CN109031041B - Distribution network voltage monitoring device point distribution method and system - Google Patents
Distribution network voltage monitoring device point distribution method and system Download PDFInfo
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- CN109031041B CN109031041B CN201810736621.4A CN201810736621A CN109031041B CN 109031041 B CN109031041 B CN 109031041B CN 201810736621 A CN201810736621 A CN 201810736621A CN 109031041 B CN109031041 B CN 109031041B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
Abstract
The invention relates to a distribution network voltage monitoring device point distribution method and a distribution network voltage monitoring device point distribution system, comprising the following steps: carrying out load partitioning on the power distribution network according to load conditions to obtain a plurality of load areas; configuring a voltage monitoring point at the tail end of each load area as an initial point distribution scheme of the voltage monitoring device; calculating the maximum voltage estimation deviation of the initial point distribution scheme, and when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint, adding a voltage monitoring point at the maximum voltage estimation deviation until a revised point distribution scheme that the maximum voltage estimation deviation meets the voltage estimation deviation constraint is obtained; and sequencing the importance degrees of the voltage monitoring points in the revised point distribution scheme, and sequentially removing the voltage monitoring points from the position with the lowest importance degree until a target point distribution scheme which meets the voltage estimation deviation constraint and has the minimum point distribution is obtained. Therefore, on the basis of guaranteeing the voltage estimation precision, the voltage monitoring point distribution scheme with the minimum point distribution positions can be obtained rapidly, and point distribution basis is provided for power distribution network voltage monitoring.
Description
Technical Field
The invention relates to the field of power distribution network voltage monitoring, in particular to a distribution network voltage monitoring device point distribution method and system.
Background
The real-time monitoring of the power grid voltage is a precondition for managing the voltage quality problem of the power distribution network, and the configuration cost is very expensive although the real-time voltage distribution can be accurately obtained by configuring the voltage monitoring device for each voltage node. In consideration of the correlation of the same feeder voltage, voltage monitoring points can be reduced appropriately, and then the voltage distribution of the whole network is estimated according to a plurality of voltage monitoring data by using a power system state estimation method.
The estimated grid voltage is inaccurate due to the fact that the voltage monitoring points of the power distribution network are too few, and redundant waste is caused due to the fact that the voltage monitoring points are too many, and therefore the voltage monitoring devices are reasonably configured, namely the whole-grid voltage monitoring meeting error requirements is achieved through the minimum monitoring devices, and the method has important significance in reducing equipment investment and improving economic benefits of a power system. At present, an optimal point distribution scheme of the voltage monitoring device is obtained by a traversing method, but the nodes of the urban power distribution network are more, the time required for traversing all the point distribution schemes is long, and the calculation process is complex. Thus, there is a need to develop a fast and effective voltage monitoring device distribution method.
Disclosure of Invention
Based on this, it is necessary to provide a distribution network voltage monitoring device distribution method and system.
A distribution network voltage monitoring device distribution method, comprising: carrying out load partitioning on the power distribution network according to load conditions to obtain a plurality of load areas; configuring a voltage monitoring point at the tail end of each load area as an initial point distribution scheme of the voltage monitoring device; calculating the maximum voltage estimation deviation of the initial point distribution scheme, and when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint, adding a voltage monitoring point at the maximum voltage estimation deviation until a revised point distribution scheme that the maximum voltage estimation deviation meets the voltage estimation deviation constraint is obtained; and sequencing the importance degrees of the voltage monitoring points in the revised point distribution scheme, and sequentially removing the voltage monitoring points from the position with the lowest importance degree until a target point distribution scheme which meets the voltage estimation deviation constraint and has the minimum point distribution is obtained.
According to the distribution point method of the distribution network voltage monitoring device, the distribution point position of the distribution point scheme is continuously optimized through calculating the maximum voltage estimation deviation, and the target distribution point scheme which meets the constraint of the voltage estimation deviation and is minimum in distribution point is obtained, so that the distribution network voltage monitoring device can be reasonably configured, the voltage monitoring distribution point scheme with the minimum distribution point position can be rapidly obtained on the basis of guaranteeing the voltage estimation accuracy, the distribution point basis is provided for the distribution network voltage monitoring, and the management of the distribution network voltage quality problem is facilitated.
In one embodiment, the load partitioning of the power distribution network according to the load condition includes: and carrying out load partition on the power distribution network according to the load condition and according to the principle of load distribution balance among all load areas.
In one embodiment, the voltage monitoring points are sequentially removed from the position with the lowest importance level until a target point distribution scheme which meets the voltage estimation deviation constraint and has the minimum point distribution is obtained, and the method comprises the following steps: and sequentially eliminating voltage monitoring points from the position with the lowest importance degree, calculating the maximum voltage estimation deviation after eliminating the voltage monitoring points, and taking a point distribution scheme before eliminating the last voltage monitoring point as the target point distribution scheme when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint.
