GB/T 50063-2017 English PDFUS$1819.00 · In stock
Delivery: <= 13 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 50063-2017: Code for design of electrical measuring device of power system Status: Valid GB/T 50063: Historical versions
Basic dataStandard ID: GB/T 50063-2017 (GB/T50063-2017)Description (Translated English): Code for design of electrical measuring device of power system Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: P63 Word Count Estimation: 91,999 Date of Issue: 2017-01-21 Date of Implementation: 2017-07-01 Older Standard (superseded by this standard): GB/T 50063-2008 Regulation (derived from): Ministry of Housing and Urban - Rural Development Notice No. 1435 of 2017 Issuing agency(ies):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 GB/T 50063-2017: Code for design of electrical measuring device of power system---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 standardize the design of electrical measuring instruments for power installations, to achieve accuracy and reliability, advanced technology, convenient monitoring, convenient operation and management, economical and reasonable, and unify design principles, this specification is formulated. 1.0.2 This code is applicable to newly built or expanded steam turbine generators and gas turbine power plants with a unit capacity of 1000MW and below, hydropower plants with a unit capacity of.200kW and above, including pumped storage power plants, conventional islands of nuclear power plants, Design of transformer (distribution) substations with AC rated voltage of 10kV and above, including series compensation stations, DC converter stations with DC rated voltage of ±800kV and below, and grid-connected wind power and photovoltaic power stations.. 1.0.3 The design of electrical measuring instruments for power installations shall not only comply with this specification, but also comply with the current relevant national standards. 2 Terms and symbols 2.1 Terminology 2.1.1 Electrical measuring The measurement of electrical real-time parameters by means of electricity. 2.1.2 energy metering Measurement of electrical energy parameters. 2.1.3 general electrical measuring meter Refers to the instrument used for frequent measurement, selective measurement and recording of the electrical operating parameters of the power device circuit. 2.1.4 pointer-type meter An instrument that indicates the measured value according to the relationship between the pointer and the scale. 2.1.5 digital instrument digital-type meter An instrument that directly displays the measured value with numbers on the display. 2.1.6 multifunction power meter An intelligent instrument with multiple functions such as programmable measurement, display, digital communication and power pulse transmission output. 2.1.7 energy meter An instrument for measuring active (reactive) energy data. 2.1.8 induction energy meter An electric energy meter that operates by inductively sensing the rotation of a disc of the measuring element. 2.1.9 electronic energy meter Through the real-time sampling of voltage and current, the dedicated energy meter integrated circuit is used to process the sampled voltage and current signals, and the energy meter displayed by the counter or digital display. 2.1.10 multifunction energy meter It is composed of a measuring unit and a data processing unit. In addition to measuring one-way or two-way active (reactive) energy, it also has two or more functions such as time-sharing and direction-sharing demand, and can display, store and output data.. 2.1.11 voltage loss timer voltage loss time counter It is a special instrument for accumulating and displaying the voltage loss time of the voltage circuit of the electric energy meter. 2.1.12 energy tariff point Refers to the metering point for electric energy settlement between power generation enterprises and power grid operating enterprises. 2.1.13 Electrical measuring transducers A device that converts a measurand into a DC current, DC voltage, or digital signal. 2.1.14 transmitter calibration value calibration value for transducers According to the user's needs, the value of a certain amount is obtained by changing the nominal value of the transmitter through adjustment. 2.1.15 Measuring instrument accuracy class measuring instrument accuracy class Class of measuring instruments and/or accessories that meet certain metrological requirements designed to keep permissible errors and variations within specified limits. 2.1.16 Measuring instrument intrinsic error Refers to the error of the instrument and (or) accessories under the reference conditions. 2.1.17 total measuring error Refers to the combined error caused by measuring instruments, transformers and their secondary circuits. 2.1.18 Energy tariff equipment A device for measuring electric energy parameters at electric energy gateway metering points. Including various types of electric energy meters, measuring voltage and current transformers and their secondary circuits, electric energy metering cabinets (boxes), etc. 2.1.19 energy tariff meter Refers to the electric energy meter equipped with the electric energy metering device at the gateway. 