Load optimization distribution method and system for plant-level automatic generation control system of thermal power plant

Abstract

The invention discloses a power plant level automatic power generation control system applied load optimizing and distributing method. The method is carried out through the following steps: pre-classifying a plurality of sub-clusters of generator sets according the properties of the generator sets of the power plant; optimizing and distributing load to the plurality of sub-clusters of generator sets according to the principle of using the least amount of coals; attaining the best load state space of each generator set in each sub-cluster of the generator sets within an allowed load and storing best load state space in a database of a system; performing load distribution according to a speed regulation priority method or a coal consumption optimizing method so as to check the best load state space of the sub-clusters of generator sets and attaining the best load of all generator sets in the power plant with the attained best load of all machines transmitted to an automatic control system through a monitoring apparatus of a plant level AGC system. The invention further provides a system corresponding the method. According to the invention, the method is capable of effectively shortening the calculation and distribution time for load when a power plant comprises a great number of generator sets with vast type difference so as to fulfill the requirement of safety control to a power grid and to improve the authenticity and the accuracy of an optimization result.

Description

technical field [0001] The invention belongs to the field of plant-level load dispatching of thermal power plants, and mainly relates to a load optimization distribution method and system for a plant-level automatic power generation control system of thermal power plants. Background technique [0002] In order to meet the requirements of power grid energy-saving dispatching and reduce power plant energy consumption, the load distribution mode of some power plants has changed from unit automatic generation control (stand-alone AGC) to plant-level automatic generation control (plant-level AGC), that is, under the premise of satisfying the safe operation of the power system , The active power command of the whole plant is issued by the central adjustment, and each unit in the plant responds to the change of the grid load command according to its actual situation, so as to simplify the operation of the power plant and realize the optimal distribution of the load of each unit in t...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a load optimization distribution method for the plant-level automatic power generation control system of a thermal power plant to solve the problem of long calculation time and poor real-time performance when performing online load optimization distribution under the condition of large number of units and large model differences At the same time, when adopting the load optimization distribution strategy with the goal of optimizing coal consumption, a method for updating coal consumption characteristics is provided to make the optimization results more realistic and accurate

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