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Delivery: <= 5 days. True-PDF full-copy in English will be manually translated and delivered via email. DL/T 1981.1-2019: Unified power flow controller -- Part 1: function specifications Status: Valid
Basic dataStandard ID: DL/T 1981.1-2019 (DL/T1981.1-2019)Description (Translated English): Unified power flow controller -- Part 1: function specifications Sector / Industry: Electricity & Power Industry Standard (Recommended) Classification of Chinese Standard: F20 Word Count Estimation: 25,225 Date of Issue: 2019-06-04 Date of Implementation: 2019-10-01 Quoted Standard: GB/T 311.1; GB/T 1094.1-2013; GB/T 1094.5; GB/T 3222.2; GB/T 4824; GB/T 12325; GB/T 12326; GB/T 13498; GB/T 14549; GB/T 15543; GB/T 20989; GB/T 22390.1; GB/T 24337; GB/T 6216.1; GB/T 26217; GB/T 30425; GB/T 30553-2014; GB/T 35702.1; GB/T 35702.2; DL/T 272 Regulation (derived from): Natural Resources Department Announcement No. 7 of 2019 Issuing agency(ies): National Energy Administration Summary: This standard specifies the requirements of the unified power flow controller (UPFC) system composition, functions, complete system performance, coordination of components and subsystems, and test verification. This section applies to the UPFC used in the 220kV and above voltage level power grid, and the UPFC of other voltage levels can be implemented by reference. DL/T 1981.1-2019: Unified power flow controller -- Part 1: function specifications---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.Unified power flow controller-Part 1.function specifications ICS 27.140 F 20 People's Republic of China Electric Power Industry Standard Unified power flow controller Part 1.Functional Specification 2019-06-04 released 2019-10-01 implementation Issued by National Energy Administration Table of contentsForeword...II 1 Scope...1 2 Normative references...1 3 Terms and definitions...2 4 UPFC composition...6 5 Functional requirements...8 6 Complete system performance requirements...11 7 Coordination requirements for components and subsystems...15 8 Test verification requirements...19 Appendix A (informative appendix) UPFC operation mode...22ForewordThen drafted. As the grid load level continues to increase, in order to solve the problem of flexible power flow control, the unified power flow controller (UPFC) will be installed in the power grid. --Part 1.Functional Specification --Part 2.System Design Guidelines --Part 3.Technical specifications for control and protection systems --Part 4.Inverter technical specifications --Part 5.Technical specifications for series transformers --Part 6.Technical specification of bypass device --Part 7.Technical specifications for measuring devices --Part 8.Code for construction and acceptance of electrical installations --Part 9.Handover Test Procedure --Part 10.System Test Procedure --Part 11.Dispatch operation procedures --Part 12.Equipment maintenance test procedures Supplements or extensions. Please note that certain contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents. Appendix A of this standard is an informative appendix. This part was proposed by the China Electricity Council. This part is under the jurisdiction of the Power Quality and Flexible Transmission Standardization Technical Committee (DL/T C 40) of the power industry. Drafting organizations of this section. State Grid Jiangsu Electric Power Co., Ltd. Electric Power Research Institute, Nanjing Nanrui Relay Electric Co., Ltd., Global Energy Source Internet Research Institute Co., Ltd., China Electric Power Research Institute Co., Ltd., State Grid Jiangsu Electric Power Co., Ltd. Economic and Technical Research Institute, CLP Purui Technology Co., Ltd., State Grid Jiangsu Electric Power Co., Ltd. Nanjing Power Supply Branch, State Grid Hai Power Co., Ltd. Electric Power Research Institute Research Institute, State Grid Shandong Electric Power Co., Ltd. Electric Power Research Institute, State Grid Hubei Electric Power Co., Ltd. Electric Power Research Institute, State Grid Gansu Provincial Electric Power Co., Ltd. Electric Power Research Institute, Hangzhou Baimeng Intelligent Switch Co., Ltd., Beijing Sifang Relay Automation Co., Ltd. The main drafters of this section. Li Qun, Liu Jiankun, Li Peng, Pan Lei, Shen Xuhui, Qiao Guangyao, Xie Zhenjian, Lu Zhengang, Bao Wei, Han Ya Nan, Sun Shumin, Wang Xuan, Yang Guang, Cai Defu, Hu Qunrong, Zhiyong, Liu Shu. The opinions or suggestions in the implementation of this part are fed back to the Standardization Management Center of China Electricity Council (Baiguang, Xuanwu District, Beijing) Lu Er Tiao No. 1, 100761). Unified power flow controller Part 1.Functional Specification1 ScopeThis part specifies the system composition, functions, complete system performance, coordination of components and subsystems of the unified power flow controller (UPFC), Test verification and other requirements. This section applies to the UPFC used in the 220kV and above voltage level power grid, and the UPFC of other voltage levels can be implemented by reference.