CN109782096B - Power distribution station area capacity detection method and device - Google Patents
Power distribution station area capacity detection method and device Download PDFInfo
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Abstract
The application provides a power distribution station area capacity detection method, which comprises the following steps: obtaining a voltage average value of a to-be-detected distribution room at each acquisition moment and a load coefficient average value determined based on each to-be-determined capacity at each acquisition moment, wherein the load coefficient average value is determined by the current average value and a rated current corresponding to the to-be-determined capacity; determining a synthetic voltage value based on each undetermined capacity at each acquisition time according to the voltage average value at each acquisition time and the load coefficient average value determined based on each undetermined capacity at the acquisition time; calculating the difference value of the synthesized voltage value of the reference station area at each acquisition moment and the synthesized voltage value of the to-be-detected station area at the acquisition moment based on each undetermined capacity, and the average value of the difference values corresponding to all the acquisition moments based on each undetermined capacity; and determining the volume to be determined with the minimum absolute value corresponding to the average value of the difference values in all the volume to be determined, and determining the determined volume to be determined as the volume of the to-be-detected distribution room.
Description
Technical Field
The application relates to the field of power distribution and utilization, in particular to a power distribution station capacity detection method and device.
Background
For a long time, the distribution transformer capacity or the capacity on the nameplate parameter recorded in the power distribution related system is not consistent with the actual capacity, and the problem that the nameplate parameter is lower than the actual capacity or higher than the actual capacity exists, namely, the problem that the recording is wrong due to negligence during the recording of the system parameter; secondly, in order to save cost, part of manufacturers have the problem that a small-capacity transformer serves as a large-capacity transformer; thirdly, the special transformer user has the problem that the installation capacity is smaller than the actual rated capacity in order to pay less basic electricity fee. Therefore, it is necessary for the power department to verify the actual rated capacity of the distribution transformer and correct the wrong capacity information. The existing detection mode is manual checking, so that the efficiency is low and the cost is high.
Content of application
In view of this, in order to solve whether a distribution substation capacity parameter is correct, the embodiment of the present application provides a method and an apparatus for detecting a distribution substation capacity.
In a first aspect, an embodiment of the present application provides a power distribution station capacity detection method, where the method includes: obtaining a voltage average value of a to-be-detected distribution room at each acquisition moment and a load coefficient average value determined based on each to-be-determined capacity at each acquisition moment, wherein the load coefficient average value is determined by the current average value and a rated current corresponding to the to-be-determined capacity; determining a synthetic voltage value based on each undetermined capacity at each acquisition time according to the voltage average value at each acquisition time and the load coefficient average value determined based on each undetermined capacity at the acquisition time; calculating the difference value of the synthesized voltage value of the reference station area at each acquisition moment and the synthesized voltage value of the to-be-detected station area at the acquisition moment based on each undetermined capacity, and the average value of the difference values corresponding to all the acquisition moments based on each undetermined capacity; and determining the volume to be determined with the minimum absolute value corresponding to the average value of the difference values in all the volume to be determined, and determining the determined volume to be determined as the volume of the to-be-detected distribution room.
The capacity of the to-be-detected distribution room can be determined by calculating the difference value between the combined voltage of the to-be-detected distribution room with different capacities at each acquisition time and the combined voltage of the reference distribution room and calculating the capacity specification corresponding to the average value of the combined voltage difference values with different capacities at the acquisition time.
In one possible design, before obtaining the average voltage value of the to-be-detected station area at each acquisition time and the average load coefficient value determined based on each to-be-determined capacity at each acquisition time, the average load coefficient value is determined by the current average value and the rated current corresponding to the to-be-determined capacity, the method further includes: according to
Obtaining the average voltage value of the area to be detected at each acquisition moment, wherein UWait for avg(t) is the average value of three-phase voltage of the to-be-detected transformer area at the acquisition moment of t, UTo be a(t) collecting phase voltage value a and phase voltage value U of the detected transformer area at the time tB is waiting for(t) b-phase voltage value and U of the detected transformer area at the time of t acquisitionWait for cAnd (t) acquiring the phase c voltage value of the station area to be detected at the time t.
