NB/T 31145-2018Specification for coding of identification system for wind power projects (English PDF)

Foreword

This document was issued on 6 June 2018 by the National Energy Administration of the PRC and takes effect on 1 October 2018.

It is a NB/T standard: recommended rather than compulsory, but it is the text a Chinese reviewer applies when assessing a submission.

It is classified under ICS 27.180, Chinese classification P 61.

This standard was drafted in accordance with the rules given in GB/T 1.1-2009 Directives for standardization - Part 1: Structure and drafting of standards.

This standard is under the administration of the National Energy Administration. It was proposed by, and its day-to-day administration is undertaken by, the China Renewable Energy Engineering Institute (General Institute of Hydropower and Water Resources Planning and Design). The Wind Farm Planning and Design Sub-Committee of the Wind Power Standardization Technical Committee of the energy industry is responsible for the interpretation of its specific technical content. Comments and suggestions arising during implementation should be sent to the China Renewable Energy Engineering Institute (address: No. 2 Liupukang Beixiaojie, Xicheng District, Beijing; postcode: 100120).

Organizations that drafted this standard: China Renewable Energy Engineering Institute (General Institute of Hydropower and Water Resources Planning and Design); PowerChina Northwest Engineering Corporation Limited; State Power Investment Corporation Limited; Guangzhou Jianxin Automation Technology Co., Ltd.

Principal drafters of this standard: Zhou Yi, Huang Ying, Ma Li, Shi Shuang, He Jianhui, Guo Zhenni, Si Qinghua, He Lu, Zhang Chao, Jin Weian, Fu Zhengning, Dong Delan, Huang Yong, Lyu Chang, Li Yunhong, Wang Dandi, Zhang Wanjun, Hu Jikun, Tian Weihui, Guo Zongqiang, Sang Zhiqiang, Xu Lixia, Bai Yu.

Introduction

Wind power projects are characterized by wide geographical distribution, large data volumes, many data types, strong real-time requirements and data of high value. As the number of wind power projects and the scale of installed capacity keep growing, the amount of information increases rapidly and the management of generating equipment becomes ever more complex. In order to support the transmission of data and its centralized sharing, and to achieve the interconnection and interoperability of wind power production information, the need for consistency and standardization in the identification coding of wind power projects has become increasingly urgent; a specification for the coding of a standardized, all-information identification system therefore had to be prepared.

In accordance with the requirements of the Notice of the National Energy Administration on Issuing the First Batch of the 2009 Plan for the Preparation (Revision) of Industry Standards in the Energy Field (Guo Neng Ke Ji [2009] No. 163), the drafting group undertook the preparation of the Specification for coding of identification system for wind power projects.

On the basis of complying with the relevant national standards, this standard endeavours to be of broad general applicability, so that it can be used conveniently by the engineering design personnel, the site construction personnel and the operation and management personnel of wind power generation projects.

1 Scope

NB/T 31145-2018 fixes the identification coding system for wind farms in China - the scheme by which every system, item of equipment, component, location and document on the site is given a unique reference. On a plant with dozens of turbines, each carrying the same equipment, an ad hoc naming scheme collapses quickly: the same pump exists eighty times, and the maintenance record, the drawing, the spare part and the alarm in the control room all have to point at the right one. The specification sets the scope and the defined terms and abbreviations, then the general principles of the coding system - its purpose, the structure of a code, the character set permitted, the separators between levels, and the rules on uniqueness, stability and extensibility. It then gives the identification rules themselves, distinguishing the function-related, product-related and location-related aspects, and the way the three are combined in a full designation. The general coding tables follow: the prefixes and their meaning, the classification of systems across the wind farm - the turbine and its subsystems, the collection network, the substation, the auxiliary and building services - the equipment classes within each, the component level below that, and the coding of the cable routes and the site roads. Annexes give the code tables in full. It applies to design, construction, operation and maintenance of Chinese wind farms.

