Smart operation apparatus and smart operation method of low-voltage generator of hydropower station

Abstract

A smart operation apparatus and a smart operation method of a low-voltage generator of a hydropower station are disclosed. A processor MCU is respectively connected with a simulation sampling circuit and a plurality of level sensors; a communication circuit and a remote monitor host computer for communication; an open-inlet open-outlet circuit, an open-outlet relay and telecommand detection; a protection circuit, a protection execution mechanism and fault recording; a power supply circuit, and a power conditioning circuit and generator guide vanes for adjusting the opening degree; and a memory circuit. The smart operation method includes the steps of detecting the water level of a reservoir on a real-time basis, the processor MCU determining the current water level of the reservoir, automatically adjusting the opening degree of the guide vanes of the low voltage generator, and introducing a negative feedback adjusting mechanism in the real time control of the opening degree of the guide vanes of the low voltage generator. The generating power of the generator is optimized, management and control of the power station is smarter, and power generation is more efficient. Unmanned on duty of a hydropower station and automatic operation are realized.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of electric power systems, and in particular relates to an intelligent operation device and an intelligent operation method for a low-voltage generator of a hydropower station. [0003] Background technique: [0004] At present, China's economy has entered a new period of development. While the national economy continues to grow rapidly and the process of industrial modernization is accelerating, resource and environmental constraints are tightening, energy supply is tense, and the pressure on the ecological environment continues to increase. [0005] Electric energy is the energy generated by different power stations. Power system power stations include thermal power stations, hydropower stations, nuclear power stations and new energy power stations. Hydropower stations are a unique and extensive energy station. They mainly use hydraulic impact to generate electricity. In the power system architectur...

AI Technical Summary

Problems solved by technology

[0008] At present, in the construction of small and medium-scale hydropower stations, the control mode of the operation of most low-voltage generator sets is mainly realized through the protection device of the low-voltage generator and the LCU control panel (local control unit); among them, the protection device of the low-voltage generator is mainly used for Generator start-stop and protection, the LCU control panel is mainly used for the control of turbines, generators, auxiliary machines, transformers, busbars, circuit breakers, disconnectors, grounding switches, etc.; in the hydropower station control system, although the low-voltage generator protection The device and the LCU screen cabinet can realize the automatic control of the low-voltage generator and the online monitoring and remote control of other equipment to a certain extent. However, in the adjustment of the active power and reactive power of the generator, it is still necessary The water level is used to judge and manually adjust the output power of the generator, and in some equipment that does not have the data recording function, the transient data of the power station failure and its operating parameters cannot be saved, which is inconvenient for the maintenance and operation of the unit. Analysis of power station load

[0009] Take the power regulation of the generator set as an example. As we all know, the output power of the generator is mainly determined by the prime mover in hydroelectric power generation. The prime mover is determined by the opening of the guide vane and the height of the water level. The larger; theoretically, under the maximum generating power that the generator itself can withstand, the larger the opening of the guide vane, the greater the output power of the generator, but the opening of the guide vane determines the water output on the other hand. Size, that is, if the water output is greater than the upstream water intake of the reservoir, the water level of the reservoir will continue to decrease. When it is reduced to the point where it cannot generate enough driving force, the generator will switch from the original power generation mode to the motor mode, and the entire generator system will be It will absorb the power of the grid, not only can not generate electricity, but also consume the power of the grid in vain. Therefore, when the water level drops to a certain value, it is necessary to adjust the opening of the guide vane to make the water level of the reservoir reach a dynamic balance, so as to obtain sustainable Power generation process; in this dynamic balance adjustment process, the opening of the guide vane is a very critical control quantity; in small and medium-sized hydropower stations, the opening of the guide vane is generally adjusted through the artificial judgment of the station guards on the water level. It has a low degree of automation and requires round-the-clock monitoring by on-duty personnel

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