ABB Relion 630 Series User manual

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RELION® 630 SERIES
Power Management
PML630/Compact Load-Shedding
Solution
Product Guide

Contents
1. Description..................................................................... 3
2. Power management systems......................................... 3
3. Load-shedding............................................................... 3
4. Application .................................................................... 3
5. Communication.............................................................. 4
6. Network architecture for cPMS load-shedding
Configuration A...............................................................5
7. Terminology....................................................................7
8. Power network configuration support in cPMS
load-shedding Configuration A....................................... 7
9. Configuration flexibility.................................................... 8
10. Network configuration for cPMS load-shedding
Configuration B............................................................. 8
11. Communication architecture support...........................10
12. System protection and control functions..................... 10
13. Load-shedding inputs and outputs..............................15
14. Disturbance recording ................................................ 18
15. Event log..................................................................... 19
16. Load-shedding performance....................................... 19
17. Redundancy................................................................20
18. Self-supervision...........................................................21
19. Access control............................................................ 21
20. Time synchronization...................................................21
21. Integration into switchgear...........................................21
22. Technical data.............................................................23
23. Front panel user interface............................................ 36
24. Mounting methods...................................................... 36
25. Selection and ordering data ........................................37
26. Accessories.................................................................40
27. Tools...........................................................................40
28. Supported ABB solutions ........................................... 42
29. Terminal diagrams.......................................................43
30. References..................................................................44
31. Functions, codes and symbols.................................... 45
32. Document revision history........................................... 47
Disclaimer
The information in this document is subject to change without notice and should not be construed as a commitment by ABB. ABB assumes no responsibility for any errors
that may appear in this document.
© Copyright 2019 ABB.
All rights reserved.
Trademarks
ABB and Relion are registered trademarks of the ABB Group. All other brand or product names mentioned in this document may be trademarks or registered trademarks
of their respective holders.
Power Management
1MRS757334 E
PML630/Compact Load-Shedding Solution
Product version: 1.2.1
2 ABB

1. Description
PML630 is a power management device that provides
comprehensive load-shedding solution for the power network
in an industrial plant. It protects the plant against blackouts and
power source outages due to system disturbances. PML630 is
a member of ABB’s Relion® product family and a part of its 630
series characterized by their functional scalability and flexible
configurability.
PML630 complies to IEC 61850 and offers seamless
connectivity with Relion 630, 620 and 615 series protection
relays, RIO600 IO units and COM600 to realize the load-
shedding functionality. The device uses GOOSE and MMS
communication profiles for I/O data exchange with other Relion
product family protection relays and COM600 series products.
2. Power management systems
Power Management Systems (PMS) is essential for a safe,
efficient and reliable operation of a power system within an
industrial complex. The PMS functionality suite includes load-
shedding, generator control, power sharing, network
synchronization and power restoration.
PMS solutions protect and optimize the stability of industrial
systems against disturbances by ensuring power sharing
between generators when the industrial power system is
islanded from the grid. These solutions also ensure that the
generators meet the required power demand when the network
is grid-connected. By ensuring fast acting load-shedding
action, generator tripping can be avoided and thereby
facilitating possible islanding of the network.
PMS solutions are suitable for industrial power networks.
• With captive power generation - islanded or grid-
connected
• With substantial and critical loads
• With unstable grid connectivity
• Without grid connectivity
The PMS functionality suite is applicable in various industrial
segments. Some of the industrial segments are Oil and Gas,
Marine, Pulp and Paper, Metals, Minerals, Building automation,
Infrastructure, Food and Beverage. In power utilities, load-
shedding application is particularly relevant.
3. Load-shedding
Load-shedding is required when the electrical load demand
exceeds the capacity of available power sources subsequent to
the loss of power sources or network disintegration. The load-
shedding system has to ensure the availability of electrical
power to all essential and, most importantly, critical loads in the
plant. This is achieved by switching off the non-essential loads
in case of a lack of power in the electrical network or parts of the
electrical network (subnetwork or island).
The load-shedding functionality can also be deployed in
industrial power networks with sole dependency on the utility
networks.
The lack of electrical power can be caused by a loss of
generation capacity or power grid connectivity or the tie line
feeding power to the plant.
Based on the shortfall of available power in the power network,
the load-shedding action initiated by the system ensures that
only identified loads are shed, system is stable after load-
shedding and impact on the associated plant operation is
minimal. The system allows flexibility to select or deselect the
load feeders to be load-shed at any point in time during plant
operation.
Furthermore, the load-shedding function should not operate if
the situation in the power network does not necessitate such an
action. Thus, it has to be accurate and selective.
4. Application
PML630 provides system level protection to small or medium-
sized industrial systems from the system disturbances. The
device supports different modes of load-shedding functions.
• Fast load-shedding
• Slow (overload or maximum demand violation-based)
load-shedding
• Manual load-shedding
• Underfrequency load-shedding as a backup to fast and
slow load-shedding
A network power deficit occurs when a power source such as a
generator or a grid transformer trips. There could also be a
power shortage when a network becomes isolated due to trip of
a bus coupler or a bus tie breaker. The fast load-shedding
function protects the power network during a power deficit.
The fast load-shedding function takes corrective action before
the system frequency [1] drop and provides faster and accurate
load-shedding action based on the power balance calculations
and defined priorities. Thus, the function also contributes
towards faster improvement of the frequency profile of the
system.
The slow load-shedding function prevents the tripping of a
power source during an overload condition. The slow (overload)
load-shedding function triggers the load-shedding and resets
the overload condition by acting faster than the dedicated
overload protection function for the power sources. The
overload situation can arise due to the overcurrent detection in
a generator or grid transformer, or maximum demand violation
at the power grid incomer for a specified period of time. Based
on the amount of the overload, the slow load-shedding function
determines the required load to be shed and uses the power
[1] A frequency-based load-shedding scheme, at the feeder level, acts based on the frequency drop caused by a power deficit. It triggers the shedding of loads based on the preset rate of
change of the frequency or the discreet frequency value settings in their respective devices. It can sometimes result in excessive load-shedding.
Power Management
1MRS757334 E
PML630/Compact Load-Shedding Solution
Product version: 1.2.1 Issued: 2019-08-27
Revision: E
ABB 3

