Leiqi Zhang
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View article: Research on Power Stability of Wind-Solar-PEM Hydrogen Production System Based on Virtual Synchronous Machine Control
Research on Power Stability of Wind-Solar-PEM Hydrogen Production System Based on Virtual Synchronous Machine Control Open
In order to solve the problem of frequency and voltage stability degradation caused by high proportion of renewable energy grid connection, this paper proposes a multi-energy dynamic coordinated control framework, which integrates the iner…
View article: Two-Layer Optimal Capacity Configuration of the Electricity–Hydrogen Coupled Distributed Power Generation System
Two-Layer Optimal Capacity Configuration of the Electricity–Hydrogen Coupled Distributed Power Generation System Open
With the expansion of the scale of high-proportion wind and solar power grid connections, the problems of abandoned wind and solar power and insufficient peak shaving have become increasingly prominent. The electric–hydrogen coupling syste…
View article: Compatible matching and synergy operation optimization of hydrogen-electric hybrid energy storage system in DC microgrid
Compatible matching and synergy operation optimization of hydrogen-electric hybrid energy storage system in DC microgrid Open
Hydrogen energy storage (HES) systems could balanced source-load mismatches in DC microgrids. By combining HES with electrical energy storage (EES), the start-up delay and rapid degradation of HES under fluctuating inputs can be mitigated,…
View article: Hydrogen Leakage Location Prediction in a Fuel Cell System of Skid-Mounted Hydrogen Refueling Stations
Hydrogen Leakage Location Prediction in a Fuel Cell System of Skid-Mounted Hydrogen Refueling Stations Open
Hydrogen safety is a critical issue during the construction and development of the hydrogen energy industry. Hydrogen refueling stations play a pivotal role in the hydrogen energy chain. In the event of an accidental hydrogen leak at a hyd…
View article: Online Optimization to Suppress the Grid-Injected Power Deviation of Wind Farms with Battery-Hydrogen Hybrid Energy Storage Systems
Online Optimization to Suppress the Grid-Injected Power Deviation of Wind Farms with Battery-Hydrogen Hybrid Energy Storage Systems Open
View article: A Risk-Averse Just-In-Time Scheme for Learning-Based Operation of Microgrids with Coupled Electricity-Hydrogen-Ammonia under Uncertainties
A Risk-Averse Just-In-Time Scheme for Learning-Based Operation of Microgrids with Coupled Electricity-Hydrogen-Ammonia under Uncertainties Open
This paper proposes a Risk-Averse Just-In-Time (RAJIT) operation scheme for Ammonia-Hydrogen-based Micro-Grids (AHMGs) to boost electricity-hydrogen-ammonia coupling under uncertainties. First, an off-grid AHMG model is developed, featurin…
View article: Distributed optimization for joint peer‐to‐peer electricity and carbon trading among multi‐energy microgrids considering renewable generation uncertainty
Distributed optimization for joint peer‐to‐peer electricity and carbon trading among multi‐energy microgrids considering renewable generation uncertainty Open
The increasing penetration of renewable energy and the further coupling of the electricity and carbon markets have hindered the realization of efficient and low‐carbon transformation processes in new power systems. This study addresses the…
View article: A bi‐level planning strategy of a hydrogen‐supercapacitor hybrid energy storage system based on APA‐MOHHO
A bi‐level planning strategy of a hydrogen‐supercapacitor hybrid energy storage system based on APA‐MOHHO Open
A bi‐level planning strategy of a hydrogen‐supercapacitor hybrid energy storage system (H‐S HESS) has been proposed in this study for wind power fluctuation suppression. The proposed system consists of a supercapacitor array and a hydrogen…
View article: The Effect of Explosions on the Protective Wall of a Containerized Hydrogen Fuel Cell System
The Effect of Explosions on the Protective Wall of a Containerized Hydrogen Fuel Cell System Open
With the development of hydrogen energy, containerized hydrogen fuel cell systems are being used in distributed energy-supply systems. Hydrogen pipelines and electronic equipment of fuel cell containers can trigger hydrogen-explosion accid…
View article: Multi-time-scale economic scheduling method for electro-hydrogen integrated energy system based on day-ahead long-time-scale and intra-day MPC hierarchical rolling optimization
Multi-time-scale economic scheduling method for electro-hydrogen integrated energy system based on day-ahead long-time-scale and intra-day MPC hierarchical rolling optimization Open
To build a clean, secure, and efficient energy system, the hydrogen energy is an important developing trend for the energy revolution, and electro-hydrogen coupling system is expected to play an important role in the future. To obtain the …
View article: Economic Analysis of Distributed Electricity-Hydrogen Coupling System Operation Models
Economic Analysis of Distributed Electricity-Hydrogen Coupling System Operation Models Open
The selection of a reasonable operating mode for the distributed electric hydrogen coupling system is the key to its sustainable development. Firstly, four operational modes of distributed electric hydrogen coupling system were proposed, n…
