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Code for construction and acceptance of series capacitor installation electrical equipment installation engineering
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GB 51049-2014
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PDF similar to GB 51049-2014
Standard similar to GB 51049-2014 GB 50168 GB 50303 GB 50254 GB 50170 Basic data | Standard ID | GB 51049-2014 (GB51049-2014) | | Description (Translated English) | Code for construction and acceptance of series capacitor installation electrical equipment installation engineering | | Sector / Industry | National Standard | | Classification of Chinese Standard | P91 | | Word Count Estimation | 43,418 | | Date of Issue | 12/2/2014 | | Date of Implementation | 8/1/2015 | | Quoted Standard | GB 50147; GB 50149; GB 50150; GB 50169; GB 50171; GB 50205; GB 50300; GB/T 8287.1; GB/T 15972 | | Regulation (derived from) | Housing and Urban-Rural Development Ministry Bulletin No. 642 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This Standard applies to construction and acceptance of AC voltage level of 220kV ~ 750kV series capacitor compensation device. | GB 51049-2014: Code for construction and acceptance of series capacitor installation electrical equipment installation engineering
---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.
1 General
1.0.1 In order to ensure the construction quality of the installation project of the series capacitor compensation device, promote the progress of the installation technology, and ensure the safe operation of the equipment, this specification is formulated.
1.0.2 This specification applies to the construction and acceptance of series capacitor compensation devices with AC voltage levels of 220kV ~ 750kV.
1.0.3 The construction and acceptance of the compensation device for series capacitors shall not only comply with the provisions of this code, but also comply with the relevant current national standards.
2 terms
2.0.1 Series capacitor compensation device (SC) series capacitor installation
The device composed of capacitor bank and its protection and control equipment in series in the transmission line, referred to as series compensation device or series compensation, can be divided into fixed series capacitor compensation device and thyristor controlled series capacitor compensation device.
2.0.2 Fixed series capacitor compensation device (FSC) fixed series capaci-tor installation
A device that connects capacitors in series in the transmission line and is equipped with auxiliary equipment such as bypass switches, isolating switches, series compensation platforms, supporting insulators, and control and protection systems, referred to as fixed series compensation.
2.0.3 Thyristor controlled series capacitor installation (TCSC) thyristor controlled series capacitor installation
The capacitors connected in parallel with thyristor valves and their reactors are connected in series in the transmission line, and are equipped with auxiliary equipment such as bypass switches, isolation switches, series compensation platforms, supporting insulators, control protection systems, etc., referred to as controllable series compensation.
2.0.4 SC platform
A structural platform with sufficient insulation level to the ground is used to support the related equipment of the series compensation device.
2.0.5 metal oxide varistor (MOV) metal-oxide varistor
A capacitor overvoltage protection device composed of a resistor whose resistance value has a nonlinear relationship with the voltage, referred to as a voltage limiter.
2.0.6 spark gap (GAP) spark gap
Controlled trigger gap or gap system that carries the load current or fault current of the protected part for a specified time to prevent capacitor overvoltage, or metal oxide voltage limiter overload.
2.0.7 damping device
A device used to limit the magnitude and frequency of capacitor discharge current generated during bypass operation of capacitor bank protection equipment and to rapidly decay it. It generally includes damping reactors and damping resistors.
2.0.8 optical fiber column
It is used for the communication between the relevant equipment on the series compensation platform and the measurement, control and protection equipment on the ground, as well as the equipment for optical energy transmission.
2.0.9 thyristor valve
Electrical and mechanical combination of thyristor level, complete with connections, auxiliary parts and mechanical structure, can be connected in series with thyristor valve controlled reactor.
2.0.10 Thyristor-controlled reactor thyristor-controlled reactor
The reactor connected in series with the thyristor valve can continuously change the equivalent inductive reactance by controlling the firing angle of the thyristor valve to realize the continuous adjustment of the equivalent capacitance of the thyristor-controlled series capacitor compensation device, referred to as the valve-controlled reactor.
2.0.11 ion exchange equipment
A water treatment device that uses ion exchange resins for ion exchange treatment to remove ionic impurities in water.
2.0.12 Deionized water deionized water
Pure water from which salts and some silicic acid and carbon dioxide have been removed is also called deeply desalinated water.
2.0.13 insulation water pipe
It is used to provide cooling water channels for components such as thyristors in the thyristor valve chamber on the series compensation platform, and organic composite insulating materials are generally used.
3 Basic Regulations
3.0.1 The installation of each component of the series compensator should be carried out according to the approved design drawings and product technical documents.
