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公开(公告)号：US20230046339A1
公开(公告)日：2023-02-16
申请号：US17881125
申请日：2022-08-04
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Jianjian SHEN , Yue WANG , Chuntian CHENG , Lin HU , Qiao SUN
Abstract: The present invention relates to an aggregation method for dispatching the wind and solar power plants. The primary technical solutions include: introducing the power output complementarity indexes to characterize the average effect of the degree of power output complementarity between different power stations, using cohesive hierarchical clustering to identify the optimal cluster division under different division quantities, and introducing the economic efficiency theory to determine the optimal cluster quantity, which avoids the randomness and irrationality that may result from relying on the subjective determination of the number of clusters. According to the analysis of dozens of real-world wind and solar power cluster engineering in the Yunnan Power Grid, the results show that the invention can effectively reduce the number of directly dispatched power stations, and the uncertainty of wind and solar power output can be more accurately described in a cluster manner, presenting better reliability, concentration, and practicality.
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公开(公告)号：US20230048056A1
公开(公告)日：2023-02-16
申请号：US17883126
申请日：2022-08-08
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Jianjian SHEN , Yue WANG , Chuntian CHENG , Lin HU , Xiufeng LI
Abstract: A method for describing power output of a cluster of wind and solar power stations considering time-varying characteristics. The error function is employed to characterize the degree of difference in power output within periods, and split-level clustering is used to determine the optimal period division under different period division quantities. The economic efficiency theory is introduced to determine the ideal number of periods, avoiding the randomness and unreasonableness that may result from relying on the subjective determination of the number of clusters. This method can reasonably divide the wind and solar power output period, fully reflecting the time-varying law of wind and solar power generation. The results also can accurately reflect the distribution characteristics of the power output of the power station group at each time period, and the power output each time period shows better reliability, concentration, and practicality.
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公开(公告)号：US20230268742A1
公开(公告)日：2023-08-24
申请号：US17909594
申请日：2021-10-19
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Jianjian SHEN , Yue WANG , Chuntian CHENG , Binbin ZHOU , Congtong ZHANG , Lin HU
CPC classification number: H02J3/46 , H02J3/381 , H02J2300/24 , H02J2300/28
Abstract: The present invention belongs to the field of power system operations and provides a method for quantifying the flexibility demand and coordinating optimization of a hydro-wind-solar multi-energy complementary system. Firstly, the flexibility demand quantification method considering the uncertainty of wind and solar power output is constructed, and the wind and solar power output interval is divided by using quantile points to generate a set of output scenarios, and then the flexibility demand under each scenario is calculated. Based on the quantitative index of flexibility demand, an optimal operation model of hydro-wind-solar complementary system considering the minimum expectation of system flexibility deficiency is constructed to realize the optimal calculation of hydro-wind-solar complementary. By utilizing an actual wind-hydro complementary system of the Yunnan Power Grid, the model is validated for different new energy access ratios. The results show that the method of the present invention can give a complementary operation and scheduling scheme for multiple types of power sources under different conditions, effectively meet the flexibility demand of the system, reduce the abandoned power and improve the level of clean energy integration.
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