Method and device for improving oil supply reliability of lubricating oil system of generating set

Abstract

The invention relates to a method and a device for improving the oil-supplying reliability of a lubricating-oil system of a power generating set. The method is characterized in that in a control logic of a DCS (Distributed Control System) of the lubricating-oil system of the power generating set, when the low voltage of a safety section is related to tripping, additionally setting time delay of 2-5 seconds for an alternating-current lubricating-oil pump, so as to avoid the voltage-loss time of the alternating-current lubricating-oil pump for 1-2 seconds when a power switch of the safety section is switched, and ensuring no tripping of the alternating-current lubricating-oil pump when the power switch of the safety section is switched; setting a low-voltage instantaneous linked starting condition of the safety section in the hard-wiring condition of related starting of a direct-current lubricating-oil pump, setting a low-voltage instantaneous starting condition into failure of the alternating-current lubricating-oil pump in the linking logic of the direct-current lubricating-oil pump, and ensuring that oil pressure is provided by the direct-current lubricating-oil pump when in short-time voltage loss of a power switching bus of the safety section. The method and the device have the advantages that the oil-supplying reliability of the lubricating-oil system of the power generating set is improved from two aspects, the reliability is high and normal oil supplying of the lubricating-oil system at the low voltage of the safety section and under the condition that the alternating-current lubricating-oil pump fails is ensured.

Description

technical field [0001] The invention relates to a method and a device for improving the oil supply reliability of a lubricating oil system of a generator set. The invention belongs to the technical field of a gas turbine lubricating oil control system. Background technique [0002] In large gas turbine power plants, according to technical requirements, generator sets should ensure that important loads do not trip when electrical power is switched, which requires that the oil supply of the lubricating oil system of the generator set cannot be interrupted. In the prior art, the applicant found that in the lubricating oil pump control system of the self-owned generator set, since the AC lubricating oil pump in the security section of the DCS system is not equipped with a delay circuit, when the power switch of the security section fails to switch, the security section There will be a pressure loss time of about 1 second, which will trip the AC lubricating oil pump, causing the...

AI Technical Summary

Problems solved by technology

[0003] One of the purposes of the present invention is to provide a method for improving the oil supply reliability of the lubricating oil system of the generator set in order to solve the problem that the reliability of the lubricating oil supply will be affected when the power switch of the security section is switched.

Images