Method and system for enhancing stability of high-power energy storage bidirectional DC-DC converter

The invention discloses a method for enhancing the stability of a high-power energy storage bidirectional DC-DC converter, which comprises the following steps of: adding a Sinc filter function on a high-voltage DC bus side to filter higher harmonics, enhancing the damping property of a system by using a virtual resistance feedback method behind an LC filter circuit of the converter, and adopting a preset pulse width accumulation technology on a PWM (Pulse Width Modulation) output signal. According to the high-power energy storage bidirectional DC-DC converter, the problem of high-voltage DC bus side higher harmonic interference in the high-power energy storage bidirectional DC-DC converter can be well solved, voltage spikes generated when an IGBT switch tube is turned on and turned off can be suppressed, voltage impact and loss of converter components can be reduced, and the system stability is greatly improved. 本发明公开了一种用于增强大功率储能双向DC-DC变换器稳定性的方法，包括：在高压直流母线侧加入Sinc滤波函数进行高次谐波滤除，在变换器LC滤波电路后使用虚拟电阻反馈法，增强系统阻尼性，并对PWM