Control system and method for high-pressure oil jacking device of pumped storage unit
A technology of pumped storage unit and jacking device, which is applied in the direction of pump device, pump control, engine lubrication, etc. It can solve the problem of high-pressure oil supply during operation, cannot be realized accurately and reliably, and is simple, so as to achieve accurate oil protection, The effect of ensuring reliable operation
Pending Publication Date: 2021-11-19
ANHUI XIANGSHUIJIAN PUMPED STORAGE +2
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Problems solved by technology
However, this input control method is too simple to accurately and reliably realize the control of the high-pressure oil jacking system / device, and if the control of the high-pressure oil jacking system is inaccurate and cannot provide high-pressure oil for the operation of the unit, it will It leads to the operation safety accident of the pumped storage unit, so it is necessary to design a safe and reliable control system for the high pressure oil jacking system of the pumped storage power station
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[0024] The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.
[0025] The high-pressure oil jacking control system of this application shall adopt redundant configuration, including power supply, PLC input and output modules, and the system shall have automatic switching capability. The high-pressure jacking oil pump has three control methods: remote automatic, local manual, and cut off. The high-pressure oil jacking device is equipped with two oil pumps, one AC oil pump is the main pump, and the other DC oil pump is the backup pump. The starting methods of the high-voltage oil pump motor include direct start, soft start, and inverter start; direct start is to start the motor directly under full voltage conditions; soft start is mainly to share part of the voltage drop by connecting variable resistors in As the start-up time goes by, the voltage drop ...
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The invention discloses a control system for a high-pressure oil jacking device of a pumped storage unit. The control system comprises a control module and an oil level monitoring element, the high-pressure oil jacking device comprises an alternating-current pump and a direct-current pump, the alternating-current pump is a main pump, the direct-current pump is a standby pump, the input end of the control module is connected with a unit state acquisition module, and the control module is used for controlling running of the alternating-current pump or the direct-current pump so as to inject high-pressure oil when the unit is in a start-stop state and a crawling state; the oil level monitoring element is mounted in an oil collecting tank, and the output end of the oil level monitoring element is connected with the control module; and the control module is used for forbidding the unit to be started and run according to an oil level signal when the oil level is abnormal. The control system has the advantages that the control system of the high-pressure oil jacking device can achieve start and stop more accurately and reliably, and therefore reliable oil is provided for unit running; and the two oil pumps, the main oil pump and the standby oil pump, are adopted, and reliable running of the system is guaranteed.
Description
technical field [0001] The invention relates to the field of hydropower generation, in particular to a control system and method for a high-pressure oil jacking device of a pumped storage unit. Background technique [0002] It is of great significance to install a high-pressure oil jacking device for the thrust bearing of a hydro-generator. When the hydro-generator is in normal operation, there is fluid friction in the thrust bearing. Under other conditions being the same, the wedge-shaped oil film thickness between the bearing bush and the mirror plate is inversely proportional to the unit pressure. In a large hydroelectric generator set with a large thrust load, the wedge-shaped oil film between the mirror plate and the bearing bush becomes thinner due to the increase of the unit load. Especially in the process of starting and stopping, low speed operation is more likely to produce dry friction, which will cause serious wear of the bearing bush, and even the unit cannot ...
Claims
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IPC IPC(8): F04B49/06F04B49/02F04B49/10F04B15/02F04B23/04F16N7/30F16N29/04F03B13/06
CPCF04B49/065F04B49/02F04B49/022F04B49/10F04B49/103F04B15/02F04B23/04F16N7/30F16N29/04F03B13/06F04B2207/70F04B2207/703F16N2210/14Y02E60/16Y02E10/20
Inventor 姜涛孔祥武谢加荣强杰王海龙李红卫卢玉林余忠伟胡海龙刘远伟
Owner ANHUI XIANGSHUIJIAN PUMPED STORAGE