How to build a voltage compensation loop for Buck PCM

I recently learned peak current method to control buck converter. After learning the theoretical knowledge, I set up a simulation model based on Simulink. The parameters are as follows:

Vin=24V Vo=12V

fs=50Khz Pn=24w

The output voltage is stabilized at 12V and the output current is 2A through PI compensation ring. Among them, the instruction current is the superposition of the slope compensation function and the error compensation network. At rated load, the inductor current tracks the command current in the transient process, reaching 9A. The current ring doesn't work. Please help me to see where I made a mistake.

Thank you very much!!

Figure 1 Buck Converter

Figure 2 peak control loop

Figure 3 blue line-Vo yellow line-Io