应用于储能变流器的LLC/CLLC谐振变换器综述

针对储能变流器中高效隔离型DC-DC变换器的应用需求，首先分析了储能变流器高电压输入、宽电压输出及大功率的特点，着重比较分析了LLC/CLLC变换器实现宽电压调节范围、高压大电流输出的方法，并介绍了其软启动控制技术，然后对比LLC变换器分析了CLLC变换器的特点，探讨其应用于高压大电流变流器所面临的问题，最后介绍了两种拓扑在储能中的应用。谐振变换器是实现储能变流器DC-DC环节高效能量传输的有效途径，大功率LLC谐振技术相对CLLC更加成熟。随着大功率谐振技术的发展，LLC/CLLC谐振变换器将在高压、大功率储能系统中具有非常广阔的应用前景。

Review of LLC/CLLC Resonant Converters Applied to Power Conversion System

For requests of high-efficiency isolated DC-DC converters in power conversion systems, the characteristics of power conversion systems such as high input voltage, wide output voltage range and high power are firstly analyzed. Methods of achieving wide output voltage range and high output current for LLC converters are compared and analyzed emphatically, and soft start control technologies are introduced. Then characteristics of CLLC converter are analyzed compared with LLC converter, and the problems faced by its application in high-voltage large-current converter are discussed. Finally, the application of these two topologies in energy storage is introduced. Resonant converter is an effective way to realize efficient energy transmission in the DC-DC link of power conversion system, high-power LLC resonance technology is more mature than CLLC. With the development of high-power resonant technology, LLC/CLLC resonant converter will be widely used in high-voltage and high-power power conversion systems.