CN104537465A - Determining method and device of setting current of power distribution network - Google Patents
Determining method and device of setting current of power distribution network Download PDFInfo
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Abstract
The invention discloses a determining method and device of a setting current of a power distribution network. The determining method comprises the steps of obtaining line parameter information of the power distribution network, obtaining total impedance of the power distribution network according to the line parameter information, obtaining the protection type and the power supply voltage grade of the power distribution network, determining a preset algorithm corresponding to the protection type and a voltage value corresponding to the power supply voltage grade, and determining the setting value of the setting current of the power distribution network according to the voltage value, the total impedance and the preset algorithm. The determining method and device of the setting current of the power distribution network solve the technical problem that as setting calculation needs to be carried out by people according to experience, efficiency is low in the prior art.
Description
Technical field
The present invention relates to field of power, in particular to a kind of defining method and device of setting current of power distribution network.
Background technology
Power distribution network is made up of overhead transmission line, cable, shaft tower, substation transformer, disconnector, reactive compensation capacitor and some affiliated facilities etc., plays the network of important distribution electric energy effect in power network.Power distribution network generally adopts closed loop design, open loop operation, and its structure radially.In small and medium-sized cities and vast rural area, power distribution network take overhead transmission line as chief component, and feature is that number of, lines is numerous, and length is longer, and model, the parameter of circuit are different.
At present, when the setting valve of the setting current to power distribution network calculates, need artificial by virtue of experience to calculate relevant parameter, thus cause that workload is comparatively large, efficiency is lower.
For above-mentioned problem, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide a kind of defining method and device of setting current of power distribution network, need manually by virtue of experience to carry out the lower technical matters of efficiency that adaptive setting causes at least to solve in prior art.
According to an aspect of the embodiment of the present invention, provide a kind of defining method of setting current of power distribution network, comprising: the line parameter circuit value information obtaining power distribution network; According to above-mentioned line parameter circuit value information, obtain the resulting impedance of above-mentioned power distribution network; Obtain protect types and the supply voltage grade of above-mentioned power distribution network, and determine the preset algorithm corresponding with above-mentioned protect types, and the magnitude of voltage corresponding with above-mentioned supply voltage grade; According to above-mentioned magnitude of voltage, above-mentioned resulting impedance and above-mentioned preset algorithm, determine the setting valve of the setting current of above-mentioned power distribution network.
Above-mentioned line parameter circuit value packets of information vinculum road model, line length and power source internal impedance; Wherein, above-mentioned according to above-mentioned line parameter circuit value information, obtain the resulting impedance of above-mentioned power distribution network, comprising: determine the 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, obtain the resulting impedance of above-mentioned power distribution network.
Above-mentioned according to above-mentioned line impedance, above-mentioned line length and above-mentioned power source internal impedance, obtain the resulting impedance of above-mentioned power distribution network, comprising: the product of above-mentioned line impedance and above-mentioned line length and above-mentioned power source internal impedance are sued for peace, obtains above-mentioned resulting impedance.
Above-mentioned according to above-mentioned magnitude of voltage, above-mentioned resulting impedance and above-mentioned preset algorithm, determine the setting valve of the setting current of above-mentioned power distribution network, comprising: determine above-mentioned setting valve by following above-mentioned preset algorithm: above-mentioned setting valve=above-mentioned magnitude of voltage/above-mentioned resulting impedance × predetermined coefficient.
Above-mentioned according to above-mentioned magnitude of voltage, above-mentioned resulting impedance and above-mentioned preset algorithm, after determining the setting valve of the setting current of above-mentioned power distribution network, also comprise: show above-mentioned setting valve; Receive the actual 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 default sensitivity coefficient, above-mentioned actual setting valve is verified.
The load current of the above-mentioned power distribution network of above-mentioned acquisition, comprising: the bearing power receiving the above-mentioned power distribution network of above-mentioned user input; By above-mentioned bearing power divided by above-mentioned magnitude of voltage, obtain above-mentioned load current.
Above-mentioned according to above-mentioned load current and default sensitivity coefficient, above-mentioned actual setting valve is verified, comprise: if above-mentioned actual setting valve is greater than the product of above-mentioned load current and above-mentioned default sensitivity coefficient, then show the first check results, wherein, the above-mentioned actual setting valve of above-mentioned first check results instruction is correct; If above-mentioned actual setting valve is less than or equal to the product of above-mentioned load current and above-mentioned default sensitivity coefficient, then show the second check results, wherein, the above-mentioned actual setting valve mistake of above-mentioned second check results instruction.