The three-phase voltage value of the to-be-detected distribution area at each acquisition moment is obtained through the operation data of the to-be-detected distribution area, and therefore the average value of the three-phase voltage of the to-be-detected distribution area at the t moment can be calculated through the formula.
In one possible design, the average voltage value of the to-be-detected distribution area at each acquisition time and the average load coefficient value determined based on each to-be-determined capacity at each acquisition time are obtained, and the average load coefficient value is composed of the average current value and the to-be-determined capacityBefore the corresponding rated current is determined, the method further comprises: according to
Obtaining the average value of the load coefficient, I, of each acquisition moment of the to-be-detected distribution roomWait for avg(t) is the three-phase average coefficient of the to-be-detected transformer area at the acquisition moment of t, ITo be a(t) is a phase current value of a at the acquisition time of the to-be-detected transformer area at the time t, IB is waiting for(t) is the b-phase current value of the acquisition time of the platform area to be detected at the time t, IWait for c(t) is the c-phase current value of the to-be-detected region at the acquisition time of t time, INThe rated current corresponding to each of the plurality of capacity specifications.
And obtaining the three-phase current value of the distribution area to be detected at each acquisition moment and the current value of each specification through the operation data of the distribution area to be detected, thereby calculating the three-phase average load coefficient of the distribution area to be detected at the moment t through the formula.
In a possible design, the determining, according to the voltage average value at each collection time and the load coefficient average value determined based on each undetermined capacity at the collection time, a synthesized voltage value based on each undetermined capacity at each collection time includes: and obtaining the sum of the voltage average value and the product of the average value of the load coefficient and the capacity coefficient of the to-be-detected transformer area at each acquisition moment, and taking the sum as the composite voltage of the to-be-detected transformer area.
And obtaining the composite voltage of the to-be-detected distribution area at each acquisition moment under different capacities by calculating the average value of the three-phase voltage of the to-be-detected distribution area at each acquisition moment and the product of the three-phase average load rate and the capacity coefficient of the to-be-detected distribution area under different capacity specifications at each acquisition moment.
In one possible design, the obtaining a sum of the voltage average and a product of the average of the load coefficients and the capacity coefficient as a composite voltage includes: according to UWait for h(t)＝UWait for avg(t)+IWait for avg(t) x constant obtaining the composite voltage of the distribution room to be detected at each acquisition moment，UWait for h(t) is the resultant voltage of the distribution room to be detected at the time of t acquisition, UWait for avg(t) is the average value of three-phase voltage of the to-be-detected transformer area at the acquisition moment of t, IWait for avgAnd (t) is the three-phase average coefficient of the to-be-detected transformer area at the acquisition time of t, and the constant is the capacity coefficient.
The average value of the three-phase voltage of the to-be-detected distribution area at each acquisition moment and the product of the three-phase average load rate and the capacity coefficient of the to-be-detected distribution area at each acquisition moment under different capacity specifications are obtained through calculation, and the composite voltage of the to-be-detected distribution area at each acquisition moment under different capacities can be obtained through calculation of the formula.
In one possible design, before obtaining an average value of a difference between a combined voltage value of the reference station area and a combined voltage value of the station area to be detected at each acquisition time, the method further includes: calculating the average voltage value and the average load rate of the reference station area at each acquisition moment; and obtaining the sum of the voltage average value and the product of the average value of the load coefficients and the capacity coefficients of the reference station area at each acquisition moment, and taking the sum as the synthesized voltage of the reference station area.
And calculating to obtain the three-phase voltage average value of the reference station area at each acquisition time and the product of the three-phase average load rate and the capacity coefficient of the reference station area at each acquisition time under different capacity specifications, thereby obtaining the synthetic voltage of the reference station area at each acquisition time.
In one possible design, the calculating the voltage average value of the reference station area at each acquisition time includes: according to
Obtaining a voltage average value, U, of each acquisition time of the reference station areaBasal avg(t) is the average value of three-phase voltage of the reference platform area at the acquisition moment of t, URadical a(t) collecting a phase voltage value of a at the moment of time t, U for the reference station areaRadical b(t) collecting b-phase voltage value, U, of reference station area at time tRadical cAnd (t) acquiring a phase c voltage value at the moment t by the reference station area.
