CN-115795600-B - Arrangement position selection method and system of energy taking device based on voltages at two ends of ground wire insulator

Abstract

The invention discloses an energy taking device arrangement position selection method and system based on voltages at two ends of a ground wire insulator, comprising the following steps of obtaining a preliminary influence factor of energy taking power, optimizing the preliminary influence factor, and obtaining an optimized influence factor; the method comprises the steps of analyzing an influence rule of optimized influence factors on energy taking power, constructing an objective function based on the obtained influence rule and the optimized influence factors, obtaining a strain section capable of enabling the energy taking power to be maximum, and selecting an arrangement position of an energy taking device based on the obtained strain Zhang Duanxuan. Compared with the prior art, the method has the advantages that the maximum energy taking position can be quickly found, time and labor are saved, the energy taking position obtained by the method can better utilize electromagnetic induction energy on a ground line, and the method has high applicability and universality and can be applied to power transmission lines with different voltage levels.

Inventors

• SHEN WEI
• LI LIANG
• ZHANG PENG
• REN BO
• LIU JIAOJIAN
• LIU TAO
• LI XINMIN
• LIANG ZHIGUO
• WANG CHENXI
• XIA YINGSHENG
• WANG SEN
• ZHANG BO
• CUI ZHERUI
• ZHU MINGXI
• LI ZHIZHONG
• LI WEI
• YU YILIANG
• YAN KEWEI

Assignees

• 国网陕西省电力有限公司电力科学研究院

Dates

Publication Date

20260508

Application Date

20221108

Claims (6)

1. 1. The method for selecting the arrangement position of the energy taking device based on the voltages at two ends of the ground wire insulator is characterized by comprising the following steps of: S1, acquiring a primary influence factor of energy taking power, and optimizing the primary influence factor to obtain an optimized influence factor; S2, analyzing an influence rule of the optimized influence factors on the energy-taking power; S3, constructing an objective function based on the obtained influence rule and the optimized influence factors, and obtaining a strain section with the maximum energy-taking power; s4, selecting the arrangement position of the energy-taking device based on the acquired Zhang Duanxuan tolerance; In the step S1, the preliminary influencing factors of the energy capturing power include: the self-impedance of the OPGW ground wire and the common ground wire, the vortex induced potential on the OPGW ground wire and the common ground wire, the size of the energy-taking load and the size of the tower grounding resistance; in the step S1, the optimized influencing factors include: The tower grounding resistance, the average span of the line in the strain section, the average distance between the conductive wires and the ground wires, the average distance between the ground wires and whether the wires in the strain section are transposed or not; In the step S2, assuming that the number of towers included in each strain section in the power transmission line is equal, an influence rule of influence factors on the energy taking rule is analyzed: the energy-taking power is reduced along with the reduction of the grounding resistance of the pole tower; The energy-taking power is in direct proportion to the average span change of the line in the tension-resisting section; when the average distance between the ground wires is increased, the energy-taking power is increased; When the average distance between the ground wires is increased, the energy taking power is weakened; when the wires in the tension section are transposed, the energy-taking power is reduced; In the step S3, the objective function is constructed as follows: Wherein k is a wire current coefficient, a is a ground wire radius coefficient, b is a ground wire internal resistance coefficient, R represents a tower ground average resistance, x represents an average span of a wire in a strain section, d represents an average distance between ground wires, h represents an average height difference between the wire and the ground wires, m represents a wire transposition condition in the strain section, no wire transposition in the strain section is recorded as m=1, and a wire transposition is recorded as m= Wherein N is the position of the transposition point, and N is the total grade number in the tension-resisting section.
2. 2. The method for selecting the arrangement position of the energy taking device based on the voltage across the ground insulator according to claim 1, wherein the step S4 comprises the steps of: based on the obtained maximum strain section, the energy taking power of different energy taking sites in the same strain section is calculated in a simulation mode, and the final arrangement position of the energy taking device is obtained according to the comparison result of the energy taking power.
3. 3. The method for selecting the arrangement position of the energy taking device based on the voltage across the ground wire insulator according to claim 2, wherein the arrangement position of the selected energy taking device is the position of the tower farthest from the segment insulator.
4. 4. An energy taking device arrangement position selection system based on the voltage at two ends of a ground wire insulator for realizing the method of claim 1 is characterized by comprising an influence factor acquisition module, an influence factor analysis module, an objective function construction module and an arrangement position determination module; the influence factor acquisition module is used for acquiring a preliminary influence factor of the energy taking power, optimizing the preliminary influence factor and obtaining an optimized influence factor; the influence factor analysis module is used for analyzing the influence rule of the optimized influence factors on the energy-taking power; the objective function construction module is used for constructing an objective function based on the obtained influence rule and the optimized influence factors and obtaining a strain section with the maximum energy taking power; and the arrangement position determining module is used for selecting the arrangement position of the energy taking device based on the acquired Zhang Duanxuan tolerance.
5. 5. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1-3 when the computer program is executed.
6. 6. A computer readable storage medium storing a computer program, which when executed by a processor performs the steps of the method according to any one of claims 1-3.

