Variable working condition analysis method for gas turbine and combined cycle thereof based on resolving method
A gas turbine and combined cycle technology, applied in the field of variable working conditions analysis, can solve problems such as difficult to obtain ambient temperature characteristics, complex gas turbine parameters and ambient temperature characteristics, frequent changes in gas turbine parameters, etc.
Active Publication Date: 2014-07-16
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology
because IGV Participating in the automatic control of the gas turbine makes the research on the parameters of the various components of the gas turbine and the characteristics of the ambient temperature complicated
[0005] Due to the influence of external load, ambient temperature and other factors, the parameters of gas turbines change frequently, and it is difficult to obtain the ambient temperature characteristics under certain load conditions through the actual field data collected
Method used
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Embodiment Construction
[0172] Below with a certain band IGV A temperature-controlled 270MW gas turbine is taken as an example to describe the specific implementation of the present invention.
[0173] The variable working condition analysis method of the gas turbine and its combined cycle of the present invention comprises the following steps:
[0174] S1 Rational analysis of compressor intake manifold differential pressure data
[0175] The air flow of the compressor is calculated by using the static pressure method of the intake manifold of the compressor, which is estimated according to formula (2-1):
[0176] (2-1)
[0177] In the formula: G c is the air flow rate at the compressor inlet, kg / s; P in is the negative pressure at the intake manifold of the compressor; ? P in is the filter resistance; ρ a is the air density; A is the cross-sectional area where the negative pressure measuring point of the intake manifold is located; Ф is t...
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The invention discloses a variable working condition analysis method for a gas turbine and a combined cycle thereof based on a resolving method. A variable working condition model is established, and the environmental temperature property and the load property of the gas turbine are researched according to the operation result of the model. The steady-state variable working condition property when the gas turbine with inlet guide vane (IGV) temperature control runs with a load at a constant speed is acquired. According to the variable working condition analysis method for the gas turbine and the combined cycle thereof, the variable working condition model can be established, the steady-state variable working condition property when the gas turbine with the IGV temperature control runs with the load at the constant speed is acquired, and the environmental temperature property and the load property of the gas turbine are researched according to the operation result of the model.
Description
technical field [0001] The invention relates to a variable working condition analysis method of a typical gas turbine and its combined cycle based on an analytical method. Background technique [0002] Due to changes in external demand load, ambient temperature and other factors, performance indicators such as gas turbine output, efficiency or heat rate also change accordingly, and the unit is often in a state of variable working conditions. To investigate and compare the load characteristics and compressor fouling characteristics of different gas turbine units, it is necessary to convert the relevant performance indicators of the gas turbine to a certain benchmark condition. [0003] The gas turbine is a constant-capacity power machine, and the ambient temperature has a considerable influence on its power and efficiency. Qualitative analysis, this is because: ① As the ambient temperature rises, the air density decreases, resulting in a decrease in the air mass flow rate su...
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IPC IPC(8): F02C7/00G06F19/00
Inventor 阚伟民肖小清马晓茜谢明超范立莉邓小文
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID