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DL/T 364-2019: General specification of transmitting protection information on optical channel
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Basic data | Standard ID | DL/T 364-2019 (DL/T364-2019) | | Description (Translated English) | General specification of transmitting protection information on optical channel | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | K45 | | Classification of International Standard | 29.240 | | Word Count Estimation | 24,23 | | Date of Issue | 2019 | | Date of Implementation | 2019-10-01 | | Issuing agency(ies) | National Energy Administration | DL/T 364-2019: General specification of transmitting protection information on optical channel---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
General specification of transmitting protection information on optical channel
ICS 29.240
K 45
People's Republic of China Electric Power Industry Standard
Replace DL/T 364-2010
General technical conditions for fiber channel transmission and protection information
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Foreword...II
1 Scope...1
2 Normative references...1
3 Definition of terms...1
4 General...3
5 Fibre Channel Technical Requirements for Transmission of Relay Protection Information...3
6 Technical requirements for relay protection equipment that use optical fiber channel to transmit information...4
7 Technical requirements for the interface between relay protection and optical fiber communication network...4
8 Technical requirements for connection of relay protection devices and communication terminal equipment...4
9 Fibre Channel configuration principles...5
10 Fibre Channel Testing...5
Appendix A (informative appendix) Related basic concepts...7
Appendix B (informative appendix) Implementation plan for connection of relay protection device and communication terminal equipment...11
Appendix C (Informative Appendix) Channel Configuration Scheme...13
Appendix D (Informative Appendix) Fibre Channel Test Report...16
References...21
Foreword
This standard is compiled in accordance with the rules given in GB/T 1.1-2009.
This standard replaces DL/T 364-2010 "General Technical Conditions for Fibre Channel Transmission and Protection Information". Compared with DL/T 364-2010, except
In addition to editorial changes, the main technical changes are as follows.
--Updated standard normative reference documents;
--Deleted the relevant definition and description of the 64kbit/s communication rate;
--Clarified that the line longitudinal differential protection channel must not use the self-healing function of SDH channel switching loop mode;
--Increase the requirements of dual-channel line protection for channels;
--Added the definition and application of 2M optical interface;
--Added the definition and application scenarios of ASON based on demolished first.
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the Power Industry Relay Protection Standardization Technical Committee.
The main drafting units of this standard. China Southern Power Grid Power Dispatching Control Center, Nanjing Nanrui Relay Electric Co., Ltd., National Power Dispatching
Information Center, East China Electric Power Dispatching Communication Center, Jiangsu Electric Power Dispatching Communication Center, Guangdong Power Grid Electric Power Dispatching Control Center, Jiangsu Electric Power
The company’s Electric Power Research Institute, Jiangxi Electric Power Company Electric Power Research Institute, Jiangsu Electric Power Maintenance Company Operation and Inspection Department, Beijing Sifang Relay
Donghua Co., Ltd., Xu Ji Electric Co., Ltd., Guodian Nanjing Automation Co., Ltd., Changyuan Shenrui Relay Automation Co., Ltd.
the company.
The main drafters of this standard. Zhou Hongyang, Xu Xiaochun, Liu Yu, Yu Jiang, Liu Zhongping, Xu Ning, Liu Kun, Gao Lei, Pan Benren, Chen Rui
Jun, Su Liming, Li Baowei, Zou Lei, Liu Hongjun.
The previous published versions of the standard replaced by this standard are.
--DL/T 364-2010
The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of China Electricity Council (Baiguang, Xicheng District, Beijing)
Lu Er Tiao No. 1, 100761).
General technical conditions for fiber channel transmission and protection information
1 Scope
This standard specifies the interface between relay protection devices and communication equipment, interface connection, protection channel composition, relay protection specialty and electrical
Relevant technical principles of power communication, the reliability index of fiber channel transmission of relay protection information, and the configuration and
maintain.
This standard is applicable to the optical fiber channel of 110kV and above power grid to transmit relay protection information.
2 Normative references
The references in the following documents are essential. For dated reference documents, only the dated version applies to this document. Anything not
For dated reference documents, the latest version (including all amendments) applies to this document.
GB/T 7611 Digital Network Series Bit Rate Electrical Interface Characteristics
GB/T 14285 Technical Regulations for Relay Protection and Safety Automatic Equipment
GB/T 16712 Synchronous Digital Hierarchy (SDH) Equipment Function Block Features
GB/T 21645.2 Automatically Switched Optical Network (ASON) Technical Requirements Part 2.Terms and Definitions
GB/T 24367.1 Automatic Switched Optical Network (ASON) Node Equipment Technical Requirements Part 1.SDH-based ASON Node Equipment
skills requirement
DL/T 547 Power system optical fiber communication operation management regulations
DL/T 788 All dielectric self-supporting optical cable
DL/T 832 Optical fiber composite overhead ground wire
ITU-T G.703.Physical/electrical characteristics of a series of digital interfaces
ITU-T G.805.General functional structure of transport network
3 Definition of terms
The following terms and definitions apply to this standard.
3.1 Professional terminology for relay protection
3.1.1
Reliability
The configured relay protection device can only operate when it is required to act in advance (that is, reliability).
It does not act when it needs to act (that is, safety).
3.1.2
Pilot protection
Fast-action protection that uses communication channels such as power line carrier, microwave, optical fiber or special guide wire to transmit each side protection information to each other.
3.1.3
Line differential protection
The communication channels are used to mutually transmit the electrical quantities of each side of the protected line, and the protection of each side is calculated according to the current data of the current side and the other side.
Protect the current difference on the line, and determine the protection of the internal and external faults based on the current difference, referred to as the line longitudinal differential protection.
3.1.4
Pilot distance protection
The protection of each side of the line measures the fault range by the distance element, and uses the communication channel to transmit command signals to each other. The protection of each side is based on this
The result of the side and the command signal of the other side comprehensively distinguish the protection of the internal and external faults.
3.1.5
Digital interface equipment
When the relay protection is connected to the optical fiber communication terminal equipment, the protection signal realizes the specified code conversion and connects to the optical fiber communication terminal equipment
3.1.6
Command signal
Protect contact information such as permission, blocking, and remote tripping transmitted by the communication channel.
3.1.7
Protection command interface equipment
In order to exchange command signals from each side, it is a device that realizes command signal modulation and demodulation function.
3.1.8
Communication abnormal time
Refers to the communication abnormality (such as CRC check error, frame structure abnormality, communication interruption, etc.) experienced by the longitudinal protection device or the protection command interface device
The accumulated time.
3.1.9
Frame error number
Refers to the accumulation of abnormal communication frames (such as CRC check error, abnormal frame structure, etc.) received by the longitudinal protection device or the protection command interface device.
3.1.10
Frame loss number
Refers to the cumulative value of frames that should be received by the pilot protection device or the protection command interface device but not received.
3.2 Communication terminology
3.2.1
Self-healing network
Without manual intervention, the network can automatically recover the carried services from failures in a very short time, and the communication can operate normally.
Row. However, the repair of the fault still requires manual intervention to complete.
3.2.2
Synchronous Digital Hierarchy (SDH)
A type of digital multiplexing technology. Different from the plesiochronous (PDH) system, it has and adopts in the aspects of speed, frame structure, optical interface, etc.
Use international uniform standards.
3.2.3
All dielectric self-supporting optical fiber cable (ADSS)
The all-dielectric self-supporting optical cable is a non-metallic optical cable that contains necessary supporting elements and can be directly hung on the tower. Against electricity
There are strict standards for corrosion characteristics and mechanical characteristics. Mainly used in the communication lines of overhead high-voltage power transmission systems, and can also be used in lightning-prone areas
The communication line in the environment of overhead laying, such as belt and large span.
3.2.4
Optical fiber composite overhead ground wires (OPGW)
Optical fiber composite overhead ground wire is a kind of ground wire used for high-voltage power transmission system communication lines, with ordinary overhead ground wire and communication optical cable
Dual function.
3.2.5
Delay
The time it takes for a digital signal to travel through a digital connection at group speed.
3.2.6
Path switching time
The channel is from the failure of the service channel to the time when the service is completely switched to the communication protection channel.
3.2.7
Path recovery time
The channel confirms that the service channel fault has been eliminated, and restores the service from the communication protection channel to the service channel. From toggle switch action to business
The signal is fully restored to this period on the service channel.
3.2.8
2M optical interface 2Mb/s Optic-interface
A unified optical interface for interconnection between relay protection devices and communication synchronous digital system equipment.
3.2.9
Automatically switched optical network
ASON is an automatic switching transmission network (ASTN), suitable for connection-oriented circuit or packet transmission defined by ITU-T G.805
Send to the network, through the control plane to complete the connection control and management. The control plane supports the establishment, removal and maintenance of end-to-end connections through signaling
The ability to select the appropriate route for the connection through routing; perform protection and recovery functions when the network fails; automatically discover the adjacency relationship
And link information, publish link state information to support connection establishment, teardown and recovery.
4 General
4.1 The optical fiber channel for relay protection should be stable and reliable, and meet the technical requirements of relay protection.
4.2 The multiplex channel should adopt a 2Mb/s digital interface, and the technical conditions of the 2Mb/s digital interface should comply with the standards GB/T 7611 and GB/T 16712.
4.3 The channels of the two sets of protection on the same line shall be independent of each other, and the two channels of the same set of protection shall be independent of each other.
4.4 The optical fiber channel used for line longitudinal current differential protection shall ensure the same transmission and reception routes.
