CN115940155A - Voltage regulation method, device, equipment and storage medium of power distribution network - Google Patents
Voltage regulation method, device, equipment and storage medium of power distribution network Download PDFInfo
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Abstract
The invention discloses a voltage regulation method, a device, equipment and a storage medium of a power distribution network. The method comprises the following steps: determining a first voltage regulation mode set according to the out-of-limit cause of the voltage deviation of the power distribution network; carrying out load flow calculation on the power distribution network according to each voltage regulation mode, and screening the first voltage regulation mode set according to the calculation result to obtain a second voltage regulation mode set; and determining a target voltage regulation mode according to the second voltage regulation mode set, and performing voltage regulation on the power distribution network by adopting the target voltage regulation mode. When the voltage deviation of the power distribution network is out of limit, a first voltage regulation mode set is obtained through primary screening, then the first voltage regulation mode set is subjected to secondary screening through current flow calculation, and a second voltage regulation mode set which improves the voltage deviation of the power distribution network is determined.
Description
Technical Field
The invention relates to the technical field of power distribution networks, in particular to a voltage regulation method, a voltage regulation device, voltage regulation equipment and a storage medium of a power distribution network.
Background
The rural power distribution network has the characteristics of complex structure, dispersed load, overlarge power supply radius and the like, and is relatively weak in the aspects of grid structure and operation and maintenance management level. Along with the rapid promotion of new rural construction, the power load is greatly increased, and the construction of a novel power system is also promoted in order, new energy such as distributed photovoltaic and the like are intensively connected into a power distribution network, the weak points of the rural power distribution network are obvious, and the related requirements of voltage quality problems are on the rise.
Compared with the reconstruction of a grid structure and the large-scale line upgrading and reconstruction, the adoption of the voltage regulation measure of the power distribution network can greatly shorten the construction period, is more targeted in the aspect of the voltage quality control of the power distribution network, and is an important means for comprehensively controlling the voltage quality problem of the power distribution network in rural areas at present.
However, there are many measures for the voltage regulation of the power distribution network, and currently, when a multi-objective optimization method is adopted and a suitable measure is selected from a plurality of voltage regulation measures, the solution range corresponding to the target optimization method is large due to the plurality of voltage regulation measures, so that the calculation time is too long, and the calculation resource consumption is too large.
Disclosure of Invention
The invention provides a voltage regulation method of a power distribution network, which is used for realizing voltage regulation of the power distribution network with out-of-limit voltage deviation.
According to a first aspect of the present invention, there is provided a voltage regulation method for a power distribution network, comprising: determining a first voltage regulation mode set according to a distribution network voltage deviation out-of-limit cause, wherein the first voltage regulation mode set comprises voltage regulation modes associated with the voltage deviation out-of-limit cause;
load flow calculation is carried out on the power distribution network according to each voltage regulation mode, and the first voltage regulation mode set is screened according to the calculation result to obtain a second voltage regulation mode set, wherein the second voltage regulation mode set comprises voltage regulation modes for improving the voltage deviation out-of-limit of the power distribution network;
and determining a target voltage adjusting mode according to the second voltage adjusting mode set, and adjusting the voltage of the power distribution network by adopting the target voltage adjusting mode.
According to another aspect of the present invention, there is provided a voltage regulating device of a power distribution network, including:
the first voltage regulation mode set acquisition module is used for determining a first voltage regulation mode set according to a distribution network voltage deviation out-of-limit cause, wherein the first voltage regulation mode set comprises voltage regulation modes related to the voltage deviation out-of-limit cause;
the second voltage regulation mode set acquisition module is used for carrying out load flow calculation on the power distribution network according to each voltage regulation mode and screening the first voltage regulation mode set according to a calculation result to acquire a second voltage regulation mode set, wherein the second voltage regulation mode set comprises voltage regulation modes for improving the out-of-limit voltage deviation of the power distribution network;
and the voltage regulating module is used for determining a target voltage regulating mode according to the second voltage regulating mode set and regulating the voltage of the power distribution network by adopting the target voltage regulating mode.
