The invention relates to a bidirectional isolation type energy conversion system. The system comprises a three-phase PWM rectification circuit and a cascaded bidirectional active bridge DC/DC conversion circuit. The bidirectional active bridge DC/DC conversion circuit comprises a high-voltage side H bridge, an HSLP high-frequency transformer circuit and a low-voltage side H bridge. One side of thehigh-voltage side H bridge is connected with the three-phase PWM rectifying circuit, and the other side of the high-voltage side H bridge is connected with the high-voltage side of the HSLP high-frequency transformer circuit; and the low-voltage side of the HSLP high-frequency transformer circuit is connected with the low-voltage side H bridge. The system can achieve AC-DC bidirectional conversion, is simple in design, and achieves the lightweight design of equipment. Meanwhile, the invention further provides a corresponding control method. A SVPWM and PWM hybrid control mode is adopted, a three-phase PWM rectification circuit adopts SVPWM control, and a bidirectional active bridge DC/DC conversion circuit adopts PWM control, so that the control stability of the system is improved, and the control reliability of the system can be kept in a voltage full-range conversion mode in the hybrid control mode.
本发明涉及一种双向隔离型能量变换系统,该系统包括三相PWM整流电路与级联的双向有源桥DC/DC变换电路;所述双向有源桥DC/DC变换电路包括高压侧H桥、HSLP高频变压器电路、低压侧H桥;所述高压侧H桥一侧接所述三相PWM整流电路,另一侧接所述HSLP高频变压器电路高压侧;所述HSLP高频变压器电路低压侧接所述低压侧H桥。该系统可实现交直流双向转换,且系统设计简单,实现了设备的轻量化设计;同时,本发明还提供了相应的控制方法,采用SVPWM与PWM混合控制的方式,三相PWM整流电路采用SVPWM控制,双向有源桥DC/DC变换电路采用PWM控制,提高了系统的控制稳定性,在混合控制方式下能够保证系统在电压全范围内变换保持控制可靠性。
Bidirectional isolation type energy conversion system and control method thereof
双向隔离型能量变换系统及其控制方法
2020-09-11
Patent
Electronic Resource
Chinese
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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