Abstract: Reference to the architecture of the sequential switching shunt regulator（S3R）,the solar array shunt which is used in the field of new energy was researched in this paper.Theoretically,this technology can be extended to the application of any power level,and even if some units of solar array are affected by light or damaged,the output quality of power converter will not be deteriorated.The maximum current control method by which the MOSFET can work in the linear region was proposed,and the control of inductor damping and current feedback was also introduced.It is an effective way to solve the safe issue which is affected by the parasitic parameters of solar cells.In addition,the output voltage ripple of this power converter is nothing to do with the load.Impedance characteristics of the power converter were analyzed on the view of modeling of main error amplifier（MEA）,and then the calculation method of the main topological parameters and control parameters was determined.The voltage range between each shunt regulator（SR） and the gain of MEA module are designed based on the considerations of bus ripple,and the highest switching frequency and efficiency of single SR.Meanwhile,the nonlinear control link was introduced in MEA to improve the dynamic response of the load switching and the anti-jamming capability.The experimental result of 6 kW output power indicates that the bus voltage ripple is kept within 500 mV by using this solar array shunt,and the IF output impedance of is below 20 m.The result shows that a good platform for high-reliability new energy applications has been provided.