3.0.2 The transportation, loading, unloading and storage of equipment and equipment shall comply with the requirements of this specification and product technical documents. When the manufacturer has special regulations, it shall be implemented according to the regulations of the manufacturer.
3.0.3 Equipment and equipment should have information such as nameplates, installation instructions, factory test reports and qualification certificates.
3.0.4 The equipment and equipment should be inspected in time after arriving at the site, and should comply with the following regulations.
1 The packaging and sealing are good;
2 Open the box for inspection and inventory, the specifications should meet the design requirements, and the accessories and spare parts should be complete;
3 The product technical documents are complete;
4 Perform visual inspection according to the provisions of Article 4.1.1 of this code.
3.0.5 A construction plan should be prepared before construction. The prepared construction plan shall meet the requirements of this specification and product technical documents.
3.0.6 Construction projects related to the installation of series compensation devices shall comply with the following regulations.
1 Comply with design and equipment requirements.
2 The quality of construction projects related to equipment installation shall comply with the relevant provisions of the current national standard "Unified Standards for Construction Quality Acceptance of Construction Projects" GB 50300.
3 Before the equipment is installed, the construction project shall meet the following conditions.
1) The roof and floor should be constructed without leakage;
2) The indoor floor, doors, windows, walls, etc. shall be constructed and meet the design requirements. For equipment with special requirements, all decoration work shall be completed;
3) The equipment foundation, trenches, embedded parts, embedded pipes, and reserved holes (holes) should be constructed and meet the design requirements, and there should be no water and debris in the trenches;
4) The heating, ventilation, lighting, water supply and drainage, etc. that affect the equipment installation should be completed and should meet the design requirements.
3.0.7 The fasteners used for equipment installation shall be galvanized or stainless steel products; outdoor fasteners and exposed anchor bolts shall be hot-dip galvanized products.
3.0.8 Insulators should be inspected and assembled before installation. Porcelain parts should have no cracks or breakage, and metal flanges should have no rust, trauma or casting sand holes. The glued parts of porcelain parts and metal flanges should be firm and dense, and should be coated with good waterproof glue. The flange joint surface should be flat, without trauma or casting sand holes. The verticality of the porcelain bottle should meet the requirements of the current national standard "Indoor and outdoor post insulators for users with a nominal voltage higher than 1000V - Part 1.Tests for porcelain or glass insulators" GB/T 8287.1.
3.0.9 The handover test of each high-voltage electrical equipment and components, control protection system, etc. in the series compensation device shall comply with the current national standard "Electrical Equipment Handover Test Standard for Electrical Installation Engineering" GB 50150 and the relevant provisions of product technical documents.
3.0.10 The construction and acceptance of the busbar on the series compensation platform shall comply with the provisions of the current national standard "Code for Construction and Acceptance of Busbar Devices in Electrical Installation Engineering" GB 50149, as well as the relevant provisions of design and product technical documents.
3.0.11 Equipment hoisting is strictly prohibited in rainy and snowy weather, or in strong winds of grade six or above.
4 series compensation platform
4.1 Inspection before installation
4.1.1 Field equipment unpacking inspection should meet the following requirements.
1 The appearance inspection of galvanized components and accessories should be free of damage and deformation, and the galvanized layer should be intact, free of rust, peeling off, and consistent in color. The overall dimensions, bolt holes and positions, connector positions, etc. of the components shall meet the design requirements.
2 The cable-stayed composite insulator should be glued tightly without degumming or glue leakage, and it should be firmly connected with the end fittings, and the umbrella skirt should not be damaged.
3 There should be no obvious ripples on the surface of the ball socket and ball head of the ball joint, and the local unevenness should not be greater than 1.5mm, and there should be no zinc tumors, zinc slag and sharp burrs.
4.1.2 The foundation positioning axis shall meet the following requirements.
1 The deviation of the foundation axis of a single platform shall not be greater than 5mm.
2 The spacing deviation of a single foundation anchor bolt should not be greater than 2mm, and the height deviation should not be greater than 2mm.
4.1.3 When the connecting bolts of the main girder are high-strength bolts, the anti-slip coefficient test and re-inspection of the friction surface of the high-strength bolt connection should be carried out according to the current national standard "Code for Construction Quality Acceptance of Steel Structure Engineering" GB 50205.