In one embodiment, after calculating the maximum voltage estimation deviation after eliminating the voltage monitoring points, when the maximum voltage estimation deviation meets the voltage estimation deviation constraint, eliminating the voltage monitoring points from the position with the lowest importance level is continued.
In one embodiment, ranking the importance of each voltage monitoring point in the revised setpoint placement scheme includes: and updating the voltage estimation deviation of the point distribution scheme after eliminating a certain voltage monitoring point according to the voltage estimation deviation of the revised point distribution scheme to obtain the importance degree of the voltage monitoring point on the voltage estimation deviation of the revised point distribution scheme, and then sequencing each voltage monitoring point in the revised point distribution scheme according to the importance degree.
In one embodiment, the greater the voltage estimation deviation of the updated point distribution scheme after a certain voltage monitoring point is removed, the higher the importance of the voltage monitoring point to the voltage estimation deviation of the revised point distribution scheme.
In one embodiment, the distribution network voltage monitoring device point distribution method further includes: and outputting the target point distribution scheme.
In one embodiment, the target point distribution scheme is output to a target terminal.
In one embodiment, the distribution network voltage monitoring device point distribution method further includes: and designing or adjusting each voltage monitoring point according to the target point distribution scheme.
The utility model provides a distribution network voltage monitoring device distribution system, its adoption arbitrary the distribution network voltage monitoring device distribution method of above-mentioned realizes.
According to the distribution point system of the distribution network voltage monitoring device, the distribution point position of the distribution point scheme is continuously optimized through calculating the maximum voltage estimation deviation, and the target distribution point scheme which meets the constraint of the voltage estimation deviation and is minimum in distribution point is obtained, so that the distribution network voltage monitoring device can be reasonably configured, the voltage monitoring distribution point scheme with the minimum distribution point position can be rapidly obtained on the basis of guaranteeing the voltage estimation precision, the distribution point basis is provided for the distribution network voltage monitoring, and the management of the distribution network voltage quality problem is facilitated.
Drawings
Fig. 1 is a schematic flow chart of a distribution network voltage monitoring device distribution method according to an embodiment of the invention.
Fig. 2 is a schematic diagram of load partitioning of a power distribution network according to another embodiment of the present invention.
Fig. 3 is a schematic flow chart of a distribution network voltage monitoring device according to another embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, a distribution network voltage monitoring device distribution method includes: carrying out load partitioning on the power distribution network according to load conditions to obtain a plurality of load areas; configuring a voltage monitoring point at the tail end of each load area as an initial point distribution scheme of the voltage monitoring device; calculating the maximum voltage estimation deviation of the initial point distribution scheme, and when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint, adding a voltage monitoring point at the maximum voltage estimation deviation until a revised point distribution scheme that the maximum voltage estimation deviation meets the voltage estimation deviation constraint is obtained; and sequencing the importance degrees of the voltage monitoring points in the revised point distribution scheme, and sequentially removing the voltage monitoring points from the position with the lowest importance degree until a target point distribution scheme which meets the voltage estimation deviation constraint and has the minimum point distribution is obtained. According to the distribution point method of the distribution network voltage monitoring device, the distribution point position of the distribution point scheme is continuously optimized through calculating the maximum voltage estimation deviation, and the target distribution point scheme which meets the constraint of the voltage estimation deviation and is minimum in distribution point is obtained, so that the distribution network voltage monitoring device can be reasonably configured, the voltage monitoring distribution point scheme with the minimum distribution point position can be rapidly obtained on the basis of guaranteeing the voltage estimation accuracy, the distribution point basis is provided for the distribution network voltage monitoring, and the management of the distribution network voltage quality problem is facilitated.
