Electric energy quality signal generating system for smart grid as well as comprehensive test method

Abstract

The invention provides an electric energy quality signal generating system for a smart grid as well as a comprehensive test method, belonging to the field of electric energy quality of the smart grid. The system comprises an electric energy quality signal generating module, an electric energy quality monitoring module, a network communication module, a GPS (Global Positioning System) module and a comprehensive test system module, wherein the electric energy quality signal generating module comprises a signal generator and a power amplifying module for generating an appointed electric energy quality signal to excite tested nodes. According to the technical scheme provided by the invention, an instruction signal is generated by utilizing a digital signal processor on the basis of various complicated steady-state and transient power qualities in the latest IEC (International Electrotechnical Commission) standard and the performance of the electric energy quality signal generating module is improved by utilizing a linear power amplifier to output a power signal. The comprehensive electric energy quality test system provided by the invention has the advantages of rich test signal variety, high response speed, and the like, and various needs of smart grid tests for the generation of the electric energy quality signal can be met.

Description

technical field [0001] The invention relates to the field of electric energy quality of a smart grid, and specifically proposes a power quality signal generation system and a comprehensive testing method for the smart grid. Background technique [0002] With the development of the information age, people pay more attention to the digital grid and distributed energy, and are trying to integrate the information revolution and the new energy revolution in the power industry to form a new generation of smart grid. On the one hand, the introduction of various new energy sources into the traditional power grid is becoming larger and larger, making the smart grid have the characteristics of distributed energy. With the introduction of modern power electronics technology and the wide application of high-power power electronic devices, more and more complex load objects at the user end of the power grid will generate high-order harmonics and cause severe distortion of the grid voltag...

AI Technical Summary

Problems solved by technology

[0011]Traditional power quality signal generators cannot meet the requirements of the smart grid, mainly in the following aspects:

[0012]1. Single function, the same device can only generate one type of power quality signal;

[0013]2. Most of them are implemented by switching amplifiers. Based on the current national standards, they are suitable for generating traditional steady-state power quality signals, including voltage deviation, harmonics, and flicker Steady-state indicators of a given type; unable to generate complex and fast-changing transient power quality signals in IEC standards

[0015] In the currently disclosed power quality signal generation technologies, only some power quality interference signals are simulated and generated, which are used to test the load characteristics of a certain node or The anti-disturbance characteristics of the local grid controller of the node; and these devices are not organically combined with the power quality monitoring system, and the distributed power quality comprehensive test of the smart grid cannot be realized

Images