CN104537465B - The determination method and device of the setting current of power distribution network - Google Patents
The determination method and device of the setting current of power distribution network Download PDFInfo
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- CN104537465B CN104537465B CN201410766499.7A CN201410766499A CN104537465B CN 104537465 B CN104537465 B CN 104537465B CN 201410766499 A CN201410766499 A CN 201410766499A CN 104537465 B CN104537465 B CN 104537465B
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Abstract
The invention discloses a kind of determination method and devices of the setting current of power distribution network.Wherein, this method includes：Obtain the line parameter circuit value information of power distribution network；According to the line parameter circuit value information, the total impedance of the power distribution network is obtained；The protection type and supply voltage grade of the power distribution network are obtained, and determines preset algorithm corresponding with the protection type, and voltage value corresponding with the supply voltage grade；According to the voltage value, the total impedance and the preset algorithm, the setting valve of the setting current of the power distribution network is determined.The present invention solves needs the artificial less efficient technical problem by virtue of experience carried out caused by adaptive setting in the prior art.
Description
Technical field
The present invention relates to field of power, a kind of determination method in particular to setting current of power distribution network and
Device.
Background technology
Power distribution network be by overhead transmission line, cable, shaft tower, distribution transformer, disconnecting switch, reactive compensation capacitor and some
The compositions such as affiliated facility, the network of important distribution electric energy effect is played in power network.Power distribution network generally uses closed loop design, opens
Inscription of loop, structure is radially.In small and medium-sized cities and the vast rural areas, power distribution network forms portion with overhead transmission line to be main
Point, feature is that number of, lines is numerous, and length is longer, and model, the parameter of circuit are different.
Currently, when the setting valve of the setting current to power distribution network calculates, need artificial by virtue of experience to relevant
Parameter is calculated, larger so as to cause workload, less efficient.
For above-mentioned problem, currently no effective solution has been proposed.
Invention content
It is existing at least to solve an embodiment of the present invention provides a kind of determination method and device of the setting current of power distribution network
The artificial less efficient technical problem by virtue of experience carried out caused by adaptive setting is needed in technology.
One side according to the ... of the embodiment of the present invention provides a kind of determination method of the setting current of power distribution network, including：
Obtain the line parameter circuit value information of power distribution network；According to above-mentioned line parameter circuit value information, the total impedance of above-mentioned power distribution network is obtained；It obtains above-mentioned
The protection type and supply voltage grade of power distribution network, and determine corresponding with above-mentioned protection type preset algorithm, and with it is above-mentioned
The corresponding voltage value of supply voltage grade；According to above-mentioned voltage value, above-mentioned total impedance and above-mentioned preset algorithm, above-mentioned distribution is determined
The setting valve of the setting current of net.
Above-mentioned line parameter circuit value information includes line type number, line length and power source internal impedance；Wherein, above-mentioned according to upper
Line parameter circuit value information is stated, the total impedance of above-mentioned power distribution network is obtained, including：Determine line impedance corresponding with above-mentioned circuit model；
According to above-mentioned line impedance, above-mentioned line length and above-mentioned power source internal impedance, the total impedance of above-mentioned power distribution network is obtained.
It is above-mentioned according to above-mentioned line impedance, above-mentioned line length and above-mentioned power source internal impedance, obtain above-mentioned power distribution network
Total impedance, including：The product of above-mentioned line impedance and above-mentioned line length is summed with above-mentioned power source internal impedance, is obtained
Above-mentioned total impedance.
It is above-mentioned according to above-mentioned voltage value, above-mentioned total impedance and above-mentioned preset algorithm, determine the setting current of above-mentioned power distribution network
Setting valve, including：Above-mentioned setting valve is determined by following above-mentioned preset algorithm：Above-mentioned setting valve=above-mentioned voltage value/above-mentioned
Total impedance × predetermined coefficient.
Above-mentioned according to above-mentioned voltage value, above-mentioned total impedance and above-mentioned preset algorithm, determine above-mentioned power distribution network adjusts electricity
After the setting valve of stream, further include：Show above-mentioned setting valve；Receive the practical setting valve that user inputs according to above-mentioned setting valve；
Obtain the load current of above-mentioned power distribution network；According to above-mentioned load current and preset sensitivity coefficient, actually adjusted to above-mentioned
Value is verified.