In one embodiment, the load partitioning of the power distribution network according to the load condition includes: and carrying out load partition on the power distribution network according to the load condition and according to the principle of load distribution balance among all load areas. Further, load is distributed to the power distribution network according to the load condition, and the power distribution network is subjected to load partition according to the position and distribution of the power distribution network and the principle of load distribution balance among target load areas of the power distribution network. Thus, the load distribution balance of each load area is realized in the initial point distribution scheme, so that the balanced distribution is realized for each voltage monitoring point of the initial point distribution scheme, the maximum voltage estimation deviation of the initial point distribution scheme in the subsequent step can be ensured to fall in a normal range, and the calculation efficiency of the subsequent revised point distribution scheme and the calculation efficiency of the target point distribution scheme can be further improved. In one embodiment, a method for distributing a power distribution network voltage monitoring device includes: according to load conditions, carrying out load partition on the power distribution network according to the principle of load distribution balance among all load areas to obtain a plurality of load areas; configuring a voltage monitoring point at the tail end of each load area as an initial point distribution scheme of the voltage monitoring device; calculating the maximum voltage estimation deviation of the initial point distribution scheme, and when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint, adding a voltage monitoring point at the maximum voltage estimation deviation until a revised point distribution scheme that the maximum voltage estimation deviation meets the voltage estimation deviation constraint is obtained; and sequencing the importance degrees of the voltage monitoring points in the revised point distribution scheme, and sequentially removing the voltage monitoring points from the position with the lowest importance degree until a target point distribution scheme which meets the voltage estimation deviation constraint and has the minimum point distribution is obtained. The remaining embodiments and so on.
Further, in one embodiment, calculating the maximum voltage estimate bias for the initial placement scheme includes: and estimating the whole network voltage distribution according to the voltage monitoring data and the power system state estimation method, and calculating the maximum voltage estimation deviation of the initial point distribution scheme. Further, calculating a maximum voltage estimated deviation of the initial placement scheme includes: according to the voltage monitoring data and the power system state estimation method, the whole network voltage distribution is estimated, the maximum voltage estimation deviation of the initial point distribution scheme is calculated, and the initial point distribution scheme is checked according to the voltage estimation deviation constraint. Further, when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint, a voltage monitoring point is newly added at the maximum voltage estimation deviation until a revised point distribution scheme that the maximum voltage estimation deviation meets the voltage estimation deviation constraint is obtained, including: and (3) carrying out scheme adjustment on the point distribution scheme which does not meet the voltage estimation deviation constraint, adding voltage monitoring points at the maximum voltage estimation deviation, re-calculating and checking the maximum voltage estimation deviation of the point distribution scheme after adjustment, continuing adjustment if the voltage estimation deviation constraint is not met, and obtaining a revised point distribution scheme which meets the voltage estimation deviation constraint if the voltage estimation deviation constraint is met.
In one embodiment, the voltage monitoring points are sequentially removed from the position with the lowest importance level until a target point distribution scheme which meets the voltage estimation deviation constraint and has the minimum point distribution is obtained, and the method comprises the following steps: and sequentially eliminating voltage monitoring points from the position with the lowest importance degree, calculating the maximum voltage estimation deviation after eliminating the voltage monitoring points, and taking a point distribution scheme before eliminating the last voltage monitoring point as the target point distribution scheme when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint. In one embodiment, after calculating the maximum voltage estimation deviation after eliminating the voltage monitoring points, when the maximum voltage estimation deviation meets the voltage estimation deviation constraint, eliminating the voltage monitoring points from the position with the lowest importance level is continued. Further, the voltage monitoring points are continuously removed from the position with the lowest importance level, the method comprises the steps of calculating the maximum voltage estimation deviation after the voltage monitoring points are removed, removing the current voltage monitoring point when the maximum voltage estimation deviation meets the voltage estimation deviation constraint, returning to continuously execute the calculation of the maximum voltage estimation deviation after the voltage monitoring points are removed, and taking the point distribution scheme before the last voltage monitoring point is removed as the target point distribution scheme when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint. Further, the voltage monitoring points are sequentially removed from the position with the lowest importance level until a target point distribution scheme which meets the voltage estimation deviation constraint and has the minimum point distribution is obtained, and the method comprises the following steps: and sequentially eliminating voltage monitoring points from the position with the lowest importance degree, calculating the maximum voltage estimation deviation after eliminating the voltage monitoring points, judging whether the maximum voltage estimation deviation meets the voltage estimation deviation constraint, continuously eliminating the voltage monitoring points from the position with the lowest importance degree when the maximum voltage estimation deviation meets the voltage estimation deviation constraint, and taking a point distribution scheme before eliminating the last voltage monitoring point as the target point distribution scheme when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint. Therefore, on one hand, whether the voltage monitoring points need to be reserved or not can be rapidly determined through calculation, on the other hand, a target point distribution scheme can be obtained when the maximum voltage estimation deviation is not met, the voltage monitoring point distribution scheme with the minimum point distribution position can be rapidly obtained on the basis of guaranteeing the voltage estimation accuracy, point distribution basis is provided for power distribution network voltage monitoring, and the management of the power distribution network voltage quality problem is facilitated. In one embodiment, a method for distributing a power distribution network voltage monitoring device includes: according to load conditions, carrying out load partition on the power distribution network according to the principle of load distribution balance among all load areas to obtain a plurality of load areas; configuring a voltage monitoring point at the tail end of each load area as an initial point distribution scheme of the voltage monitoring device; calculating the maximum voltage estimation deviation of the initial point distribution scheme, and when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint, adding a voltage monitoring point at the maximum voltage estimation deviation until a revised point distribution scheme that the maximum voltage estimation deviation meets the voltage estimation deviation constraint is obtained; and sorting the importance degrees of the voltage monitoring points in the revised point distribution scheme, sequentially removing the voltage monitoring points from the position with the lowest importance degree, calculating the maximum voltage estimation deviation after removing the voltage monitoring points, judging whether the maximum voltage estimation deviation meets the voltage estimation deviation constraint, continuously removing the voltage monitoring points from the position with the lowest importance degree when the maximum voltage estimation deviation meets the voltage estimation deviation constraint, and taking the point distribution scheme before removing the last voltage monitoring point as the target point distribution scheme when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint. The remaining embodiments and so on.
