INVESTIGATING THE PERFORMANCE OF DIFFERENTTIAL PROTECTION SCHEME OF POWER TRANSFORMER
- Project Research
- 1-5 Chapters
- Abstract : Available
- Table of Content: Available
- Reference Style: APA
- Recommended for : Student Researchers
- NGN 3000
Background of the Study
The basic scheme of differential relaying is explained with reference to the diagram below Fig.1.1:Basic Scheme of Differential Relaying The protected equipment may be a length of a circuit or a winding of a transformer or a portion of the bus etc. A current transformer (C.T.) is connected at either end of the protected equipment. Protected Equipment I1 Relay I2 I2 Direction of Current under fault Condition Direction of Power Flow Current Transformer Primary Side Current Transformer Secondary Side 4 The secondary of the circuits are interconnected as shown in figure 1.1 with a relay which may be an over current relay. Now suppose current flows through the protected equipment to an external load or to a fault at X. If the two circuits have an identical ratio, and are properly connected with respect to polarity, then the secondary induced currentI1 and I2 will circulate between the two circuits and no current flows through the relay. However if an internal fault should develop in the protected equipment or between the primaries of the two Circuits then the currents I1 and I2 will be different and the different in current (I1-I2) flows through the relay causing the relay to operate. This relay which operates on the vector difference of the current entering and leaving a protected equipment is called a differential relay and the scheme of protection as differential protection. A differential system can be arranged to cover the complete transformer, this is possible because of the high efficiency of transformer operation, and the close equivalence of ampere-turns developed on the primary and secondary windings. Figure 1.2 illustrates the principle of current transformers on the primary and secondary sides which are connected to form a circulating current system.
Related Project Materials
EVALUATION OF CALCIUM IN CHEESE FOR RECOMMENDED DIETARY ALLOWANCE
ABSTRACT
Cheese, a popular food across many cultures has been subject of many studies. It’s of many variants, prov...
THE IMPACT OF ADVERTISING TECHNIQUES AND STRATEGIES ON COMPANY SALES AND PRODUCT ACCEPTABILITY
ABSTRACT
This research work emphatically examines the impact of advertising techniques and strategies on company sales a...
THE SIGNIFICANCE OF STRATEGIC MARKETING PRACTICES TO THE EFFECTIVENESS AND EFFICIENT PERFORMANCE OF SMALL SCALE AND MEDIUM ENTERPRISE
ABSTRACT
The study examines the significance of marketing strategies on the performance of small-scale enterprise in Sho...
THE EFFECTIVENESS OF CLASSROOM TEACHER’S PEDAGOGICAL AND BEHAVIOURAL COMPETENCE ON THE TEACHING-LEARNING PROCESS
EXCERPT FROM THE STUDY
As an aimed job, teaching enables the teacher to be interested in the devel...
THE INFLUENCE OF ROLLING BUDGETS ON BUSINESS AGILITY
THE INFLUENCE OF ROLLING BUDGETS ON BUSINESS AGILITY
This study aims to: (1) investigate the impact of rolling budgets on business agilit...
DESIGN AND IMPLEMENTATION OF STUDENT EVALUATION PROGRAM (A CASE STUDY OF DAUGHTERS OF DIVINE LOVE JUNIORATE)
BACKGROUND OF STUDY
Student accomplishment evaluation is a critical and widespread topic in every classroom. Prior to th...
EFFECT OF POSITIVE AND NEGATIVE ASPECT OF FAMILY PLANNING ON MARRIED WOMEN
Abstract
Family planning is an important preventive measure against maternal and chil...
PUBLIC ACCOUNTING IN THE NONPROFIT SECTOR: CHALLENGES AND BEST PRACTICES
PUBLIC ACCOUNTING IN THE NONPROFIT SECTOR: CHALLENGES AND BEST PRACTICES
The objectives of this research are to: 1) Iden...
THE CONTRIBUTIONS OF FOREIGN DIRECT INVESTMENT TO THE NIGERIAN ECONOMY
ABSTRACT
This study investigated the contributions of Foreign Direct Investment inflows on grow...
THE IMPACT OF CREDIT RISK ON BANK PERFORMANCE IN NIGERIA
Abstract
This study intends to examine the impact of credit risk on bank performance in Nigeria for the...
