Low Voltage Power Line Carrier Research Articles

Research and analysis on noise characteristics of low voltage power lines carrier communication

Noise is one of the most important factors affecting the reliability of low-voltage power line carrier communication. In order to fully grasp the noise characteristics, a channel analysis equipment has been designed to collect and analyze noise. The analysis results show that power line noise is mostly manifested as a combination of colored background noise and pulse noise, mainly concentrated in the frequency band below 700kHz. Compared with the low peak period of electricity consumption, the peak period has stronger time-varying noise, larger amplitude of background noise, richer components of pulse noise, and there is also jitter in the duration of periodic pulse noise.

Design and Research of Channel Circuit Based on Broadband Power Line Carrier

In order to effectively improve the anti-attenuation, anti-noise and anti-impedance change capabilities of the low-voltage narrowband power line carrier communication unit, reduce the carrier signal coupling attenuation, and highly fidelity signal power encoded and modulated by the carrier chip, an improved high-speed power line carrier communication transceiver circuit is designed. Using 303.13kHz~357.81kHz as sub-carrier signal frequency can effectively avoid the random noise generated by high-power power electronic equipment and household appliances below 35kHz. At the same time, to prevent the frequency crosstalk of power line carrier products with 270kHz and 421kHz as the center frequency, the Y-coupling capacitor and sixth order Butterworth band-pass filter circuit are used to design the signal receiving and transmitting circuit of the communication unit to isolate unwanted signals. The experimental simulation of the designed circuit is carried out on the circuit simulation software Multisim 12. The results show that the designed power line carrier communication transceiver circuit can effectively control the signal coupling attenuation within 4dB, and the filtering of unwanted signals can also reach 41.7dB, which has good application value.

Noise Reduction Method for Low Voltage Power Line Carrier Communication

In order to improve the performance of electricity information collection system, this paper studies and proposes a new method of low-voltage power line carrier signal frequency domain noise reduction. It includes frequency domain decomposition of carrier signal, filtering noise reduction and signal frequency domain restoration. Then compared our method with the wavelet packet noise reduction method based on multi-resolution. The experimental results show that the proposed algorithm is better than the comparison algorithm under different modulation modes and carrier frequencies, especially suitable for carrier signal noise reduction under bad channel conditions. The algorithm proposed in this paper has good anti signal attenuation performance, and it can effectively enhance the SNR, and ensure the transmission performance and system reliability of the electricity information collection system.

Real-time fault diagnosis method for low-voltage power line carrier communication network based on network topology

Real-time fault diagnosis method for low-voltage power line carrier communication network based on network topology

Real-time fault diagnosis method for low-voltage power line carrier communication network based on network topology

In order to overcome the problems of long diagnosis time, high cost and low accuracy in traditional communication network fault diagnosis methods, a real-time fault diagnosis method based on networ...

Simulation and Experimental Study of Low Voltage Power Line Carrier Communication

This paper presents the simulation and experimental research of low-voltage power line carrier communication. The choice of communication method is an important factor in determining the communication quality of the communication system. For the communication mode of low-voltage power line as carrier, this paper prefers the direct sequence spread spectrum communication system as the communication method. In this paper, the simulation function is realized by establishing various parts of the system simulation model. The simulation reflects the stability of the direct sequence spread spectrum communication system and has strong anti-interference ability. In this paper, the spread spectrum communication method is used to simulate low-voltage power line communication in the laboratory environment, and good results are also obtained. The direct sequence spread spectrum communication system is a better choice for low voltage power line carrier communication.

Research and Application of Transformer-User Identification Technology Based On Fault Diagnosis of Electrical Information Acquisition Equipment

The line loss rate of power supply enterprises is an important economic and technical index, which directly reflects the lean level of marketing professional management of power supply enterprises. At present, the confusion of transformer-user archives in transformer area is still widespread, which is a key issue in line loss management in power supply enterprises. As the downlink communication channel, low-voltage power line carrier can realize cross-station reading, which brings great difficulties to the identification of transformer-user relation. Because the data of calculating the line loss rate of the transformer area depends on the electrical information acquisition system, the running state of the electrical information acquisition equipment is also one of the important factors affecting the line loss rate of the transformer area. This paper will focus on the fault diagnosis technology of electrical information acquisition equipment, and use it to carry out the identification of transformer-user transformers.

Applying Deep Learning Method to Data Analysis of Low Voltage Line Carrier Module

With the increasing popularity of the global energy Internet, the smart grid in the city has developed rapidly, and the number of smart energy meters is increasing year by year. The demand for detecting the carrier module of the power meter has also increased to a new level. But the existing carrier module data analysis scheme is not perfect. It is urgent to need a complete set of carrier module data analysis scheme and new detection technology to realize the multiplexing of carrier module data, and to excavate the value of the carrier module to detect the data. Unlike previous studies, which using SVM and Bayesian networks, this paper proposes a scheme for classification of carrier module detection data using a deep learning network. GRU deep neural network is used to model the test data and identify the environment automatically. According to the recognition results, the carrier module can be adjusted accordingly. Experiments show that the scheme proposed in this paper has good results. Our scheme has very good effect in low voltage power line carrier communication data analysis task. It can excavate valuable information of low voltage power line carrier communication and has high economic value. In addition, the technical solutions proposed in this paper will not affect the existing business processes, and can be applied in large areas.

