Category: ABB

SYNCHROTACT® Accessories Fast commissioning with SynView

SynView is a tool for simple and fast commissioning of

SYNCHROTACT® 5 devices. The PC software runs under

MS® Windows™ NT, 95. 98. 2000. XP and Windows 7 in the

standard languages German, English or French. SynView

consists of five functions explained below:

Parameter tool

All parameter settings are carried out using this tool. The files

can be stored on the PC and copied to other units. Helpful

functions such as comparing parameter settings between

device and PC-file, or the display of recommended setting

values, greatly simplify commissioning and servicing.

Transient recorder tool

The voltage difference and paralleling command from the

last three synchronizing processes are displayed. As such a

separate recorder is unnecessary.

Actual values tool

A synchroscope, together with all the values important for

paralleling, is displayed on the user interface. These simplify

function-testing of the synchronizing process if no instruments

are available.

Transient recorder tool

The voltage difference and paralleling command from the

last three synchronizing processes are displayed. As such a

separate recorder is unnecessary.

Actual values tool

A synchroscope, together with all the values important for

paralleling, is displayed on the user interface. These simplify

function-testing of the synchronizing process if no instruments

are available.

Event recorder tool

The 256 events stored in SYNCHROTACT® 5 are displayed

in plain text with date and timestamp. This greatly simplifies

the localization of faults, eg wiring or control faults which

sometimes occur during commissioning.

Diagnostic tool

In difficult cases where problems cannot be solved on site,

this tool helps the manufacturer to identify the causes of the

problem from the data stored in this tool.

Advantages of such a solution:

– No engineering and wiring costs for the second system

– Further increased security since all four output contacts

are normally operated in series

– No problems with synchronizing where the

manual synchronizing system is seldom used.

Specific settings for synchronizing and paralleling are stored

in a parameter set. Devices with seven parameter sets have

seven times the same parameters, with the possibility of

individual setting. That way, seven paralleling points with

individual settings may be operated. Firstly, the parameter

set, or the circuit breaker to be synchronized has to be

selected. Then the synchronizing process can be started.

The software-driven link between parameter set and

paralleling point guarantees the correct assignment of the

setting values to the related plant components.

The seven-in-one synchronizing device

Specific settings for synchronizing and paralleling are stored

in a parameter set. Devices with seven parameter sets have

seven times the same parameters, with the possibility of

individual setting. That way, seven paralleling points with

individual settings may be operated. Firstly, the parameter

set, or the circuit breaker to be synchronized has to be

selected. Then the synchronizing process can be started.

The software-driven link between parameter set and

paralleling point guarantees the correct assignment of the

setting values to the related plant components.

Control options

Service control for commissioning and servicing

– Built-in service controls: keypad and LCD (standard)

– SynView PC tool (accessory) for local control:

PC / Ethernet (standard)

– SynView PC tool (accessory) via LAN (standard)

Operating control for normal synchronizing operation

– Digital inputs/outputs: conventional wiring (standard)

– Interface (Modbus, Profibus, LON, IEC 61850):

remotecontrolled synchronizing operation (option)

Advice

Single or dual-channel?

Not every synchronizing system needs to be structured

according to the above pattern. The SYNCHROTACT® 5

single-channel synchronizing devices offer a high degree of

security and are often used in practice. However, security

can be significantly increased by means of dual-channel

systems. It is unlikely that the two channels – of which the

hardware and software are structured differently – will have

the same malfunction simultaneously. The extra cost of a

dual channel system can prove beneficial compared to the

damage arising from incorrect paralleling.

Second, redundant synchronizing system?

Often, two redundant synchronizing systems are installed

in a single plant so that, in the event of one system failing,

the other can be used, thereby increasing availability. The

second system is often designed for manual synchronizing

with or without synchrocheck.

In addition, with SYNCHROTACT® 5. ABB offers two automatic

dual-channel systems in a single casing, thus avoiding

manual synchronizing.

SYNCHROTACT® 5 Optimum reliability

From a synchronizing device, it is expected to close the

power circuit breaker at the correct time but also that, if

required, paralleling can take place whenever permissible.

Although the series connection of the output contacts of two

independently-functioning channels (dual-channel system),

which is usual in synchronizing systems, greatly increases

security against incorrect paralleling, it necessarily leads to a

reduction in availability.

High levels of safety and availability can be achieved by using

a second, redundant synchronizing system. If system 1 can

no longer synchronize, it is possible to do so by switching

over to the second system.

In this configuration, two automatic dual-channel systems

are housed in one unit. Normally, the output contacts of both

systems are connected in series (4 channels!). One of the

two systems can be bridged by means of a system selector switch.

Principle of operation

The synchronizing and paralleling process can be divided

into the following blocks

Measuring

Voltage difference ΔU (amplitude), slip s (frequency diffe

rence), and phase-angle α, are all required for paralleling.

These values are formed from the two measurement signals

U1 and U2 (see illustration, left).

Matching

Voltage and frequency matching functions reduce the voltage

difference ΔU, and slip s by sending adjusting pulses to the

voltage or turbine regulators.

Monitoring of paralleling conditions

This function compares the actual values with their set

maximum values and releases paralleling (CHK RELEASE) if

all conditions are fulfilled simultaneously.

Monitoring of paralleling conditions

This function compares the actual values with their set

maximum values and releases paralleling (CHK RELEASE) if

all conditions are fulfilled simultaneously.

Command generation

The command generation calculates the necessary lead angle

αv, by which the paralleling command must be advanced

due to closing time delay. The action ensures that the main

contacts close at precisely the right time. If α reaches αv at

the same time as paralleling release (CHK RELEASE), the

command is issued. Under synchronous conditions, ie,

permanent paralleling release during the adjustable monitoring

time, tsup, the CMD is also issued without taking the lead

angle into consideration.

Synchrocheck mode (paralleling monitoring)

In synchrocheck mode, only the measuring and monitoring

function blocks are active. The output relay is closed during

paralleling release.

SYNCHROTACT® 5

Range of applications

Synchronizing devices are widely used in power stations or

industrial installations with their own power generating facilities,

where the generators need to be paralleled with an island line

or a public line, or in power distribution systems.

Power circuit breakers may only be closed if both voltages are

approximately synchronous (coincident). Otherwise, faults in

line operation, loading of the generators and, in extreme cases,

damage to the generators can result.

SYNCHROTACT® 5 performs these functions safely and reliably,

whether as a monitoring element for manual paralleling or as

an independent fully-automatic synchronizing device.

Command generation

The command generation calculates the necessary lead angle

αv, by which the paralleling command must be advanced

due to closing time delay. The action ensures that the main

contacts close at precisely the right time. If α reaches αv at

the same time as paralleling release (CHK RELEASE), the

command is issued. Under synchronous conditions, ie,

permanent paralleling release during the adjustable monitoring

time, tsup, the CMD is also issued without taking the lead

angle into consideration.

SYNCHROTACT® Datasheet Advantages

ABB Switzerland Ltd is a world-leading

manufacturer of synchronizing equipment.

Application-specific systems are developed,

produced and commissioned. In addition, our

products are supported throughout the entire

lifecycle.

The product portfolio of SYNCHROTACT® offers enormous advantages

+ Optimum reliability

+ Guaranteed availability

+ Lowest project-engineering costs

+ Quick commissioning using PC tool SynView

+ Synchronizes up to seven power circuit breakers with different

requirements

+ Advanced technology

+ Universal use

+ Decades of experience with synchronizing systems

+ After-sales service: a 24 hour hotline available 365 days a

year and remote servicing via the Internet

+ Training program for commissioning and service personnel