Daily on-off type peak load operation method of gas engine set

Abstract

The invention, which relates to the field of power grid planning and scheduling operation, provides a daily on-off type peak load operation method of a gas engine set. The power grid and the difference between the peak and valley increase rapidly, so that the peak regulation pressure of the system increases continuously; and the peak regulation pressure of the power grid increases further because of the influence of large-scale feeding of the extra-high-voltage direct-current power. The scheduled electric quantity is used as the single-machine control object; the start-up time range is determined by considering the upper limit and the lower limit of the output; and a feasible continuous start-up time set is searched and determined by using a load value as heuristic information. With consideration of the adjustable output lower limit, the high-peak output process of each start-up scheme is determined in an optimized manner by using an improved load shedding strategy; and an optimal start-up operation scheme and a set generating plane are selected based on a criterion of residual load mean square error minimization. According to the method provided by the invention, the peak regulation space of the gas engine set at the peak load time is released fully, so that the tracking and response capability of the grid peak load is improved effectively; and the grid peak regulation demand and the gas engine set operation restriction are considered simultaneously.

Description

technical field [0001] The invention relates to the field of power grid planning and dispatching operation, in particular to a peak-shaving operation method for daily start-up and shutdown of a gas-fired unit. [0002] technical background [0003] In recent years, my country's power grid load and its peak-to-valley difference have increased rapidly, and the system's peak-shaving pressure has continued to increase. Especially in the eastern and central power grids dominated by thermal power, the peak-shaving problem is more prominent, and is affected by the large-scale feed-in of UHV DC power. , a large number of coal-fired power units were forced to undergo in-depth mediation or even complete mediation, which further increased the pressure on the power grid for peak regulation. Therefore, how to efficiently utilize the capacity of high-quality peak-shaving power supply has become an important measure to alleviate the difficulty of peak-shaving power grid with a large proporti...

AI Technical Summary

Problems solved by technology

This mode of operation can effectively reduce the peak-to-valley difference of the power grid, but it is not sensitive to load level fluctuations, and it is difficult to adjust the local load "glitch", which reduces the peak-shaving space of the unit; moreover, due to the daily power limit of the gas-fired power station, It is generally difficult to take into account the peak load in the evening when gas-fired units in the network are started simultaneously during peak hours, which may lead to excessively high evening load levels, which is not conducive to the arrangement of subsequent power generation plans. More reasonable and efficient peak-shaving operation methods for gas-fired units are urgently needed to fully utilize this Peak-shaving level of high-quality power supplies, to cope with increasing peak-shaving difficulties

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