default author photo

Ziwen Zhao

Northwest Agricultural and Forestry University

Yangling, Shaanxi 712100

China

  • Northwest Agricultural and Forestry University

SCHOLARLY PAPERS

8

DOWNLOADS

271

TOTAL CITATIONS

4

Scholarly Papers (8)

Actions:
Email selected abstracts
1.

Stability and Efficiency Performance of Pumped Hydro Energy Storage System for Higher Flexibility

Number of pages: 19 Posted: 07 Sep 2021
Ziwen Zhao, Yichen Yuan, Jianan Wang, Mònica Egusquiza, Eduard Egusquiza, Beibei Xu and Diyi Chen
Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University, Polytechnic University of Catalonia (UPC), Polytechnic University of Catalonia (UPC), Northwest Agricultural and Forestry University - Institute of Water Resources and Hydropower Research and Northwest Agricultural and Forestry University - Institute of Water Resources and Hydropower Research
Downloads 120 (604,538)
Citation 4

Abstract:

Loading...

pumped hydro energy storage system, flexible operation, stability, energy loss, pump turbine

2.

Comprehensive Evaluation of the Flexibility of Hydro-Wind-Photovoltaic Power Generation System Based on Hierarchical-Entropy Method

Number of pages: 19 Posted: 28 Jun 2024
Renwei Xue, Pengchong Zhao, Meng Zhang, Yuanqiang Gao, Diyi Chen, Jiameng Zhang and Ziwen Zhao
affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Northwest Agricultural and Forestry University - Institute of Water Resources and Hydropower Research, affiliation not provided to SSRN and Northwest Agricultural and Forestry University
Downloads 42 (1,157,785)

Abstract:

Loading...

Keywords: Hydro-wind-photovoltaic Power Generation System, Flexible indicator, Hierarchical Entropy, Weighting Method, Comprehensive evaluation.

3.

A Novel Optimization Framework for Multi-Timescale Operations of Pumped Storage Systems: Balancing Stability and Economy

Number of pages: 28 Posted: 27 Jul 2023
Liuwei Lei, Diyi Chen, Hang Wang, Yu Xiao, Ziwen Zhao, Ye Zhou and Md Apel Mahmud
Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University - Institute of Water Resources and Hydropower Research, Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University, affiliation not provided to SSRN and affiliation not provided to SSRN
Downloads 27 (1,359,097)

Abstract:

Loading...

Pumped storage hydropower system, power regulation, short-term load dispatch, multi-timescale operating characteristics, optimization framework

4.

A reinforcement learning-driven adaptive control parameters tuning method: Enhancing frequency regulation performance of hydropower units under full operating range

Number of pages: 31 Posted: 19 Mar 2026
Huaming Hu, Kai Lv, Xiaoyan Zhang, Liuwei Lei, Xiankun Zhu, Diyi Chen, Beibei Xu, Ziwen Zhao and Sun Xinkang
Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University - Institute of Water Resources and Hydropower Research, Northwest Agricultural and Forestry University - Institute of Water Resources and Hydropower Research, Northwest Agricultural and Forestry University and Northwest Agricultural and Forestry University
Downloads 26 (1,399,036)

Abstract:

Loading...

Hydropower frequency regulation, Regulation performance improvement, Adaptive PID tuning, Full operating range, multi-objective optimization

5.

Unlocking Mid-to-Long-Term Flexibility: Why Seasonal Pumped Storage Outperforms Conventional Pumped Storage in Wind-Solar Dominated Grids

Number of pages: 31 Posted: 01 Jul 2025
Meng Zhang, Peiquan Li, Yaling Yao, Airelanjiang Kanji, Ziwen Zhao, Diyi Chen, Natália De Assis Brasil Weber and Julian David Hunt
affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Northwest Agricultural and Forestry University, affiliation not provided to SSRN, affiliation not provided to SSRN and King Abdullah University of Science and Technology (KAUST)
Downloads 22 (1,448,301)

Abstract:

Loading...

Seasonal pumped storage, Renewable energy fluctuations, Mid-to-long-term flexibility, Entropy-weighted variation coefficient method

6.

Multi-Criteria Decision-Making for Control Strategy Optimization of FSCVSPSUs: A Pathway to Energy Conservation and Transient Stability Improvement

Number of pages: 54 Posted: 03 Mar 2026
zhang liu, Diyi Chen, Ziwen Zhao and Yunpeng Zhang
Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University and Northwest Agricultural and Forestry University
Downloads 12 (1,534,404)

Abstract:

Loading...

Full-size converter variable-speed unit, Multi-objective Optimization, successive load rejection, control strategy optimization, multi-criteria decision-making

7.

Energy Conservation-Oriented Variable-Speed Start-Up Strategy for FSC-VSPSUs: Mitigating Grid Connection Instability in Low-Head Conditions

Number of pages: 40 Posted: 21 Mar 2026
zhang liu, Diyi Chen, Yunpeng Zhang and Ziwen Zhao
Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University and Northwest Agricultural and Forestry University
Downloads 11 (1,534,404)

Abstract:

Loading...

Pumped storage, Variable speed unit, S characteristic area, Variable speed characteristic, Grid synchronization, Full-size converter

8.

Adaptive Coordinated Frequency Regulation Framework and Dynamic Performance Enhancement Mechanisms for Variable-Speed Pumped Storage Units with High-Performance Frequency Support

Number of pages: 45 Posted: 09 Feb 2026
zhang liu, Diyi Chen, Yunpeng Zhang, Tiantian Wang and Ziwen Zhao
Northwest Agricultural and Forestry University, Northwest Agricultural and Forestry University - Institute of Water Resources and Hydropower Research, Northwest Agricultural and Forestry University, affiliation not provided to SSRN and Northwest Agricultural and Forestry University
Downloads 11 (1,541,665)

Abstract:

Loading...

Variable-speed unit, virtual synchronous generator, frequency compensation, inertia support, Primary Frequency Regulation, hydro-electro-mechanical coupling