5 Fibre Channel Technical Requirements for Transmission of Relay Protection Information
5.1 The one-way delay of the communication channel used for relay protection should be ≤12ms.
5.2 The optical fiber channel for transmitting relay protection information should satisfy the channel bit error rate BER≤10-8.
5.3 The performance indicators of the optical fiber self-healing network communication circuit section that transmits relay protection information should comply with GB/T 16712.
5.4 The channels used for line longitudinal distance and direction protection can use unidirectional channel switching loops and unidirectional multiplex section switching loops for information transmission.
5.5 The channel used for line longitudinal current differential protection is prohibited from adopting the self-healing function of channel switching loop mode.
5.6 When the automatic switching optical network (ASON) is used for the transmission line longitudinal current differential protection information, the following requirements shall be met.
a) The method of “demolition before construction” should be adopted. after the business working channel fails, the two-way working channel shall be dismantled first (that is, the number of business
According to the flow channel), the restoration channel is automatically established (in the case of a working channel failure, after rerouting, the service data flow
New channel) to replace the faulty working channel.
b) After the working channel is removed, the restoration channel should be established after the preset waiting time to ensure that the line longitudinal current differential protection device can obtain
Learn the abnormal status of the channel and form abnormal records of the channel.
c) The standby channel adopts a preset route, and the channel delay of the preset route should meet the protection delay requirements.
d) The channel sending and receiving routes are always the same before and after channel switching.
5.7 During normal operation, the channel used for line pilot protection is prohibited to cross and self-loop at any link.
5.8 When the fiber channel related equipment that transmits relay protection information is abnormal or malfunctions, there should be an alarm signal, and the alarm signal should be connected to the monitoring system.
system.
6 Technical requirements for relay protection equipment using fiber channel to transmit information
6.1 For single-channel protection, when the communication channel is abnormal, the line pilot protection shall be withdrawn instantaneously and alarm shall be delayed. When the communication channel returns to normal,
Line pilot protection should be automatically turned on and the alarm signal should be automatically reset; for dual-channel protection, the failure of a single channel shall not affect the operation of the other channel.
If the channel fails, an alarm signal should be sent. Only when both channels are abnormal, the pilot protection function will exit.
6.2 After the received signal disappears, the return time of the contact output of the protection command interface device should not be greater than 5ms.
6.3 The information that can be consulted by the line longitudinal differential protection device must include channel delay, abnormal communication time, number of error frames, and number of lost frames for daily inspections
Detection. After the protection is activated, the device should be able to record the abnormality of the channel and the recovery time.
6.4 The information that can be consulted by the protection command interface device must include the abnormal communication time, the number of error frames, and the number of lost frames for daily inspections.
6.5 In the process of channel protection and restoration of the self-healing network, if the protected power line has an area fault, the pilot protection delay action is allowed.
6.6 Relay protection devices and digital interface devices using optical fiber communication shall provide the following technical indicators. optical wavelength, luminous power, and receiving sensitivity
It also provides optical and electrical transmission protocols.
6.7 Relay protection devices and protection command interface devices based on fiber channel transmission of information should take measures to correctly identify the opposite device and issue timely
The current channel self-loop or channel cross.
6.8 For dual-channel protection devices, if single-fiber cross-wiring or dual-fiber cross-wiring occurs in channel one and channel two, the device should give an alarm.
And lock the corresponding longitudinal protection function, as shown in Figure 6.1.
Figure 6.1 Schematic diagram of protection device channel connection
6.9 The information transmitted by the current differential protection must contain an address code, and its application layer data must have a verification function. Dual channel line protection
The protection should set the channel identification code according to the device, and the protection device automatically distinguishes different channels.
6.10 When using Fibre Channel to transmit command signals, it is necessary to add related checks to ensure the reliability of transmission commands.
7 Technical requirements for the interface between relay protection and optical fiber communication network
7.1 The digital communication interface between the protection device and the optical fiber communication network shall comply with the ITU-T G.703 standard.
7.2 The protection device shall protect the internal clock, and the communication clock setting method.
7.2.1 When using a dedicated optical fiber mode, the protection device should use an internal clock as the transmission clock.
7.2.2 When using the multiplex channel mode, at least one side of the protection device should use the internal clock as the transmission clock; the SDH equipment should be turned off and then
Timing function.
7.3 For equipment supporting 2M optical interface, the 2Mb/s optical signal adopts unframed optical signal, and the nominal bit rate of the digital signal of the relay protection device
The working wavelength range is in.
8 Technical requirements for connection of relay protection devices and communication terminal equipment
8.1 The relay protection design using optical fiber channel shall include. optical cable for interface connection, optical fiber distribution frame, shielded wire and digital interface device.
