With the continuous development of distributed energy technology and the in-depth reform of the power system

the distribution network will show the characteristics of multi -stake- holders. In order to characterize the interest needs and technical characteristics of different stakeholders

while realizing the multi- venergy coupling of cooling

heating

and electricity in the distribution network

as well as the balance of power and electricity

and maintaining the safe and stable operation of the power system

the analysis target cascading theory is adopted to study the problem of collaborative optimization scheduling of network operators

distributed energy suppliers

combined cooling heating and power type load integrators under the market environment. Modeling the technical operating characteristics of the multi-energy elements within each subject

as well as the interrelationship between the subjects and the existence of different interest appeals

each subject performs collaborative optimization by exchanging contact variable information and finally converges. Lastly

the model and algorithm are verified based on the example of IEEE33 distribution network system.