CN113452043B - Method, device, equipment and medium for governing three-phase unbalance of transformer area - Google Patents

Method, device, equipment and medium for governing three-phase unbalance of transformer area Download PDF

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CN113452043B
CN113452043B CN202111000350.4A CN202111000350A CN113452043B CN 113452043 B CN113452043 B CN 113452043B CN 202111000350 A CN202111000350 A CN 202111000350A CN 113452043 B CN113452043 B CN 113452043B
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phase
user
current value
users
difference
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CN113452043A (en
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韩佳锐
梁英廉
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Zhanjiang Power Supply Bureau of Guangdong Power Grid Co Ltd
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Zhanjiang Power Supply Bureau of Guangdong Power Grid Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
    • H02J3/144—Demand-response operation of the power transmission or distribution network
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The application discloses a method, a device, equipment and a medium for treating three-phase unbalance of a transformer area, which comprise the following steps: acquiring voltage and current data of a user ammeter in a transformer area and a total load of a public distribution transformer load terminal at fixed time; determining the voltage and current data of users on each phase at each moment and the total load of a public distribution transformer load terminal; dividing the total load of the public distribution transformer load terminal by 3 to obtain an ideal load value of each phase at each moment, and calculating an ideal current value of each phase; calculating a difference between the total current value of each phase and the ideal current value of each phase; determining the calling-in and calling-out modes of the users on each phase according to the difference; counting the calling-in and calling-out modes of all the users at each moment to obtain the user with the most times of adjustment; and calculating the adjusted three-phase current, and if the adjusted three-phase current does not accord with the preset three-phase balance standard, executing corresponding adjustment on each phase user. The load adjusting device can adjust three load conditions rapidly, improve load adjusting efficiency and avoid waste of manpower and material resources.

Description

Method, device, equipment and medium for governing three-phase unbalance of transformer area
Technical Field
The application relates to the technical field of three-phase balance adjustment of a power grid, in particular to a method, a device, equipment and a medium for governing three-phase unbalance of a transformer area.
Background
At present, the three-phase imbalance phenomenon in a transformer area is more and more common due to the reasons of uneven distribution of electric loads supplied by a public distribution transformer, random variation of the electric loads and the like. Therefore, problems which are not beneficial to the healthy operation of the power grid are caused, and for the distribution network side, the three-phase imbalance reduces the output and overload capacity of the transformer and increases the line loss and the transformer loss. For the user side, the voltage quality of a certain phase is higher or lower due to unbalance, and the user voltage quality is influenced. The existing three-phase unbalance management method mainly comprises two types, wherein one type adjusts the load according to the estimated power supply split-phase distribution condition to reduce the total unbalance degree, and the other type switches a capacitor or an electric reactor through different static switches to realize the functions of transferring active current, sending or absorbing reactive current and the like.
The first method requires the load to be adjustable, and the adjustment of the load cannot reach the ideal average combination, and the adjustment is performed according to the degree of unbalance, which can be completed only by consuming a large amount of manpower and time; the second category is load compensation, the main issues are cost and capacity.
Disclosure of Invention
The application provides a method, a device, equipment and a medium for governing three-phase unbalance of a platform area, so that three load conditions can be quickly adjusted, the load adjustment efficiency is improved, and waste of manpower and material resources is avoided.
