Abstract
The development of wind power and other new energy sources has a great impact on the stability of power system frequency. By analyzing the characteristics of the primary frequency control(PFC) assessment standard of the power grid, one real-time monitoring method of the unit’s PFC capability of the power grid based on data analysis is proposed. The Power network dispatching department can fully grasps the overall frequency regulation capability of the operating units. It can improve the grid’s response methods to deal with high power gaps and ensure the safe and stable operation of the grid.
Highlights
Since the 21st century, with the exhaustion of coal, oil etc. fossil energy and the increasing demand for environmental protection, clean and pollution-free renewable energy has attracted close attention of experts and scholars at home and abroad
The wind turbines cannot provide conventional inertial response for the power system, which will cause the frequency of the power system including wind power to decrease under the same disturbance and has a serious impact on power system frequency regulation
The frequency regulation means of power grid mainly include primary frequency control(PFC), secondary frequency regulation and tertiary frequency regulation
Summary
Since the 21st century, with the exhaustion of coal, oil etc. fossil energy and the increasing demand for environmental protection, clean and pollution-free renewable energy has attracted close attention of experts and scholars at home and abroad. The digital electro-hydraulic control system(DEH) of thermal power units has been widely used, so that the PFC function of the generator set is no longer an inherent adjustment feature of the speed control system, but can be artificially changed and switched on. The PFC will cause frequent fluctuations in the speed regulation system and the thermal system, but power plants pay attention to the stable operation of the generator unit and are unwilling to participate in the primary frequency regulation[6,7,8]. An accurate and real-time evaluation of the primary frequency modulation capability of the generator unit in the power system can effectively increase the quality of the safe and stable operation of the power system
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