Electric energy storage coupling frequency modulation control system and method for thermal power generating unit

Abstract

The invention discloses an electric energy storage coupling frequency modulation control system and method for a thermal power generating unit. An energy storage charging and discharging controller is used as a core controller responding to the frequency modulation requirement of a power grid, and a boiler main controller generates a fuel quantity control instruction according to network modulation instruction input, controls the fuel quantity conveyed by a coal feeder and adjusts the energy input of a coal-fired power generation system; the energy storage charging and discharging controller calculates the charging and discharging demand required by electric energy storage according to the power deviation between the network dispatching instruction input and the generator output, controls the energy storage charging and discharging control switch, and adjusts and compensates the output of the generator; the energy storage charging and discharging controller further outputs a fuel quantity correction instruction according to needs; the water supply controller controls the water supply pump according to the temperature of steam output by the boiler and adjusts the flow of cold water entering the boiler; and the steam turbine main controller automatically opens and closes the high-pressure regulating valve according to the main steam pressure signal level output by the boiler, the main steam pressure output by the boiler is kept to be the same as the given pressure, and balance between the working steam amount and the boiler evaporation amount is dynamically kept.

Description

technical field [0001] The invention relates to the technical field of automatic control of thermal power plants, in particular to a thermal power unit electric energy storage coupled frequency modulation control system and method. Background technique [0002] In the context of the transformation of the global energy structure, the stock thermal power unit, with its stable and fast adjustable power supply type, has become the stable "ballast stone" of the power grid with a relatively high proportion of clean energy such as wind and light. play an important role in stability. When thermal power units participate in power grid peak regulation and frequency regulation, it inevitably restricts the improvement of operating economy and equipment safety and stability to a certain extent. How to safely and stably utilize the rapid frequency regulation and deep peak regulation capabilities of thermal power generation units has become a current and future issue. Important technology...

AI Technical Summary

Problems solved by technology

The generator power of the unit and the charge and discharge of the electric energy storage are accumulated to respond to the network regulation command requirements of the power grid. Therefore, the electric energy storage is only equivalent to further improving the comprehensive index of the network regulation command frequency regulation on the basis of the original unit frequency regulation capability and process. Its own security and stability do not help

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