Medium voltage kiosk substation - Schneider Electric

KPXTMrangeMedium voltage kiosk substationReliable, safe and smart solutions for distribution networks

A history ofInnovation21976 Transformer manufacturing startedin Benalla , Victoria1976 First prefabricated (kiosk) substation1995 First kiosk design with oil containment2000 First kiosk (KPX) designed to internationallyrecognised standard IEC 13302006 First type tested Internal Arc proofkiosk developed in Australia2008 A fully integrated automation,monitoring and control system forthe kiosk application introduced

Innovation leaderfrom the beginningHigh voltage / low voltage (HV/LV) outdoor prefabricated(kiosk) substations have been largely used for more thanthirty years, initially in Europe then gradually in othercontinents. Schneider Electric was first to introduce theprefabricated substation concept in 1976.Prefabricated substations are defined as an enclosurecontaining transformers, low voltage and high voltageswitchgear, connections and auxiliary equipment tosupply low voltage energy from a high voltage system orvice versa.In 1995 the first International Standard prescribingthe operating conditions, characteristics, generalrequirements and testing methods applicable toprefabricated substations was published by theInternational Electrotechnical Commission (IEC) as IEC61330. It was adopted by Standards Australia asAS 61330. In 2008 this standard was superseded byAS 62271.202.The first prefabricated substation in Australia tosuccessfully pass a type test for personnel protectionfrom internal arc faults to AS 62271.202, wasmanufactured in Schneider Electric’s Benalla factory in2007. This was followed by successful testing of a RingMain Unit (RMU) outdoor enclosure in 2008.Schneider Electric continues to design prefabricatedsubstations at the highest level of safety for the operatorand the public.KPX prefabricated kiosk substation3

OurachievementsInnovative solutions that work for youOur kiosk offer underscores Schneider Electric's knowledge in electricaldistribution and automation, providing economical solutions for a largerange of applications.Unique kiosk designWestern Power initiated a review of theirRing Main Unit (RMU) specification andkiosk design to easily allow for upgrades,achieve the highest standards for staffand public safety relating to internal arcfaults and enabled remote control andmonitoring. Western Power prepared aRMU specification for tender in whichSchneider Electric was successfulconditional upon completion of design andtype testing of a unique kiosk and supportstand, to meet their requirements andthose set by Standards Australia.Schneider Electric worked closely withWestern Power to understand their needsand deliver a robust solution. The resultwas a unique kiosk design meeting InternalArc Classification Type AB to house theRemote Terminal Unit (RTU), vandal proofantenna and AC supply terminal box.Western Power’s Distribution UndergroundSystems Team Leader, Sandeep Magansays:“The subsequent collaborative approachhas allowed Schneider Electric’s initialproduct offering to evolve and has ensuredgreater value for Western Power.""We put safety first so it was extremelyimportant that the kiosk design was typetested to meet AS62271:202 Internal ArcClass Type A (safety of operator) and TypeB (safety of public) tests. Schneider Electricwas able to deliver a successfully typetested kiosk design housing the RMU andRTU, making it the first design of its kind inAustralia.”4

Our innovative solutionshelp you make the mostof your energyInternal arcKiosk substations contain electrical equipment, often located ina public environment, requiring them to meet the highest safetystandards.An internal arc rated kiosk substation design is manufactured towithstand the extreme pressure and force generated during aninternal electrical fault.The risk of equipment failure in a kiosk substation is minimisedthrough the design. In the rare occasions of medium voltageequipment failure, an internal arc rated kiosk design minimises therisk of injury to nearby public or an operator working with the kioskdoor open.The design ensures that extremely hot gases generated during a faultare cooled via a patented filter, reducing the effects of overpressureand flame within the enclosure. The design limits the release ofprojectiles and flaming particles, which could potentially injure thepublic, operators or start bushfires.Schneider Electric has invested in safety studies over the yearsto provide the safest possible solutions for our customers andgeneral public.Our new KPX 2 and RMU kiosk designs are type tested to ensurepersonnel and operator protection against internal arc faults, as perAnnex A of Australian standard AS 62271.202. They have an internalarc classification of IAC-AB and are rated to withstand an internal arcfault of 20kA for 1s.EnvironmentA kiosk substation should be designed to ensure internal connectionsare protected from extreme environmental conditions, such as hightemperatures, rainfall, dust and wind. Schneider Electric’s rigoroustesting and graphic modelling ensures proper ventilation, protectionagainst incoming water, sealed connections and secure locked doors.The KPX kiosk design not only protects against the environment,it also helps to protect the environment. All our kiosk substationsincorporate the option of full transformer oil containment. If thetransformer leaks oil, there is no risk to the environment, as the oilis contained inside the kiosk. This feature is extremely importantfor applications close to water catchment areas to avoid possiblepollution.At the end of the kiosk life cycle our service offer makes sure that allmaterials are handled with respect of environment.Internal arc test as per AS62271.202Arc protection, oilcontainment andnetwork intelligenceavailable in the samereduced footprint.5

