle of short-circuit residual voltage, when the response of electric network protection device is correct, so that it is determined that the zero sequence side of electric network protection device
Be theoretical actuating range to overcurrent protection actuating range, it is seen then that the present invention can in simulation singlephase earth fault manually, when
When fineness angle is zero sequence direction fineness angle, the actuating range of the accurate zero sequence direction overcurrent protection for determining electric network protection device.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of flow of the process of the method for determining zero sequence direction overcurrent protection actuating range provided by the invention
Figure；
Fig. 2 is that theory acts model when a kind of zero sequence direction of main transformer protection device provided by the invention is directed toward transformer
Enclose schematic diagram；
Theory actuating range when Fig. 3 is a kind of zero sequence direction pointing system of main transformer protection device provided by the invention
Schematic diagram；
Fig. 4 is a kind of connection diagram of static test instrument and RCS-978 provided by the invention.
Specific implementation mode
Core of the invention is to provide a kind of method of determining zero sequence direction overcurrent protection actuating range, can be in manual mould
When quasi-single- phase earth fault, when fineness angle is zero sequence direction fineness angle, the accurate zero sequence side for determining main transformer protection device
To the actuating range of overcurrent protection.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Firstly the need of explanation, it is applicable that the present invention provides a kind of method of determining zero sequence direction overcurrent protection actuating range
The vertical connection of RCS-901, RCS-902 when 220kV main transformer zero sequence direction overcurrent protections or circuit single phase ground fault
Zero-sequence voltage injection, is of course also apply to the main transformer zero sequence direction overcurrent protection of other models, while being also applied for RCS-
The test of 978 main transformer medium voltage sides (sides 110kV) zero sequence direction overcurrent protection.
Fig. 1 is please referred to, Fig. 1 is a kind of mistake of the method for determining zero sequence direction overcurrent protection actuating range provided by the invention
The flow chart of journey, this method include：
Step S101：Obtain the direction fineness angle φ of electric network protection device；
Step S102：By the theoretical actuating range of electric network protection device be set as -90 ° of+360 ° of k ＜ φ ＜-φ of-φ+
90 ° of+360 ° of k, wherein when electric network protection device is main protection equipment for transformer and its zero sequence direction is directed toward transformer, k=
1, otherwise, k=0；
It is understood that for electric network protection device, when electric network protection device be main protection equipment for transformer and
When the zero sequence direction of main transformer protection device is directed toward transformer, zero sequence fineness angle is 255 °, when pointing system, zero sequence fineness angle
It is 75 °；The zero sequence fineness angle of electric network protection device (such as RCS-901, RCS-902 pilot zero sequence direction relay) is joined by circuit zero sequence
Number is determined and is adjusted in device.Preferably, electric network protection device is main protection equipment for transformer, and main transformer protection
The direction fineness angle φ of device is 75 °, then theoretical actuating range is -165 ° of 15 ° of ＜ φ ＜.
Preferably, when the zero sequence direction of main transformer protection device is directed toward transformer, main transformer protection device
Direction fineness angle φ be 255 °, then theoretical actuating range is 15 ° of 195 ° of ＜ φ ＜.
It is understood that electric network protection device here can protection equipment for transformer may be super-high voltage based on
Line protection device.The angle of the short-circuit zero-sequence current of static test instrument output short-circuit residual voltage in advance is electric network protection device
Direction fineness angle.
When electric network protection device is main protection equipment for transformer, if the zero sequence direction of main transformer protection device is directed toward
Transformer, then direction fineness angle φ=255 ° of main transformer protection device, at this time k=1 namely main transformer protection device
Theoretical actuating range is 15 ° of 195 ° of ＜ φ ＜, specifically, please refers to Fig. 2, Fig. 2 is that a kind of main transformer provided by the invention is protected
Theory actuating range schematic diagram when the zero sequence direction of protection unit is directed toward transformer；If the zero sequence direction of main transformer protection device
When being directed toward the external system being connect with transformer, direction fineness angle φ=75 ° of main transformer protection device, k=0 at this time,
I.e. the theoretical actuating range of main transformer protection device is -165 ° of 15 ° of ＜ φ ＜, specifically, please refers to Fig. 3, Fig. 3 is the present invention
Theory actuating range schematic diagram when a kind of zero sequence direction pointing system of the main transformer protection device provided.
When electric network protection device is supervoltage line protective device, the direction fineness angle φ of supervoltage line protective device
=72 °, the theoretical actuating range of k=0 namely supervoltage line protective device is -162 ° of 18 ° of ＜ φ ＜ at this time.