Description

Arrangement position selection method and system of energy taking device based on voltages at two ends of ground wire insulator Technical Field The invention belongs to the technical field of high voltage, and relates to an energy taking device arrangement position selection method and system based on voltages at two ends of a ground wire insulator. Background The power transmission line on-line monitoring equipment is arranged on a tower or a wire of the line and has scattered positions, so that the power transmission line on-line monitoring equipment cannot directly supply power by utilizing a power grid or a distribution network terminal like other equipment. How to stably and effectively supply power to an on-line monitoring device on a power transmission line has become one of the important problems in the development of an on-line monitoring technology. Common power supply modes of the on-line monitoring equipment of the power transmission line comprise a small wind driven generator, a solar battery, a special power supply low-voltage line, wireless power supply and the like, but the power supply modes are influenced by factors such as geography, weather, cost, volume, output power, insulation and the like, and the power consumption requirements of the on-line monitoring equipment and related communication equipment cannot be met well. In order to solve the power supply problem of the on-line monitoring device, a learner proposes to use a current transformer (Current Transformer, abbreviated as CT) to supply power to the device on line based on the phase conductor current, but the above manner cannot supply power to the device at a low potential (such as a monitoring device on a tower or a ground line). In order to prevent the transmission conductor from being directly struck by lightning, an overhead line of 110kV or above is generally provided with a lightning conductor, namely a ground wire. Under the influence of static electricity and electromagnetic induction effect, induced voltage and induced current exist on the ground wire stably, and then related electric energy loss is introduced. Taking a 1000km 750kV transmission line as an example, the electric energy loss on the ground wire for one year is up to 2X 10 7 kWh. The scholars put forward to utilize the energy to supply power for the on-line monitoring equipment, and the method can be particularly divided into the energy taking based on electrostatic induction and the energy taking based on electromagnetic induction, and provides a new idea for the power supply problem of the on-line equipment by utilizing ground wire induction. The method for taking energy based on the electromagnetic induction of the ground wire mainly comprises two methods, namely taking energy based on the voltages at two ends of the ground wire insulator and taking energy by using the ground wire induction current and CT. The mode of taking energy based on voltages at two ends of the ground wire insulator is mainly oriented to the ground wire with segmented insulation, and the mode of taking energy based on ground wire induced current and CT is mainly oriented to the ground wire with tower-by-tower grounding. At present, researches on ground wire energy taking mainly pay attention to calculation of energy taking power and design of an energy taking device, few researches pay attention to influence of different arrangement positions of the energy taking device on the energy taking power, and research and calculation show that even if the energy taking power difference can be several times under the arrangement positions of different ground wire energy taking devices in one strain section of a power transmission line, in the existing method, according to different ground wire operation modes, the ground wire energy taking scheme and the arrangement positions of the ground wire energy taking devices cannot be quickly selected and determined, and electromagnetic induction energy on a ground wire cannot be better utilized. Disclosure of Invention The invention aims to solve the problems that in the prior art, a selection method for the installation position of a ground wire energy taking device is lacking, an optimal energy taking position cannot be quickly found when the energy taking device is arranged, the selection of the energy taking position is time-consuming and labor-consuming, and the utilization rate of electromagnetic induction energy on a ground wire is low, and provides an energy taking device arrangement position selection method and system based on voltages at two ends of a ground wire insulator. In order to achieve the purpose, the invention is realized by adopting the following technical scheme: an energy taking device arrangement position selection method based on voltages at two ends of a ground wire insulator comprises the following steps: S1, acquiring a primary influence factor of energy taking power, and optimizing the primary influence factor to obta