The load current of the above-mentioned above-mentioned power distribution network of acquisition, including：Receive the load of above-mentioned above-mentioned power distribution network input by user
Power；By above-mentioned bearing power divided by above-mentioned voltage value, above-mentioned load current is obtained.
It is above-mentioned above-mentioned practical setting valve to be verified according to above-mentioned load current and preset sensitivity coefficient, it wraps
It includes：If above-mentioned practical setting valve is more than the product of above-mentioned load current and above-mentioned preset sensitivity coefficient, the first school is shown
Test result, wherein above-mentioned first check results indicate that above-mentioned practical setting valve is correct；If above-mentioned practical setting valve is less than or equal to upper
The product for stating load current and above-mentioned preset sensitivity coefficient, then show the second check results, wherein above-mentioned second verification knot
Fruit indicates above-mentioned practical setting valve mistake.
Another aspect according to the ... of the embodiment of the present invention additionally provides a kind of determining device of the setting current of power distribution network, packet
It includes：First acquisition unit, the line parameter circuit value information for obtaining power distribution network；First computing unit, for being joined according to above-mentioned circuit
Number information, obtains the total impedance of above-mentioned power distribution network；Second acquisition unit, the protection type for obtaining above-mentioned power distribution network and power supply
Voltage class, and determine preset algorithm corresponding with above-mentioned protection type, and voltage corresponding with above-mentioned supply voltage grade
Value；Second computing unit, for according to above-mentioned voltage value, above-mentioned total impedance and above-mentioned preset algorithm, determining above-mentioned power distribution network
The setting valve of setting current.
The determining device of the setting current of above-mentioned power distribution network further includes：Display unit, for showing above-mentioned setting valve；It connects
Receive unit, the practical setting valve inputted according to above-mentioned setting valve for receiving user；Third acquiring unit, for obtaining above-mentioned match
The load current of power grid；Verification unit is used for according to above-mentioned load current and preset sensitivity coefficient, whole to above-mentioned reality
Definite value is verified.
Above-mentioned verification unit is right for executing following steps with according to above-mentioned load current and preset sensitivity coefficient
Above-mentioned practical setting valve is verified：If above-mentioned practical setting valve is more than above-mentioned load current and above-mentioned preset sensitivity coefficient
Product, then show the first check results, wherein above-mentioned first check results indicate that above-mentioned practical setting valve is correct；If above-mentioned
Practical setting valve is less than or equal to the product of above-mentioned load current and above-mentioned preset sensitivity coefficient, then shows the second verification knot
Fruit, wherein above-mentioned second check results indicate above-mentioned practical setting valve mistake.
In embodiments of the present invention, matched according to line parameter circuit value information by obtaining the line parameter circuit value information of power distribution network
The total impedance of power grid obtains the protection type and supply voltage grade of power distribution network, and determines pre- imputation corresponding with protection type
Method, and voltage value corresponding with supply voltage grade determine the whole of power distribution network according to voltage value, total impedance and preset algorithm
The setting valve of constant current, has achieved the purpose that the setting current of automatic calculating power distribution network, and different distribution are risen to realize
Net determines the technique effect of the efficiency of setting current, and then solves and need manually by virtue of experience to carry out adjusting meter in the prior art
Less efficient technical problem caused by calculating.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is a kind of flow signal of the determination method of the setting current of optional power distribution network according to the ... of the embodiment of the present invention
Figure；
Fig. 2 is that the flow of the determination method of the setting current of another optional power distribution network according to the ... of the embodiment of the present invention is shown
It is intended to；
Fig. 3 is that the flow of the determination method of the setting current of another optional power distribution network according to the ... of the embodiment of the present invention is shown
It is intended to；
Fig. 4 is a kind of structural representation of the determining device of the setting current of optional power distribution network according to the ... of the embodiment of the present invention
Figure；
Fig. 5 is a kind of structural representation of the determining device of the setting current of optional power distribution network according to the ... of the embodiment of the present invention
Figure.
Specific implementation mode
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work should all belong to the model that the present invention protects
It encloses.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that using in this way
Data can be interchanged in the appropriate case, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
It includes to be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment to cover non-exclusive
Those of clearly list step or unit, but may include not listing clearly or for these processes, method, product
Or the other steps or unit that equipment is intrinsic.
