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DL/T 5149-2001: Technical code for designing computerized monitoring and control system of 220~500kV substations
DL/T 5149-2001
POWER INDUSTRY STANDARD OF
THE PEOPLE?€?S REPUBLIC OF CHINA
ICS 27.100
P 62
Filing No.: J152-2002
P DL/T 5149-2001
Technical code for designing computerized
monitoring and control system of 220~500kV
substations
ISSUED ON: DECEMBER 26, 2001
IMPLEMENTED ON: MAY 1, 2002
Issued by: National Economic and Trade Commission of the People?€?s
Republic of China
Table of Contents
Foreword ... 5??
1 Scope of application ... 7??
2 Normative references ... 8??
3 General ... 9??
4 Main terms ... 10??
5 System composition ... 12??
5.1 System structure ... 12??
5.2 Network structure ... 12??
5.3 Hardware equipment ... 13??
5.4 Software system ... 14??
5.5 Technical indicator ... 15??
6 System functions ... 18??
6.1 Data acquisition and processing ... 18??
6.2 Database establishment and maintenance ... 18??
6.3 Control operation ... 19??
6.4 Anti-mislocking ... 20??
6.5 Synchronizing ... 20??
6.6 Alarm processing ... 21??
6.7 Event sequence recording and accident recall ... 21??
6.8 Screen generation and display ... 22??
6.9 Online calculation and tabulation ... 22??
6.10 Electric energy processing ... 23??
6.11 Telecontrol function ... 23??
6.12 Clock synchronization ... 23??
6.13 Man-machine interaction ... 24??
6.14 System self-diagnosis and self-recovery ... 25??
6.15 Interface with other devices ... 25??
6.16 Operation management ... 26??
7 Signal input/output ... 27??
7.1 Analog input signal ... 27??
7.2 On-off input signal... 27??
7.3 Electrical energy data input signal ... 27??
7.4 On-off output signal... 28??
8 Equipment layout ... 29??
8.1 Layout of station level equipment ... 29??
8.2 Layout of bay level equipment ... 29??
8.3 Screen cabinet structure and screen layout ... 29??
9 Venue and environment ... 30??
10 Power supply ... 31??
11 Lightning protection and grounding ... 32??
12 Cable selection and laying ... 34??
Appendix A (Indicative) Description of the words in this Code ... 35??
Appendix B (Indicative) Analog signal ... 36??
Appendix C (Indicative) Main on-off input signals ... 43??
Appendix D (Indicative) Electrical energy signal acquisition parameters ... 45??
Appendix E (Indicative) On-off output signals ... 47??
1 Scope of application
This Code is applicable to the design of computerized monitoring and control
system for the newly built 220kV hub substations and 500kV (330kV)
substations. Expansion and reconstruction projects of the same voltage
grade may be carried out with reference.
2 Normative references
The following standards include provisions that constitute provisions of this
Code by reference in this Code. At the time of publication of this Standard, the
editions indicated are valid. All standards are subject to revision. Parties to
this Standard shall explore the possibility of using the latest editions of the
following standards.
GB/T 50217-1994 Code for design of cables electric work
GB/T 17626-1998 Electromagnetic compatibility ?€? Testing and
measurement techniques
DL/T 630-1997 Technical requirement for RTU with a.c. electrical
quantities input, discrete sampling
DL/T 634-1997 Telecontrol equipment and systems ?€? Part 5: Transmission
protocols ?€? Section 101 Companion standard for basic telecontrol tasks
DL/T 667-1999 Telecontrol equipment and systems ?€? Part 5: Transmission
protocol ?€? Section 103 Companion standard for the information interface of
protection equipment
DL/T 719-2000 Telecontrol equipment and systems ?€? Part 5: Transmission
protocol ?€? Section 102 Companion standard for the transmission of
integrated totals in electric power systems
DL 5002-1991 Specifications for the design of dispatching automation in
district electric power systems
DL 5003-1991 Specifications for the design of dispatching automation in
electric power systems
DL/T 5136-2001 Technical code for designing of electrical secondary
wiring in fossil fuel power plants and substations
DL/T 5137-2001 Technical code for designing electrical measuring and
energy metering device
SDJ 2-1988 Technical code for designing 220~500kV substations
3 General
3.0.1 This Code is specific design regulations for 500kV (330kV)
substations and 220kV hub substations using the computerized monitoring
and control system, and is supplementary regulations for implementing the
relevant provisions of Technical code for designing 220~500kV substations
and Technical code for designing of electrical secondary wiring in fossil fuel
power plants and substations.
