Communication capacity test device of intelligent carrier electrical energy meters and test method thereof

Abstract

The invention discloses a communication capacity test device of intelligent carrier electrical energy meters and a test method thereof. The communication capacity test device comprises a computer, a test table body and a concentrator mounted on the test table body; four attenuators and five standard carrier electrical energy meters are mounted on the test table body; the current output end of a test power source is connected in series with the current end of the electrical energy meters through relays, and the voltage output end of the test power source supplies voltage to the electrical energy meters through a multipath isolation voltage mutual inductor which is provided with a bypass relay; and the attenuator and the relay are connected between the voltage ends of each two adjacent electrical energy meters. The attenuation of each attenuator to signals is equal to the attenuation of transmitting a carrier in an actual route for 500 m. The test method comprises a carrier attenuation test, a relay transmission test and a combined carrier attenuation and relay transmission test. With the adoption of the test device and the test method provided by the invention, a test system in a lab is completed aiming to the outstanding problems occurring in situ, so that a test result is accurate and reliable, and an entire structure is simpler.

Description

technical field [0001] The invention relates to an electric power test method and device, in particular to a single-phase and three-phase intelligent carrier wave electric energy meter communication capability laboratory test device and method thereof. Background technique [0002] Low-voltage power line carrier communication has become the main communication method for the State Grid Corporation of China to build an electricity information collection system. This technology does not need to modify the existing power grid. It only needs to install a special carrier communication chip on the concentrator and each electric energy meter. The ready-made power line carries on the carrier communication to complete the meter reading work. The carrier communication chip is directly installed in the existing carrier energy meter, but the carrier communication function of the carrier energy meter needs to be tested and verified before use. This test and verification may be carried out...

AI Technical Summary

Problems solved by technology

Otherwise, when the carrier communication cannot be carried out normally, it is impossible to judge the problem, because it may be a failure of the energy meter or a problem of the line, especially a failure of the meter end, which often leads to failure to obtain useful power consumption information.

The problem at the meter end may exist before leaving the factory, or it may be caused during use, and it is often difficult to distinguish

[0003] The single-phase isolation PT of the traditional single-phase carrier test device has a great influence on the carrier, and the test results are not accurate. Based on the above problems, there is an urgent need for a carrier communication function test method and instrument, which is used for the smart carrier energy meter before leaving the factory. lab testing

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