Novel efficient special-procurement power supply circuit for low-voltage distribution system

Abstract

The invention relates to a novel efficient special-procurement power supply circuit for a low-voltage distribution system, comprising an AC / DC rectifier, a DC / AC inverter and a new energy access unit, wherein the AC / DC rectifier is connected with the DC / AC inverter through a DC_Bus; and the new energy access unit is accessed to the circuit through the DC_Bus. Compared with the prior art, the invention has high power supply reliability, good power supply power quality and functions of meeting multiple users and requirements, can also has the advantages of inhibiting the harmonic pollution of an electric system and compensating equipment resonance of the electric system in parallel, and the like.

Description

technical field [0001] The invention relates to a novel high-efficiency "special-demand" power supply equipment, in particular to a novel high-efficiency special-demand power supply circuit for a low-voltage power distribution system. Background technique [0002] At present, due to the large differences in the power frequency and voltage levels of countries (or continents), and the differences in power supply stability and power quality in various regions, as the Shanghai 2010 World Expo is approaching, according to Different countries exhibiting equipment have different requirements for power supply reliability and power quality (various equipment has different tolerance limits for power supply reliability and power quality), which makes the power supply problem of pavilions in various countries or regions a prominent problem. [0003] At the same time, due to the use of a large number of nonlinear loads and impact loads (such as frequency conversion speed control equipmen...

AI Technical Summary

Problems solved by technology

[0003] At the same time, due to the use of a large number of nonlinear loads and impact loads (such as frequency conversion speed control equipment and electric arc furnaces, etc.), there are a large number of harmonics and reactive power requirements in the AC input power supply current, which will seriously endanger low-voltage power distribution. The safe operation and economical operation of the system will increase the line loss of the power distribution system, which will affect the realization of the "energy saving and consumption reduction" index of our low-voltage power distribution network

[0004] In addition, due to the use of a large number of non-linear loads (computers, dimming lights, etc.) in a large number of key load centers (such as banks, hospitals, etc.), the power quality of distribution lines is seriously degraded. At the same time, some of the main electrical equipment of these loads ( Data centers, measuring equipment) have extremely strict requirements on power quality. Therefore, while considering how to avoid the impact of harmonic current on the power grid, we should also consider how the power quality of the power grid will affect the operation of precision equipment.

Images