CSEE Journal of Power and Energy Systems

Papers
(The median citation count of CSEE Journal of Power and Energy Systems is 1. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-11-01 to 2025-11-01.)
ArticleCitations
Composite braking control strategy of a novel electromechanical-hydraulic coupling driving electric vehicle42
Grid voltage sensor-less protection scheme for one cycle-controlled single-phase photovoltaic inverter systems38
Self-Sustaining of Critical Park Microgrids Integrating Mobile Emergency Generators Subjective to Major Outage36
Voltage Support Capacity Improvement for Wind Farms with Reactive Power Substitution Control36
Physical Mechanism Enabled Neural Network for Power System Dynamic Security Assessment33
High Power Density EV Integrated Fast Battery Chargers Based on the General Torque Cancelation Law for Three-Phase Motors30
Effect of Frequency on Degradation in BOPP Films Under Repetitively Pulsed Voltage28
Integrated Optimization Planning of Multiple Energy Stations for Low Carbon Operation24
Assessment and Enhancement of FRC of Power Systems Considering Thermal Power Dynamic Conditions21
Modeling and Stability Analysis of Meshed Smart Transformer-Fed Grid21
Data-Driven Predictive Voltage Control for Distributed Energy Storage in Active Distribution Networks20
Converters' loading balance and stability verification for doubly-fed induction generator20
Transactive energy and flexibility provision in multi-microgrids using Stackelberg game20
An incidence matrix based analytical method of N-1 contingency parallel analysis of main transformers in distribution networks19
Optimal Distributed Dispatch of Smart Multi-Agent Energy Hubs Based on Consensus Algorithm Considering Lossy Communication Network and Uncertainty19
Protection for HVDC Transmission Lines Based on Current Ratio of DC Filter and Smoothing Reactor19
Ex-Ante and Ex-Post Decomposition Strategy for Ultra-Short-Term Wind Power Prediction17
System Strength Assessment Based on Multi-task Learning17
Improving Operational Flexibility of Integrated Energy Systems Through Operating Conditions Optimization of CHP Units17
High-Power Density Capacitive Coupler for Power Transfer System in Miniaturized Rotary Application16
Data-driven transient stability assessment with sparse PMU sampling and online self-check function15
The On-site Verification of Key Technologies for Kunbei-Liuzhou-Longmen Hybrid Multi-terminal Ultra HVDC Project14
Electricity-Heat-Based Integrated Demand Response Considering Double Auction Energy Market with Multi-Energy Storage for Interconnected Areas13
Transient Stability Analysis of Large-scale Power Systems: A Survey13
Frequency-Voltage Active Support Strategy for Hybrid Wind Farms Based on Grid-Following and Grid-Forming Hierarchical Subgroup Control13
Optimal dispatch with flexible uncertainty set for multi-energy systems: An IGDT based two-stage decision framework12
Robust N-k security-constrained optimal power flow incorporating preventive and corrective generation dispatch to improve power system reliability12
Large-Signal Stability Analysis of a Modular Multilevel Converter Based on Mixed Potential Theory12
Improved Multi-Grained Cascade Forest Model for Transformer Fault Diagnosis12
Impacts of COVID-19 Pandemic on Italian Electricity Demand and Markets12
Control Scheme of Spread Frequency Band for High Power Impedance Measuring Converter with Chirp Signal Injection12
Robust Expansion Planning of Electric Vehicle Charging System and Distribution Networks11
Modeling, Oscillation Analysis and Distributed Stabilization Control of Autonomous PV-based Microgrids11
Review of Treatments for Suppressing Surface Charge Accumulation and Enhancing Surface Flashover Voltage11
Imbalance correction method based on ratio of loss function values for transient stability assessment11
Multi-timescale Energy Sharing with Grid-BESS Capacity Rental Considering Uncertainties10
Improved Discontinuous SVM Based Fault-Tolerant Control of AC/DC Converter for All-DC Offshore Wind Power System10
Synergistic Promotion of Electrical, Mechanical and Thermal Properties for Silicone Rubber-based Field Grading Material via Compound Modification10
Unscented Particle Filter Algorithm Towards Data Quality Improvement in Sustainable Distribution Power Systems10
An Edge Visual Incremental Perception Framework Based on Deep Semi-supervised Learning for Monitoring Power Transmission Lines10