In view of the above, a first aspect of the present application provides a method for treating three-phase imbalance of a platform area, the method including:
step 101, acquiring voltage and current data of a user electric meter in a transformer area at regular time and a total load of a public distribution transformer load terminal;
step 102, determining voltage and current data of users on each phase at each moment and total load of the public distribution transformer load terminal;
103, dividing the total load of the public distribution transformer load terminal by 3 to obtain an ideal load value of each phase at each moment, and dividing the ideal load value by the phase voltage of each phase to obtain an ideal current value of each phase;
104, calculating the total current value of each phase according to the current values of all the user electric meters on each phase, and calculating the difference value I between the total current value of each phase and the ideal current value of each phaseDifference (D)；
105, determining a calling-in and calling-out mode of a user on each phase at each moment according to a difference value between the total current value of each phase at each moment and the ideal current value of each phase;
step 106, counting the calling-in and calling-out modes of all the users at each moment, and counting the users needing the most times of adjustment;
step 107, correspondingly adjusting the user with the most number of times of adjustment and calculating the three-phase current value after the user is adjusted, if the three-phase current value after the user is adjusted does not accord with the preset three-phase balance degree standard, repeatedly executing the step 105 and the step 107 until the adjusted three-phase current accords with the preset three-phase balance degree standard;
and 108, correspondingly adjusting each phase user according to the user adjustment mode meeting the preset three-phase balance standard.
Optionally, the statistics of the call-in and call-out modes of the users of each phase at each time includes:
and (4) counting the calling-in and calling-out modes of all the users at each moment in the peak time period, and counting the users needing the most adjustment times.
Optionally, the method further includes:
and respectively transmitting high-frequency pulse signals to the ABC three phases, identifying the phase of each user by detecting the pulse signals of the user electric meters, and outputting A, B, C user electric meter numbers corresponding to the three phases.
Optionally, the determining, according to a difference between the total current value of each phase at each time and the ideal current value of each phase, a call-in/call-out mode of the user on each phase is specifically:
when the difference value is a negative value, the total current value of each phase is smaller than the ideal current value of each phase, and a user needs to be called; when the difference value is a positive value, the total current value of each phase is larger than the ideal current value of each phase, and a user needs to be called out;
when one phase needs to call out the user and the other two phases need to call in the user, screening the I with the current value closest to the phase sequence needing to be called in from the phase sequence needing to call out the userDifference (D)Recording the adjustment mode of the screened user;
when two phases need to call out users and the other phase needs to call in users, I with the current value closest to the phase sequence needing to be called out is screened from the phase sequences of the two users needing to be called outDifference (D)Recording the adjustment mode of the screened user;
when one phase needs to be called out, one phase needs to be called in and the other phase does not need to be operated, selecting I with the current value closest to the phase sequence needing to be called in from the phase sequence needing to be called outDifference (D)And (4) recording the adjustment modes of the screened users.
The second aspect of the present application provides an apparatus for treating three-phase unbalance of a platform area, the apparatus comprising:
the acquisition unit is used for acquiring voltage and current data of the user electric meters in the distribution area and the total load of the public distribution transformer load terminal at regular time;
the determining unit is used for determining the voltage and current data of users on each phase at each moment and the total load of the public distribution transformer load terminal;
the ideal current determining unit is used for dividing the total load of the public distribution transformer load terminal by 3 to obtain an ideal load value of each phase at each moment, and dividing the ideal load value by the phase voltage of each phase to obtain an ideal current value of each phase;
a difference value calculating unit for calculating the total current value of each phase according to the current values of all the user electric meters on each phase, and calculating the difference value I between the total current value of each phase and the ideal current value of each phaseDifference (D)；
The adjustment mode determining unit is used for determining the calling-in and calling-out mode of the user on each phase at each moment according to the difference value between the total current value of each phase at each moment and the ideal current value of each phase;
the statistical unit is used for counting the calling-in and calling-out modes of all the users at each moment and counting the users needing the most times of adjustment;
the standard comparison unit is used for correspondingly adjusting the user with the most times of adjustment and calculating a three-phase current value after the user is adjusted, if the three-phase current value after the user is adjusted does not accord with the preset three-phase balance standard, the steps of the adjustment mode determination unit, the statistical unit and the standard comparison unit are repeatedly executed until the adjusted three-phase current accords with the preset three-phase balance standard;
and the adjusting unit is used for correspondingly adjusting each phase user according to a user adjusting mode meeting the standard of the preset three-phase balance degree.
Optionally, the statistical unit is specifically configured to count call-in and call-out modes of each phase of users at each time of the peak time period, and count users requiring the most adjustment times.
