阅读说明：本技术 一种基于中压载波耦合器阻抗自适应实现方法 (Impedance self-adaption realization method based on medium-voltage carrier coupler ) 是由 徐剑英 盛云 李亮 郭怀林 骆志雄 闫庆鑫 季册 于 2021-01-26 设计创作，主要内容包括：本发明提供一种基于中压载波耦合器阻抗自适应实现方法,其中阻抗自适应的实现,是依托中压载波通信系统建立起正常的通信,从而实现中压载波耦合器对载波信号的实时采样,并将线路中的载波信号转换为数字信号,然后进行判决,并根据判决结果将系统中的匹配阻抗切换到合适的挡位,当电力载波通信环境发生变化时,实现中压载波通信阻抗自动匹配,提高了电力载波通信的成功率,提升了用电信息采集以及各种相关业务的效率。(The invention provides an impedance self-adaption realization method based on a medium-voltage carrier coupler, wherein the impedance self-adaption realization is realized by establishing normal communication by relying on a medium-voltage carrier communication system, so that the medium-voltage carrier coupler can sample carrier signals in real time, the carrier signals in a line are converted into digital signals, then judgment is carried out, the matching impedance in the system is switched to a proper gear according to a judgment result, when the power carrier communication environment changes, the medium-voltage carrier communication impedance automatic matching is realized, the success rate of power carrier communication is improved, and the efficiency of power utilization information acquisition and various related services is improved.)

1. A realization method based on medium-voltage carrier coupler impedance self-adaptation is characterized in that under the condition of normal communication of a medium-voltage carrier communication system, real-time sampling is carried out on carrier signals in a line, the collected carrier signals are converted into digital signals, and the impedance gear is judged and controlled to be switched according to the data signals, so that the medium-voltage carrier coupler impedance self-adaptation function is realized, and the method specifically comprises the following steps:

step a: collecting a line carrier signal to obtain a carrier signal amplitude under the current environment;

step b: converting the carrier signal from analog quantity to digital quantity;

step c: comparing the converted data with a set value, adjusting the current gear through a decision algorithm and an anti-false switching mechanism, executing the step d if the current gear is larger than the set value, executing the step e if the current gear is smaller than the set value, and executing the step f within the range of the set value;

d, adjusting the impedance gear of the coupler to the adjacent lower first gear position;

e, adjusting the impedance gear of the coupler to the position of the adjacent high first gear;

and f, keeping the current gear unchanged.

2. The method as claimed in claim 1, wherein the decision algorithm continuously collects N digital quantities, performs weighted summation and then averages the values, compares the averaged values with values in a truth table, and switches to a corresponding gear.

3. The method as claimed in claim 1, wherein the false switching prevention mechanism is to enter a slow switching range when the switching is continuously performed for more than five times within t seconds, reduce the switching frequency, change to a fast switching range after no switching is performed within 20 minutes, and only allow switching to an adjacent range during switching.

Technical Field

The invention belongs to the technical field of electric power, and particularly relates to an impedance self-adaption realization method based on a medium-voltage carrier coupler.

Background

With the continuous promotion of national electric power infrastructure and the continuous extension of an electric power network, the environment of an electric power carrier communication network is more and more complex and changeable, and the communication success rate of interference of the electric power line carrier caused by the change of impedance on a carrier line due to the change of an external environment may exist. Therefore, when the communication success rate is influenced by impedance change caused by external environment change, the impedance can be matched again in an impedance self-adaption mode, so that the communication success rate of the power line carrier is improved.

Supplement the technical solution similar to the present invention and describe the deficiency or disadvantage of the prior art, and the deficiency and disadvantage should be corresponding to the advantage of the present invention.

The invention can realize impedance self-adaption through the medium-voltage carrier coupler when the success rate of carrier communication is reduced due to the change of the environment in the carrier environment through power line carrier communication, thereby ensuring the normal communication of the carrier and simultaneously improving the success rate of communication.

Disclosure of Invention

In order to solve the problems, the invention provides an impedance self-adaption realization method based on a medium-voltage carrier coupler, which is characterized in that normal communication is established by relying on a medium-voltage carrier communication system, so that the medium-voltage carrier coupler can sample carrier signals in real time, the carrier signals are converted into digital signals, judgment is carried out, the impedance in the system is switched to a proper gear according to a judgment result, the normal communication of the carrier is ensured, and the communication success rate is improved.

In order to achieve the above object, the present invention provides an adaptive implementation method based on medium voltage carrier coupler impedance, which specifically includes:

step a: collecting a line carrier signal to obtain a carrier signal amplitude under the current environment;

step b: converting the carrier signal from analog quantity to digital quantity;

step c: comparing the converted data with a set value, adjusting the current gear through a decision algorithm and an anti-false switching mechanism, executing the step d if the current gear is larger than the set value, executing the step e if the current gear is smaller than the set value, and executing the step f within the range of the set value;

d, adjusting the impedance gear of the coupler to the adjacent lower first gear position;

e, adjusting the impedance gear of the coupler to the position of the adjacent high first gear;

and f, keeping the current gear unchanged.

Furthermore, a decision algorithm continuously collects N digital quantities, carries out weighted summation and then calculates an average value, compares the average value with a numerical value in a truth table, and switches to a corresponding gear.

Furthermore, the anti-false switching mechanism is to enter a slow switching gear when the continuous switching is more than five times within t seconds, reduce the switching frequency, change the gear to a fast switching gear after the switching is not performed within 20 minutes, and only operate to switch to the adjacent gear during the gear switching.

The invention has the beneficial effects that: by means of the power communication network, the power energy network is built into the power communication network, and by means of the power communication network, when the power carrier communication environment changes, the automatic impedance matching of medium-voltage carrier communication is realized, the success rate of power carrier communication is improved, and the efficiency of power utilization information acquisition and various related services is improved; the real-time performance is high, the automatic switching of impedance is realized quickly, and the stability of signal transmission is ensured.

Drawings

FIG. 1 is a schematic diagram of an adaptive implementation method of the invention based on medium voltage carrier coupler impedance;

fig. 2 is a flowchart of an adaptive implementation method based on the medium voltage carrier coupler impedance.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

As shown in fig. 1, the present invention implements impedance self-adaptation based on a medium voltage carrier master module, a master end coupler, a medium voltage carrier slave module, and a slave end coupler, wherein the medium voltage carrier master module and the medium voltage carrier slave module are respectively connected to the master end coupler and the slave end coupler through signal lines, and the master end coupler and the slave end coupler are connected to a power line through the power line to perform normal communication through the power line. The impedance self-adaption function of the master end coupler and the slave end coupler is divided into three modules, namely: the device comprises a signal acquisition module, a data processing unit and an impedance automatic switching module.

As shown in fig. 2, a flowchart of the steps for implementing the coupler impedance adaptation specifically includes the following steps:

step a: collecting line carrier signals through a signal sampling module;

step b: converting the carrier signal from analog quantity to digital quantity through an analog-to-digital conversion module;

step c: comparing the converted data with a set value, executing the step d if the converted data is larger than the set value, executing the step e if the converted data is smaller than the set value, and executing the step f within the range of the set value;

d, adjusting the impedance gear of the coupler to the adjacent lower first gear position;

e, adjusting the impedance gear of the coupler to the position of the adjacent high first gear;

and f, keeping the current gear unchanged.

Finally, it should be noted that: the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and a person of ordinary skill in the art can make modifications or equivalents to the specific embodiments of the present invention with reference to the above embodiments, and such modifications or equivalents without departing from the spirit and scope of the present invention are within the scope of the claims of the present invention as set forth in the claims.