According to the another aspect of the embodiment of the present invention, additionally provide a kind of determining device of setting current of power distribution network, comprising: the first acquiring unit, for obtaining the line parameter circuit value information of power distribution network; First computing unit, for according to above-mentioned line parameter circuit value information, obtains the resulting impedance of above-mentioned power distribution network; Second acquisition unit, for obtaining protect types and the supply voltage grade of above-mentioned power distribution network, and determines the preset algorithm corresponding with above-mentioned protect types, and the magnitude of voltage corresponding with above-mentioned supply voltage grade; Second computing unit, for according to above-mentioned magnitude of voltage, above-mentioned resulting impedance and above-mentioned preset algorithm, determines the setting valve of the setting current of above-mentioned power distribution network.
The determining device of the setting current of above-mentioned power distribution network, also comprises: display unit, for showing above-mentioned setting valve; Receiving element, for receiving the actual setting valve that user inputs according to above-mentioned setting valve; 3rd acquiring unit, for obtaining the load current of above-mentioned power distribution network; Verification unit, for according to above-mentioned load current and default sensitivity coefficient, verifies above-mentioned actual setting valve.
Above-mentioned verification unit is for performing following steps with according to above-mentioned load current and default sensitivity coefficient, above-mentioned actual setting valve is verified: if above-mentioned actual setting valve is greater than the product of above-mentioned load current and above-mentioned default sensitivity coefficient, then show the first check results, wherein, the above-mentioned actual setting valve of above-mentioned first check results instruction is correct; If above-mentioned actual setting valve is less than or equal to the product of above-mentioned load current and above-mentioned default sensitivity coefficient, then show the second check results, wherein, the above-mentioned actual setting valve mistake of above-mentioned second check results instruction.
In embodiments of the present invention, by obtaining the line parameter circuit value information of power distribution network, according to line parameter circuit value information, obtain the resulting impedance of power distribution network, obtain protect types and the supply voltage grade of power distribution network, and determine the preset algorithm corresponding with protect types, and the magnitude of voltage corresponding with supply voltage grade, according to magnitude of voltage, resulting impedance and preset algorithm, determine the setting valve of the setting current of power distribution network, reach the object of the setting current automatically calculating power distribution network, thus achieve the technique effect of the efficiency rising to different power distribution network determination setting current, and then solve in prior art and need manually by virtue of experience to carry out the lower technical matters of efficiency that adaptive setting causes.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of the defining method of the setting current of a kind of optional power distribution network according to the embodiment of the present invention;
Fig. 2 is the schematic flow sheet of the defining method of setting current according to the optional power distribution network of the another kind of the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of the defining method of setting current according to the optional power distribution network of the another kind of the embodiment of the present invention;
Fig. 4 is the structural representation of the determining device of the setting current of a kind of optional power distribution network according to the embodiment of the present invention;
Fig. 5 is the structural representation of the determining device of the setting current of a kind of optional power distribution network according to the embodiment of the present invention.
Embodiment
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiment 1
According to the embodiment of the present invention, provide a kind of defining method of setting current of power distribution network, as shown in Figure 1, the method comprises:
The line parameter circuit value information of S102, acquisition power distribution network;
S104, according to line parameter circuit value information, obtain the resulting impedance of power distribution network;
S106, the protect types obtaining power distribution network and supply voltage grade, and determine the preset algorithm corresponding with protect types, and the magnitude of voltage corresponding with supply voltage grade;
S108, according to magnitude of voltage, resulting impedance and preset algorithm, determine the setting valve of the setting current of power distribution network.
Alternatively, in the embodiment of the present invention, when setting current refers to that relay protection judges tripping operation and the standard value that compares of time current.The determining device of the setting current of power distribution network can provide a human-computer interaction interface, and so, the staff of power supply enterprise then can be inputted by this human-computer interaction interface and obtain relevant information.
Alternatively, line parameter circuit value packets of information vinculum road model, line length and power source internal impedance.Wherein, as shown in Figure 2, according to line parameter circuit value information, obtain the resulting impedance of power distribution network, can comprise the following steps:
S202, determine the line impedance corresponding with circuit model;
S204, according to line impedance, line length and power source internal impedance, obtain the resulting impedance of power distribution network.