Optionally, the method further includes:
and the user identification unit is used for respectively transmitting high-frequency pulse signals to the ABC three phases, identifying the phase of each user by detecting the pulse signals of the user electric meters, and outputting A, B, C user electric meter numbers corresponding to the three phases.
Optionally, the adjustment mode determining unit further includes:
a first adjusting unit, for screening the I with the current value closest to the phase sequence to be called out from the phase sequence to be called out when one phase needs to be called out and the other two phases need to be called inDifference (D)Recording the adjustment mode of the screened user;
the second adjusting unit is used for screening out users with current values closest to the I difference of the phase sequence to be called out from the phase sequences of the two users to be called out when the two users to be called out and the other user to be called in, and recording the adjusting modes of the screened users;
and the third adjusting unit is used for selecting the user with the current value closest to the I difference of the phase sequence needing to be called from the phase sequence needing to be called when one phase needs to be called out, one phase needs to be called in and the other phase does not need to be operated, and recording the adjusting mode of the screened user.
The third aspect of the present application provides an apparatus for treating three-phase imbalance of a platform area, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the steps of the method for treating the three-phase imbalance of the platform area according to the instructions in the program code.
A fourth aspect of the present application provides a computer-readable storage medium for storing program code for performing the method of the first aspect.
According to the technical scheme, the method has the following advantages:
the application provides a method for treating three-phase unbalance of a platform area, which comprises the following steps: timing acquisition of voltage and current data of user electric meters in distribution area, and public useDistributing and transforming the total load of the load terminal; determining voltage and current data of users on each phase at each moment and the total load of the public distribution transformer load terminal; dividing the total load of the public distribution transformer load terminal by 3 to obtain an ideal load value of each phase at each moment, and dividing the ideal load value by the phase voltage of each phase to obtain an ideal current value of each phase; calculating the total current value of each phase according to the current values of all the user electric meters on each phase, and calculating the difference value I between the total current value of each phase and the ideal current value of each phaseDifference (D)(ii) a Determining a calling-in and calling-out mode of a user on each phase at each moment according to a difference value between the total current value of each phase at each moment and the ideal current value of each phase; counting the calling-in and calling-out modes of all the users at each moment, and counting the users needing the most times of adjustment; correspondingly adjusting the users with the most times of adjustment and calculating the three-phase current value after the users are adjusted, if the three-phase current value after the users are adjusted does not accord with the preset three-phase balance standard, repeatedly executing the steps until the three-phase current after the adjustment accords with the preset three-phase balance standard; and correspondingly adjusting each phase user according to a user adjustment mode meeting the preset three-phase balance standard.
According to the method, the difference value between each phase current value and an ideal current value at each moment is calculated by determining the voltage and current data of the user side and the total load data of the distribution transformer load terminal, users needing to be called in and out are determined according to the difference value, the proportion of the users to the three-phase imbalance influence is judged, and infinite approximation to three-phase balance is achieved through multiple times of calculation, so that the adjustment user information is output to low-voltage operation and maintenance personnel, the three-phase imbalance after adjustment can be greatly improved, and the dynamic balance of the three-phase load is achieved.
Drawings
FIG. 1 is a flow chart of a method of managing three-phase imbalance in a distribution area according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of an embodiment of an apparatus for managing three-phase imbalance in a platform area according to the present application;
FIG. 3 is a schematic diagram of an embodiment of an apparatus for treating three-phase imbalance in a platform area according to the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a flowchart of a method of an embodiment of a method for treating three-phase imbalance in a platform area according to the present application, as shown in fig. 1, where fig. 1 includes:
step 101, acquiring voltage and current data of a user electric meter in a transformer area at regular time and a total load of a public distribution transformer load terminal;
it should be noted that, in the present application, the smart electric meter may be adopted to collect the electric meter voltage and current information of all users in the distribution area at regular time, and collect the related information of the public distribution and transformation load terminal at the same time, so as to determine the load, voltage and current data of the public distribution and transformation load terminal and all users in the distribution area at each time, and upload the collected data at each time to the database, where the data recorded at each time may be: xx public variables, time, total load of load terminal, xx user, time, voltage and current ].
