Carrier communication system and method based on impedance dynamic characteristic of power line network
A technology of power line network and carrier communication, which is applied in the direction of distribution line transmission system, etc., can solve the problems that the actual situation of the site cannot be simulated, the success rate of real-time communication on the site cannot be ensured, and cannot be solved well, so as to improve the primary carrier communication The success rate, the optimal communication path, and the effect of increasing the communication speed
Active Publication Date: 2013-07-03
JIANGSU HUAYUAN APP & INSTR
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Problems solved by technology
But the challenges found in multi-carrier are not well resolved here either
[0006] Patent CN102621386A discloses the use of various measurements and analyzes of the impedance characteristics of the power grid, and the evaluation results of the network impedance are used to optimize the networking and routing algorithms of the carrier communication network; However, this kind of static routing network diagram cannot simulate the actual situation on site, nor can it ensure the success rate of real-time communication on site.
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[0027] Such as figure 1 , 2As shown in and 4, the carrier communication system based on the dynamic characteristics of the power line network impedance of the present invention includes a concentrator 1 and a plurality of carrier terminals 2, the concentrator 1 is connected to the carrier terminal 2 through a low-voltage power line, and the low-voltage power line includes a main routing route 13 and / or secondary routing route 14, the carrier terminal 2 includes a sending circuit unit 3 and a receiving circuit unit 4, the sending circuit unit 3 includes a power amplification and impedance adjustment circuit 5, a modulation digital-to-analog conversion and a pre-amplification circuit 6, and the receiving circuit unit 4 includes a pre-amplification circuit 6. Amplifying and filtering circuit 7, demodulation and analog-to-digital conversion circuit 8, carrier terminal 2 also includes DSP and CPU circuit unit 9, isolation coupling and protection unit 10, DSP and CPU circuit unit 9...
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The invention relates to a carrier communication system based on an impedance dynamic characteristic of a power line network. By the carrier communication system, a sending circuit and a receiving circuit are synchronously controlled in a power line carrier communication circuit, so that a sending signal and a receiving signal are transmitted in two directions. When the signals are sent, signal intensity which is actually sent to a power grid is measured and analyzed through a specific circuit, so that network impedance of a sending point is determined in real time; and then output impedance of the sending circuit is dynamically adjusted according to a network impedance matching theory, so as to ensure that the actually sent signal energy is maximum. The invention also relates to a communication method for the system. During carrier communication path selection, a network group network route topological graph is regularly and dynamically optimized, and an optimal communication object and uplink and downlink communication frequencies are adjusted in real time, so that a network standing-wave point and a high-interference region are avoided; and therefore, system communication is always performed through an optimal network path.
Description
technical field [0001] The invention relates to the field of power line carrier communication, in particular to a carrier communication system and method based on the dynamic characteristics of power line network impedance. Background technique [0002] With the rapid development of smart grid in recent years, the requirements for real-time and two-way communication between power companies and end users are getting stronger and stronger. The carrier communication technology based on low-voltage power line has been selected as the main communication method by the power company due to its low design and operation costs. However, the current level of overall power line carrier communication technology is still unable to support real-time, reliable and two-way communication between power companies and end users. This is mainly because the main function of the power grid is to transmit power frequency electric energy, the topology of the low-voltage power line network is extreme...
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Inventor 朱德省尹建丰包海泉
Owner JIANGSU HUAYUAN APP & INSTR