Integrative electric energy quality monitoring terminal

Abstract

The invention discloses an integrative electric energy quality monitoring terminal, comprising a hardware part, a monitoring sensor circuit and a software judging part, wherein the monitoring sensor circuit is used for sending detection signals to an A / D analog-digital conversion module by the design of the hardware part; the A / D analog-digital conversion module is used for sending processed information to a processor; the processor is used for feeding back the information to a display module and receiving a command from a control module; the processor is also provided with a real-time clock module and externally provided with a communication interface, and the information processing standard can be directly set by a switching value input / output module which is directly connected with a central processor.

Description

technical field [0001] The invention discloses a new type of comprehensive power quality monitoring terminal, in particular to an online harmonic monitoring system of a power grid based on a virtual instrument, which belongs to the technical field of power grid monitoring and management. Background technique [0002] Power grid pollution mainly refers to reactive power pollution, high-order harmonics, instantaneous current, surge, high-frequency noise, etc. These components directly cause harm to user equipment. Safety and high quality are the most basic requirements for the operation of the power system. On the basis of ensuring continuous and reliable power supply, the power system must ensure qualified power quality. However, in recent years, with the development of society, with the wide application of power electronic equipment in industry and the extensive use of various advanced instruments and equipment, due to the addition of a large number of nonlinear loads, the ...

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Problems solved by technology

The online detection of power quality in my country generally takes the monitoring instrument of a certain manufacturer as the core, and establishes a small-scale data center. The communication methods are based on MODEM, and some are based on Ethernet, etc., but there are obvious problems: first, The data between the monitoring instruments cannot be exchanged with each other, and data sharing cannot be realized; second, the power quality indicators investigated by different measuring points are different, and the indicators are also increasing. Small-scale data centers are not flexible enough, and data maintenance is difficult; Third, the current data analysis is still in the summary and statistics, and there is no further expert analysis system

[0009] The online monitoring of power quality in my country generally takes the monitoring instrument of a certain manufacturer as the core, and establishes a small-scale data center. The communication methods are based on MODEM, and some are based on Ethernet, etc. There are also obvious problems in this type of method: First, the data between the monitoring instruments cannot be exchanged with each other, and data sharing cannot be realized. Second, the power quality indicators investigated by different measuring points are different, and the indicators are also increasing. Those small-scale data centers are not flexible enough. Data maintenance is difficult. Third, the current data analysis is still in summary and statistics, and there is no further expert analysis system

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