A control method of steam heating network system combined with distributed power generation

Abstract

The invention provides a steam heating network system regulation method combined with distributed power generation, including a thermal power plant, a steam pipe network system, a distributed power generation system, a micro-grid, a valve system and a coordinated control system. The steam produced by the thermal power plant is transported through the steam pipe network After arriving at the industrial park, part of it is used to supply the real-time steam load of heat users—passive load, and the other part enters the distributed power generation system. The steam turbine drives the generator to generate electricity, which becomes an active load controllable at the system level; When the load is on, increase the valve opening of the steam pipeline entering the steam turbine of the distributed power generation system, use part of the steam in the form of power generation, and regulate the steam flow in the steam heating network. The steam heating network system and control method combined with distributed power generation provided by the present invention can effectively solve the problems of steam condensation and water accumulation in the pipe network caused by the low load of the steam pipeline during the long-distance transportation of steam, and improve the synergy between supply and demand.

Description

technical field [0001] The invention belongs to the field of energy internet, and in particular relates to a steam heating network system combined with distributed power generation and a control method. Background technique [0002] In chemical, pharmaceutical and other industrial parks, steam is an essential energy source in the production process. There are continuous steam users and intermittent steam users in the park. The users have different heat loads day and night and have strict requirements on steam parameters. In order to meet the user's demand for steam of different quality at different times, the pressure and temperature of the steam supply will change accordingly, and some pipelines will stop supplying at night. The pipelines that have been shut down need to complete the process of heating, draining and boosting the next day in advance to ensure normal heating during the day. The heating time is long and the pipelines are corroded. At the same time, the chang...

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Problems solved by technology

The pipes that are out of service need to complete the process of heating pipes, draining water, and boosting pressure in advance the next day to ensure normal heating during the day. The warming time of pipes is long and the pipes are corroded

At the same time, the user's steam consumption is highly random, so that the supplied steam parameters will fluctuate greatly with the change of the user's heat demand. The continuous change of the unit output reduces the operating efficiency and environmental protection of the operation, and easily leads to steam condensation. Cause water hammer, there are operational safety hazards

At the same time, due to the large inertia of the long-distance steam pipeline network, users' needs cannot be responded in time, and there is often a large lag

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