Planning Model for Energy Routers Considering Peer-to-Peer Energy Transactions Among Multiple Distribution Networks10
Compatibility of Eco-Friendly Gas-Insulated Medium HFO-1234ze(E) with Copper and Aluminum10
Coordinated frequency control for isolated power systems with high penetration of DFIG-based wind power10
Reinforcement Learning-Empowered Graph Convolutional Network Framework for Data Integrity Attack Detection in Cyber-Physical Systems10
Optimal configuration of multitype energy storage for integrated energy system considering the system reserve value10
Reliability Assessment for Integrated Power-gas Systems Considering Renewable Energy Uncertainty and Cascading Effects9
Confidence Estimation Transformer for Long-Term Renewable Energy Forecasting in Reinforcement Learning-based Power Grid Dispatching9
Power synchronization of smart transformers allowing universal operation in radial and meshed grids9
Neural Network Based Fea sible Region Approximation Model for Optimal Operation of Integrated Electricity and Heating System9
Hierarchical Robust Expansion Co-planning Model for Multi-Energy Distribution Systems Considering Reconfiguration9
Optimized operation of micro-energy grids considering the shared energy storage systems and balanced profit allocation9
Subsynchronous Oscillation Characteristics for Direct Drive Wind Farm Based on Complex Torque Coefficient Method9
Optimal Time-of-use Pricing for Renewable Energy-powered Microgrids: A Multi-agent Evolutionary Game Theory-based Approach9
Reference-input-based imaginary axis current estimation method for DQ control strategy of single-phase PWM converters8
DG Hosting Capacity Assessment Considering Dependence Among Wind Speed, Solar Radiation, and Load Demands8
Event-based Two-stage Non-intrusive Load Monitoring Method Involving Multi-dimensional Features8
Influence of repetitive impulse waveform on surface discharge characteristics and insulation life for polyimide film8
An Efficient Method to Estimate Admittance of Black-boxed Inverter-based Resources for Varying Operating Points8
Non-convexity Pricing and Allocating Costs in Stochastic Electricity Markets8
Hybrid bidirectional DC/DC converter: Mutual control and stability analysis8
A Delay-dependent Dynamic Wide Area Damping Controller for Renewable Energy Integrated Power System Resilient to Communication Failure8
Reliability Evaluation and Sensitivity Analysis for UHVDC-HC Considering Preventive Maintenance and Inverter Capacity Levels8
Pricing Binary Variables of System-Wide Constraints for Power System Optimization8
Model-Free Optimal Volt-VAR Control of Wind Farm Based on Data-Driven Lift-Dimension Linear Power Flow8
Enhanced Transient Stability Strategy for Grid-Forming Converter Based on Current Limiting8
Skeleton-based violation action recognition method for safety supervision in the operation field of distribution network based on graph convolutional network8
Three-Stage Robust Model for Resilient DERs Planning in Distribution Networks8
Market-based coordination of regional electric and natural gas systems: A peer-to-peer energy trading model7
Battery Storage Configuration of AC/DC Hybrid Distribution Networks7
Surface Potential Characteristics of Polymeric Barriers for a Hybrid Gas-Solid Insulation7
Energy management of solid oxide fuel cell/lithium battery hybrid system7
Blockchain-Enabled Robust-Game Electricity Transaction Model for a Multi-Microgrid System Considering Wind Power Uncertainty7
Influence of Parasitic Parameters on Dynamic Threshold Voltage Hysteresis of Silicon Carbide MOSFETs7
High Step-up SEPIC Converters Based on a Family of Coat Circuit7
Risk-averse two-stage distributionally robust economic dispatch model under uncertain renewable energy7
Overvoltage Calculation Method for Sending System Under DC Fault Disturbance Considering the Influence of Renewable Energy7
Integrated Planning of Charging Piles and Battery Swapping Stations Considering Spatiotemporal Distribution of Electric Vehicles7
Physics insight of the inertia of power system and methods to provide inertial response6
Tube Model Predictive Control Based Cyber-Attack-Resilient Optimal Voltage Control Strategy in Wind Farms6
Thyristor-Inserted MMC Sub-Module Topology with DC Fault Blocking Capability6
Parameter Design and Transfer Characteristic Optimization of Floating-Ground Capacitive Voltage Divider for Wideband High Voltage Measurement6