4.2 Installation and adjustment of series compensation platform insulators
4.2.1 The installation of insulator base should meet the following requirements.
1 The installation height of the lower ball joint of the single-phase platform should meet the design requirements, the horizontal deviation of adjacent ball joints should not be greater than 2mm, the maximum deviation of the single-phase platform should not be greater than 5mm; the axis deviation should not be greater than 5mm.
2 The horizontal deviation of the cable-stayed insulator base should not be greater than 20mm, and the axis deviation should not be greater than 10mm.
4.2.2 During the installation of post insulators, protective measures should be taken for porcelain parts.
4.2.3 The bending vector of installed post insulators should not exceed 10mm.
4.2.4 The verticality deviation of installed post insulators should not exceed 10mm.
4.2.5 The deviation between the top center distance of each insulator and the corresponding basic nominal value should not be greater than 5mm.
4.2.6 After adjustment, the horizontal height deviation between insulators should not be greater than 2mm.
4.3 Assembly of series compensation platform
4.3.1 When installing the parallel joints of the main beam and the joint joints of the primary and secondary beams, the high-strength bolts should be tightened gradually from the center of the bolt group outward during the initial and final tightening.
4.3.2 The connection of the main girder should be kept in a straight line. After the connection, check that the bending sag of the main girder should not be greater than 10mm, and the length deviation should not be greater than 2mm.
4.3.3 Secondary beams should be installed according to the number of product installation drawings, and the spacing error of secondary beams installed on the same platform should not be greater than 2mm.
4.3.4 The secondary beam bolts can only be tightened after the main beam butt bolt torque values meet the requirements.
4.3.5 The spacing deviation of adjacent ball joints on the main beam should not be greater than 2mm, and the cumulative spacing deviation should not be greater than 10mm.
4.3.6 After the platform is assembled, check that the diagonal length of the platform should meet the requirements of the product technical documents.
4.3.7 The platform grid should be fixed flat and firm.
4.3.8 After the platform is assembled, the bolt tightening torque should meet the requirements of the manufacturer's technical documents. If the manufacturer does not provide the tightening torque, it shall comply with the relevant provisions of the current national standard "Code for Construction Quality Acceptance of Steel Structure Engineering" GB 50205.
4.4 Hoisting and adjustment of series compensation platform
4.4.1 The selection of platform hoisting methods and hoisting points should consider the force balance and deformation control of the series compensation platform.
4.4.2 The rigging should be selected according to the hoisting weight, lifting point and the included angle of the lifting rope, and the hoisting machinery should be selected according to the lifting height, range and lifting weight.
4.4.3 Before hoisting, the operation performance of the crane should be checked to confirm whether the action response performance of the safety device, brake device and alarm device is normal and reliable. All parts should run smoothly, no abnormal sound, no jamming, and flexible operation.
4.4.4 The lifting process should be stable, and the wind rope should be installed, and there should be no swinging phenomenon during the lifting process.
4.4.5 The cable-stayed insulator can only be installed and adjusted after the ball head and the ball socket are in full contact; when installing and adjusting the cable-stayed insulator, the lifting rope must always be under stress, and the cable wind rope must be temporarily fixed and assigned a special person to monitor; adjust After the completion, the cable wind rope and sling can be loosened.
4.4.6 The adjustment of cable-stayed insulators should be done in pairs.
4.4.7 After the adjustment is completed, the elongation of the damping spring should meet the requirements of the technical documents, and the maximum vertical deviation of the post insulator should not exceed 20mm.
4.5 Installation of series compensating platform accessories
4.5.1 Protective measures should be taken during installation of the platform guardrail, and the surface should be smooth and free of burrs.
4.5.2 The platform guardrail door should be firmly fixed and self-locking flexibly.
5 Electrical equipment installation
5.1 General provisions
5.1.1 The installation of electrical equipment on the platform should be carried out after the platform is stabilized.
5.1.2 The deviation between the center distance of the top of each insulator and the nominal value of the corresponding installation base should not be greater than 5mm.
5.1.3 After adjustment, the level error between insulators should not exceed 2mm.
5.1.4 The hoisting method of the equipment on the platform shall meet the requirements of the product technical documents.
5.1.5 The equipment nameplate should be located on the easy-to-observe side.
5.2 Capacitors
5.2.1 Capacitors must not be turned upside down, overturned, collided or subjected to severe vibration during transportation and loading and unloading. When the manufacturer has special regulations, it shall be shipped according to the regulations of the manufacturer.
5.2.2 The bushing and shell of the capacitor should be inspected before installation. There should be no bending or slipping of the bushing terminals, and the shell should not be deformed, corroded, cracked or oil seeped.