In one embodiment, ranking the importance of each voltage monitoring point in the revised setpoint placement scheme includes: and updating the voltage estimation deviation of the point distribution scheme after eliminating a certain voltage monitoring point according to the voltage estimation deviation of the revised point distribution scheme to obtain the importance degree of the voltage monitoring point on the voltage estimation deviation of the revised point distribution scheme, and then sequencing each voltage monitoring point in the revised point distribution scheme according to the importance degree. In one embodiment, the greater the voltage estimation deviation of the updated point distribution scheme after a certain voltage monitoring point is removed, the higher the importance of the voltage monitoring point to the voltage estimation deviation of the revised point distribution scheme. Therefore, the function of the voltage monitoring points can be simply and directly reflected, and the sequence of calculation is determined, so that the target point distribution scheme is rapidly and effectively determined. The update distribution scheme is an update scheme of the revision distribution scheme, and may also be referred to as an update revision distribution scheme.
In one embodiment, the distribution network voltage monitoring device point distribution method further includes: and outputting the target point distribution scheme. In one embodiment, the target point distribution scheme is output to a target terminal. In one embodiment, the target terminal includes an administrator mobile terminal or a computer terminal, etc. Therefore, the target point distribution scheme can be conveniently notified to the manager, and effective management is realized. In one embodiment, the distribution network voltage monitoring device point distribution method further includes: and designing or adjusting each voltage monitoring point according to the target point distribution scheme. Therefore, the distribution network voltage monitoring device distribution scheme, namely the target distribution scheme, can be conveniently obtained through the method, and then distribution network voltage monitoring device distribution is realized according to the target distribution scheme.
In one embodiment, the distribution network voltage monitoring device distribution method includes: carrying out load partition on the power distribution network according to load conditions, and configuring a voltage monitoring point at the tail end of each load area as an initial point distribution scheme Z of a voltage monitoring device 0 The method comprises the steps of carrying out a first treatment on the surface of the Calculating an initial point distribution scheme Z 0 For the point arrangement scheme which does not meet the voltage estimation deviation constraint, voltage monitoring points are newly added at the position of the maximum voltage estimation deviation until a revised point arrangement scheme Z meeting the voltage estimation deviation constraint is obtained 1 The method comprises the steps of carrying out a first treatment on the surface of the For revision point arrangement scheme Z 1 The importance degree of each voltage monitoring point is ordered, and the voltage monitoring points are sequentially removed from the position with the lowest importance degree until a target point distribution scheme Z which meets the voltage estimation deviation constraint and has the minimum point distribution is obtained. Therefore, on the basis of guaranteeing the voltage estimation precision, the voltage monitoring point distribution scheme with the minimum point distribution position can be obtained rapidly, point distribution basis is provided for voltage monitoring of the power distribution network, and the management of the voltage quality problem of the power distribution network is facilitated.
In one embodiment, a distribution network voltage monitoring device distribution method includes some or all of the following steps.
S1, referring to FIG. 2, carrying out load partition on a power distribution network according to load conditions and the principle of load distribution balance among all areas, and then configuring a voltage monitoring point at the tail end of each load area, thereby obtaining an initial point distribution scheme Z of the voltage monitoring device 0 。
S2, referring to FIG. 3, according to the voltage monitoring data and the power system state estimation method, estimating the voltage distribution of the whole network, and calculating an initial point distribution scheme Z 0 Maximum voltage estimated deviation of (2)The initial setpoint solution is then checked according to a voltage estimation bias constraint, which in one embodiment is:
in the method, in the process of the invention,estimating a deviation for the setpoint voltage to be checked, < >>Deviation of maximum voltage estimation acceptable to voltage quality problem management equipment. The point setting scheme to be checked comprises an initial point setting scheme, a revised point setting scheme, an updated point setting scheme and/or a target point setting scheme.
