PACiS®

Protection, Automation & ControlIntegrated Solution

SCALABLE SOLUTION

PACiS is a scalable solution in terms of its functions, architecture and services thereby enabling the right investment at the right time while making full use of existing resources. For example, PACiS might initially be restricted to simply monitoring various signals – and then be extended to encompass new and fast distributed automation over several hundred kilometers.

DEDICATED TO POWER AUTOMATION

PACiS is much more than a general purpose automation technology. Electricalsecurity, outage minimization or topology-oriented automation are some examplesof the design features that have governed the development of PACiS. Completeintegration between devices is achieved through a full use of the substation-specific communication protocols, ensuring full and optimum use of information.

HIGHER STANDARDIZATION LEVEL

PACiS provides smooth migration to new communicationstandards such as Ethernet TCP/IP/UCA2 and IEC 61850.Beyond its pure communication features, PACiS helps with thestructuring of standard schemes such as standard bays – a keyrationale for the optimization of medium term investments.Similarly, the ability to increase system availability through 24/7maintenance is a major contribution to a higher standard forpower automation.

Energy Automation

& Information

Improving competitiveness and performance is key to any business. New solutions must be developed to optimize the assets, benefit from the latest technology capabilities and adapt to the rapidly changing environment.

T&D offers complete solutions for the entire energy chain, from the primary equipment up tothe market management software.

PACiS is the latest generation of Power Automationsolutions. It can be tailored to a single substation,as usually found within utilities. Or it may bring a unified and optimal scheme for the various substations, together with generation sources and possible load shedding as encountered in industrial or infrastructure applications.

PACiS provides the power to re-think the design,operation and maintenance of electrical installations.

Customer benefits• Scalable solution • Dedicated to

power automation • Higher standardization level

T&D

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2>3

> Monitoring & Analysis

PACiS’ base function includes the monitoring of anydata collected by the system, either locally or remotely.

Extremely compact monitoring can be achieved on an embedded graphical LCD, displaying single line diagrams, alarms, measurements and sequence of eventlists. This is a particularly cost-effective answer to smallsubstations, for instance.

More sophisticated monitoring is carried out via one ormore PC screens, providing additional benefits such asbusbar coloring for easier maintenance, advancedalarm screens and accurate fault localization within thesystem. Other features include advanced reporting,dual language display, disturbance record analysis, etc.

SCALABLE FUNCTIONAL SCOPE

> Federation

PACiS first key feature is to federate information coming fromvarious sources in order to further create value out of them.

The sources of information are physical devices deliveringpure electrical information (such as a 50/60 Hz currenttransformer) or connected by serial communication links(especially when re-using existing devices already instal-led in the field, though not confined to this application).Alternatively, the source can be one or more operatorscarrying out maintenance, operation or management ofthe process or the system itself.

PACiS manages several types of data: positions,controls, measurements, disturbance records, setting,etc. Depending on the source and type of communicationnetwork this information may be allocated a quality tagsuch as time, validity, etc. Each item of qualified data isuniquely referenced in the system configuration tool inorder to ensure full consistency of the information, as wellas allowing it to be re-used in various parts of the system.

PACiS handles several types of communication protocolsused in substations and industrial plants. Performance of the application is highly dependent onthe choice of the protocol, including speed (300 bps to100 Mbps), services (master-slave vs. client-server) or communication objects.

PACiS®

Protection, Automation & Control Integrated Solution

Bay, voltage level, substation or site:

PACiS offers scalable solutions to suit

precise needs.

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> Control

Controls are initiated by the operator, locally or remotely,and multiple checks are performed before the issue of acontrol signal in order to make it fully secure. For instance,a check can be performed to determine whether a singlecontrol is effective at a time on the whole system or ona single device (configuration dependent).

Another example is the use of interlocks, which aremade by logical equations or are the result of a dynamictopological analysis coupled with expert rules.Interlocks are managed as close to the process as possible in order to give the best security of operation.Interlocking conditions are graphically displayed on theoperator’s screen in order to immediately identify thelocking conditions (if any) and make the appropriatechanges before issuing the order.

Each manual control is part of “Select Before Operate”sequence, where several options can be chosen. Thisincludes the use of a synchro-check (in coupling or closing mode), the bypass of syncho-check or interlockconditions (providing that a correct user’s authorizationis given).

