Analysis of security economics for the IT systems is one of the important issues to be solved. The quality of protection (QoP) of IT System can be achieved on different levels. One can choose factors which have a different impact on the overall system security. Traditionally, security engineers configure IT systems with the strongest possible security mechanisms. Unfortunately, the strongest protection (especially in low resource devices) can lead to unreasoned increase of the system load and finally influence system availability. In such a situation the quality of protection models which scales the protection level depending on the specific requirements can be used. One of the most challenging issues for quality of protection models is performing quality of protection evaluation for complex and distributed systems. The manual analysis of such systems is almost impossible to perform. In the article, we proposed the Automated Quality of Protection Analysis framework (AQoPA). The AQoPA performs the automatic evaluation of complex system models which are created in the Quality of Protection Modelling Language (QoP-ML). In the article the case study of complex wireless sensor network analysis is presented. The network is deployed on a roller-coaster.