CN109742754B - Method for determining operation efficiency of main equipment of power distribution network and related product - Google Patents
Method for determining operation efficiency of main equipment of power distribution network and related product Download PDFInfo
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- CN109742754B CN109742754B CN201910073940.6A CN201910073940A CN109742754B CN 109742754 B CN109742754 B CN 109742754B CN 201910073940 A CN201910073940 A CN 201910073940A CN 109742754 B CN109742754 B CN 109742754B
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Abstract
The invention provides a method for determining the operation efficiency of main equipment of a power distribution network, which comprises the following steps: acquiring basic parameters and operation conditions of target main equipment and basic parameters and topological structures of additional main equipment related to the target main equipment; determining the optimal load of the associated additional main equipment by using the basic parameters of the target main equipment and the basic parameters and the topological structures of the associated additional main equipment; and determining the operation efficiency of the target main equipment by using the optimal load and the operation condition of the target main equipment. The method for determining the operation efficiency of the main equipment of the power distribution network determines the optimal load as a determination reference by considering the overall economic operation mode of the distribution line and the transformer, so that the objective determination of the operation efficiency of the main equipment of the power distribution network is realized, and the main equipment of the power distribution network is optimized. The method for determining the operation efficiency of the main equipment of the power distribution network and the related products have the beneficial effects, and are not repeated.
Description
Technical Field
The invention relates to the technical field of power distribution networks, in particular to a method for determining the operation efficiency of main equipment of a power distribution network and a related product.
Background
The development of science and technology puts higher requirements on various links such as planning, construction, operation, management and standards of the power distribution network, and the operation efficiency of the power distribution network is the comprehensive reflection of the links. If the operation efficiency can be effectively improved on the premise of ensuring the power supply reliability and the electric energy quality of the power grid, the investment can be greatly saved or delayed, the input-output efficiency of the power distribution network is obviously improved, and an important foundation is laid for the sustainable development of the power distribution network, the overall benefit of a company and the realization of diversified social values. Therefore, the significance of relevant research and practice work for determining and analyzing the operating efficiency of the power distribution network is great.
The line and the transformer are used as main equipment of the power distribution network, the optimal load capacity of the line and the transformer is used as a determination reference in the currently developed operation efficiency determination work, and the optimal load capacity of the transformer is calculated based on the no-load loss and the short-circuit loss of the transformer according to GB/T13462 power transformer economic operation; for distribution lines, the optimum load capacity is calculated based on the economic current according to DL/T5222 conductor and appliance selection design technical provisions. However, the calculation method in the prior art has natural defects.
Therefore, how to provide a scheme for determining the operation efficiency of the main equipment of the power distribution network can objectively determine the operation efficiency of the main equipment of the power distribution network so as to optimize the main equipment of the power distribution network is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a method for determining operation efficiency of a main device of a power distribution network and a related product, which can objectively determine the operation efficiency of the main device of the power distribution network so as to optimize the main device of the power distribution network. The specific scheme is as follows:
in a first aspect, the present invention provides a method for determining an operation efficiency of a power distribution network master device, including:
acquiring basic parameters and operation conditions of target main equipment and basic parameters and topological structures of additional main equipment related to the target main equipment;
determining the optimal load of the associated additional main equipment by using the basic parameters of the target main equipment and the basic parameters and the topological structures of the associated additional main equipment;
and determining the operation efficiency of the target main equipment by using the optimal load and the operation condition of the target main equipment.
Preferably, the first and second electrodes are formed of a metal,
the target master device is a target line;
the additional primary device is a transformer.
Preferably, the first and second electrodes are formed of a metal,
the method for determining the optimal line load of the target line by using the basic parameters of the target line and the basic parameters and the topological structure of the transformer associated with the basic parameters comprises the following steps:
the line optimum load is calculated using the following equation:
wherein, P el For optimum loading of the line, U N Is the rated voltage of the target line, k is the load curve shape coefficient of the target line, P 0 For no-load losses of transformers, R t Is the equivalent resistance, R, of the transformer l Is the resistance of the target line.
