Primary and secondary frequency modulation comprehensive optimization system for double asynchronous feedback thermal power generation

Abstract

The invention provides a primary and secondary frequency modulation comprehensive optimization system for double asynchronous feedback thermal power generation. The system comprises a detection device, an acquisition device, a processing device, a feedback device, a frequency modulation device and a processor; the detection device is configured to detect electric quantity of a load side; the acquisition device is configured to acquire the ratio of the electric quantity of the supply side to the electric quantity of the load side and respond to the frequency modulation of the electric quantitybased on the ratio; the processing device is configured to optimize the ratio of the power supply side to the load side; the feedback device is configured to feed back the use condition of the electric quantity of the supply side and respond to the frequency modulation operation of the frequency modulation device; the feedback device is configured to acquire signals of a supply side and a load side of the generator. Through cooperative use of the acquisition device and the feedback device, output data after frequency modulation are fed back and acquired, and the stable control time of a powergrid is prolonged effectively.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a comprehensive optimization system for primary and secondary frequency regulation of thermal power generation with double asynchronous feedback. Background technique [0002] With the development of new energy power generation technology and the improvement of the stability requirements of the existing power grid, the new energy power station is connected to the grid and participates in primary frequency regulation to further improve the frequency anti-interference of the power grid. [0003] For example, the prior art of CN109995087A discloses a frequency modulation control method, device and frequency modulation system of a power station. Due to the uncertainty of illumination conditions and external load changes, etc., the frequency modulation power demand of the grid may be greater than the reserved power of the photovoltaic array. If the photovoltaic output...

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Problems solved by technology

[0003] For example, the prior art of CN109995087A discloses a frequency modulation control method, device and frequency modulation system of a power station. Due to the uncertainty of illumination conditions and external load changes, etc., the frequency modulation power demand of the grid may be greater than the reserved power of the photovoltaic array. If the photovoltaic output is not restricted but the requirements of the power grid output command are blindly met, the DC support working voltage of the photovoltaic inverter DC terminal will be lowered, causing the inverter to shut down and other faults

Another typical prior art such as WO2019015255A1 discloses a method and device for controlling the output power of a wind turbine, and a prior art such as WO2018120652A1 discloses a method and device for distributing active power of a wind farm, During the frequency modulation control, the active power value that needs to be changed by each unit is not calculated reasonably, resulting in the active power value that needs to be changed by some wind turbines is much greater than that of other wind turbines, making the entire wind power system The active power value changed by each wind turbine in the field is not uniform, resulting in a longer response time for the entire frequency modulation control, and a greater impact on the wind turbine during frequency modulation control

[0004] In order to solve the common problems in the field of inability to perform accurate frequency regulation, wasting power output, long frequency response time, large impact on the power grid, and fluctuations in the power grid, the present invention is made

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