张志｜东莞理工学院｜学者主页

2026

An improved droop control method for enhanced SOC balancing in DC microgrids

Zhi Zhang, Anan Zhu, Wang Hu, Yonkai Zhong

Energy Reports

DOI

2025

Three-phase Four-wire Photovoltaic Grid Connected Inverter Based on Repetitive Control

Zhong Yongkai, Zhi Zhang, Zhu Anan

International Conference on Smart Grid and Clean Energy Technologies

DOI

2025

Adaptive Virtual Droop Control for Parallel-Connected Bidirectional Converters in DC Microgrids

Anan Zhu, Zhi Zhang, Yonkai Zhong

International Conference on Smart Grid and Clean Energy Technologies

DOI

2025

Modified Three-Phase Isolated Swiss-Type Rectifier with Lower Number of Switching Devices

Wang Hu, Xiao Bing Tang, Zhiping Wang, Zhi Zhang

International Conference on Power and Energy Technology (ICPET)

DOI

2024

A Simplified Switch Short-Circuit Fault-Tolerant Scheme for Three-Phase Six-Switch Current Source Rectifier

Wang Hu, Zhiping Wang, Xiao Bing Tang, Zhaoyun Zhang, Zhi Zhang

IEEE Transactions on Power Electronics

DOI

2024

Three-phase three-level boost inverter with self-balanced capacitor voltage

Bihua Hu, Yan Han, Zhi Zhang, Jinqing Linghu, Yuqing Liao, Xiafei Long

Journal of Power Electronics

DOI

2024

Triple two-level inverter with high DC-voltage conversion ratio and capacitor voltage self-balancing

Bihua Hu, Mengzhou Zhang, Bumin Meng, Zhi Zhang, Jinqing Linghu, Huabing Rao

Journal of Power Electronics

DOI

2023

弱电网下三相电压源型逆变器并网谐振抑制及畸变电网情况下并网电流改善控制策略研究

钟草茂，张志，李义云

《东莞理工学院学报》

2023

非理想电网下三相电压源型逆变器谐振抑制和并网电流改善控制策略综述

李义云，张志，陈浩辉

《东莞理工学院学报》

2023

Study of Control Strategies for Grid-connected Current Improvement Under Distorted Grid Conditions Based on Virtual Impedance

Caomao Zhong, Zhi Zhang, Benxin Liang, Anan Zhu

International Conference on Electrical Machines and Systems (ICEMS)

DOI

2023

Resonance suppression and quality improvement control strategy for a three-phase grid-connected voltage-source inverter under weak grid conditions

Zhi Zhang, Zhi Zhang, Yiyun Li, Caomao Zhong, Zhaoyun Zhang, Zhaoyun Zhang

Frontiers in Energy Research

DOI

2023

Three-level boost inverter with capacitor voltage self-balancing and high conversion efficiency for low DC voltage systems

Bihua Hu, Zhaohong Tang, Zhi Zhang, Jinqing Linghu, Jihong Qian, Xiangyun Qin, Bumin Meng, Rong Gang Han

Journal of Power Electronics

DOI

2023

An Adaptive Virtual Impedance Method for Grid-Connected Current Quality Improvement of a Single-Phase Virtual Synchronous Generator under Distorted Grid Voltage

Caomao Zhong, Zhi Zhang, Anan Zhu, Benxin Liang

Sensors

DOI

2023

Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids

Zhi Zhang, Zhi Zhang, Sheng Gao, Caomao Zhong, Zhaoyun Zhang, Zhaoyun Zhang

Sensors

DOI

2023

Quasi-Symmetrical SVPWM Scheme Based on General Volt-Second Balance Model for a Three-Phase Isolated AC–DC Matrix Converter

Wang Hu, Yunxiang Xie, Yuanpeng Guan, Zhiping Wang, Zhi Zhang

IEEE Transactions on Power Electronics

DOI

2023

Efficient model predictive current control for the grid-connected quasi-Z-source T-type inverter

Qinghua Liu, Longyun Kang, Xinwei Duan, Yangbo Liu, Zhi Zhang

IEICE Electronics Express

DOI

2023

An active damping control strategy with improved transient performance for high‐frequency AC power distribution in intelligent vehicles

