Method, device for realizing energy saving control of generating system, and generating system

Abstract

A method, device and system for speed control of a generator set are provided. The method includes: acquiring a minimum oil consumption curve of the generator set; detecting the current output power of the generator, and looking up the minimum oil consumption curve for the speed of the generator corresponding to the output power; regulating the speed of the generator by the speed corresponding to the output power. The method, device and system can effectively reduce the impact of the generator set on energy-saving effect of the system due to uncertain factors such as product type, aging performance and so on, which enable the generator set to operate at the proper fuel-saving speed and maximize the fuel-saving effect.

Description

Technical field [0001] The present invention relates to the field of control technology, and in particular to a method, a device and a power generation system for realizing energy-saving control of a power generation system. Background technique [0002] Diesel generator set is a kind of small power generation equipment, usually refers to the power machinery that uses diesel fuel as fuel and diesel generator as the prime mover to drive the generator to generate electricity. When the diesel generator set is running, its fuel consumption rate (fuel consumption per unit of power generation) will increase as the load decreases. For example, the fuel consumption rate of a naturally aspirated small diesel generator set at 10% load can reach 3 of the rated fuel consumption rate. Therefore, it is meaningful to reduce the fuel consumption of diesel generator sets in low-load scenarios. [0003] At present, there is a scheme in the prior art that is applied to conventional generator sets to...

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Problems solved by technology

[0005] First of all, because it is applied to conventional generator sets, and general conventional generators have an excitation system, the performance of the excitation system determines that when the speed decreases, in order to maintain the constant voltage at the generator terminal, it is necessary to automatically increase the excitation current, the lower the speed The larger the excitation current, the higher the temperature rise of the rotor; so when this method is applied to conventional generator sets for speed regulation and fuel saving, there is a risk of burning the generator rotor windings; secondly, since the output of conventional generator sets is AC, in order to use after speed regulation The generator set still maintains the original frequency. In the scheme, a variable frequency compensator must be used to adjust the output frequency and voltage. However, the variable frequency compensator usually has a problem of low efficiency. If the loss caused by it is removed, the energy saving effect of the entire system will hardly be satisfied. Require

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