According to another aspect of the present invention, there is provided an electronic apparatus including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the method according to any of the embodiments of the invention.
According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to perform the method according to any one of the embodiments of the present invention when the computer instructions are executed.
According to the technical scheme of the embodiment of the invention, when the voltage deviation of the power distribution network is out of limit, the first voltage regulation mode set is obtained through primary screening, then the first voltage regulation mode set is subjected to secondary screening through current flow calculation, and the second voltage regulation mode set which improves the voltage deviation of the power distribution network is determined, so that when the optimal target voltage regulation mode is selected by adopting a multi-objective optimization method, the solution range is obviously reduced, the calculation resources are saved, and the calculation efficiency is improved.
It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a voltage regulation method for a power distribution network according to an embodiment of the present invention;
fig. 2 is a flowchart of a voltage regulation method for a power distribution network according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a voltage regulating device of a power distribution network according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device implementing the fourth embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above 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 invention 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.
Example one
Fig. 1 is a flowchart of a light-storage cooperative configuration method applied to a light-storage straight-flexible building according to an embodiment of the present invention, where the present embodiment is applicable to a situation of configuring a photovoltaic of a light-storage straight-flexible building, and the method may be executed by a light-storage cooperative configuration device applied to a light-storage straight-flexible building, where the device may be implemented in a form of hardware and/or software. As shown in fig. 1, the method includes:
step S101, a first voltage regulation mode set is determined according to a distribution network voltage deviation out-of-limit cause.
Optionally, determining the first voltage adjustment mode set according to the out-of-limit cause of the voltage deviation of the power distribution network includes: inquiring a fault comparison table according to the voltage out-of-limit cause of the distribution network to obtain a voltage regulation mode, wherein the fault comparison table comprises the corresponding relation between each voltage out-of-limit cause and the voltage regulation mode; and constructing a first voltage regulation mode set according to the inquired voltage regulation modes, wherein the voltage regulation modes comprise voltage regulation measures and gear ranges corresponding to the voltage regulation measures.
Specifically, the national standard "power quality supply voltage deviation" (GB/T12325-2008) stipulates that the limit value of the supply voltage deviation is: the deviation of three-phase power supply voltage of 20kV and below is +/-7% of the nominal voltage; the 220V single-phase power supply voltage deviation is +7% and-10% of the nominal voltage. The out-of-limit voltage deviation reasons of the power distribution network are classified according to different dimensions as follows: the bus voltage problem, the network frame foundation is weak, the influence of distributed power supply access, and the user sensitivity are not matched with the phenomenon voltage deviation standard. The corresponding power distribution network voltage regulation measures comprise: the method comprises the steps of adjusting the bus voltage of a transformer substation, increasing the wire diameter of a lead, installing a 10kV line voltage regulator, adjusting small hydroelectric excitation, installing 10kV line reactive compensation, distributing and transforming capacitor reactive compensation, distributing and transforming SVG dynamic reactive compensation device, distributed photovoltaic reactive compensation, installing a power spring, adjusting a distributing and transforming gear and the like. And for each voltage regulation measure there is a corresponding range, e.g. for increasing the wire diameter there is a range 1: greater than 1mm and less than 4mm; the gear range is 2: more than 5mm, less than 7mm and the like, so that multiple gear ranges can be provided for each voltage regulation measure, and the voltage regulation measure and a corresponding gear range are used as a voltage regulation mode, so that the out-of-limit condition of the voltage deviation of the power distribution network comprises a large number of voltage regulation modes, and if the optimal regulation mode is solved from the large number of voltage regulation modes, a large amount of calculation resources are consumed. Therefore, in the embodiment, the first voltage regulation mode set can be determined according to the cause of the voltage out-of-limit, and the voltage regulation modes associated with the cause of the voltage deviation out-of-limit are included in the first voltage regulation mode set, so that the preliminary screening of the voltage regulation modes can be realized.