Hao Zhou, Junfeng Liu, Zhi Zhang, Mingze Ma, Jun Zeng

International Journal of Circuit Theory and Applications

DOI

2023

A Novel Field-Oriented Control Algorithm for Permanent Magnet Synchronous Motors in 60° Coordinate Systems

Xiao Bing Tang, Zhi Zhang, Xueliang Liu, Chang Liu, Ming Jiang, Yue Song

Actuators

DOI

2023

High-precision bus voltage control based on NLESO and TSMC predicted load current and grid voltage differential feedforward

Di Xie, Liangliang Wang, Zhi Zhang, Shoumo Wang, Longyun Kang, Jigang Yao

Frontiers in Energy Research

DOI

2023

A simplified space vector pulse width modulation method for a three‐level four‐leg inverter considering the neutral point potential balance

Zhi Zhang, Zhi Zhang, Haohui Chen, Yiyun Li, Sizhe Chen, Chang Liu, Zhaoyun Zhang, Zhaoyun Zhang

IET Power Electronics

DOI

2022

同步旋转坐标系下的三相四开关整流器控制及调制方法研究

范乾烜，张志，李义云，李世康，任斌

《东莞理工学院学报》

2022

三相四桥臂变流器调制方法综述

郑柳鹏，张志

《东莞理工学院学报》

2022

An improved robust model predictive and repetitive combined control for three-phase four-leg active power filters with fixed switching frequency

Zhi Zhang, Jialin Huang, Xiaogang Wang, Yitao Liu, Chang Liu, Zhaoyun Zhang

Energy Reports

DOI

2022

Photovoltaic Energy Storage System Based on Bidirectional LLC Resonant Converter Control Technology

Di Xie, Liangliang Wang, Zhi Zhang, Shoumo Wang, Longyun Kang, Jigang Yao

Energies

DOI

2022

Model predictive power control for grid-tied inverters under unbalanced and distorted grid conditions

Zhi Zhang, Longyun Kang, Bihua Hu

Energy Reports

DOI

2022

Model predictive power control with Kalman filter for grid‐tied inverter with parameter variation

Xiao Bing Tang, Zhi Zhang, Bihua Hu

IET Power Electronics

DOI

2022

High efficiency step‐up DC–DC converter for grid‐connected photovoltaic microinverter applications

Zhi Zhang, Zhi Zhang, Liupeng Zheng, Zuhong Zhu, Bihua Hu, Xiao Bing Tang, Zhaoyun Zhang, Zhaoyun Zhang

IET Renewable Power Generation

DOI

2021

孤岛微电网VSG功率均分综述

高胜，张志

《东莞理工学院学报》

DOI

2021

The Field-Orientated-Control Algorithm for Permanent Magnet Synchronous Motor in 60° Coordinate System

Xiao Bing Tang, Zhi Zhang, Chang Liu, Min Zhang, Xueliang Liu, Min Jiang, Zhaoyun Zhang

International Conference on Electrical Machines and Systems (ICEMS)

DOI

2021

An Inductor Current Sensorless Control Strategy Based on Modified VSG Method for Single-Phase Microgrid Application With Seamless Transfer Capability

Zhi Zhang, Junkai Wu, Liupeng Zheng, Di Xie, Xiao Tang

Frontiers in Energy Research

DOI

2021

Photovoltaic Off-Grid Inverter and Maximum Power Point Tracking Technology

Na Yao, Zhi Zhang, Xiao Bing Tang

Journal of Nanoelectronics and Optoelectronics

DOI

2021

Multi-consecutive-samples based frequency estimation for single-phase systems under odd-, even-order harmonics and DC offsets

Zhi Zhang, Mingdi Fan, Zhiyong Dai, Juxiang Zhang, Yong Biao Yang, Xiaolei Chen

International Journal of Electrical Power & Energy Systems

DOI

2021

Harmonic Vector Error Analysis Based on Lagrange Interpolation

Zhaoyun Zhang, Qitong Wang, Zhi Zhang

IEEE Access

DOI

2021

A Family of Asymmetrical SVPWM Schemes with Normal and Open-Circuit Fault-Tolerant Operation Capability for a Three-Phase Isolated AC-DC Matrix Converter

