Unit combination method considering demand utility

Abstract

The invention discloses a unit commitment method considering demand utility. The method comprises the following steps: constructing a target function for unit combination, and constructing a unit combination model; establishing constraint conditions for the unit combination model; solving the unit combination model according to constraint conditions; and obtaining the total generating capacity ofeach unit combination and the total electricity consumption of each user, wherein the target function is obtained by subtracting a power generation cost function from the sum of all user utility functions.

Description

technical field [0001] The disclosure belongs to the technical field of power system unit combination, and in particular relates to a unit combination method considering demand utility. Background technique [0002] Unit combination is the key and core link in power system operation decision-making. Its purpose is to formulate a daily or weekly plan for unit start-up and shutdown under the guidance of the goal of minimum cost (including quasi-fixed cost). The reserve capacity of the time period, and meet the needs of the expected load and its fluctuations. The unit combination belongs to the third regulation in the dispatching and control of the power system. In fact, it is the pre-decision of the power generation plan of the non-AGC unit in a long period, and the decision-making of the adjustment capacity and the adjustment capacity allocation of the AGC unit. The core advanced scheduling and control strategy (secondary adjustment) and real-time control (primary adjustment...

AI Technical Summary

Problems solved by technology

Judging from the current research situation, the addition of active loads undoubtedly improves the ability of the unit combination to deal with uncertainties, but the decision-making quantity of active loads only participates in the expected power balance constraints, and its power is locked within the research period, and the active loads are completely controlled by active loads. The power supply assumes backup, so as to concentrate on dealing with conventional loads (high prediction accuracy, large access scale) and passive power sources (low prediction accuracy, relatively small access scale) that jointly cause two types of strong uncertainty problems

This will inevitably lead to the active power supply having to deal with these two types of uncertainties at the same time. Under the situation that the dominant position of the active power supply is gradually weakened and the passive power supply is developing rapidly, it is easy to cause the invalidity of the backup response strategy (AGC), and load shedding, abandonment of wind power generation, etc. Phenomenon

[0006] The inventor found that the reason is that the role of active load cannot be fully exerted in the time-varying process, so that it cannot effectively deal with strong uncertainties, and cannot achieve effective cooperation with passive load

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