Current-limiting and controlling method of active damping of current-limiting and storage circuit

Abstract

The invention discloses a current-limiting and controlling method of active damping of a current-limiting and tank circuit. The output of a first half bridge (HB1) of a first current source inverter (CSC1) has the same phase with a first filter capacitor (C1) and the current with the amplitude of 1 / R; the output of a second half bridge (HB2) of the first current source inverter (CSC1) has the same phase with a second filter capacitor (C2) and the current with the amplitude of 1 / R; the output of a third half bridge (HB3) of the first current source inverter (CSC1) has the same phase with a third filter capacitor (C3) and the current with the amplitude of 1 / R; or the output of the first current source inverter (CSC1) has the same phase with the first filter capacitor (C1) and the current with the amplitude of 1 / R; the output of a second current source inverter (CSC2) has the same phase with the second filter capacitor (C2) and the current with the amplitude of 1 / R; and the output of a third current source inverter (CSC3) has the same phase with the third filter capacitor (C3) and the current with the amplitude of 1 / R. In the invention, open-loop control is needed only and the response speed is nearly instantaneous.

Description

Technical field [0001] The invention relates to a control method of a current-limiting energy storage circuit. Background technique [0002] With the rapid development of the national economy, the society’s demand for electricity continues to increase, which has led to the continuous development of the power system. The continuous increase in the capacity of single machines and power plants, the capacity of substations, and urban and central loads has resulted in the interconnection of power systems. The level of short-circuit current in high-level power grids continues to increase, and short-circuit faults are becoming more and more destructive to the power system and its connected electrical equipment. Moreover, while the demand for electric energy is increasing, people have also put forward higher requirements for power quality, power supply reliability and safety. However, the transient stability problem of large power grids is more prominent. One of the most important reaso...

AI Technical Summary

Problems solved by technology

Although this method does not need the output voltage of the voltage source inverter to control the fault state, it needs to add a bulky and expensive current-limiting inductor. At the same time, due to the influence of the current-limiting reactor, when the grid voltage drops, the voltage source The converter not only needs to compensate the sag voltage of the power grid, but also needs to compensate the voltage of the current-limiting reactor, and the function of voltage compensation is relatively weak.

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