Preferably, the first and second electrodes are formed of a metal,
the target main equipment is a target transformer;
the additional master device is a line.
Preferably, the first and second electrodes are formed of a metal,
the method for determining the optimal transformer load of the target transformer by using the basic parameters of the target transformer and the basic parameters and the topological structure of the line associated with the target transformer comprises the following steps:
the optimal load of the transformer is calculated using the following formula:
wherein, P et For optimal loading of the transformer, P N Is the rated capacity of the target transformer, P 0 Is the no-load loss of the target transformer, P d For short path loss of the target transformer, R t Is the equivalent resistance, R, of the target transformer l Is the resistance of the line connected to the target transformer.
Preferably, the first and second electrodes are formed of a metal,
the determining the operation efficiency of the target master device by using the optimal load and the operation condition of the target master device includes:
dividing the operation curve of the target main equipment into N intervals according to time intervals, wherein N is a positive integer;
dividing the load of each interval by the optimal load of the target main equipment to obtain the load rates of N intervals;
and carrying out weighted average on the load rates of the N intervals to obtain the operating efficiency of the target line.
In a second aspect, the present invention provides a system for determining an operation efficiency of a main device of a power distribution network, including:
the parameter acquisition module is used for acquiring basic parameters and running conditions of the target main equipment and basic parameters and topological structures of the additional main equipment related to the target main equipment;
the optimal load determining module is used for determining the optimal load of the associated additional main equipment by utilizing the basic parameters of the target main equipment and the basic parameters and the topological structures of the associated additional main equipment;
and the operation efficiency determination module is used for determining the operation efficiency of the target main equipment by using the optimal load and the operation condition of the target main equipment.
Preferably, the first and second electrodes are formed of a metal,
the operating efficiency determination module includes:
the interval dividing unit is used for equally dividing the operation curve of the target main equipment into N intervals according to time intervals, wherein N is a positive integer;
the load rate calculation unit is used for dividing the load of each interval by the optimal load of the target main equipment to obtain the load rates of N intervals;
and the efficiency weighting unit is used for carrying out weighted average on the load rates of the N intervals to obtain the operating efficiency of the target line.
In a third aspect, the present invention provides a device for determining operation efficiency of a main device of a power distribution network, including:
a memory for storing a computer program;
a processor, configured to implement the steps of the method for determining an operation efficiency of a main device of a power distribution network according to the first aspect when executing the computer program.
In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for determining the operation efficiency of the power distribution network master device according to the first aspect.
The invention provides a method for determining the operation efficiency of main equipment of a power distribution network, which comprises the following steps: acquiring basic parameters and operation conditions of target main equipment and basic parameters and topological structures of additional main equipment related to the target main equipment; determining the optimal load of the associated additional main equipment by using the basic parameters of the target main equipment and the basic parameters and the topological structures of the associated additional main equipment; and determining the operation efficiency of the target main equipment by using the optimal load and the operation condition of the target main equipment. The method for determining the operation efficiency of the main equipment of the power distribution network determines the optimal load as a determination reference by considering the overall economic operation mode of the distribution line and the transformer, so that the objective determination of the operation efficiency of the main equipment of the power distribution network is realized, and the main equipment of the power distribution network is optimized.
The method for determining the operation efficiency of the main equipment of the power distribution network and the related products have the beneficial effects, and are not repeated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a method for determining an operation efficiency of a main device of a power distribution network according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for determining an operation efficiency of a main device of a power distribution network according to an embodiment of the present invention;
FIG. 3 is a flow chart of the determination of the operational efficiency of a target link provided by one embodiment of the present invention;
fig. 4 is a flowchart of a method for determining an operation efficiency of a main device of a power distribution network according to an embodiment of the present invention;
FIG. 5 is a flow chart of the determination of the operating efficiency of a target transformer provided by one embodiment of the present invention;
fig. 6 is a schematic structural diagram of a system for determining an operation efficiency of a main device of a power distribution network according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an operation efficiency determination module of an operation efficiency determination system of a power distribution network master device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a computer device according to yet another embodiment of the present invention.