> Automation

Distributed automation between different devices, whether in the same substation or in different sites, islikely to become one of the key changes in the future.New arbitrages between costs and dependability canbe quickly achieved through the use of fast Ethernetcommunication protocols (UCA2/IEC61850), which notonly replace traditional wiring with no extra hardwarebut also carry more detailed data for better-informeddecisions.

PACiS acts as a powerful automation platform:

> Standard design using a comprehensive IEC 61131-3editor accessing most of the system data,

> Event driven processing (no cycle time) with inherentrobustness for avalanche conditions,

> Fast (100 Mbps Ethernet collision free) peer-to-peercommunication between physical devices

PACiS provides additional in-built libraries of automationmodules including a full range of protections, feederautomatic recloser and voltage regulation of parallel transformers.

> Configuration

System configuration definition is an essential tool for theinitial database design and also for the evolution of thesystem throughout its lifetime. Its purpose is to provide aconsistent set of information references distributed withinthe various components of the system.

PACiS System Configuration Editor (SCE) provides anextremely efficient way to create a database, thanks toits unique object-oriented approach. The use of polymorphlibraries, combining electrical data, automation sequencesand graphical representation, simplifies and strengthensthe design of the PACiS solution.

Importing or exporting XML files can further enhance dataconsistency with engineering tools from other systems ordevices. Use of the UCA2/IEC 61850 standards naturallyleads to the use of hierarchical and process-oriented datareferences. This is a key criterion for overall engineeringcost reduction and interoperability success. PACiS SCEincludes advanced utilities for the end user, including simplecomparison between database versions, topological editorand filtering of expert data for the non specialist.

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PACiS offers optimum solutions for new sites or retrofit schemes based on centralized,

distributed or mixed architectures4>5

> Administration

PACiS System Management Tool (SMT) is a tool fortransparently downloading the databases to the devices.Up to two databases can be managed by each device(device dependent) in order to minimize outages duringa system extension or modification.Consistencies between database versions are dynamicallychecked between clients and servers when initializingthe connection in order to secure consistent behavior ofthe distributed system.

PACiS provides tools to display the versions of the component software and database, the result of theirhardware self-check and the status of their software.This is accessible locally or remotely and greatly facilitatesthe maintenance of the system.Simulation tools are also included: UCA2/ IEC 61850clients and servers can be simulated with full interfacingto the system configuration tools. These tools are usedwhen the devices are already partially installed on site.

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SCALABLE ARCHITECTURE

> Unified framework

PACiS offers a unified architectural framework for buildingmultiple solutions tailored to the real needs of the application.It allows progressive upgrading of the system designaccording to the user’s new requirements in term of functions,size, performance, etc.

A single engineering tool is used to link together the varioushardware and software components logically, whether thesystem is physically centralized (as per conventional RTU practices) or fully distributed (within a substation orbetween substations).

> Communication networks

Physical communications between components are basedon two main technology families in order to cope withvarious application performance needs, re-use of existingdevices and integration of third-party equipment.Master-slave communication is the legacy technology. It isgenerally based on slow speed lines, linking a substationwith a remote control center or a protection relay with asubstation computer. PACiS supports several protocols inorder to interface existing devices and can be fully integratedwithin a remote control scheme.

State-of-the-art communication technology is based on client-server and peer-to-peer links. It relies on fastEthernet networks and offers new perspectives in terms of distributed functions, performances and flexibility. It enables innovative automation schemes and flexible additionof new application clients.

> Legacy protocols

Communication with legacy devices in a substation canbe achieved natively using DNP3, MODBUS or IEC60870-5-103 protocols. Essentially, it is used to transferreal time data such as status, measurement or control.When using MiCOM devices the same link may be usedto retrieve settings of disturbance records transparently.

Communications with remote control centers are makingincreasing use of DNP3, IEC 60870-5-101 or IEC 60870-5-104 protocols. PACiS also supports a comprehensiveseries of older protocol generations such as GI 74, WISPand HNZ.

> Ethernet technology

PACiS relies on standard Ethernet communicationinfrastructures. Switched Ethernet is the preferred choicesince it eliminates collisions over the network. The possiblelatency time of the network itself becomes negligiblewith regards to the equipment response time, so the system determinism is primarily dependent on the choiceof the devices.

MiCOM H range Ethernet switches are dedicated,robust devices designed for the substation environment,or they may be fully integrated as a board within MiCOM devices for a more compact solution. They enable various topologies ring, star or mix with the possibility of a redundant communication path forincreased availability.