It should be noted that, above-mentioned line parameter circuit value information can be that the staff of electric company inputs to the determining device of the setting current of power distribution network by above-mentioned human-computer interaction interface.
Wherein, the embodiment of the present invention can adopt Access database, and line impedance, line conductance and line capacitance corresponding for different circuit model can be stored in this database by the determining device of the setting current of power distribution network.Namely above-mentionedly determine the line impedance corresponding with circuit model, can comprise and search the line impedance corresponding with circuit model in a database.
Alternatively, in the embodiment of the present invention, the resulting impedance of power distribution network can comprise the resulting impedance of power distribution network under maximum operational mode and the resulting impedance under minimum operational mode.Wherein, maximum operational mode refers to, when power distribution network runs in this mode, has minimum short-circuit impedance value, a kind of method of operation that the short-circuit current produced after being short-circuited is maximum.Minimum operational mode refers to, when power distribution network runs in this mode, has maximum short-circuit impedance value, a kind of method of operation that the short-circuit current produced after being short-circuited is minimum.
Alternatively, according to line impedance, line length and power source internal impedance, obtain the resulting impedance of power distribution network, comprising: the product of line impedance and line length and power source internal impedance are sued for peace, obtains resulting impedance.That is,
Resulting impedance=line impedance × line length+power source internal impedance.
Alternatively, the determining device of the setting current of power distribution network, after obtaining the resulting impedance of power distribution network, can pass through above-mentioned human-computer interaction interface, display parameter setting result, this setting parameter result can comprise resulting impedance and line parameter circuit value information, so that staff checks.Staff, after confirmation, can click " calculating " button in human-computer interaction interface, and the determining device of the setting current of power distribution network then carries out the calculating of setting current.
Alternatively; the protect types of power distribution network and electric pressure can be that staff is inputted by above-mentioned human-computer interaction interface; the determining device of the setting current of power distribution network can determine different preset algorithm according to different protect types, and this protect types can comprise fast tripping protection and overcurrent protection.Staff can input one or more, and so the determining device of the setting current of power distribution network then can draw different setting valves.
Alternatively, according to magnitude of voltage, resulting impedance and preset algorithm, determine the setting valve of the setting current of power distribution network, comprising: by following preset algorithm determination setting valve: setting valve=magnitude of voltage/resulting impedance × predetermined coefficient.
It should be noted that, the predetermined coefficient in the preset algorithm that different protect types is corresponding is different.
Alternatively, as shown in Figure 3, according to magnitude of voltage, resulting impedance and preset algorithm, after determining the setting valve of the setting current of power distribution network, also comprise:
S302, display setting valve;
The actual setting valve that S304, reception user input according to setting valve;
The load current of S306, acquisition power distribution network;
S308, according to load current and default sensitivity coefficient, actual setting valve to be verified.
In the embodiment of the present invention, the determining device of the setting current of power distribution network after the setting valve of setting current determining power distribution network, can show this setting valve by above-mentioned human-computer interaction interface, and user then can input actual setting valve according to this setting valve.Wherein, user according to this setting valve, can choose this actual setting valve nearby.Such as, the setting valve that the determining device of the setting current of power distribution network calculates is " 101A ", and so, user according to nearby principle (also can be the principle that rounds up), can input actual setting valve " 100A ".
After receiving the actual setting valve that user inputs according to setting valve, the determining device of the setting current of power distribution network can obtain the load current of power distribution network, wherein, the method obtaining the load current of power distribution network can comprise: the bearing power receiving the power distribution network of user's input; By bearing power divided by magnitude of voltage, obtain load current.That is,
Load current=bearing power/magnitude of voltage.
Wherein, bearing power can refer to the power of the device such as air-conditioning, refrigerator of user side.
In the embodiment of the present invention, the determining device of the setting current of power distribution network can verify the actual setting valve of user's input, if comprise the product that actual setting valve is greater than load current and default sensitivity coefficient, then show the first check results, wherein, the first check results indicates actual setting valve correct; If actual setting valve is less than or equal to the product of load current and default sensitivity coefficient, then show the second check results, wherein, the second check results indicates actual setting valve mistake.
Such as, the actual setting valve of staff's input is " 100A ", then represent when the electric current in power distribution network then carries out fast tripping protection or overcurrent protection more than during 100A.If load current is " 40A ", the sensitivity coefficient preset is 2, so 100A>40A × 2, then represent that this actual setting valve is correct, then show the first check results, the first check results indicates actual setting valve correct.On the contrary, if actual setting valve is less than or equal to the product of load current and default sensitivity coefficient, then show the second check results, wherein, the second check results indicates actual setting valve mistake.
