A method, device and system for realizing speed control of generator set

Abstract

A method for controlling speed of an electric generating set and device and system thereof are provided. The method includes acquiring updated minimum fuel consumption curve of the electric generating set, detecting current output power of the electric generating set, finding the speed corresponding to output power of the electric generating set by means of the updated minimum fuel consumption curve and putting the electric generating set to work with the speed. The system can reduce impact of aging on the system performance of the electric generating set, and can put it to work on the state of maximum efficiency.

Description

technical field [0001] The invention relates to the technical field of control, in particular to a method, device and system for realizing the speed control of a generating set. Background technique [0002] A diesel generator set is a small power generation equipment, which refers to a power machine that uses diesel oil as a fuel and a diesel engine as a prime mover to drive a 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 2.5% of the rated fuel consumption rate. ~5 times, so it is very meaningful to reduce the fuel consumption of diesel generator sets in low-load scenarios. [0003] The traditional diesel generator set is used as an AC power source, and the frequency of its output AC power is constant, so the speed of the ...

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Problems solved by technology

[0004] However, the current A-A minimum fuel consumption curve is usually determined when a new diesel generator set leaves the factory, and does not change when the diesel generator set is in service; however, since the A-A minimum fuel consumption curve will change with the aging of the generator set The reason is that the use of the constant A-A minimum fuel consumption curve cannot meet the current fuel-saving problems of diesel generator sets under low-load operation; therefore, the existing main fuel-saving solutions for low-load operation scenarios of diesel generator sets include: increase dummy load, increase energy storage unit or speed control etc.

[0005] Among them, the scheme of increasing the dummy load improves the load rate of the diesel generator set by increasing the dummy load, thereby reducing the fuel consumption rate. Although it can partially reduce the fuel consumption rate of the diesel generator set, the dummy load consumes energy ineffectively, which brings new problems. Waste, poor fuel saving effect; the solution of adding energy storage unit is to store the excess energy of diesel generator set by adding energy storage unit, and release the electric energy when the diesel generator set is not working or the load is heavy, but this solution requires too much additional equipment , high cost, and when the battery is in the floating charging condition, the problem of high fuel consumption rate of the diesel generator set at low load still cannot be solved; the speed regulation and fuel saving scheme only adjusts the fuel consumption by roughly adjusting the speed, which cannot achieve a good Fuel-saving effect, and therefore, the speed regulation and energy-saving effect of this scheme on different types of diesel generator sets is quite different, and the operability and scalability are poor.

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