Main circuit structure eliminating right half plane zeros of boost DC-DC (Direct Current - Direct Current) converter and method for determining parameters thereof

Abstract

The invention discloses a main circuit structure eliminating right half plane zeros of a boost DC-DC (Direct Current - Direct Current) converter and a method for determining parameters thereof. The main circuit structure eliminating the right half plane zeros of the boost DC-DC converter comprises a main circuit structure of the boost DC-DC converter comprising a diode capacitor network; and two ends of a middle voltage stabilizing capacitor on the main circuit structure of the boost DC-DC converter are connected in parallel with an RC (Resistor Capacitor) damping circuit respectively. By the adoption of the main circuit structure eliminating the right half plane zeros of the boost DC-DC converter and the method for determining the parameters thereof, the zeros of a right half plane in a boost DC-DC converter system comprising the diode capacitor network are eliminated via a mode that the two ends of the middle voltage stabilizing capacitor are connected in parallel with the RC damping circuit respectively; therefore, a system controlled to the minimum phase of output voltage is obtained; the controller design of the boost DC-DC converter based on the diode capacitor network is effectively simplified; the steady and dynamic performances of the output voltage of the system are improved; and meanwhile, the dynamic response of the output voltage is sped up, and unstable potential hazards which may exist in the system are eliminated.

Description

technical field [0001] The invention belongs to the field of new energy, and in particular relates to a main circuit structure and a parameter determination method for eliminating the right half-plane zero point of a high-boost DC-DC converter. Background technique [0002] For the needs of environmental and economic sustainable development, green new energy sources such as solar energy and fuel cells have broad application prospects. For example, distributed power generation systems composed of photovoltaic panels, electric vehicle drive systems powered by fuel cells, and distributed power systems such as UPS have achieved rapid development. However, in new energy applications, solar energy, fuel cells, etc. have obvious characteristics that the DC power supply voltage is low, and the voltage varies in a wide range and drops significantly. The above applications put forward new and more stringent requirements for existing power electronic converters: wide-range voltage reg...

AI Technical Summary

Problems solved by technology

However, due to the different structure of the main circuit, these methods are not suitable for direct use in diode-assisted step-up DC-DC converters.

For the solution to the right half-plane zero point of the high-boost DC-DC converter control to output transfer function containing a diode capacitor network, the existing relevant literature has not yet involved

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