In a specific implementation, the power distribution network is detected, when it is determined that the voltage deviation of the power distribution network is out of limit based on national standards, the power distribution network is detected in real time, the cause of the out-of-limit voltage deviation is obtained, and a fault comparison table is queried according to the cause of the out-of-limit voltage deviation to obtain a voltage regulation mode, wherein the following table 1 shows an example of the fault comparison table:
TABLE 1
The fault comparison table includes a corresponding relationship between each out-of-limit deviation cause and a voltage regulation manner, and the voltage regulation manner specifically includes a voltage regulation measure and a gear range corresponding to the voltage regulation measure.
When it is determined that the voltage deviation is out of limit due to the weak grid foundation and the problem of the bus voltage, the fault table shown in the lookup table 1 can be used to obtain a first voltage regulation mode set = { increase wire diameter 1mm < wire diameter <4mm increase wire diameter 5mm < wire diameter <7mm distribution and transformation capacitor reactive compensation 10< compensation value <20 distribution and transformation capacitor reactive compensation 30< compensation value <40 installation 10KV line voltage regulator 60P < regulator power <65P installation 10KV line voltage regulator 70P < regulator power <75P regulation substation bus voltage 5V < voltage range <10V regulation bus substation voltage 15V < voltage range <20V distributed photovoltaic reactive compensation 15< compensation value <30 distributed photovoltaic reactive compensation 20< compensation value <25}. Of course, the present embodiment is only an example, and the specific content of the first voltage adjustment manner set is not limited, and the first voltage adjustment manner generally includes a plurality of voltage adjustment manners, but is significantly reduced compared to all voltage adjustment manners specified in the national standard. Therefore, the voltage deviation out-of-limit cause can be used for carrying out preliminary screening from a plurality of voltage adjusting modes so as to reduce the determining range of the electric tower adjusting mode.
And S102, carrying out load flow calculation on the power distribution network according to each voltage regulation mode, and screening the first voltage regulation mode set according to the calculation result to obtain a second voltage regulation mode set.
Optionally, performing load flow calculation on the power distribution network according to each voltage regulation mode includes: acquiring designated parameters of the power distribution network under each voltage regulation mode, wherein the designated parameters comprise input line parameters, load active power, load reactive power, load active loss and load reactive loss; and carrying out load flow calculation on the power distribution network according to the specified parameters, and obtaining the voltage value of each node aiming at each voltage regulation mode on the power distribution network.
Optionally, the screening the first voltage adjustment mode set according to the calculation result to obtain a second voltage adjustment mode set includes: calculating the voltage deviation value of each node in each voltage regulation mode according to the nominal voltage value and the voltage value of each node; judging whether the voltage deviation value of each node aiming at each voltage regulation mode is not out-of-limit, if so, reserving the voltage regulation modes, otherwise, determining the reserved voltage regulation modes according to the number of the nodes with out-of-limit voltage deviation under each voltage regulation mode; and constructing a second voltage regulation mode set according to the reserved voltage regulation modes.
Optionally, determining the reserved voltage regulation mode according to the number of nodes with out-of-limit voltage deviation under each voltage regulation mode includes: and judging whether the number of the nodes of which the voltage deviation is out of limit under each voltage regulation mode is reduced, if so, reserving the voltage regulation modes, and otherwise, reserving the voltage regulation modes of which the reduction amount of the node voltage deviation is larger than a preset value under each voltage regulation mode.