3.0.2 The design of the computerized monitoring and control system of
substations shall follow the following principles:
1) Improve the safety production level, technical management level and
power supply quality of substations.
2) Make the substations easy to operate and simple to maintain, improve
labor productivity and operating efficiency, and realize the reduction of
labor and enhancement of efficiency.
3) Reduce connection between secondary devices, and save control
cables.
4) Reduce the configuration of substation equipment, avoid repeated
equipment settings, and achieve resource sharing.
5) Reduce the area of substations and the project cost.
3.0.3 The selection of the computerized monitoring and control system of
substations shall be safe, reliable, economical, advanced in technology, and
in line with nationality. Mature and reliable products that are open, extensible,
and highly resistant to interference shall be adopted.
3.0.4 The computerized monitoring and control system of substations shall
be able to realize reliable, reasonable and perfect monitoring of substations,
shall have all telecontrol functions such as telemetering, tele-signalisation,
tele-regulation, telecontrol, etc., and shall be capable of exchanging
information with the computer system of the dispatching communication
center.
3.0.5 In addition to the implementation of this Code, the design of the
computerized monitoring and control system of substations shall also carry
out relevant standards, specifications and codes, and regulations.
4 Main terms
4.0.1 Hierarchical
A way to organize elements at different levels. Among which, the elements of
the higher level have a control relationship with the elements of the lower
level.
4.0.2 Distributed
Refer to the distribution of the composition of the computerized monitoring
and control system of substations in resource logic or topology, mainly
focusing on the distribution problem on processing and distribution problem
on functions from the perspective of system structure.
4.0.3 Decentralized
Refer to the composition of the computerized monitoring and control system
of substations in terms of physical significance relative to centralization,
emphasizing the object-oriented and geographic decentralization.
4.0.4 Data acquisition
Convert all kinds of electrical quantity and status signals in the field into digital
signals that can be recognized by the computer and store in the computer
system.
4.0.5 Data processing
Systematize all kinds of data of related equipment to support the system to
complete the functions of monitoring and control, protection, control and
recording.
4.0.6 Monitoring and control
Verify whether functions are performed correctly by continuous or periodic
monitoring and control of the system or equipment, and adapt their operating
conditions to changing operational requirements.
4.0.7 Interface
Interface or connection device between two different systems or entities.
4.0.8 Communication protocol
The strict conventions necessary to initiate and maintain communication, i.e.,
a set of conventions regarding the sequence in which information is
transmitted, the format of the information, and the content of the information.
5 System composition
5.1 System structure
5.1.1 The computerized monitoring and control system of substations
should be composed of two parts: station level and bay level, and connected
by hierarchical, distributed, and open network system.
5.1.2 The station level is composed of a main unit or/and an operator station
and various functions of the computerized monitoring and control system
connected by the computer network, provides the man-machine interaction
interface running in the station, realizes the functions of management and
control of bay level equipment, forms a full station monitoring and
management center, and can communicate with the dispatching
communication center.
5.1.3 The bay level consists of several monitoring and control subsystems
connected by the industrial control network/computer network. In the case of
station level and network failure, the local monitoring and control function of
the bay equipment can still be completed independently.
5.1.4 The station level can be directly connected to the bay level or
connected via a pre-layer device. The pre-layer can communicate with the
dispatching communication center.
5.1.5 The station level equipment should be set centrally. The bay level
equipment should be decentralized in a relatively centralized manner. When
the technology is economically reasonable, it can also be set in a fully
decentralized manner or in a fully centralized manner.