Embodiment 1
According to embodiments of the present invention, a kind of determination method of the setting current of power distribution network is provided, as shown in Figure 1, the party
Method includes：
S102, the line parameter circuit value information for obtaining power distribution network；
S104, according to line parameter circuit value information, obtain the total impedance of power distribution network；
S106, the protection type and supply voltage grade for obtaining power distribution network, and determine pre- imputation corresponding with protection type
Method, and voltage value corresponding with supply voltage grade；
S108, according to voltage value, total impedance and preset algorithm, determine the setting valve of the setting current of power distribution network.
Optionally, in the embodiment of the present invention, setting current refers to that relay protection judges to compare with time current when tripping
Standard value.The determining device of the setting current of power distribution network can provide a human-computer interaction interface, then, the work of power supply enterprise
Personnel then can be inputted and be obtained relevant information by the human-computer interaction interface.
Optionally, line parameter circuit value information includes line type number, line length and power source internal impedance.Wherein, such as Fig. 2 institutes
Show, according to line parameter circuit value information, obtains the total impedance of power distribution network, may comprise steps of：
S202, determination line impedance corresponding with circuit model；
S204, according to line impedance, line length and power source internal impedance, obtain the total impedance of power distribution network.
It should be noted that the staff that above-mentioned line parameter circuit value information can be electric company passes through above-mentioned man-machine friendship
Mutual interface is input to the determining device of the setting current of power distribution network.
Wherein, the embodiment of the present invention may be used Access databases, and the determining device of the setting current of power distribution network can be with
The corresponding line impedance of different circuit models, line conductance and line capacitance are stored in the database.I.e. above-mentioned determination
Line impedance corresponding with circuit model may include searching line impedance corresponding with circuit model in the database.
Optionally, in the embodiment of the present invention, the total impedance of power distribution network may include power distribution network under maximum operational mode
Total impedance under total impedance and minimum operational mode.Wherein, maximum operational mode refers to that power distribution network is run in this mode
When, there is minimum short-circuit impedance value, the maximum a kind of method of operation of short circuit current generated after short circuit occurs.Minimum operation side
Formula refers to, when power distribution network is run in this mode, has maximum short-circuit impedance value, the short circuit current generated after short circuit occurs most
A kind of small method of operation.
Optionally, according to line impedance, line length and power source internal impedance, the total impedance of power distribution network is obtained, including：It will
The product of line impedance and line length is summed with power source internal impedance, obtains total impedance.That is,
Total impedance=line impedance × line length+power source internal impedance.
Optionally, the determining device of the setting current of power distribution network, can be by above-mentioned after obtaining the total impedance of power distribution network
Human-computer interaction interface, display parameter setting as a result, the parameter setting result may include total impedance and line parameter circuit value information, with
Just staff checks.Staff can click " calculating " button in human-computer interaction interface, match after confirmation
The determining device of the setting current of power grid then carries out the calculating of setting current.
Optionally, the protection type and voltage class of power distribution network can be that staff is defeated by above-mentioned human-computer interaction interface
Enter, the determining device of the setting current of power distribution network can determine different preset algorithms according to different protection types, the guarantor
It may include fast tripping protection and overcurrent protection to protect type.Staff can input one or more, then power distribution network
The determining device of setting current can then obtain different setting valves.
Optionally, according to voltage value, total impedance and preset algorithm, the setting valve of the setting current of power distribution network is determined, including：
Setting valve is determined by following preset algorithm：Setting valve=voltage value/total impedance × predetermined coefficient.
It should be noted that the predetermined coefficient in the different corresponding preset algorithms of protection type is different.
Optionally, as shown in figure 3, according to voltage value, total impedance and preset algorithm, the setting current of power distribution network is determined
After setting valve, further include：
S302, display setting valve；
S304, the practical setting valve that user inputs according to setting valve is received；
S306, the load current for obtaining power distribution network；
S308, according to load current and preset sensitivity coefficient, practical setting valve is verified.