Carrying out scheme adjustment on the point distribution scheme which does not meet the voltage estimation deviation constraint, newly adding voltage monitoring points at the maximum voltage estimation deviation, re-calculating and checking the maximum voltage estimation deviation of the point distribution scheme after adjustment, continuously adjusting if the voltage estimation deviation constraint is not met, and obtaining a revised point distribution scheme Z which meets the voltage estimation deviation constraint if the voltage estimation deviation constraint is met 1 。
S3, see FIG. 3, for revision point placement scheme Z 1 The importance degree of each voltage monitoring point is ordered, and the specific steps are as follows:
1) Revision point scheme Z 1 In the method, a voltage monitoring point k is removed, the rest voltage monitoring points are reserved, and the voltage estimation deviation of a point distribution scheme after the voltage monitoring point k is removed is calculatedWhere k=1, 2, …, n, n is the revised setpoint approach Z 1 The number of the points is distributed.
2) According to revision point arrangement scheme Z 1 Voltage estimation deviation of (2)And the voltage estimation deviation of the point distribution scheme after eliminating the voltage monitoring point k +.>Obtaining a voltage monitoring point k to revised point distribution scheme Z 1 The voltage estimation bias contribution of (2) is:
3) According toWill revise the point arrangement scheme Z 1 The medium voltage monitoring points are ordered from low to high according to importance degree, wherein +.>The larger the voltage monitoring point, the higher the importance of the voltage monitoring point. Likewise, it is also possible to use the formula +.>Will revise the point arrangement scheme Z 1 The medium voltage monitoring points are ordered from high to low according to importance degrees. Therefore, the importance degree of each voltage monitoring point in the revised point distribution scheme is ordered.
In the opposite revision point arrangement scheme Z 1 After the importance degree ordering of each voltage monitoring point, the voltage monitoring points are removed one by one from the point distribution position with the lowest importance degree, the maximum voltage estimation deviation of the point distribution scheme after the voltage monitoring points are removed is recalculated and checked, if the voltage estimation deviation constraint is met, the point distribution scheme is continuously removed, and if the voltage estimation deviation constraint is not met, the point distribution scheme before the removal is the target point distribution scheme Z which meets the voltage estimation deviation constraint and has the minimum point distribution.
In one embodiment, as shown in fig. 3, a distribution network voltage monitoring device distribution method includes the following steps.
S10, partitioning a power distribution network; carrying out load partition on the power distribution network according to load conditions to obtain a plurality of load areas;
s20, giving an initial point distribution scheme; namely, configuring a voltage monitoring point at the tail end of each load area as an initial point distribution scheme of the voltage monitoring device;
s30, calculating maximum voltage estimation deviationThis step calculates the maximum voltage estimated bias of the initial point placement schemeDifference (S)>
S40, judging whether there isIf yes, executing S50, otherwise executing S60;
s50, a voltage monitoring device is newly added at the maximum voltage estimation deviation, namely a voltage monitoring point is newly added at the maximum voltage estimation deviation, and S30 is executed in a return mode;
s60, sorting importance degrees of the point distribution positions, namely sorting importance degrees of all voltage monitoring points in the revised point distribution scheme;
s70, eliminating voltage monitoring points with the lowest importance level;
s80, calculating maximum voltage estimation deviationCalculating and eliminating a voltage monitoring point and updating the voltage estimation deviation of the point distribution scheme;
s90, judging whether there isIf yes, executing S70, otherwise executing S100;
and S100, taking the voltage point distribution scheme before eliminating as a final voltage point distribution scheme, namely taking the point distribution scheme before eliminating the last voltage monitoring point as the target point distribution scheme.
Therefore, the distribution position of the distribution scheme is continuously optimized by calculating the maximum voltage estimation deviation, and the target distribution scheme which meets the voltage estimation deviation constraint and has the minimum distribution is obtained, so that the power distribution network voltage monitoring device can be reasonably configured, the voltage monitoring distribution scheme with the minimum distribution position can be rapidly obtained on the basis of ensuring the voltage estimation precision, the distribution basis is provided for power distribution network voltage monitoring, and the management of the power distribution network voltage quality problem is facilitated.
