Starting mode of high power diesel engine driven by generator in reverse direction

Abstract

The invention belongs to the technical field of machinery, and relates to a starting mode of a high power diesel engine driven by a generator in a reverse direction. According to the related startingmode of the high power diesel engine driven by the generator in the reverse direction, the generator adopts a combination of the diesel engine and an asynchronous generator, the starting mode is as follows: firstly, an outside high voltage alternating current power supply is connected with a converter, the converter converts voltage of the outside high voltage alternating current power supply intorated voltage of a frequency-variable and speed-variable generating unit, and the voltage is provided for the frequency-variable and speed-variable generating unit. Meanwhile, the converter activatesa unit control box and sends a generating unit electric starting instruction, the generating unit operates in an electric starting state after energization, and starts to rotate and drives the dieselengine to rotate in the reverse direction through a disc coupling or a high-elastic coupling, a generating unit control system instructs an oil sprayer to carry out oil spraying after the rotating speed of the diesel engine reaches a set rotating speed, and the diesel engine is ignited and started smoothly. The mode can reduce the waste of fuel oil, and reduce discharging pollution.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a starting method for a generator reversely driving a high-power diesel engine. Background technique [0002] At present, high-power diesel generator sets are mainly composed of diesel engines, generators, and public bases. The starting method of the traditional generator set is: the diesel engine drives the diesel engine to rotate through the electric motor, air motor, spring motor, hydraulic motor and other starting devices, and the diesel engine drives the generator to rotate through the disc coupling or high elastic coupling. When the ignition speed of the diesel engine is reached, the governor controls the injector to inject fuel, and the diesel engine starts successfully, which in turn drives the generator to generate electricity and output electric energy to the outside. [0003] But the traditional starting method has the following problems: (1) The low-speed starting pr...

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Problems solved by technology

[0003] But the traditional starting method has the following problems: (1) The low-speed starting process of the diesel engine has low-efficiency combustion, which wastes fuel and produces a lot of black smoke, which deteriorates the emission index

(2) The starting time is generally 5-15s, and the starting time is longer

(3) Once the starting device fails, the generator set cannot start, and the reliability is poor

(4) When multiple units are connected to the grid, professional and technical personnel need to make repeated adjustments, and the workload is relatively large

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