In the embodiment of the present invention, the determining device of the setting current of power distribution network can be in the setting current that power distribution network is determined
Setting valve after, which is shown by above-mentioned human-computer interaction interface, user can then input practical according to the setting valve
Setting valve.Wherein, user can choose the practical setting valve nearby according to the setting valve.For example, the setting current of power distribution network
The calculated setting valve of determining device is " 101A ", then, user can be according to nearby principle (or the original that rounds up
Then), practical setting valve " 100A " is inputted.
After receiving the practical setting valve that user inputs according to setting valve, the determining device of the setting current of power distribution network
The load current of power distribution network can be obtained, wherein the method for obtaining the load current of power distribution network may include：Receive user's input
Power distribution network bearing power；By bearing power divided by voltage value, load current is obtained.That is,
Load current=bearing power/voltage value.
Wherein, bearing power can refer to the power of the devices such as the air-conditioning of user side, refrigerator.
In the embodiment of the present invention, the determining device of the setting current of power distribution network can to practical setting valve input by user into
Row verification, if including practical setting valve be more than load current and preset sensitivity coefficient product, display first verify tie
Fruit, wherein the first check results indicate that practical setting valve is correct；If practical setting valve is less than or equal to load current and preset spirit
The product of sensitivity coefficient then shows the second check results, wherein the second check results indicate practical setting valve mistake.
For example, the practical setting valve of staff's input is " 100A ", then represent when the electric current in power distribution network is more than 100A
When then carry out fast tripping protection or overcurrent protection.If load current is " 40A ", preset sensitivity coefficient is 2, then 100A>40A
× 2, then it represents that the practical setting valve is correct, then shows that the first check results, the first check results indicate that practical setting valve is correct.
On the contrary, if practical setting valve is less than or equal to the product of load current and preset sensitivity coefficient, display the second verification knot
Fruit, wherein the second check results indicate practical setting valve mistake.
In a kind of optional embodiment, the determination method of the setting current of the power distribution network of the embodiment of the present invention can wrap
It includes：
1, user protects type, typing circuit by human-computer interaction interface incoming line parameter information including selection
Title, circuit model, line length select supply voltage grade, typing power source internal impedance, typing load impedance or load
Power.The determining device of the setting current of power distribution network calculates power distribution network in maximum operational mode according to above-mentioned line parameter circuit value information
Under total impedance and the total impedance under minimum operational mode.
2, the determining device display parameter setting of the setting current of power distribution network is as a result, user checks corresponding information, and clicks
" calculating " button starts calculating process.
3, the determining device of the setting current of power distribution network calculates maximum fortune according to preset algorithm corresponding with protection type
The setting valve of the setting valve of fast tripping protection and overcurrent protection under line mode.
4, user chooses practical setting valve nearby according to result of calculation.
5, preset sensitivity coefficient is called from database and shown to the determining device of the setting current of power distribution network, so as to
User modifies and confirms.
6, the determining device of the setting current of power distribution network is calculated according to sensitivity check algorithm, is as a result more than preset
Sensitivity coefficient, it indicates that sensitivity is enough, is indicated with √, be as a result less than preset sensitivity coefficient, indicate sensitivity not
Foot is needed to reset and be calculated, with × indicate.
It should be noted that sensitivity coefficient=practical setting valve/load current, can also pass through meter sensitivity here
Coefficient is compared with preset sensitivity coefficient, and then determines whether practical setting valve correct, the embodiment of the present invention to this not
It is limited.
7, export and print result of calculation.The determining device of the setting current of power distribution network stores result of calculation to number simultaneously
According to library, facilitates and call and inquire in the future.
In embodiments of the present invention, matched according to line parameter circuit value information by obtaining the line parameter circuit value information of power distribution network
The total impedance of power grid obtains the protection type and supply voltage grade of power distribution network, and determines pre- imputation corresponding with protection type
Method, and voltage value corresponding with supply voltage grade determine the whole of power distribution network according to voltage value, total impedance and preset algorithm
The setting valve of constant current, has achieved the purpose that the setting current of automatic calculating power distribution network, and different distribution are risen to realize
Net determines the technique effect of the efficiency of setting current.That is, work repeatability is adjusted by force due to power distribution network, calculation amount
Greatly, high labor cost, efficiency are low.Therefore, the determination method of the setting current of the power distribution network provided through the embodiment of the present invention can
To improve working efficiency, miswork rate is reduced, safe operation of electric network is conducive to.