The invention provides a distribution network voltage monitoring device point distribution method, and a distribution network voltage monitoring device point distribution scheme can be obtained through the distribution network voltage monitoring device point distribution method. An embodiment is a distribution network voltage monitoring device point distribution system, which is implemented by adopting the distribution network voltage monitoring device point distribution method according to any one of the above embodiments. Further, the distribution network voltage monitoring device point distribution system comprises a power supply device, a man-machine operation interface device, a data acquisition device, a central processing unit and a display device; the power supply device is respectively connected with the man-machine operation interface device, the data acquisition device, the central processing unit and the display device; the central processing unit is respectively connected with the man-machine operation interface device, the data acquisition device and the display device; the data acquisition device is used for being connected with each voltage monitoring point of the power distribution network respectively. According to the distribution point system of the distribution network voltage monitoring device, the distribution point position of the distribution point scheme is continuously optimized through calculating the maximum voltage estimation deviation, and the target distribution point scheme which meets the constraint of the voltage estimation deviation and is minimum in distribution point is obtained, so that the distribution network voltage monitoring device can be reasonably configured, the voltage monitoring distribution point scheme with the minimum distribution point position can be rapidly obtained on the basis of guaranteeing the voltage estimation precision, the distribution point basis is provided for the distribution network voltage monitoring, and the management of the distribution network voltage quality problem is facilitated.
Further, in one embodiment, the human-machine interface device is configured to input a user command; in one embodiment, the user instruction is a point placement requirement, which may also be referred to as a user point placement requirement; further, the man-machine operation interface device is used for inputting a distribution point requirement, namely a distribution point requirement of the power distribution network voltage monitoring device, and the distribution point requirement can also be called a distribution point design requirement of the power distribution network voltage monitoring device. In one embodiment, the data acquisition device is used for respectively acquiring voltage signals of each voltage monitoring point of the power distribution network; in one embodiment, the central processor is configured to calculate a point distribution scheme of the voltage monitoring device that meets the voltage estimation accuracy and has the minimum point distribution position according to the point distribution requirement input by the man-machine operation interface device and the voltage signal of each voltage monitoring point collected by the data collecting device, and output the calculated point distribution scheme to the display device. Further, the central processing unit is provided with an accuracy estimation module, a point distribution calculation module and a scheme calculation module; the precision estimation module is used for calculating the distribution point of the voltage monitoring device meeting the voltage estimation precision according to the distribution point requirement input by the man-machine operation interface device and the voltage signals of each voltage monitoring point acquired by the data acquisition device and transmitting the distribution point to the scheme calculation module; the point distribution calculation module is used for calculating the point distribution of the voltage monitoring device with the minimum point distribution position according to the point distribution requirement input by the man-machine operation interface device and the voltage signals of each voltage monitoring point acquired by the data acquisition device and transmitting the point distribution to the scheme calculation module; the scheme calculation module is respectively connected with the precision estimation module, the point setting calculation module and the display device, and is used for calculating a point setting scheme of the voltage monitoring device which meets the voltage estimation precision and has the minimum point setting position according to the point setting of the voltage monitoring device which meets the voltage estimation precision and has the minimum point setting position, and outputting the point setting scheme to the display device. The voltage monitoring device point distribution scheme is a distribution network voltage monitoring device point distribution design scheme, and is simply called a point distribution scheme or design scheme. Further, the precision estimation module, the point distribution calculation module and the scheme calculation module are integrated and arranged as an arithmetic unit. Further, the central processing unit is also provided with a memory connected with the arithmetic unit, and the memory is used for storing user instructions and/or voltage signals of each voltage monitoring point acquired by the data acquisition device; further, the memory is used for storing the distribution network structure and the voltage distribution parameters, the user point distribution requirements and the point distribution scheme obtained by the arithmetic unit. Further, the central processing unit is further provided with a data processing chip connected with the arithmetic unit, and the data processing chip is used for receiving the text data input by the man-machine operation interface and transmitting the text data to the arithmetic unit. Further, the data processing chip is also used for extracting keywords in the text data and transmitting the keywords to the arithmetic unit. Further, the data processing chip is further configured to receive voice data input by the man-machine operation interface, convert the voice data into text data, and transmit the text data to the arithmetic unit.
In one embodiment, the human operator interface device includes a text operator interface device. In one embodiment, the text operation interface device comprises a mobile terminal, a handwriting pad and/or a keyboard. Thus, text input can be realized. In one embodiment, the human machine interface device comprises a voice operation interface device. In one embodiment, the voice operated interface device comprises a mobile terminal and/or a microphone. In this way, voice input can be achieved. In one embodiment, the man-machine interface device includes a text interface device and a voice interface device. In one embodiment, the text operation interface device is integrated with the voice operation interface device. In one embodiment, the human-machine interface device comprises a keyboard and/or a mobile phone. That is, the user can input the instruction by using the keyboard, or can directly use his mobile phone to realize the input instruction by using the input method or microphone on the mobile phone.