The three-phase voltage value of the reference platform area at each acquisition time is obtained through the operation data of the reference platform area, so that the average value of the three-phase voltage of the reference platform area at each acquisition time can be calculated through the formula.
In one possible design, the calculating the average load rate of the reference station area at each acquisition time includes: according to
Obtaining the average value of the load coefficient of each acquisition time of the reference station area, IBasal avg(t) is the three-phase average coefficient of the reference station area at the acquisition time of t, IRadical a(t) is a phase current value of a at the acquisition time of the reference platform area at the time t, IRadical b(t) is the b-phase current value of the reference platform zone at the time of t acquisition, IRadical c(t) is the c-phase current value of the reference platform area at the acquisition time of t time, IRadical NThe rated current is corresponding to the capacity of the reference platform area.
And obtaining the three-phase current value of the reference platform area at each acquisition time and the current value of the reference platform area under the corresponding specification through the operation data of the reference platform area, so that the three-phase average load coefficient of the reference platform area at each acquisition time can be calculated through the formula.
In a second aspect, an embodiment of the present application provides a station area capacity detection apparatus, where the apparatus includes: the station area to be detected synthesized voltage module is used for obtaining a voltage average value of the station area to be detected at each acquisition time and a load coefficient average value determined based on each capacity to be determined at each acquisition time, and the load coefficient average value is determined by the current average value and a rated current corresponding to the capacity to be determined; the difference calculating module is used for determining a synthetic voltage value based on each undetermined capacity at each acquisition moment according to the voltage average value at each acquisition moment and the load coefficient average value determined based on each undetermined capacity at each acquisition moment; the multi-specification calculation module is used for calculating the difference value of the combined voltage value of the reference station area at each acquisition moment and the combined voltage value of the station area to be detected at the acquisition moment based on each undetermined capacity, and the average value of the difference values corresponding to all the acquisition moments based on each undetermined capacity; and the capacity identification module is used for determining the capacity to be determined with the minimum absolute value of the average value of the difference values in all the capacity to be determined, and determining the determined capacity to be determined as the capacity of the station area to be detected.
In one possible design, the method further comprises: three-phase voltage module of station area to be detected
Obtaining the average voltage value of the area to be detected at each acquisition moment, wherein UWait for avg(t) is the average value of three-phase voltage of the to-be-detected transformer area at the acquisition moment of t, UTo be a(t) collecting phase voltage value a and phase voltage value U of the detected transformer area at the time tB is waiting for(t) b-phase voltage value and U of the detected transformer area at the time of t acquisitionWait for cAnd (t) acquiring the phase c voltage value of the station area to be detected at the time t.
The embodiment of the invention provides a method and a device for detecting the capacity of a power distribution station area.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
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For a clearer explanation of the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a power distribution station capacity detection method according to a first embodiment of the present application;
fig. 2 is a supplementary flowchart of a station to be detected of the power distribution station capacity detection method according to the first embodiment of the present application;
fig. 3 is a reference block supplementary flowchart of a power distribution block capacity detection method according to a first embodiment of the present application;
fig. 4 is a block diagram of a station area capacity detection apparatus according to a second embodiment of the present application.
Detailed Description
First embodiment
Referring to fig. 1, fig. 1 shows a schematic diagram of a power distribution station area capacity detection method provided in a first embodiment of the present application, which specifically includes the following steps:
step S110, obtaining a voltage average value of the to-be-detected distribution room at each acquisition time and a load coefficient average value determined based on each undetermined capacity at each acquisition time, wherein the load coefficient average value is determined by the current average value and a rated current corresponding to the undetermined capacity.
Specifically, the station area to be detected is any station area in the line to be detected, the acquisition time is a time point for acquiring information, and the time point may be any time point, such as: information acquisition is performed every 6 hours, so that there are 4 acquisition points 24 hours a day. Correspondingly, 4 three-phase voltage values also exist in the same area one day, the voltage average value is a numerical value obtained by dividing the three-phase voltage of the same area by the number of phases in any acquisition time, the load coefficient average value is a product of the three-phase current of the same area in any acquisition time divided by the number of phases and a current value corresponding to any capacity specification of the area to be detected, the load coefficient average value is a product of the three-phase voltage average value of the area to be detected, the three-phase average load coefficient and the capacity coefficient at any acquisition time, and the product is used as a composite voltage of the corresponding acquisition time of the area to be detected.
And step S120, determining a synthetic voltage value based on each undetermined capacity at each acquisition time according to the voltage average value at each acquisition time and the load coefficient average value determined based on each undetermined capacity at the acquisition time.
Specifically, the reference station area is selected as any station area in the same line as the station area to be detected, the distribution transformation capacity and the CT value of the reference station area need to be verified manually and accurately, which is equivalent to determining a standard source in the same line first, and dividing the difference between the synthesized voltage of the reference station area and the synthesized voltage of the station area to be detected at each acquisition time by the number of the acquisition times, so as to obtain the average value of the differences between the synthesized voltages.
Step S130, calculating a difference value between a reference station area synthetic voltage value at each acquisition time and a synthetic voltage value of the station area to be detected at the acquisition time based on each undetermined capacity, and calculating an average value of the difference values corresponding to all the acquisition times based on each undetermined capacity.
Specifically, when calculating the corresponding three-phase average load coefficient, the station area to be detected also needs to consider that the station area to be detected belongs to the rated current corresponding to each of the multiple capacity specifications, which are the capacity specifications that we have the capability of possibly corresponding to the station area to be detected, in this embodiment, the station areas to be detected with the capacity specifications of 50kVA, 100kVA, 200kVA, 400kVA, and 630kVA are provided, each capacity specification has the corresponding rated current, and correspondingly, a corresponding station area to be detected composite voltage value is also provided, and each time one capacity specification is adopted, step S110 and step S120 are repeated once until the difference between the composite voltage of the station area to be detected and the composite voltage of the reference station area under all the capacity specifications is obtained.
Such as:
wherein: the method comprises the steps that delta U50, delta U100, delta U200, delta U400 and delta U630 are respectively average values of synthesized voltage difference values of to-be-detected station areas and standard station areas under the capacities of 50kVA, 100kVA, 200kVA, 400kVA and 630kVA, N is the number of acquisition moments, Uh50(t), Uh100(t), Uh200(t), Uh400(t) and Uh630(t) are respectively synthesized voltage difference values of t moments of to-be-detected station areas under the capacities of 50kVA, 100kVA, 200kVA, 400kVA and 630kVA, and Uh base (t) is the synthesized voltage difference value of t moments of the standard station areas.
Step S140, determining the volume to be determined with the minimum absolute value corresponding to the average value of the difference values in all the volume to be determined, and determining the determined volume to be determined as the volume of the station area to be detected.
Specifically, the capacity specification corresponding to the minimum absolute value of the difference between the combined voltage of the to-be-detected station area and the combined voltage of the reference station area under all the capacity specifications is the capacity specification of the to-be-detected station area. For example according to Dp＝min(abs(ΔU50),abs(ΔU100),abs(ΔU200),abs(ΔU400),abs(ΔU630) And (4) → D can determine the capacity of the station area to be detected, wherein Dp is the distribution identification capacity of Dyn11 station area (station area to be detected), and D is the capacity corresponding to the minimum value of absolute values of Delta U50, Delta U100, Delta U200, Delta U400 and Delta U630.
Referring to fig. 2, fig. 2 shows a supplementary flowchart of a power distribution station capacity detection method according to a first embodiment of the present application, and before step S110 in fig. 1, the method specifically includes the following steps:
step S210, according to the first formula of the station area to be detected
Obtaining the average voltage value of the area to be detected at each acquisition moment, wherein UWait for avg(t) is the average value of three-phase voltage of the to-be-detected transformer area at the acquisition moment of t, UTo be a(t) collecting phase voltage value a and phase voltage value U of the detected transformer area at the time tB is waiting for(t) b-phase voltage value and U of the detected transformer area at the time of t acquisitionWait for cAnd (t) acquiring the phase c voltage value of the station area to be detected at the time t.