Detailed Description
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.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for determining an operation efficiency of a main device of a power distribution network according to an embodiment of the present invention.
In a specific implementation manner of the present invention, an embodiment of the present invention provides a method for determining an operation efficiency of a power distribution network master device, including:
step S11: acquiring basic parameters and operation conditions of target main equipment and basic parameters and topological structures of additional main equipment related to the target main equipment;
step S12: determining the optimal load of the associated additional main equipment by using the basic parameters of the target main equipment and the basic parameters and the topological structures of the associated additional main equipment;
step S13: and determining the operation efficiency of the target main equipment by using the optimal load and the operation condition of the target main equipment.
In the embodiment of the invention, the economic load factor of the distribution transformer has wide variation range and has large relation with the line structure, the line length, the wire section, the branch line layout and the like. Meanwhile, the number, capacity, model and the like of the transformers determine the equivalent resistance of the transformers, and the equivalent resistance of the transformers also has great influence on the economic load rate of the distribution line. The overall economic operation of the distribution line and the distribution transformer as a whole should be studied by considering the losses of the distribution transformer and the conducting wire at the same time, and considering the minimum total loss of the distribution transformer and the conducting wire as the optimal operation condition. The current optimal load is used for analyzing the transformer and the line independently, so that the optimal load calculation of the transformer and the line has deviation, and the operation efficiency of the power distribution network cannot be determined accurately.
The purpose of the invention is as follows: the patent provides a method for determining the operation efficiency of a power distribution network main device, which comprehensively considers the overall economic operation mode of a distribution line and a transformer and determines the optimal load as a determination reference so as to realize objective determination of the operation efficiency of the power distribution network main device.
In the embodiment of the invention, the main equipment parameters and the operation parameters need to be acquired firstly, and specifically, the rated capacity P of the transformer can be acquired from a power distribution network production management system N No load loss P 0 Short circuit loss P k Equal value resistance R t (ii) a Rated voltage U of acquisition line N Load curve shape coefficient k/he; load data of T time periods of the transformer and the line can be acquired from the power distribution network energy management system and divided into M sections according to time intervals delta T, and the load data of the ith section are P sections respectively ti And P li (ii) a The connection relation between the transformer and the line can be acquired from a distribution network marketing system or a GIS system.
After obtaining the basic parameters and the operating conditions of the target main device and the basic parameters and the topology structures of the additional main devices associated with the target main device, the optimal load of the main device may be calculated, and specifically, the target device may be divided into a transformer and a line for performing the calculation respectively.
Referring to fig. 2 and fig. 3, fig. 2 is a flowchart illustrating a method for determining an operation efficiency of a main device of a power distribution network according to an embodiment of the present invention; fig. 3 is a flow chart of the determination of the operating efficiency of the target link according to an embodiment of the present invention.
On the basis of the foregoing specific embodiment, in this specific embodiment, the target master device is a target line; the additional primary device is a transformer. That is to say: the embodiment provides a method for determining the operation efficiency of a main device of a power distribution network, which is used for a power distribution line and comprises the following steps:
step S21: acquiring basic parameters and operation conditions of a target line and basic parameters and a topological structure of a transformer related to the target line;
step S22: determining the optimal line load of a target line by using the basic parameters of the target line and the basic parameters and the topological structure of a transformer related to the basic parameters;
step S23: and determining the operation efficiency of the target line by using the optimal load of the line and the operation condition of the target line.
Wherein, the basic parameters of the target line comprise: rated voltage, load curve shape coefficient, line resistance.
Specifically, the optimal load of the target line is determined by using the basic parameters of the target line and the basic parameters and the topology of the transformer associated with the target line, and the optimal load of the target line can be calculated by using the following formula:
wherein, P el For optimum loading of the line, U N Is the rated voltage of the target line, k is the load curve shape coefficient of the target line, P 0 For no-load losses of transformers, R t Is the equivalent resistance, R, of the transformer l Is the resistance of the target line.
