An Intelligent Low-Frequency Load Shedding Control Method Considering User Comfort

Abstract

The invention discloses an intelligent under-frequency load shedding control method considering user comfort level. The method comprises the following steps: A) collecting frequency information of a power grid at fixed time intervals by a grid control center, and calculating the frequency change rate; B) detecting user-set comfort level ideal value and acceptable range of intelligent household devices, importance degree of the intelligent household devices and intelligent household device load working condition; C) calculating grid fault severity index, and comfort level out-of-limit index of the intelligent household devices; and D) carrying out control on the intelligent household devices according to the frequency change, the grid fault severity index, the comfort level out-of-limit index of the intelligent household devices and the importance degree of the intelligent household devices. The method can judge the operating state of the power grid by utilizing real-time power grid information, and allows the user to set the comfort level range of controlled intelligent household appliances and response priority thereof so as to carry out automatic interrupt control on the intelligent household devices.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a novel low-frequency load shedding control method under the coordinated control of an intelligent terminal and an intelligent home appliance. Background technique [0002] For a long time, as an important technical equipment of the third line of defense for safety and stability, the low-frequency load shedding device has played an important role in ensuring the safe and stable operation of the power system. The promotion and application of smart terminal devices such as smart meters and smart home appliances on the user side in the smart grid environment provides rich dynamic response information for the security and stability control of the power system. [0003] Through the research on the intelligent demand response technology and the low-frequency load shedding method in the third line of defense, it is found that the intelligent demand response can mobilize the fast...

AI Technical Summary

Problems solved by technology

At present, the configured low-frequency load shedding device operates based on the local electrical quantity. Although it is beneficial to ensure the reliability of the device itself, it is not conducive to the coordination and optimization of the overall control behavior of the system, and it does not make full and reasonable use of the interruptible power on the load side. resource

[0004] The traditional low-frequency load shedding device can only operate when the grid frequency drops to a certain extent, and there is no interruptible resource available to coordinate the load side. Therefore, it needs to be combined with intelligent demand response technology. On the premise of ensuring user comfort, Find the coordinated control mechanism between the quick response resources on the load side and the third line of defense

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