balance calculations for arriving at the load-shedding priority
and to initiate the load-shedding action.
Using the manual load-shedding function, the load-shedding of
multiple load feeders can be initiated based on priorities or the
required total power relief.
The underfrequency-based load-shedding function detects
frequency decay and activates the shedding mechanism
described for fast and manual load-shedding functions.
All load-shedding functions can be active concurrently.
5. Communication
PML630 only supports the IEC 61850 substation
communication standard and its GOOSE and MMS
communication profiles.
PML630 is optimized to interoperate with REF615, REG615,
REM615, RET615, REF620, REM620, RET620, REF630,
REG630, REM630, RET630, RIO600 and COM600S or
COM600F. All the load-shedding operational and control
information is exchanged over IEC 61850 GOOSE and MMS.
Other ABB IEC 61850 devices, such as Relion 670/650 series
intelligent electronic devices (IEDs) and AC800M, and HMI
systems like MicroSCADA, System 800xA, can also be
integrated into the solution cluster. However, PML630 can also
be made to interoperate with any non-ABB or third-party IEC
61850 devices, provided they are able to meet the functional
requirements for load-shedding.
Disturbance files in COMTRADE file format can also be
accessed using the IEC 61850 standard's MMS file transfer
services or any standard protocol like FTP. PML630 exchanges
analog and binary signal information with the mentioned
devices and IO units (horizontal communication) using the
GOOSE profile. It meets the GOOSE performance requirements
for tripping applications (Type 1A, performance class 1) like
load-shedding in distribution substations, as defined by the IEC
61850 standard. PML630 can also interoperate with other IEC
61850-compliant devices, tools and systems and
simultaneously report events to five different clients on the IEC
61850 station bus. It is connected to Ethernet-based
communication systems via the RJ-45 connector
(10/100BASE-TX) or the fibre-optic multimode LC connector
(100BASE-FX).
The GOOSE communication profile for load-shedding offers
several advantages.
• Minimal or no hardwiring between panels
– Substation LAN can be used as the transmission
medium of binary and analog process data between
devices.
– Less I/O hardware in devices
– Lesser maintenance costs (due to lesser wiring
diagrams, terminal blocks and connections)
– Better predictability in the system or functionality
verification
• Fast and reliable station bus for data transfer offered by
Ethernet LAN technology
• Fast performance enabled by GOOSE.
– No need for additional signal processing, for example,
intermediate interposing relays, filtering and flutter
suppressions in binary signal transfer.
– Much faster binary signal transfer between devices than
with conventional hardwiring
– High performance
• Supervision of signals being transferred over GOOSE for
data integrity (based on, for example, quality and
communication status)
Power Management
1MRS757334 E
PML630/Compact Load-Shedding Solution
Product version: 1.2.1
4 ABB

6. Network architecture for cPMS load-shedding
Configuration A
The integrated approach with PML630, 620, 630 or 615 series
feeder protection relays, RIO600 IO units and COM600S or
COM600F to realize load-shedding power management
solution is designated as cPMS (Compact Power Management
System) load-shedding Configuration A. The cPMS load-
shedding Configuration A is also a functionality feature in
PML630.
The load-shedding network architecture consists of devices,
their functional organization and inter-device communication.
PML630 performs load-shedding actions based on the binary
and measurement data it receives from the protection relays or
IO unit (RIO600) associated with generator feeders, grid
transformer feeders, motor or load feeders, bus coupler feeders
and bus tie feeders.
Using RIO600, non-IEC 61850 based feeders can be easily
adapted for the load-shedding functionality. All the binary IO
signals and the transducer inputs can be connected to RIO600.
Furthermore, the data exchange between PML630 and RIO600
is based on GOOSE like 630 and 615 series protection relays.
After making a decision to take load-shedding action, PML630
sends shedding commands to motor or load feeders through
their respective devices. The load-shed commands, when
issued through the Relion protection relays or RIO600, can
either be used to directly trip the circuit breaker or extended
using auxiliary relays.
COM600 series product monitors and controls the load-
shedding and substation operations. This is realized over the
IEC 61850 MMS communication between COM600S or
COM600F and PML630 and feeder protection relays. Since
RIO600 supports only GOOSE, it may be appropriate to have
the GOOSE communication association between RIO600 and
COM600S or COM600F.
The load-shedding functionality information can be exchanged
with any external system using the communication gateway
features of COM600S or COM600F. See the COM600S or
COM600F product documentation for more details.
Power Management
1MRS757334 E
PML630/Compact Load-Shedding Solution
Product version: 1.2.1
ABB 5