System for automatically adjusting combustion of combustion machine, and adjusting method

Abstract

The invention relates to a system for automatically adjusting combustion of a combustion machine, and an adjusting method. A combustion working condition data acquisition device is in communication connection with a control device, the combustion working condition data acquisition device acquires real-time combustion working condition (stability and discharge) data of the combustion machine, and the control device receives the real-time combustion working condition data, generates a combustion working condition limit value and a combustion parameter preset value, and obtains a combustion parameter final set value according to the combustion working condition limit value and the combustion parameter preset value, so that the actual combustion parameter of the combustion machine is controlled according to the combustion parameter final set value and through a combustion medium input device, and the combustion working condition is improved. According to the system for automatically adjusting combustion of the combustion machine, and the adjusting method, the combustion parameter of the combustion machine can be adjusted automatically and optimally, and stable combustion of fuel and up-to-standard discharge are realized.

Description

technical field [0001] The invention relates to a gas turbine combustion automatic adjustment system and an adjustment method, belonging to the technical field of gas turbine power generation. Background technique [0002] Combustion stability is the foundation of safe operation of combined cycle gas turbines (referred to as "gas turbines"), and there are many boundary conditions that affect combustion, such as natural gas calorific value, ambient temperature, air humidity, combustion temperature, on-duty natural gas flow, premixed natural gas Natural gas to air ratio and other parameters. [0003] The combustion chamber is one of the three core components of a gas turbine, located between the compressor and the gas turbine. The fuel supplied to the gas turbine is fully mixed and burned with high-pressure air in the combustion chamber, and the chemical energy of the fuel is efficiently and reliably converted into the thermal energy of the gas, and high-temperature gas that ...

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Problems solved by technology

[0004] The units represented by Siemens gas turbines may experience combustion instability in certain load segments under certain specific working conditions, high combustion roar amplitude, and even combustion acceleration protection actions, resulting in load shedding or even tripping

In order to solve the problem of combustion instability, the same type of power plant generally asks the original manufacturer to make combustion adjustments. However, after the boundary conditions are changed, the combustion instability phenomenon will reappear; Emissions are the premise, so the NOx (nitrogen oxides) emissions of the unit often exceed the standard

[0005] In fact, the gas turbine combustion control logic in the prior art is essentially an open-loop control, which determines that its gas turbine combustion adaptability is not strong, which is also the main reason for the above problems

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