Hydropower PLC intelligent control system

Abstract

The invention discloses a hydropower PLC intelligent control system, which comprises a program control processor, a power grid parameter sensor, a power generation parameter sensor, a simultaneous detection sensor, a power generator rotation speed sensor, a grid-connected contactor, an external button, a water level height sensor, a bearing temperature sensor, a water valve adjustment executor, an excitation controller, a touch screen, an internet of things server, a short message sensing device, and a backup power supply. The hydropower PLC intelligent control system has the beneficial effects that the controlled is adopted for concentrated control, decentralized collection is realized, and one-button start and automatic grid connection are carried out steadily and quickly; water level automatic tracking is set, and water level overflow is eliminated; data can be clearly and intuitively displayed, and different needed parameters can be set for automatic control; the rotation speed and the power grid condition can be monitored, and multiple protection mechanisms such as the backup power supply are quick and effective; intuitive display of the power grid and power generation parameters can be realized, and the current real-time power rotation speed of the power generator can be detected; and operation of the equipment can be monitored and controlled via each terminal in a place with network globally.

Description

Technical field [0001] The invention belongs to the field of hydropower engineering, and specifically relates to a hydropower PLC intelligent control system. Background technique [0002] Electricity is an indispensable power energy for modern industrial production and life, and hydropower is a category of the electric power industry. Over the past 60 years since the founding of the People’s Republic of China, my country’s hydropower industry has made considerable progress and achieved remarkable results. However, most of the small and medium-sized hydropower stations in my country still have the following problems: [0003] 1. Full manual operation. When connecting to the grid, manually turn the water valve and monitor the meter. When it is close to the same period, both the water valve and the excitation voltage must be fine-tuned, which is difficult to control manually. [0004] 2. During the same period, it is necessary to look at the status of the indicator light and manually ...

AI Technical Summary

Problems solved by technology

[0003] 1. Fully manual operation. When connecting to the grid, it is necessary to manually turn the water valve and monitor the instrument. When it is close to the same period, it is necessary to fine-tune the water valve and the excitation voltage, which is difficult to control manually.

[0004] 2. At the same time, it depends on the state of the indicator light and manually press the closing button. The timing is difficult to grasp and it is easy to fail. It requires a skilled old electrician to operate

[0005] 3. The water gate is adjusted manually, and the water level is known by monitoring or the indication of the water float switch. Under normal circumstances, workers adjust the valve to a small value for safety reasons, especially at night, so that water often overflows, causing water resources waste

[0006] 4. The power factor adjustment is adjusted by adjusting the excitation voltage. On-site tests found that most of the power factor tables are inaccurate and the linearity is relatively poor; on the other hand, as the voltage fluctuates, the excitation voltage will also fluctuate accordingly. It is impossible to achieve real-time tracking and adjustment, so that a lot of reactive power will be sent out, which will have a certain impact on the quality of the entire power

[0007] 5. When the power grid fails or the excitation system is damaged, it cannot be shut down in time, resulting in a speeding accident. Workers are required to be alert at all times and monitor the operation status of the equipment

[0008] 6. It is difficult to grasp the blockage of the reservoir fence

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