5.2.3 The capacitance of each capacitor should be measured before the capacitor is installed, and the capacitance difference should meet the requirements of the technical conditions.
5.2.4 The installation of the capacitor bank shall meet the following requirements.
1 Match the capacitors according to the product installation requirements of the manufacturer.
2 The wiring of the capacitor bank should be correct and consistent. The terminal connection should be symmetrical and consistent, and the capacitor terminal clamp should not be used as the connecting fitting for the connecting line.
3 The capacitor bushing should not be subjected to additional stress, and the terminal tightening torque should meet the technical requirements.
4 Each capacitor shell should be reliably connected to the specified equipotential point together with the capacitor bracket.
5 The nameplate of the capacitor should face to the side of the channel and have sequential numbers.
6 The capacitance difference between the capacitor bank and its bridge arms or unbalanced branches should meet the requirements of the technical conditions.
5.3 Metal Oxide Voltage Limiter
5.3.1 Before the installation of the pressure limiter, the protective cover used to protect the explosion-proof membrane of the pressure limiter during transportation should be removed, and the explosion-proof membrane should be intact.
5.3.2 The pressure limiter should be grouped and installed according to the technical documents or nameplate identification; the explosion-proof membrane should not be damaged during the installation process.
5.3.3 When the pressure limiter is in place, the direction of the nozzle should be unified and meet the design requirements.
5.4 Spark gap
5.4.1 The spark gap should be assembled and adjusted under the guidance of the technical personnel of the manufacturer.
5.4.2 The spark gap shell should be firmly welded without deformation or damage, and the insect-proof net body should be intact.
5.4.3 The installation and adjustment of the spark gap shall comply with the requirements of product technical documents, and shall comply with the following regulations.
1 The gap shell shall be vertical and its weight shall be evenly distributed on all post insulators;
2 The connection of each component and equipment should be standardized, correct and firm, and the tightening torque of all bolts should meet the requirements of product technical documents;
3 Graphite electrodes or copper electrodes, shields, and trigger circuit components in each gap should have good appearance and no damage;
4 The measured value of each gap distance should meet the requirements of the design and product technical documents.
5.5 Damping device
5.5.1 Damping resistors should be stacked up and down according to the requirements of product technical documents.
5.5.2 The installation of the damping reactor should be carried out in accordance with the relevant provisions of the current national standard "Code for Construction and Acceptance of High-Voltage Electrical Appliances in Electrical Installation Engineering" GB 50147.
5.6 Fiber Column
5.6.1 The installation of the fiber column shall meet the following requirements.
1 During the installation process, protective measures should be taken for the insulator shed of the fiber column;
2.The fiber column should be suspended correctly, the spring should be adjusted stably, the force should be even, and the column should have no obvious swinging phenomenon;
3 The optical fiber of the fiber column should not be subjected to external force, and the bending radius should meet the requirements;
4 The equipotential bonding conductor of the fiber optic column should be reliably connected.
5.6.2 The connection of optical fibers shall meet the following requirements.
1 The inside of the optical fiber transfer box of the optical fiber column should be clean, and the terminals should be firmly fixed;
2 The optical fiber connection of the optical fiber column should be correct, and the attenuation value should meet the relevant provisions of the current national standard "General Specification for Optical Fiber" GB/T 15972.
5.7 Current Transformers, Bypass Switches and Disconnectors
5.7.1 The construction and acceptance of current transformers, bypass switches and isolating switches shall be carried out in accordance with the relevant provisions of the current national standard "Code for Construction and Acceptance of High-Voltage Electrical Appliances in Electrical Installation Engineering" GB 50147.
5.8 Control protection system
5.8.1 The installation and wiring of the platform measurement box, control and protection chamber and its built-in screen cabinet shall be carried out in accordance with the relevant provisions of the current national standard "Code for Construction and Acceptance of Panels, Cabinets and Secondary Circuit Wiring of Electrical Installation Engineering" GB 50171.
5.8.2 The secondary cables on the platform should take shielding protection measures, and should be firmly connected and well sealed.
5.8.3 The laying of the optical fiber should meet the design requirements, and its bending radius, tensile force, connection and performance test should meet the relevant provisions of the current national standard "General Specification for Optical Fiber" GB/T 15972.
6 Installation of relevant equipment for controllable series compensation
6.1 Valve-controlled reactor
6.1.1 The construction and acceptance of valve-controlled reactors shall comply with the provisions of the current national standard "Code for Construction and Acceptance of High-Voltage Electrical Apparatus for Electrical Installation Engineering" GB 50147 and the relevant provisions of design and product technical documents.