Specifically, after the first voltage regulation mode set is determined, a load flow calculation mode is adopted to determine a regulation mode for improving the voltage deviation out-of-limit problem in the first voltage regulation mode set, and a second voltage regulation mode set is constructed for the voltage regulation mode for improving the voltage deviation out-of-limit problem in the distribution network. Specifically, the specified parameters of the power distribution network in each voltage regulation mode, such as input line parameters, load active power, load reactive power, load active loss, load reactive loss, etc., are obtained, but this embodiment is merely an example and does not limit the specific types of the specified parameters. And carrying out load flow calculation on the power distribution network according to the specified parameters so as to obtain the voltage value of each node of the power distribution network in each voltage regulation mode. However, the specific principle of the power flow calculation is not the focus of the present application, and therefore, the detailed description thereof is omitted in this embodiment. After the voltage values of the nodes of the power distribution network corresponding to each voltage regulation mode are obtained, the improvement condition of the voltage regulation mode on the voltage deviation out-of-limit can be determined according to the voltage values of the nodes.
For example, when the voltage is adjusted by increasing the wire diameter of the conducting wire by 1mm<Wire diameter of conducting wire<When the voltage value is 4mm, after the voltage value of each node on the power distribution network in the voltage regulation mode is determined, according to the nominal voltage Un of the power distribution network, when the voltage value of the ith node is obtained as U i Then can be according to |1-U i The voltage offset value of the ith node is determined, and of course, in this embodiment, only the ith node is taken as an example, and the manner of obtaining the voltage offset values of other nodes is substantially the same, and details are not repeated in this embodiment. When the voltage deviation of each node is determined not to have the out-of-limit condition, the diameter of the lead is increased by 1mm<Wire diameter of conducting wire<The regulating effect of 4mm on voltage deviation out-of-limit is good, so that the regulating mode is reserved, and otherwise, the regulating mode is deleted; when the node with the out-of-limit voltage deviation still exists in the power distribution network, acquiring the number of the original node with the out-of-limit voltage deviation of the power distribution network before adjustment, comparing the number of the node with the out-of-limit voltage deviation before and after adjustment, if the number of the node is reduced, indicating that the out-of-limit voltage deviation is improved by the adjusting mode, still keeping the node, or deleting the node; and when the number of the nodes with voltage deviation out-of-limit before and after adjustment is determined to be consistent through the comparison of the previous step, further judging whether the nodes with voltage deviation reduction larger than 1% exist before the adjustment. For example, in the distribution network, the voltage deviation before the i-th node is not adjusted is out of limit +20, the deviation after adjustment is out of limit, but is changed into +15, and the voltage deviation reduction amount is greater than 1%, so that the adjustment mode is still effectively reserved maliciously although the improvement is less, or the voltage deviation before the i-th node is not adjusted is out of limit-40, the deviation after adjustment is still out of limit, but is changed into-30, and the voltage deviation reduction amount is also greater than 1%, so that the adjustment mode can be reserved. Therefore, in the present embodiment, the second voltage regulation mode set is constructed according to the reserved voltage regulation modes, and therefore the second voltage regulation mode set includesThe voltage regulation mode for improving the voltage deviation out-of-limit of the power distribution network is mainly divided into three conditions according to the improvement of the content: firstly, the problem that the voltage deviation is out of limit can be completely solved, and nodes with out-of-limit voltage deviation do not appear any more; secondly, although the problem is not completely solved, the number of nodes with out-of-limit voltage deviation is reduced; thirdly, although the number of nodes with out-of-limit voltage deviation is not changed, the amplitude of out-of-limit node voltage deviation is reduced. For example, the second set of voltage adjustment modes obtained after the screening = { increase in wire diameter by 1mm = { (increase in wire diameter by 1 mm)<Wire diameter of conducting wire<Reactive compensation 10 for 4mm distribution and transformation capacitor<Compensation value<20-installation 10KV line voltage regulator 60P<Voltage regulator power<65P adjusts transformer substation bus voltage 5V<Range of voltage<10V distributed photovoltaic reactive compensation 15<Compensation value<30, it can be seen that the number of voltage regulation modes in the second set of voltage regulation modes obtained is further reduced.
And S103, determining a target voltage regulation mode according to the second voltage regulation mode set, and performing voltage regulation on the power distribution network by adopting the target voltage regulation mode.