In one specific embodiment, in order to determine the operation efficiency of the target line by using the line optimal load and the operation condition of the target line, the following steps may be specifically performed:
step S231: dividing the operation curve of the target line into M intervals according to time intervals; wherein M is a positive integer;
step S232: dividing the load of each interval by the optimal load of the line to obtain load rates of M intervals;
step S233: and carrying out weighted average on the load rates of the M intervals to obtain the operating efficiency of the target line.
The economic load factor of the distribution transformer has wide variation range and has great relation with the line structure, the line length, the wire section, the branch line layout and the like. Meanwhile, the number, capacity, model and the like of the transformers determine the equivalent resistance of the transformers, and the equivalent resistance of the transformers also has great influence on the economic load rate of the distribution line. The overall economic operation of the distribution line and the distribution transformer as a whole should be studied by considering the losses of the distribution transformer and the conducting wire at the same time, and considering the minimum total loss of the distribution transformer and the conducting wire as the optimal operation condition. The current optimal load is used for analyzing the transformer and the line independently, so that the optimal load calculation of the transformer and the line has deviation, and the operation efficiency of the power distribution network cannot be determined accurately.
The embodiment of the invention aims to provide a method for determining the operation efficiency of the main equipment of the power distribution network, which comprehensively considers the overall economic operation mode of a distribution line and a transformer and determines the optimal load as a determination reference so as to realize objective determination of the operation efficiency of the main equipment of the power distribution network.
Referring to fig. 4 and 5, fig. 4 is a flowchart of a method for determining an operation efficiency of a main device of a power distribution network according to an embodiment of the present invention; fig. 5 is a flow chart of the determination of the operating efficiency of the target transformer according to an embodiment of the present invention.
In another embodiment of the present invention, the target master device may be a target transformer; the additional master device is a line. That is to say, an embodiment of the present invention provides a method for determining an operation efficiency of a distribution network master device, where the method is used for a transformer, and the method includes:
step S41: acquiring basic parameters and operation conditions of a target transformer and basic parameters and a topological structure of a line related to the target transformer;
step S42: determining the optimal transformer load of a target transformer by using the basic parameters of the target transformer and the basic parameters and the topological structure of the line associated with the target transformer;
step S43: and determining the operation efficiency of the target transformer by using the optimal load of the transformer and the operation condition of the target transformer.
Wherein, the basic parameters of the target transformer comprise: rated capacity, no-load loss, short-circuit loss, equivalent resistance. The method comprises the steps of determining the optimal transformer load of a target transformer by using basic parameters of the target transformer and basic parameters and topological structures of lines related to the target transformer, and calculating the optimal transformer load by using the following formula:
wherein, P et For optimal loading of the transformer, P N Is the rated capacity of the target transformer, P 0 Is the no-load loss of the target transformer, P d For short path loss of the target transformer, R t Is the equivalent resistance, R, of the target transformer l Is the resistance of the line connected to the target transformer.
On the basis of the foregoing specific embodiment, to determine the operation efficiency of the target transformer by using the optimal load of the transformer and the operation condition of the target transformer, the following steps may be specifically performed:
step S431: dividing the operation curve of the target transformer into N intervals according to time intervals, wherein N is a positive integer;
step S432: dividing the load of each interval by the optimal load of the transformer to obtain the load rates of N intervals;
step S433: and carrying out weighted average on the load rates of the N intervals to obtain the operating efficiency of the target line.
According to the embodiment of the invention, the equivalent resistance of the distribution line connected with the transformer is considered in the optimal load calculation mode of the transformer; in the optimal load calculation mode of the distribution line, the equivalent resistance of a distribution transformer connected with the distribution line is considered; and finally, the operation efficiency of the transformer and the distribution line is determined based on the optimal load, the distribution line and the distribution transformer are taken as a whole, the overall economic operation mode is calculated, the optimal load of the distribution line and the transformer can be analyzed and obtained, and the objective determination of the operation efficiency of the distribution network main equipment is realized.
Referring to fig. 6 and 7, fig. 6 is a schematic structural diagram of a system for determining an operation efficiency of a main device of a power distribution network according to an embodiment of the present invention; fig. 7 is a schematic structural diagram of an operation efficiency determination module of an operation efficiency determination system for a power distribution network master device according to an embodiment of the present invention.