Research advances of bubbles dynamics in power transformer6
Time-domain protection for collector lines in large-scale wind farms based on random matrix theory6
A modular multilevel converter with wireless magnetic power decoupling approach for three-phase MV adjustable-speed drives6
Renewable energy penetration fostered using a reversible solid oxide cell installed in an office, school, and hotel6
A currentless multiple switch open-circuit faults diagnosis strategy for modular multilevel converter with nearest level modulation in HVDC system6
Complete Protection Strategy for Loss of Excitation in Large-Scale Synchronous Condensers Applied to UHVDC Transmission6
Coordinated Operation of Active Distribution Network, Networked Microgrids, and Electric Vehicles: A Multi-Agent PPO Optimization Method6
Multi-Branch Residual Multiscale CNN Based Power Transformer Fault Diagnosis on Vibration Signal6
Extension of Distribution Transformer Life in the Presence of Smart Inverter-based Distributed Solar Photovoltaic Systems5
Multi-Agent Deep Reinforcement Learning Approach for Temporally Coordinated Demand Response in Microgrids5
Improving the Performance of DC Microgrids by Utilizing Adaptive Takagi-Sugeno Model Predictive Control5
Edge Intelligence for Smart Grid: A Survey on Application Potentials5
Model Predictive Current Control for Low-Cost Shunt Active Power Filter5
Convexification of Hybrid AC-DC Optimal Power Flow with Line-Commutated Converters5
A novel dynamic additional frequency control strategy for VSC-MTDC system5
Direction Protection Based on Time-domain Travelling Wave for Flexible MTDC Grid5
Accurate Distinction of Weak and Strong AC Grids for Emerging Hierarchical-Infeed LCC-UHVDC Systems5
Dual Clustering Detection Model of Power Theft Based on User Behavior Analysis5
Power System Reliability Assessment with Quantification of Demand Response Uncertainty Based on Advanced Sigmoid Cloud Model5
Energy Management of Integrated Electric-gas Prosumers with Peer-to-Peer Trading: A GNE Approach5
An Improved DGA Feature Clustering-Based Method for Transformer Fault Diagnosis5
Delay-dependent wide-area damping controller synthesis approach using Jensen's inequality and evolution algorithm5
Data-driven Based Uncertainty Set Modeling Method for Microgrid Robust Optimization with Correlated Wind Power5
Relationships of internal voltage dependence on power imbalance illustrating characteristics and roles in system dynamics of inertial-controlled DFIG-based wind turbines4
Mixed-Integer Linear Programming Based Distribution Network Reconfiguration Model Considering Reliability Enhancement4
Demonstrating the Transient System Impact of Cyber-Physical Events Through Scalable Transmission and Distribution (T&D) Co-Simulation4
High-Quality Sample Generation for Power System Transient Stability Assessment Based on Data-Driven Methods4
Single-stage Five-level Common Ground Transformerless Inverter with Extendable Structure for Centralized Photovoltaics4
Intelligent breakage assessment of composite insulator on overhead transmission line by ellipse detection based on IRHT4
Joint Planning of Active Distribution Network and EV Charging Stations Considering Vehicle-to-Grid Functionality and Reactive Power Support4
Extreme Scenarios Based Data-Adaptive Probability Uncertainty Set for Distributionally Robust Transmission Expansion Planning4
A method to quantify the logical node importance for IEC 61850 based substation automation system4
Improved Mathematical Model for a Single-Ground Arcing Fault in Medium Voltage Distribution Networks4
Comprehensive transient stability enhancement control of a VSG considering power angle stability and fault current limitation4
Real-time Power Flow Control Strategy for Electric Railway FTSSs Integrated with PVs and ESSs4
P2P Energy Trading Considering Prosumer Preference and System Risk4
Enhanced Two-Step Nearest Level Control with Enhanced Power Quality for Electric Ship System4
Improved Quasi-Square-Wave Modulation Suitable for Isolated Modular Multilevel DC-DC Converter4
Grounding Faults in Series-Connected-Based Offshore Wind Farms: DC Link Current Control4
High Efficient Design of a Reconfigurable Step-Up DC-DC Converter with Fault-Tolerant Capability4
Collaborative Fault Recovery and Network Reconstruction Method for Cyber-physical-systems Based on Double Layer Optimization4
