A real-time control method of output power of hydropower station to ensure the stability of discharge flow and downstream water level

Abstract

The invention discloses a real-time control method for the output power of a hydropower station to ensure the stability of the discharge flow and the downstream water level, and quickly analyze and calculate the operation data within a period of time under the premise of relatively low resource consumption. The present invention can not only greatly reduce the number of variables generated in the calculation process, but also not excessively reduce the flexibility of power regulation. For example, it is required that the water level in the downstream of the hydropower station does not exceed 1 meter within 60 minutes. T 2 When it is 5 minutes, the number of temporary storage variables does not exceed 30, and the effect is to ensure that the downstream water level does not change more than 1 meter during the random change period of 60 minutes to 65 minutes, which is very close to the original safety Restrictions.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric power generation control, and relates to a method for real-time control of the output power of a hydropower station to ensure the stability of the discharge flow and the downstream water level. Background technique [0002] Some hydropower stations have strict requirements on the changes of downstream water level and discharge flow due to their special geographical location. The maximum variation per unit time of the flow (real-time discharge flow) and the downstream water level determines the maximum variation per unit time of the discharge flow. The discharge flow of hydropower stations includes power generation flow and flood discharge flow. The power generation flow is determined by the power generation load (that is, the total active power of the power station) and the water consumption rate. Therefore, it is required that the change of the overall output active power of the hydropower ...

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Problems solved by technology

[0005] 2. The hydropower station undertakes the peak-shaving task of the power grid, and the output power is greatly adjusted in a short period of time, resulting in a large change in the power generation flow in a short period of time

Different from problem 1, which is completely based on real-time data, the main difficulty of problem 2 is that the range in which the operator or the automatic generation control (AGC) can adjust the power of the power station depends on the past period of time (for example, 1 hour). The calculation and judgment of the safety constraints formed by the operation of the power station involves logic processing with a large amount of historical data as the object, which exceeds the functions configured by most computer monitoring systems for real-time monitoring and control of hydropower stations

In order to ensure the safety of downstream shipping, people's production and life, water workers and other facilities, the downstream water level must not vary by more than 1 meter per hour. Since no automatic control method matching this safety constraint has been proposed, the power plant has been operating since 2008. Since it was put into production for more than ten years, it can only operate with base load, and cannot undertake the peak regulation task of the power grid, resulting in a huge waste of secondary frequency regulation resources of the power grid

Document 3 "Thoughts on the relationship between power generation and shipping in Jinghong Power Plant" (Mechanical and Electrical Technology of Hydropower Stations, Vol. Issue 88), Document 5 "The Impact of Jinghong Hydropower Station on the Navigation Conditions of the Downstream Near the Dam" (Journal of Water Conservancy and Water Transport Engineering, Issue 4, 2012, Page 103), etc. Or propose automatic control means to ensure the stability of downstream water level or power generation flow

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