This standard specifies the general principles, the identification rules, the general coding and the special coding for the coding of the identification system of wind power projects.

This standard is applicable to the coding of the identification system of wind power projects.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including all amendments) applies.

GB/T 2260 Codes for the administrative divisions of the People's Republic of China.

GB/T 50549 Standard for coding of power plant identification system.

3 Terms and definitions

The terms and definitions established in GB/T 50549, together with the following, apply to this standard. For ease of use, some of the terms and definitions given in GB/T 50549 are repeated below.

3.1 object: An entity dealt with during development, implementation, use and disposal, governed by the activities carried out over the whole life cycle of a given system.

3.2 identification: A unique symbolic marking assigned to a physical object so that it can be distinguished from other physical objects. [GB/T 50549, definition 2.0.1]

3.3 code: A combination of characters and figures arranged according to definite rules, used as the symbol that identifies a physical object. [GB/T 50549, definition 2.0.3]

3.4 level: The unit by which the coding hierarchy is divided within an identification system. [GB/T 50549, definition 2.0.14]

3.5 code classified element: A data character having a classifying function, taken from the upper-case letters of the English alphabet or from the Arabic numerals.

3.6 code number element: A data character having a numbering function, taken from the upper-case letters of the English alphabet or from the Arabic numerals.

3.7 system: A whole made up of physical objects of the same kind arranged in definite relationships and possessing a definite function. [GB/T 50549, definition 2.0.7]

3.8 component: A constituent element of a piece of equipment, including the assembled parts or the electronic elements within that equipment. [GB/T 50549, definition 2.0.11]

3.9 installation unit: An individual item of equipment as dealt with in construction and erection. [GB/T 50549, definition 2.0.15]

3.10 location: The space that a piece of equipment is intended to occupy or has come to occupy.

3.11 wind power generation unit: An independent unit made up of a single main transformer together with the wind turbine generator sets and the distribution equipment connected to its low-voltage side.

3.12 wind turbine unit: The smallest unit in the electric power production process, made up of a single wind turbine generator set.

3.13 auxiliary system: A process system, building or structure ancillary to the main process, which directly supports the production of the wind power project.

3.14 ancillary system: A process system, building or structure which indirectly supports the production of the wind power project and is not directly related to the main process. [GB/T 50549, definition 2.0.18]

4 General principles

4.1 The identification system of a wind power project shall provide coded identification for the equipment, the components and the buildings and structures of every production system of the project, as well as for the important service and living facilities and their buildings and structures.

4.2 The identification system of a wind power project shall be divided into two types: process-related identification (function and kind of equipment) and installation-location identification.

4.3 The identification system of a wind power project shall possess uniqueness, uniformity and extensibility.

4.4 The coding format of the identification system of a wind power project may be determined according to the actual scale of the project, the composition of the coding system of the project being fixed within the simplified framework permitted by this standard.

4.5 The identification of a wind power project shall be implemented progressively, stage by stage, through the feasibility study, the tendering design, the construction drawing design, the as-built drawing and the production and operation stages.

5 Identification rules

5.1.1 Attributes of object elements: An object possesses three natural element attributes, namely its inherent function, its name and the position it occupies; these are the three elements of the object.

5.1.2 Relationships among object elements: The three elements of an object - the function attribute, the name attribute and the position attribute - have no natural correlation with one another; they can be linked together by means of the coded identification. The names corresponding to the element attributes of an object within the coded identification are respectively as follows.

The function element attribute of an object corresponds to the system identification.

The name element attribute of an object corresponds to the identification of the kind of equipment.

The position element attribute of an object corresponds to the installation-location identification.

5.2.1.1 Process-related coded identification is made up of two parts, namely: a) the function code, also called the system code, which according to the function of a building or structure, of mechanical equipment (device) or of electrical equipment (device) within the wind power project and according to the system to which it belongs, provides the associated coded identification, expressed in the level 0 and level 1 code segments; b) the name code, which reflects the name attribute of the kind of object and provides the coded identification of the kind according to the name of the object, divided into the equipment code and the component code.

