Flexibility-improved double-cylinder decoupling depth peak load cycling system of heat-engine plant

Abstract

The invention discloses a flexibility-improved double-cylinder decoupling depth peak load cycling system of a heat-engine plant. The system is applied to the depth peak load cycling occasion of a heatsupply unit of the heat-engine plant; through intelligent control over an intelligent temperature and pressure reducer, full mixing of high-pressure steam and medium-pressure steam is realized, and large-area heat supply demand is satisfied; moreover, the quantity of medium-pressure steam is automatically supplemented to achieve a system balance, thereby realizing double-cylinder decoupling, andachieving the goal of primary peak load cycling; electric energy is consumed through intelligent control over an electric heater unit to produce heat energy, thereby achieving the goal of secondary depth peak load cycling; the produced heat energy is stored by a heat storage device, and is used as a standby heat source when needed; and the goal of depth peak load cycling is achieved through combined utilization of primary depth peak load cycling and secondary depth peak load cycling.

Description

technical field [0001] The invention relates to the technical field of thermal power plant heating unit monitoring, in particular to a dual-cylinder decoupling deep peak-shaving system for flexible transformation of a thermal power plant. Background technique [0002] In recent years, with the significant changes in the load structure of the power grid and the rapid growth of the installed capacity of the power grid, the peak-to-valley difference of the load in the daily operation of the power grid is increasing, and the capacity of the power grid to accommodate wind curtailment is insufficient. The combined heat and power unit operates in the mode of "heating and power generation", and the peak regulation capacity is limited. The difficulty of peak regulation has become the most prominent problem in power grid operation. If the contradiction between power grid peak regulation and thermal power unit heating is not properly handled, it may affect the safety of residents' hea...

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Problems solved by technology

[0003] At present, the internal peak shaving of the power plant is mainly realized by unit load reduction peak shaving and electric thermal storage boiler assisted peak shaving technology. Although this type of technology can achieve the purpose of peak shaving, it is limited by the large area heating load and the technology itself. Due to the disadvantages of large equipment footprint, high construction and maintenance costs, and serious energy waste, the optimal deep peak-shaving effect cannot be achieved

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