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- 저자 : Leijiao Ge (검색결과 3 건)
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Hybrid Evaluation Method for Dispatching Control Level of Smart Distribution Network
Yu‑Qian Wang,Leijiao Ge,Na Zhang 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.6
Smart distribution network (SDN) is an important part of smart grid (SG), and its dispatching control level is closely related to the safety and reliability of power system. In order to comprehensively and systematically evaluate the dispatching and control level of smart distribution network, this paper constructs an evaluation index system based on the considerations of reliability, economy, efectiveness, adaptability and cleanness. Taking into account the disadvantages of subjective weighting methods and the objective weighting methods, this paper puts forward a kind of subjective and objective mixed evaluation method for dispatching control level of SDN. In view of the great infuence of expert opinions of subjective weighting method and the high data dependence of objective weighting method, the binomial coefcient method of subjective weighting is combined with the multi-objective programming method of objective weighting to give weight to each index in the comprehensive evaluation index system of dispatching control level of SDN. Case studies verify the proposed method has great signifcance to the evaluation of the dispatching control level of SDN. It can efectively evaluate the dispatching level of SDN and provide a reference for the improvement of the dispatching control level of SDN.
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Fang Yao,Mingwei Li,Leijiao Ge,Wenlong Liao,Kody Powell 전력전자학회 2023 JOURNAL OF POWER ELECTRONICS Vol.23 No.9
With their simple structure, good characteristics, small size, low weight, high starting torque, and high power density, permanent magnet synchronous motors (PMSM) are widely used in industry and national projects. However, accurate PMSM d–q-axis inductance values cannot be obtained after dynamic decoupling of the d–q-axis voltages of a PMSM under vector control. To tackle this challenge, this paper proposes a two-line-same-phase AC standstill measurement (TLSP-ACSM) method. To verify the effectiveness of the proposed method, both the motor synthetic magnetomotive force and theoretical error of inductance measurement based on the TLSP-ACSM method are analyzed, followed by experiments to demonstrate the effectiveness of TLSP-ACSM. By comparing the proposed method with another measurement method, it is demonstrated that the relative error of the d-axis and q-axis inductance measurements is reduced by about 23% and 21%, respectively. When considering magnetic flux leakage, TLSP-ACSM shows better measurement precision and tracking performance.
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Meng Qinglin,Xu Jing,Ge Leijiao,Wang Zhongguan,Wang Jianxiao,Xu Liang,Tang Zhipeng 대한전기학회 2024 Journal of Electrical Engineering & Technology Vol.19 No.1
Due to the fuctuation of wind power output and the "heat to power" mode in the heating period, the wind abandonment phenomenon in coastal areas in winter is increasingly serious. From the perspective of integrated energy system in coastal areas, this paper frst builds an optimal operation model of integrated energy system in coastal areas with the minimum daily total operating cost and the minimum amount of abandoned wind, and constrains the output condition of the corresponding equipment. Then, the mechanism of the adjustable characteristics of seawater desalination load is analyzed, the adjustment range of seawater desalination load is calculated, and the integrated energy system optimization operation method in coastal areas is designed considering the desalination load. Finally, the winter scene of a coastal area in northern China is taken as an example to conduct simulation verifcation. The results show that the total daily operation cost of the system is reduced by 4.6% and the wind power consumption rate is increased by 2.87% after considering the load regulation efect of seawater desalination, which efectively verifes that the integrated energy system operation strategy designed plays a signifcant role in improving the system operation economy and promoting the consumption of new energy.
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