2.2 Symbols R - resistance; X - reactance; Z—impedance; I - current; U - voltage; P - active power; Q - reactive power; S - apparent power; W——Active electric energy; WQ——reactive energy; PF - power factor; f - frequency. 3 Electrical measuring devices3.1 General provisions 3 The high voltage side of the generator excitation transformer; 4 Factory (station) transformer. one side of double-winding transformer and each branch circuit, three sides of three-winding transformer; 5 High-voltage plant (station) power supply. high-voltage bus working and standby power supply incoming lines, high-voltage bus contact circuit breaker, high-voltage plant feeder; 6 Low-voltage factory (station) power supply. PC power supply incoming line, PC contact circuit breaker, PC to MCC feeder circuit, diesel generator to security section incoming line and AC uninterruptible power supply distribution panel incoming line circuit; 7 Lines of 1200V and above and trunk lines of power supply, distribution and consumption networks below 1200V; 8 The electrical main wiring is each circuit breaker circuit of 3/2 wiring, 4/3 wiring and corner wiring; 9 Bus tie circuit breaker, bus section circuit breaker, bypass circuit breaker and bridge circuit breaker circuits; 10 330kV and above voltage level shunt reactor and its neutral point grounding small reactance circuit; 10kV ~ 110kV shunt capacitor and shunt reactor general circuit and group circuit; 11 arc suppression coil circuit; 12 3kV～10kV motors, 55kW and above motors, O and I class motors below 55kW, and other motors whose process requires current monitoring; 13 Wind turbine current, wind turbine transformer high and low voltage sides. 3.2.2 In addition to complying with the provisions of Article 3.2.1 of this specification, the following circuits shall also measure three-phase AC current. 1 Stator circuit of synchronous generator and generator/motor; 2 110kV and above voltage level transmission lines, transformers, circuit breakers with 3/2 wiring, 4/3 wiring and corner wiring, bus tie circuit breakers, bus section circuit breakers, bypass circuit breakers and bridges circuit breaker circuit; 3 330kV and above voltage level shunt reactor; 10kV ~ 110kV shunt capacitor and shunt reactor total circuit and group circuit; 4 Lighting transformers, transformers shared by lighting and power, maintenance transformers, lines below 3kV where lighting loads account for 15% or more of power and lighting mixed power supply; 5 Power user lines of 1200V and above with three-phase load asymmetry greater than 10%, power supply lines below 1200V with three-phase load asymmetry greater than 15%. 3.2.3 The negative sequence current should be measured in the following circuits, and the accuracy of the negative sequence current measuring instrument should not be lower than 1.0 level. 1 Large-capacity turbogenerators with negative sequence current overload capacity A value less than 10; 2 Generators whose load asymmetry exceeds 10% of the rated current; 3 1200V and above lines whose load asymmetry exceeds 0.1 times the rated current. 3.2.4 The following circuits should measure DC current. 1 Excitation circuits of synchronous generators, generators/motors and synchronous motors, output circuits for automatic and manual adjustment of excitation; 2 DC generator and its excitation circuit, DC motor and its excitation circuit; 3 The output circuit of the battery pack, the output circuit of the charging and floating charging rectification device; 4 DC output circuit of important power rectification device; 5 The photovoltaic power generation battery string circuit and the output circuit of each combiner box. 3.2.5 The current measurement of the rectifier should include harmonic monitoring. 3.3 Voltage measurement and insulation monitoring 3.3.1 The following circuits should measure AC voltage. 1 Stator circuit of synchronous generator and generator/motor; 2 AC main busbars of various voltage levels; 3 Power system tie line (line side); 4 Other circuits where voltage measurement is required. 3.3.2 The voltage quality monitoring point of the power system and the generator voltage busbar shall measure and record the AC voltage. 3.3.3 Three line voltages should be measured for the voltage of the neutral point effective grounding system. For the main busbar and transformer circuit with only single-phase voltage transformer wiring or VV wiring, only single-phase voltage or one line voltage can be measured. Voltage; neutral point voltage measurement for non-effectively earthed systems to measure one line voltage and three phase voltages to monitor insulation. 3.3.4 The following circuits should monitor the insulation of the AC system. 1 Stator circuit of synchronous generator and generator/motor; 2 Busbars and circuits of neutral point non-effectively grounded systems. 