Pub Date : 2022-12-09DOI: 10.1109/SPIES55999.2022.10082122
Qingxuan Wang, Yunpeng Zhang, Haidong Cao, Qing Bi
A multistep model predictive current control strategy for reducing the switching frequency of inverters is proposed to address the challenges of low energy efficiency of small power induction motors. Based on the discrete mathematical model of the motor drive system, the strategy extends the current trajectory corresponding to each allowable switching sequence employing iterative prediction with quadratic interpolation, and uses average switching frequency within the predicted range as a cost function. In order to acquire the ideal switching vector in real-time, the cost function conducts online rolling optimization. Compared to model predictive direct current control, this method can reduce the average switching frequency of the two-level inverter while enhancing current harmonic performance. The simulation results verify the efficiency of the proposed method.
{"title":"Multistep Model Predictive Control of Induction Motors for Reducing Switching Frequency","authors":"Qingxuan Wang, Yunpeng Zhang, Haidong Cao, Qing Bi","doi":"10.1109/SPIES55999.2022.10082122","DOIUrl":"https://doi.org/10.1109/SPIES55999.2022.10082122","url":null,"abstract":"A multistep model predictive current control strategy for reducing the switching frequency of inverters is proposed to address the challenges of low energy efficiency of small power induction motors. Based on the discrete mathematical model of the motor drive system, the strategy extends the current trajectory corresponding to each allowable switching sequence employing iterative prediction with quadratic interpolation, and uses average switching frequency within the predicted range as a cost function. In order to acquire the ideal switching vector in real-time, the cost function conducts online rolling optimization. Compared to model predictive direct current control, this method can reduce the average switching frequency of the two-level inverter while enhancing current harmonic performance. The simulation results verify the efficiency of the proposed method.","PeriodicalId":412421,"journal":{"name":"2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128108033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/SPIES55999.2022.10082335
Qinglun Pang, Wenying Liu, Zimin Zhu, Yangnan Li, F. Maalouf, L. Lin
In the context of the carbon peaking and carbon neutrality goals, achieving a low-carbon integrated energy system is of great significance to the low-carbon development of the energy industry Based on this, this paper proposes a comprehensive energy carbon emission optimization and multi-energy market trading method with carbon reduction as the goal. Firstly, the carbon emissions of various types of energy in the integrated energy system are analyzed and a model of carbon emissions of various types of energy is established; secondly, this paper proposes a multi-energy market incentive mechanism with carbon reduction as the goal; based on this, a multi-energy market trading model is established to incentivize the low-carbon operation of integrated energy and the model is solved by particle swarm algorithm; finally, the simulation verifies that the proposed method can effectively reduce the Finally, the simulation verifies that the proposed method can effectively reduce the carbon emissions of the integrated energy system.
{"title":"A Low-carbon Optimal Dispatch Model of a New Multi-energy Complementary Energy System with the Goal of Carbon Reduction","authors":"Qinglun Pang, Wenying Liu, Zimin Zhu, Yangnan Li, F. Maalouf, L. Lin","doi":"10.1109/SPIES55999.2022.10082335","DOIUrl":"https://doi.org/10.1109/SPIES55999.2022.10082335","url":null,"abstract":"In the context of the carbon peaking and carbon neutrality goals, achieving a low-carbon integrated energy system is of great significance to the low-carbon development of the energy industry Based on this, this paper proposes a comprehensive energy carbon emission optimization and multi-energy market trading method with carbon reduction as the goal. Firstly, the carbon emissions of various types of energy in the integrated energy system are analyzed and a model of carbon emissions of various types of energy is established; secondly, this paper proposes a multi-energy market incentive mechanism with carbon reduction as the goal; based on this, a multi-energy market trading model is established to incentivize the low-carbon operation of integrated energy and the model is solved by particle swarm algorithm; finally, the simulation verifies that the proposed method can effectively reduce the Finally, the simulation verifies that the proposed method can effectively reduce the carbon emissions of the integrated energy system.","PeriodicalId":412421,"journal":{"name":"2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125967844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/SPIES55999.2022.10082444
Huanqi Wang, Chunshui Du, Wenlu Cai, Qianliang Zhao
The cascaded three-level rectifiers contain a large number of switches, which increases the possibility of fault event occurrence. The subsequent effects of fault not only reflect the influence on the output of AC and DC side, but also leave hidden risks for the stable operation of the system. A fault tolerant method based on modulation reconstruction is proposed when the open circuit fault occurs in neutral-point (NP) switches. In this fault-tolerant method, the rectifiers recover from the fault by reconstructing the switching sequences in the fault interval, and the module with the open circuit fault can still transmit most of the power rating under the condition of unbalanced load. The power quality of the AC side is effectively guaranteed when the fault occurs, and ensures the stable operation of the system in case of load imbalance. Finally, the feasibility and correctness of proposed method is verified by simulation results.