In one embodiment, the distribution network voltage monitoring device distribution system further comprises a sound output device connected with the central processing unit. In one embodiment, the sound output device is a sound box. Therefore, the calculation result of the distribution point design of the power distribution network voltage monitoring device can be output to the display device; the calculation result is a point distribution scheme, also called a point distribution design scheme, and the calculation result of the point distribution design of the power distribution network voltage monitoring device can be output to the sound output device, so that the dual output effect of images and sounds is realized. Further, the scheme calculating module is further connected with the sound output device, and the scheme calculating module is used for transmitting the voltage monitoring device point distribution scheme to the sound output device. Further, in one embodiment, the distribution network voltage monitoring device distribution system further includes a wireless output device connected to the central processing unit; the wireless output device is used for outputting the voltage monitoring device point distribution scheme to a target terminal. In one embodiment, the target terminal includes an administrator mobile terminal or a computer terminal, etc.
Further, the data acquisition device is also used for acquiring a power distribution network structure; or the man-machine operation interface is also used for inputting or importing a power distribution network structure; in one embodiment, the data acquisition device is provided with a plurality of acquisition ends, and each acquisition end is used for being connected with a voltage monitoring point of the power distribution network; in one embodiment, the collecting end is used for collecting the voltage parameter; in this way, the collection of a plurality of said collection terminals provides a voltage distribution parameter in the distribution network structure. In one embodiment, the data acquisition device is further provided with a load node module and a voltage distribution module, and the load node module and the voltage distribution module are respectively connected with the central processing unit. Further, in one embodiment, the load node module is configured to generate a load node admittance matrix according to the power distribution network structure and the voltage distribution parameters acquired by the acquisition ends and transmit the load node admittance matrix to the central processing unit, and the voltage distribution module is configured to generate a voltage distribution matrix according to the power distribution network structure and the voltage distribution parameters acquired by the acquisition ends and transmit the voltage distribution matrix to the central processing unit.
In one embodiment, the central processing unit comprises a data processing chip, an arithmetic unit and a memory; the data processing chip is respectively connected with the man-machine operation interface, the data acquisition device and the display device; the arithmetic unit is respectively connected with the data processing chip and the memory. In one embodiment, the data processing chip is configured to convert a user instruction input by the man-machine operation interface into operation data identifiable by the operator; in one embodiment, the calculator is configured to calculate a point distribution scheme of the voltage monitoring device that meets the voltage estimation accuracy and has the minimum point distribution position according to the point distribution requirement input by the man-machine operation interface device and the voltage signal of each voltage monitoring point collected by the data collecting device, and output the calculated point distribution scheme to the display device; in one embodiment, the memory is configured to store the point setting requirement input by the man-machine operation interface device, the voltage signal of each voltage monitoring point collected by the data collecting device, and the point setting scheme of the voltage monitoring device calculated by the arithmetic unit.
Further, in one embodiment, the display device sets a command preview interface and a result output interface; the command preview interface may also be referred to as a command preview interface display module, for displaying a control command input by a user, and the result output interface may also be referred to as a result output interface display module, for displaying a point setting result, that is, a point setting scheme, of the voltage monitoring device obtained by the central processor.
In one embodiment, a distribution network voltage monitoring device distribution system includes some or all of the following. The man-machine operation interface is used for inputting a control command by a user and sending the point distribution requirement of the user to the central processing unit; the data acquisition device is used for acquiring the structure and voltage distribution parameters of the power distribution network and sending the parameters to the central processing unit; the central processing unit is used for calculating a point distribution scheme of the voltage monitoring device which meets the voltage estimation precision and has the minimum point distribution position on the basis of the distribution network structure and the voltage distribution parameters provided by the data acquisition device and the point distribution requirements provided by the man-machine operation interface; the command preview interface is used for displaying control commands input by a user; and the result output interface is used for displaying the distribution result of the voltage monitoring device obtained by the central processing unit. According to the distribution network voltage monitoring device distribution system, on the basis of guaranteeing voltage estimation accuracy, the voltage monitoring distribution scheme with the minimum distribution position can be obtained rapidly, distribution basis is provided for voltage monitoring of the distribution network, and management of the distribution network voltage quality problem is facilitated.
