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[null,"1.","Record Nr.",null,"UNINA9910465412603321"]
[null,null,"Autore",null,"Wheeler Garon"]
[null,null,"Titolo",null,"Language teaching through the ages / / Garon Wheeler"]
[null,null,"Pubbl/distr/stampa",null,"New York : , : Routledge, , 2013"]
[null,null,"ISBN",null,"0-203-07645-1"]
[{"$nulls":4},"1-299-27999-6"]
[{"$nulls":4},"1-135-12562-7"]
[null,null,"Descrizione fisica",null,"1 online resource (423 p.)"]
[null,null,"Collana",null,"Routledge research in education ; ; 93"]
[null,null,"Disciplina",null,"418.0071"]
[null,null,"Soggetti",null,"Language and languages - Study and teaching - History"]
[{"$nulls":4},"Electronic books."]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,null,"Note generali","Description based upon print version of record."]
[null,null,null,"Nota di bibliografia","Includes bibliographical references and index."]
[null,null,"Nota di contenuto",null,"pt. 1. In the beginning -- pt. 2. The early modern world -- pt. 3. Modern times."]
[null,null,null,"Sommario/riassunto","\"Konrad Koerner, a leading historian of linguistics, has long said that an academic field cannot be considered to have matured until it has history as one of its subfields. The history of linguistics is a growing area, having come into its own in the 1960s, especially after Noam Chomsky looked for historical roots for his work. In contrast, the history of language teaching has been neglected, reflecting the insecurity and youth of the field. Most works on the subject have been written by linguists for other linguists, and typically focus on a specific period or aspect of history. This volume concentrates on the basic issues, events, and threads of the history of the field - from Mesopotamia to the present - showing how a knowledge of this history can inform the practice of language teaching in the present\"--"]
[null,"2.","Record Nr.",null,"UNINA9910544855903321"]
[null,null,"Autore",null,"Sun Yao"]
[null,null,"Titolo",null,"Series-parallel converter-based microgrids : system-level control and stability / / Yao Sun [and five others]"]
[null,null,"Pubbl/distr/stampa",null,"Cham, Switzerland : , : Springer, , [2022]"]
[{"$nulls":4},"©2022"]
[null,null,"ISBN",null,"3-030-91511-5"]
[null,null,"Descrizione fisica",null,"1 online resource (384 pages)"]
[null,null,"Collana",null,"Power Systems"]
[null,null,"Disciplina",null,"621.31"]
[null,null,"Soggetti",null,"Microgrids (Smart power grids)"]
[null,null,"Lingua di pubblicazione",null,"Inglese"]
[null,null,"Formato",null,"Materiale a stampa"]
[null,null,null,"Livello bibliografico","Monografia"]
[null,null,"Nota di contenuto",null,"Intro -- Preface -- Acknowledgments -- Contents -- About the Authors -- List of Symbols -- 1 Overview of Microgrid -- 1.1 Microgrid Concept and Challenges -- 1.1.1 Microgrid Concept -- 1.1.2 Challenges for Microgrid -- 1.2 Converters Classification in Microgrid -- 1.2.1 Grid-Following Converter -- 1.2.2 Grid-Forming Converter -- 1.3 Architecture of Microgrid -- 1.3.1 Parallel-Type Microgrid -- 1.3.2 Series-Type Microgrid -- 1.3.3 Hybrid Series-Parallel Microgrid -- 1.4 Hierarchical Control Theory-General Introduction and Motivation -- 1.4.1 Primary Control -- 1.4.1.1 Conventional Droop Control -- 1.4.1.2 Virtual Impedance Control -- 1.4.2 Secondary Control -- 1.4.2.1 Centralized Control -- 1.4.2.2 Distributed Control and the Consensus Algorithm -- 1.4.3 Tertiary Control -- 1.5 Microgrid System Stability -- 1.5.1 Classification of Microgrid System Stability -- 1.5.1.1 Power Supply and Balance Stability -- 1.5.1.2 Control System Stability -- 1.5.2 Stability Analysis and Performance Assessment -- 1.5.2.1 Time-Scale Separation and Model Reduction -- 1.5.2.2 Stability of a Single Converter Connected to an Infinite Bus -- 1.5.2.3 Stability of Multi-Converter Systems -- 1.5.2.4 Stability of Multi-Converter Multi-Machine Systems -- 1.6 Organization of the Book -- References -- Part I Parallel-Type Microgrid System -- 2 Unified Droop Control Under Different Impedance Types -- 2.1 Different Droop Control Under Different Impedance Types -- 2.2 Basic Droop Control -- 2.2.1 Fundamental Concept of Frequency Droop -- 2.2.2 Equivalence of Virtual Impedance and Angle Droop -- 2.2.3 Analogy Between Angle Droop and Frequency Droop -- 2.3 Unified Droop Control Under Different Impedance Types -- 2.3.1 Unified Droop Control -- 2.3.2 "]
[{"$nulls":4},"Small-Signal Analysis -- 2.4 Simulation Results -- 2.5 Experimental Results -- 2.6 Conclusion -- References."]
