IEEE Transactions on Power Delivery最新文献_第6页

Effects of Corona Discharge from the Grounding Tip on Charge Evolution of Wall Bushing 接地端电晕放电对壁套电荷演化的影响

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-04-07 DOI: 10.1109/TPWRD.2025.3556924

Zheng Bai;Yuanxiang Zhou;Yunxiao Zhang;Xin Huang;Xiongjie Xie;Taiwei Liu

{"title":"Effects of Corona Discharge from the Grounding Tip on Charge Evolution of Wall Bushing","authors":"Zheng Bai;Yuanxiang Zhou;Yunxiao Zhang;Xin Huang;Xiongjie Xie;Taiwei Liu","doi":"10.1109/TPWRD.2025.3556924","DOIUrl":"10.1109/TPWRD.2025.3556924","url":null,"abstract":"Manufacturers consider that the grounding tip near the wall bushing flange is a potentially important factor in several sheath perforation accidents. Taking a ±100 kV true type SF<sub>6</sub> gas-insulated bushing as a typical wall bushing, this paper tests the impact of the nearby grounding tip on the charge accumulation. Based on the experiment results, we propose the three-dimensional nonlinear conduction model to unravel the charge accumulation process and the three-dimensional corona ion migration model to clarify the corona process. It is concluded that the consumption of gas ions leads to the nonlinear charge relaxation process. When the corona of grounding tip incepts, numerous ions are generated, forming an “overcharge” phenomenon. The electric field at the insulator-sheds interface and the SF<sub>6</sub>-insulator interface increases compared to the normal condition, with non-uniform distribution along the circumferential direction. Material inhomogeneity amplifies electric field distortion and creates insulation weaknesses, making insulation aging more likely and potentially leading to a slowly developing electrical tree breakdown process. The length of the needle tip affects the duration of the corona effect; an excessively long needle tip can cause a sustained corona discharge. This research provides a foundation for bushing accidents analysis and operation reliability improvement.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 3","pages":"1682-1693"},"PeriodicalIF":3.8,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143797686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetic Field Estimation in AC Three-Core Armored Power Cables 交流三芯铠装电力电缆的磁场估计

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-04-03 DOI: 10.1109/TPWRD.2025.3557574

Konstantina Bitsi;Andreas I. Chrysochos;Dimitrios Chatzipetros;Dimitrios Gkitsos

{"title":"Magnetic Field Estimation in AC Three-Core Armored Power Cables","authors":"Konstantina Bitsi;Andreas I. Chrysochos;Dimitrios Chatzipetros;Dimitrios Gkitsos","doi":"10.1109/TPWRD.2025.3557574","DOIUrl":"10.1109/TPWRD.2025.3557574","url":null,"abstract":"The rapid growth of offshore renewable energy projects has led to the increased usage of submarine cables, which are necessary for the power transmission to the mainland. In their majority, these are AC, three-core (3 C) armored power cables. The environmental impact of such cable installations has not been fully evaluated yet, although concerns have been raised about potential harmful consequences on the balance of natural ecosystems due to the emitted magnetic field. The armor existence and the twisted cable geometry make the magnetic field calculations in the vicinity of such cables more challenging than existing analytical methods which only consider straight or helically twisted conductors. Other, existing works account for the cable twisting effects when computing the field produced by AC, 3 C armored cables via numerical methods. A more accurate numerical method, accounting for the field-dependent magnetic permeability, is suggested in the present paper. The problem of magnetic field calculation around the cable is approached also analytically and a sufficiently accurate, faster solution is provided. Both methods are validated against experimental measurements, achieving an agreement better than that cited in the literature. Various design aspects, such as the conductor size, armor magnetic permeability and armor lay length, are also discussed.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 3","pages":"1563-1573"},"PeriodicalIF":3.8,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Differential Protection Method of Stator and Rotor Current With Different Frequencies for Variable Speed Pumped Storage Units 变速抽水蓄能机组定子、转子电流不同频率差动保护方法

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-04-03 DOI: 10.1109/TPWRD.2025.3557905

