Test and simulation of primary frequency regulation of 600MW sub-critical thermal power units with wide load operation

Abstract

To reveal the performance of primary frequency regulation of the 600MW sub-critical thermal power units in a wide load range and accurately simulate the process, the primary frequency regulation performance of a 600MW sub-critical thermal power unit was studied with a wide load ranging from 20% to 90% under rated conditions. The model of steam turbine in BPA was modified in consideration of steam pressure and the valve throttling effect. The primary frequency regulation performance of the unit was simulated with the modified model. The research results show that the primary frequency regulation performance of the thermal power unit is poor at low load and the results of simulation with the modified model are highly consistent with the tested data due to consideration of steam pressure and valve throttling effect, meaning that the model can be used to simulate the primary frequency regulation of the thermal power unit with wide load operation accurately.

Study on the Adaptability of the Model of the Steam Turbine Speed Governing System under the Working Conditions of Deep Peak Regulation

“…The typical BPA model of a series and single reheat steam turbine speed governing system is composed of three link models such as control system model (GJ card), actuator system model (GA card) and prime motor model (TB card) [2] . The model structure is shown in Fig.…”

Optimization and application of parameter identification error algorithm for steam turbine governing system

“…The parameter identification of the steam turbine speed governing system is to identify the important parameters in the model by using the normalized original data and the model simulation test, so as to provide accurate parameters for the power grid stability analysis. At present, the regulation system model (GJ card), electro-hydraulic servo mechanism model (GA card), and series combination single reheater steam turbine model (TB card) provided in the "PSD-BPA Transient Stability Program User Manual" are usually connected and used as a complete model for the parameter identification of the steam turbine speed control system [6] . The model structure is shown in Figures 1 to 3.…”