Early-warning coordination rolling optimization method for minimizing surplus water of hydraulic power plant

Abstract

The invention relates to an early-warning coordination rolling optimization method for minimizing surplus water of a hydraulic power plant. The method comprises the steps of fitting a related curve according to acquired hydraulic power plant data; setting a rolling calculation period and calculating an actual interval, and reading real-time water condition data and a current planned output of a set; deriving the water condition in a next time period according to each fitting curve, and deriving the surplus water flow in each time period; generating a corresponding surplus water early-warning according to the surplus water flow; after early-warning is generated, performing optimization correction on the output power of the corresponding power generating set; and outputting early-warning information and optimizing a correction strategy. According to the method, whether surplus water occurs in the whole calculation period occurs is determined according to a current power generation plan and a current actual operation condition; and furthermore when a surplus water condition occurs, the output power of each power generating set is adjusted in time for minimizing the total surplus waterof the hydraulic power plant. A problem of improper adjustment according to human experience in a traditional method is settled.

Description

technical field [0001] The invention relates to the field of dispatching operation and optimization of electric power systems, in particular to a minimum early warning coordinated rolling optimization method for water abandonment in hydropower plants. Background technique [0002] Southwest my country is rich in water resources. However, under the current slowdown in electricity demand growth, hydropower consumption capacity is limited, coupled with the concentration of precipitation during the flood season and insufficient capacity of external delivery channels, the phenomenon of water abandonment is very prominent. In addition, in the actual operation of the water-fired power system, there are also the following two problems: [0003] On the one hand, the daily unit output of each power plant is given by the day-ahead scheduling plan. However, due to the large-scale access to new energy (mainly wind power and photovoltaic power generation) generation output prediction erro...

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Problems solved by technology

[0003] On the one hand, the daily unit output of each power plant is given by the day-ahead scheduling plan. However, due to the large-scale access to new energy (mainly wind power and photovoltaic power generation) generation output prediction errors and system total load prediction errors, in extreme cases , if it is still carried out according to the current power generation plan, it will cause a large power imbalance and endanger the safety of the system

[0004] On the other hand, since most hydropower plants do not have water personnel, and the basin cascade lacks a unified optimization dispatch coordination mechanism, the dispatcher on duty mainly adjusts hydropower generation plans and strategies artificially based on experience, and it is difficult to effectively grasp the decision-making process of basin dispatch by relying on experience for real-time dispatch If the output of some units is temporarily adjusted, it may also cause unnecessary water abandonment in some hydropower plants due to improper adjustment.

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