3.3.5 Insulation monitoring method, for the busbar and circuit of the neutral point non-effectively grounded system, it is advisable to measure a line voltage of the busbar and monitor the three phase voltages of the insulation; for the stator circuit of synchronous generator and generator/motor, it can The method of measuring the zero-sequence voltage of the auxiliary secondary winding of the generator voltage transformer can also be used to measure the three-phase voltage of the generator. 3.3.6 The following circuits should measure DC voltage. 1 The excitation circuit of the synchronous generator and generator/motor, and the corresponding automatic and manual adjustment of the excitation output circuit; 2 Excitation circuit of synchronous motor; 3 DC generator circuit; 4 The main busbar of the DC system, the DC output circuit of the battery pack, charging and floating charging rectifier; 5 The output circuit of the important power rectification device; 6 The bus bar of each combiner box of photovoltaic power generation. 3.3.7 The following circuits should monitor the insulation of the DC system. 1 Excitation circuit of synchronous generator and generator/motor; 2 Excitation circuit of synchronous motor; 3 The main busbar and feeder circuit of the DC system; 4 The output circuit of the important power rectification device. 3.3.8 The DC system should be equipped with an insulation monitoring device that directly measures the insulation resistance value, and its measurement accuracy should not be lower than 1.5.The insulation monitoring device should not use the AC injection method to measure the insulation status of the DC system, but should use the DC system insulation monitoring device based on the DC principle. 3.4 Power measurement 3.4.1 Active power should be measured for the following circuits. 1 Stator circuit of synchronous generator and generator/motor; 2 Main transformer. one side of the double-winding main transformer, three sides of the three-winding main transformer, and three sides of the autotransformer; 3 High voltage side of generator excitation transformer; 4 Factory (station) transformers. the high-voltage side of the double-winding transformer, and the three sides of the three-winding transformer; 5 6kV and above transmission and distribution lines and power lines; 6 Bypass circuit breaker, bus tie (or section) and bypass circuit breaker circuit and outer bridge circuit breaker circuit. 3.4.2 The power of the generator is to be measured on the machine-side control panel of the synchronous generator and generator/motor. 3.4.3 Bi-directional active power shall be measured for transmission and distribution lines, hydro-generators, power generators/motors, and main transformers operating in two-way transmission and reception. 3.4.4 The reactive power should be measured for the following circuits. 1 Stator circuit of synchronous generator and generator/motor; 2 Main transformer. one side of the double-winding main transformer, three sides of the three-winding main transformer, and three sides of the autotransformer; 3 6kV and above transmission and distribution lines and power lines; 4 bypass circuit breaker, bus tie (or section) and bypass circuit breaker circuit and outer bridge circuit breaker circuit; 5 330kV and above high voltage shunt reactor; 6 10kV～110kV shunt capacitor and shunt reactor group. 3.4.5 The following circuits shall measure reactive power in both directions. 1 Synchronous generators, generators/motors with phase-advance and lag-phase operation requirements; 2.At the same time, it is connected to the general circuit of 10kV ~ 110kV shunt capacitor and shunt reactor group; 3 10kV and above power lines. 3.4.6 The power factor should be measured for the following circuits. 1 Generator, generator/motor stator circuit; 2 Grid power factor assessment point. 3.5 Frequency measurement 3.5.1 The frequency measurement range should be 45Hz ~ 55Hz, and the accuracy should not be lower than 0.2 grade. 3.5.2 Frequency should be measured for the following circuits. 1 The busbars of each section connected with the generator transformer set; 2 generators; 3.The busbars of each section of the power grid that may be decoupled; 4 AC uninterruptible power supply distribution panel busbar. 3.5.3 The side-machine control panel of synchronous generator and generator/motor is to measure the frequency of the generator. 3.6 Monitoring of public grid harmonics 3.6.1 Continuous monitoring or special monitoring can be adopted for the monitoring of public grid harmonics. 3.6.2 At the harmonic monitoring point, electrical measuring devices with harmonic voltage and harmonic current measurement functions should be installed. Harmonic monitoring points should be arranged in combination with the distribution of harmonic sources, and should cover the main network and all power supply voltage levels. 3.6.3 The accuracy of the current transformer and voltage transformer used for harmonic measurement should not be lower than 0.5. 3.6.4 The number of harmonic measurements should not be less than 2 to 19 times. 