Wang Hu, Yunxiang Xie, Zhiping Wang, Zhi Zhang, Yuanpeng Guan

IEEE Transactions on Power Electronics

DOI

2020

虚拟同步发电机技术综述

吴军凯，张志，朱祖宏，刘畅，唐校，张兆云

《东莞理工学院学报》

DOI

2020

“以赛促教，以赛促学”促进应用型人才培养的探索与实践——以“电力电子技术”课程为例

张志，姚娜，唐校，张兆云，王志平，康丽

《东莞理工学院学报》

DOI

2020

A High Performance of Three-phase Electrolytic Capacitor-Less LC-Type Grid-connected Inverter System with Multiple PV Arrays

Zhi Zhang, Zuhong Zhu, Jukai Wu, Zhaoyun Zhang, Xiao Bing Tang, Chang Liu

International Conference on Electrical Machines and Systems (ICEMS)

DOI

2020

Analysis and Design of a Modified Virtual Synchronous Generator Control Strategy for Single-phase Inverter Application

Zhi Zhang, Junkai Wu, Zuhong Zhu, Zhaoyun Zhang

International Conference on Electrical Machines and Systems (ICEMS)

DOI

2020

Model predictive DC-component power control for grid-connected inverters under unbalanced network

Bihua Hu, Zhiyong Chen, Zhi Zhang, Wenlang Deng, Dongdong Zhao

Journal of Power Electronics

DOI

2020

Application of Photovoltaic Off-Grid Inverter in Marine Engineering

Na Yao, Zhi Zhang, Zhaoyun Zhang

Journal of Coastal Research

DOI

2020

Model predictive flexible power control for grid‐connected inverter under unbalanced network

Bihua Hu, Zhiyong Chen, Zhi Zhang, Siyan Liu, Wenlang Deng

IET Power Electronics

DOI

2020

A Novel Three-Phase Current Source Rectifier Based on an Asymmetrical Structure to Reduce Stress on Semiconductor Devices

Wang Hu, Yunxiang Xie, Zhiping Wang, Zhi Zhang

Energies

DOI

2020

Uniform carrier‐based PWM method for three‐phase three‐level three‐wire and four‐wire converter system with neutral‐point balancing

Zhi Zhang, Zuhong Zhu, Bihua Hu, Xiao Bing Tang, Chang Liu, Zhiping Wang

IET Power Electronics

DOI

2020

A Novel Volt-Second Self-Balancing SVPWM Scheme to Eliminate Steady-State DC Bias for a Three-Phase Isolated AC–DC Matrix Converter

Wang Hu, Yunxiang Xie, Yuanpeng Guan, Zhiping Wang, Zhi Zhang, Jiaxin Xu

IEEE Transactions on Power Electronics

DOI

2020

Analysis and Design of a Single-Stage Bridgeless Isolated AC-DC Resonant Converter for Programmable AC Power Source Applications

Zhi Zhang, Junkai Wu, Liwei Meng, Zhaoyun Zhang, Xiao Bing Tang, Bihua Hu, Wang Hu

IEEE Access

DOI

2019

基于欧拉-拉格朗日模型的单相PWM整流器无源性控制方法研究

张志，刘畅，唐校，张兆云，康丽

《东莞理工学院学报》

DOI

2019

Model Predictive Power Control With Dual Vectors for Three-Level Inverter

Bihua Hu, Longyun Kang, Jiancai Cheng, Xuan Luo, Zhi Zhang

IEEE Journal of Emerging and Selected Topics in Power Electronics

DOI

2019

Research on a Hybrid Control Method for Three-Phase High-Power Energy Storage Converter

Liwei Meng, Chang Liu, Zhi Zhang, Xiao Bing Tang

International Conference on Mechanical, Control and Computer Engineering (ICMCCE)

DOI

2019

Control and Modulation Method for the Three-Phase Four-Switch Rectifier Based on α-β Stationary Frame

Zhi Zhang, Zhihui Guo, Chengliang Deng

IEEE International Electrical and Energy Conference (CIEEC)

DOI

2019

Control and Modulation Method of a Three-phase Eight-switch Inverter for Two-stage Grid-connected Photovoltaic Systems

Hao Zhou, Zhi Zhang, Zhihui Guo, Zhaoyun Zhang, Zhiping Wang, Chengliang Deng

International Conference on Electrical Machines and Systems (ICEMS)

DOI

2019

Open-circuit Fault Diagnosis for Modular Multilevel Converter Using Wavelet Neural Network