In one embodiment of this disclosure, an embodiment of the present invention provides a system 600 for determining an operating efficiency of a main device of a power distribution network, including:
a parameter obtaining module 610, configured to obtain basic parameters and operating conditions of the target master device and basic parameters and a topology structure of an additional master device associated with the target master device;
an optimal load determining module 620, configured to determine an optimal load of the associated additional master device by using the basic parameters of the target master device and the basic parameters and topology of the associated additional master device;
an operation efficiency determining module 630, configured to determine an operation efficiency of the target master device by using the optimal load and the operation condition of the target master device.
Preferably, the first and second electrodes are formed of a metal,
the operation efficiency determining module 630 includes:
the interval dividing unit 631 is configured to equally divide the operation curve of the target master device into N intervals according to a time interval, where N is a positive integer;
a load rate calculation unit 632, configured to divide the load of each interval by the optimal load of the target master device, to obtain load rates of N intervals;
and the efficiency weighting unit 633 is configured to perform weighted average on the load ratios of the N intervals to obtain the operating efficiency of the target line.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a computer device according to still another embodiment of the present invention.
In another embodiment of the present invention, a computer device includes:
a memory for storing a computer program;
a processor, configured to implement the steps of the method for determining an operation efficiency of a power distribution network master device according to any of the above embodiments when executing the computer program.
Reference is now made to FIG. 8, which illustrates a schematic block diagram of a computer device suitable for use in implementing embodiments of the present application. The computer device shown in fig. 8 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.
As shown in fig. 8, a computer system 800 includes a processor (CPU)801 that can perform various appropriate actions and processes in accordance with a program stored in a Read Only Memory (ROM)802 or a program loaded from a storage section 808 into a Random Access Memory (RAM) 803. In the RAM 803, various programs and data necessary for the operation of the system 800 are also stored.
The CPU 801, ROM 802, and RAM 803 are connected to each other via a bus 804. An input/output (I/O) interface 803 is also connected to bus 804.
The following components are connected to the I/O interface 805: an input portion 806 including a keyboard, a mouse, and the like; an output section 807 including a signal such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage portion 808 including a hard disk and the like; and a communication section 809 including a network interface card such as a LAN card, a modem, or the like. The communication section 809 performs communication processing via a network such as the internet. A drive 810 is also connected to the I/O interface 807 as necessary. A removable medium 811 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 810 as necessary, so that a computer program read out therefrom is mounted on the storage section 808 as necessary.
In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program can be downloaded and installed from a network through the communication section 809 and/or installed from the removable medium 811. The computer program, when executed by the processor (CPU)801, performs the above-described functions defined in the method of the present application. It should be noted that the computer readable medium described herein can be a computer readable signal medium or a computer readable medium or any combination of the two. A computer readable medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable medium may include, but are not limited to: an electrical connection having 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 portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, a computer readable medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In this application, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server.
In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
As another specific implementation manner of the present invention, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the step of determining the operation efficiency of the power distribution network master device in any of the above specific implementation manners is implemented.