Step 102, determining voltage and current data of users on each phase at each moment and total load of a public distribution transformer load terminal;
it should be noted that, in the present application, it is necessary to determine the voltage and current data of the users on each phase at each time and the total load of the common distribution transformer load terminal, that is, it is necessary to separate the phase sequence of each user from all the user data, so as to determine the user data on each phase at each time.
In a specific embodiment, before step 102, the application further needs to determine the user number of each phase, and the method for determining the user number of each phase may be:
and respectively transmitting high-frequency pulse signals to the ABC three phases, identifying the phase of each user by detecting the pulse signals of the user electric meters, and outputting A, B, C user electric meter numbers corresponding to the three phases.
The data set after phase sequence separation was:
data set examples, as in table 1: (X, Y, Z represents the number of the electric meter, U, V, W represents the value of the user current)
TABLE 1 data set after phase sequence separation
Figure DEST_PATH_IMAGE001
Step 103, dividing the total load of the public distribution transformer load terminal by 3 to obtain an ideal load value of each phase at each moment, and dividing the ideal load value by the phase voltage of each phase to obtain an ideal current value of each phase;
it should be noted that, in the present application, the total load of the public distribution transformer load terminal is divided by 3 to obtain an average load value of each phase at each moment, that is, an ideal load value of each phase, and the ideal load value is divided by the phase voltage of each phase to obtain an ideal current value of each phase.
104, calculating the total current value of each phase according to the current values of all the user electric meters on each phase, and calculating the difference value I between the total current value of each phase and the ideal current value of each phaseDifference (D)；
It should be noted that, according to the current data in the data group after the phase sequence is separated, the actual total current value of each phase can be calculated, and the difference value I is obtained by subtracting the ideal current value of each phase from the actual total current valueDifference (D). In addition, the current and voltage data of the users at each moment in the peak time period and the total load of the public distribution transformer load terminal can be selected, so that the representative time period of the peak time period is selected, and the users with large influence on the three-phase imbalance in the peak time period are determined. For example, the present application may select the peak value exceeding the distribution transformer 2/3 to be counted as the peak time period, so as to obtain the load and voltage of the public distribution transformer load terminal and all users in the station area during the peak time periodCurrent data.
105, determining a calling-in and calling-out mode of a user on each phase at each moment according to a difference value between the total current value of each phase at each moment and the ideal current value of each phase;
it should be noted that, according to the difference between the total current value and the ideal current value in each phase, the method and the device can match the users who are adjusted to be close to balance through an approximation algorithm, and determine the call-in and call-out mode of the users in each phase at each moment.
In a specific embodiment, when the difference is a negative value, it indicates that the total current value of each phase is less than the ideal current value of each phase, and a user needs to be called; when the difference value is a positive value, the total current value of each phase is larger than the ideal current value of each phase, and a user needs to be called out; when one phase needs to call out a user and the other two phases need to call in the user, screening out users with current values closest to the I difference of the phase sequence needing to be called in the phase sequence needing to be called out, and recording the adjustment modes of the screened users; when two phases need to call users and the other phase needs to call users, screening users with current values closest to the I difference of the phase sequence needing to be called out from the phase sequences of the two users needing to be called out, and recording the adjustment modes of the screened users; and when one phase needs to be called out, one phase needs to be called in and the other phase does not need to be operated, selecting the user with the current value closest to the I difference of the phase sequence needing to be called in from the phase sequence needing to be called out, and recording the adjustment mode of the screened user.
