OpenAPI-Driven Development of ECHONET Lite Web API Servers for Distributed Energy Resource Management

In this study, we focus on the development of ECHONET Lite Web API servers based on OpenAPI, specifically examining methods to contribute to the construction and optimization of Virtual Power Plants (VPP). By leveraging the OpenAPI specification, the development process—from the automatic generation of API servers to the creation of test scenarios—was streamlined, resulting in reduced errors and shortened development cycles. Additionally, through APIs for individual equipment control and Demand Response (DR), it became possible to integrate Distributed Energy Resources (DER) and improve the operational efficiency of the entire system. The outcomes of this research accelerate the deployment of VPP technology and contribute to the stabilization and increased flexibility of energy systems. Consequently, this reinforces platforms that support sustainable energy management and the transition to a carbon-neutral society.