Natural gas pipeline network pressure energy self-control power generation system and self-control method

Abstract

The invention provides a natural gas pipeline network pressure energy self-control power generation system which comprises a power generation system, a self-control system and a power output system, wherein the power generation system, the self-control system and the power output system are located on a branch pipeline of a natural gas pipeline network. The power generation system comprises expansion equipment, a power generator and a temperature and pressure balancing device, wherein the expansion equipment, the power generator and the temperature and pressure balancing device are located on the branch pipeline. A power output shaft of the expansion equipment drives the power generator to generate power, and the power generator is connected with the power output system. The self-control system comprises a first electromagnetic valve, a first pressure meter, a second electromagnetic valve, a second pressure meter and a thermometer. The first electromagnetic valve and the second electromagnetic valve are connected. The self-control system further comprises a PLC. The first electromagnetic valve, the first pressure meter, the second electromagnetic valve, the second pressure meter and the thermometer are all connected with the PLC. According to the natural gas pipeline network pressure energy self-control power generation system, the technology that power storage, inversion, self-control and flow limiting are combined is adopted, and power supply is controlled to be stable, so that the problem that power output is not stable due to large fluctuation of gas is solved; the whole process is high in stability and good in safety and can be continuously operated.

Description

technical field [0001] The invention relates to a power generation device, in particular to an automatic control system and a control method for generating electricity by utilizing kinetic energy in a fluid pipeline (such as a natural gas pipeline network and a liquid pipeline network). Background technique [0002] At present, in the process of fluid pipeline transportation, since the monitoring and control devices are located in remote areas and far away from the power grid, this will cause power shortage or no power supply for monitoring, testing and other equipment, and there are hidden dangers. For example, there are many pressure adjustments during the natural gas transmission process The station is in a state of power shortage or no power supply due to its remote location, resulting in difficulty in power supply. Due to the remote location of these voltage regulating stations / boxes, it often occurs due to the lack of supply of mains power supply cables, and the necessa...

AI Technical Summary

Problems solved by technology

[0002] At present, in the process of fluid pipeline transportation, since the monitoring and control devices are located in remote areas and far away from the power grid, this will cause power shortage or no power supply for monitoring, testing and other equipment, and there are hidden dangers. For example, there are many pressure adjustments during the natural gas transmission process The station is in a state of power shortage or no power supply due to its remote location, resulting in difficulty in power supply. Due to the remote location of these voltage regulating stations / boxes, it often occurs due to the lack of supply of mains power supply cables, and the necessary lighting and heating in winter. At the same time, because there is no external power supply, the monitoring system cannot be installed and used, and the data cannot be remotely monitored. It is necessary to send inspectors to inspect the site every day, and the uncertain safety hazards of pipe network equipment cannot be discovered in time. the manifestation

[0003] Aiming at the current electricity consumption problems of these pressure regulating stations, some technicians have proposed an energy-collecting pipeline fluid (flowing water, wind) power generation device, which fully collects the energy of the fluid (flowing water, wind) through a trumpet-shaped energy-collecting pipeline, and then generates electricity through it. The machine converts fluid energy into electrical energy, but there are safety hazards in the operation of this power generation device, such as easy leakage of pipelines, unstable fluid pressure, etc. It is time-consuming and laborious to detect and maintain only by manpower, and it is slow to find and solve problems.

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