Tolerance determination method for fluctuation of industrial load of wind power-containing power system

Abstract

The invention discloses a tolerance determination method for fluctuation of an industrial load of a wind power-containing power system. The method comprises the following steps of 1, by taking the day-ahead predicted wind power and load as the basis information and by taking the lowest wind power wind curtailment amount as the target, solving the starting-stopping state of the conventional set inthe day-ahead plane, a wind power dispatching curve, and an expected industrial load curve; 2, determining an industrial load lower limit of the system by taking the minimum of the system industrial load as the optimized target according to the result solved in the step 1; adopting a tentative mechanism to gradually expand the extreme fluctuation range of the industrial load according to the results obtained in the first step and the second step, and by taking a condition that the extreme fluctuation energy can be consumed by the system as the criteria, determining the upper limit of the industrial load in the system; and 4, in the actual operation, if the industrial load is not between the expected lower limit and upper limit, determining that the power balance of the power system suffersfrom challenges. By virtue of the method disclosed in the invention, whether industrial load change challenges the power balance of the system or not can be quickly judged by a dispatching staff in an auxiliary manner, thereby facilitating adoption of measures in time.

Description

technical field [0001] The invention relates to the field of safe and economical operation of electric power systems, in particular to a method for determining industrial load fluctuation tolerance of wind power systems. Background technique [0002] The western region of my country has abundant wind energy resources but less power load, while the central and eastern regions have large power load and relatively scarce wind resources. The region's abundant wind power and other clean energy are transported to the central and eastern regions for consumption. At present, the Jiuquan-Hunan ±800 kV UHV DC transmission project has the transmission capacity and can be officially put into operation after the commissioning stage. The line can transmit 40 billion kWh of electricity every year, reaching a quarter of Hunan's total load. After the line is put into operation, the energy structure of the power receiving area will undergo profound changes. The penetration rate of wind power ...

AI Technical Summary

Problems solved by technology

But in fact, the essence of demand response to absorb wind power is to use the price mechanism to promote the consumption of wind power fluctuations on the electricity side

However, industrial enterprises decide their own electricity consumption behavior according to the electricity price. Once the electricity price causes the industrial load on the electricity side to fluctuate too much, and the target power system rotation backup is insufficient, the system may have to be thrown out of wind power in order to maintain safety and stability, affecting wind power. consumption

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