Optionally, determining the target voltage adjustment manner according to the second voltage adjustment manner set includes: acquiring a candidate voltage regulation mode according to the second voltage regulation mode set; determining a fitness function for the candidate voltage regulation mode; and performing optimal solution calculation on each candidate voltage regulation mode by adopting a genetic algorithm based on the fitness function, and taking a calculation result as a target voltage regulation mode.
Optionally, determining a fitness function for the candidate voltage adjustment manner includes: calculating correlation indexes corresponding to the candidate voltage regulation modes, wherein the correlation indexes comprise the minimum value of the sum of absolute values of node voltage deviations, the comprehensive cost and the power failure time; acquiring weight coefficients corresponding to the correlation indexes; and constructing a fitness function according to the correlation indexes and the weight coefficients.
Specifically, in this embodiment, after the second voltage regulation mode is obtained, an initial population may be formed according to each voltage regulation mode, an optimal solution may be obtained by using a genetic algorithm, the obtained optimal solution may be used as a target voltage regulation mode, and the target voltage regulation mode may be used to regulate the voltage of the power distribution network. Due to the fact that the solving range is greatly reduced through the initial screening and the secondary screening, when the target voltage adjusting mode is determined, computing resources are saved, and computing efficiency is improved.
In the embodiment of the application, when the voltage deviation of the power distribution network is out of limit, a first voltage regulation mode set is obtained through primary screening, then the first voltage regulation mode set is subjected to secondary screening through current flow calculation, and a second voltage regulation mode set which improves the voltage deviation of the power distribution network is determined, so that when an optimal target voltage regulation mode is selected by adopting a multi-objective optimization method, the solution range is remarkably reduced, the calculation resources are saved, and the calculation efficiency is improved.
Example two
Fig. 2 is a flowchart of a voltage regulation method for a power distribution network according to a second embodiment of the present invention, and this embodiment mainly specifically describes determining a target voltage regulation manner according to a second voltage regulation manner set based on the above embodiments. As shown in fig. 2, the method includes:
step S201, obtaining a candidate voltage adjustment mode according to the second voltage adjustment mode set.
Specifically, in the present embodiment, after the second voltage adjustment mode is determined, for example, the second voltage adjustment mode set = { increase conductor wire diameter 1mm < conductor wire diameter <4mm distribution transformer capacitor reactive compensation 10< compensation value <20 installation 10KV line regulator 60P < regulator power <65P adjustment substation bus voltage 5V < voltage range <10V distributed photovoltaic reactive compensation 15< compensation value <30}. A single voltage adjustment manner in the second voltage adjustment manner set may be used as one candidate voltage adjustment manner, or a combination of a plurality of voltage adjustment manners in the set may be used as one candidate voltage adjustment manner, and data on the voltage adjustment manners included in the combination may be specifically specified in advance by a user, for example, 2, and a specific combination manner of each candidate voltage adjustment manner is not limited in this embodiment.
Step S202, a fitness function for the candidate voltage adjusting mode is determined.
Optionally, determining a fitness function for the candidate voltage adjustment manner includes: calculating correlation indexes corresponding to the candidate voltage regulation modes, wherein the correlation indexes comprise the minimum value of the sum of absolute values of node voltage deviations, the comprehensive cost and the power failure time; acquiring weight coefficients corresponding to the correlation indexes; and constructing a fitness function according to the correlation indexes and the weight coefficients.
Specifically, in this embodiment, after determining each candidate voltage adjustment mode, the following formula (1) may be used to obtain the minimum value D of the sum of absolute values of voltage deviations of the nodes of the power distribution network:
d is the minimum value of the sum of absolute values of voltage deviations of all nodes of the medium-voltage distribution network, N is the number of nodes of the distribution network, and U is the number of the nodes of the distribution network i The voltage value of the node of the ith node special transformer user or the voltage value of the head end of the low-voltage side of the public transformer area, U n Is the nominal voltage value.