In the optional embodiment of one, the defining method of the setting current of the power distribution network of the embodiment of the present invention can comprise:
1, user is by human-computer interaction interface incoming line parameter information, and comprising selection protect types, typing line name, circuit model, line length, selects supply voltage grade, the impedance of typing power source internal, typing loaded impedance or bearing power.The determining device of the setting current of power distribution network, according to above-mentioned line parameter circuit value information, calculates the resulting impedance of power distribution network under maximum operational mode and the resulting impedance under minimum operational mode.
2, the determining device display parameter setting result of the setting current of power distribution network, user checks corresponding information, and clicks " calculating " pushbutton enable computation process.
3, the determining device of the setting current of power distribution network is according to the preset algorithm corresponding with protect types, calculates the setting valve of fast tripping protection and the setting valve of overcurrent protection under maximum operational mode.
4, user is according to result of calculation, chooses actual setting valve nearby.
5, the determining device of the setting current of power distribution network is called and is shown the sensitivity coefficient preset, so that user modifies and confirms from database.
6, the determining device of the setting current of power distribution network calculates according to sensitivity check algorithm, and result is greater than default sensitivity coefficient, represents that sensitivity is enough, represent with √, result is less than default sensitivity coefficient, represents that sensitivity is not enough, need to reset and calculate, with × represent.
It should be noted that, sensitivity coefficient=actual setting valve/load current, also can pass through meter sensitivity coefficient here, compare with the sensitivity coefficient preset, and then determine that whether actual setting valve is correct, the embodiment of the present invention does not limit this.
7, export and print result of calculation.Result of calculation is stored to database by the determining device of the setting current of power distribution network simultaneously, and convenient future calls and inquires about.
In embodiments of the present invention; by obtaining the line parameter circuit value information of power distribution network; according to line parameter circuit value information; obtain the resulting impedance of power distribution network; obtain protect types and the supply voltage grade of power distribution network; and determine the preset algorithm corresponding with protect types; and the magnitude of voltage corresponding with supply voltage grade; according to magnitude of voltage, resulting impedance and preset algorithm; determine the setting valve of the setting current of power distribution network; reach the object of the setting current automatically calculating power distribution network, thus achieve the technique effect of the efficiency rising to different power distribution network determination setting current.That is, because work of the adjusting repeatability of power distribution network is strong, calculated amount is large, and cost of labor is high, efficiency is low.Therefore, the defining method of the setting current of the power distribution network provided by the embodiment of the present invention can be increased work efficiency, and reduces miswork rate, is conducive to safe operation of electric network.
It should be noted that, for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in instructions all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that can add required general hardware platform by software according to the method for above-described embodiment and realize, hardware can certainly be passed through, but in a lot of situation, the former is better embodiment.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprising some instructions in order to make a station terminal equipment (can be mobile phone, computing machine, server, or the network equipment etc.) perform the method for each embodiment of the present invention.
Embodiment 2
According to the embodiment of the present invention, additionally provide a kind of determining device of setting current of power distribution network of defining method of the setting current for implementing above-mentioned power distribution network, as shown in Figure 4, this device comprises:
First acquiring unit 402, for obtaining the line parameter circuit value information of power distribution network;
First computing unit 404, for according to described line parameter circuit value information, obtains the resulting impedance of described power distribution network;
Second acquisition unit 406, for obtaining protect types and the supply voltage grade of described power distribution network, and determines the preset algorithm corresponding with described protect types, and the magnitude of voltage corresponding with described supply voltage grade;
Second computing unit 408, for according to described magnitude of voltage, described resulting impedance and described preset algorithm, determines the setting valve of the setting current of described power distribution network.
Alternatively, in the embodiment of the present invention, the determining device of the setting current of power distribution network can provide a human-computer interaction interface, and so, the staff of power supply enterprise then can be inputted by this human-computer interaction interface and obtain relevant information.
Alternatively, in the embodiment of the present invention, the resulting impedance of power distribution network can comprise the resulting impedance of power distribution network under maximum operational mode and the resulting impedance under minimum operational mode.Wherein, maximum operational mode refers to, when power distribution network runs in this mode, has minimum short-circuit impedance value, a kind of method of operation that the short-circuit current produced after being short-circuited is maximum.Minimum operational mode refers to, when power distribution network runs in this mode, has maximum short-circuit impedance value, a kind of method of operation that the short-circuit current produced after being short-circuited is minimum.
