High-low pressure bypass system meeting peak regulation requirement and dynamic optimization control method

Abstract

The invention discloses a dynamic optimization control method of a high-low pressure bypass system meeting the peak regulation requirement. The purpose of reducing the power output of a steam turbine generator unit to meet the deep peak regulation requirement of a power grid is achieved through the partial bypass of boiler live steam which should enter a high-pressure cylinder and an intermediate-pressure cylinder to do work. By rapidly regulating the opening degree of high-pressure and low-pressure bypass steam pipeline regulating valves, rapid load increasing and decreasing of the coal power unit are achieved, and the frequency regulation requirement of the power grid is met. Based on the provided peak regulation system, the high-low pressure bypass control method for maximizing the profit values of comprehensive power generation income, auxiliary peak regulation policy income, coal consumption cost and the like is provided. The system is simple, small in transformation range, high in peak regulation capacity, suitable for the peak regulation and frequency regulation requirements of a combined heat and power generation unit in the non-heat-supply period, and also suitable for a straight condensing unit. The deep peak regulation technical means for the coal power unit in the straight condensing or non-heat-supply period is widened, the power output regulation range is wide, and the operation mode is flexible.

Description

technical field [0001] The invention belongs to the technical field of peak regulation systems for coal-fired power units, and relates to a high and low voltage bypass system and a dynamic optimization control method that meet peak regulation requirements. Background technique [0002] At present, the energy structure has problems such as severe energy security situation, high pressure on carbon emission reduction, unreasonable energy consumption structure, prominent ecological and environmental problems, and low energy utilization efficiency. Cleanliness is one of the important directions of energy transformation. We must vigorously develop offshore wind power, safely and efficiently develop nuclear power, actively develop large-scale hydropower in river basins, and promote clean, efficient and flexible coal power generation. Promote the construction of multi-energy complementary large-scale clean energy bases in the northern part of the west, and actively develop distribut...

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Problems solved by technology

[0005] Existing coal-fired flexible peak-shaving transformation technologies are mostly applicable to cogeneration units, pure condensing units or cogeneration units during non-heating period operation, only boiler low-load safe and stable combustion transformation technology is suitable for deep peak regulation, available technologies Single, peak shaving depth still does not meet the grid dispatching requirements

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