Detailed Control System Modeling In Electromechanical Transient Simulation Of AC/DC Power Grid

Modern Power System has been gradually shifting to be a large-scaled and high-voltagepower system. It focuses on the importance of the implement of interregional interconnectionand long distance power transmission. The economic boom of recent decades that promptedthe power grid becomes a safer, more stable, more flexible and more efficient system. Itmakes power system produce great changes in the way of its construction managements andoperating managements. At present, the national power grid is aimed to achieve the goal of"West-to-East power transmission" and realizing the networking in whole nation. However,the unbalance distribution of primary energy problem determines that national power grid willmove toward increase its capacity and extend its transmission distance.In order to improve the simulation ability of real power system, SEPRI has introducedelectric-mechanical transient simulations codes from eMIT (USA) company (hereinafter,DSP). The work of this thesis is based on the simulation core from eMIT (USA) introducedby SEPRI, including totally understanding DSP codes, and the main content is to makeextensions and researches on DSP electric-mechanical codes, includes generator controllermodeling of AC system and control system modeling of High-Voltage DC System. How todescribe these models accurately is the key point to developing and accomplishing DSPcodes.The idea and frame of this thesis are as follows:1. Compare generator saturation curve computing methods in different power systemsimulation software, then advance a new generator saturation curve computing method inDSP program and verified it in practical examples;2. Use macro scripting language provided by DSP to model customized models of generatorcontrollers, include exciters, stabilizators and governors; then verified these models inIEEE standard example;3. Use detailed quasi-steady-model model HVDC control systems in DSP program, aftercompared and combined them with HVDC control system models advanced by otherpower companies or research institutes to develop more detailed control characteristics;model for Sanguang and Tianguang HVDC control system and verified them withPSD-BPA&PSCAD/EMTDC results, then analysis comparisons objectively;4. Finally, calculate and simulate all the models made in this thesis in CSG practicalexamples, compare the results with PSD-BPA and analysis them to verify theeffectiveness and correctness of DSP new models.