In one embodiment, a distribution network voltage monitoring device distribution system includes a human-machine operation interface, a data acquisition device, a central processing unit, a command preview interface, and a result output interface. In one embodiment, the man-machine interface is used for inputting control commands by a user and sending the point distribution requirements of the user to the central processing unit. Includes a voice input section for inputting voice; or/and, the character input part is used for inputting characters, the voice input part can adopt a microphone, and the character input part can adopt a handwriting board or/and a keyboard. It is understood that other specific types of voice input devices, text input devices, and the like may be employed and remain within the scope of this invention. In one embodiment, the distribution requirements, i.e., user distribution requirements, include voltage estimation accuracy, voltage monitoring point candidate range, and/or installed voltage monitoring device location. The data acquisition device is used for acquiring the structure and the voltage distribution parameters of the power distribution network, generating a corresponding load node admittance matrix and a corresponding voltage distribution matrix, and sending the corresponding load node admittance matrix and the corresponding voltage distribution matrix to the central processing unit. In one embodiment, the central processing unit is configured to calculate a point distribution scheme of the voltage monitoring device that meets the voltage estimation accuracy and has a minimum point distribution position based on the distribution network structure and the voltage distribution parameters provided by the data acquisition device and the point distribution requirements provided by the man-machine operation interface. In one embodiment, the central processing unit comprises a data processing chip, an arithmetic unit and a memory which are sequentially connected, wherein the data processing chip receives text data or voice data input by the man-machine operation interface, extracts keywords in the text data and converts the voice data into text data. The arithmetic unit is used for selecting a point distribution scheme and calculating voltage estimation accuracy. The memory stores the distribution network structure and voltage distribution parameters, the user point distribution requirements and the point distribution scheme obtained by the arithmetic unit. In one embodiment, the arithmetic unit is connected with the display device, the sound output device and/or the wireless output device. In one embodiment, the command preview interface is configured to display a control command input by a user, so that the user can modify the control command conveniently. In one embodiment, the result output interface is used for displaying the voltage monitoring device distribution result obtained by the central processing unit and the power grid voltage estimation precision. The distribution scheme of the power distribution network voltage monitoring device can be obtained through the equipment.
It should be noted that other embodiments of the present invention further include a distribution network voltage monitoring device distribution method and system that are formed by combining technical features of the foregoing embodiments with each other and can be implemented.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
1. A distribution network voltage monitoring device distribution method, comprising:
according to load conditions, carrying out load partition on the power distribution network according to the principle of load distribution balance among all load areas to obtain a plurality of load areas;
configuring a voltage monitoring point at the tail end of each load area as an initial point distribution scheme of the voltage monitoring device;
estimating the whole network voltage distribution according to the voltage monitoring data and the power system state estimation method, calculating the maximum voltage estimation deviation of an initial point distribution scheme, and adding a voltage monitoring point at the maximum voltage estimation deviation when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint until a revised point distribution scheme that the maximum voltage estimation deviation meets the voltage estimation deviation constraint is obtained;
sequencing the importance degree of each voltage monitoring point in the revised point distribution scheme, and sequentially removing the voltage monitoring points from the position with the lowest importance degree until a target point distribution scheme which meets the voltage estimation deviation constraint and has the minimum point distribution is obtained; calculating the maximum voltage estimation deviation after eliminating the voltage monitoring points, taking a point distribution scheme before eliminating the last voltage monitoring point as the target point distribution scheme when the maximum voltage estimation deviation does not meet the voltage estimation deviation constraint, and continuously eliminating the voltage monitoring points from the position with the lowest importance degree when the maximum voltage estimation deviation meets the voltage estimation deviation constraint.
2. The distribution method of power distribution network voltage monitoring devices according to claim 1, wherein loads are distributed to the power distribution network according to load conditions, and the power distribution network is subjected to load partitioning according to the principle of load distribution balance among the position and distribution of the power distribution network and target load areas thereof.
3. The distribution network voltage monitoring device point distribution method according to claim 1, wherein ranking the importance degree of each voltage monitoring point in the revised point distribution scheme comprises: and updating the voltage estimation deviation of the point distribution scheme after eliminating a certain voltage monitoring point according to the voltage estimation deviation of the revised point distribution scheme to obtain the importance degree of the voltage monitoring point on the voltage estimation deviation of the revised point distribution scheme, and then sequencing each voltage monitoring point in the revised point distribution scheme according to the importance degree.
4. A distribution network voltage monitoring device point distribution method according to claim 3, wherein the greater the voltage estimation deviation of the point distribution scheme updated after a certain voltage monitoring point is removed, the higher the importance of the voltage monitoring point on the voltage estimation deviation of the revised point distribution scheme.
5. The distribution network voltage monitoring device distribution method according to claim 1, further comprising: and outputting the target point distribution scheme.
6. The distribution network voltage monitoring device distribution method according to claim 5, wherein the target distribution scheme is output to a target terminal.
7. The distribution network voltage monitoring device distribution method according to any one of claims 1 to 6, characterized in that the distribution network voltage monitoring device distribution method further comprises: and designing or adjusting each voltage monitoring point according to the target point distribution scheme.
8. Distribution network voltage monitoring device distribution system, characterized by being adapted to implement a distribution network voltage monitoring device distribution method according to any of claims 1 to 7.
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