[{"$nulls":4},"3 Dynamic Frequency Regulation Via Adaptive Virtual Inertia -- 3.1 Analogy Between Droop Control and Virtual Synchronous Generator -- 3.2 Algorithm of Adaptive Virtual Inertia -- 3.2.1 Comparison Between SG and Droop-Based DG -- 3.2.2 Adaptive Virtual Inertia -- 3.2.3 Practical Control Scheme Without Derivative Action -- 3.3 Stability Proof -- 3.3.1 Single Inverter-Based DG in Grid-Connected Mode -- 3.3.2 Synchronization of Multiple DGs in Islanded Mode -- 3.4 Design Guidelines for Key Control Parameters -- 3.4.1 Design Guideline for Droop Damping Coefficient Dm -- 3.4.2 Design Guideline for Inertia Coefficient J0 -- 3.4.3 Design Guideline for Inertia Compensation Coefficient k -- 3.4.4 Parameter Design to Limit Excessive RoCoF -- 3.4.5 Adaptive Inertia Bound [Jmin, Jmax] to Avoid Long-Term Overcapacity of Converters -- 3.5 Hardware-In-Loop (HIL) Results -- 3.5.1 Case 1: Under Resistive Time-Varying Load -- 3.5.2 Case 2: Under Frequent-Variation Load -- 3.5.3 Case 3: Under Induction Motor (IM) -- 3.5.4 Case 4: Comparisons with Alternating Inertia Method -- 3.5.5 Case 5: Adaptive Inertia Control with Three DGs -- 3.5.6 Case 6: Adaptive Inertia Control with RoCoFLimitation -- 3.6 Conclusion -- References -- 4 Accurate Reactive Power Sharing -- 4.1 Analysis of Conventional Droop Control Method -- 4.1.1 Conventional Droop Control -- 4.1.2 Reactive Power Sharing Errors Analysis -- 4.2 Reactive Power Sharing Error Compensation Method -- 4.2.1 Droop Controller -- 4.2.2 Communication Setup -- 4.2.3 Convergence Analysis -- 4.3 Simulation Results -- 4.3.1 Case 1: Power Sharing Accuracy Improvement -- 4.3.2 Case 2: Effect of Communication Delay -- 4.3.3 Case 3: Effect of Load Change -- 4.4 Experimental Results -- 4.5 Conclusion -- References -- 5 Droop-Based Economical Dispatch -- 5.1 Economical Dispatch Problems Formulation."]
[{"$nulls":4},"5.2 GOD Criterion and Decentralized Control Schemes -- 5.2.1 GOD Criterion Via Decentralized Manner -- 5.2.2 Decentralized Suboptimal Scheme -- 5.3 Simulation and Experimental Results -- 5.3.1 Case 1: Global Optimal Case -- 5.3.2 Case 2: Suboptimal Case -- 5.3.3 Case 3: Suboptimal Case -- 5.4 Conclusion -- References -- 6 Dynamic Distributed Consensus Control Strategy -- 6.1 Analysis of Modular UPS System -- 6.1.1 Configuration of Modular UPS System -- 6.1.2 Operation Principle of Modular UPS System -- 6.2 Dynamic Consensus-Based Adaptive Virtual ResistanceControl -- 6.3 Simulation Results -- 6.3.1 Case 1: Dynamic Performance Test with Linear Load and Mismatched Line Resistance -- 6.3.2 Case 2: Dynamic Performance Test with Both Linear and Nonlinear Loads -- 6.4 Experimental Results -- 6.4.1 Case 1: Under Linear Load -- 6.4.2 Case 2: Under Generalized Load -- 6.5 Conclusion -- References -- 7 Distributed Event-Triggered Control with Less Communication -- 7.1 Islanded Microgrid Analysis -- 7.1.1 Reactive, Unbalanced, and Harmonic Power Sharing Analysis in Islanded AC Microgrids -- 7.1.2 Communication Network -- 7.2 Distributed Event-Triggered Control -- 7.2.1 Power Calculation -- 7.2.2 Controller Design -- 7.3 Stability Analysis -- 7.3.1 Proof of Theorem -- 7.3.2 Inter-Event Interval Analysis -- 7.4 Experimental Results -- 7.4.1 Case 1: Unbalanced Load -- 7.4.2 Case 2: Nonlinear Load -- 7.4.3 Case 3: Comparison with Periodic Communication -- 7.5 Conclusion -- References -- Part II Series-Type Microgrid Systems -- 8 Decentralized Method for Islanded Operation Mode -- 8.1 Series-Type Microgrid Configuration -- 8.2 Traditional Operation Mode -- 8.3 Decentralized Control Method Design -- 8.3.1 An f-P/Q Droop Control Scheme -- 8.3.2 A New Decentralized Control with Unique Equilibrium Point -- 8.3.3 Power Factor Angle Droop Control -- 8.4 Stability "]
[{"$nulls":4},"Analysis."]
