Thermal power system, particularly with large capacity and high operating parameters, are more and more complicated nowadays. In order to implement a feasible design process of a thermal power system, all encountered problems during the whole life cycle should be considered, especially in the service phase. However, the thermal power system is highly complex, which includes machinery, electronics, electrical, hydraulic, thermal, control, and process-oriented subsystem. the traditional development method based on documents has the problems of difficult to reusing the design elements, weak traceability of requirements, and lack of top-level logic verification.  Moreover, there is a large gap because different models, tools and terminology are used during design process. The gap results in inefficiencies and quality issues that can be very expensive.

In this paper, a model-based systems engineering (MBSE) approach is introduced for the top-down design flow of thermal power systems in order to improve system architectures of complex power system and to realize intelligent technical systems. A unified and standardized modeling system is built based on the MBSE method. The GOPPRR (graph, object, point, attribute, role, relationship) meta-model is used to build a domain-specific modeling language meta-model library for the thermal power system design. The Architecture Analysis and Design Integrated Approach (Arcadia) framework is adopted to capture design architecture of the complex thermal power system. During the power system design process, a standardized modeling method including requirements analysis-function analysis-logic analysis-architecture design, is used to develop the power system. The requirements and function can be decomposed and allocated into the subsystems and components by the meta-model-based architecture-driven algorithm. Therefore, this standardized modeling process can establish a traceable relationship between the models at each design stage to verify the availability of initial requirements. The design elements of previous work can be reused in a new design process.

In this paper, the proposed MBSE method is applied to establish a gas turbine performance simulation model. The performance of the target power system is analyzed and compared from different aspect. The results show that the performance simulation model of the power system established by the MBSE method in this paper can describe the requirements, functions, organizational logic, and architecture. Based on the MBSE method, the requirements of the system are refined, traced and verified. The MBSE method can perfect the requirement definition, complete the mapping of the requirements to the system elements, realize the function logic verification, and support requirements verification at all stages, which provides an effective practical approach for the development of power system simulation model.

 


Study on Model-Based Systems Engineering Method for Modeling of Thermal Power System

Division / Sponsors: 
Aerospace, Bioengineering, Applied Mechanics, Design Engineering Division, Advanced Energy Systems, Manufacturing Engineering Division, Noise Control and Acoustics, Nondestructive Evaluation, Diagnosis, and Prognosis (NDPD), Nuclear Engineering Division, Process Industries Division, Fluids Engineering, Heat Transfer, Materials, Microelectromechanical Systems, Safety Engineering and Risk Analysis, Computers & Information in Engineering


Paper Proceedings: https://asmedigitalcollection.asme.org/IMECE/IMECE2020/volume/84478

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