Switching and reconfiguration events typically will use a more complex method of reliability assessment than those used to look at a single substation design, this paper will concentrate on determining the reliability of. Distribution substation is connected to a subtransmission system via at least one supply line, which is often called a primary feeder. The different types of substations mainly include stepup type substation, stepdown transformer, distribution, underground distribution, switchyard, customer substation, and system station. Annexure i lay out plan of sub station cum fire pump house independent building 115 115 17. Subdivision definition a residential subdivision is defined as a tract of land divided into at least 10 lots for singlefamily residences. Part e building services and environmental design 600147 attention should be paid to the placement of sub stations and electrical mains as the former may provide a fire hazard, and both can adversely affect electrical and communications equipment. The continuity of supply depends to a considerable extent upon the successful operation of substations. Typical distribution voltages vary from 34,500y19,920 volts to 4,160y2400 volts. Electrical substations can also be divided into public and private substations. All rus borrowers rus electric staff effective date.
Factoryassembled, wired and tested, the turnkey power substation reduces costs, time, space and. When the space available for the installation of the substation is short or when the environmental conditions are extremely severe the usual solution is to install a gis gas insulated substation, which schematic diagram is shown in figure 3. Whenever light surges occur then, a highvoltage pass through these electrical components causing damage to them either temporary or. What is a electrical substation definition, layout, and. Framework for design and planning for low voltage housing estate installations and associated, new, hvlv distribution substations. Normally stations are where we catch trains or buses. Our engineers have completed substation testing and maintenance including power transformers, switchgear from 600 v to 35 kv, overhead and industrial switches, reclosers, relays, breakers and regulators for over 20 different utilities and industrial customers.
T, falling to half this in an average distance of 1. A design layout of 233 kv, 200 mw substation the substation is connected with three substations or load viz. Distribution substations michigan technological university. 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. Substation, switchgear and equipment maintenance and testing. For fulfilling these huge power demands the modern time requires creation of bigger and bigger power generating stations. Electrical substation now days the electrical power demand is increasing very rapidly. Eds 073101 predesign requirements for secondary substations. Substations play a critical role in how you safely deliver reliable and affordable power, power transmission and distribution, generation interconnection, switching or acdc conversion. The senior design team will design both parts of the project including the solar layout, substation layout, and associated deliverables. 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.
Distribution substation transformers change the transmission or subtransmission voltage to lower levels for use by endusers. Lightning arrester the substation equipments such as conductors, transformers, etc. National grid surveyed 25 final distribution substations in suburban areas in surrey in the 1980s. We take a comprehensive approach to developing your substation project, applying our broad experience with and understanding of power industry infrastructure. Requirements for installation of underground electric. Distribution substations are located near to the endusers. South african national standard miniature substations for rated a. Distribution substation an overview sciencedirect topics. General specification for the civil engineering and.
In particular, attention should be paid to faultcurrent interruption, which should be provided for by the appropriately rated fault interrupting switchgear in the minisubstation or elsewhere in the system. Company for the work which has made it possible to put this revision of the design guide together. Design service area map satellite location location for. Power transformers circuit breakers disconnecting switches station busses and insulators. But in nearly all cases, the highest field is usually produced by the lines and cables supplying the substation and not by the equipment inside the.
B standard designs transmission lines typical details for dead end tees 109. The distribution substation is an assemblage of equipment for the purpose of switching, regulating, and changing the level of supply voltage from subtransmission level to primary distribution level. However, it is typical for a distribution substation to be supplied by two or more supply lines to increase reliability of the power supply in case one supply line is disconnected. Substation design volume ii physical layout table of contents. Electrical substations have the following mission to accomplish. Distribution automation handbook prototype elements of power d istribution systems 1mrs757959 4 3 elements of power distribution systems 3. Annexure ii lay out plan of substation with dg set 116 116 18. Covers general issues related to site design, foundation design and control house design. Supply of required electrical power to all the consumers continuously at all times. Covers the design of the ground grid for safety and proper operation. Distribution substations distribution substations are usually characterized by voltages up to 230 kv on the primary side and on the low side the voltages are typically, 12.
Introduction the substations are important part of power system. Modular substation prefab substation transformer skid. May 15, 2018 electrical substation now days the electrical power demand is increasing very rapidly. South african national standard miniature substations for. Regional centers areas for clusterregion northeast region northwest region southeast region southwest region regional center locations. The correct application of a minisubstation requires an appropriate design of a reticulation system. These power generating stations may be hydroelectric, thermal or atomic.
In this example, an alternative connection is shown for the batterytocharger connection, and that alternative is preferred when sensitive digital systems are being fed or when there is a longer distance between the distribution panel and the batteries and charger. Dec, 2018 the electrical substation does not have a single circuit but is composed of numerous outgoing and incoming circuits which are connected to a busbar i. An electricity supply undertaking generally aims at the following. Important factors in design of distribution substations eep. Switching and reconfiguration events typically will use a more complex method of reliability assessment than those used to look at a single substation design, this paper will concentrate on determining the reliability of a substation not including system wide effects. It is used to switch generators, equipment, and circuits or lines in and out of a system. Engineering design standard eds 073101 pre design requirements for secondary substations networks. Draft may 29, 2015 sean jessup, pe dan dolan, pe final july 20, 2015 sean jessup, pe dan dolan, pe. In newer developed areas, residential and commercial distribution is. What is distribution substation and its main components.