{"title":"A Fault-Tolerant Control Method Based on Switching Sequences Reconstruction for Cascaded Three-Level Rectifiers","authors":"Huanqi Wang, Chunshui Du, Wenlu Cai, Qianliang Zhao","doi":"10.1109/SPIES55999.2022.10082444","DOIUrl":"https://doi.org/10.1109/SPIES55999.2022.10082444","url":null,"abstract":"The cascaded three-level rectifiers contain a large number of switches, which increases the possibility of fault event occurrence. The subsequent effects of fault not only reflect the influence on the output of AC and DC side, but also leave hidden risks for the stable operation of the system. A fault tolerant method based on modulation reconstruction is proposed when the open circuit fault occurs in neutral-point (NP) switches. In this fault-tolerant method, the rectifiers recover from the fault by reconstructing the switching sequences in the fault interval, and the module with the open circuit fault can still transmit most of the power rating under the condition of unbalanced load. The power quality of the AC side is effectively guaranteed when the fault occurs, and ensures the stable operation of the system in case of load imbalance. Finally, the feasibility and correctness of proposed method is verified by simulation results.","PeriodicalId":412421,"journal":{"name":"2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127987819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Since the cyber and physical layers in the distribution system are deeply integrated, the traditional distribution system has gradually developed into the cyber-physical distribution system (CPDS), and the failures of the cyber layer will affect the reliable and safe operation of the whole distribution system. Therefore, this paper proposes an CPDS planning method considering the reliability of the cyber-physical system. First, the reliability evaluation model of CPDS is proposed. Specifically, the functional reliability model of the cyber layer is introduced, based on which the physical equipment reliability model is further investigated. Second, an optimal planning model of CPDS considering cyber-physical random failures is developed, which is solved using the Monte Carlo Simulation technique. The proposed model is tested on the modified IEEE 33-node distribution system, and the results demonstrate the effectiveness of the proposed method.
{"title":"An Optimal Planning Model for Cyber-physical Active Distribution System Considering the Reliability Requirements","authors":"Changjian Wang, Chutian Yu, Xunhu Yin, Lijun Zhang, Xiang Yuan, Mingxia Fan","doi":"10.1109/SPIES55999.2022.10082691","DOIUrl":"https://doi.org/10.1109/SPIES55999.2022.10082691","url":null,"abstract":"Since the cyber and physical layers in the distribution system are deeply integrated, the traditional distribution system has gradually developed into the cyber-physical distribution system (CPDS), and the failures of the cyber layer will affect the reliable and safe operation of the whole distribution system. Therefore, this paper proposes an CPDS planning method considering the reliability of the cyber-physical system. First, the reliability evaluation model of CPDS is proposed. Specifically, the functional reliability model of the cyber layer is introduced, based on which the physical equipment reliability model is further investigated. Second, an optimal planning model of CPDS considering cyber-physical random failures is developed, which is solved using the Monte Carlo Simulation technique. The proposed model is tested on the modified IEEE 33-node distribution system, and the results demonstrate the effectiveness of the proposed method.","PeriodicalId":412421,"journal":{"name":"2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115839211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/SPIES55999.2022.10082326
Jia-Xiang Cheng, Hongbin Zhang
In this paper, the event-triggered dynamic output feedback controller for discrete-time switched linear system is addressed. The switching of subsystems during the inter-event interval has always been the focus of researchers’ discussions. Particularly, multiple switching is allowed to happen during an inter-event interval in this paper. To reflect the characteristics of multiple switching during an inter-event interval, the average dwell time approach is adopted in stability analysis. Since the full information of system states can not always be acquired directly, the dynamic output feedback control is taken into consideration. Furthermore, by utilizing a controller-mode-dependent Lyapunov function, we obtain criteria of global exponential stability for switched systems, which are the basis of controller design. At last, we provide a numerical example to prove the validity of the theorem proposed in this paper.