1) The equipment code is the code that assigns a fixed name to a piece of equipment (device) made up of several components taken together - for example the coded identification of a wind turbine generator set, a steel tower or a control cabinet; it is expressed in the level 2 code segment.

2) The component code is the code that assigns a fixed name to an element of a single function; it is expressed in the level 3 code segment.

5.2.1.2 Installation-location coded identification is the coding that reflects the geographical distribution of buildings and structures, equipment (devices) and components (elements); it is made up of two parts. The installation-location coded identification uses the prefix character plus sign to mark it, and it covers the geographical position of the wind power project, the division of the area positions inside the project and the installation locations of the objects; it is divided as follows.

a) The regional position, which is the coded identification of the area positions reflecting the geographical placement of the wind power project and the distribution of the main objects of the project, expressed in the level 0 and level 1 code segments.

b) The subdivision of the areas inside the site, which is the coded identification of the spatial positions reflecting the further subdivision of the areas inside the wind power project, expressed in the level 2 code segment.

c) The installation location, used to identify the installation position of each individual object within a definite space; depending on the object it is called either the installation location code or the installation point code, and it is expressed in the level 3 code segment. Specifically: 1) the installation location code is used to express the installation-location identification of equipment (devices) possessing complete system functions, such as the wind turbine tower, the step-up transformer of the generating set, the power transformer, the junction cabinet, the control panel or the water pump within a spatial area; 2) the installation point code is used to express the installation-location identification of components (elements) having a single function, such as the detectors in fire-fighting areas and inspection areas or the cameras within a spatial area.

Footnote 1) to 5.2.1.2: the installation location of a component (element) mounted on (or inside) a piece of equipment (device) is expressed by extending the coding in the segments following level 3; it is advisable to follow the concrete structure of the equipment (device) and to mark the local subdivision of the installation location by alternating one letter with one figure (plus sign, A, N, A, N).

5.2.2 Levels of coded identification: Process-related coded identification is made up of the additional-level, level 0, level 1, level 2 and level 3 data characters, whereas installation-location coded identification is made up of the level 0, level 1, level 2 and level 3 data characters. The correspondence between the attributes of the object, the process-related identification and the installation-location identification on the one hand and the levels of the coded identification on the other is shown in Figure 1.

Figure 1, correspondence between the object attributes, the process-related identification, the installation-location identification and the levels of the coded identification, shows the sequence of levels - additional level, level 0, level 1, level 2 and level 3 - with the data character names T, G, F, A and B respectively. In the process-related identification these correspond to the characteristic code, the whole-site code, the function (system) code, the equipment (device) code and the component (element) code; the first group expresses the function (system) attribute of the object and the second group expresses the name (kind) attribute of the object. In the installation-location identification they correspond to the regional position code, the in-site subarea code and the installation location code or installation point code, which together express the position (installation location) attribute of the object.

5.3.1 Coding format: The coding format of the identification system is shown in Figure 2.

Figure 2, coding format of the identification system, sets out for each level in sequence - additional level (characteristic code, data character T), level 0 (whole-site code, data character G), level 1 (system or area, installation unit; data characters F0, F1, F2, F3, FN), level 2 (equipment code or grid square, room code; data characters A1, A2, AN, A3) and level 3 (component code or installation location code; data characters B1, B2, BN) - the type of data character admitted in each position, namely A for a letter or N for a figure, together with the prefix characters and the separators that introduce each segment.

