Construction method for electromechanical transient simulation model of gas-fired reciprocating power generating set

Abstract

The invention discloses a construction method for an electromechanical transient simulation model of a gas-fired reciprocating power generating set. The power generating set comprises a reciprocatinginternal combustion engine (a prime mover) and a synchronous linear alternating-current generator, wherein the reciprocating internal combustion engine is composed of a gas-fired engine and a reciprocating compressor. The construction method comprises the steps that firstly, the stator resistance, the rated voltage, the rated capacity and other associated original parameters of the gas-fired reciprocating power generating set are obtained to be used for the subsequent modeling calculation; secondly, model assumption is conducted, and the referential positive directions of all the physical parameters are selected; thirdly, flux-linkage equations of a three-phase stator winding and an exciting winding of the gas-fired reciprocating power generating set, the voltage balance equation of the three-phase stator winding and the motion equation of a rotor are derived so as to form the electromechanical transient simulation model of the gas-fired reciprocating power generating set. By means ofthe construction method, the gaps in an existing research on a mathematic transient simulation model of the gas-fired reciprocating power generating set are filled in, and a better research on a control system of the gas-fired reciprocating power generating set and the running characteristics is facilitated.

Description

technical field [0001] The invention relates to the field of transient stability analysis of power systems, in particular to a method for constructing an electromechanical transient simulation model of a gas-fired reciprocating linear generator. Background technique [0002] In recent years, the energy problem has become more and more serious, the demand for oil and natural gas is increasing, and the offshore oil and gas reserves are abundant, and the construction of offshore oil and gas platforms has become an important means to solve the current energy crisis. At present, my country's marine economy is developing rapidly, and the offshore platform power system provides power for offshore oil and gas platforms, ensuring its safe and reliable operation is becoming more and more important. At the same time, due to the low content of associated gas in offshore oil fields, in order to recycle associated gas, more and more offshore platform power systems have begun to operate ga...

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Problems solved by technology

And the gas reciprocating generator set studied by the present invention, its control system is a reciprocating internal combustion engine composed of a gas engine and a reciprocating compressor, so its mathematical model is similar to that of a free-piston Stirling power generation system and a permanent magnet linear synchronous motor However, domestic and foreign researches on gas-fired reciprocating generator sets are all focused on its application value, and there are few research reports on its electromechanical transient simulation model.

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