It should be noted that, the total current of A, B, C three phases at the first time point of the peak and the ideal current at the corresponding time point can be calculated by using the ideal current value corresponding to the user data and the phase sequence of the user in the data set at the first time point of the peak; for example, the total A-phase current I can be obtained by adding all A-phase user currentsAComparing with the ideal current value I to obtain the difference value IDifference of AThe negative value represents the total current I of phase AALess than ideal current value I, needing to be called into user, otherwise, representing total current I of A phaseAIf the current value is larger than the ideal current value I, the user needs to be called out; the same applies to phase B and phase C.
For calling out from needIn the phase sequence of the user (assumed as B phase), the phase sequence difference value (assumed as I) with the current absolute value closest to the user to be called is screened outDifference of A) The user (xx) outputs the adjustment information (the adjustment of the user is adjusted from the phase B to the phase A, and the adjustment times are marked as 1);
and repeating the steps to obtain the user adjustment information of the second time point in the peak time period, outputting the adjustment information (xx user adjustment is adjusted from the phase B to the phase A, marking the adjustment times 2), and circularly calculating the user adjustment information of all the time points in the peak time period.
Step 106, counting the calling-in and calling-out modes of all the users at each moment, and counting the users needing the most times of adjustment;
it should be noted that, according to the user adjustment information at all time points in the peak time period, the user in which the adjustment times are the most, that is, the user having the greatest influence on the three-phase imbalance, may be determined.
Step 107, correspondingly adjusting the user with the most number of times of adjustment and calculating the three-phase current value after the user is adjusted, if the three-phase current value after the user is adjusted does not accord with the preset three-phase balance degree standard, repeatedly executing the step 105 and the step 107 until the adjusted three-phase current accords with the preset three-phase balance degree standard;
it should be noted that, after obtaining the user requiring the most adjustment times, the three-phase total current value and the ideal current value after adjusting the user may be calculated, and the three-phase imbalance degree may be calculated according to the obtained three-phase total current value and the ideal current value. The standard requirement of the power grid on the three-phase unbalance can be defined as that the three-phase unbalance of the low-voltage transformer area is not more than 15%. If the three-phase unbalance degree is larger than the preset three-phase unbalance degree, repeating the steps 105 to 107, and reselecting the user needing to be adjusted until the calculated three-phase unbalance degree loads the preset three-phase unbalance degree standard.
And 108, correspondingly adjusting each phase user according to the user adjustment mode meeting the preset three-phase balance standard.
It should be noted that, because each transformer platform area user is basically hundreds of users, according to the method of the present application, the user who accords with the preset three-phase balance degree standard is adjusted, and the adjustment is accurate to each user, and after one-time adjustment, unless the power consumption of the user is changed greatly, the long-time three-phase unbalance degree can be basically ensured to meet the power grid standard. Compared with the current of each branch line (several to tens of users supplied with power by the branch line) measured by manually ascending the height, the current measuring device cannot obtain all branch currents at the same time point, only can roughly regard the branch currents for a short time as the time and labor waste at the same time point, has the risks of electric shock, high-altitude falling and the like, and has obvious advantages of solving the existing problems.
According to the method, the difference value between each phase current value and an ideal current value at each moment is calculated by determining the voltage and current data of the user side and the total load data of the distribution transformer load terminal, users needing to be called in and out are determined according to the difference value, the proportion of the users to the three-phase imbalance influence is judged, and infinite approximation to three-phase balance is achieved through multiple times of calculation, so that the adjustment user information is output to low-voltage operation and maintenance personnel, the three-phase imbalance after adjustment can be greatly improved, and the dynamic balance of the three-phase load is achieved.
