An auxiliary frequency modulation method for cluster temperature controlled loads to participate in power network AGC

Abstract

The invention provides an auxiliary frequency modulation method for cluster temperature control loads to participate in power network AGC. The dynamic characteristics of temperature control loads anduser comfort are analyzed to evaluate the adjustable capacity range of cluster temperature control loads; according to the different intervals of Area Regulation Requirement (ARR) signals, the coordinated control principle of dynamically distributing the AGC secondary frequency modulation demand to the conventional generating unit and the temperature control load is formulated, the operation timeof auxiliary frequency modulation of the temperature control loads, the operation depth and specific operation mode are determined so as to make full use of the performance advantage of temperature control load without affecting the comfort of users, reduce the frequency modulation pressure of conventional units, speed up the frequency regulation speed, restrain the power fluctuation of tie line of interconnected power network, and effectively improve the frequency modulation effect of power network.

Description

technical field [0001] The invention belongs to the technical field of automatic power generation control of electric power systems, and in particular relates to an auxiliary frequency regulation method for cluster temperature-controlled loads participating in AGC of a power grid. Background technique [0002] As an important indicator of the safe and stable operation of the power grid, the frequency reflects the active power balance between the system's power generation and load demand. The automatic generation control method is a frequency control method commonly used in power systems at present. With the access of a large number of random and fluctuating renewable energy sources such as wind power and photovoltaics, the traditional frequency modulation method, which only relies on the output of frequency modulation units on the power supply side to balance the active power changes of the system, has great limitations in terms of frequency modulation capacity and response ...

AI Technical Summary

Problems solved by technology

The existing auxiliary frequency regulation strategy, on the one hand, is prone to the problem of losing the diversity of loads because only a single type of temperature-controlled load is considered, resulting in system power oscillation; on the other hand, there are few studies on the participation of temperature-controlled loads in secondary frequency regulation of interconnected grids , there is no reasonable and effective control strategy for coordinating traditional frequency regulation units and load side frequency regulation resources

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