Step S103：When carrying out response debugging to electric network protection device, make short-circuit zero-sequence current advanced short-circuit zero respectively
- 90 ° of+360 ° of k- θ of sequence voltage-φ1、-φ-90°+360°·k+θ2、-φ+90°+360°·k-θ3And+90 ° of-φ+
360°·k+θ4, when four kinds of responses of electric network protection device are correct, then the zero sequence direction overcurrent protection of electric network protection device
Actuating range is+90 ° of+360 ° of k of -90 ° of+360 ° of k ＜ φ ＜-φ of-φ, wherein θ1、θ2、θ3And θ4Range intervals be
(0,90 °).
Specifically, θ1、θ2、θ3And θ4Range intervals be (0,2 °).Certainly, θ1、θ2、θ3And θ4It can also be 0 to 90 °
Between other numerical value, the present invention is not particularly limited herein.
Preferably, θ1、θ2、θ3And θ4It is 1 °.
Below to we by taking the zero sequence direction of main transformer protection device is directed toward the external system being connect with transformer as an example
Case is introduced：
The reason of direction fineness angle φ=75 ° of main transformer protection device at this time, k=0 namely main transformer protection device
It is -165 ° of 15 ° of ＜ φ ＜ by actuating range.
Then when carrying out response debugging to electric network protection device, make short-circuit zero-sequence current short-circuit residual voltage-in advance respectively
166 °, -164 °, 14 ° and 16 °.
Certainly, θ here1、θ2、θ3And θ4It can also be other numerical value, and also not require to be equal, such as θ can be taken1
=1 °, θ2=1.5 °, θ3=1.2 ° and θ4It=1.6 °, can achieve the object of the present invention.
Preferably, when carrying out response debugging to electric network protection device, make short-circuit zero-sequence current short-circuit in advance respectively
- 90 ° of+360 ° of k- θ of residual voltage-φ1、-φ-90°+360°·k+θ2、-φ+90°+360°·k-θ3And+90 ° of-φ+
360°·k+θ4, when four kinds of responses of electric network protection device are correct, then the zero sequence direction overcurrent protection of electric network protection device
Actuating range is that the process of+90 ° of+360 ° of k of -90 ° of+360 ° of k ＜ φ ＜-φ of-φ is specially：
Enter " response " from the main menu of the debugging software of static test instrument.Zero-sequence current I0With UA=3U0For reference side
To zero-sequence current acts setting valve I0ZD=2A.
Main transformer protection device is carried out respectively the first response debugging, second response debugging, third response debugging and
4th response debugging, wherein：
Simulation (I in theoretical actuating range0Lag UAThat is 3U0At 164 °)
First response, which is debugged, includes：
State 1：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, the abnormal indicator light on panel to be shown enters state 2 after extinguishing；
It is understood that in order to avoid high voltage side current mutual inductor, high side voltage mutual inductor, zero sequence current mutual inductor
Break alarm and the progress for influencing debugging, here preferably by original state when voltage it is identical when being arranged to normal condition
Voltage, and the amplitude of electric current is set as 0.Each response debugging below is similarly.
State 2：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 ∠ -164 ° of A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t1S, wherein t1When action more than main transformer protection device is adjusted
Between；
Main transformer protection device carries out the first response；
It is understood that the first response here is specially：Zero sequence direction overcurrent I the first time limits of section act, and mother goes out
From scratch, tripping lamp is bright for mouth pressing plate voltage, shows that T01 (zero sequence direction overcurrent I the first time limits of section) element is dynamic in display device
Make, actuation time is action setting time.
When this method simulation be the single-line to ground fault of 220kV main transformers when, then at this time mother output clamping tool
Body is the mother output clamping of 220kV.Each response debugging below is similarly.
Simulation (I outside theoretical actuating range0Lag UAThat is 3U0At 166 °)
Second response, which is debugged, includes：
State 3：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, the abnormal indicator light on panel to be shown enters state 4 after extinguishing；
State 4：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 ∠ -166 ° of A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t2S, wherein t2When action more than main transformer protection device is adjusted
Between；
Main transformer protection device carries out the second response；
It is understood that the second response here is specially：Protection is failure to actuate.
In addition, state 3 and state 4 here is actually corresponding with the state 1 of main transformer protection device and state 2
, 3 and 4 or the like relational terms here are used merely to distinguish an entity or operation with another entity or operation
Come, without necessarily requiring or implying between these entities or operation there are any actual relationship or order, under
State 5 and state 6 are stated, similarly, details are not described herein for state 7 and state 8.