5.2 Network structure
5.2.1 The station level and bay level of the computerized monitoring and
control system may adopt a unified computer network, or different networks,
respectively. When adopting a unified network, it is advisable to adopt a
network structure recommended by international standards.
5.2.2 The station level should use Ethernet recommended by international
standards. The station level system shall have good openness.
5.2.3 The bay level should adopt industrial control network, which shall
have sufficient transmission rate and extremely high reliability. Direct
communication between bay level monitoring subsystems should be realized.
5.2.4 The network topology should be either bus type or ring type, or star
type. The physical connection between the station level and the bay level
telecontrol information shall come directly from the real-time data acquired by
the bay level. Telecontrol communication equipment shall meet the
requirements of DL 5002 and DL 5003, and its capacity and performance
indicators shall meet the telecontrol function and protocol conversion
requirements of the substations.
5.3.7 The GPS timing device shall be set. The number of synchronous
pulse output interfaces and digital interfaces shall meet the system
configuration requirements, and the timing accuracy of the I/O unit shall meet
the requirements of the event sequence recording resolution.
5.3.8 The configuration quantity and performance of the printer shall be able
to meet the functional requirements of timing tabulation, call printing and
accident printing.
5.3.9 Shielded twisted pairs, coaxial cables, optical cables, or a combination
of the above several ways can be adopted for the network media. Optical
cables shall be used for long-distance communication outdoors.
5.3.10 The bay level equipment should include modules such as central
processing unit, memory, communication, and I/O control. The I/O unit shall
be configured as an electrical unit, and shall be modular, standardized, easy
to maintain and replace, allowing hot plugging.
5.3.11 When using a pre-layer device connection mode, redundant settings
shall be applied to the front-end unit.
5.3.12 The protection communication interface device can be decentralized,
and shall be able to communicate with various bay level protection devices.
5.4 Software system
5.4.1 The software of the computerized monitoring and control system of
substations shall consist of system software, supporting software and
application software.
5.4.2 The reliability, compatibility, portability, extensibility and interface
friendliness of the software system shall meet the requirements of the current
and future planning of the system.
5.4.3 The software system shall be modular in structure for easy
modification and maintenance.
5.4.4 The system software shall be a mature real-time multitasking
operating system with a complete self-diagnostic program.
5.4.5 The structure of the database shall meet the requirements of
decentralized and distributed control methods, have good maintainability, and
5.5.5 The analog-to-digital conversion resolution is not less than 12 bits,
and the maximum error shall meet the requirements of DL/T 630-1997.
5.5.6 The analog dead-band transmission time is no more than 2s (to the
station level display).
5.5.7 The on-off displacement transmission time is no more than 1s (to the
station level display).
5.5.8 The correct rate of telecontrol operation is not less than 99.99%, and
the correct rate of tele-regulation is not less than 99.9%.
5.5.9 The response time of the on-off signal input to screen display is no
more than 2s.
5.5.10 The resolution of the sequence of event (SOE) is no more than 2ms.
5.5.11 The dynamic screen response time is no more than 2s.
5.5.12 The timing accuracy error of the entire system shall be no more than
1ms.
5.5.13 For equipment installed in the main control room, the
electromagnetic immunity requirements can be referred to the general
industrial standards; and the bay level equipment and the network equipment
installed in the relay kiosk shall have immunity to this electromagnetic
environment. The immunity of the bay level equipment and network
equipment of the relay kiosk for 500kV (330kV) substations should meet the
following test level requirements:
For electrostatic discharge In line with GB/T 17626-4-2, Level 4
For radiated electromagnetic field In line with GB/T 17626-4-3, Level 3
(Level 4 required for network)
For fast transient In line with GB/T 17626-4-4, Level 4
For impact (surge) In line with GB/T 17626-4-5, Level 3
For electromagnetic induction conduction In line with GB/T 17626-4-6,
Level 3
For power frequency electromagnetic fie...