在利用热工水力台架进行反应堆热工水力研究时 ,一般采用电加热代替核释热。由于反应堆本身存在温度效应、空泡效应等内部反馈 ,因此用电加热代替核释热时 ,还应能模拟这种内部反馈。本文分析了各种内部反馈的不同影响 ,提出了模拟的重点 ,并在此基础上提出了一个模拟内部反馈的方法 In the use of thermal hydraulic stand for thermal hydraulic research, the general use of electric heating instead of nuclear heat release. As the reactor itself, there are temperature effects, cavitation and other internal feedback, so electric heating instead of nuclear heat release, but also be able to simulate this internal feedback. This paper analyzes the different effects of various internal feedbacks, puts forward the key points of simulation, and on this basis proposes a method to simulate internal feedback