It should be noted that for each method embodiment above-mentioned, for simple description, therefore it is all expressed as a series of
Combination of actions, but those skilled in the art should understand that, the present invention is not limited by the described action sequence because
According to the present invention, certain steps can be performed in other orders or simultaneously.Secondly, those skilled in the art should also know
It knows, embodiment described in this description belongs to preferred embodiment, and involved action and module are not necessarily of the invention
It is necessary.
Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation
The method of example can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but it is very much
In the case of the former be more preferably embodiment.Based on this understanding, technical scheme of the present invention is substantially in other words to existing
The part that technology contributes can be expressed in the form of software products, which is stored in a storage
In medium (such as ROM/RAM, magnetic disc, CD), including some instructions are used so that a station terminal equipment (can be mobile phone, calculate
Machine, server or network equipment etc.) method that executes each embodiment of the present invention.
Embodiment 2
According to embodiments of the present invention, it additionally provides a kind of for implementing the determination method of the setting current of above-mentioned power distribution network
The determining device of the setting current of power distribution network, as shown in figure 4, the device includes：
First acquisition unit 402, the line parameter circuit value information for obtaining power distribution network；
First computing unit 404, for according to the line parameter circuit value information, obtaining the total impedance of the power distribution network；
Second acquisition unit 406, the protection type for obtaining the power distribution network and supply voltage grade, and determining and institute
State the corresponding preset algorithm of protection type, and voltage value corresponding with the supply voltage grade；
Second computing unit 408, described according to the voltage value, the total impedance and the preset algorithm, determining
The setting valve of the setting current of power distribution network.
Optionally, in the embodiment of the present invention, the determining device of the setting current of power distribution network can provide human-computer interaction circle
Face, then, the staff of power supply enterprise then can be inputted and be obtained relevant information by the human-computer interaction interface.
Optionally, in the embodiment of the present invention, the total impedance of power distribution network may include power distribution network under maximum operational mode
Total impedance under total impedance and minimum operational mode.Wherein, maximum operational mode refers to that power distribution network is run in this mode
When, there is minimum short-circuit impedance value, the maximum a kind of method of operation of short circuit current generated after short circuit occurs.Minimum operation side
Formula refers to, when power distribution network is run in this mode, has maximum short-circuit impedance value, the short circuit current generated after short circuit occurs most
A kind of small method of operation.
Optionally, described according to the line impedance, the line length and the power source internal impedance, obtain described match
The total impedance of power grid, including：The product of the line impedance and the line length is asked with the power source internal impedance
With obtain the total impedance.That is,
Total impedance=line impedance × line length+power source internal impedance.
Optionally, the determining device of the setting current of power distribution network can pass through after the total impedance for obtaining the power distribution network
Above-mentioned human-computer interaction interface, display parameter setting is as a result, the parameter setting result may include total impedance and line parameter circuit value letter
Breath, so that staff checks.Staff after confirmation, press by " calculating " that can be clicked in human-computer interaction interface
Button, the determining device of the setting current of power distribution network then carry out the calculating of setting current.
Optionally, as shown in figure 5, the determining device of the setting current of power distribution network, further includes：
Display unit 502, for showing the setting valve；
Receiving unit 504, the practical setting valve inputted according to the setting valve for receiving user；
Third acquiring unit 506, the load current for obtaining the power distribution network；
Verification unit 508 is used for according to the load current and preset sensitivity coefficient, to the practical setting valve
It is verified.
In the embodiment of the present invention, the determining device of the setting current of power distribution network can be in the setting current that power distribution network is determined
Setting valve after, which is shown by above-mentioned human-computer interaction interface, user can then input practical according to the setting valve
Setting valve.Wherein, user can choose the practical setting valve nearby according to the setting valve.For example, the setting current of power distribution network
The calculated setting valve of determining device is " 101A ", then, user can be according to nearby principle (or the original that rounds up
Then), practical setting valve " 100A " is inputted.
After receiving the practical setting valve that user inputs according to the setting valve, the determination of the setting current of power distribution network
Device can obtain the load current of power distribution network, wherein the method for the load current for obtaining the power distribution network may include：
Receive the bearing power of the power distribution network input by user；By the bearing power divided by the voltage value, obtain described
Load current.That is,
Load current=bearing power/voltage value.