Wind farm solutionsThe initial design of a wind farm can have profound implications for its futureprofitability. Once a site has been identified and a decision taken to invest in itsdevelopment, the wind farm design process begins. The fundamental aim is tomaximise energy production, minimise capital and operating costs, and stay withinthe constraints imposed by the site. The kiosk substation for wind farms requires thefollowing considerations:Environment(oil containment)The environment surrounding the wind farmneeds to be considered. The KPX kiosk hasthe option for full transformer oil containment.If the transformer develops a leak, there isno risk to environment, as the oil is fullycontained inside the kiosk. This feature isextremely important for applications close towater catchment areas to avoid possiblepollution.Wind resistant(smaller locked doors)Due to the location of wind farms, the kioskenclosure design needs to withstand highwinds. To reduce effect of the wind and toincrease safety for the operators, the KPXwind farm kiosk has smaller doors, increasedsteel thickness and sturdy captive door stays.Harsh environment(aluminium enclosure)Wind farms are typically located in harshenvironments such as wind swept elevatedhills and coastal locations. Aluminiumenclosures are available to prolong the lifeof the kiosk.Connection to grid(step up transformer)Because of lengthy distances between thewind turbine towers and the main substationswitchyard, the power is transmitted at highvoltage. Typically, the power from each of the690V turbines is stepped up to 22kV or 33kVthrough a transformer. The higher voltagereduces the power losses and cablingexpenditure due to smaller cable sizes.6

Electrical utility solutionsFor electrical utilities, long black out periods and voltage fluctuations are todayunacceptable. Their primary needs include safety of supply and continuity of service,due to increasing pressures from the mandatory measurement of customer serviceand customer expectations.Service level(remote control)To reduce the duration and frequency ofpower outages, a system of remote controlis required. Key elements of an intelligentdistribution system include Remote TerminalUnits (RTU), motorised Ring Main Units (RMU)and Fault Passage Indicators (FPI). KPXkiosks designs can house the motorised RMU,RTU, FPIs and vandal proof antenna withoutincreasing the footprint of the enclosure.Efficiency and optimisation(remote monitoring)Monitoring the network helps to improveefficiency and quality of supply. KPX has arange of solutions to measure the power onboth the HV and LV sides of the transformer.This information can then be communicatedback to the control room on a variety ofdifferent methods.Safety of operators(internal arc tested design)If an internal arc fault occurred in theHV switchgear, the effects of such an eventmust take into consideration the safety ofthe public and operators near the kiosk. TheKPX 2 and RMU kiosk designs are type testedto ensure personnel and operator protectionagainst internal arc faults, as per Annex A ofAustralian standard AS 62271.202.7

Defence solutionsDefence substations differ from those provided by electrical utilitiesas typically they also form part of the emergency power distributionsystem and contain control and communications equipment neededto effectively distribute and control emergency power.Expected life span is 50 years(maintenance and inspection)A typical defence specification requires that kiosks are designed andinstalled to operate continuously at full load with a design life of 50years. This design life is to be achieved with minimal maintenance. Thekiosk equipment and enclosure must be selected and manufacturedwith the necessary corrosion protection to achieve this requirement.Harsh environment(increased IP rating)The kiosk must be designed to operate continuously at full load atextremes of temperature, humidity and environmental conditionsapplicable for the installation location. Hence the degree of protectionof defence kiosks is typically higher than those normally required.Energy availability(remote SCADA connection)The Defence Engineering Services Network(DESN) is a control and data acquisitionsystem generally consisting of networkeddata gathering points and a central operatorinterface. The system monitors and/orcontrols various engineering services butparticularly the electrical power systems.Typically, intelligent metering with integralcommunications, measuring current, voltageand power, is required on the HV and LVsupplies.8

