Ximu Liu

ORCID: 0000-0001-9224-2215
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About
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Research Areas
  • Smart Grid Energy Management
  • Microgrid Control and Optimization
  • Sensorless Control of Electric Motors
  • Smart Grid Security and Resilience
  • Magnetic Bearings and Levitation Dynamics
  • Control Systems in Engineering
  • Power Systems and Renewable Energy
  • Electric Vehicles and Infrastructure
  • Advanced Battery Technologies Research
  • Iterative Learning Control Systems
  • Electric Motor Design and Analysis
  • Integrated Energy Systems Optimization
  • Advanced DC-DC Converters
  • Electric Power System Optimization
  • Electric and Hybrid Vehicle Technologies
  • Energy Load and Power Forecasting

Southeast University
2023-2025

Shihezi University
2021-2022

Northeast Electric Power University
2020

Optimal energy scheduling is an essential part for microgrid to obtain higher efficiency no matter from technology or economy. However, the flexibility and reconfigurability of dispatching strategies could not be achieved as structurally complexity increases. To resolve this issue, a novel hierarchical model Colored Petri Net (CPN) based dynamic scheme first proposed class wind-photovoltaic-storage microgrid, which can better monitored top flow information thus facilitates management....

10.1016/j.seta.2022.102670 article EN cc-by Sustainable Energy Technologies and Assessments 2022-09-20

As a part of the global decarbonization agenda, electrification transport sector involving large-scale integration electric vehicles (EV) constitutes one key initiatives. However, potential EV cannot be exploited without appropriate incentive and coordination. Deep reinforcement learning (DRL) well-suited model-free data-driven framework to coordinate EV's charging decisions. Its real-world application facing multiple uncertainties is still challenging, due limited interaction efficiency...

10.1109/tpwrs.2025.3528000 article EN IEEE Transactions on Power Systems 2025-01-01

The problem of integral saturation greatly restricts the engineering application PID controller in AC speed regulator systems, which also affects control performance sensorless drive system with phase-locked loop (PLL) structure. To address this, this paper proposes a novel variable-proportion desaturation PI (VPDPI) method for permanent magnet synchronous motor (PMSM) system. Firstly, an overall scheme sliding mode observer (SMO)-PLL is presented, includes equivalent mathematical model and...

10.3390/app12189234 article EN cc-by Applied Sciences 2022-09-15

This paper develops a novel switching variable proportional desaturation integral (SVPDPI) regulator for speed control of switched reluctance motor (SRM) drive system. Firstly, the idea is adopted in SRM system order to eliminate saturation phenomenon traditional (PI) regulator. Secondly, PI (VPDPI) proposed enhance response by introducing concept proportion. In addition, improve smoothness start-up speed, further designed based on VPDPI Finally, principle error threshold segmentation...

10.1109/access.2021.3078194 article EN cc-by IEEE Access 2021-01-01

The effectiveness of energy management systems is a great concern for wind–photovoltaic-storage electric vehicle systems, which coordinate operation optimization and flexible scheduling with the power grid. In order to save system cost reduce waste caused by wind light abandonment, time-sharing strategy based on state charge (SOC) equipment proposed, quantum mayfly algorithm (QMA) innovatively designed implement strategy. Firstly, produced according SOC battery (EV), as well output...

10.3390/app12178778 article EN cc-by Applied Sciences 2022-08-31

An energy hub (EH) provides an effective solution to the management of local integrated systems (IES), supporting optimal dispatch and mutual conversion distributed resources (DER) in multi-energy forms. However, intrinsic stochasticity renewable generation intensifies fluctuations system’s production when into large-scale grids increases peak-to-valley differences grid integration, leading a significant reduction stability power grid. A privacy-preserving scheduling method based on...

10.3390/electronics12234763 article EN Electronics 2023-11-24

The sensorless control methods in terms of the traditional sliding mode observer (SMO) will usually produce a large number high frequency harmonics and integral saturation problems, which lead to deviation estimated speed drive system poor dynamic performance. Hence, novel variable proportional desaturation (VPDPI) regulator design method based on SMO with phase-locked loop (PLL) is proposed this paper. Firstly, PLL-SMO observation designed by self-closed-loop phase angle prediction, greatly...

10.1109/peas53589.2021.9628730 article EN 2021 IEEE 1st International Power Electronics and Application Symposium (PEAS) 2021-11-13

Abstract Improving the electric power quality of Uninterruptible Power Supply (UPS) is an important part ensuring reliability system. In order to optimize output voltage waveform UPS, a filtering branch can be added existing UPS inverter circuit. This paper studies circuit control problem after adding RLC filter in Through analysis directly considering branch, system state function constructed. A double closed-loop PI strategy designed circuit, and effectiveness method verified by...

10.1088/1742-6596/1626/1/012003 article EN Journal of Physics Conference Series 2020-10-01
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