The present application further provides an embodiment of an apparatus for treating three-phase imbalance of a platform area, as shown in fig. 2, where fig. 2 includes:
the acquisition unit 201 is used for acquiring voltage and current data of a user ammeter in a transformer area and the total load of a public distribution transformer load terminal at regular time;
a determining unit 202, configured to determine voltage and current data of users on each phase at each time and a total load of a public distribution load terminal;
an ideal current determining unit 203, configured to divide the total load of the public distribution transformer load terminal by 3 to obtain an ideal load value of each phase at each time, and divide the ideal load value by the phase voltage of each phase to obtain an ideal current value of each phase;
a difference calculating unit 204 for calculating a total current value of each phase according to the current values of all the user meters on each phase, and calculating a difference I between the total current value of each phase and an ideal current value of each phaseDifference (D)；
An adjustment mode determining unit 205, configured to determine a call-in/call-out mode of a user on each phase at each time according to a difference between the total current value of each phase at each time and the ideal current value of each phase;
a counting unit 206, configured to count the call-in and call-out modes of each phase user at each time, and count the users requiring the most adjustment times;
the standard comparison unit 207 is used for correspondingly adjusting the user with the most times of adjustment and calculating the three-phase current value after the user is adjusted, and if the three-phase current value after the user is adjusted does not accord with the preset three-phase balance standard, the steps of the adjustment mode determining unit, the counting unit and the standard comparison unit are repeatedly executed until the adjusted three-phase current accords with the preset three-phase balance standard;
the adjusting unit 208 is configured to correspondingly adjust each phase user according to a user adjustment mode meeting a preset three-phase balance standard.
In a specific embodiment, the statistical unit is specifically configured to count call-in and call-out manners of each phase of user at each moment of the peak time period, and count the user requiring the most adjustment times.
In a specific embodiment, the method further comprises the following steps:
and the user identification unit is used for respectively transmitting high-frequency pulse signals to the ABC three phases, identifying the phase of each user by detecting the pulse signals of the user electric meters, and outputting A, B, C user electric meter numbers corresponding to the three phases.
In a specific embodiment, the adjustment mode determining unit further includes:
the first adjusting unit is used for screening out users with current values closest to the I difference of the phase sequence to be called in from the phase sequence of the users to be called out when one phase needs to call out the users and the other two phases need to call in the users, and recording the adjusting modes of the screened users;
the second adjusting unit is used for screening out users with current values closest to the I difference of the phase sequence to be called out from the phase sequences of the two users to be called out when the two users to be called out and the other user to be called in, and recording the adjusting modes of the screened users;
and the third adjusting unit is used for selecting the user with the current value closest to the I difference of the phase sequence needing to be called from the phase sequence needing to be called when one phase needs to be called out, one phase needs to be called in and the other phase does not need to be operated, and recording the adjusting mode of the screened user.
The application further provides an embodiment of an apparatus for treating three-phase imbalance of a platform area, as shown in fig. 3, where fig. 3 includes a processor and a memory: the memory is used for storing the program codes and transmitting the program codes to the processor; the processor is used for executing the method for treating the three-phase unbalance of the platform area according to the instructions in the program codes.
The present application further provides a computer-readable storage medium for storing program code for performing the method of managing a three-phase imbalance of a platform area of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The terms "first," "second," "third," "fourth," and the like in the description of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit 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 may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes 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.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (9)

1. A method for treating three-phase unbalance of a platform area is characterized by comprising the following steps:
step 101, acquiring voltage and current data of a user electric meter in a transformer area at regular time and a total load of a public distribution transformer load terminal;
step 102, determining voltage and current data of users on each phase at each moment and total load of the public distribution transformer load terminal;
103, dividing the total load of the public distribution transformer load terminal by 3 to obtain an ideal load value of each phase at each moment, and dividing the ideal load value by the phase voltage of each phase to obtain an ideal current value of each phase;
104, calculating the total current value of each phase according to the current values of all the user electric meters on each phase, and calculating the difference value I between the total current value of each phase and the ideal current value of each phaseDifference (D)；
105, determining a calling-in and calling-out mode of a user on each phase at each moment according to a difference value between the total current value of each phase at each moment and the ideal current value of each phase; the method specifically comprises the following steps: comparing the difference between the total current value of each phase and the ideal current value of each phase, when the difference is a positive value, indicating that the total current value of each phase is greater than the ideal current value of each phase, and calling out a user, and when the difference is a negative value, indicating that the total current value of each phase is less than the ideal current value of each phase, and calling in the user;
step 106, counting the calling-in and calling-out modes of all the users at each moment, and counting the users needing the most times of adjustment;
step 107, correspondingly adjusting the user with the most number of times of adjustment, specifically: calling the user with the most times of adjustment to the phase to be called; calculating the three-phase current value after the user is adjusted, and if the three-phase current value after the user is adjusted does not accord with the preset three-phase balance degree standard, repeatedly executing the step 105 and the step 107 until the adjusted three-phase current accords with the preset three-phase balance degree standard;
and 108, correspondingly adjusting each phase user according to a user adjustment mode meeting the preset three-phase balance degree standard, wherein each phase user is specifically one or more users needing the most adjustment times.
