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About Of The Book:

This book is a revision of the authors’ earlier work, Line Loss in Electric Power Systems. Basic contents are retained in the revision, including the basic knowledge and methods of theoretical calculation of line loss in electric power systems; the line loss calculation considering power factor, the concept of load loss coefficient, the change rule of line loss, and the methods of calculation of line loss in loss calculation units and multibranch lines; the methods of prediction of electricity line loss and line loss rate, and the principles of optimal distribution of electric supply; as well as some technical measures to reduce line loss.

New additions in the revision include the calculation of loss in complicated power grids, the calculation of loss allocation, the link electricity price and the balance between electricity flow and capital flow within power grid enterprises, the composition and application of multi-section electricity price, the coal-electricity price linkage, and the utilization of mass information on line loss.

This book is intended as a reference for professionals working on line loss management with power grid enterprises, power grid designers and operators, and for graduate students majoring in the study of electric power systems.

It has been over a decade since the Chinese publication of Line Loss in Electric Power Systems. To keep pace

with technological developments, I started a revision as early as 2002, following the main principles that the

theoretical framework and characteristics of the first edition should be retained, with new contents added

according to new problems after the reform of electric power systems and the new requirements for line loss

management practices and in combination with practical experience.

The theoretical framework of the first edition used the loss factor method as the mainline and the quadratic

trinomial ΔA = B + CA2 as the subline. The random test method was used to verify the wide applicability and

validity of the load factor formula put forward by Liu Yingkuan, a Chinese scholar. The equivalent load curve

method was extended and expanded. The line loss calculation curve was given for various designs of voltage

class lines. The conditions at which the minimum line loss rate was achieved were set out. The relationship

between the load loss coefficient and six variables was demonstrated by using the concept of the loss factor of

the equivalent load curve. The inherent law between the electricity line loss and the electric supply change

was analyzed, and then the electricity line loss prediction formula was put forward.

The concept of marginal line loss rate was first introduced, and based on this, the optimal distribution of an

electric supply was proposed. The first edition provided and compared several methods of theoretical calcu-

lation of line loss in a multi-branch distribution network. As the construction of smart distribution networks is

being vigorously promoted today, these methods provide multiple choices for the intelligent calculation and

control of line loss in the distribution network. The first edition comprehensively explained the technical mea-

sures of loss reduction. In addition, this book gives many examples to help readers understand the content and

refer to this book during their work.

Maintaining the theoretical system of the first edition, this revision makes small adjustments to the

sequence of chapters and supplements these with new content. The second edition contains 15 chapters

as compared to 10 chapters in the first edition, and 36 examples as compared to 27 in the first edition.

The title of the revision is changed to Analysis and Calculation of Line Loss in Electric Power Systems which

is more consistent with the contents of this book.

Content of The Book:

1 Overview

2 Calculation of Line Loss by Current Load Curve

3 Probability Theory Analysis of Current Load Curve

4 Calculation of Line Loss by Power Load Curve

5 Line Loss Calculation after Reactive Compensation

6 Change Law for the Electric Energy Losses of Power Grids

7 Analysis and Control of Line Loss Rate Indicators of Power Grids

8 Theoretical Calculation of Electric Energy Losses of Power Grid Units

9 Calculation of Electric Energy Losses of Multi-branch Lines

10 Calculation of High-voltage Power Grid Losses

11 Analysis and Calculation of Loss Allocation

12 Technical Measures for the Reduction of Line Losses

13 Line Loss Prediction and Loss Reduction Plan for Power Grids

14 Analysis of the Influence of Power Grid Line Losses on Power Grid Enterprises

15 Management and Utilization of Line Loss Mass Information for an Electric Power System

Information Of The Book:

File Name :Line Loss Analysis and Calculation of Electric Power Systems

File Size : 8.6 MB

Language :English

By :Anguan Wu and Baoshan Ni

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