Pu Lin, Zhaoyun Zhang, Zhi Zhang, Kang Li, Xinghua Wang

IEEE Innovative Smart Grid Technologies-Asia

DOI

2019

Fault Analysis of DC-Transformer for DC Distribution grid

Pu Lin, Zhaoyun Zhang, Shuquan Chen, Zhi Zhang, Xinghua Wang

IEEE Innovative Smart Grid Technologies-Asia

DOI

2019

High performance of three-level T-type grid-connected photovoltaic inverter system with three-level boost maximum power point tracking converter

Zhi Zhang, Hao Zhou

Advances in Mechanical Engineering

DOI

2019

A Stator Flux Calculation Method for Permanent Magnet Synchronous Motor in 60° Coordinate System

Xiao Bing Tang, Zhi Zhang, Chang Liu, Caishen Wang, Zhiping Wang

Journal of Physics Conference Series

DOI

2019

Model Predictive Direct Power Control With Fixed Switching Frequency and Computational Amount Reduction

Bihua Hu, Longyun Kang, Junfeng Liu, Jun Zeng, Shubiao Wang, Zhi Zhang

IEEE Journal of Emerging and Selected Topics in Power Electronics

DOI

2019

Integrated dead‐time compensation and elimination approach for model predictive power control with fixed switching frequency

Bihua Hu, Longyun Kang, Jiancai Cheng, Jinqing Linghu, Zhi Zhang

IET Power Electronics

DOI

2019

Coordination control of hybrid AC/DC microgrid

Beiming Liang, Kang Li, Jianzong He, Fenglei Zheng, Yunfeng Xia, Zhaoyun Zhang, Zhi Zhang, Guozhong Liu, Yang Zhao

The Journal of Engineering

DOI

2019

Application of micro‐grid control system in smart park

Zhaoyun Zhang, Zhao Wenjun, Yang Mei, Kang Li, Zhi Zhang, Yang Zhao, Guozhong Liu, Na Yao

The Journal of Engineering

DOI

2019

Double‐step model predictive direct power control with delay compensation for three‐level converter

Bihua Hu, Longyun Kang, Jiancai Cheng, Zhi Zhang, Jianbin Zhang, Xuan Luo

IET Power Electronics

DOI

2019

Research on voltage stability and optimal operation of DC microgrid

Shuquan Chen, Zhaoyun Zhang, Zhi Zhang, Tianli Li

Renewable Power Generation Conference (RPG)

DOI

2018

A Flicker-Free High Power Factor Isolated LED Driver

Zhi Zhang, Hao Zhou, Li Kang, Zhaoyun Zhang, Bin Shi Ren, Ming Jiang

Chinese Control and Decision Conference (CCDC)

DOI

2018

Simulation analysis of grid-connected AC/DC hybrid microgrid

Beiming Liang, Li Kang, Zhaoyun Zhang, HU Bi-wu, Yang Zhao, Guozhong Liu, Zhi Zhang, Na Yao

IEEE Conference on Industrial Electronics and Applications (ICIEA)

DOI

2018

Multiloop interleaved control for three-level buck converter in solar charging applications

Zhi Zhang, Hao Zhou, Chengliang Deng, Qinghua Song

IEICE Electronics Express

DOI

2018

A single-stage bridgeless ZVS AC/DC converter for power-factor-correction applications

Zhi Zhang, Hao Zhou, Chang Liu

IEICE Electronics Express

DOI

2017

项目驱动型教学模式在《控制电机》课程教学中的应用

姚娜，张志，康丽

《东莞理工学院学报》

2017

Two‐stage carrier‐based PWM to mitigate neutral point potential oscillation in three‐level inverters

Yuan Yao, Longyun Kang, Zhi Zhang, Yuanbin Feng

Electronics Letters

DOI

2017

A new PWM method for cascade H-bridge three-level rectifier

Zhi Zhang, Liu Xueliang, Hao Zhou, Xiao Bing Tang, Chang Liu, Kang Longyun

Chinese Control and Decision Conference (CCDC)

DOI

2017

A single stage soft-switched AC/DC power factor corrected converter with galvanic isolation

Zhi Zhang, Xueliang Liu, Zhiping Wang

IEICE Electronics Express

DOI

2016

一种级联H桥三电平整流器脉宽调制方法研究

张志，刘畅，唐校，康丽

《东莞理工学院学报》

2016

A high efficiency flyback inverter with repetitive control technique for photovoltaic power system

