Research On Medium Frequency Power Line Broadband Communication Technology And Its Security For Power Distribution And Utilization Services

With the continuous advancement of the energy Internet strategy,Internet technology has gradually penetrated into the traditional power distribution business field,giving birth to many new businesses,new models,and new scenarios.For example,traditional power users have become the “prosumer”(power production + power consumption).The substantial reduction in the cost of new energy power generation makes it possible to “partition sell electricity”.These new business formats have put forward new requirements on power distribution information and communication technology,especially in the field of network information security.It is necessary to study autonomous and controllable Broadband Communication technology,network security technology,and information security suitable for new power distribution services.Powerline Communication is a technology that transmits information through electric wires as a medium.Power supply lines are ubiquitous.This technology has the unique advantages of low cost,no wiring,and ready to use electricity.It is widely used in electricity information collection,smart homes,and street lamp control.The core components of Powerline Communication are communication chips.Traditional Broadband Powerline Communication chips basically rely on technologies from developed countries such as Europe,America and Japan.China lacks independent intellectual property technology and products,and faces problems such as high power consumption,high costs,and difficulties in networking.Therefore,in response to the above-mentioned difficulties,the paper innovatively proposed the “medium frequency band” theory of Powerline Communication and carried out research according to the idea of “communication channel construction--communication network security protection--communication terminal data privacy protection”.The specific research content and innovation work are as follows:Firstly,aiming at the channel environment of domestic power distribution network,the field test and channel modeling of medium frequency Broadband Powerline Communication are carried out in this paper.Through the accumulation of a large number of field channel tests,the2～12MHz frequency channel characteristics are analyzed and modeled,the physical layer channel coding method and flexible sub-carrier synchronization of Orthogonal Frequency Division Multiplexing(OFDM)system is improved.Further form the theory and method of medium frequency band.Combined with core technologies such as signaling networking technology,Inter-System Protocol(ISP)sleep wake-up technology,digital-analog integration technology of independent intellectual property rights,System integration verification is carried out to achieve the overall optimization of anti-attenuation,anti-noise,power consumption and cost.By using independent controllable technology,the security of medium frequency Broadband Powerline Communication with high performance and low cost is realized,and the IEEE standard is formed.Through laboratory tests on two application scenarios of electricity consumption information collection and active reporting of power meter outage events,it is shown that the medium frequency Broadband Powerline Communication technology can greatly improve the performance of power distribution services.The adoption of medium frequency Broadband Powerline Communication technology solves the problems of large bandwidth,high reliability and wide connection of power distribution network,strongly supports the construction of energy Internet,and also gives birth to some new interactive power distribution services involving multiple subjects.In order to ensure the network security of power distribution business,the paper also studies the practical technology and core business characteristics of power quantum secure communication,and proposes a new generation of distribution network communication architecture with high security characteristics to realize the anti-theft,anti-leakage and anti-tampering of new power distribution information transmission.Based on the actual distribution network lines and test environment,the performance of the proposed scheme is verified and tested.The results show that the proposed method can meet the operational requirements of power distribution service and effectively improve the network security protection capability of power distribution service based on medium frequency Broadband Powerline Communication.In the face of the emergence of new forms of power trading such as “prosumer” and“partition sell electricity” from the medium frequency Broadband Powerline Communication technology has produced,the paper discusses the using Blockchain technology to replace the current centralized power trading,and proposes a supervisable Blockchain transaction privacy protection model uses a probabilistic public key encryption algorithm to hide the true identity of Blockchain transaction users,uses commitment schemes and zero-knowledge proof technology to achieve privacy protection of transaction amounts,and uses an identity-based encryption system to achieve regulatory authority,the supervision of Blockchain transactions greatly reduces the pressure on storage calculations and key management.The system application analysis and software simulation of business transaction show that the proposed scheme is simple and practical,can ensure the privacy and supervision of business data,and meet the requirements of business operation,and has a wide range of application value in the field of energy trading.