Jian Qiao;Haoyuan Yu;Yikai Wang;Kai Wang;Xin Yin;Linxu Chen

{"title":"Differential Protection Method of Stator and Rotor Current With Different Frequencies for Variable Speed Pumped Storage Units","authors":"Jian Qiao;Haoyuan Yu;Yikai Wang;Kai Wang;Xin Yin;Linxu Chen","doi":"10.1109/TPWRD.2025.3557905","DOIUrl":"10.1109/TPWRD.2025.3557905","url":null,"abstract":"Rotor winding short-circuit fault (RWSF) is a common fault type of variable speed pumped storage unit (VSPSU). However, the RWSF protection in engineering typically depends on the integrated over-current protection of the AC excitation system, which has poor sensitivity to reflect the RWSF and makes it difficult to fulfill the requirements of safe operation of VSPSU. Inspired by transformer differential protection, a different frequency differential protection method using both stator and rotor phase currents is proposed. In terms of working principle and structure, the stator and rotor windings of the VSPSU are similar to the primary and secondary windings of the transformer, and there are conditions for differential protection. Furthermore, the Clark transformation is used to analyze the characteristic changes of stator and rotor currents after the RWSF. On this basis, the criterion form of different frequency differential protection is constructed based on the trapezoidal area method. Finally, the effectiveness of the proposed method is verified by dynamic simulation experiments.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 3","pages":"1531-1539"},"PeriodicalIF":3.8,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cost-Efficient Hybrid Converter for Large-Scale Offshore Wind Power Transmission 用于大规模海上风电传输的低成本混合变流器

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-04-03 DOI: 10.1109/TPWRD.2025.3557586

Huichen Gan;Huangqing Xiao;Ying Huang;Lidong Zhang

{"title":"Cost-Efficient Hybrid Converter for Large-Scale Offshore Wind Power Transmission","authors":"Huichen Gan;Huangqing Xiao;Ying Huang;Lidong Zhang","doi":"10.1109/TPWRD.2025.3557586","DOIUrl":"10.1109/TPWRD.2025.3557586","url":null,"abstract":"As offshore wind farms increase in scale and distance, it is crucial to identify more economical and reliable converter technologies for far-offshore wind power (OWP) high voltage direct current transmission system. In this paper, a cost-efficient hybrid converter topology is proposed based on the scheme of diode rectifier unit (DRU) and modular multilevel converter (MMC) in parallel. Compared to the DRU and MMC station-parallel scheme, the proposed hybrid converter scheme eliminates the need for the transformer in DRU and ensures that no harmonics pass through the remaining converter transformer. Furthermore, the required sub-module capacitance of the proposed scheme is smaller, which is conducive to lower costs. The mathematical model of the hybrid converter is developed, and based on this model, the working principle, along with the harmonic transfer characteristics is analyzed. An active power coordination control strategy and a harmonic suppression strategy are proposed. The PSCAD/EMTDC results for a 1000 MW-OWP integration system with the hybrid converter verifies the effectiveness of the proposed scheme. Finally, a comparison with existing schemes and a detailed economic analysis are performed to demonstrate the superior advantages of the proposed scheme.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 3","pages":"1621-1633"},"PeriodicalIF":3.8,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Voltage Sag Evaluation in Power Grids Considering the Voltage Support Capabilities of Doubly-Fed Wind Farms During LVRT 考虑双馈风电场LVRT电压保障能力的电网电压暂降评估

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-04-03 DOI: 10.1109/TPWRD.2025.3557874

Yi Zhang;Jiazhong Zhang;Chuandong Li;Jieyu Ou;Wei Zhao;Shuqi Zhang

{"title":"Voltage Sag Evaluation in Power Grids Considering the Voltage Support Capabilities of Doubly-Fed Wind Farms During LVRT","authors":"Yi Zhang;Jiazhong Zhang;Chuandong Li;Jieyu Ou;Wei Zhao;Shuqi Zhang","doi":"10.1109/TPWRD.2025.3557874","DOIUrl":"10.1109/TPWRD.2025.3557874","url":null,"abstract":"This paper introduces how doubly-fed wind farms can compensate for reactive power demands of the grid during low voltage ride through (LVRT) events, thereby providing voltage support. This capability significantly influences the assessment of voltage sag. To address this, this paper proposes a method for assessing voltage sags in the power grid that considers the voltage support capabilities of doubly-fed wind farm during LVRT. This method accurately characterizes the voltage support capability during LVRT by establishing a dynamic equivalent model of the wind farm. For each wind farm, the clustering is based on the Crowbar status determination as the primary clustering criterion, while the interconnected voltage at the point of common coupling (PCC), considering the mutual influence among multiple wind farms, is used as a correction factor for iterative clustering. By utilizing collaborative equivalence of multiple wind farms, the final dynamic equivalent model is determined. Subsequently, a comprehensive simulation of various grid fault scenarios is conducted to evaluate the voltage sag. The proposed method's accuracy and effectiveness have been validated through case studies.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 3","pages":"1540-1553"},"PeriodicalIF":3.8,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comprehensive Full-Scale Converter Wind Park Initialization for Electromagnetic Transient Studies 综合全尺寸变流器风电场初始化电磁瞬变研究

