Electric energy quality communication method applied to microgrid

Abstract

The invention discloses an electric energy quality communication method applied to a microgrid. In the method, data transmission is performed based on transmission control protocol (TCP) / internet protocol (IP) by using a network interface as a physical interface; two ports are formed on an electric energy quality device and are used for transmitting data with a background monitoring system and defining stipulations to perform hierarchical processing on the data; the two ports comprise a real-time data port and an off-line file port; the real-time data port transmits a message by a passive waiting-for-call mechanism; and the off-line file port transmits a message by an active information-uploading mechanism and the passive waiting-for-call mechanism. By the electric energy quality communication method, various types of data of the electric energy quality can be transmitted and a reasonable data transmission flow is found, so that the problem that the electric energy quality data cannot be transmitted in the conventional stipulation is solved, information which a user wants to see can be displayed quickly, unobstructed network and data transmission without packet loss are guaranteed, and the problem about how to transmit a large number of electric energy quality data is solved.

Description

technical field [0001] The invention relates to a method of power quality communication, more specifically, to a method of power quality communication applied to a microgrid. Background technique [0002] The power system in the world today is a single centralized power supply system characterized by large units, large power grids, and high voltage. However, with the improvement of society's requirements for the safety and reliability of power supply, people find that large power grids cannot fully meet the requirements. this request. The disturbance generated by any fault in the large power grid will have a great impact on the entire power grid. In severe cases, it may cause large-scale power outages and cause serious consequences. The California blackout in 2003 and the blackout caused by the snowstorm in southern my country in early 2008 made people pay attention to the microgrid. As a controllable power source, the microgrid can not only be connected to the low-voltage...

AI Technical Summary

Problems solved by technology

[0005] However, the existing power transmission protocol does not have a unified and reasonable method of transmitting power quality data, as follows: IEC60870-5-101 and IEC60870-5-104 are both substation and dispatching communication, the former adopts serial port mode, The latter adopts the network method; the IEC60870-5-102 protocol is a metering protocol, which mainly transmits electrical measurement information; the IEC60870-5-103 protocol is a relay protection protocol, and most of them communicate with protection devices

There is no special definition of power quality in these regulations, and it is impossible to transmit a large amount of power quality data

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