Turbine-related Network Characteristics Based On Generation-network’s Optimized Coordination

Large-scale wind power and other clean energy sources connect to the grid with the characteristics of intermittent, random and low schedulability.The fast construction of special high-voltage strong intelligence network promotes the rapid expansion of the scale grid interconnection. The new changes make the power gridoperating more complicated. Thecoordination between the generators and the grid ismore and more important with higher request for the performance of thermal power units. Research on the turbine-related network characteristics can conduce to the upgrade of security and stability of power systems, which is important to construct strong and smart grid.This thesis focuses on the research of turbine-related network characteristics considering the coordination of generators and grids. The main research results are:Detailed mathematical models of turbine-related network characteristics were established and suitable for conditions in simulation involving the valve nonlinear, heat regenerator, main steam pressure, OPC(Over Speed Protect Controller), PLU(Power Load Unbalance),etc. The adaptability of the models were improved greatly.The models were verified by using test data and PMU (Power Management Unit) data.The turbine and governor model parameter correction method was provided. Results showed that the models match the actual data well. The co-simulation of turbine and power grid model was implemented by RTDS(Real Time Data System), and it was proved that the detailed models of turbine-related network characteristics could improve the power grid simulation accuracy.The parameters uncertainty of effect on the unit power was studied by time-domain analysis, and the key parameters affecting the static and dynamic characteristics of the unit were obtained. The influence parameters on different oscillation frequencies of power system was studied by the frequency domain analysis.The model was verified by time-domain analysis. The results can be used in selection of models and parameters in types of power system simulations.The unit primary frequency characteristics was analyzed using PMU data, the primary frequency performance indexes and calculation methods considering AGC (Automatic Generation Control) real response were determined.The hierarchical and weighted primary frequency comprehensive assessment method was provided, which can urge the power plant to improve the units primary frequency performance and increase operational quality and stability of the grid.The regional power grid primary frequency regulation capability assessment method under accident were proposed. The important influence of coordinated development of the primary frequency regulation within the regions, which provide technical support to power system dispatching departmentfor dynamically adjusting unit operating conditions.