Specifically, the three-phase voltage value of the to-be-detected distribution area at each acquisition time is obtained through the operation data of the to-be-detected distribution area, the acquisition time is t time in this embodiment, for example, every half hour is one acquisition time, 48 acquisition times exist in one day, and then t here is any integer from 1 to 48, so that the average value of the three-phase voltage of the to-be-detected distribution area at t time can be calculated through the formula.
Step S220, according toSecond formula of region to be detected
Obtaining the average value of the load coefficient, I, of each acquisition moment of the to-be-detected distribution roomWait for avg(t) is the three-phase average coefficient of the to-be-detected transformer area at the acquisition moment of t, ITo be a(t) is a phase current value of a at the acquisition time of the to-be-detected transformer area at the time t, IB is waiting for(t) is the b-phase current value of the acquisition time of the platform area to be detected at the time t, IWait for c(t) is the c-phase current value of the to-be-detected region at the acquisition time of t time, INThe rated current corresponding to each of the plurality of capacity specifications.
Specifically, the three-phase current value of the to-be-detected distribution room at each acquisition time and the current value of each specification are obtained through the operation data of the to-be-detected distribution room, the acquisition time is t time in this embodiment, for example, every half hour is one acquisition time, 48 acquisition times exist in one day, then t here is any integer from 1 to 48, and therefore the three-phase average load coefficient of the to-be-detected distribution room at t time can be calculated through the formula.
Step S230, obtaining a composite voltage of the to-be-detected distribution room at the corresponding collection time according to the voltage average value and the load coefficient average value of each collection time of the to-be-detected distribution room.
Specifically, according to a third formula U of the distribution room to be detectedWait for h(t)＝UWait for avg(t)+IWait for avg(t) x constant obtaining the resultant voltage, U, of the distribution room to be detected at each acquisition timeWait for h(t) is the resultant voltage of the distribution room to be detected at the time of t acquisition, UWait for avg(t) is the average value of three-phase voltage of the to-be-detected transformer area at the acquisition moment of t, IWait for avgAnd (t) is the three-phase average coefficient of the to-be-detected transformer area at the acquisition time of t, and the constant is the capacity coefficient.
The average value of the three-phase voltage of the to-be-detected distribution area at each acquisition moment and the product of the three-phase average load rate and the capacity coefficient of the to-be-detected distribution area at each acquisition moment under different capacity specifications are obtained through calculation, and the composite voltage of the to-be-detected distribution area at each acquisition moment under different capacities can be obtained through calculation of the formula.
Optionally, referring to fig. 3, fig. 3 shows a reference station area composite voltage flowchart of the power distribution station area capacity detection method provided in the first embodiment of the present application, where before step S120 in fig. 1, the specific steps of the flowchart are as follows:
step S310, according to the first formula of the reference station area
Obtaining a voltage average value, U, of each acquisition time of the reference station areaBasal avg(t) is the average value of three-phase voltage of the reference platform area at the acquisition moment of t, URadical a(t) collecting a phase voltage value of a at the moment of time t, U for the reference station areaRadical b(t) collecting b-phase voltage value, U, of reference station area at time tRadical cAnd (t) acquiring a phase c voltage value at the moment t by the reference station area.
Specifically, the three-phase voltage value of the reference station area at each acquisition time is obtained through the operation data of the reference station area, the acquisition time is t time in this embodiment, for example, each half hour is one acquisition time, and 48 acquisition times exist in one day, so that t here is any integer from 1 to 48, and thus the three-phase average load coefficient of the station area to be detected at t time can be calculated through the formula, and the average value of the three-phase voltage of the reference station area at each acquisition time can be calculated through the formula.
Step S320, according to the second formula of the reference platform area
Obtaining the average value of the load coefficient of each acquisition time of the reference station area, IBasal avg(t) is the three-phase average coefficient of the reference station area at the acquisition time of t, IRadical a(t) is a phase current value of a at the acquisition time of the reference platform area at the time t, IRadical b(t) is the b-phase current value of the reference platform zone at the time of t acquisition, IRadical c(t) is the c-phase current value of the reference platform area at the acquisition time of t time, IRadical NIs a reference station capacityThe rated current should be.
