P92X Presentation

MiCOM P92x

April 2010

C.F.Chow

Applications Manager

> MiCOM P92x3 3

� Reasons for Voltage Protection :

� Regulation Problems

�Load Variations

�Faults Conditions

� The protection functions depend upon the application

�PH/PH or PH/N voltages

�Time Delays

�Alarms / Tripping

Keeping in mind

Voltage and Frequency Relay

> MiCOM P92x4 4

Hz

Keeping in mind:

� Abnormal frequency Conditions

� Under-frequency:

� Insufficient generation

respect to the total demand

� Protection against turbine vibration at

low frequency

� Over-frequency:

� Total or partial rejection of load

� The frequency elements will be set as a back up

at the Automatic Speed Regulator


> MiCOM P92x5 5

P923

Voltage andFrequency plus df/dt


P922

� 3 Models are available

P923

P921

Voltage andFrequency

Voltage

> MiCOM P92x6 6

Public DistributorsCommunity/Tertiary-

sector

Industry

Production Transmission Distribution Embedded

Generators

Motors

Applications

Voltage and Frequency RelayApplications

> MiCOM P92x7 7

� Possible Connection of VTs:

� 3 VTs (Phase-Neutral)

� 3 VTs (Phase-Neutral) + 1 Residual VT

� 2 VTs (Phase-Phase) + 1 Residual VT

� 3 VTs (Phase-Phase) + 1 Residual VT

Voltage and Frequency RelayVTs Connections

+info

> MiCOM P92x8 8

VT Connection

> MiCOM P92x9 9

P922

Configuration: 3 VT ( Phase-Neutral )


> MiCOM P92x10 10

Configuration: 3 VT ( Phase-Neutral )+1Residual

P922


> MiCOM P92x11 11

Configuration: 3 VT ( Phase-Neutral )+1Residual

P922

Menu CONFIGURATION/GENERAL

PROTECTION

PROT P-P

or P-N

The voltage protection element can

operate either from the measured

Ph-N voltages or from the Ph-Ph voltages

which have been internally calculated.

Zero sequence O/V protection will be always available.


> MiCOM P92x12 12

Configuration: 3 VT ( Phase-Phase )+1Residual

P922


> MiCOM P92x13 13

Configuration: 2 VT (Phase-Phase )+1Residual

P922


> MiCOM P92x14 14

ANSI

Code Functions DescriptionModels

P921 P922

Phase Over-Voltage (3 thresholds)59

Phase Under-Voltage (3 thresholds)27

Zero Sequence Over-Voltage (3 th)

(Earth fault at the Generator neutral)59N

Negative Sequence Over-voltage (2 th)

(Unbalanced condition (Motor bay))

47

Positive Sequence Under-voltage (2 th)27D

Under-Frequency (out of 6 thresholds)81U

Over-Frequency (out of 6 thresholds)81O

P923

• • •

• • •

Frequency rate of change (df/dt) (6th)81R

• • •

• •

• •

•

• •

• •

Protections

Voltage and Frequency RelayProtections

> MiCOM P92x15 15

Tripping RL1 Watchdog

Logic

Inputs

2

Relay Outputs

4

MiCOM P92

L 1

RL 2RL 3RL 4

SupervisionL 2

Setting software

5927

RS 232

WD59N

Loading

Resistor

RS 48586

30

3 VT phases(57-130 V or 220-480 V)

1

Voltage Relay

> MiCOM P92x16 16

U/V Protection

> MiCOM P92x17 17

Phase UnderVoltage

[ 27 ]

� Load Variation

This function is used as back up for OLTC.


> MiCOM P92x18 18

[ 27 ]

FEATURES CHARACTERISTICS

� 3 Independents Thresholds

� Logic detection

� 5V to130V /20V to 480V

� AND/OR

� Configuration � Phase-Phase / Phase-Neutral

� Start Information � < 30 ms

� Settable Hysteresis � 102% to 105%


> MiCOM P92x19 19

� Constant or inverse time for the1st threshold

� Formula: t=TMS / ( 1-U/Us)

� TMS: 0.5 to 100

� Constant time for the 2nd & 3rd threshold.