Acquiring the corresponding comprehensive cost C under each candidate voltage regulation mode by adopting the following formula (2):
wherein C is the comprehensive cost of all voltage regulation modes, M is the number of voltage regulation modes, and C j The j th voltage regulation mode of the composite cost, k j The weighting coefficient is the cost of the jth voltage regulation mode, the range is 0-1, the preset value is 1, and the weighting coefficient can be adjusted according to the actual situation.
Acquiring the corresponding power failure time T under each candidate voltage regulation mode by adopting the following formula (3):
T＝min{max(Tg i )+To i }(3)
wherein T is the power failure time for implementing the candidate voltage regulation mode; i =1, 2.. M, where M is the number of voltage regulation modes implemented, tgi is the blackout time required for the modification of the ith regulation mode, toi is the blackout time required for the operation of the ith regulation mode, and if the modification of the various regulation modes starts simultaneously, the total modification time required is max (Tgi).
After obtaining the associated indexes according to the above formulas (1), (2) and (3), respectively obtaining the weight coefficients corresponding to the associated indexes, and constructing a fitness function F by using the following formula (4):
wherein, a 1 、a 2 、a 3 The weighting coefficients are respectively voltage deviation D, comprehensive cost C and power failure time T; c total The sum of the placement costs for all voltage adjustments; t is a unit of max And the maximum value of the required power failure time is modified for all voltage regulation modes.
And S203, performing optimal solution calculation on each candidate voltage regulation mode by adopting a genetic algorithm based on the fitness function, and taking a calculation result as a target voltage regulation mode.
Specifically, in the embodiment, each candidate voltage regulation mode is used to construct an initial population, a sub-population is generated through crossing and variation, a formula (4) is used as a fitness function, the fitness function is compared with values corresponding to the historical optimal position and the global optimal position, and an optimal solution is found out to update the population. When the iteration number or the global optimum position meets the minimum limit, outputting an optimum variable value, and using the output optimum variable value as a target voltage adjusting mode, for example, the target voltage adjusting mode is to increase the wire diameter by 1mm < the wire diameter by 4mm, which is only an example in this embodiment, and the specific content of the target voltage adjusting mode is not limited. Since the specific calculation principle of the genetic algorithm is not the focus of the present application, details will not be described in this embodiment.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a voltage regulation device of a power distribution network according to a fourth embodiment of the present invention. As shown in fig. 3, the apparatus includes: a first voltage regulation mode set acquisition module 310, a second voltage regulation mode set acquisition module 320 and a voltage regulation module 330.
A first voltage regulation mode set obtaining module 310, configured to determine a first voltage regulation mode set according to a distribution network voltage deviation out-of-limit cause, where the first voltage regulation mode set includes voltage regulation modes associated with the voltage deviation out-of-limit cause;
the second voltage regulation mode set obtaining module 320 is configured to perform load flow calculation on the power distribution network according to each voltage regulation mode, and screen the first voltage regulation mode set according to the calculation result to obtain a second voltage regulation mode set, where the second voltage regulation mode set includes a voltage regulation mode that improves the out-of-limit voltage deviation of the power distribution network;
and the voltage regulating module 330 is configured to determine a target voltage regulating manner according to the second voltage regulating manner set, and perform voltage regulation on the power distribution network by using the target voltage regulating manner.
Optionally, the first voltage regulation mode set obtaining module is configured to query a fault comparison table according to the out-of-limit cause of the voltage deviation of the power distribution network to obtain a voltage regulation mode, where the fault comparison table includes a correspondence between each out-of-limit deviation cause and a voltage regulation mode;
and constructing a first voltage regulation mode set according to the inquired voltage regulation modes, wherein the voltage regulation modes comprise voltage regulation measures and gear ranges corresponding to the voltage regulation measures.
Optionally, the second voltage regulation mode set obtaining module includes a load flow calculation submodule, configured to obtain specified parameters of the power distribution network in each voltage regulation mode, where the specified parameters include an input line parameter, a load active power, a load reactive power, a load active loss, and a load reactive loss;
and carrying out load flow calculation on the power distribution network according to the specified parameters, and acquiring the voltage value of each node aiming at each voltage regulation mode on the power distribution network.
