A design layout of 233 kv, 200 mw substation the substation is connected with three substations or load viz. 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. 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. A standard designs transmission typical details for optical ground wire splice structures 110. B standard designs transmission lines typical details for dead end tees 109. Es000905r105 safety in design distribution design quick reference guide. They range from the very large to the very small see below for a guide. 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. This equipment is a compact multicomponent assembly, enclosed in a ground metallic housing, which the primary insulation medium is a compressed gas. The different types of substations mainly include stepup type substation, stepdown transformer, distribution, underground distribution, switchyard, customer substation, and system station. Distribution substation an overview sciencedirect topics.
Lightning arrester the substation equipments such as conductors, transformers, etc. 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. Introduction the substations are important part of power system. Measurement of earth resistance three point method 18. 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. Important factors in design of distribution substations eep. Farmington center northwest region 37849 interchange dr farmington hills, mi 48335 phone. Substations a substation is a highvoltage electric system facility. Federal and state legislation has been introduced to reduce the output of carbon emissions into the environment. Distribution automation handbook prototype elements of power d istribution systems 1mrs757959 4 3 elements of power distribution systems 3.
Covers general issues related to site design, foundation design and control house design. 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. Normally stations are where we catch trains or buses. Introduction the sub stations are important part of power system. Factoryassembled, wired and tested, the turnkey power substation reduces costs, time, space and. This one hour course provides an introduction to the design of electrical distribution systems found in electrical power generation plants. The input for a distribution substation is typically at least two transmission or subtransmission lines. Fundamentals of modern electrical substations part 1.
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. Distributed photovoltaic systems design and technology. Distribution substation transformers change the transmission or subtransmission voltage to lower levels for use by endusers. The correct application of a minisubstation requires an appropriate design of a reticulation system. 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. Substation design volume ii physical layout table of contents. The continuity of supply depends to a considerable extent upon the successful operation of sub stations. The pre fab substation is assembled on a selfsupporting transformer skid or trailer, creating an easily transportable design that can be quickly energized. Depending upon the availability of resources these stations are constructed. 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. 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. Distribution substation is connected to a subtransmission system via at least one supply line, which is often called a primary feeder. 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. Subdivision definition a residential subdivision is defined as a tract of land divided into at least 10 lots for singlefamily residences.
Company for the work which has made it possible to put this revision of the design guide together. 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. 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. 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. Requirements for installation of underground electric. What is a electrical substation definition, layout, and. 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. General specification for the civil engineering and building. Whenever light surges occur then, a highvoltage pass through these electrical components causing damage to.
Draft may 29, 2015 sean jessup, pe dan dolan, pe final july 20, 2015 sean jessup, pe dan dolan, pe. 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. 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. 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. Distribution substation design must be a combination of reliability and quality of the power supply, safety, economics, maintainability, simplicity of operation, and functionality. We take a comprehensive approach to developing your substation project, applying our broad experience with and understanding of power industry infrastructure. 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. An electricity supply undertaking generally aims at the following. Electrical power substation engineering and layout. Regional centers areas for clusterregion northeast region northwest region southeast region southwest region regional center locations. The ergon energy design philosophy is to provide substations.
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. Annexure i lay out plan of substation cum fire pump house independent building 115 115 17. Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. 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. All rus borrowers rus electric staff effective date. Annexure i lay out plan of sub station cum fire pump house independent building 115 115 17. Distribution substations are located near to the endusers. 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. It is used to switch generators, equipment, and circuits or lines in and out of a system. Engineering design standard eds 073101 predesign requirements for secondary substations networks. Distribution voltages are typically medium voltage, between 2. Eds 073101 predesign requirements for secondary substations. This type of substation gets the power supply from a near producing facility. The type of equipment utilized in the electrical distribution systems is discussed in terms of its design, function, role and backup capabilities.
Modular substation prefab substation transformer skid. Electrical substations have the following mission to accomplish. 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. Substation, switchgear and equipment maintenance and testing. Substations equipment maintenance electric power systems.
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. Jul 28, 20 earth resistance value major power station 0. Covers the design of the ground grid for safety and proper operation. Maximum possible coverage of the supply network over the given. Power transformers circuit breakers disconnecting switches station busses and insulators. T, falling to half this in an average distance of 1.
It includes information obtained from extensive research of current literature on the subject and preferred practices based on practical experience. What is distribution substation and its main components. Offshore substation design development of standards. The senior design team will design both parts of the project including the solar layout, substation layout, and associated deliverables. Design of an ultra compact distribution substation p. South african national standard miniature substations for. Framework for design and planning for low voltage housing estate installations and associated, new, hvlv distribution substations. Design service area map satellite location location for. For fulfilling these huge power demands the modern time requires creation of bigger and bigger power generating stations. Ehv and hv substations are usually installed outdoors with the equipments seated at metal or concrete structures. Framework for design and planning of industrial and commercial underground connected loads up to and including 11kv. 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. Eaton s modular integrated transportable substation mits is an ultraflexible modular substation solution designed to your specific needs.
This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. The substation design manual is not intended to replace asset management standards, but rather. By the same analogy we can explain what a substation does. Distributed photovoltaic systems design and technology requirements chuck whitaker, jeff newmiller, michael ropp, benn norris prepared by sandia national laboratories albuquerque, new mexico 87185 and livermore, california 94550 sandia is a multiprogram laboratory operated by sandia corporation. These power generating stations may be hydroelectric, thermal or atomic. This paper presents a new architecture of distribution. A distribution substation transfers power from the transmission system to the distribution system of an area.
Elevation layout, earthing grid, earthing grid design, dslp direct stroke lightning protection, dslp design, opgw cable, distribution substation and substation design 1. In newer developed areas, residential and commercial distribution is. Annexure ii lay out plan of substation with dg set 116 116 18. Engineering design standard eds 073101 pre design requirements for secondary substations networks. The substation receives electrical energy directly from generating stations through incoming power supply lines while it delivers electricity to the consumers. Safety of life and preservation of property are the two most important factors in the design of the substation. Substations are where electricity lines are connected and switched and where the voltage is changed by transformers. Modular substation prefab substation transformer skid eaton. Supply of required electrical power to all the consumers continuously at all times. Substations play a critical role in how you safely deliver reliable and affordable power, power transmission and distribution, generation interconnection, switching or acdc conversion.
Covers the design of bus support structures and connectors. General specification for the civil engineering and. South african national standard miniature substations for rated a. Mean magnetic fields close to the perimeter fence were about 1. Electrical substation now days the electrical power demand is increasing very rapidly. A short quiz follows the end of the course material. Electrical substations can also be divided into public and private substations. Distribution substations michigan technological university.