本发明公开了一种面向中高温热源的具有多回路故障预防机制的LMMHD/ORC耦合发电系统及其工作方法，该系统可以深海核反应堆为热源。通过与深海核反应堆进行耦合，将液态金属冷却剂与低沸点工质与混合器中混合，使得低沸点工质汽化推动液态金属通过磁流体发电通道发电，发电后的混合两相工质在分离器中分离，使用气态低沸点工质推动汽轮机转动进一步发电，巧妙地将两种发电方式结合起来，实现能量的梯级利用，此外，若其中一种发电装置出现故障，还可以通过主动控制利用另一种发电装置继续进行发电，持续稳定的输出电能。本发明可以显著提高深海核动力电源系统的发电输出功率与稳定性，更好地满足深海环境探测的要求。

The invention discloses an LMMHD/ORC coupled power generation system with a multi-loop failure prevention mechanism for a medium and high temperature heat source and a working method thereof. The system can be used as a heat source by a deep-sea nuclear reactor. By coupling with a deep-sea nuclear reactor, the liquid metal coolant and the low-boiling working medium are mixed with the mixer, so that the low-boiling working medium vaporizes and drives the liquid metal to generate electricity through the magnetic fluid power channel. After generating electricity, the mixed two-phase working medium is separated in the separator, and the gas low-boiling working medium is used to drive the turbine to turn and further generate electricity, cleverly combining the two power generation methods. The cascade utilization of energy is realized. In addition, if one power generation device fails, another power generation device can be used to continue generating electricity through active control, and the power output can be sustained and stable. The invention can significantly improve the power output and stability of the deep-sea nuclear power supply system and better meet the requirements of deep-sea environmental exploration.