arthurazs / py61850

IEC 61850 in Python

py61850

IEC 61850 for Python 3.

Stable Version, Linting (PEP8) and Coverage

Testing for other Python Versions

What I want it to be

sync61850

from socket import AF_PACKET, socket, SOCK_RAW
from sys import argv
from time import sleep

nic = socket(AF_PACKET, SOCK_RAW)
nic.bind((argv[1], 0))

from sansio61850.goose import Publisher
from sansio61850.types import Boolean, VisibleString


ied = 'IED_Pub'
ref = f'{ied}_CFG/LLN0'
publisher = Publisher(destination='01:0c:cd:01:00:13', vlan=False, app_id=1,
                      gcb_ref=f'{ref}$GO$GOOSE_SENDER', data_set=f'{ref}$MyDataSet',
                      go_id=ied, all_data=(Boolean(True), VisibleString('Content')))

for sq_num, goose in enumerate(publisher):
    if sq_num == 10:
        goose.pdu.all_data[1] = 'New Content'  # VisibleString
    nic.send(bytes(goose))
    sleep(goose.next_goose_timer)

Roadmap

According to IEC 61850 parts 7-2, 8-1 and 9-2, and ISO 9506 parts 1 and 2.

BER encoding.

• NEXT TODOs

• add base.py missing test

• move py61850 to sansio61850, sync61850

• separate encoder from decoder

• Exceptions

  • Add custom exceptions
    • TagError
    • LengthError
    • RangeError
  • Review every exception message
  • Implement EAFP-based functions?

• Basic Types

  • Make sure data returns only the specified length, e.g.:
    • data[1:5] instead of data[1:]
  • Care for undefined ASN.1 length
    • 0x0000 to denote the end of the data
  • Boolean
  • Unsigned Integer (ISO)
    • Enumerated (IEC)
  • Signed Integer
  • Floating Point
  • Visible String
  • Octet String
  • MMS String (ISO) | Unicode String (IEC)
  • Time Stamp
  • Time of Day (ISO) | Entry Time (IEC)
  • Bit String (ISO) | Coded Enum (IEC)

Should py61850 support raw MMS (ISO)?

Should py61850 log what is happening? This might decrease performance.

Should support different modes of operation? (direct control, SBO, normal/enhanced sec)

Change obj.tag to return the class name instead of the hex value of raw_tag?

Should I enable changing obj value/raw_value after it being created?

Check gridsoftware.

Frame Generator or GOOSE Emulator? e.g., Should I enable starting a GOOSE from stnum 10 instead of 0?

# TODO Test the time difference between both

v_str = VisibleString.encode('arthur')
assert v_str == b'\x8A\x06arthur'
assert type(v_str) == bytes

v_str = VisibleStringEncoder('arthur')
assert bytes(v_str) == b'\x8A\x06arthur'
assert type(v_str) == VisibleStringEncoder

Reference

• https://www.sphinx-doc.org/en/1.8/usage/extensions/example_google.html#example-google
• https://www.ossnokalva.com/asn1/resources/asn1-made-simple/introduction.html
• IEC 61850-9-2 Figure A.3 (ASN.1)

Ideas

• Read MMS PCAP and recreate an IED
• Read GOOSE + MMS and get INFO about GOOSE
• Raspberies
• Raspberies + IEDs
• SDN
• Communication Security
• Teleprotection
• Protection
• IED Simm, simple, that sends a trip, and has gui (info tech ied sim)
• Test bed with 3 substations? to study goose cascading, etc...
• Use SCD to recreate all the IED instances
• AMI
• GOOSE, SV and MMS monitor

GOOSE

You can test the generic publisher by running the following:

user@host:~/communication$ sudo python3 -m communication.publish_goose lo

NOTE: The lo parameter represents the network interface which will send the GOOSE frame.