Cascaded Neutral Point Clamped (CNPC) is widely used in microgrid power supply. With the improvement of the “double high” characteristics of high-proportion power electronic equipment and high-proportion renewable energy, the random intermittency of micro-grid power generation mode is enhanced, the power variation range is significantly expanded, and the neutral voltage fluctuation of Line-Commutated Converter (LCC)-CNPC is more obvious, which limit the output safety performance of the system. In this paper, the LCL filter is introduced into the output point of CNPC, the neutral point of the filter is connected with the neutral line of CNPC. The LCC-CNPC system is simplified into the form of Input series output parallel (ISOP) which is controlled by the voltage and current double loop control mode. In addition, the LCL filter is aimed at the problem, which is easy to cause the resonant risk of the system, that the control bandwidth of different micro gird devices. The CNPC combined with LCL inhibits the high-frequency resonance of the system significantly. A MW wind-solar power microgrid is simulated to verify the performance of LCC-CNPC network. The LCC-CNPC simulation model is designed to analyze the operating characteristics. The results show that the proposed LCC-CNPC transient model is accurate and reliable with device breakdown, and can provide stable support for “double-high” microgrid.