A deep peak-shaving system and its operation method for combined heat and power units

Abstract

The invention relates to a cogeneration unit deep peak regulating system and a running method thereof. No effective thermal power generating unit electric power peak regulating technology exists at present. The cogeneration unit deep peak regulating system comprises a boiler, a turbine, a power generator, a heat exchange station, a heat user, a heat supply extraction steam pipe and a heat supply pipeline. The turbine is connected with the power generator, and the heat exchange station is connected with the heat user through the heat supply pipeline. The cogeneration unit deep peak regulating system further comprises a heat exchange device, a heat storage device, a main steam pipe, a reheat steam pipe and a temperature and pressure reduction device; the boiler is connected with the main steam pipe, and the main steam pipe is divided into two branches connected with the turbine and the temperature and pressure reduction device correspondingly; the turbine is connected with the reheat steam pipe, and the reheat steam pipe is divided into two branches connected with the boiler and the temperature and pressure reduction device correspondingly; and the temperature and pressure reduction device, the heat exchange device and the heat storage device are sequentially connected through a pipeline. The heat storage device is connected with the heat supply pipeline through a pipeline. The cogeneration unit deep peak regulating system is reasonable in design and reliable in performance, and unit electric power peak regulating and heat load peak clipping and valley filling are facilitated.

Description

technical field [0001] The invention belongs to the technical field of heat storage and peak regulation in thermal power plants for heating, in particular to a deep peak regulation system for cogeneration units and an operating method thereof, and is especially suitable for thermal power plants for heat supply and power grid peak regulation. Background technique [0002] At present, my country's policies are gradually emphasizing the promotion of new energy sources and reducing the proportion of thermal power units. By the end of 2012, my country had installed wind power capacity of 44.8GW. However, wind power has strong randomness, intermittency, uncontrollability and anti-peaking characteristics, which gradually increases the difficulty of thermal power units in power grid peaking. In order to effectively consume new energy resources, the country has gradually increased the policy requirements for peak regulation of thermal power units. The regulations require not only t...

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Problems solved by technology

The publication date is January 19, 2011, and the Chinese patent with the publication number CN101950964A discloses a system and scheduling method including combined heat and power units and pure condensing thermal power units, but it has not really improved the flexibility of the units. function of

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