Specifically, the three-phase current value of the reference platform area at each acquisition time and the current value of the reference platform area under the corresponding specification are obtained through the operation data of the reference platform area, so that the three-phase average load coefficient of the reference platform area at each acquisition time can be calculated through the formula.
Step S330, calculating the average voltage value and the average load rate of the reference station area at each acquisition time; and obtaining the sum of the voltage average value and the product of the average value of the load coefficients and the capacity coefficients of the reference station area at each acquisition moment, and taking the sum as the synthesized voltage of the reference station area. .
Specifically, the third formula U is based on the reference platform areaRadical h(t)＝UBasal avg(t)+IBasal avg(t) x constant obtaining the resultant voltage, U, of the reference block at each acquisition timeRadical h(t) is the resultant voltage of the reference platform region at the acquisition time of t, UBasal avg(t) is the average value of three-phase voltage of the reference platform area at the acquisition moment of t, IBasal avgAnd (t) is a three-phase average coefficient of the reference station area at the acquisition time of t, and the constant is a capacity coefficient.
The three-phase voltage average value of the reference station area at each acquisition time and the product of the three-phase average load rate and the capacity coefficient of the reference station area at each acquisition time are obtained through calculation, and the synthetic voltage of the reference station area at each acquisition time can be obtained through calculation of the formula.
Second embodiment
Referring to fig. 4, fig. 4 shows a station area capacity detecting apparatus according to a second embodiment of the present application, where the apparatus 1000 includes:
the to-be-detected distribution area combined voltage module 1100 is used for obtaining a voltage average value of the to-be-detected distribution area at each acquisition time and a load coefficient average value determined based on each to-be-determined capacity at each acquisition time, wherein the load coefficient average value is determined by the current average value and a rated current corresponding to the to-be-determined capacity;
a difference calculating module 1200 for determining a composite voltage value based on each undetermined capacity at each collection time according to the voltage average value at each collection time and the load coefficient average value determined based on each undetermined capacity at each collection time;
the multiple specification calculation module 1300 is configured to calculate a difference between a reference station area synthesized voltage value at each acquisition time and a synthesized voltage value of the station area to be detected at the acquisition time based on each undetermined capacity, and an average value of the differences corresponding to all the acquisition times based on each undetermined capacity;
the capacity identification module 1400 is configured to determine a capacity to be determined, which is the smallest absolute value of the average value of the difference values, among all the capacities to be determined, and determine the determined capacity to be determined as the capacity of the to-be-detected station area.
The embodiment of the invention provides a power distribution station area capacity detection method which respectively obtains the difference value between the combined voltage of a reference station area and the combined voltage of a station area to be detected under different capacities at each acquisition time, and determines the capacity of the station area to be detected by calculating the average value of the difference values of the combined voltages of the standard station area and the station area to be detected under different capacities.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (5)
1. A power distribution station capacity detection method is characterized by comprising the following steps:
according to
Obtaining the average voltage value of the area to be detected at each acquisition moment, wherein UWait for avg(t) is the average value of the voltage of the to-be-detected transformer area at the acquisition moment of t, UTo be a(t) collecting phase voltage value a and phase voltage value U of the detected transformer area at the time tB is waiting for(t) b-phase voltage value and U of the detected transformer area at the time of t acquisitionWait for c(t) collecting c-phase voltage values of the transformer area to be detected at the moment t;
according to
Obtaining the average value of the load coefficient, I, of each acquisition moment of the to-be-detected distribution roomWait for avg(t) is the average value of the load coefficients of the to-be-detected station area at the acquisition moment of t, wherein ITo be a(t) Collecting a phase current value of a moment a for a to-be-detected transformer area at the moment tB is waiting for(t) is the b-phase current value of the acquisition time of the platform area to be detected at the time t, IWait for c(t) is the c-phase current value of the to-be-detected region at the acquisition time of t time, INRated current corresponding to each of the plurality of capacity specifications;
taking the sum of the voltage average value and the product of the load coefficient average value and the capacity coefficient at each acquisition moment as the synthetic voltage of the to-be-detected distribution room;
calculating the difference value of the synthesized voltage value of the reference distribution area and the synthesized voltage value of the distribution area to be detected at each acquisition moment, and calculating the average value of the difference values corresponding to all the acquisition moments based on the to-be-determined capacity;
and determining the volume to be determined with the minimum absolute value corresponding to the average value of the difference values in all the volume to be determined, and determining the determined volume to be determined as the volume of the to-be-detected distribution room.
