A Method for Automatically Determining the Optimum Operating Frequency of a Single-Wire Power Transmission System

Abstract

The invention relates to a method for automatically determining the optimum working frequency of a single-line electric energy transmission system, and belongs to the field of electric power engineering. The method comprises the steps that a frequency band where the optimum working frequency of the single-line electric energy transmission system is located is preliminarily determined according to a secondary LC parallel equivalent circuit of a transmitting Tesla coil, an input impedance modulus of the transmitting Tesla coil at different frequencies in the frequency band is measured, the bandwidth of the measurement frequency band is gradually reduced with an objective of acquiring a minimal value of the input impedance modulus according to a measurement result, and the optimum working frequency of the single-line electric energy transmission system can be determined when the bandwidth precision meets requirements. When working conditions of the system are changed, the input impedance modulus of the transmitting Tesla coil is measured again near the original optimum working frequency, and the optimum working frequency after migration can be determined according to the above method for reducing the bandwidth of the measurement frequency band. The method provided by the invention can determine the optimum working frequency of the single-line electric energy transmission system quickly and accurately.

Description

technical field [0001] The invention provides a method for automatically determining the optimal operating frequency of a single-wire power transmission system, which belongs to the field of electric power engineering. Background technique [0002] Single-wire power transmission system, that is, only one wire is used to connect the transmitting device and the receiving device, and the transmission of electric energy is realized without forming a loop. When the wire is replaced by a natural medium such as the earth, a generalized "wireless "Power transmission, which can solve problems that cannot be solved by wired power transmission technology and wireless power transmission technology at present, or are difficult to solve. [0003] In a single-wire power transmission system, the amount of power obtained by the load is significantly affected by the operating frequency. It is generally believed that the corresponding operating frequency when the load can obtain the maximum po...

AI Technical Summary

Problems solved by technology

At present, there is no relevant literature that can explain the working principle of the single-wire power transmission system in detail. Therefore, few scholars have studied the single-wire power transmission system, and no one has proposed a method to determine the optimal operating frequency of the single-wire power transmission system.

In addition, as far as the system with the optimal operating frequency has been determined, when the operating conditions of the system change, such as the change of the transmission distance, or the change of the load connected to the receiving device, the optimal operating frequency of the system will have a certain deviation from that before the change. If the system still works at the frequency before the change, the load will not be able to obtain the maximum power

[0004] It can be seen that in order to determine the optimal operating frequency of the single-wire power transmission system and solve the problem of the optimal operating frequency offset caused by the change of the system's working conditions, it is necessary to propose a method for automatically determining the operating frequency of the single-wire power transmission system.

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