Research on the Characteristics of the Low Voltage Power Line Carrier Communication Channel

Research on the Characteristics of the Low Voltage Power Line Carrier Communication Channel

Research on automatic network based on low voltage power line carrier

To improve the power line communication distance, shorten the networking time and the reliability of the system communication, a method based on the clustering algorithm to change the network time and based on the distance between nodes is proposed in this paper. Firstly, the physical structure and logical topology of the low-voltage power line network are described in details. Then, the clustering algorithm and the method of route reconstruction are described. Finally, the method is simulated and analyzed. The results show that the proposed method can not only reduce network time, but also improve the communication stability of nodes within the network.

Remote Monitoring System of Piggery Microclimate Based on Low Voltage Power Line Carrier

Remote Monitoring System of Piggery Microclimate Based on Low Voltage Power Line Carrier

Transformer Region Customer Information Detection System

Aim at solving the electricity customer unclear ownership problems in some old city area, the transformer region customer information detection system was designed, using low voltage power line carrier (PLC) technology to detect transformer of the connectivity of concentrator and the collector within their respective jurisdictions, and further determined the dependencies of the electric power customer and concentrator, displayed results in the information management server. The system consists of the customer information detection terminal and the customer information management software. The experimental results show that the system can actually solve the issues of mixed customer information under the complex line loss problem.

Transformer Region Customer Information Management System Design

In order to clarify the relationship between concentrator and collector in some Transformer Regions, the transformer region customer information management system was proposed based on a low voltage power line carrier technology. The system consists of the customer information detection terminal and the customer information management software. Detection terminal achieves the detection of relationship between concentrator and collector, within the scope of the common variants, through power line carrier communication technology, and sends the information to the information management server. Customer information management software managed the information ,which came from the terminal, using a database technology and displayed the results sorted, achieving the functions of detection terminal—parameter settings, data management, communication function, management functions for user rights. GPRS mobile public transport networks were used to keep communication between the terminal and information management software.

Characteristic Study on Carrier Communication Device Noise of Low Voltage Power Lines Based on UPS

Low-voltage power lines are not designed to transmit communication data; it is not ideal channel characteristics using power line as a data communication medium, especially the noise generated by the several of household electrical appliances will have a significant impact on the power line communication system. First, low-voltage power line carrier communication and channel noise characteristics are analyzed, and based on pure electricity environment UPS, the experimental results obtained with different electric appliances for data processing, and analyze the impact of the electric appliances noise on the power line carrier communication.

Design of Three-Phase Multi-Function Energy Meter Based on Measurement Chip RN8302

According to the development status of the energy meter, we put forward a design of a Three-phase multi-function energy meter based on professional measurement chip RN8302 and High-performance single chip microcomputer MSP430 in this article. It has the characteristics which are low-power consumption, high-precision and electricity anti-theft. It could also real-time measured current, voltage, active power, reactive power, power factor, over-voltage and over-current signal. The design also has the functions of surge prevention, lightning prevention and voltage protection, improving the overall safety and reliability of the system.Use the Low-voltage power line carrier communication, there is no need to build another peripherals,saving the cost of grid investment. The article also gave the overall design scheme and the main hardware principle Schematic.

FFU Motors Remote Monitoring System Based on Power Line Communication and GPRS

In view of the advantage of low voltage power line carrier technique and general packet radio service(GPRS), a solution of fan filter unit(FFU) motor remote mointoring system based on GPRS and low voltage power line communication is introduced. This system combines a framework of low voltage power line communication and GPRS network with host computer monitoring center, which changes the traditional FFU motor control mode, and realize FFU motor remote real-time on-line automatic monitoring.The system implementation methods were described in detail, and the hardware and sofware design were given.The test and practice showed that the proposed has higher efficient and stronger anti-interference capability, which met the requirements of networkization and intelligentization, and a better way for the FFU motor control. The designed system has good application value.

Power Line Carrier Detection System Based on Virtual Instrument

Low-voltage power line carrier (PLC) communication has received wide attention. However, testing standards are not well defined for PLC communication yet, and there are no professional, systematic and comprehensive detection indicators to measure and evaluate the quality of PLC communication. This paper proposed a low-voltage power line carrier communication evaluation system based on Virtual Instrument (VI). Simulation results revealed that the proposed system could precisely reflect the quality of the PLC communication.