Simulation (I in theoretical actuating range0Advanced UAThat is 3U0At 14 °)
Third response, which is debugged, includes：
State 5：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, the abnormal indicator light on panel to be shown enters state 6 after extinguishing；
State 6：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 14 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t3S, wherein t3When action more than main transformer protection device is adjusted
Between；
Main transformer protection device carries out third response；
It is understood that third response here is specially：Zero sequence direction overcurrent I the first time limits of section act, and mother goes out
From scratch, tripping lamp is bright for mouth pressing plate voltage, shows that T01 (zero sequence direction overcurrent I the first time limits of section) element is dynamic in display device
Make, actuation time is action setting time.
Simulation (I outside theoretical actuating range0Advanced UAThat is 3U0At 16 °)
4th response, which is debugged, includes：
State 7：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, the abnormal indicator light on panel to be shown enters state 8 after extinguishing；
State 8：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 16 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t4S, wherein t4When action more than main transformer protection device is adjusted
Between；
Main transformer protection device carries out the 4th response；
It is understood that the 4th response here is specially：Protection is failure to actuate.
When the first response and third response are to act in zero sequence direction overcurrent I the first time limits of section, mother output clamping is electric
From scratch, tripping lamp is bright, shows T01 (zero sequence direction overcurrent I the first time limits of section) element movement in display device for pressure, when action
Between for action setting time；And second response and the 4th response when being that protection is failure to actuate, main transformer protection device
Zero sequence direction overcurrent protection actuating range is -165 ° of 15 ° of ＜ φ ＜.
Preferably, action setting time is 1.2s.
Specifically, action setting time here can be 1230ms, and certainly, action setting time can also be other numbers
Value, the present invention are not particularly limited herein.
Preferably, t1=t2=t3=t4=8s.
Certainly, t here1、t2、t3And t4Can also be other numerical value, as long as dynamic more than main transformer protection device
Make setting time, and t here1、t2、t3And t4Also the portion that not demand perfection is equal, can realize the object of the invention.
Preferably, main transformer protection device is RCS-978 main transformer protection devices.
Specifically, Fig. 4 is please referred to, Fig. 4 is a kind of connection signal of static test instrument and RCS-978 provided by the invention
Figure.
Here illustrate so that main transformer protection device is RCS-978 as an example：
The 1ID1 interfaces of the IAH interfaces of static test instrument and RCS-978 are connected；
The 1ID2 interfaces of the IBH interfaces of static test instrument and RCS-978 are connected；
The 1ID3 interfaces of the ICH interfaces of static test instrument and RCS-978 are connected；
The 1ID16 interfaces of the INH interfaces of static test instrument and RCS-978 are connected；
The 1UD1 interfaces of the UAH interfaces of static test instrument and RCS-978 are connected；
The 1UD2 interfaces of the UBH interfaces of static test instrument and RCS-978 are connected；
The 1UD3 interfaces of the UCH interfaces of static test instrument and RCS-978 are connected；
The 1UD4 interfaces of the UNH interfaces of static test instrument and RCS-978 are connected；
1ID4,1ID15 interface of RCS-978 is shorted together, 1UD4 and 1UD5 interfaces are shorted together.
Preferably, electric network protection device is supervoltage line protective device RCS-901 or supertension line is protected
Device RCS-902 or supervoltage line protective device RCS-931.
The present invention provides a kind of methods of determining zero sequence direction overcurrent protection actuating range, are filled for main transformer protection
It sets, this method determines that the theoretical of main transformer protection device acts by the direction fineness angle φ of main transformer protection device first
Range, then response debugging is being carried out to main transformer protection device by the theoretical actuating range determination of main transformer protection device
When short circuit zero-sequence current short-circuit residual voltage in advance angle, when the response of main transformer protection device is correct, to really
The zero sequence direction overcurrent protection actuating range for determining main transformer protection device is theoretical actuating range, it is seen then that the present invention can
It is accurate to determine main transformer protection device when fineness angle is zero sequence direction fineness angle in simulation singlephase earth fault manually
Zero sequence direction overcurrent protection actuating range.