Wherein, bearing power can refer to the power of the devices such as the air-conditioning of user side, refrigerator.
In the embodiment of the present invention, the determining device of the setting current of power distribution network can to practical setting valve input by user into
Row verification, if including the practical setting valve more than the load current and the preset sensitivity coefficient product, show
Show the first check results, wherein first check results indicate that the practical setting valve is correct；If the practical setting valve is small
In the product equal to the load current and the preset sensitivity coefficient, then the second check results are shown, wherein described
Two check results indicate the practical setting valve mistake.
For example, the practical setting valve of staff's input is " 100A ", then represent when the electric current in power distribution network is more than 100A
When then carry out fast tripping protection or overcurrent protection.If load current is " 40A ", preset sensitivity coefficient is 2, then 100A>40A
× 2, then it represents that the practical setting valve is correct, then shows that the first check results, the first check results indicate the practical setting valve
Correctly.If on the contrary, the practical setting valve be less than or equal to the load current and the preset sensitivity coefficient product,
Then show the second check results, wherein second check results indicate the practical setting valve mistake.
Optionally, the verification unit is for executing following steps with according to the load current and preset sensitivity
Coefficient verifies the practical setting valve：
If the practical setting valve is more than the product of the load current and the preset sensitivity coefficient, the is shown
One check results, wherein first check results indicate that the practical setting valve is correct；
If the practical setting valve is less than or equal to the product of the load current and the preset sensitivity coefficient, show
Show the second check results, wherein second check results indicate the practical setting valve mistake.
In embodiments of the present invention, matched according to line parameter circuit value information by obtaining the line parameter circuit value information of power distribution network
The total impedance of power grid obtains the protection type and supply voltage grade of power distribution network, and determines pre- imputation corresponding with protection type
Method, and voltage value corresponding with supply voltage grade determine the whole of power distribution network according to voltage value, total impedance and preset algorithm
The setting valve of constant current, has achieved the purpose that the setting current of automatic calculating power distribution network, and different distribution are risen to realize
Net determines the technique effect of the efficiency of setting current.That is, work repeatability is adjusted by force due to power distribution network, calculation amount
Greatly, high labor cost, efficiency are low.Therefore, the determination method of the setting current of the power distribution network provided through the embodiment of the present invention can
To improve working efficiency, miswork rate is reduced, safe operation of electric network is conducive to.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
If the integrated unit in above-described embodiment is realized in the form of SFU software functional unit and as independent product
Sale in use, can be stored in the storage medium that above computer can be read.Based on this understanding, skill of the invention
Substantially all or part of the part that contributes to existing technology or the technical solution can be with soft in other words for art scheme
The form of part product embodies, which is stored in a storage medium, including some instructions are used so that one
Platform or multiple stage computers equipment (can be personal computer, server or network equipment etc.) execute each embodiment institute of the present invention
State all or part of step of method.
In the above embodiment of the present invention, all emphasizes particularly on different fields to the description of each embodiment, do not have in some embodiment
The part of detailed description may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed client, it can be by others side
Formula is realized.Wherein, the apparatus embodiments described above are merely exemplary, for example, the unit division, only one
Kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine or
It is desirably integrated into another system, or some features can be ignored or not executed.Another point, it is shown or discussed it is mutual it
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
It connects, can be electrical or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of determination method of the setting current of power distribution network, which is characterized in that including：
Obtain the line parameter circuit value information of power distribution network；
According to the line parameter circuit value information, the total impedance of the power distribution network is obtained；
The protection type and supply voltage grade of the power distribution network are obtained, and determines pre- imputation corresponding with the protection type
Method, and voltage value corresponding with the supply voltage grade；
According to the voltage value, the total impedance and the preset algorithm, the setting valve of the setting current of the power distribution network is determined；
The line parameter circuit value information includes line type number, line length and power source internal impedance；Wherein, described according to the line
Road parameter information obtains the total impedance of the power distribution network, including：Determine line impedance corresponding with the circuit model；According to
The line impedance, the line length and the power source internal impedance, obtain the total impedance of the power distribution network；Power distribution network it is total
Impedance includes total impedance of the power distribution network under maximum operational mode and the total impedance under minimum operational mode；
It is described according to the voltage value, the total impedance and the preset algorithm, determine the whole of the setting current of the power distribution network
Definite value, including：The setting valve is determined by preset algorithm as described below：The setting valve=the voltage value/total resistance
Anti- × predetermined coefficient.