3.6.5 The measurement of harmonic current and voltage should adopt digital instruments, and the accuracy of the measuring instruments should adopt Class A. 3.6.6 Harmonic monitoring points should be set up for the following circuits of the public power grid. 1 System designated harmonic monitoring point (bus); 2.The transmission end of the line that supplies power to users of harmonic sources; 3 When two or more harmonic source users from different departments are connected to one power supply line, the power receiving end of the harmonic source user; 4 Circuits required by special users; 5 Other circuits that need to be monitored. 3.7 Public electrical measurement of power plants and substations 3.7.1 Thermal power plants with a total installed capacity of 300MW and above, as well as thermal power plants with frequency regulation or peak regulation, should monitor and record the following electrical parameters. 1 The main control room, network control room and unit control room shall monitor the frequency of the main grid and the voltage of the main busbar; 2 For frequency regulation or peak regulation power plants, when the main control mode is adopted, the frequency of the main grid should be monitored on the thermal control panel; 3 The main control room and network control room should monitor and record the total active power of the whole plant. The total active power of the whole plant should be monitored on the thermal control panel controlled by the main control room; 4 The main control room and network control room should monitor the power consumption rate of the whole plant. 3.7.2 For hydroelectric power plants with a total installed capacity of 50MW and above, as well as frequency-regulated or peak-regulated hydropower plants, the central control room shall monitor and record the following electrical parameters. 1 Frequency and voltage of the main bus; 2 Total active power and reactive power of the whole plant. 3.7.3 The main control room of the substation should monitor the frequency and voltage of the main bus. 3.7.4 The main control room of wind power station and photovoltaic power station shall monitor and record the following electrical parameters. 1 Frequency and voltage of the main bus; 2 Total active power and reactive power of the whole plant. 3.7.5 When common electrical measuring instruments are used, digital instruments should be used for public electrical measuring instruments in power plants and substations. 3.8 Measurement of static compensation and series compensation devices 3.8.1 The static var compensation device should measure the following parameters. 1 One reference voltage; 2 The busbar voltage connected to the static var compensation device; 3 The three-phase current and reactive power of the parallel capacitor and reactor group circuit; 4 Three-phase current and reactive power of thyristor controlled reactor and thyristor switching capacitor group circuit; 5 The three-phase current and reactive power of the group circuit of the harmonic filter group; 6 Three-phase current, reactive power and reactive energy of the total circuit. When parallel capacitors and reactors are connected under the general circuit at the same time, the reactive power in both directions should be measured and the reactive energy of phase-advance and lag-phase operation should be measured separately. 3.8.2 The static synchronous compensation device should measure the following parameters. 1 One reference voltage; 2 The bus voltage connected to the static synchronous compensation device; 3 Single-phase current of each phase unit of static synchronous compensation device; 4 The three-phase current, reactive power and reactive energy of the general circuit of the static synchronous compensation device. 3.8.3 The fixed series compensation device should measure the following parameters. 1 series compensation line current; 2 capacitor current; 3 capacitor unbalanced current; 4 metal oxide arrester current; 5 Temperature of metal oxide arrester; 6 bypass circuit breaker current; 7 Series compensated reactive power. 3.8.4 The controllable series compensation device should measure the following parameters. 1 series compensation line current; 2 series compensated line voltage; 3 capacitor voltage; 4 capacitor unbalanced current; 5 metal oxide arrester current; 6 Temperature of metal oxide arrester; 7 bypass circuit breaker current; 8 thyristor valve current; 9 firing angle; 10 Equivalent capacitive reactance; 11 degree of compensation; 12 Series compensated reactive power. 3.9 Electrical measurements of the DC converter station 3.9.1 The electrical measurement data of the DC part of the DC converter station should be collected by pole, and the parameters of the bipolar poles can be calculated by the computer monitoring system. 3.9.2 The integrated error of the entire DC current measuring device should be ±0.5%, and the integrated error of the DC voltage measuring device should be ±1.0%. 3.9.3 For bidirectional current and power loops and polarized DC voltage loops, the collected data should have direction or polarity. 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