{"title":"New Result on Event-Triggered Dynamic Output Feedback Control for Discrete-Time Switched Systems","authors":"Jia-Xiang Cheng, Hongbin Zhang","doi":"10.1109/SPIES55999.2022.10082326","DOIUrl":"https://doi.org/10.1109/SPIES55999.2022.10082326","url":null,"abstract":"In this paper, the event-triggered dynamic output feedback controller for discrete-time switched linear system is addressed. The switching of subsystems during the inter-event interval has always been the focus of researchers’ discussions. Particularly, multiple switching is allowed to happen during an inter-event interval in this paper. To reflect the characteristics of multiple switching during an inter-event interval, the average dwell time approach is adopted in stability analysis. Since the full information of system states can not always be acquired directly, the dynamic output feedback control is taken into consideration. Furthermore, by utilizing a controller-mode-dependent Lyapunov function, we obtain criteria of global exponential stability for switched systems, which are the basis of controller design. At last, we provide a numerical example to prove the validity of the theorem proposed in this paper.","PeriodicalId":412421,"journal":{"name":"2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130259068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/SPIES55999.2022.10082645
Priyabrata Shaw, M. Alam, Saad Ul Hasan, Y. Siwakoti, D. Dah-Chuan Lu
This paper proposes a dual-input single-output (DISO) step-up dc-dc converter exhibiting high voltage gain for grid-connected applications. The main advantage of the proposed concept is the common ground between input and output ports with a continuous input current profile at both input ports. The operating principle and steady-state analysis are presented in detail. The voltage gain expressions for both inputs are obtained using equivalent circuit analysis. The voltage and current stresses of all components and the design equations for L-C elements are derived. Preliminary simulation results are presented using the LTspice simulator to demonstrate the key operational characteristics of the proposed DISO step-up converter. Finally, the converter operation and analytical studies are verified through sample experimental results captured using a prototype converter.
{"title":"A New Dual-Input Single-Output Step-up DC-DC Converter for Grid-Connected Photovoltaic Applications","authors":"Priyabrata Shaw, M. Alam, Saad Ul Hasan, Y. Siwakoti, D. Dah-Chuan Lu","doi":"10.1109/SPIES55999.2022.10082645","DOIUrl":"https://doi.org/10.1109/SPIES55999.2022.10082645","url":null,"abstract":"This paper proposes a dual-input single-output (DISO) step-up dc-dc converter exhibiting high voltage gain for grid-connected applications. The main advantage of the proposed concept is the common ground between input and output ports with a continuous input current profile at both input ports. The operating principle and steady-state analysis are presented in detail. The voltage gain expressions for both inputs are obtained using equivalent circuit analysis. The voltage and current stresses of all components and the design equations for L-C elements are derived. Preliminary simulation results are presented using the LTspice simulator to demonstrate the key operational characteristics of the proposed DISO step-up converter. Finally, the converter operation and analytical studies are verified through sample experimental results captured using a prototype converter.","PeriodicalId":412421,"journal":{"name":"2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134184718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/SPIES55999.2022.10082633
Yupeng Wei, Xiaoqiang Guo, Zhe Zhang, Lichong Wang, J. Guerrero
Transformerless inverters are used in small and medium power photovoltaic grid-connected systems due to small-size, low-cost and high-efficiency. Transformerless inverters have problems of leakage current and low-voltage gain in applications due to the lack of electrical isolation and boost characteristics of transformers. According to these problems, this paper introduces a gain unit circuit in the front-stage based on the two-stage topology of Boost converter combined with the H-bridge inverter to improve the boost capability. The rear-stage adopts double Buck inverter, which has the ability to prevent the short circuit of the bridge arms and improves the reliability of the system. At the same time, it is ensured that there is no high-frequency component in the parasitic capacitance voltage, and the leakage current is suppressed. In this paper, the operational modes, circuit gain and devices stress of the proposed inverter are analyzed, and the simulation verified the feasibility of the scheme.
