The Control of the Pumping Complex Electric Drive in Non-steady Operation States

Contents
Preface
Abbreviations
Symbols
Chapter 1
The Characteristic of the Non-Steady States  of the Pumping Complex Operation
	1.1. The Structure and Characteristic  of Pumping Complex Equipment
	1.2. The Dynamic Loads in the Working and Emergency Modes of the Pumping Complex Operation
	1.3. The Means of the Pumping Complex  Hydrodynamic Protection
	1.4. The Cavitation Processes in the Pumping Complex
		1.4.1. The Essence of the Phenomenon and the Types of Cavitation
		1.4.2. The Reasons for the Occurrence of Cavitation and Its Location in the Pumping Complex
		1.4.3. Cavitation Parameters
		1.4.4. Cavitation Process Influence on the Pumping Complex Characteristics
	1.5. The Analysis of the Existing Methods  for the Reduction of the Cavitation Processes in the Pumping Complex
	Conclusion
Chapter 2
Working Out the Models of  a Pumping Complex with a Variable-Frequency Electric Drive  at the Development of Non-Steady Processes in the Pipeline Network
	2.1. The Approximation of the Hydraulic Characteristics of the Pumping Complex Pipeline Valves
	2.2. The Mathematical Description of a Pumping Complex  with Adjustable Pipeline Valves
	2.3. The Dynamic Processes in a Pumping Complex with Adjustable Pipeline Valves
	2.4. The Block Diagrams of the Models  of a Pumping Complex with a Variable-Frequency  Electric Drive and a Cavitation Channel in the Pipeline Network
		2.4.1. The Power Components of the Liquid Head Motion in the Pumping Complex
		2.4.2. The Model of a Pumping Complex with One Section  of the Hydraulic Network
		2.4.3. The Model of a Cavitation Channel
		2.4.4. The Model of a Pumping Complex Operating for the Communication Network of Complicated Configuration
		2.4.5. The Transient Processes in a Pumping Complex  with a Cavitation Channel
	2.5. The Substantiation of the Possibility  of the Use of the Gas-Vapor Mixture Energy  in the Liquid Flow
	Conclusion
Chapter 3
The Methods and Principles  of Making the Control Systems  of the Electric Drive of the Pumping Complex in Non-Steady  Operation States
	3.1. Working out the Electromechanical System of the Dynamic Loads Decrease in a Pumping Complex
		3.1.1. The Mechanical Characteristics of the Pipeline Valves with a Variable-Frequency Electric Drive
		3.1.2. The Determination of the Power and the Choice of a Variable-Frequency Electric Drive of the Pipeline Valves
		3.1.3. The Structure and Algorithm of the Operation of the Electromechanical System of the Dynamic Loads Decrease in a Pumping Complex
	3.2. The Method for the Determination of the Limits of the Non-Cavitation Operation of the Pumping Complex When the Process Variables are Regulated
	3.3. The Development of the Device for the Controlof the Cavitation Processes in the Pumping Complex by Means  of a Variable-Frequency Electric Drive
		3.3.1. The Functional Diagram of the Electromechanical Device for the Control of the Cavitation Processes
		3.3.2. The Dynamic Modes of the Pumping Complex Operation
	Conclusion
Chapter 4
The Identification of the Pumping Complex Parameters in Non-Steady Operation States
	4.1. The Pumping Complex Equivalent Electric Circuits Based on the Electrohydraulic Analogy
	4.2. Working out the Pumping Complex Power Model Taking into Account the Nonlinear Processes  in the Pipeline Network
	4.3. The Power Processes in the Pumping Complex at the Development of Cavitation in the Pipeline Network
	4.4. The Method for the Identification of the Pumping Complex Parameters in Non-Steady Operation States
	Conclusion
Chapter 5
Working out the Systems of the Automatic Control of the Pumping Complex Electric Drive at the Development of the Non-Steady Processes in the Hydronetwork
	5.1. The Development and Research of the Closed Loop Electromechanical System for the Decrease of the Dynamic Loads in the Pumping Complex
		5.1.1. The Requirements to Making a Closed Loop System
		5.1.2. The Substantiation of the Choice of the Criterion of the Quality of the System for the Decrease of the Dynamic Loads in the Pumping Complex
		5.1.3. The Optimization of the Closed Loop Electromechanical System for the Decrease of the Dynamic Loads in the Pumping Complex
		5.1.4. The Research of the Dynamic Processes in the Pumping Complex
	5.2. The Development and Research of the Closed Loop System for the Automatic Control of the Pumping Complex Electric Drive with the Minimization  of the Power Losses in the Pipeline Network
		5.2.1. The Requirements to Making the System
		5.2.2. The Substantiation of the Choice of the Criterion of the Quality of the System for the Automatic Control of the Pumping Complex Electric Drive
		5.2.3. Working out the Functional Diagram of the Closed Loop System for the Automatic Control of the Pumping Complex Electric Drive
		5.2.4. The Research of the Dynamic Processes in the Closed Loop System  for the Automatic Control of the Electric drive of the Pumping Complex  with a Cavitation Channel when the Pressure in the Pipeline is Stabilized
	Conclusion
Chapter 6
Experimental Research
	6.1. The Structure of the Pumping Unit  Laboratory Complex
	6.2. The Dynamic Processes in the Pumping Complex  at the Regulating Stopcock Control
	6.3. The Pumping Complex Characteristics  at the Cavitation Control by Means  of the Variable-Frequency Electric Drive
	6.4. The Harmonic Analysis of the Power in a Pumping Complex with Periodic Nonlinear Processes
	Conclusion
Conclusion
References
Appendices
	Appendix A
		The Characteristic of Water- and Heat-Supply Pumping Complexes
	Appendix B
		The Block Diagram of a Pumping Complex Model
	Appendix C
		The Algorithm of the Operation of the Electromechanical Device of Cavitation Processes Control
	Appendix D
		The System of the Automatic Control of the Electric Drives  of the Pumping Complex
	Appendix E
		The Characteristic of the Experimental Laboratory Plant
	Appendix F
		The Typical Flowsheets of Pumping Complexes
	Appendix G
		The Comparative Characteristic of the Pipeline Valves as the Means of Hydrodynamic Protection of Modern PC
	Appendix H
		The Hydraulic Characteristics of the Pipeline Valves  of the Pumping Complexes
	Appendix I
Authors’ Contact Information
Index
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