2. The power distribution substation capacity detection method according to claim 1, before obtaining an average value of differences between a reference substation combined voltage value and a combined voltage of the substation to be detected at each acquisition time, further comprising:
calculating the voltage average value and the load coefficient average value of the reference station area at each acquisition moment;
and obtaining the sum of the voltage average value and the product of the load coefficient average value and the capacity coefficient of the reference station area at each acquisition moment, and taking the sum as the synthesized voltage of the reference station area.
3. A power distribution grid capacity detection method according to claim 2, wherein said calculating an average voltage value of the reference grid at each acquisition time comprises:
according to
Obtaining a voltage average value, U, of each acquisition time of the reference station areaBasal avg(t) is the average value of the voltage of the reference station area at the acquisition moment of t, URadical a(t) collecting a phase voltage value of a at the moment of time t, U for the reference station areaRadical b(t) collecting b-phase voltage value, U, of reference station area at time tRadical cAnd (t) acquiring a phase c voltage value at the moment t by the reference station area.
4. The method for detecting the capacity of the power distribution station area according to claim 2, wherein the calculating the average value of the load coefficients of the reference station area at each acquisition time comprises:
according to
Obtaining the average value of the load coefficient of each acquisition time of the reference station area, IBasal avg(t) is the average value of the load coefficient of the reference station area at the acquisition moment of t, IRadical a(t) is a phase current value of a at the acquisition time of the reference platform area at the time t, IRadical b(t) is the b-phase current value of the reference platform zone at the time of t acquisition, IRadical c(t) is the c-phase current value of the reference platform area at the acquisition time of t time, IRadical NThe rated current is corresponding to the capacity of the reference platform area.
5. An apparatus for detecting a capacity of a distribution room, the apparatus comprising:
a composite voltage module of the power distribution region to be detected
Obtaining the average voltage value of the area to be detected at each acquisition moment, wherein UWait for avg(t) is the average value of the voltage of the to-be-detected transformer area at the acquisition moment of t, UTo be a(t) collecting phase voltage value a and phase voltage value U of the detected transformer area at the time tB is waiting for(t) b-phase voltage value and U of the detected transformer area at the time of t acquisitionWait for c(t) collecting c-phase voltage values of the transformer area to be detected at the moment t; and according to
Obtaining the average value of the load coefficient, I, of each acquisition moment of the to-be-detected distribution roomWait for avg(t) is the average value of the load coefficients of the to-be-detected station area at the acquisition moment of t, wherein ITo be a(t) is a phase current value of a at the acquisition time of the to-be-detected transformer area at the time t, IB is waiting for(t) is the b-phase current value of the acquisition time of the platform area to be detected at the time t, IWait for c(t) is the c-phase current value of the to-be-detected region at the acquisition time of t time, INRated current corresponding to each of the plurality of capacity specifications;
the difference calculating module is used for determining a synthetic voltage value based on each undetermined capacity at each acquisition moment according to the voltage average value at each acquisition moment and the load coefficient average value determined based on each undetermined capacity at each acquisition moment; the sum of the voltage average value and the product of the load coefficient average value and the capacity coefficient at each acquisition moment is used as the synthetic voltage of the to-be-detected distribution room;
the multi-specification calculation module is used for calculating the difference value of the combined voltage value of the reference station area at each acquisition moment and the combined voltage value of the station area to be detected at the acquisition moment based on each undetermined capacity, and the average value of the difference values corresponding to all the acquisition moments based on each undetermined capacity;
and the capacity identification module is used for determining the capacity to be determined with the minimum absolute value of the average value of the difference values in all the capacity to be determined, and determining the determined capacity to be determined as the capacity of the station area to be detected.
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