ECONOMIC DISPATCH MODEL FOR WIND/THERMAL SYSTEM BASED ON LOWER ACTIVE POWER LIMIT OF DFIG

Li Shenghu; Chang Yaling; Zhu Zhenggao; Chen Dong

doi:10.19912/j.0254-0096.tynxb.2022-0462

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (7) : 345-351. DOI: 10.19912/j.0254-0096.tynxb.2022-0462

ECONOMIC DISPATCH MODEL FOR WIND/THERMAL SYSTEM BASED ON LOWER ACTIVE POWER LIMIT OF DFIG

Li Shenghu^1,2, Chang Yaling^1,2, Zhu Zhenggao^1,2, Chen Dong^1,2

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Abstract

To solve the problem of the insufficient units of the integrated thermal generators and the power reserve of the system under the large-scale wind power access grid scenario, an economic dispatch model for the wind/thermal system with the downward dispatch capability to the doubly-fed induction generators （DFIGs） is proposed in this paper. Firstly, by including the operation cost, start cost, life loss of the thermal units, and the curtailment cost of the wind power, an economic dispatch model for the wind/thermal system is established. Secondly, since the capacity of rotorside converter （RSC） restricts the lower active power limit of DFIG with high wind speed, an analytical solution to the lower active power limit of DFIG considering the constraint to the RSC’s capacity is proposed, then the economic dispatch model with the lower limit is proposed for the wind/thermal system. Finally, the IEEE-30 node arithmetic results show that the proposed economic dispatch model reduces the operation cost of thermal power and curtailment for wind power.

Key words

wind turbines / wind power / power generation dispatch / thermal generator / deep peak regulation / lower active power limit

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Li Shenghu, Chang Yaling, Zhu Zhenggao, Chen Dong. ECONOMIC DISPATCH MODEL FOR WIND/THERMAL SYSTEM BASED ON LOWER ACTIVE POWER LIMIT OF DFIG[J]. Acta Energiae Solaris Sinica. 2023, 44(7): 345-351 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0462

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