Control system and method for assisting primary frequency modulation of thermal power generating unit by electrode type electric boiler

Abstract

The invention discloses a control system and method for assisting primary frequency modulation of a thermal power generating unit by an electrode type electric boiler, and belongs to the technical field of thermal power generating unit control, and the control system comprises an electrode type electric boiler frequency modulation power consumption correction logic circuit and an electrode type electric boiler power consumption control logic circuit; the control method comprises an electrode type electric boiler frequency modulation power consumption correction procedure and an electric boiler power consumption control procedure, the load characteristics of the electrode type electric boiler are utilized, primary frequency modulation of the thermal power generating unit is assisted by increasing and decreasing the power consumption of the electrode type electric boiler, and the primary frequency modulation performance of the thermal power generating unit is improved. Therefore, the primary frequency modulation performance of the thermal power generating unit can directly and automatically adjust the steam turbine control valve to complete the primary frequency modulation response without depending on the self-adjusting system of the steam turbine, the service life of thermal power generating unit equipment is prolonged, and the economical efficiency of the thermal power generating unit is enhanced.

Description

technical field [0001] The invention relates to the technical field of thermal power unit control, and more specifically, to a control system and method for primary frequency modulation of an electrode type electric boiler auxiliary thermal power unit. Background technique [0002] In the daily power grid operation, the primary frequency modulation control function of the thermal power unit must meet the requirements for stable control. At present, some parameters of the control system of some thermal power units, such as droop and frequency difference function, are not set correctly, and it is difficult to obtain ideal adjustment effect. In addition, there is no effective coordination with the AGC function of the thermal power unit, resulting in insufficient load response and slow speed, making it difficult to implement continuously, causing the primary frequency regulation control function to fail to meet the requirements, and further causing the primary frequency regulati...

AI Technical Summary

Problems solved by technology

The primary frequency regulation function of a thermal power unit usually adjusts the opening of the steam turbine door and utilizes the heat storage of the boiler to quickly respond to changes in the grid frequency. This frequency modulation method will cause rapid changes in the turbine door and turbine speed when the grid frequency changes frequently. Changes seriously affect the safe operation of thermal power units

Since the National Energy Administration launched a pilot thermal power flexibility transformation project in 2016, electrode-type electric boilers have been widely used to assist thermal power units in grid peak regulation, but the research and application of their auxiliary thermal power units in primary frequency regulation has not yet been carried out, and has not really played a role. The flexibility of electric electrode boilers

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