Distributionally robust optimal dispatching of hydro-thermal-load resources for high penetration of wind system with dynamic power regulation margin

YANG Hongming, LIU Junpeng, LIANG Rui, LIAO Shengtao

Systems Engineering - Theory & Practice ›› 2021, Vol. 41 ›› Issue (9) : 2327-2337.

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Systems Engineering - Theory & Practice ›› 2021, Vol. 41 ›› Issue (9) : 2327-2337. DOI: 10.12011/SETP2020-1690

Distributionally robust optimal dispatching of hydro-thermal-load resources for high penetration of wind system with dynamic power regulation margin

  • YANG Hongming1, LIU Junpeng1, LIANG Rui1, LIAO Shengtao2
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Abstract

The high penetration of wind power generation poses a great challenge to the power system safety dispatching since they're highly volatile and intermittent. In view of the anti-peak regulation characteristics and uncertainty of wind power, a distributional robust optimal dispatching method of hydro-thermal-load resources for high penetration of wind system with dynamic power regulation margin is proposed in this paper. Firstly, the moment uncertainty set of net load (the difference between wind power and load power) fluctuation rate is proposed to describe the randomness of system power change. Then, the dynamic power regulation margin model of the system is established considering the regulation ability of hydropower, thermal power and load power. Secondly, by means of the distributionally robust conditional value at risk (DR-CVaR) which can describe tail probability well, the risk of wind abandonment caused by the insufficient power regulation margin of the system under severe wind conditions is presented. A distributional robust optimal dispatching model is established to minimize the system operating costs, risk costs of wind abandonment and maximize the total dynamic regulation margin. The model is transformed into a semidefinite programming problem by dual optimization theory. The proposed method can effectively improve the permeation level of wind power, ensure economic operation and improve the ability to response the uncertain fluctuations of net load.

Key words

high penetration of wind system / dynamic power regulation margin / distributionally robust optimization / conditional value at risk (CVaR)

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YANG Hongming , LIU Junpeng , LIANG Rui , LIAO Shengtao. Distributionally robust optimal dispatching of hydro-thermal-load resources for high penetration of wind system with dynamic power regulation margin. Systems Engineering - Theory & Practice, 2021, 41(9): 2327-2337 https://doi.org/10.12011/SETP2020-1690

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Funding

National Natural Science Foundation of China (71931003, 72061147004); Research Project of Hunan Provincial Science and Technology Department (2019WK2011, 2019GK5015)
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