A method for controlling the speed of a biomass gas internal combustion generator set

Abstract

The invention discloses a biomass gas internal combustion generator set rotation speed control method. The method includes the steps that the rotation speed output by an internal combustion engine is monitored in real time, and when the output rotation speed changes and is compared with a preset rotation speed value, a deviation value is generated; the deviation value and the change rate of the deviation value serve as two input quantities of a fuzzy control step, after an output quantity is clarified, output of the fuzzy control step is obtained, and the deviation value and a fine tuning quantity of a PID parameter are input to a PID controller so as to adjust corresponding parameters; a biomass gas internal combustion generator set system is corrected; the open degree of a throttle is controlled, gas inlet amount of biomass gas is adjusted, and finally the speed of adjusting speed is achieved. The method has the advantages of effectively solving the conflict between two dynamic performance indexes including adjusting time ts and overshoot MP in a fuzzy self-adaptation PID control system, changing parameters of the controller in real time and adapting to large fluctuation of biomass combustible gas.

Description

technical field [0001] The invention relates to the technical field of speed regulation of an internal combustion generator set, in particular to a method for controlling the speed of a biomass gas internal combustion generator set. Background technique [0002] With the rapid development of social economy, energy and environmental issues are getting more and more attention. my country is a traditional agricultural country with abundant biomass energy. The use of new energy "biomass gas" for power generation is one of the important means to effectively solve environmental and energy problems. Biomass gas internal combustion generator set is the key equipment to realize high-efficiency conversion of biomass gas to electricity, and its speed control effect directly determines the quality of power output by the unit. [0003] In fact, compared with fuel oil and natural gas, the composition of biomass gas is complex, and the flammable gas fluctuates greatly, which makes the un...

AI Technical Summary

Problems solved by technology

Although the control effect of fuzzy adaptive PID is better than that of traditional PID, fuzzy adaptive PID also has some shortcomings of traditional PID. For example, in the process of adjusting the proportional coefficient of PID, the adjustment time t s and overshoot M P contradiction

If the overshoot is small, the adjustment time will be long; if the adjustment time is short, the overshoot will be large, and even cause system instability.

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