According to the principle of active invertion, now we take advantage of sources on both sides of the cycloconverter in FFFTS to achieve the reversibility of the power transmission.

• 而柔性分频输电系统将充分利用变频器两端均有电源的优势，根据有源逆变的机理，实现交交变频器功率输送方向的可逆性。