A system for improving the flexibility of a thermal power pure condensing unit and its operating method

Abstract

The invention relates to a system for improving thermal power straight condensing unit flexibility and a running method of the system. As for a thermal power straight condensing unit, it is of great importance in excavating the unit peak regulation potential, and no technology of the class exists. The system comprises a boiler, a steam turbine, a condenser, a condensate pump, a deaerator, a feed pump, a main steam pipe, a cold reheat steam pipe and a hot reheat steam pipe. The system is characterized by further comprising a temperature and pressure reduction device A, a temperature and pressure reduction device B, a main steam bypass, a hot reheat steam bypass, a steam pipe branch A and a steam pipe branch B; and the two ends of the main steam bypass are connected to the main steam pipe and the cold reheat steam pipe, the temperature and pressure reduction device A is installed on the main steam bypass, and the temperature and pressure reduction device B is connected with the deaerator through the steam pipe branch A, is connected with the condenser through the steam pipe branch B, and is connected with the hot reheat steam pipe through the hot reheat steam bypass. The system is reasonable in design, and unit load peak regulation of the straight condensing unit can be achieved.

Description

technical field [0001] The invention belongs to the field of improving the flexibility of thermal power plant units, and in particular relates to a system and an operation method for improving the flexibility of thermal power pure condensing units, and is especially suitable for thermal power pure condensing units that need to respond quickly to load changes. 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 ...

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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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