[{"$nulls":4},"8.5 Case Study -- 8.5.1 Case 1: Suited for All Types of Loads -- 8.5.2 Case 2: Unique Equilibrium Point -- 8.6 Conclusion -- References -- 9 Decentralized Optimal Economical Dispatch Scheme -- 9.1 Economical Optimization of Series-Type Microgrids -- 9.1.1 Economical Optimization Problem Formulation -- 9.2 Communication-Free Economical Operation Control Scheme -- 9.2.1 Control Scheme -- 9.2.2 Steady-State Analysis -- 9.3 Stability Analysis -- 9.4 Simulation Results -- 9.4.1 Case 1: Switch Between the RL and RC Load -- 9.4.2 Case 2: Optimal Economical Operation Under RL Load -- 9.4.3 Case 3: Optimal Economical Operation Under RC Load -- 9.4.4 Case 4: Capacity Constraints -- 9.4.5 Case 5: Comparisons Between the Scheme and Existing Method -- 9.4.6 Case 6: Performance of the Scheme Under the Feeder Impedance Variation -- 9.5 Experimental Results -- 9.6 Conclusion -- References -- 10 Decentralized SOC Balancing Control for Series-Type Storages -- 10.1 Decentralized SOC Balancing Control -- 10.1.1 Equivalent Model of Series Energy Storage System -- 10.1.2 Approximate Relationship Between SOC and Output Power -- 10.1.3 SOC Balancing Control Method -- 10.1.4 Design of Double Control Loop -- 10.2 Stability Analysis of the Decentralized SOC BalancingControl -- 10.2.1 Singular Perturbation Theory -- 10.2.2 System Model -- 10.2.3 Analysis on the Outer System -- 10.2.4 Analysis on the Boundary Layer System -- 10.3 Simulation Results -- 10.3.1 Case 1: SOC Balancing in Four Quadrant Operations -- 10.3.2 Case 2: Mode Switching Between Discharging and Charging -- 10.3.3 Case 3: Simulation Tests Under Discharging Mode with Load Characteristics Changing -- 10.3.4 Case 4: Different Capacities of ESU -- 10.3.5 Case 5: Comparison of ESS with and Without SOC Balancing Control -- 10.4 Experimental Results -- 10.5 Conclusion -- References."]
[{"$nulls":4},"11 Decentralized Control Strategies in Grid-Connected Mode -- 11.1 Decentralized Control for Grid-Connected Series-Connected Inverters -- 11.1.1 Equivalent Models of Grid-Connected Series-Connected Inverters -- 11.1.2 Decentralized P-ω Droop Control -- 11.1.3 Steady State and Stability Analysis -- 11.1.4 Simulation Results -- 11.2 Decentralized Control for Series-Connected H-BridgeRectifiers -- 11.2.1 Models of Series-Connected Rectifiers -- 11.2.2 Decentralized Control for Series-Connected H-Bridge Rectifiers -- 11.2.3 Steady State and Synchronization Mechanism Analysis -- 11.2.4 Discussion and Comparisons Between the Introduced Control and Existing Methods -- 11.2.5 Experimental Results -- 11.3 Decentralized Control Scheme for Medium/High Voltage Series-Connected STATCOM -- 11.3.1 Models of Series-Connected STATCOM -- 11.3.2 Decentralized Control for Series-ConnectedSTATCOM -- 11.3.3 Steady State and Stability Analysis -- 11.3.4 Improved Decentralized Control for Abnormal-Grid Condition -- 11.3.5 Simulation Results -- 11.4 Conclusion -- References -- 12 A Master-Slave Control in Grid-Connected Applications -- 12.1 Hybrid Voltage/Current Control -- 12.1.1 Control Configuration of Series Inverters -- 12.1.2 Hybrid Voltage/Current Control in DecentralizedManner -- 12.2 Performance Discussion and Comparison -- 12.2.1 Steady-State Analysis and Comparison with Existing Methods -- 12.2.2 Synchronization Mechanism -- 12.2.3 Discussion of One-to-All-Failure Redundancy -- 12.3 Experimental Results -- 12.3.1 Case 1: Source Power Change Under Unity PF -- 12.3.2 Case 2: Grid Voltage Sag Under No-Unity PF -- 12.3.3 Case 3: Large Source Power Gap Among SomeInverters -- 12.3.4 Case 4: Grid Frequency Deviation -- 12.3.5 Case 5: Grid Harmonics Condition -- 12.3.6 Case 6: Grid Impedance Variation -- 12.3.7 Case 7: One CCI "]
[{"$nulls":4},"Unit Fault Redundancy."]
[{"$nulls":4},"12.3.8 Case 8: One VCI Unit Fault Redundancy."]