CONTENTS 



PAGE 



FRONTISPIECE 6,000 KVA. SYNCHRONOUS PHASE MODI- 

 FIER AND EXCITER ii 



PREFACE 



CHAPTER 



I. INTRODUCTION i 



II. ALTERNATING-CURRENT TRANSMISSION 5 



III. SYNCHRONOUS MOTORS 8 



IV. POWER-FACTOR CONTROL OF LINE VOLTAGE . . .16 

 V. DISADVANTAGES OF VOLTAGE VARIATION .... 20 

 VI. ADVANTAGES AND DISADVANTAGES OF THE CONSTANT- 

 VOLTAGE SYSTEM 25 



VII. HISTORY OF THE CONSTANT- VOLTAGE SYSTEM ... 40 



VIII. HIGH-TENSION NET-WORKS 47 



IX. SYNCHRONOUS MOTORS IN LOCAL DISTRIBUTION . . 56 



X. COST COMPARISONS 63 



XI. FUTILITY OF USING UNUSUALLY LARGE VOLTAGE 



VARIATION 71 



XII. WORKING METHODS OF CALCULATION 74 



XIII. EFFECT OF CHARGING CURRENT 87 



TABLES 



TABLE PAGE 



I. FORMULAS FOR SHORT CONSTANT- VOLTAGE LINES. CON- 

 DITIONS GIVEN AT RECEIVER END 91 



II. FORMULAS FOR SHORT CONSTANT- VOLTAGE LINES. CON- 

 DITIONS GIVEN AT SUPPLY END 95 



III. FORMULAS FOR LONG CONSTANT- VOLTAGE LINES. CON- 

 DITIONS GIVEN AT RECEIVER END 99 



IV. FORMULAS FOR LONG CONSTANT- VOLTAGE LINES. CON- 

 DITIONS GIVEN AT SUPPLY END 104 



V. CORONA LIMIT OF VOLTAGE 108 



APPENDIX 

 REACTANCE OF STRANDED CONDUCTORS 109 



