A multi-objective overload decision-making method based on interruptible load

Abstract

The invention discloses an interruptible-load-based multiple-target overloading assistant decision making method. Contribution indexes of an interruptible load for reducing two target functions, namely an interruptible load cutting total amount and an interruptible load cutting total number, are respectively computed; a comprehensive contribution index of the interruptible load to the two target functions is computed by utilizing linear weighting factors; the linear weighting factors are divided into different grades; an overloading assistant decision making measure corresponding to each grade of the linear weighting factor is computed; and the final measure is selected via a scheduling operator. By applying the interruptible-load-based multiple-target overloading assistant decision making method, multiple-target optimization can be performed according to the contribution indexes of the interruptible load to the target functions, an effective solution set meeting the computation precision is given out, and coordinate optimization of reduction of the two target functions, namely the interruptible load cutting total amount and the interruptible load cutting total number, is implemented.

Description

technical field [0001] The invention relates to a multi-objective overload auxiliary decision-making method based on interruptible load, which belongs to the technical field of power system automation. Background technique [0002] In the case of insufficient generator backup in the power grid at the receiving end, load control is required to eliminate the overload of equipment in the power grid. The proportion of UHV DC transmission capacity in the scale of the receiving end system continues to increase, and DC blocking faults cause large power impacts. Under the action of system frequency modulation characteristics, the increase in generator output may lead to a more stable limit for power flow at the transmission section, which affects load control. Scale and responsiveness place greater demands. [0003] The traditional load control does not consider the actual situation of the user side. Large-scale and non-selective centralized load shedding will not only cause huge e...

AI Technical Summary

Problems solved by technology

The proportion of UHV DC transmission capacity in the scale of the receiving end system continues to increase, and DC blocking faults cause large power impacts. Under the action of system frequency modulation characteristics, the increase in generator output may lead to a more stable limit for power flow at the transmission section, which affects load control. Scale and responsiveness place greater demands

[0003] Traditional load control does not take into account the actual situation on the user side. Large-scale and non-selective centralized load shedding will not only cause huge economic losses, but also have low user acceptance in the electricity market environment.

Limited by the modeling range of the EMS system, it is difficult for provincial dispatching agencies to directly perceive the controllable load capacity in the power grid. They can only share the amount of load shedding to eliminate overload among various cities according to a preset ratio. pull the way for load control

When the control amount of a prefecture-level dispatching organization is insufficient, the provincial-level dispatching organization needs to perform auxiliary decision-making calculations again according to the system operation status after the execution of the accident pulling route, which cannot meet the rapid requirements for accident handling in complex fault scenarios

Images