Coordinated Suppression Method of Fault Current for DC Grid with Novel Dissipative Resistors Topology4
Dispatchable Region for Active Distribution Networks Using Approximate Second-Order Cone Relaxation4
Mechanism analysis of additional damping control strategies for the high-frequency resonance of MMC connected to AC grid4
Analysis of China's Electricity Price and Electricity Burden of Basic Industries Under the Carbon Peak Target Before 20304
Control and Stability of Large-scale Power System with Highly Distributed Renewable Energy Generation: Viewpoints from Six Aspects4
Design of Double-Loop Current Transformer Based on Magnetic Field Incomplete Cancellation4
An adaptive and sustainable distribution system islanding strategy for post-restoration failures4
Data-driven detection and identification of line parameters with PMU and unsynchronized SCADA measurements in distribution grids4
Energy planning of Beijing towards low-carbon, clean and efficient development in 20354
Optimal Secondary Control of Islanded AC Microgrids with Communication Time-delay Based on Multi-agent Deep Reinforcement Learning4
A Hybrid Signal Processing Method Combining Mathematical Morphology and Walsh Theory for Power Quality Disturbance Detection and Classification4
A time-delay correction control strategy for HVDC frequency regulation service4
Switching Behavior of Cascode GaN Under Influence of Gate Driver4
Interface Finite Volume Method with Low Calculating Amount for Step Size Varying Electro-Quasistatic Field Problem4
Correction of Time-varying PMU Phase Angle Deviation with Unknown Transmission Line Parameters4
Coordinated Control Strategy for Hybrid Black Start with LCC HVDC System and Auxiliary Synchronous Generator4
Adaptive Emergency Control of Power Systems Based on Deep Belief Network3
Transient Stability Analysis and Design of VSGs with Different DC-Link Voltage Controllers3
A successive MISOCP algorithm for islanded distribution networks with soft open points3
Design of Robust Var Reserve Contract for Enhancing Reactive Power Ancillary Service Market Efficiency3
Composite Converter Combined APFC with Switched-capacitor Converter3
Coordinated planning of fast charging station and distribution network based on an improved flow capture location model3
Robust forecasting-aided state estimation considering uncertainty in distribution system3
Data center power system stability — part II: System modeling and analysis3
Mechanism of Eddy Current-induced Electromagnetic Force and Vibration Noise of Large-Capacity Transformer Oil Tanks3
Circulating Current Suppression and Current Sharing Strategy for Parallel IPT System Based on d-q Synchronous Rotating Frame3
Online Monitoring Method for Junction Temperature of SiC MOSFETs based on Temperature Sensitive Electrical Parameter3
Novel Control Method for the MMC Connected to Wind Farms3
Resilient Smart Power Grid Synchronization Estimation Method for System Resilience with Partial Missing Measurements3
Analytic Formulae for Estimating Motor Proportion of Load Model Under Small Disturbance3
Power grid fault diagnosis based on a deep pyramid convolutional neural network3
Enabling Inverter-based Resource Stability Control in Power Systems with High Renewable Penetration3
Adaptive Early Warning Method of Cascading Failures Caused by Coordinated Cyber-Attacks3
A model and data hybrid driven approach for quantifying the meteorology-dependent demand flexibility of building thermal loads3
Efficient calculation and component analysis of fault current in MMC-HVDC grid3
Cascaded Sliding-Mode Observer for High-Order Systems with Lower-Triangular Structure3
Stochastic and distributed optimal energy management of active distribution network with integrated office buildings3
Adaptive Allocation Strategy for Power Storage in Isolated DC Microgrid with Unmatched Line Impedance and Abnormal Communication3
Incorporating optimal operation strategies into investment planning for wind/electrolyser system3
A novel protection scheme for MMC-MTDC transmission lines based on fault coefficient3
Electricity Pricing with Continuous-time Commodity Model and Non-monotonic Load Curve3
A compact real-time simulator with spatial-temporal parallel design for large-scale wind farms3
A new incentive scheme to incentivize flexible customers for phase balancing3
