An Economic Dispatch Method of Power System Realized by Using 0-1 Integer Programming Model

Abstract

The invention provides an economic dispatching method of a power system achieved by a 0-1 integer programming model. The method comprises the following steps of determining a connection scheme and operating states of units of a wind-energy storage system; building a dynamic economic dispatching model of the power system containing prohibition intervals; determining an economic dispatching principle; handling an integer programming problem by adopting a branch and bound method; and carrying out simulation analysis on a calculating example by using matlab software. According to the method provided by the invention, a given load level is divided through a minimum daily load factor and a spare capacity rate and the operating state of a pumped storage power station are determined; and the operating state of the wind-energy storage system can be clearly described, the prohibition intervals of output of thermal power units can be quickly and effectively jumped over and the economic dispatching problem of the wind-energy storage system connected to the power system containing the prohibition intervals is solved. Spare capacity constraints containing the prohibition intervals are set, a simulation study is carried out on the calculating example by writing a BNB20 function through the matlab to research the influences of the prohibition intervals and the spare capacity on economic dispatching, and the simulation result proves that the method is effective.

Description

technical field [0001] The invention relates to a method for solving the problem of dynamic economic scheduling of a wind-storage hybrid system connected to a power system with prohibited intervals, especially a method for describing the operating state of the wind-storage system and selecting a feasible interval for a thermal power unit. Background technique [0002] In the economic dispatching of the power system in the future, the utilization of renewable energy will become inevitable. According to the actual situation in our country, wind energy is one of the key renewable energy sources for development. The randomness and anti-peaking nature of wind energy make it difficult to ensure balanced and continuous power supply. Therefore, while dispatching wind power, a corresponding energy storage solution is proposed to realize the synchronous dispatch of energy storage and renewable energy. [0003] Pumped storage is the most widely used physical energy storage method in th...

AI Technical Summary

Problems solved by technology

But in fact, due to the physical limitations of thermal power plant components, the vibration of some generator bearings may be amplified in some output ranges, which is very detrimental to the safe operation of the generator. Therefore, it is necessary to avoid generators running in these areas. These units set prohibition intervals

The addition of the forbidden interval makes the economic dispatch model become a non-convex model, which is difficult to solve

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