Search Results for author: Qianzhi Zhang

Found 6 papers, 0 papers with code

Data-Driven Affinely Adjustable Robust Volt/VAr Control

no code implementations10 Sep 2022 Naihao Shi, Rui Cheng, LiMing Liu, Zhaoyu Wang, Qianzhi Zhang

Finally, a distributed consensus-based solution, based on the alternating direction method of multipliers (ADMM), for the AARVVC is applied to decide the inverter reactive power adjustment rule with respect to its active power.

Tractable Data Enriched Distributionally Robust Chance-Constrained CVR

no code implementations7 Jul 2022 Qianzhi Zhang, Fankun Bu, Yi Guo, Zhaoyu Wang

To better consider the impacts of load and PV generation uncertainties on CVR implementation in distribution systems and provide less conservative solutions, this paper develops a data-based DRCC-CVR model with tractable reformulation and data enrichment method.

GPR

Online Voltage Control for Unbalanced Distribution Networks Using Projected Newton Method

no code implementations11 Jan 2022 Rui Cheng, Zhaoyu Wang, Yifei Guo, Qianzhi Zhang

It utilizes a non-diagonal symmetric positive definite matrix, developed from the Hessian matrix of the objective, to scale the gradient, and thus a fast convergence performance can be expected in this Newton-like algorithm.

A Two-Level Simulation-Assisted Sequential Distribution System Restoration Model With Frequency Dynamics Constraints

no code implementations16 Jan 2021 Qianzhi Zhang, Zixiao Ma, Yongli Zhu, Zhaoyu Wang

This paper proposes a service restoration model for unbalanced distribution systems and inverter-dominated microgrids (MGs), in which frequency dynamics constraints are developed to optimize the amount of load restoration and guarantee the dynamic performance of system frequency response during the restoration process.

Stochastic Pre-Event Preparation for Enhancing Resilience of Distribution Systems with High DER Penetration

no code implementations24 Dec 2020 Qianzhi Zhang, Zhaoyu Wang, Shanshan Ma, Anmar Arif

This paper proposes a stochastic optimal preparation and resource allocation method for upcoming extreme weather events in distribution systems, which can assist utilities to achieve faster and more efficient post-event restoration.

Scheduling

Distributed Optimal Conservation Voltage Reduction in Integrated Primary-Secondary Distribution Systems

no code implementations9 Nov 2020 Qianzhi Zhang, Yifei Guo, Zhaoyu Wang, Fankun Bu

This paper proposes an asychronous distributed leader-follower control method to achieve conservation voltage reduction (CVR) in three-phase unbalanced distribution systems by optimally scheduling smart inverters of distributed energy resources (DERs).

Scheduling

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