{"title":"A High-Voltage Gain Transformerless Grid-Connected Inverter","authors":"Yupeng Wei, Xiaoqiang Guo, Zhe Zhang, Lichong Wang, J. Guerrero","doi":"10.1109/SPIES55999.2022.10082633","DOIUrl":"https://doi.org/10.1109/SPIES55999.2022.10082633","url":null,"abstract":"Transformerless inverters are used in small and medium power photovoltaic grid-connected systems due to small-size, low-cost and high-efficiency. Transformerless inverters have problems of leakage current and low-voltage gain in applications due to the lack of electrical isolation and boost characteristics of transformers. According to these problems, this paper introduces a gain unit circuit in the front-stage based on the two-stage topology of Boost converter combined with the H-bridge inverter to improve the boost capability. The rear-stage adopts double Buck inverter, which has the ability to prevent the short circuit of the bridge arms and improves the reliability of the system. At the same time, it is ensured that there is no high-frequency component in the parasitic capacitance voltage, and the leakage current is suppressed. In this paper, the operational modes, circuit gain and devices stress of the proposed inverter are analyzed, and the simulation verified the feasibility of the scheme.","PeriodicalId":412421,"journal":{"name":"2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134188804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/SPIES55999.2022.10082219
Ziheng Dong, Zeyu Liu, K. Hou, Xiaodan Yu, Qian Xiao
To shift the reliability computational burden from real-time to offline, recent works use a deep learning method for rapid reliability assessment. Most existing data-driven methods are based on training the neural network which is considered a black-box model. In lack of interpretability, it fails to provide convincing information for operating staff. In this regard, this paper proposes an interpretable autoencoder method for reliability assessment. First, a deep network is constructed for rapid calculation of the system reliability, and a weight initialization method is proposed based on feature reconstruction. Thereafter, the model is interpreted based on partial dependence (PD) functions to map relationships between reliability and power injections. Additionally, the Gaussian noise strategy is designed for input features. The proposed method is tested in the RTS-79 system. The partial dependence of reliability can be analyzed with the proposed approach.
{"title":"Fast Reliability Assessment of Power Systems Based on Interpretable Autoencoder","authors":"Ziheng Dong, Zeyu Liu, K. Hou, Xiaodan Yu, Qian Xiao","doi":"10.1109/SPIES55999.2022.10082219","DOIUrl":"https://doi.org/10.1109/SPIES55999.2022.10082219","url":null,"abstract":"To shift the reliability computational burden from real-time to offline, recent works use a deep learning method for rapid reliability assessment. Most existing data-driven methods are based on training the neural network which is considered a black-box model. In lack of interpretability, it fails to provide convincing information for operating staff. In this regard, this paper proposes an interpretable autoencoder method for reliability assessment. First, a deep network is constructed for rapid calculation of the system reliability, and a weight initialization method is proposed based on feature reconstruction. Thereafter, the model is interpreted based on partial dependence (PD) functions to map relationships between reliability and power injections. Additionally, the Gaussian noise strategy is designed for input features. The proposed method is tested in the RTS-79 system. The partial dependence of reliability can be analyzed with the proposed approach.","PeriodicalId":412421,"journal":{"name":"2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134310996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/SPIES55999.2022.10082029
Xiaowen Chen, Qi Li, Tianhong Wang, Wei-rong Chen, A. Ravey, E. Breaz, Fei Gao
The Virtual Synchronous Generator (VSG) adds rotational inertia and damping co-efficient to traditional inverter control, which enhances the anti-interference ability of the microgrid (MG). However, the adding segment negatively impacts the response speed of the system. Hence, a coordinated adaptive control strategy of rotational inertia and damping coefficient for VSG is proposed. Firstly, this paper analyzes the effects of rotational inertia and damping coefficient on the power and frequency of an islanded MG. Secondly, it is analyzed that the deviation and rate of change of angular velocity when the synchronous generator suffers load fluctuations. Based on the above analysis, a coordinated adaptive control strategy of rotational inertia and damping coefficient for VSG is proposed. The strategy recognizes the change of frequency and enables the rotational inertia and damping coefficients to be adaptively adjusted in concert with the frequency changes. It achieves the reduction of frequency overshoot while improving the response speed of the system. Finally, the effectiveness of the presented control strategy has been successfully demonstrated with the simulation results in MATLAB/Simulink.
