Feed water flow linear regulating valve group and system for nuclear reactor thermal hydraulic experiment

The invention discloses a feed water flow linear regulating valve group and system for a nuclear reactor thermal hydraulic experiment. Relates to the technical field of automatic control. The regulating valve group comprises a pressure regulating valve for regulating the pressure of the secondary loop, and the flow regulating valve is linearly regulated according to a regulating instruction under the condition that the local pressure drop of the secondary loop reaches the standard (namely, the pressure difference between the two ends of the flow regulating valve is always kept constant); the control cabinet is used for realizing the standard reaching of the local pressure drop of the secondary circuit of the reactor thermal hydraulic test; through cooperation of a pressure regulating valve and a control cabinet in the feed water flow linear regulating valve group, under the condition that the pressure difference between the two ends of the flow regulating valve is always kept constant, the flow regulating val