Voltage and power regulator based on the composite energy storage of storage battery and super capacitor

Abstract

The invention discloses a voltage and power regulator based on the composite energy storage of a storage battery and a super capacitor. The regulator comprises an energy storage module, an electricity-electron transformation module and a transformer; the energy storage module comprises a plurality of composite energy storage units and the electricity-electron transformation module comprises a plurality of electricity-electron transformers; all the composite energy storage units are connected at the direct current bus side of the electricity-electron transformers in parallel and the alternating current side of each electricity-electron transformer is connected with the auxiliary-side winding of a voltage transformer correspondingly while the original-side winding thereof is connected into a power network. When in normal operation, the regulator can provide reactive power compensation for the power network to effectively stabilize the active power fluctuation; when failure or switching load transmission operation occurs in the power supply line, the regulator provides short-time power supply for load so as to avoid load power supply interruption and further rapidly traces the voltage magnitude and phase of spare lines, thereby realizing that no impact is made in a spare power circuit.

Description

technical field [0001] The invention relates to a voltage power regulator adopting composite energy storage of a storage battery and a supercapacitor, belonging to the technical field of electric equipment. Background technique [0002] Large industrial users generally have dual power supplies. During normal operation, one circuit supplies power and the other serves as a backup. When the power supply line needs to be overhauled or the power supply line fails, the power supply line is first tripped, and then the standby automatic switching control device automatically switches into the backup line. At this time, there will be a short-term power interruption (usually a few seconds) at the user side. And these few seconds of power interruption will cause huge economic losses for large industrial users. The reason why the backup line is not put into operation when the load is reversed is because there may be a loop potential between the power supply line and the backup line a...

AI Technical Summary

Problems solved by technology

However, the small capacitor connected in parallel on the DC side of the STATCOM has a very small capacity and can only meet the active power consumption of the STATCOM. Therefore, the STATCOM and the grid can only exchange reactive power within two quadrants, and cannot exchange active power with the grid.

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