Understanding substation single line diagrams and iec. Single line diagrams of substations 6611 kv and 110. B substation standards switching diagram operating numbers bus configuration. The transformer may have differential relaying that trips all of the feeder breakers in the event of. Stardelta transformer connection is commonly employed for power supply transformers. Introduction to substations annotated instructors guide module overview this module introduces trainees to the function of substations at all levels of the power grid, with an introduction to typical substation components included. This manual on electric power distribution systems is one of a series developed to aid utility supervisory personnel at shore establishments in the performance of their duties. A single line drawn on these diagram wills always indicate at least two conductors. As a layman view, sld is nothing but consisting of various components of the electrical system like, transformer, dg. The substation design manual is not intended to replace asset management standards, but rather to act as a reference document that crossreferences existing standards and process documentation and plugs any gaps where asset management documentation does not exist. It includes information obtained from extensive research of current literature on the subject. Substation design hello all acade gurus, i am a college student and i have been given a project to design a substation single line diagram and plan layout on autocad with predefined specifications busbar schemes, lines, etc i am new to autocad and i have few questions about it.
89 line switch 90 regulating device 91 voltage directional relay 92 voltage and power directional relay 94 tripping or tripfree relay b bus f field g ground or generator n neutral t transformer. Its emphasis is on communicating the functions of the power equipment and the associated protection and control system. The basis for any substation automation specification remains the single line diagram of the substation to be controlled, protected and monitored as well as the allocation of functions to the switchgear objects. Depending on the load being served, it is possible that initial construction may be limited to one distribution circuit. Urban substations are usually built in brick, whereas rural. Electrical singleline diagram the etap one line diagram is a userfriendly interface for creating and managing the network database used for schematic network visualization. This paper proposes three approaches to classify substation single line diagrams so it can be used in a power distribution network expansion. In this video, we have demonstrated how to read and understand electrical single line diagram also called as power flow diagram. A special class of distribution substation would include a dedicated customer substation. Several crucial terms are for better understanding of the presented material. A substation is a part of an electrical generation, transmission, and distribution system. Basic distribution substation figure 1 is a one line diagram for a simple distribution substation.
Each feeder must has its own overcurrent protection. Electrical oneline diagram trace software international. The single line diagram of an 11 kv substation is shown in the figure below. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. Single bus substation this is the one line of a single bus substation fed by a single radial subtransaission line. Single line diagram of 11kv substation i want the attached picture to be made perfectly on autocad or related software so that, i can print the electrical single line diagram out. Technical specification construction of 3311 kv primary substations. Electrical design of 233kv substation line diagram. The primary switch must be able to break the transformer excitation current. The requirements in the design and other factors to be considered before the design as well. Section 4 is the load flow analysis of the substation.
The one line diagram is similar to a block diagram except that electrical elements such as switches, circuit breakers, transformers, and capacitors are shown by standardized schematic symbols. Single line diagram of 11kv substation autocad cadcam. Section 5 contains the alert summary report generated after load flow analysis. Transmission line standards aerial patrol warning signs and marker ball marking diagrams. The contractor shall finalize the layout arrangements in case of new substations in line with. Single line diagram sld the single line diagram sld is the most basic of the set of diagrams that are used to document the electrical functionality of the substation. Basic singleline diagrams for substations ieee journals. These substations may be supplied radially, tapped from a subtransmission line, or may have two sources of supply. Lsis is producing gis, which is one of the major equipment used in the high voltage substation in densely cities. This course is based on terms used in ieee and iec regulations. This substation would be similar to a distribution substation except that all of its capacity would be reserved for the service of one customer. Pdf classification of substation singleline diagrams.
This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. Collector system one line partial collector system site plan. Gis substation design and execution hv and ehv gis. This functionality allows the user to place a userconfigurable color map behind the oneline diagram. Gas insulated substation definitions and basics course no. Numbers of breakers, disconnect switches, transformers, auxiliaries, protective devices, lines and other equipment. A substation is part of a system and not an entity to itself. In this respect the process interface given by the switchgear has to be. Pdf substation design manual shally gupta academia. A mini project operation and maintenance of a 2202 kv. Electrical single line diagrampart one electrical knowhow. This helps to keep the voltages and their paths straight.
With these approaches the expertise shall confront. Load flow analysis of 2 kv substation using etap software. Etaps one line diagram provides complete busbreaker connectivity, allowing you. Design standards electrical schematic diagrams abstract this document provides standards for all electrical schematic diagrams for the lhc and its detectors. Typical electrical drawing symbols and conventions.
Single line diagram of 3311 kv jampaijala for tender purpose only. The substation component of the project will be based on the arcadia single line diagram see 5. Section 6 is the load flow analysis of the substation with an improvement to surmount. There has been close cooperation between the industry and dod representatives to provide one standard that can be universally used, rather than separate documents with their tendency to differ in various respects. Graphic symbols for electrical and electronics diagrams. Set different themes for individual one line diagrams. The single line diagram makes the system easy and it provides the facilitates reading of the electrical supply and connection. The ergon energy design philosophy is to provide substations. This technical article describes single line diagrams of two typical power substations 6611 kv and 110. Themes can be color coded based on standard, voltage level, area, ground, earthing, and grounding by ground switch. This type of connection is commonly employed at the substation. The working of the electrical equipment used in the substation is explained below in details.
When interpreting a single line diagram, you should always start at the top where the highest voltage is and work your way down to the lowest voltage. The subtransmission circuit enters the substation through a primary disconnect switch used principally to. Autocad, cadcam, solidworks, engineering, electrical engineering. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. A architectural wiring diagram the architectural wiring diagram can be referred to as a oneline diagram. Symbols for electrical and electronics diagrams of the american national standards committee y32, graphic symbols and designations.
In selecting the single line diagram for a substation its requirements from the point of view of the following should be considered. One or more or all of the below referred works are envisaged to be carried out under each package. This is because the diagram shows multiconductor cables with a single line. Please note that the evaluation will be carried out on the strength of. Single line diagram of 3311 kv jampaijala for tender. The single line diagram sld in figure 1 shows the khimti kathmandu 220400 kv transmission line and illustrates how barhabise, laphsiphedi and changunarayan grid substations are interconnected in order to enable transmission supply at 2 kv and eliminate the ongoing shortage of energy in kathmandu valley. Diagram of user system for connection and mv switchgear. Normally, a power system is designed so that the effects of an outage caused by the failure of a single component such as a transformer, transmission line, or distribution line will result in minimal interruption of service and affect the fewest customers possible. The one line diagram can be printed or exported to the pdf or dwg format either on a single drawing or in the form of folios. Single line diagram maine buses desktop design projects desk blue prints busses. To explain this easier, we have divided the single line into three sections. Distribution substations michigan technological university. Substation standards switching diagram operating numbers bus configuration 6.
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