8.2 The dedicated optical fiber for line protection should be single-mode optical fiber, and the optical cable entering the control building in the substation or power plant should be non-metallic optical cable.
8.3 After the optical fiber enters the control building of the substation or power plant, it should be connected to the optical fiber distribution frame (or branch box). From optical fiber distribution frame to relay protection equipment
Indoor optical cables should be used in the room, and pigtails can be used for connection in the same cabinet.
8.4 Using single-mode pigtails for communication should adopt FC connection.
8.5 Protective measures must be taken to prevent the tail fiber from breaking and rat bites when exiting the screen.
8.6 The loss between the protection device and the optical fiber distribution frame should be below 0.5dB, and the loss of the movable connector of the optical fiber is generally below 0.5dB.
8.7 When the connection distance between the relay protection device and the optical fiber communication terminal equipment is greater than 50m, or when passing through a strong electromagnetic interference zone, optical cable connection shall be adopted.
Sufficient spare cores should be reserved for connecting optical cables. The connection between the optical cable and the equipment shall be protected against damage by external forces. The connecting optical cable should be
In the cable trench in the power station or power plant.
8.8 The digital interface device should have obvious device abnormal alarm signals, including optical port abnormality, electrical port abnormality, etc.
8.9 The digital interface device should be close to the communication equipment screen cabinet.
8.10 The digital interface device should be screened separately according to the connected communication terminal equipment.
8.11 The digital interface device and the digital distribution frame should be connected by a coaxial cable with a characteristic impedance of 75Ω.
One side of the shielding layer is grounded with the housing of the digital interface device, and the other side is grounded through the digital distribution frame.
8.12 The housing of the digital interface device shall be grounded reliably, and the equipotential grounding network shall be used with the communication terminal equipment and the digital distribution frame.
8.13 Requirements for power supply layout of digital interface devices.
8.13.1 Communication -48V DC power supply should be used, and the positive pole of the power supply should be connected to the grounding copper bar of the communication room.
8.13.2 When the protection device adopts a single channel, the two sets of protection corresponding digital interface devices on the same line should be screened separately, and the
Independent power supplies corresponding to the terminal; when a single set of protection devices adopts dual channels, the digital interface devices corresponding to the two channels should also be grouped separately
Screen, and use independent power supplies corresponding to the communication terminal. When all the digital interface devices have one screen, two sets of protection for the same line
The digital interface devices corresponding to the protection should use independent power sources corresponding to the communication terminals.
8.13.3 When there are two sets of communication terminal equipment, the digital interface device must use the same power supply as the connected communication terminal equipment.
8.13.4 The power supply to the digital interface device should avoid series power supply, and each power supply should have an independent branch switch.
8.14 The digital distribution frame (DDF) and optical fiber distribution frame (ODF) used for protection must be provided with obvious reminders.
8.15 The cross-sectional area of the coaxial cable between the digital interface device and the photoelectric conversion interface device of the optical communication equipment should be not small along the line.
For a 100mm2 copper cable, the two ends of the copper cable are respectively connected to the photoelectric conversion interface cabinet and the grounding copper bar of the optical communication equipment (digital distribution frame),
Reliably connect with the shielding layer of the coaxial cable. In order to ensure the consistency of the ground potential of the digital interface device and the optical communication equipment (digital distribution frame),
The photoelectric conversion interface cabinet and the optical communication equipment should be connected to the main ground network at the same point. Focus on checking whether the coaxial cable is well grounded to prevent grid failure
The differential protection communication is interrupted due to poor contact of the shielding layer.
9 Fibre Channel configuration principles
9.1 When the fiber core resources allow and the fiber core length is less than 50km, the longitudinal protection can adopt the special fiber method.
9.2 When two sets of protection devices on the same line use multiplexed channels, two sets of SDH equipment should be configured. SDH equipment should adopt the “1 1” method
式configuration.
9.3 When the channel resources allow, it is recommended to adopt the dual channel mode.
9.4 For single-channel protection, the channels corresponding to the two sets of protection devices on the same line shall be independent of each other, including power supply, equipment and communication routing.
Independence. For dual-channel protection, the two channels of the same protection device should be independent of each other, including the independence of power supply, equipment and communication routing. Do not
Same as OPGW, including two OPGW cables erected on the same tower are regarded as different routes.
9.5 The Fibre Channel of this voltage level is preferred.
10 Fibre Channel Testing
10.1 According to the requirements of DL/T 547, when the fiber channel is completed and put into production, regular inspection or adjustment, the channel should be tested according to the requirements and the test
The results are archived. Before the channel plan is adjusted, or after the unplanned adjustment, the communications major shall notify the protection major in time.
10.2 Test items.
e) Protection device, protection command interface device and digital interface device luminous power and received power test
Test the luminous power and received power of the optical communication port of the protection device, the command interface device and the digital interface device, and com...
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