Zhi Zhang, Xiao Bing Tang, Li Kang, Lei Yang, Longyun Kang

2016

Sliding mode and feedback linearization control of three-phase voltage source PWM converter

Zhi Zhang, Xueliang Liu, Chang Liu, Ming Jiang, Lei Yang

Chinese Control Conference (CCC)

DOI

2016

High-performance three-phase high-power three-level rectifier using DSP-based digital control technique

Zhi Zhang, Xueliang Liu, Ming Jiang, Yuan Yao

World Congress on Intelligent Control and Automation

DOI

2016

Transformerless three-phase T-type three-level inverter for medium-power photovoltaic systems

Zhi Zhang, Ming Jiang, Yuan Yao, Longyun Kang

DOI

2016

Nonlinear control of three-phase voltage source PWM converter

Zhi Zhang, Liu Xueliang, Ming Jiang, Chang Liu

Chinese Control and Decision Conference (CCDC)

DOI

2016

A high-performance digital controller for high-power three-phase UPS by using one DSP

Zhi Zhang, Chang Liu, Yuan Yao, Longyun Kang

DOI

2015

A passivity-based power control for a three-phase three-level NPC rectifier

Zhi Zhang, Xueliang Liu, Caishen Wang, Kang Li, Huazhu Liu

International Conference on Electrical Machines and Systems (ICEMS)

DOI

精选作品

期刊论文

An improved droop control method for enhanced SOC balancing in DC microgrids

Three-phase Four-wire Photovoltaic Grid Connected Inverter Based on Repetitive Control

Adaptive Virtual Droop Control for Parallel-Connected Bidirectional Converters in DC Microgrids

Modified Three-Phase Isolated Swiss-Type Rectifier with Lower Number of Switching Devices

A Simplified Switch Short-Circuit Fault-Tolerant Scheme for Three-Phase Six-Switch Current Source Rectifier

Three-phase three-level boost inverter with self-balanced capacitor voltage

Triple two-level inverter with high DC-voltage conversion ratio and capacitor voltage self-balancing

弱电网下三相电压源型逆变器并网谐振抑制及畸变电网情况下并网电流改善控制策略研究

非理想电网下三相电压源型逆变器谐振抑制和并网电流改善控制策略综述

Study of Control Strategies for Grid-connected Current Improvement Under Distorted Grid Conditions Based on Virtual Impedance

Resonance suppression and quality improvement control strategy for a three-phase grid-connected voltage-source inverter under weak grid conditions

Three-level boost inverter with capacitor voltage self-balancing and high conversion efficiency for low DC voltage systems

An Adaptive Virtual Impedance Method for Grid-Connected Current Quality Improvement of a Single-Phase Virtual Synchronous Generator under Distorted Grid Voltage

Accurate Active and Reactive Power Sharing Based on a Modified Droop Control Method for Islanded Microgrids

Quasi-Symmetrical SVPWM Scheme Based on General Volt-Second Balance Model for a Three-Phase Isolated AC–DC Matrix Converter

Efficient model predictive current control for the grid-connected quasi-Z-source T-type inverter

An active damping control strategy with improved transient performance for high‐frequency AC power distribution in intelligent vehicles

A Novel Field-Oriented Control Algorithm for Permanent Magnet Synchronous Motors in 60° Coordinate Systems

High-precision bus voltage control based on NLESO and TSMC predicted load current and grid voltage differential feedforward

A simplified space vector pulse width modulation method for a three‐level four‐leg inverter considering the neutral point potential balance

同步旋转坐标系下的三相四开关整流器控制及调制方法研究

三相四桥臂变流器调制方法综述

An improved robust model predictive and repetitive combined control for three-phase four-leg active power filters with fixed switching frequency

Photovoltaic Energy Storage System Based on Bidirectional LLC Resonant Converter Control Technology

Model predictive power control for grid-tied inverters under unbalanced and distorted grid conditions

Model predictive power control with Kalman filter for grid‐tied inverter with parameter variation

High efficiency step‐up DC–DC converter for grid‐connected photovoltaic microinverter applications