6.2 Thyristor valve chamber
6.2.1 The valve chamber should be hoisted together with the transport reinforcement accessories as a whole, and the reinforcement should be removed after installation.
6.2.2 The valve chamber high and low pressure bushings, ventilation windows and other accessories should be installed after the valve chamber is hoisted.
6.2.3 Internal inspection shall be carried out after the valve chamber is installed, and shall comply with the following regulations.
1 The thyristor valve fixing frame should be installed well, and all equipment should not be displaced;
2 The electrical connection of the valve body and auxiliary parts should be tightened, and the force of the spring fixing the thyristor valve group should meet the requirements of the product technical documents.
6.3 Voltage divider
6.3.1 The voltage divider should be installed vertically, and the connection between the terminal on the top and the high-voltage lead wire should be reliable without additional stress.
6.3.2 The special cable, voltage divider, and terminal in the data acquisition box should be connected correctly and firmly.
6.3.3 The cables should be shielded and protected, and should be firmly and reliably connected to the base of the voltage divider and the data acquisition box.
6.4 Water cooling system
6.4.1 The installation of cooling equipment shall comply with the following regulations.
1 The installation axis of the base of each unit assembly of the equipment should meet the design requirements, the base and the foundation should be fixed firmly, and the grounding should be reliable;
2 The circulating pump should be tested in the presence of medium, and the medium or substitute medium for the test run should comply with the technical regulations of the product;
3 The installation of ion exchangers, filters, oxygen removal devices and testing instruments shall comply with the technical regulations of the product, and the nitrogen pressure shall comply with the technical regulations of the product;
4 The verticality of the air-cooled equipment support should not be greater than 1.5‰ of the height of the support, and the horizontality deviation of the radiator installation should not be greater than 1mm/m;
5 The steering of the fan should be correct, and the speed should meet the technical regulations of the product.
6.4.2 The installation of insulating water pipes shall meet the following requirements.
1 The equipotential leads at the upper and lower ends of the water pipe should be reliably connected;
2 The connecting ends at both ends of the water pipe and the end of the circulating water pipe should be reliably connected;
3 The tensile force of the wind deflection device at the lower end of the suspended water pipe shall meet the requirements of the product technical documents.
6.4.3 The installation of pipelines shall meet the following requirements.
1.The sealing cover of the pipeline packaging should be tight. When opening during the installation process, the exposed time inside the pipeline should be reduced. The inner wall of the cooling pipeline should be cleaned according to the technical regulations of the product to ensure that the inner wall is clean.
2 The position of pipe supports and hangers should be correct, the spacing should meet the design requirements, and the installation should be smooth and firm.
3 Flange connections should be used between water-cooling pipes; flange connections should be concentric with the pipes and the flanges should be kept parallel, and the deviation should not be greater than 1.5‰ of the outer diameter of the flanges, and should not be greater than 2mm. Flange bolts should not be used Forced connection; After the pipeline is installed, the pipeline and valve should not bear additional stress.
4 The sealing surface of the pipe flange should not be damaged, the sealing ring should be installed correctly, the connection should be tight, and there should be no leakage. The use of sealant should comply with the technical regulations of the product.
5 Pipes passing through walls and floors should be protected with sleeves. The sleeves should be exposed to the wall or ground, and the exposed length should be greater than 50mm. The gap between the pipes and the sleeves should be filled with flame-retardant soft materials.
6 After the pipeline is installed, the force on each support and hanger should be uniform, without obvious deformation, and should be in close contact with the pipeline.
7.The grounding of the pipeline should be reliable, and the flanges of the pipeline should be connected by jumper wires. The cross-sectional area should not be less than 16mm2 and should meet the technical regulations of the product.
6.4.4 The water injected into the cooling system should be deionized water, and its conductivity should meet the technical specifications of the product. If there is no technical regulation, the conductivity of deionized water should not be greater than 0.2μs/cm.
6.4.5 When the operating environment temperature is lower than 5°C, an anti-freezing cooling medium shall be used according to the design requirements.
6.4.6 The power supply of the cooling system should meet the design requirements, the dual power supply should be able to realize automatic switching, and the water pump and the standby water pump should be switched on and off normally.
6.4.7 After the installation of cooling equipment, pipes and valve body cooling water pipes is completed, and the visual inspection is qualified, the overall sealing test of the cooling pipes shall be carried out. The test pressure and duration should comply with the technical specifications of the product, and the piping system should have no leakage.
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