It should be noted that in the present specification, relational terms such as first and second and the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (9)
1. a kind of method of determining zero sequence direction overcurrent protection actuating range is used for electric network protection device, which is characterized in that the party
Method includes：
Obtain the direction fineness angle φ of the electric network protection device；
Set the theoretical actuating range of the electric network protection device to -90 ° of+360 ° of+90 °+360 ° of k ＜ φ ＜-φ of-φ
K, wherein when the electric network protection device is main protection equipment for transformer and its zero sequence direction is directed toward transformer, k=1 is no
Then, k=0；
When carrying out response debugging to the electric network protection device, make short-circuit zero-sequence current short-circuit residual voltage-φ-in advance respectively
90°+360°·k-θ1、-φ-90°+360°·k+θ2、-φ+90°+360°·k-θ3And+90 ° of+360 ° of k+ θ of-φ4, when
When four kinds of responses of the electric network protection device are correct, then the zero sequence direction overcurrent protection of the electric network protection device acts model
It encloses for+90 ° of+360 ° of k of -90 ° of+360 ° of k ＜ φ ＜-φ of-φ, wherein θ1、θ2、θ3And θ4Range intervals be (0,
90°)。
2. the method as described in claim 1, which is characterized in that the electric network protection device is main protection equipment for transformer, and
The direction fineness angle φ of the main transformer protection device is 75 °, then the theoretical actuating range is -165 ° of 15 ° of ＜ φ ＜.
3. method as claimed in claim 2, which is characterized in that the θ1、θ2、θ3And θ4It is 1 °.
4. method as claimed in claim 3, which is characterized in that described to carry out response debugging to the electric network protection device
When, make short-circuit zero-sequence current -90 ° of+360 ° of k- θ of short circuit residual voltage-φ in advance respectively1、-φ-90°+360°·k+θ2、-φ
+90°+360°·k-θ3And+90 ° of+360 ° of k+ θ of-φ4, when four kinds of responses of the electric network protection device are correct, then
The zero sequence direction overcurrent protection actuating range of the electric network protection device be -90 ° of+360 ° of+90 ° of k ＜ φ ＜-φ of-φ+
The process of 360 ° of k is specially：
To the main transformer protection device carry out respectively the first response debugging, second response debugging, third response debugging and
4th response debugging, wherein：
First response, which is debugged, includes：
State 1：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, the abnormal indicator light on panel to be shown enters state 2 after extinguishing；
The state 2：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 ∠ -164 ° of A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t1S, wherein t1When action more than the main transformer protection device is adjusted
Between；
The main transformer protection device carries out the first response；
Second response, which is debugged, includes：
State 3：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, enter state 4 after the abnormal indicator light on the display panel extinguishes；
The state 4：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 ∠ -166 ° of A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t2S, wherein t2When action more than the main transformer protection device is adjusted
Between；
The main transformer protection device carries out the second response；
The third response, which is debugged, includes：
State 5：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, enter state 6 after the abnormal indicator light on the display panel extinguishes；
The state 6：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 14 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t3S, wherein t3When action more than the main transformer protection device is adjusted
Between；
The main transformer protection device carries out third response；
4th response, which is debugged, includes：
State 7：Ua=57 0 ° of ∠ V, Ub=57 ∠ -120 ° of V, Uc=57 120 ° of ∠ V；
Ia=00 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：By key control, enter state 8 after the abnormal indicator light on the display panel extinguishes；
The state 8：Ua=30 0 ° of ∠ V, Ub=0 ∠ -120 ° of V, Uc=0 120 ° of ∠ V；
Ia=2.1 16 ° of ∠ A, Ib=0 ∠ -120 ° of A, Ic=0 120 ° of ∠ A；
End mode is set as：Time control is set as t4S, wherein t4When action more than the main transformer protection device is adjusted
Between；
The main transformer protection device carries out the 4th response；
When first response and third response are to act in zero sequence direction overcurrent I the first time limits of section, mother outlet is pressed
From scratch, tripping lamp is bright for plate voltage, shows that T01 element movements, actuation time are the action setting time in display device；
And second response and the 4th response be when being that protection is failure to actuate, the zero sequence of the main transformer protection device
Directional over-current protection actuating range is -165 ° of 15 ° of ＜ φ ＜.
5. method as claimed in claim 4, which is characterized in that the action setting time is 1.2s.
6. method as claimed in claim 5, which is characterized in that the t1=t2=t3=t4=8s.
7. method as claimed in any one of claims 1 to 6, which is characterized in that the main transformer protection device is RCS-978
Main transformer protection device.
8. the method as described in claim 1, which is characterized in that become when the zero sequence direction of the main transformer protection device is directed toward
When depressor, the direction fineness angle φ of the main transformer protection device is 255 °, then the theoretical actuating range is 15 ° of ＜ φ ＜
195°。
9. the method as described in claim 1, which is characterized in that the electric network protection device is supervoltage line protective device
RCS-901 either supervoltage line protective device RCS-902 or supervoltage line protective device RCS-931.
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