5.3.2.1 The identification characters are the collective name of the prefix characters and the separators of the identification system coding; they identify the characteristic of the project and the coding of the function (system) attribute, of the name attribute and of the position attribute of the object. They are as follows.

a) The number sign is the prefix character reflecting the characteristic code of the identification and shall not be omitted in an offshore wind power project.

b) The equals sign is the prefix character of the coded identification of the process-related function (system) of an object and shall not be omitted in the coding annotation.

c) The plus sign is the prefix character or separator of the coded identification of the geographical placement of the project and of the spatial subdivision of the installation of an object, and shall not be omitted in the coding annotation.

d) The minus sign is the separator of the coded identification of the kind name of the process-related equipment (device) and component (element) of an object, and may be omitted in the coding annotation.

e) The middle dot is the separator of the coded identification of the installation location of equipment (devices) and components (elements); it shall not be omitted in the coding annotation, but the plus sign may be used in its place for the identification.

5.3.2.2 The data characters, being the main body of the identification coding, are of two types: a) upper-case letters of the English alphabet, the generic symbol A denoting a single letter character, with the letters I and O prohibited (except where specifically defined for component coding); b) Arabic numerals, the generic symbol N denoting a single numeral character, the leading character zero within a string of figures not being omitted.

5.4.1.1 Classification coding elements: The data characters T, G, F0, F1, F2, F3, A1, A2, B1 and B2 are classification coding elements and possess a classifying function. The classification coding elements of the data characters are shown in Figure 3.

The classification coding elements shall not be defined by the user; they shall comply with the provisions of Annex A or Annex B of this specification.

5.4.1.2 Numbering coding elements: The data characters F0, FN, AN, A3 and BN are numbering coding elements and possess a numbering function. The numbering coding elements of the data characters are shown in Figure 4.

The numbering coding elements shall comply with the provisions of Annex A of this standard; those not so provided for shall be defined by the user, and the following rules shall be observed.

a) When one of the preceding coding elements changes, the numbering shall start again from the beginning.

b) The numbering may be continuous or may be arranged in groups of segments.

c) The numbering need not be uninterrupted (it may be allocated in segments by subsystem).

d) Once the numbering rule has been established, it shall not be altered even if various changes occur in the project during the design process.

e) Once the number of digits of a numerical code has been fixed, the redundant zeros of the number shall not be omitted.

5.4.2.1 Process-related coded identification: a) The process-related coded identification of a wind power project is made up of the strings of data characters introduced by the prefix characters number sign and equals sign and by the separator minus sign. The expanded format and content of the process-related identification coding and the meaning of each code are as follows.

1) The additional level of the process-related identification is the characteristic code of the project; it is used only for offshore wind power projects and its data character code is zero.

2) Level 0 of the process-related identification is the whole-site code; for the index see Annex A.1.

3) Level 1 of the process-related identification is the system code; for the index see Annex A.2.

4) Level 2 of the process-related identification is the equipment code; for the index see Annex A.3.

5) Level 3 of the process-related identification is the component code; for the index see Annex A.4.

b) The expanded format and content of the process-related identification coding are shown in Figure 5.

Figure 5, expanded format and content of the process-related identification coding, identifies position by position the prefix character of the characteristic code, the offshore wind power project identification, the process-related prefix character, the category code, the code of the class to which the item belongs, the main system code, the system code, the subsystem code, the number or unit serial number, the separator, the equipment category code, the equipment classification number, the equipment additional code, the separator, the component group code and the component group number.

5.4.2.2 Installation-location coded identification: The installation-location coded identification of a wind power project shall be made up of the four levels of coding data characters introduced by the prefix character plus sign and the separator middle dot. Its meaning is expressed as follows.

a) The installation-location coded identification of a wind power project has the same structural form as the process-related system identification coding; the meaning of each level of the coding is as follows.

1) Level 0 of the location identification is the coded identification of the attributes of domestic inland areas, of sea areas and of foreign countries; for the index see Annex B.1.

2) Level 1 of the location identification is the code of the geographical position area; for the index see Annex B.2.

3) Level 2 of the location identification is the identification code of the installation space within the subareas of the site; for the method see Annex B.3.

4) Level 3 of the location identification is the identification code of the specific layout and installation position of electromechanical equipment (devices) or components (elements); for the method see Annex B.4.

b) The expanded format and content of the installation-location identification coding are shown in Figure 6.