Communication Resources Allocation for Time Delay Reduction of Frequency Regulation Service in High Renewable Penetrated Power System3
Stability Improvement Method for Multi-Converter Distribution Systems Based on Impedance Sensitivity3
Surface Charge Accumulation Characteristics on DC GIL Three-post Insulators Considering the Influence of Temperature Gradient3
Simplified Cluster Voltage Balancing Control Based on Zero-Sequence Voltage Injection for Star-Connected Cascaded H-Bridge STATCOM3
Data-Driven Fault Detection of Multiple Open-Circuit Faults for MMC Systems Based on Long Short-Term Memory Networks3
A Novel Harmonic State-space Modelling Method on the Modular Multilevel Matrix Converter and Coupling Analysis3
Metal-Free Optical Pressure Sensor with High Sensitivity and Extensive Range3
Optimal Operation Strategy for Rural Microgrid Considering Greenhouse Load Control3
Risk-based Two-stage Optimal Scheduling of Energy Storage System with Second-life Battery Units3
Interaction Quantification of MTDC Systems Connected with Weak AC Grids3
Optical Sensor with Wide Range and High Sensitivity for Internal Magnetic Field Detection of Transformer2
A Transformer Condition Assessment Method Based on Combined Deep Neural Network2
A residue based open-loop modal analysis method for detecting LFMR of PMSG-WFs penetrated power systems2
New Hybrid Model of Power Transformer Fault Classification using C-Set & MFCM — MCSVM2
Simulation Analysis of DC Fault Interruption Characteristics of Superconducting Electric Aircraft Propulsion2
Multi-Time Interval Forecasting-Aided State Estimation Incorporating Phasor Measurements for Power Systems with Renewable Energy Sources2
Exploring the Potential of IoT-Blockchain Integration Technology for Energy Community Trading: Opportunities, Benefits, and Challenges2
Forecasting of global solar insolation using ensemble Kalman filter based clearness index model2
Risk-Averse Optimal Scheduling of Regional Electricity-Heating Integrated Energy System Considering Interface with Microgrids2
Semi-Implicit Continuous Newton Method for Power Flow Analysis2
Bi-Level Hybrid Stochastic/Robust Optimization for Low-Carbon Virtual Power Plant Dispatch2
Achieving an Accurate Random Process Model for PV Power Using Cheap Data: Leveraging the SDE and Public Weather Reports2
Simultaneous Power Compensation and Ground Fault Elimination in Distribution Networks2
Energy savings estimation of a distribution system in presence of intelligent volt-VAr control based on IEEE Std. 1547-20182
Microgrid Energy Management with Energy Storage Systems: A Review2
Distributed event-triggered control for frequency restoration in islanded microgrids with reduced trigger condition checking2
Insulation Properties and Degradation Mechanism for XLPE Subjected to Different Aging Periods2
Simplified EMT Model of Multiple-Active-Bridge Based Power Electronic Transformer with Integrated Energy Storage2
Stochastic Flexibility Evaluation for Virtual Power Plants by Aggregating Distributed Energy Resources2
Non-isolated Step-up DC-DC Converter Based on Switched Capacitor Cells2
Interval Economic Dispatch for Commercial Campus Integrated Energy System with Demand Response Considering Multiple Uncertainties2
Understanding of DC partial discharge: Recent progress, challenges, and outlooks2
Impedance-Based Islanding Detection for DC Microgrid with Multiple Distributed Generators2
Identification of the Worst-Case Static Voltage Stability Margin Interval of AC/DC Power System Considering Uncertainty of Renewables2
Distributed Dispatch of Multiple Energy Systems Considering Carbon Trading2
Adaptive Mitigation Control for Wideband Oscillations of Offshore Wind Farms With MMC-HVDC System2
Filler Size Effect on Tuning Electrical, Mechanical, and Thermal Properties of Field Grading Composites2
Robust load frequency control for isolated microgrid based on double-loop compensation2
Solution to Coordination of Transmission and Distribution for Renewable Energy Integration into Power Grids: An Integrated Flexibility Market2
Dynamic equivalent modeling for black-box microgrid under multi-operating-point by using LSTM2
Microgrid Energy Management: Classification, Review and Challenges2
Dynamic Energy Dispatch Strategy for Integrated Energy System Based on Constrained Reinforcement Learning2
CVaR-based reserve optimization for isolated multi-energy complementary generation system in mixed time scale2