� 0 to 600 sec

� tRESET � 0 to 100 sec


[ 27 ]


> MiCOM P92x20 20

P922

ANSI

Code Measurement Description

Models

P921 P923S G

• •••Phase voltages and Line Voltages-RMS values

Residual Voltage (true RMS Values)• •••

• •

Frequency

Direct (Positive) & Inverse (Negative) Voltages

Average Values (Ph-Ph & Ph-N)

Peak (maximale) values (Ph-Ph & Ph-N)

• •••

• •

• •

Voltage and Frequency RelayMeasurements

Measurements

> MiCOM P92x21 21

� Programmable Logic Inputs:

� P921 2

� P922 - P923 5

� Programmable Logic Outputs:

� P921 4

� P922 - P923 8

1 contact WatchDog for the 3 models


++info

> MiCOM P92x22 22

� Programmable LEDS:

� P921- P922 - P923 4


� All the Logic inputs, outputs and LEDs areprogrammable. All the logic signals (instantaneous ortime-delayed) can be combined with these programmableelements.

> MiCOM P92x23 23

� Latch of output Relays:

� For RL2 to RL4 for P921

� RL2 to RL8 for P922 & P923

� Only for the tripping relay RL1

� tU<, tU>>, tf1,…

� Latching by Function

� Latching by relay


> MiCOM P92x24 24

� Remote Communication RS485

� Using Front Panel

� Activation of associated logic input

� Settings Groups:

� P921 1

� P922- P923 2 independants

� Local Communication RS232

� Setting changes


++info

> MiCOM P92x25 25

Logs & Records

P922ANSI Code Description

Models

P921 P923S

• ••Events Records (75)

Faults Records (5) • ••

•

Disturbance Records (5 of 2,5 s)

Frequency Disturbance Records (1 of 20 s)

• ••

G

Voltage and Frequency RelayLogs & Records

> MiCOM P92x26 26

� Monitoring of the CB position

� P921-P922 - P923

� By using the Logic inputs and Programmable LEDs

� CB Control

� P921-P922 - P923

� Locally via Logic Inputs or

� Remotely via the communication

Voltage and Frequency RelayCB Monitoring & Control

> MiCOM P92x27 27

All the communication parameters (address, rate, parity...) areconfigurable by the user.

� RS 485: Remote Communication

� MODBUS

� RTU Standard

� COURIER

� Compatible K-Bus/Courier

� VDEW Standard

� IEC 60870-5-103

Voltage and Frequency RelayCommunications

> MiCOM P92x28 28

� Allows the downloading of a new firmware

version in the relay

� RS 232: Local Communication

� To connect a PC for settings

Voltage and Frequency RelayCommunications

> MiCOM P92x29 29

U/V Protection

> MiCOM P92x30 30

Phase UnderVoltage

[ 27 ]

� Load Variation

This function is used as back up for OLTC.


> MiCOM P92x31 31

Logic Scheme

U/V <

&

&IDMT/DT

Start V<

Trip V<

Bloc tU<

Logic Blocking


> MiCOM P92x32 32

[ 27 ]


� 3 Independents Thresholds

� Logic detection

� 5V to130V /20V to 480V

� AND/OR

� Configuration � Phase-Phase / Phase-Neutral

� Start Information � < 30 ms

� Settable Hysteresis � 102% to 105%


> MiCOM P92x33 33

� Constant or inverse time for the1st threshold

� Formula: t=TMS / ( 1-U/Us)

� TMS: 0.5 to 100

� Constant time for the 2nd & 3rd threshold.

� 0 to 600 sec

� tRESET � 0 to 100 sec


[ 27 ]


> MiCOM P92x34 34

Voltage

Time

0

U<

U<<

U<<<


> MiCOM P92x35 35

Under Voltage Blocking

> MiCOM P92x36 36


U/V blocking are used to block the

functioning of all the protection & control

elements based on frequency, under fault condition

If the threshold is exceeded, all the elements based on

frequency will be blocked, and an alarm

FREQUENCY OUT of ZONE will be generated.

No influence to the

standard U/O voltage

protection elements

P92X Presentation

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