Frequency Stability Control Strategy for Isolated Power System of Steel Enterprise with Autonomous Power Plant

LIU Haoming1; YAO Shuangchen1; YUAN Xiaohui1; LI Qiang2; LYU Zhenhua2

doi:10.3969/j.issn.1000-7229.2015.12.017

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Electric Power Construction ›› 2015, Vol. 36 ›› Issue (12) : 108-115. DOI: 10.3969/j.issn.1000-7229.2015.12.017

Frequency Stability Control Strategy for Isolated Power System of Steel Enterprise with Autonomous Power Plant

LIU Haoming1, YAO Shuangchen1, YUAN Xiaohui1, LI Qiang2, LYU Zhenhua2

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Abstract

The structural characteristics of power supply system of steel enterprise were introduced, and the models of speed regulation system and loads in autonomous power plant were established, in which the load models included normal load model and shock load model. For the isolated operation mode, an adaptive frequency stability control strategy was proposed to monitor the operation state and frequency of system real-timely, and take appropriate control measures according to the frequency. Through the study on the primary frequency parameters and secondary frequency control of autonomous power plant, the regulation ability of the isolated network to deal with the shock load and other small perturbations was improved. Through the implementation of a reliable under frequency load shedding （UFLS） control, the emergency of serious decline in the frequency caused by large disturbances could be solved effectively. Simulation results show that the proposed control strategy can ensure the frequency stability of the isolated system.

Key words

steel enterprise / autonomous power plant / isolated grid / shock load / frequency stability

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LIU Haoming1, YAO Shuangchen1, YUAN Xiaohui1, LI Qiang2, LYU Zhenhua2. Frequency Stability Control Strategy for Isolated Power System of Steel Enterprise with Autonomous Power Plant[J]. Electric Power Construction. 2015, 36(12): 108-115 https://doi.org/10.3969/j.issn.1000-7229.2015.12.017

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