Industrial solutionsReliability of supply for industrial customers is critical. A power outage can costmillions of dollars depending on the type of industry. Their primary needs includequality of supply, energy efficiency and continuity of service.Quality of supply andenergy efficiency(embedded power meters& Power Factor Correction)Monitoring the network helps to improveefficiency and quality of supply. You canmeasure harmonic pollution, determinewhere extra capacity exists, identify overloadedequipment and balance loadson substations, switchboards and otherpower equipment. By optimising yourelectrical system, you extend the life of yourinstallation. KPX has a range of solutionsto measure the power on both the HV andLV sides of the transformer. Power FactorCorrection capacitors can also be includedwithin the kiosk.Continuity of service(circuit breaker protection)If a feeder is lost or a circuit breaker trips,re-establishing supply quickly is critical.This can be achieved using voltage sensors,current sensors and a control unit to transfersupply from one feeder to the other orreclose the circuit breaker. All this intelligencecan be incorporated in a kiosk substation.Carbon footprint(transformer losses)Since 2004, 11kV and 22kV distributiontransformers, up to 2.5MVA, have to meetMEPS (Minimum Energy PerformanceStandard) regulations as per AustralianStandard AS 2374. To decrease yourcarbon footprint further, higher efficiencytransformers complying with Table 3 of AS2374 are available in KPX. Transformer lossesare at minimum when the transformer runsat nominal load. Transformer losses willincrease rapidly when it is run at overloador under load. Remote monitoring of thetransformer allows you to maintain optimumtransformer load and manage a transformerupgrade in a planned manner.9

Monitoring andprotecting your networkGPRSGSM / PSTNEthernetDistribution networkmanagement andautomation system isthe quickest and mosteconomical way toimprove SAIDI and SAIFIfigures.UndergroundEnsuring power availabilityat any timePower supply interruption is unacceptableespecially in critical applications, anautomatic system is required for mediumvoltage source transfer.For peace of mind, RM6 enables automaticcontrol and management of power sourcesin your medium voltage distribution networkwith a short transfer time (less than 10seconds), guaranteeing high reliability ofyour installation.Smart kioskEnhancing your networkprotectionBy choosing Sepam 10 Protection Relays,you add communication to protectionbenefitting from the high reliability of adevice that provides:>>very sensitive earth fault protection,>>specific protection (thermal overload:49RMS),>>load monitoring.Easergy L500Manage your networkwithin a few clicks.Focus investment onnetwork instrumentation:Preconfigured SCADA,for Easergy devices, basicSCADA with just enoughfunctions to manageEasergy devices data,not more.Combining our kiosks with remotemonitoring and control from the Easergyrange, will help you to reduce outage timesand significantly improve your service qualityand continuity of energy supply. Moderncommunication infrastructure ensures thatyour network management system canbe set up step-by-step according to yourinvestment plan, gaining benefits from thestart. Well planned and designed loopautomation systems ensure that the majorityof your customers can be reconnected tothe network during the first minute after anoutage occurs.KPX 2 with remote control and monitoring10

Smart GridSmart Grid is the term used to describe a combination of smart devices in adistribution network which work collaboratively to collect information to manage yourdistribution network, ensuring a high level of service continuity to the end user.The MV/LV distribution substation (Smart kiosk) has akey role to play in a modern smart distribution system.Well designed and planned remote monitoring, controland automation functions help you significantly improveyour System Average Interruption Duration Index (SAIDI),and System Average Interruption Frequency Index (SAIFI)figures and balance your loads.Smart kiosk is an independent functional unit withoutthe need for continuous communication between thesubstation and upper management system. At the sametime, to be utilised as a data concentrator for your smartmeter network. As the majority of end user meters areonly a few hundred metres away, it is possible to choosebetween several communication infrastructures.Key functions for a Smart kiosk include:> Monitor transformer overloads> Advanced transformer protection> Communication with distributionNetwork SCADA> Fault passage indicator on the MV network> Monitor and control the MV switchgear> Recording of events and alarms> Local network communication> Data concentrator> LV Energy measurement in four quadrants> LV diagram of loading by phase> Monitor the LV voltage imbalances> Monitor the LV quality of service> Monitor the smart meter> Control and management of public lighting11

A choice of innovativesolutions to meet all yourapplicationsRMU outdoor enclosureKPX 2KPXA choice of Automatic Transfer Systems to increase power availabilityATS 1/2On loss of voltage on L1,the Automatic TransferSystem automaticallyswitches to L2.KPX 2 with remote control and monitoringSchneider Electric (Australia)Schneider Electric (NZ)Head OfficePostal Address:Locked Bag 5500Baulkham HillsNSW 2153 AustraliaAustralia WideTel: 1300 369 233Fax: 1300 369 288www.schneider-electric.com.auhelp@au.schneider-electric.comHead OfficePostal Address:PO Box 15355New LynnWaitakere 0640,Auckland,New ZealandNew Zealand WideTel: 0800 652 999Fax: 0800 101 152www.schneider-electric.co.nzhelp@au.schneider-electric.comAs standards, specifications and designs change from time to time, always ask for confirmation of the information given in this publication.Printed with vegetable oil-based ink on Mega Recycled Silk, an environmentally considered sheet consisting of 50% post consumerrecycled waste and 50% FSC certified fibre. Mega Recycled is manufactured at the Gohrsmuhle Mill, who have their own waste watertreatment plant and are ISO 14001 EMS approved. Mega Recycled is made elemental chlorine free.AMTED1280809AU