2. according to the method described in claim 1, it is characterized in that, it is described according to the line impedance, the line length and
The power source internal impedance obtains the total impedance of the power distribution network, including：
The product of the line impedance and the line length is summed with the power source internal impedance, obtains total resistance
It is anti-.
3. according to the method described in claim 1, it is characterized in that, described according to the voltage value, the total impedance and institute
Preset algorithm is stated, after the setting valve for determining the setting current of the power distribution network, further includes：
Show the setting valve；
Receive the practical setting valve that user inputs according to the setting valve；
Obtain the load current of the power distribution network；
According to the load current and preset sensitivity coefficient, the practical setting valve is verified.
4. according to the method described in claim 3, it is characterized in that, the load current for obtaining the power distribution network, including：
Receive the bearing power of the power distribution network input by user；
By the bearing power divided by the voltage value, the load current is obtained.
5. method according to claim 3 or 4, which is characterized in that described according to the load current and preset spirit
Sensitivity coefficient verifies the practical setting valve, including：
If the practical setting valve is more than the product of the load current and the preset sensitivity coefficient, the first school is shown
Test result, wherein first check results indicate that the practical setting valve is correct；
If the practical setting valve is less than or equal to the product of the load current and the preset sensitivity coefficient, the is shown
Two verifications are as a result, wherein, second check results indicate the practical setting valve mistake.
6. a kind of determining device of the setting current of power distribution network, which is characterized in that including：
First acquisition unit, the line parameter circuit value information for obtaining power distribution network；
First computing unit, for according to the line parameter circuit value information, obtaining the total impedance of the power distribution network；
Second acquisition unit, the protection type for obtaining the power distribution network and supply voltage grade, and determine and the protection
The corresponding preset algorithm of type, and voltage value corresponding with the supply voltage grade；
Second computing unit, for according to the voltage value, the total impedance and the preset algorithm, determining the power distribution network
The setting valve of setting current；
The line parameter circuit value information includes line type number, line length and power source internal impedance；Wherein, described according to the line
Road parameter information obtains the total impedance of the power distribution network, including：Determine line impedance corresponding with the circuit model；According to
The line impedance, the line length and the power source internal impedance, obtain the total impedance of the power distribution network；Power distribution network it is total
Impedance includes total impedance of the power distribution network under maximum operational mode and the total impedance under minimum operational mode；
It is described according to the voltage value, the total impedance and the preset algorithm, determine the whole of the setting current of the power distribution network
Definite value, including：The setting valve is determined by preset algorithm as described below：The setting valve=the voltage value/total resistance
Anti- × predetermined coefficient.
7. device according to claim 6, which is characterized in that further include：
Display unit, for showing the setting valve；
Receiving unit, the practical setting valve inputted according to the setting valve for receiving user；
Third acquiring unit, the load current for obtaining the power distribution network；
Verification unit, for according to the load current and preset sensitivity coefficient, school to be carried out to the practical setting valve
It tests.
8. device according to claim 7, which is characterized in that the verification unit is for executing following steps with according to institute
Load current and preset sensitivity coefficient are stated, the practical setting valve is verified：
If the practical setting valve is more than the product of the load current and the preset sensitivity coefficient, the first school is shown
Test result, wherein first check results indicate that the practical setting valve is correct；
If the practical setting valve is less than or equal to the product of the load current and the preset sensitivity coefficient, the is shown
Two verifications are as a result, wherein, second check results indicate the practical setting valve mistake.
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| CN108551165A (en) * | 2018-03-28 | 2018-09-18 | 国网河南省电力公司郑州供电公司 | 10kV distribution protection definite value intelligence adaptive setting automatic identifying methods |
| CN113131449B (en) * | 2021-04-15 | 2023-05-16 | 广东电网有限责任公司广州供电局 | Setting method and device for protection device in distribution line |
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| CN102255391A (en) * | 2011-07-29 | 2011-11-23 | 南京因泰莱配电自动化设备有限公司 | Feeder automation system with on-line protective fixed value setting function |
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