View article: Performance Degradation Decomposition-Ensemble Prediction of Pemfc Using Ceemdan and Dual Data-Driven Model
Performance Degradation Decomposition-Ensemble Prediction of Pemfc Using Ceemdan and Dual Data-Driven Model Open
View article: Fast distributed gradient descent method for economic dispatch of microgrids via upper bounds of second derivatives
Fast distributed gradient descent method for economic dispatch of microgrids via upper bounds of second derivatives Open
Distributed optimization algorithms, such as alternating direction method of multipliers (ADMM) and distributed gradient descent method (DGDM), can no longer meet the needs of the application in the large system due to their slow convergen…
View article: Accelerated hierarchical optimization method for emergency energy management of microgrids with energy storage systems
Accelerated hierarchical optimization method for emergency energy management of microgrids with energy storage systems Open
When failures occur in microgrids (MGs), the energy management for emergencies is required. To respond to emergencies in MGs rapidly, an accelerated hierarchical optimization method has been proposed, where the outputs of energy storage sy…
View article: Improved Cycle Aging Cost Model for Battery Energy Storage Systems Considering More Accurate Battery Life Degradation
Improved Cycle Aging Cost Model for Battery Energy Storage Systems Considering More Accurate Battery Life Degradation Open
Battery energy storage systems (BESSs) have been widely used in power grids to improve their flexibility and reliability. However, the inevitable battery life degradation is the main cost in BESS operations. Thus, an accurate estimation of…
View article: Electric vehicle’s impacts on China’s electricity load profiles based on driving patterns and demographics
Electric vehicle’s impacts on China’s electricity load profiles based on driving patterns and demographics Open
View article: Optimal Planning of Electric Vehicle Charging Station Considering Mutual Benefit of Users and Power Grid
Optimal Planning of Electric Vehicle Charging Station Considering Mutual Benefit of Users and Power Grid Open
A reasonable plan for charging stations is critical to the widespread use of electric vehicles. In this paper, we propose an optimal planning method for electric vehicle charging stations. First of all, we put forward a forecasting method …
View article: Parallel and Distributed Optimization Method With Constraint Decomposition for Energy Management of Microgrids
Parallel and Distributed Optimization Method With Constraint Decomposition for Energy Management of Microgrids Open
Energy management in power systems is a thorny optimization problem. With the sizes of systems rising, centralized optimization methods are restricted by their complexities of communications, while distributed optimization methods have eme…
View article: An Improved Droop Control for Balancing State of Charge of Battery Energy Storage Systems in AC Microgrid
An Improved Droop Control for Balancing State of Charge of Battery Energy Storage Systems in AC Microgrid Open
In order to avoid overuse of a certain battery energy storage system (BESS) and prolong the cycle life of battery in AC microgrid, an improved SoC-based droop control based on multi-agent system (MAS) is proposed for achieving State of Cha…
View article: An Improved Droop Control Strategy for Low-Voltage Microgrids Based on Distributed Secondary Power Optimization Control
An Improved Droop Control Strategy for Low-Voltage Microgrids Based on Distributed Secondary Power Optimization Control Open
To achieve accurate reactive power sharing and voltage frequency and amplitude restoration in low-voltage microgrids, a control strategy combining an improved droop control with distributed secondary power optimization control is proposed.…
View article: Generalized-impedance and Stability Criterion for Grid-connected Converters
Generalized-impedance and Stability Criterion for Grid-connected Converters Open
The output impedance matrix of a grid-connected converter plays an important role in analyzing system stability. Due to the dynamics of the DC-link control and the phase locked loop (PLL), the output impedance matrices of the converter and…
View article: A Generalized-Impedance Based Stability Criterion for Three-Phase Grid-Connected Voltage Source Converters
A Generalized-Impedance Based Stability Criterion for Three-Phase Grid-Connected Voltage Source Converters Open
The output impedance matrices of three-phase grid-connected voltage source converters (VSCs) are widely used in power system stability analysis. Regardless of how the impedance is modeled, there always exist coupling terms in the impedance…
View article: An Improved SVM-Based Cognitive Diagnosis Algorithm for Operation States of Distribution Grid
An Improved SVM-Based Cognitive Diagnosis Algorithm for Operation States of Distribution Grid Open
View article: Comparison of the Weibull and the Crow-AMSAA Model in Prediction of Early Cable Joint Failures
Comparison of the Weibull and the Crow-AMSAA Model in Prediction of Early Cable Joint Failures Open
This paper compares the application of the Weibull distribution and the Crow-AMSAA (C-A) model to the analysis of cable joint failures. The procedures on how to use the two models to analyze failure data and to predict the future number of…