465 citations · 941 across the 11 of their papers we have counts for
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Global Survey of Technologies and Industrial Applications of Grid Forming Energy Storage Systems
Heng Wu, Changjiang Zhan, Jiacheng Li +2
Grid-forming (GFM) energy storage system (ESS) is a key enabler for stabilizing future power systems with high penetration of converter-based resources (CBRs). To get a better over…
Singular Port-Hamiltonian Systems Beyond Passivity
Henrik Sandberg, Kamil Hassan, Heng Wu
In this paper, we investigate a class of port-Hamiltonian systems with singular vector fields. We show that, under suitable conditions, their interconnection with passive systems e…
Impact of Grid-Forming Inverters on Protective Relays: A Perspective for Current Limiting Control Design
Yifei Li, Heng Wu, Xiongfei Wang
Grid-forming (GFM) inverters can significantly alter the fault characteristics of power systems, which challenges the proper function of protective relays. This paper gives a holis…
A Protection-Interoperable Fault Ride-Through Control for Grid-Forming Inverters
Yifei Li, Heng Wu, Xiongfei Wang
Differing from synchronous generators (SGs), grid-forming inverter-based resources (GFM-IBRs) exhibit rapid variations in their output impedances during transmission line faults du…
Analysis of Power Swing Characteristics of Grid-Forming VSC System Considering the Current Limitation Mode
Yongxin Xiong, Heng Wu, Yifei Li +1
This paper investigates power swing characteristics of grid-forming voltage source converter (GFM-VSC) systems considering the current limitation mode in both non-inertial and iner…
Closed-Form Solutions for Grid-Forming Converters: A Design-Oriented Study
Fangzhou Zhao, Tianhua Zhu, Lennart Harnefors +5
This paper derives closed-form solutions for grid-forming converters with power synchronization control (PSC) by subtly simplifying and factorizing the complex closed-loop models.…
Efficacy Analysis of Power Swing Blocking and Out-of-Step Tripping Functions in Grid-Following VSC Systems
Yongxin Xiong, Heng Wu, Xiongfei Wang +1
Power flow oscillations can occur in power systems after major disturbances such as system faults, which may result in significant power swings and even lead to system collapse. Th…
Control of Grid-Forming VSCs: A Perspective of Adaptive Fast/Slow Internal Voltage Source
Heng Wu, Xiongfei Wang
Grid-forming (GFM) capability requirements are increasingly imposed on grid-connected voltage-source converters (VSCs). Under large grid disturbances, GFM-VSCs need to remain stabl…
Stability and Sensitivity Analysis of Multi-Vendor, Multi-Terminal HVDC Systems
Yicheng Liao, Heng Wu, Xiongfei Wang +3
The stability of multi-vendor, multi-terminal HVDC systems can be analyzed in frequency domain by black-box impedance models using the generalized Nyquist stability criterion. Base…
Design-Oriented Transient Stability Analysis of PLL-Synchronized Voltage-Source Converters
Heng Wu, Xiongfei Wang
Differing from synchronous generators, there are lack of physical laws governing the synchronization dynamics of voltage-source converters (VSCs). The widely used phase-locked loop…
Design-Oriented Transient Stability Analysis of Grid-Connected Converters with Power Synchronization Control
Heng Wu, Xiongfei Wang
The power synchronization control (PSC) has been increasingly used with voltage-source converters (VSCs) connected to the weak ac grid. This paper presents an in-depth analysis on…