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-04-03 DOI: 10.1109/TPWRD.2025.3551546

Juan Antonio Ocampo-Wilches;Jean Mahseredjian;Keijo Jacobs;Ahda G. Pavani;Haoyan Xue

引用次数: 0

DC Secondary Ripple Suppression Method for HCC-HVDC Under Asymmetric Grid Fault Conditions 非对称电网故障条件下hc - hvdc直流二次纹波抑制方法

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-04-02 DOI: 10.1109/TPWRD.2025.3557433

Lingfeng Deng;Xiaoping Zhou;Lerong Hong

{"title":"DC Secondary Ripple Suppression Method for HCC-HVDC Under Asymmetric Grid Fault Conditions","authors":"Lingfeng Deng;Xiaoping Zhou;Lerong Hong","doi":"10.1109/TPWRD.2025.3557433","DOIUrl":"10.1109/TPWRD.2025.3557433","url":null,"abstract":"The hybrid commutation converter (HCC) based high voltage direct current (HVDC) system features controllable turn-off capability, eliminating commutation failure (CF) caused by single-phase grounding faults in the AC grid. However, under severe asymmetric grid fault conditions, significant voltage and current secondary ripples occur in the DC lines and lead to sending end renewable energy systems destabilizing or even off-grid, posing a serious threat to the stable operation of HVDC systems. To address this issue, this paper first investigates the DC secondary ripple generation mechanism and its transmission process between the sending and receiving ends. It finds that negative-sequence voltage at the receiving end grid is converted into DC voltage ripple by converter modulation, propagating through the DC line and controller to induce fluctuation in the sending end converter bus voltage. Then, a method for suppressing DC secondary ripple for HCC-HVDC is proposed, leveraging the wide-range firing angle adjustment capability of HCC. The method involves actively injecting a double-frequency disturbance signal into the inverter firing angle command. This enables the converter to trigger asymmetrically and introduces a negative-sequence component into the fundamental frequency-switching function. The negative-sequence component couples with the positive-sequence voltage of the AC grid to offset the DC voltage secondary ripple. Finally, a DC secondary ripple suppression controller (DCSRSC) is designed based on the proposed method and embedded in the HVDC control system. The controller dynamically adjusts the inverter's firing angle based on real-time detection of AC negative-sequence voltage, effectively suppressing DC secondary ripple and enhancing the stability of DC power transmission. Hardware-in-the-loop experiments validate the effectiveness of the proposed method.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 3","pages":"1634-1646"},"PeriodicalIF":3.8,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Main Protection Optimization Scheme for Generator Parallel Operation of Rotating Asynchronous Machine in Nuclear Power Plants 核电站旋转异步发电机并联运行主保护优化方案

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-04-02 DOI: 10.1109/TPWRD.2025.3557170

Yikai Wang;Chaozheng Xu;Jian Qiao;Zhihui Dai;Liming Tan;Xianggen Yin

{"title":"Main Protection Optimization Scheme for Generator Parallel Operation of Rotating Asynchronous Machine in Nuclear Power Plants","authors":"Yikai Wang;Chaozheng Xu;Jian Qiao;Zhihui Dai;Liming Tan;Xianggen Yin","doi":"10.1109/TPWRD.2025.3557170","DOIUrl":"10.1109/TPWRD.2025.3557170","url":null,"abstract":"The Rotating Asynchronous Machine (RAM) system of a nuclear power plant provides a stable and reliable power supply for the control rod drive mechanism (CRDM) through two parallel generators. At present, the main protection of the generators in the RAM system is only configured with longitudinal differential protection, which cannot reflect the interturn short circuit fault and interbranch short circuit fault of the stator winding. Based on the characteristics of parallel connection of RAM generators in nuclear power plants, this article proposes a dual-generator split phase transverse differential protection and a dual-generator incomplete longitudinal differential protection. Through the internal fault set of the generator and the internal fault potential splitting model of the generator, the quantitative analysis of different main protection configuration schemes is carried out. It is concluded that the existing longitudinal differential protection and the incomplete longitudinal differential protection of two parallel generators can correctly reflect the vast majority of internal short-circuit faults. Finally, the dynamic experiment is carried out to prove the feasibility of the protection method in the actual unit operation.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 3","pages":"1480-1492"},"PeriodicalIF":3.8,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143775296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A New Approach to Determine Feasible Operating Region of Unbalanced Distribution Networks With Distributed Photovoltaics 分布式光伏不平衡配电网可行运行区域确定的新方法