Alternatively, described according to described line impedance, described line length and described power source internal impedance, obtain the resulting impedance of described power distribution network, comprising: the product of described line impedance and described line length and described power source internal impedance are sued for peace, obtains described resulting impedance.That is,
Resulting impedance=line impedance × line length+power source internal impedance.
Alternatively, the determining device of the setting current of power distribution network, after the resulting impedance obtaining described power distribution network, can pass through above-mentioned human-computer interaction interface, display parameter setting result, this setting parameter result can comprise resulting impedance and line parameter circuit value information, so that staff checks.Staff, after confirmation, can click " calculating " button in human-computer interaction interface, and the determining device of the setting current of power distribution network then carries out the calculating of setting current.
Alternatively, as shown in Figure 5, the determining device of the setting current of power distribution network, also comprises:
Display unit 502, for showing described setting valve;
Receiving element 504, for receiving the actual setting valve that user inputs according to described setting valve;
3rd acquiring unit 506, for obtaining the load current of described power distribution network;
Verification unit 508, for according to described load current and default sensitivity coefficient, verifies described actual setting valve.
In the embodiment of the present invention, the determining device of the setting current of power distribution network after the setting valve of setting current determining power distribution network, can show this setting valve by above-mentioned human-computer interaction interface, and user then can input actual setting valve according to this setting valve.Wherein, user according to this setting valve, can choose this actual setting valve nearby.Such as, the setting valve that the determining device of the setting current of power distribution network calculates is " 101A ", and so, user according to nearby principle (also can be the principle that rounds up), can input actual setting valve " 100A ".
After receiving the actual setting valve that user inputs according to described setting valve, the determining device of the setting current of power distribution network can obtain the load current of power distribution network, wherein, the method for the load current of the described power distribution network of described acquisition can comprise: the bearing power receiving the described power distribution network of described user input; By described bearing power divided by described magnitude of voltage, obtain described load current.That is,
Load current=bearing power/magnitude of voltage.
Wherein, bearing power can refer to the power of the device such as air-conditioning, refrigerator of user side.
In the embodiment of the present invention, the determining device of the setting current of power distribution network can verify the actual setting valve of user's input, if comprise the product that described actual setting valve is greater than described load current and described default sensitivity coefficient, then show the first check results, wherein, the described actual setting valve of described first check results instruction is correct; If described actual setting valve is less than or equal to the product of described load current and described default sensitivity coefficient, then show the second check results, wherein, the described actual setting valve mistake of described second check results instruction.
Such as, the actual setting valve of staff's input is " 100A ", then represent when the electric current in power distribution network then carries out fast tripping protection or overcurrent protection more than during 100A.If load current is " 40A ", the sensitivity coefficient preset is 2, so 100A>40A × 2, then represent that this actual setting valve is correct, then show the first check results, and the described actual setting valve of the first check results instruction is correct.On the contrary, if described actual setting valve is less than or equal to the product of described load current and described default sensitivity coefficient, then show the second check results, wherein, the described actual setting valve mistake of described second check results instruction.
Alternatively, described verification unit, for performing following steps with according to described load current and default sensitivity coefficient, verifies described actual setting valve:
If described actual setting valve is greater than the product of described load current and described default sensitivity coefficient, then show the first check results, wherein, the described actual setting valve of described first check results instruction is correct;
If described actual setting valve is less than or equal to the product of described load current and described default sensitivity coefficient, then show the second check results, wherein, the described actual setting valve mistake of described second check results instruction.