Optionally, the second voltage regulation mode set obtaining sub-module is configured to calculate a voltage deviation value of each node in each voltage regulation mode according to the nominal voltage value and the voltage value of each node;
judging whether the voltage deviation value of each node aiming at each voltage regulation mode is not out-of-limit, if so, reserving the voltage regulation modes, otherwise, determining the reserved voltage regulation modes according to the number of the nodes with out-of-limit voltage deviation under each voltage regulation mode;
and constructing a second voltage regulation mode set according to the reserved voltage regulation modes.
Optionally, the second voltage regulation mode set obtaining submodule is further configured to determine whether the number of nodes with out-of-limit voltage deviations in each voltage regulation mode is reduced, if yes, the voltage regulation mode is retained,
otherwise, the voltage regulation modes with the node voltage deviation reduction larger than the preset value in each voltage regulation mode are reserved.
Optionally, the voltage adjusting module includes a target voltage adjusting mode determining submodule, configured to obtain a candidate voltage adjusting mode according to the second voltage adjusting mode set;
determining a fitness function for the candidate voltage regulation mode;
and calculating the optimal solution of each candidate voltage regulation mode by adopting a genetic algorithm based on the fitness function, and taking the calculation result as a target voltage regulation mode.
Optionally, the target voltage adjustment mode determining submodule is further configured to calculate a correlation index corresponding to each candidate voltage adjustment mode, where the correlation index includes a minimum value of a sum of absolute values of node voltage deviations, a comprehensive cost, and a power outage time;
acquiring a weight coefficient corresponding to each correlation index;
and constructing a fitness function according to the correlation indexes and the weight coefficients.
The voltage regulation method for the power distribution network provided by the embodiment of the invention can be executed, and has the corresponding functional modules and beneficial effects of the execution method.
Example four
FIG. 4 shows a schematic block diagram of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 4, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM13, various programs and data necessary for the operation of the electronic apparatus 10 can also be stored. The processor 11, the ROM12, and the RAM13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
A number of components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, or the like. The processor 11 performs the various methods and processes described above, such as the voltage regulation method of the distribution network.
In some embodiments, the voltage regulation method applied to the power distribution network may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM12 and/or the communication unit 19. When the computer program is loaded into the RAM13 and executed by the processor 11, one or more steps of the voltage regulation method of the power distribution network described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured in any other suitable way (e.g., by means of firmware) to perform a voltage regulation method of the power distribution network.
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.
In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.
It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.
The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method of regulating voltage in a power distribution network, comprising:
determining a first voltage regulation mode set according to a distribution network voltage deviation out-of-limit cause, wherein the first voltage regulation mode set comprises voltage regulation modes associated with the voltage deviation out-of-limit cause;
load flow calculation is carried out on the power distribution network according to each voltage regulation mode, and the first voltage regulation mode set is screened according to the calculation result to obtain a second voltage regulation mode set, wherein the second voltage regulation mode set comprises voltage regulation modes for improving the voltage deviation out-of-limit of the power distribution network;
and determining a target voltage regulation mode according to the second voltage regulation mode set, and performing voltage regulation on the power distribution network by adopting the target voltage regulation mode.
2. The method of claim 1, wherein determining the first set of voltage regulation modes based on the distribution network voltage deviation violation causes comprises:
inquiring a fault comparison table according to the out-of-limit cause of the voltage deviation of the power distribution network to obtain a voltage regulation mode, wherein the fault comparison table comprises the corresponding relation between each out-of-limit cause of the voltage deviation and the voltage regulation mode;
and constructing the first voltage regulation mode set according to the inquired voltage regulation mode, wherein the voltage regulation mode comprises a voltage regulation measure and a gear range corresponding to the voltage regulation measure.