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-03-27 DOI: 10.1109/TPWRD.2025.3555210

Manorath Prasad;Zakir Hussain Rather;Reza Razzaghi;Suryanarayana Doolla

{"title":"A New Approach to Determine Feasible Operating Region of Unbalanced Distribution Networks With Distributed Photovoltaics","authors":"Manorath Prasad;Zakir Hussain Rather;Reza Razzaghi;Suryanarayana Doolla","doi":"10.1109/TPWRD.2025.3555210","DOIUrl":"10.1109/TPWRD.2025.3555210","url":null,"abstract":"Amidst rising distributed generation and its potential role in grid management, this article presents a new realistic approach to determine the operational space and flexibility potential of an unbalanced active distribution network. The feasible operating region of an active distribution network is constituted by its range of active-reactive power exchanges with the bulk power system without breaching network constraints. This study explores the potential of highly penetrated single- and three-phase distributed photovoltaics and voltage-sensitive loads to determine the feasible operating region at different operating points. The cumulative response of Volt-Var controlled distributed photovoltaics and voltage-sensitive loads determines the power flow at the bulk power system-active distribution network interconnection, ensuring feasibility with respect to voltage magnitude and unbalance constraints. Further, the correspondence of feasible operating region with the tap-settings of substation transformer enables a novel feature to traverse throughout the available operating region and facilitate bulk power system-active distribution network power coordination. Additionally, a nodal sensitivity-based adjustable Volt-Var control scheme is proposed for distributed photovoltaics, improving the feasible operating region. The proposed strategy is validated on bulk power system-active distribution network integrated test system. Bulk power system: IEEE-9 bus system – Active distribution network: (highly unbalanced IEEE-13 bus distribution system (medium voltage) + modified CIGRE low voltage system).","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 3","pages":"1493-1504"},"PeriodicalIF":3.8,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cooperative Control of FFM-CSC Using Positive and Negative Trigger Angle for Offshore Wind Power Transmission 基于正负触发角的FFM-CSC海上风电传输协同控制

IF 3.8 2区工程技术

IEEE Transactions on Power Delivery Pub Date : 2025-03-27 DOI: 10.1109/TPWRD.2025.3555254

Dingteng Feng;Xiaoling Xiong;Chenhao Yao;Zihan Zhou;Chengyong Zhao

{"title":"Cooperative Control of FFM-CSC Using Positive and Negative Trigger Angle for Offshore Wind Power Transmission","authors":"Dingteng Feng;Xiaoling Xiong;Chenhao Yao;Zihan Zhou;Chengyong Zhao","doi":"10.1109/TPWRD.2025.3555254","DOIUrl":"10.1109/TPWRD.2025.3555254","url":null,"abstract":"The current source converter (CSC) is a competitive solution for offshore wind grid integration. The fundamental frequency modulation-based current source converter (FFM-CSC) effectively solves the shortcomings of pulse width modulation CSC (PWM-CSC), in which DC voltage ripple is drastic and electrical stresses are high. The independent control of offshore AC voltage and frequency requires two degrees of control freedom for the converter. Nevertheless, this is not possible for the FFM-CSC since it has single control degree of freedom. To solve this problem, a positive and negative trigger angle cooperative control method is developed for CSC-HVDC connected offshore wind farms. The positive and negative trigger angles of the high and low valves are adopted to stabilize the offshore AC grid and achieve independent control of voltage amplitude and frequency. Next, by exploring the monotonicity of the offshore voltage amplitude and frequency, the laws affecting the control objectives were analyzed. Then, the AC fault characteristics are analyzed, whilst the ride-through methods are investigated accordingly. Finally, experimental prototypes and simulation models are built to confirm the designed control strategy and fault ride-through mechanism.","PeriodicalId":13498,"journal":{"name":"IEEE Transactions on Power Delivery","volume":"40 3","pages":"1574-1586"},"PeriodicalIF":3.8,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0