The computer-readable medium may be included in the computer or the terminal device described in the above embodiments; or may exist separately and not be incorporated into the computer device. The computer readable medium carries one or more programs which, when executed by the computing device, cause the computing device to: acquiring basic parameters and operation conditions of target main equipment and basic parameters and topological structures of additional main equipment related to the target main equipment; determining the optimal load of the associated additional main equipment by using the basic parameters of the target main equipment and the basic parameters and the topological structures of the associated additional main equipment; and determining the operation efficiency of the target main equipment by using the optimal load and the operation condition of the target main equipment. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The method for determining the operation efficiency of the main equipment of the power distribution network and the related products are described in detail, specific examples are applied in the method for explaining the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. A method for determining operation efficiency of a main device of a power distribution network is characterized by comprising the following steps:
acquiring basic parameters and operation conditions of target main equipment and basic parameters and topological structures of additional main equipment related to the target main equipment;
determining the optimal load of the additional main equipment associated with the target main equipment by using the basic parameters of the target main equipment and the basic parameters and the topological structure of the additional main equipment associated with the target main equipment;
determining the operation efficiency of the target main equipment by using the optimal load and the operation condition of the target main equipment;
the target master device is a target line;
the additional main equipment is a transformer;
determining the optimal line load of a target line by using the basic parameters of the target line and the basic parameters and the topological structure of a transformer associated with the basic parameters, wherein the method comprises the following steps:
the line optimum load is calculated using the following equation:
wherein, P el For optimum loading of the line, U N Is the rated voltage of the target line, k is the load curve shape coefficient of the target line, P 0 For no-load losses of transformers, R t Is the equivalent resistance, R, of the transformer l Resistance of the target line;
alternatively, the first and second electrodes may be,
the target main equipment is a target transformer;
the additional main equipment is a line;
determining the optimal transformer load of a target transformer by using the basic parameters of the target transformer and the basic parameters and the topological structure of a line associated with the target transformer, wherein the method comprises the following steps:
the optimal load of the transformer is calculated using the following formula:
wherein, P et For optimal loading of the transformer, P N Is the rated capacity of the target transformer, P 0 Is the no-load loss of the target transformer, P d For short-circuit losses of the target transformer, R t Is the equivalent resistance, R, of the target transformer l Is the resistance of the line connected to the target transformer.
2. The method of claim 1,
the determining the operation efficiency of the target master device by using the optimal load and the operation condition of the target master device includes:
dividing the operation curve of the target main equipment into N intervals according to time intervals, wherein N is a positive integer;
dividing the load of each interval by the optimal load of the target main equipment to obtain the load rates of N intervals;
and carrying out weighted average on the load rates of the N intervals to obtain the operating efficiency of the target main equipment.
3. A power distribution network master device operational efficiency determination system, comprising:
the parameter acquisition module is used for acquiring basic parameters and running conditions of the target main equipment and basic parameters and topological structures of the additional main equipment related to the target main equipment;
the optimal load determining module is used for determining the optimal load of the associated additional main equipment by utilizing the basic parameters of the target main equipment and the basic parameters and the topological structures of the associated additional main equipment;
the operation efficiency determining module is used for determining the operation efficiency of the target main equipment by using the optimal load and the operation condition of the target main equipment;
the target master device is a target line;
the additional main equipment is a transformer;
the optimal load determination module calculates the optimal load of the line by using the following formula:
wherein, P el For optimum loading of the line, U N Is the rated voltage of the target line, k is the load curve shape coefficient of the target line, P 0 For no-load losses of transformers, R t Is the equivalent resistance, R, of the transformer l Resistance of the target line;
alternatively, the first and second electrodes may be,
the target main equipment is a target transformer;
the additional main equipment is a line;
the optimal load determining module calculates the optimal load of the transformer by using the following formula:
wherein, P et For optimal loading of the transformer, P N Is the rated capacity of the target transformer, P 0 Is the no-load loss of the target transformer, P d For short-circuit losses of the target transformer, R t Is the equivalent resistance, R, of the target transformer l Is the resistance of the line connected to the target transformer.
4. The power distribution network master device operational efficiency determination system of claim 3,
the operating efficiency determination module includes:
the interval dividing unit is used for equally dividing the operation curve of the target main equipment into N intervals according to time intervals, wherein N is a positive integer;
the load rate calculation unit is used for dividing the load of each interval by the optimal load of the target main equipment to obtain the load rates of N intervals;
and the efficiency weighting unit is used for carrying out weighted average on the load rates of the N intervals to obtain the operating efficiency of the target main equipment.
5. An electrical distribution network master device operational efficiency determining device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method for determining the operational efficiency of a master device of an electrical distribution network according to any one of claims 1 to 2 when executing the computer program.
6. A computer-readable storage medium, having a computer program stored thereon, which, when being executed by a processor, carries out the steps of the method for determining an operational efficiency of a main device of an electrical distribution network according to any one of claims 1 to 2.
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