Water-fire-electricity system trans-provincial peak-regulating load distribution method

Abstract

The invention belongs to the field of electric power system dispatching, and discloses a water-fire-electricity system trans-provincial peak-regulating load distribution method. According to the water-fire-electricity system trans-provincial peak-regulating load distribution method, the method is based on the characteristics of load changes of a plurality of provincial level power grids, a load sequencing strategy is brought in, and each power grid load sequencing position of time frames serves as heuristic information to conduct force output distribution. According to the technical scheme of the water-fire-electricity system trans-provincial peak-regulating load distribution method, the initial electricity receiving and force output process of each power grid is acquired through successive load shedding, output force of the time frames corresponding to all grids is accumulated, a time frame set going against the power station electric power balance limit is confirmed; as to any output force positive deviation time frame, a power grid with the maximum surplus load order position value is searched, the power output force of the grid at the time frame is further reduced, and meanwhile a negative deviation time frame with the maximum surplus load value is confirmed; the output force of the time frame is increased according to the same amplitude, and the force output process is repeated until all time frames satisfy the electric power balance limit. According to the water-fire-electricity system trans-provincial peak-regulating load distribution method, a target function does not need to built, the amount of optimizing calculation is substantially reduced, an optimizing result satisfying actual engineering requirements can be fast acquired, and the method is achievable, and has important theoretical and practical significance in regulating and controlling large power grid electricity resource distribution and relieving increasingly-serious power peak regulation pressure.

Description

technical field [0001] The invention belongs to the field of electric power system dispatching, and relates to a load distribution method for cross-provincial peak regulation of hydrothermal power systems, which uses the load sorting position of each power grid as enlightenment information. technical background [0002] The contradiction between power supply and demand in my country is very prominent, and has distinct regional characteristics. In regions such as East China, North China, South China, and Central China, there are often tight power supply situations during peak hours, and even persistent power shortages, which seriously affect regional power grids and some provincial power grids. Stable and high-quality operation of the power grid. Taking the situation of power supply and demand in 2010 as an example, in the first quarter, North China and Central China faced severe power shortages, with the largest daily power gap reaching 18.79 million kW; The power grids unde...

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Problems solved by technology

[0004] Under the interconnected power system platform, high-quality power supplies usually need to transmit power to multiple provincial (municipal) power grids. However, due to the different load characteristics and received power of each grid, especially the large differences in load peaks and peak times, It is very difficult to meet the peak-shaving requirements of multiple provincial (municipal) power grids at the same time. The existing method of allocating the output of each time period according to the proportion of power transmission cannot obtain satisfactory results. At present, there are few literature reports on this research at home and abroad. , there is an urgent need for a feasible cross-provincial peak load distribution method

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