3. The method of claim 1, wherein the performing a power flow calculation for the distribution network based on the voltage regulation modes comprises:
acquiring specified parameters of the power distribution network under each voltage regulation mode, wherein the specified parameters comprise input line parameters, load active power, load reactive power, load active loss and load reactive loss;
and carrying out load flow calculation on the power distribution network according to the specified parameters, and acquiring the voltage value of each node aiming at each voltage regulation mode on the power distribution network.
4. The method according to claim 3, wherein the screening the first set of voltage adjustment modes according to the calculation result to obtain a second set of voltage adjustment modes comprises:
calculating the voltage deviation value of each node in each voltage regulation mode according to the nominal voltage value and the voltage value of each node;
judging whether the voltage deviation value of each node aiming at each voltage regulation mode is not out-of-limit, if so, reserving the voltage regulation mode, otherwise, determining the reserved voltage regulation mode according to the number of the nodes with out-of-limit voltage deviation under each voltage regulation mode;
and constructing the second voltage regulation mode set according to the reserved voltage regulation modes.
5. The method of claim 4, wherein determining the remaining voltage regulation modes based on the number of nodes for which the voltage deviation is out of limit for each voltage regulation mode comprises:
judging whether the number of nodes with out-of-limit voltage deviation under each voltage regulation mode is reduced, if so, reserving the voltage regulation mode,
otherwise, the voltage regulation mode with the node voltage deviation reduction larger than the preset value in each voltage regulation mode is reserved.
6. The method of claim 1, wherein determining a target voltage adjustment mode from the second set of voltage adjustment modes comprises:
acquiring a candidate voltage regulation mode according to the second voltage regulation mode set;
determining a fitness function for the candidate voltage regulation mode;
and performing optimal solution calculation on each candidate voltage regulation mode by adopting a genetic algorithm based on the fitness function, and taking a calculation result as the target voltage regulation mode.
7. The method of claim 6, wherein determining a fitness function for the candidate voltage adjustment mode comprises:
calculating correlation indexes corresponding to the candidate voltage regulation modes, wherein the correlation indexes comprise the minimum value of the sum of absolute values of node voltage deviations, the comprehensive cost and the power failure time;
acquiring a weight coefficient corresponding to each correlation index;
and constructing the fitness function according to the correlation index and the weight coefficient.
8. A voltage regulation device for a power distribution network, comprising:
the voltage regulation method set acquisition module is used for determining a first voltage regulation method set according to a distribution network voltage deviation out-of-limit cause, wherein the first voltage regulation method set comprises voltage regulation methods related to the voltage deviation out-of-limit cause;
the second voltage regulation mode set acquisition module is used for carrying out load flow calculation on the power distribution network according to each voltage regulation mode and screening the first voltage regulation mode set according to a calculation result to acquire a second voltage regulation mode set, wherein the second voltage regulation mode set comprises voltage regulation modes for improving the out-of-limit voltage deviation of the power distribution network;
and the voltage regulating module is used for determining a target voltage regulating mode according to the second voltage regulating mode set and regulating the voltage of the power distribution network by adopting the target voltage regulating mode.
9. An electronic device, characterized in that the electronic device comprises:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.
10. A computer-readable storage medium, having stored thereon computer instructions for causing a processor, when executed, to implement the method of any one of claims 1-7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116707030A (en) * | 2023-07-31 | 2023-09-05 | 国网浙江省电力有限公司湖州供电公司 | Self-adaptive regulation and control method for light storage straight-flexible system of low-carbon transformer substation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116707030A (en) * | 2023-07-31 | 2023-09-05 | 国网浙江省电力有限公司湖州供电公司 | Self-adaptive regulation and control method for light storage straight-flexible system of low-carbon transformer substation |
| CN116707030B (en) * | 2023-07-31 | 2023-11-14 | 国网浙江省电力有限公司湖州供电公司 | Self-adaptive regulation and control method for light storage straight-flexible system of low-carbon transformer substation |
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