孤岛微电网VSG功率均分综述

The Field-Orientated-Control Algorithm for Permanent Magnet Synchronous Motor in 60° Coordinate System

An Inductor Current Sensorless Control Strategy Based on Modified VSG Method for Single-Phase Microgrid Application With Seamless Transfer Capability

Photovoltaic Off-Grid Inverter and Maximum Power Point Tracking Technology

Multi-consecutive-samples based frequency estimation for single-phase systems under odd-, even-order harmonics and DC offsets

Harmonic Vector Error Analysis Based on Lagrange Interpolation

A Family of Asymmetrical SVPWM Schemes with Normal and Open-Circuit Fault-Tolerant Operation Capability for a Three-Phase Isolated AC-DC Matrix Converter

虚拟同步发电机技术综述

“以赛促教，以赛促学”促进应用型人才培养的探索与实践——以“电力电子技术”课程为例

A High Performance of Three-phase Electrolytic Capacitor-Less LC-Type Grid-connected Inverter System with Multiple PV Arrays

Analysis and Design of a Modified Virtual Synchronous Generator Control Strategy for Single-phase Inverter Application

Model predictive DC-component power control for grid-connected inverters under unbalanced network

Application of Photovoltaic Off-Grid Inverter in Marine Engineering

Model predictive flexible power control for grid‐connected inverter under unbalanced network

A Novel Three-Phase Current Source Rectifier Based on an Asymmetrical Structure to Reduce Stress on Semiconductor Devices

Uniform carrier‐based PWM method for three‐phase three‐level three‐wire and four‐wire converter system with neutral‐point balancing

A Novel Volt-Second Self-Balancing SVPWM Scheme to Eliminate Steady-State DC Bias for a Three-Phase Isolated AC–DC Matrix Converter

Analysis and Design of a Single-Stage Bridgeless Isolated AC-DC Resonant Converter for Programmable AC Power Source Applications

基于欧拉-拉格朗日模型的单相PWM整流器无源性控制方法研究

Model Predictive Power Control With Dual Vectors for Three-Level Inverter

Research on a Hybrid Control Method for Three-Phase High-Power Energy Storage Converter

Control and Modulation Method for the Three-Phase Four-Switch Rectifier Based on α-β Stationary Frame

Control and Modulation Method of a Three-phase Eight-switch Inverter for Two-stage Grid-connected Photovoltaic Systems

Open-circuit Fault Diagnosis for Modular Multilevel Converter Using Wavelet Neural Network

Fault Analysis of DC-Transformer for DC Distribution grid

High performance of three-level T-type grid-connected photovoltaic inverter system with three-level boost maximum power point tracking converter

A Stator Flux Calculation Method for Permanent Magnet Synchronous Motor in 60° Coordinate System

Model Predictive Direct Power Control With Fixed Switching Frequency and Computational Amount Reduction

Integrated dead‐time compensation and elimination approach for model predictive power control with fixed switching frequency

Coordination control of hybrid AC/DC microgrid

Application of micro‐grid control system in smart park

Double‐step model predictive direct power control with delay compensation for three‐level converter

Research on voltage stability and optimal operation of DC microgrid

A Flicker-Free High Power Factor Isolated LED Driver

Simulation analysis of grid-connected AC/DC hybrid microgrid

Multiloop interleaved control for three-level buck converter in solar charging applications

A single-stage bridgeless ZVS AC/DC converter for power-factor-correction applications

项目驱动型教学模式在《控制电机》课程教学中的应用

Two‐stage carrier‐based PWM to mitigate neutral point potential oscillation in three‐level inverters

A new PWM method for cascade H-bridge three-level rectifier

A single stage soft-switched AC/DC power factor corrected converter with galvanic isolation

一种级联H桥三电平整流器脉宽调制方法研究

A high efficiency flyback inverter with repetitive control technique for photovoltaic power system

Sliding mode and feedback linearization control of three-phase voltage source PWM converter

High-performance three-phase high-power three-level rectifier using DSP-based digital control technique

Transformerless three-phase T-type three-level inverter for medium-power photovoltaic systems

Nonlinear control of three-phase voltage source PWM converter

A high-performance digital controller for high-power three-phase UPS by using one DSP

A passivity-based power control for a three-phase three-level NPC rectifier

会议论文

Modulation and Control Strategy of Three-Phase Three-Level Four-Leg NPC Inverter