In terms of protocols, PACiS currently supports UCA2,while IEC 61850 developments are on going in line withthe development of the standard. UCA2/IEC 61850benefits from a rich implementation, taking full advantageof this technology and maximizing the capacity for inter-operability. Pass-through (transparent) facilities for legacyprotocol settings (for instance) are also provided.

> System availability

System availability results from the combination ofarchitectural choices and system software capabilities.PACiS accommodates a variety of redundancies, rangingfrom the switch redundant power supply to the entireredundancy of each component, including configurationdatabase redundancy.

PACiS can be made from a few integrated devices or have its functions split into several devices, thus offering a balance between functional availability, costand compactness.

In addition to the self-checks provided by each device,PACiS offers a variety of system test modes, such asdevice maintenance management or data forcing, tofurther increase the overall availability.

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6>7

Base Architecture

DNP3IEC 60870-5-101/104

UCA2/IEC 61850

DNP3IEC 60870-5-103/101

MODBUS

RTU/PC

IED IED IED

Typical applicationsDistribution substationWindfarmTransmission bay

Full Architecture

DNP3IEC 60870-5-101/104

UCA2/IEC 61850OPC

DNP3IEC 60870-5-103/101

MODBUS

IED

RTU/PC

100 Mbps Fast Ethernet UCA2/IEC 61850

IED

OI

IED

IED

RTU/PC

Typical applicationsTransmission substationIndustrial & InfrastructureEnergy distribution

> Full architecture

The full architecture is made of an Ethernet network linkingcomponents from the base architecture, Operator Interface(OI) and IEDs.

The Ethernet network might be local to a substation,typically for a transmission application, or it may inter-connect dispersed sites such as are commonly found inindustrial or infrastructure applications.

The client-server communication exchange avoids anycentral point between local and remote control (asfound on the base architecture) and facilitates a tailoredredundancy of client and/or server.

The Ethernet’s high throughput suppresses transmissionbottlenecks encountered with the legacy protocols. Thisalso enables use of the same physical link to superimposeadditional applications such as remote access to IEDengineering tools for improved maintenance.

> Migration facilities

Using the full architecture is a typical way to convert anexisting installation to new technologies in a progressivefashion. The legacy system becomes a slave to aUCA2/IEC 61850 converter, and new devices are thenplugged into this network.

> System extendibility

The PACiS solution can be contained within a single standard panel or be spread over hundreds of miles,depending on the application distribution.

PACiS’ architecture is structured in a series of hierarchicallevels. Each level maintains a given performance in termsof transmission time, automation and dependability, independently of the other levels. It therefore ensures thatthe system can be extended consistently and securely.

> Base architecture

PACiS base architecture interconnects a Remote TerminalUnit (RTU) or a PC with a series of Intelligent ElectronicDevices (IEDs) such as protection relays or measurementcenters through legacy communication protocols. Thismaster-slave architecture will typically be used within asimple distribution substation, a windfarm or a transmissionsubstation bay (a feeder, for example).

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> MiCOM range

PACiS is fully open to the integration of third-party devices so that existing devices in the field can beaccommodated, as well as user’s preferences, etc.Strict tests are performed in order to validate the functionalinter-operability limits precisely, retrieve status andmeasurement, control capabilities, retrieve disturbancerecords, remote settings and remote download of databases.

> Communication Devices

The PACiS range includes communication devices thatare dedicated to the substation environment. These include:

> Protocol converter, linking legacy IEDs or control center masters. These might eventually be integratedwithin modern IEDs (typically a bay controller) or in theOperator Interface PC.

> Ruggedized MiCOM H range Ethernet switches,optionally integrated in the MiCOM Computers, are DC or AC powered and fully resistant to electro-magnetic constraints. Scalable models, in terms ofredundancy, physical medium and performance areavailable. They permit the design of a star, loop or mix topology according to the constraints of the site’s civil works.

In addition, PACiS offers integration with off-the-shelfcomponents such as modems, GPS receivers and fiber optics.

PACIS COMPONENTS

> Intelligent Electronic Devices

A typical PACiS solution is likely to integrate severalIntelligent Electronic Devices (IEDs), such as protectiondevices, measurement centers, bay controllers, etc.communicating with the rest of the system by one ormore protocols.

PACiS is designed for optimum coupling with theMiCOM IED range.

PACiS takes advantage ofmodern intelligent electronicdevices, leading to a higher level of standardization.

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> Graphical user interface

A state-of-the-art graphical user interface is integratedinto the PACiS solution. This provides efficient and secure access to informationand archives, tailored to the substation environmentand the end-user’s specific requirements.