In embodiments of the present invention; by obtaining the line parameter circuit value information of power distribution network; according to line parameter circuit value information; obtain the resulting impedance of power distribution network; obtain protect types and the supply voltage grade of power distribution network; and determine the preset algorithm corresponding with protect types; and the magnitude of voltage corresponding with supply voltage grade; according to magnitude of voltage, resulting impedance and preset algorithm; determine the setting valve of the setting current of power distribution network; reach the object of the setting current automatically calculating power distribution network, thus achieve the technique effect of the efficiency rising to different power distribution network determination setting current.That is, because work of the adjusting repeatability of power distribution network is strong, calculated amount is large, and cost of labor is high, efficiency is low.Therefore, the defining method of the setting current of the power distribution network provided by the embodiment of the present invention can be increased work efficiency, and reduces miswork rate, is conducive to safe operation of electric network.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
If the integrated unit in above-described embodiment using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in the storage medium that above computer can read.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in storage medium, comprises all or part of step of some instructions in order to make one or more computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed client, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a defining method for the setting current of power distribution network, is characterized in that, comprising:
Obtain the line parameter circuit value information of power distribution network;
According to described line parameter circuit value information, obtain the resulting impedance of described power distribution network;
Obtain protect types and the supply voltage grade of described power distribution network, and determine the preset algorithm corresponding with described protect types, and the magnitude of voltage corresponding with described supply voltage grade;
According to described magnitude of voltage, described resulting impedance and described preset algorithm, determine the setting valve of the setting current of described power distribution network.
2. method according to claim 1, is characterized in that, described line parameter circuit value packets of information vinculum road model, line length and power source internal impedance;
Wherein, described according to described line parameter circuit value information, obtain the resulting impedance of described power distribution network, comprising:
Determine the line impedance corresponding with described circuit model;
According to described line impedance, described line length and described power source internal impedance, obtain the resulting impedance of described power distribution network.
3. method according to claim 2, is characterized in that, described according to described line impedance, described line length and described power source internal impedance, obtains the resulting impedance of described power distribution network, comprising:
The product of described line impedance and described line length and described power source internal impedance are sued for peace, obtains described resulting impedance.
4. according to the method in any one of claims 1 to 3, it is characterized in that, described according to described magnitude of voltage, described resulting impedance and described preset algorithm, determine the setting valve of the setting current of described power distribution network, comprising:
Described setting valve is determined by the following stated preset algorithm:
Described setting valve=described magnitude of voltage/described resulting impedance × predetermined coefficient.
5. method according to claim 1, is characterized in that, described according to described magnitude of voltage, described resulting impedance and described preset algorithm, after determining the setting valve of the setting current of described power distribution network, also comprises:
Show described setting valve;
Receive the actual setting valve that user inputs according to described setting valve;
Obtain the load current of described power distribution network;
According to described load current and default sensitivity coefficient, described actual setting valve is verified.
6. method according to claim 5, is characterized in that, the load current of the described power distribution network of described acquisition, comprising:
Receive the bearing power of the described power distribution network of described user input;
By described bearing power divided by described magnitude of voltage, obtain described load current.
7. the method according to claim 5 or 6, is characterized in that, described according to described load current and default sensitivity coefficient, verifies, comprising described actual setting valve:
If described actual setting valve is greater than the product of described load current and described default sensitivity coefficient, then show the first check results, wherein, the described actual setting valve of described first check results instruction is correct;
If described actual setting valve is less than or equal to the product of described load current and described default sensitivity coefficient, then show the second check results, wherein, the described actual setting valve mistake of described second check results instruction.
8. a determining device for the setting current of power distribution network, is characterized in that, comprising:
First acquiring unit, for obtaining the line parameter circuit value information of power distribution network;
First computing unit, for according to described line parameter circuit value information, obtains the resulting impedance of described power distribution network;
Second acquisition unit, for obtaining protect types and the supply voltage grade of described power distribution network, and determines the preset algorithm corresponding with described protect types, and the magnitude of voltage corresponding with described supply voltage grade;
Second computing unit, for according to described magnitude of voltage, described resulting impedance and described preset algorithm, determines the setting valve of the setting current of described power distribution network.
9. device according to claim 8, is characterized in that, also comprises:
Display unit, for showing described setting valve;
Receiving element, for receiving the actual setting valve that user inputs according to described setting valve;
3rd acquiring unit, for obtaining the load current of described power distribution network;
Verification unit, for according to described load current and default sensitivity coefficient, verifies described actual setting valve.
10. device according to claim 9, is characterized in that, described verification unit, for performing following steps with according to described load current and default sensitivity coefficient, verifies described actual setting valve:
If described actual setting valve is greater than the product of described load current and described default sensitivity coefficient, then show the first check results, wherein, the described actual setting valve of described first check results instruction is correct;
If described actual setting valve is less than or equal to the product of described load current and described default sensitivity coefficient, then show the second check results, wherein, the described actual setting valve mistake of described second check results instruction.
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| CN104537465B (en) | 2018-11-06 |
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