Jul 28, 20 earth resistance value major power station 0. Substations equipment maintenance electric power systems. Electricity has to be transmitted over large distances as the place where the power is being generated and the place where it is consumed can be far apart. The ergon energy design philosophy is to provide substations. Design of an ultra compact distribution substation p. The input for a distribution substation is typically at least two transmission or subtransmission lines.
A distribution substation transfers power from the transmission system to the distribution system of an area. The substation design manual is not intended to replace asset management standards, but rather. Distributed photovoltaic systems design and technology. Framework for design and planning of industrial and commercial underground connected loads up to and including 11kv. The substation receives electrical energy directly from generating stations through incoming power supply lines while it delivers electricity to the consumers. A standard designs transmission typical details for optical ground wire splice structures 110. It also is used to change ac voltages from one level to another, andor change alternating current to direct current or direct current to alternating current. It includes information obtained from extensive research of current literature on the subject. The technical specification for the civil engineering and building design and construction of secondary substation or 2275400kv substation equipment enclosures that form an integral part of primary. It includes information obtained from extensive research of current literature on the subject and preferred practices based on practical experience. Measurement of earth resistance three point method 18. Distribution voltages are typically medium voltage, between 2. Ehv and hv substations are usually installed outdoors with the equipments seated at metal or concrete structures. Substations a substation is a highvoltage electric system facility.
Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. Substation types distribution substation located near to the endusers changes the transmission or subtransmission voltage to lower levels for endusers distribution voltages varies from 34,500y19,920 v to 4,160y2400 v blast and burn generally associated with fault current. Content includes the definition of a distribution channel, the steps in its design, functional discounting and margin allocation, the role channels play in branding, and recent trends. Modular substation prefab substation transformer skid eaton. Substations are where electricity lines are connected and switched and where the voltage is changed by transformers. Farmington center northwest region 37849 interchange dr farmington hills, mi 48335 phone. This one hour course provides an introduction to the design of electrical distribution systems found in electrical power generation plants. Annexure i lay out plan of substation cum fire pump house independent building 115 115 17. Covers the design of bus support structures and connectors.
Engineering design standard eds 073101 predesign requirements for secondary substations networks. The type of equipment utilized in the electrical distribution systems is discussed in terms of its design, function, role and backup capabilities. Standard for distribution line design underground check this is the latest version before use page 2 standard stnw3369 ver 2 ergon energy corporation limited abn 50 087 646 062 2 references 2. The pre fab substation is assembled on a selfsupporting transformer skid or trailer, creating an easily transportable design that can be quickly energized. By the same analogy we can explain what a substation does. Whenever light surges occur then, a highvoltage pass through these electrical components causing damage to. This paper presents a new architecture of distribution. This standard outlines the requirements for the planning of secondary distribution substations and customer substations metered at hv or lv, including selection and agreement of locations for substation sites. Elevation layout, earthing grid, earthing grid design, dslp direct stroke lightning protection, dslp design, opgw cable, distribution substation and substation design 1. Es000905r105 safety in design distribution design quick reference guide. Stepup and stepdown voltage transformation connection of separate transmission and distribution lines into a system to increase efficiency and reliability of power supply sectionalizing of power system to increase its reliability and operational. Fundamentals of modern electrical substations part 1. Offshore substation design development of standards. Mean magnetic fields close to the perimeter fence were about 1.
It is uneconomical to directly connect electricity consumers to the main transmission network, unless they use large amounts of power, so the distribution station reduces voltage to a level suitable for local distribution. Stepup and stepdown voltage transformation connection of separate transmission and distribution lines into a system to increase efficiency and reliability of power supply sectionalizing of power system to. Electrical power substation engineering and layout. Eaton s modular integrated transportable substation mits is an ultraflexible modular substation solution designed to your specific needs. Maximum possible coverage of the supply network over the given. Depending upon the availability of resources these stations are constructed.
The electrical substation does not have a single circuit but is composed of numerous outgoing and incoming circuits which are connected to a busbar i. Distribution substation design must be a combination of reliability and quality of the power supply, safety, economics, maintainability, simplicity of operation, and functionality. The continuity of supply depends to a considerable extent upon the successful operation of sub stations. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. In order to address the subsequent need for clean power, there. Annexure ii lay out plan of sub station with dg set 116 116 18. A short quiz follows the end of the course material. This equipment is a compact multicomponent assembly, enclosed in a ground metallic housing, which the primary insulation medium is a compressed gas. This type of substation gets the power supply from a near producing facility. Safety of life and preservation of property are the two most important factors in the design of the substation. They range from the very large to the very small see below for a guide.