Key modules include:

> Real time display: Single line diagrams, System component status, Alarms, Sequence of events.

> Specific control windows include: Select before operate sequences, Interlock conditions representation, Synchro-check permission.

> Archives and reporting.Further modules can be added on the same PC: theseinclude analysis tools such as a disturbance analysisviewer, IED setting tools (for transparent access toMiCOM IEDs) and engineering tools (see next section).

8>9

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> System engineering tools

The three families of engineering tools at the heart ofPACiS make this a robust system-oriented solution,rather than just a collection of boxes.

PACiS System Configuration Editor (SCE) enables thedesign of customers’ database solutions.

Complete consistency of information addresses isensured between application modules located into oneor more devices. For instance, the status of a circuitbreaker that is used in automation, graphical and wiringapplications will only be referenced once. This is thanksto a powerful object-oriented approach, matching the substation environment rules and standardimport/export facilities.

PACiS System Management Tool-SMT is used to downloadthe configuration databases to the different devices andcheck consistency of versions. This is especially importantin a distributed system, since the databases are expectedto change several times during the life of the system andinconsistency may lead to side effect problems.

PACiS Equipment Simulator (ES) reproduces a missingor existing device, or group of devices, to test any useraction or automation procedure before running on site.

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> Standard Schemes

Components may be assembled within one or morepanels according to the required electrotechnical arrangement for instance, all the IEDs needed for theprotection and local control of a transformer or an EHVfeeder may be housed in one panel. Connectors, securityswitches, test facilities and internal arrangements forIEDs are defined as per the user’s practices.

The combination of modern, multi-functional and highly programmableIEDs, together with the fast peer-to-peer communication facilities,greatly improves the capabilitiesfor producing a “standard bay”. Astandard bay is a product made ofstandard hardware, software andengineering libraries (automation,graphical representations, wiringinterface, IEDs composition). It isthen customized to the exactrequirements of the project simplythrough changes to the database.

The concept of the standard bayprovides a mechanism for higherlevels of standardization of anyinstallation with limited purchasingeffort, reduced lead times andimproved maintenance.

The standard bay principle can further be used as a stepbetween a full control system and pure IED approach –perhaps for spreading investment during a partial retrofitof existing sites:

The standard bay is equipped with a UCA2/IEC 61850interface, but is still connected to the RTU with a parallelinterface.> The Ethernet link is then commissioned and used for

remote maintenance.> The standard bay becomes part of a full control system.

A similar approach can be conducted in other areas:> At a substation level, typically for H-type distribution

substations. > For a distributed automation within an industrial site

or large infrastructure, such as used for load sheddingor re-energisation.

10>11

PACiS®

Protection, Automation & Control Integrated Solution

Standard bay

Standard bay

Standard bay

EAI#3-PACIS 15/01/04 18:25 Page 11

• Standard bays for the transport network:each bay is composed of a series of panelsall containing protection, measurement andcontrol devices, and offering a UCA2/IEC61850 interface

• An integrated protection and control systeminterconnecting bays via a redundant 10/100 Mbps Ethernet optical ring for the transport network

• RTU connected with protection for distribution substations

• Compact pre-engineered systems for a typical windfarm

• Automation and interconnections of all the substations related to a railway line

>> PROJECT EXAMPLES

SCALABLE ENGINEERING

PACiS is designed to enable local engineeringthroughout the lifetime of the system. Specification,database configuration, panel design, test, training andmaintenance are carried out by T&D, the end-customeror a T&D partner. The optimum solution is defined on aproject basis, usually mixing the three types of skills.

Prior to the project, T&D experts can provide assistanceto make the best use of the available technologies, forinstance by helping the end user optimize the distributedautomation features of the new PACiS solutions.

EAI#3-PACIS 15/01/04 18:25 Page 12

• SOUTH EAST ASIA

Tel.: +65 67 49 07 77 - Fax: +65 68 41 95 55• PACIFIC

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Our policy is one of continuous development. Accordinglythe design of our products may change at any time. Whilstevery effort is made to produce up to date literature, thisbrochure should only be regarded as a guide and isintended for information purposes only. Its contents do notconstitute an offer for sale or advise on the application ofany product referred to in it. We cannot be heldresponsible for any reliance on any decisions taken on itscontents without specific advice.

T&D Worldwide Contact Centrecontact.centre@areva-td.comwww.areva-td.com

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