Virtual P2P Transaction Integrated Expansion Planning for Distribution Networks2
Hybrid Physics and Data-driven Contingency Filtering for Security Operation of Micro Energy-water Nexus2
Energy Management of Price-Maker Community Energy Storage by Stochastic Dynamic Programming2
Graph computing and its application in power grid analysis2
Planning of DC Electric Spring with Particle Swarm Optimization and Elitist Non-Dominated Sorting Genetic Algorithm2
Specific Position and Influence of Moisture in Newly-Installed Composite Insulators2
Novel Planning Approach for Fast-charging Station in Integrated System2
Very Short-Term Forecasting of Distributed PV Power Using GSTANN2
Impact of Dead-Time on Resonance in Doubly Fed Induction Generator Under Weak Grid2
Transient Power Angle Control for a Droop-Controlled Voltage Source Converter Considering Fault Current Limitation2
Pressure-dependent thermal network for press-pack power module with prognostics of mechanical status2
Zero-Phase CARIMA Filtering and Application in Wind-Storage System Sizing and Power Dispatch Optimization2
Discharge characteristics of bubbles at the interface between AlN ceramic and FC-72 liquid2
Review of Networked Microgrid Protection: Architectures, Challenges, Solutions, and Future Trends2
Distributionally Robust Optimization Based Restoration for Integrated Electricity-Gas Systems Incorporating Wind Power and Flexible Reserve Capacity Allocations2
Impact of Frequency Anti-windup Limiter on Synchronization Stability of Grid Feeding Converter2
Grid Forming H∞ Control for HVDC Diode Rectifier-connected Wind Power Plants2
Planning Method and Coordinated Operation Strategy for Multi-Station Integration System2
Data-Driven Approach for Analyzing and Correlating Energy Market Products: Case Studies of Denmark and Croatia2
Moisture evaluation of oil-immersed insulation in bushing based on frequency domain spectroscopy and grey relational analysis2
A Two-Step Approach for Multi-Topology Identification and Parameter Estimation of Power Distribution Networks2
Data-driven Static Equivalence with Physics-informed Koopman Operators2
Modeling VSC with Active/Reactive Current Excitation and Internal Voltage Response for Grid Amplitude/Frequency Modulation Dynamics Analysis2
Cooperative Electricity-Hydrogen Trading Model for Optimizing Low-Carbon Travel Using Nash Bargaining Theory2
Multi-stage Defender-Attacker-Defender Model for Distribution System Resilience Enhancement in Ice Storms with Line Hardening, Mobile Device and Repair Crew Dispatching2
Detection Method for Cascading Failure of Power Systems Based on Epidemic Model2
Reliability Assessment of Integrated Electricity and Natural Gas Transmission Systems in Presence of Power-to-gas and Combined Heat and Power Technologies2
A new method for the aging evaluation of oil-paper insulation by n-butanol and methanol2
Operating-Point Identification from Dimensions of Alternating Signal Based on Incremental Iterative Mapping Mechanism for Analyzing Dynamics of AC Systems2
Control Parameters Design Procedure for Multi-Converters DC Power System Considering Dynamic Interaction Between Converters2
A two-stage planning method of the energy router considering the optimal operation in distribution network2
Improved Control Strategy of Current-Source Converter for HVDC System2
Improved MPPT Control Strategy for PV Connected to Grid Using IncCond-PSO-MPC Approach2
Constraint Learning-based Optimal Power Dispatch for Active Distribution Networks with Extremely Imbalanced Data2
Development of Mixed Insulation Oil as Alternative Liquid Dielectric: A Review2
Optimal Allocation Strategy for Electric EPSVs and Hydrogen Fuel Cell EPSVs Balancing Resilience and Economics1
Stochastic Economic Dispatch Based Optimal Market Clearing Strategy Considering Flexible Ramping Products Under Wind Power Uncertainties1
Economy Analysis of Flexible LCC-HVDC Systems with Controllable Capacitors1
Large-Disturbance Instability Modes of Power System with Synchronous Generator and VSC Interfaced Generation1
Distributionally Robust Chance-Constrained Optimization for Soft Open Points Operation in Active Distribution Networks1
A Survey on Model Predictive Control of DFIGs in Wind Energy Conversion Systems1
New-Type Power System Stabilizers (NPSS) for Damping Wideband Oscillations in Converter-Dominated Power Systems1
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