Low-pressure gas power generator set high-efficiency transient response device and response control method thereof

Abstract

The invention discloses a low-pressure gas power generator set high-efficiency transient response device. The low-pressure gas power generator set high-efficiency transient response device comprises agas engine and a power generator. The gas engine is provided with an engine intake pipe. The engine intake pipe is connected with an air filter, a low-pressure gas mixer, a supercharger, an intercooler and an electronic throttle valve in series. A low-pressure gas supply device is further connected to the low-pressure gas mixer. A gas supercharging device communicates with a pipeline between theelectronic throttle valve and the engine intake pipe. A gas pressure relief device is connected to the low-pressure gas mixer and the supercharger in parallel. The low-pressure gas power generator sethigh-efficiency transient response device further comprises a parameter detection device and an engine controller ECU. The invention further discloses a specific control method of the low-pressure gas power generator set high-efficiency transient response device. When a power generator set is loaded suddenly, gas is concentrated and quickly fed into a cylinder block of the gas engine to realize quick loading and prevent the gas engine from flaming out. When the power generator set is unloaded suddenly, the supercharging pressure of the power generator set can be relieved quickly, and the supercharger can be protected against surge. The transient responsiveness and operation stability of the set are improved.

Description

technical field [0001] The invention relates to the technical field of generator set operation control, in particular to a high-efficiency transient response device for a low-pressure gas generator set, and also relates to a specific response control method for the transient response device. Background technique [0002] Gas generator sets fueled by natural gas, coal bed methane, biogas and other gas sources have been widely used in various industries, but the gas source pressure used by the above gas generators is relatively low, generally below 30kPa. It is precisely because this type of unit requires low gas pressure and wide adaptability when working, so this kind of low-pressure gas generator set is the most widely used in the market at present. [0003] The gas and air of the low-pressure gas-fired generator set form a mixed gas in the supercharger, and after being supercharged by the supercharger and cooled by the intercooler, it finally enters the cylinder of the eng...

AI Technical Summary

Problems solved by technology

However, because the low-pressure gas-fired generator sets form the mixed gas before supercharging, the mixed gas with changed concentration needs to pass through the supercharger, intercooler, intake pipe and connected pipelines before it can enter the cylinder for combustion during transient response. Due to the long pipeline, the hysteresis of the response is particularly serious. In the case of instantaneous loading, the instantaneous loading capacity of the gas generator set is insufficient, the speed drops too low, and the engine is easy to be crushed and stalled; in the case of instantaneous unloading, The instantaneous unloading time is too long, the speed is too high, and the supercharger is prone to surge

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