2. The method for governing three-phase imbalance of a distribution room according to claim 1, wherein the statistics of the call-in and call-out modes of users of each phase at each moment is performed to count the users requiring the most adjustment times, and specifically comprises:
and (4) counting the calling-in and calling-out modes of all the users at each moment in the peak time period, and counting the users needing the most adjustment times.
3. The method of remediating three-phase imbalance of a staging area of claim 1, further comprising:
and respectively transmitting high-frequency pulse signals to the ABC three phases, identifying the phase of each user by detecting the pulse signals of the user electric meters, and outputting A, B, C user electric meter numbers corresponding to the three phases.
4. The method for governing three-phase imbalance of a platform area according to claim 1, wherein the method for determining the call-in and call-out mode of the user on each phase according to the difference between the total current value of each phase and the ideal current value of each phase at each moment specifically comprises:
when the difference value is a negative value, the total current value of each phase is smaller than the ideal current value of each phase, and a user needs to be called; when the difference value is a positive value, the total current value of each phase is larger than the ideal current value of each phase, and a user needs to be called out;
when one phase needs to call out the user and the other two phases need to call in the user, screening the I with the current value closest to the phase sequence needing to be called in from the phase sequence needing to call out the userDifference (D)Recording the adjustment mode of the screened user;
when two phases need to call out users and the other phase needs to call in users, I with the current value closest to the phase sequence needing to be called out is screened from the phase sequences of the two users needing to be called outDifference (D)Recording the adjustment mode of the screened user;
when one phase needs to be called out, one phase needs to be called in and the other phase does not need to be operated, selecting I with the current value closest to the phase sequence needing to be called in from the phase sequence needing to be called outDifference (D)And (4) recording the adjustment modes of the screened users.
5. An apparatus for treating three-phase imbalance in a platform area, comprising:
the acquisition unit is used for acquiring voltage and current data of the user electric meters in the distribution area and the total load of the public distribution transformer load terminal at regular time;
the determining unit is used for determining the voltage and current data of users on each phase at each moment and the total load of the public distribution transformer load terminal;
the ideal current determining unit is used for dividing the total load of the public distribution transformer load terminal by 3 to obtain an ideal load value of each phase at each moment, and dividing the ideal load value by the phase voltage of each phase to obtain an ideal current value of each phase;
a difference value calculating unit for calculating the total current value of each phase according to the current values of all the user electric meters on each phase, and calculating the difference value I between the total current value of each phase and the ideal current value of each phaseDifference (D)；
The adjustment mode determining unit is used for determining the calling-in and calling-out mode of the user on each phase at each moment according to the difference value between the total current value of each phase at each moment and the ideal current value of each phase; the method specifically comprises the following steps: comparing the difference between the total current value of each phase and the ideal current value of each phase, when the difference is a positive value, indicating that the total current value of each phase is greater than the ideal current value of each phase, and calling out a user, and when the difference is a negative value, indicating that the total current value of each phase is less than the ideal current value of each phase, and calling in the user;
the statistical unit is used for counting the calling-in and calling-out modes of all the users at each moment and counting the users needing the most times of adjustment;
a standard comparison unit, configured to correspondingly adjust the user with the largest number of times to be adjusted, specifically: calling the user with the most times of adjustment to the phase to be called; calculating a three-phase current value after the user is adjusted, and if the three-phase current value after the user is adjusted does not accord with the preset three-phase balance standard, repeatedly executing the steps of the adjusting mode determining unit, the counting unit and the standard comparing unit until the adjusted three-phase current accords with the preset three-phase balance standard;
and the adjusting unit is used for correspondingly adjusting each phase user according to a user adjusting mode meeting the standard of the preset three-phase balance degree, wherein each phase user is specifically one or more users needing the most adjusting times.
6. The apparatus for governing three-phase imbalance of a distribution room of claim 5, wherein the statistic unit is specifically configured to count the call-in and call-out modes of each phase of users at each moment of the peak time period, and count the users requiring the most adjustment times.
7. The apparatus for governing three-phase imbalance of a platform area of claim 5, further comprising:
and the user identification unit is used for respectively transmitting high-frequency pulse signals to the ABC three phases, identifying the phase of each user by detecting the pulse signals of the user electric meters, and outputting A, B, C user electric meter numbers corresponding to the three phases.
8. The apparatus for treating three-phase imbalance of a platform area of claim 5, wherein the adjustment manner determining unit further comprises:
a first adjusting unit, for screening the I with the current value closest to the phase sequence to be called out from the phase sequence to be called out when one phase needs to be called out and the other two phases need to be called inDifference (D)Recording the adjustment mode of the screened user;
a second adjusting unit, for screening out the I with the current value closest to the phase sequence to be called out from the two phase sequences to be called out when two phases need to call out the user and the other phase needs to call in the userDifference (D)Recording the adjustment mode of the screened user;
a third adjusting unit for selecting I with current value closest to the phase sequence to be called out from the phase sequence to be called out when one phase needs to be called out, one phase needs to be called in and the other phase does not need to be operatedDifference (D)And (4) recording the adjustment modes of the screened users.
9. An apparatus for remediating three-phase imbalance in a platform area, the apparatus comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the method of treating a three-phase imbalance of a plant area of any one of claims 1-4 according to instructions in the program code.
CN202111000350.4A 2021-08-30 2021-08-30 Method, device, equipment and medium for governing three-phase unbalance of transformer area Active CN113452043B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101179197A (en) * 2007-12-03 2008-05-14 黑龙江中星科技股份有限公司 Three-phase load automatic equalization device of power distribution network
CN104659797A (en) * 2015-02-10 2015-05-27 卢松 Intelligent power load three-phase unbalance handling method at distribution network low voltage side
CN105226684A (en) * 2015-09-29 2016-01-06 国电南瑞科技股份有限公司 A kind of low voltage electric network three-phase imbalance control method based on phase-change switch
CN106684895A (en) * 2017-01-11 2017-05-17 南京工程学院 Three-phase unbalance management method and commutation system based on active power unbalanced automatic phase change control strategy

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7884278B2 (en) * 2007-11-02 2011-02-08 Tigo Energy, Inc. Apparatuses and methods to reduce safety risks associated with photovoltaic systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101179197A (en) * 2007-12-03 2008-05-14 黑龙江中星科技股份有限公司 Three-phase load automatic equalization device of power distribution network
CN104659797A (en) * 2015-02-10 2015-05-27 卢松 Intelligent power load three-phase unbalance handling method at distribution network low voltage side
CN105226684A (en) * 2015-09-29 2016-01-06 国电南瑞科技股份有限公司 A kind of low voltage electric network three-phase imbalance control method based on phase-change switch
CN106684895A (en) * 2017-01-11 2017-05-17 南京工程学院 Three-phase unbalance management method and commutation system based on active power unbalanced automatic phase change control strategy

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
基于有效值的台区电流不平衡度计算方法研究;艾精文等;《电测与仪表》;20200610;第57卷(第11期);第30-36页 *

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