Figure 6, expanded format and content of the installation-location identification coding, identifies position by position the prefix character of the identification type, the land or sea area code, the code of the province where the project is situated (or the country code), the latitude subdivision code, the longitude subdivision code, the separator or prefix character, the subdivision code of the site area, the storey or site elevation code, the vertical plane coordinate code of the room or grid square, the horizontal plane coordinate code of the room or grid square, the additional code, the separator or prefix character, the installation row code of the cubicle or equipment, and the individual serial number code of the cubicle or equipment.

5.5.1 Feasibility study and design stage: The feasibility study and design stage is the starting stage of the coding; its main task is to lay down the coding rules and to complete the division into systems. Its main work shall include: a) determining the coding plan of the project; b) determining the whole-site code G of the project; c) determining the coding scope and depth for each discipline and preparing the system codes and the regional codes; d) marking the identification codes on the main system drawings or layout drawings of each discipline (a recommended scheme only), or providing a list of system codes; e) preparing and issuing the project index.

5.5.2 Tendering and construction drawing design stage: This stage is the important stage in which the coding data are formed in full; its main task is to complete the detailed coding of the project design stage, including all buildings and structures and the main equipment. Its main work shall include: a) updating and maintaining the project agreement and the project index; b) completing, before tendering, the equipment codes of the equipment to be tendered and making clear the coding requirements for that equipment; c) completing the coding of the buildings and structures and of the equipment (including the main components) requiring identification for each discipline, providing the list of process-related codes and installation-location codes and marking them on the drawings; d) obtaining from the manufacturers of the main equipment the equipment codes and component codes of the equipment they supply; e) collecting the codes of all disciplines and completing the coding list or coding manual of the whole project, together with the project agreement and the project index.

5.5.3 As-built drawing stage: The as-built drawing stage is the important stage in which the coding data are corrected; its main task is to complete the correction and updating of the coding of the project design stage. Its main work shall include: a) updating and maintaining the project agreement and the project index; b) perfecting all the identification codes of each discipline, providing the lists of process-related codes and installation-location codes and marking them on the drawings; c) collecting the updated coding data from site and organizing and completing the coding list or coding manual of the whole project, as well as the final version of the project agreement and the project index.

5.5.4 Production and operation stage: After the wind power project has been put into production and operation, the stage of use, maintenance and extension of the coding begins; the main task is to perfect, on the basis of the coding results of the design stage, the identification coding required for the daily operation, maintenance and overhaul work of the project. Its main work shall include: a) reviewing or accepting the coding data of the design stage and, where necessary, organizing or supplementing the relevant data; b) preparing in a unified way the nameplates of the coded equipment and hanging them on the equipment before it is formally put into operation, thereby completing the identification work on site; c) organizing and completing the breakdown of equipment and the coding of components required during the operation and maintenance stage, so as to perfect continuously the identification system of the wind power project; d) having the software integrator or supplier assist in completing the establishment and day-to-day maintenance of the coding database.

6 General coding

6.1.1.1 Foundations: The identification coding of foundations shall be classified according to the process systems set out below.

a) Foundations of wind turbine generator sets, including: 1) spread foundations; 2) beam-and-slab foundations; 3) pile foundations; 4) prestressed rock anchor foundations; 5) prestressed cylindrical foundations; 6) monopile foundations; 7) high pile cap foundations; 8) gravity-type foundations; 9) tripod or multi-leg foundations; 10) jacket foundations; 11) floating foundations; 12) other foundations.

b) Foundations of the step-up transformer installation of the wind turbine generator set.

c) Foundations of the collector lines, including: 1) concrete pole foundations; 2) steel tubular pole foundations; 3) lattice tower foundations; 4) other foundations.

d) Foundations of the step-up substation of the wind power project (footnote 2: including the switching station, the same below), including: 1) foundations of the buildings of the 500 kV system switchgear; 2) foundations of the buildings of the 330 kV system switchgear; 3) foundations of the buildings of the 220 kV system switchgear; 4) foundations of the buildings of the 110 kV system switchgear; 5) foundations of the buildings of the 66 kV system switchgear; 6) foundations of the buildings of the 35 kV system switchgear; 7) foundations of the buildings of the distribution system; 8) foundations of the transformer buildings and structures; 9) other foundations.

