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13 results on '"Ju, Ping"'

6. Peer-to-Peer Energy Trading Using Prediction Intervals of Renewable Energy Generation

Author

Jia, Yanbo, Wan, Can, Cui, Wenkang, Song, Yonghua, and Ju, Ping

Abstract

The rapid development of renewable energy generation and demand side flexible resource makes the operation of distribution network and the organisation of power market facing greater uncertainty challenges. This paper proposes a novel receding horizon peer-to-peer energy transaction model based on the prediction intervals of renewable energy generation to manage the volatility in the range of a distribution network. A peer-to-peer energy interval matching algorithm is proposed to fully explore the flexibility in demand side for mitigating the output fluctuation of renewable energy generation locally. Then the responsibilities of undertaking the uncertainty risk from renewable generations are assigned to the counter-part consumers who have been matched with the renewable energy generations in a peer-to-peer market. The autonomy energy management problem under distribution network of each consumer is formulated as a cooperative gaming problem using the Nash bargaining theory. The uncertainty risk is considered into the Nash bargaining problem by utilizing voltage chance constraints and conditional value at risk based return-risk utility, of which the quantile connotations are consistent with the quantile results of the probability prediction of renewable energy generations. Moreover, an alternating direction method of multipliers algorithm based distributed methodology is developed to solve the Nash bargaining problem in a distributed manner. Numerical results demonstrate the effectiveness of the presented peer-to-peer energy trading model.

Published
2023
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12. Grid-Synchronization Stability Analysis and Loop Shaping for PLL-Based Power Converters With Different Reactive Power Control.

Author

Huang, Linbin, Xin, Huanhai, Li, Zhiyi, Ju, Ping, Yuan, Hui, Lan, Zhou, and Wang, Zhen

Abstract

Power converters may lose synchronization with the remaining network when integrated in a weak power grid. Such an instability phenomenon [known as grid-synchronization instability (GSI)] features the frequency divergence of phase-locked loop (PLL) and oscillations of the converter’s power output. In this paper, we focus on the influences of reactive power control (RPC) methods on GSI. We develop a single-input–single-output model to explicitly reveal how the PLL interacts with the other parts of the converter system in terms of grid synchronization. Then, after deriving the open-loop transfer function and sensitivity function of the entire converter system, we compare the stability margins for different RPC methods. Furthermore, we elaborate on the interactions among RPC, PLL, and voltage feedforward (VFF), and then demonstrate that different design methods of RPC and VFF will lead to different stability margins. The subsequent stability analysis provides insightful guidelines for coordinating the design of multiple control loops, i.e., RPC, VFF, and PLL. In particular, we demonstrate how the loop shaping of PLL takes effect in increasing the stability margin and eventually preventing the converter from GSI. The validity of the stability analysis is verified through simulations in MATLAB/Simulink. [ABSTRACT FROM AUTHOR]

Published
2020
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