Hydropower Simulation Platform Based On SimuLog Language And Implementation

With the development of technologies, the subject of System Simulation has become relatively mature in the21st century. Simulation technologies, due to their effectiveness, reproducibility, economical efficiency and security, are of increasing significance. They have been successfully applied to various areas in China and abroad, e.g., the transformer substation, the power grid, the thermal power, nuclear power, chemical industry, and aerospace engineering. After the steady development, simulation technologies in China have reached internationally advanced levels in some areas.Nevertheless, simulation technologies are still weak in the hydropower industry in China, lacking of mature and universal products. Meanwhile, with the intensive hydropower construction in the last decade, the number of employees in this industry has increased and continuely increases dramatically. The training on the new employees becomes greatly overloaded. Furthermore, the launch of large amount of large-scale and oversize units leads to a prominent increase in the proportion of such units in the power network, resulting in stricter security requirements and more complexities. Therefore, it is of crucial significance to study universal simulation platforms for training hydropower personnels.This thesis studies commonly used methods for simulation and modeling, and proposes a modularized modeling method based on decomposition of large and complex systems. In the digital simulation for continuous systems, the major numerical computations derive from solving first-order differential equations (or state equations). We analyze several numerical methods for integration in modeling solving, and choose the discrete similar method, characterized by its practicality and universality, for numerically solving the model of transfer and state equations. This results in a discrete similar model of typical links. Combining the idea of modularized modeling, we propose and apply the structure-diagram-oriented modeling, which is applicable to both linear and non-linear systems.For the computer simulation system, we need to simulate the whole production process of hydropower stations and construct a "digital hydropower station" corresponding to the real one. This thesis builds a system of the modeling framework by classifying equipment in hydropower stations and focusing on the modeling principles of hydro-generators. The basis equations for generators are established by using the Park equation, and several practical problems in the application of basic equations are further discussed. In addition, we also briefly describe several models including those for speed governors, excitation systems, diversion systems, and turbines.As a computer simulation system for hydropower stations, we describe the above algorithms and mathematical equations in a recognizable way for computers, and implement them in software. Traditional models for simulation packages being inapplicable, the simulation language enables the modelers to focus on the simulated objects of interests. This thesis applies the user-defined model description language "SimuLog" for the first time in China. After stating of the significance of SimuLog, we describe the grammatical rules, compilers, and resolvers for this language based on existing work, and propose an optimized designing scheme for SimuLog. In particular, we perform the analytic operation for the established model of hydro-generators.In this thesis we systematically apply, for the first time, the platform supportive technology whose design and operation is integrated with the monitoring system, and complete the designing for the overall infrastructure, functions, and database structure of the software. Furthermore, we also discuss the storage and condition reconstruction of mass data, the database middleware, and dynamic classification of the trainees. We implement the OTS2000software platform, and provide a detailed description for an advanced system for intelligent evaluation and scoring.At the end of the thesis, we apply OTS2000to the simulation project for Pubugou hydropower station. Despite of the lack of experience of domestic projects in large-scale digital hydropower simulation, we briefly describe several specific problems arising in the implementation of this simulation project, including technical materials collection, jointly developed contents, process description templates, and uniform naming rules. These aspects, verified in our OTS2000implementation, may serve as references for the implementation of other simulation projects.