6.1.1.2 Buildings and structures: The identification coding of buildings and structures shall be classified as set out below.

a) Towers of the wind turbine generator sets, including: 1) the main part of the tower; 2) the ancillary parts of the tower; 3) other parts.

b) Cable routes, including: 1) cable galleries; 2) cable culverts; 3) cable trenches; 4) cable trays; 5) cable racks; 6) other cable routes.

c) Structures of the collector lines, including: 1) concrete poles of the collector lines; 2) steel tubular poles of the collector lines; 3) lattice towers of the collector lines; 4) other structures of the collector lines.

d) Structures for power transmission, including: 1) outgoing line gantries; 2) gantries (supports) of the distribution equipment; 3) other gantries (supports).

e) Buildings of the centralized control centre or of the step-up substation, including: 1) the multipurpose building; 2) the production building; 3) ancillary buildings; 4) other buildings.

f) Other buildings and structures, including: 1) the wind measuring mast; 2) navigation marks; 3) berthing platforms; 4) helicopter platforms; 5) ladders; 6) living and office containers; 7) accident oil pits; 8) others.

6.1.2.1 Rotor system of the wind turbine generator set: The identification coding of the rotor system of the wind turbine generator set shall be classified according to the systems set out below.

a) The rotor (including hub) system, comprising: 1) the blades; 2) the hub; 3) the nose cone or spinner; 4) the connecting structural parts; 5) others.

b) The pitch mechanical system, comprising: 1) the pitch bearing; 2) the pitch drive device; 3) the pitch gearbox; 4) the brake; 5) the heater; 6) others.

c) The pitch control system, comprising: 1) the pitch adjustment equipment; 2) the control cabinet; 3) the electrical control; 4) others.

6.1.2.2 Nacelle system of the wind turbine generator set: The identification coding of the nacelle system of the wind turbine generator set shall be classified according to the systems set out below.

a) The nacelle assembly, comprising: 1) the nacelle frame structural parts; 2) the nacelle cover; 3) the hoist inside the nacelle; 4) others.

b) The transmission system, comprising: 1) the main shaft; 2) the main bearing; 3) the coupling; 4) others.

c) The speed-changing system, comprising: 1) the low-speed transmission shaft; 2) the high-speed transmission shaft; 3) the gearbox (including its accessories); 4) others.

d) The yaw system, comprising: 1) the yaw gear; 2) the yaw bearing; 3) the yaw drive device; 4) others.

e) The braking system of the wind turbine generator set, comprising: 1) the brake; 2) the hydraulic station of the brake; 3) others.

f) The auxiliary systems of the generating set, comprising: 1) the auxiliary power distribution system of the nacelle; 2) the converter control cabinet; 3) the CMS control cabinet; 4) the fire-fighting system of the nacelle; 5) the condition monitoring system of the nacelle; 6) the nacelle control cabinet; 7) others.

g) The lubrication system, comprising: 1) transmission lubrication; 2) pitch lubrication; 3) yaw lubrication; 4) other lubrication.

h) The sealing, heating and cooling systems.

i) The hydraulic system.

j) The measurement and control system of the wind turbine generator set, comprising: 1) the wind measuring system; 2) pitch control; 3) speed-change control; 4) yaw control; 5) the electrical system of the tower; 6) others.

6.1.3.1 Power generation system: The identification coding of the power generation system shall be classified according to the systems set out below, beginning with a) the generator set (device) system, comprising 1) the stator and the further items that continue on the following pages of the standard.