{"title":"Coordinated Adaptive Control Strategy of Rotational Inertia and Damping Coefficient for Virtual Synchronous Generator","authors":"Xiaowen Chen, Qi Li, Tianhong Wang, Wei-rong Chen, A. Ravey, E. Breaz, Fei Gao","doi":"10.1109/SPIES55999.2022.10082029","DOIUrl":"https://doi.org/10.1109/SPIES55999.2022.10082029","url":null,"abstract":"The Virtual Synchronous Generator (VSG) adds rotational inertia and damping co-efficient to traditional inverter control, which enhances the anti-interference ability of the microgrid (MG). However, the adding segment negatively impacts the response speed of the system. Hence, a coordinated adaptive control strategy of rotational inertia and damping coefficient for VSG is proposed. Firstly, this paper analyzes the effects of rotational inertia and damping coefficient on the power and frequency of an islanded MG. Secondly, it is analyzed that the deviation and rate of change of angular velocity when the synchronous generator suffers load fluctuations. Based on the above analysis, a coordinated adaptive control strategy of rotational inertia and damping coefficient for VSG is proposed. The strategy recognizes the change of frequency and enables the rotational inertia and damping coefficients to be adaptively adjusted in concert with the frequency changes. It achieves the reduction of frequency overshoot while improving the response speed of the system. Finally, the effectiveness of the presented control strategy has been successfully demonstrated with the simulation results in MATLAB/Simulink.","PeriodicalId":412421,"journal":{"name":"2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131499851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-09DOI: 10.1109/SPIES55999.2022.10082137
Huiqiao Liu, Qian Xiao, Haolin Yu, Sen Tian, Weiliang Wang, Chunyu Tian, Yunfei Mu, H. Jia
To improve the state of charge (SoC) balancing speed of each battery pack, a multilayer SoC balancing strategy is proposed for the cascaded H-bridge (CHB)-based battery energy storage system (BESS). Firstly, the negative-sequence current is injected for inter-phase SoC balancing control, and its real-time injection component is analyzed based on instantaneous power analysis. Then, the modulation wave of each H-bridge cell is adjusted for the inner-phase SoC balancing control of each battery pack. Compared with the conventional zero-sequence voltage-based SoC balancing control method, the modulation margin for inner-phase SoC balancing control is increased, and the SoC balancing speed is greatly improved. Finally, verification results indicate that the proposed multilayer SoC balancing control strategy can effectively balance the SoC of each battery pack in the CHB-based BESS.
{"title":"An Improved Multilayer State of Charge Balancing Control Strategy for the Cascaded H-Bridge-Based Battery Energy Storage System","authors":"Huiqiao Liu, Qian Xiao, Haolin Yu, Sen Tian, Weiliang Wang, Chunyu Tian, Yunfei Mu, H. Jia","doi":"10.1109/SPIES55999.2022.10082137","DOIUrl":"https://doi.org/10.1109/SPIES55999.2022.10082137","url":null,"abstract":"To improve the state of charge (SoC) balancing speed of each battery pack, a multilayer SoC balancing strategy is proposed for the cascaded H-bridge (CHB)-based battery energy storage system (BESS). Firstly, the negative-sequence current is injected for inter-phase SoC balancing control, and its real-time injection component is analyzed based on instantaneous power analysis. Then, the modulation wave of each H-bridge cell is adjusted for the inner-phase SoC balancing control of each battery pack. Compared with the conventional zero-sequence voltage-based SoC balancing control method, the modulation margin for inner-phase SoC balancing control is increased, and the SoC balancing speed is greatly improved. Finally, verification results indicate that the proposed multilayer SoC balancing control strategy can effectively balance the SoC of each battery pack in the CHB-based BESS.","PeriodicalId":412421,"journal":{"name":"2022 4th International Conference on Smart Power & Internet Energy Systems (SPIES)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131833174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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