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GB 311.1 Insulation coordination Part 1.Definitions, principles and rules GB 1094.1-2013 Power Transformer Part 1.General Rules GB 1094.5 Power Transformer Part 5.Ability to withstand short circuit GB/T 3222.2 Acoustics. Description, measurement and evaluation of environmental noise. Part 2.Determination of environmental noise level GB/T 4824 Industrial, scientific and medical (ISM) radio frequency equipment electromagnetic disturbance characteristic limit and measurement method GB/T 12325 Power quality supply voltage deviation GB/T 12326 Power quality voltage fluctuation and flicker GB/T 13498 Terminology for HVDC Transmission GB/T 14549 Power quality public grid harmonics GB/T 15543 Power quality three-phase voltage unbalance Determination of losses in GB/T 20989 HVDC converter station GB/T 22390.1 High voltage direct current transmission system control and protection equipment Part 1.Operator control system GB/T 24337 Power Quality Interharmonics in Public Grid GB/T 26216.1 DC current measuring device for high voltage direct current transmission system Part 1.Electronic DC transformer GB/T 26217 DC voltage measuring device for high voltage DC transmission system GB/T 30425 High voltage direct current transmission converter valve water cooling equipment GB/T 30553-2014 HVDC transmission based on voltage source converter GB/T 35702.1 Voltage source converter valve loss for high voltage direct current system Part 1.General requirements GB/T 35702.2 Voltage source converter valve loss for high voltage direct current system Part 2.Modular multilevel converter GB 50062 Design specification for relay protection and automatic device of power installation GB 50064 Design Code for Overvoltage Protection and Insulation Coordination of AC Electrical Equipment GB 50150 Electrical equipment installation engineering electrical equipment handover test standard DL/T 272 220kV～750kV oil-immersed power transformer technical conditions DL/T 837 Reliability Evaluation Regulations for Transmission and Distribution Facilities DL/T 995 Inspection Regulations for Relay Protection and Power Grid Security Automatic Devices DL/T 1129 DC converter station secondary electrical equipment handover test procedures DL/T 1193-2012 Flexible transmission terms3 Terms and definitionsThe following terms and definitions defined in GB/T 13498 and GB/T 30553-2014 apply to this document. 3.1 Unified power flow controller UPFC Connect two (or more) voltage source converters sharing the DC bus into the power transmission system in parallel and in series, and adjust A device that saves the equivalent impedance, voltage amplitude and phase angle of the line to realize power flow control. 3.2 Static synchronous compensator STATCOM A kind of voltage source converter which is connected in parallel to the system. Its output capacitive or inductive reactive current is continuously adjustable and can be used in the system. Reactive power compensation device in the voltage range that has nothing to do with the system voltage. [DL/T 1193-2012, definition 4.1.2] 3.3 Static synchronous series compensator SSSC A device that connects a voltage source converter in series with a transmission line to continuously and quickly control the equivalent impedance of the line. [DL/T 1193-2012, definition 4.1.5] 3.4 Converter An electrical device capable of realizing a complete commutation function. [DL/T 1193-2012, definition 3.3.4] 3.5 Voltage source converter VSC The commutation function is realized by a switchable device, and the DC side energy storage element is a capacitor converter. [DL/T 1193-2012, definition 3.3.8] 3.6 Modular multilevel converter MMC Each VSC valve is a multi-level converter composed of a certain number of independent single-phase voltage source converters in series. [GB/T 30553-2014, definition 3.4.7] 3.7 Converter arm A part of the converter circuit, connected between the AC and DC terminals, has unidirectional or bidirectional conductivity. [DL/T 1193-2012, definition 3.3.5] 3.8 Power unit It is a basic functional unit packaged by a combination of power and electronic devices and corresponding diodes, auxiliary equipment, control circuits, etc. according to a certain function. 3.9 Modular multilevel converter type unified power flow controller MMC based UPFC MMC-UPFC A unified power flow controller with modular multilevel converters. 3.10 Connection transformer (interface transformer) A transformer that is connected between the voltage source converter and the AC power grid and transmits electrical energy between the voltage source converter and the AC power grid. In UPFC , Including parallel transformers and series transformers. 3.11 Shunt transformer A transformer with two or more windings connected in parallel to the AC grid for operation. 3.12 Series transformer A transformer with a series winding connected in series with the line to change the line voltage value and (or) phase and an excitation winding. [GB 1094.1-2013, definition 3.1.3] Note. When applied in UPFC, the grid side winding of the series transformer is a series winding, and the valve side winding is an excitation winding. 3.13 Valve side winding Winding directly connected to the inverter. 3.14 Grid side winding Winding directly connected to the grid. [DL/T 1193-2012, definition 4.5.8] 3.15 Balance winding (stable winding) In star-star connection and star-zigzag connection transformer, the auxiliary winding of delta connection used to reduce zero sequence impedance. [GB 1094.1-2013, definition 3.3.8] Note. When applied in UPFC, the valve side winding of the series transformer adopts star connection, and balance winding is required. 3.16 Start circuit It is connected in series between the AC system and the voltage source converter, and is used to suppress the transient current loop during the charging process of the converter. It is generally composed of resistance and It is composed of a bypass device, which bypasses the resistor after the converter charging process is over. 3.17 Thyristor bypass switch TBS A power electronic switch composed of forward and reverse parallel thyristors, current-limiting reactors and auxiliary equipment. It is connected in parallel with the protected equipment to Bypass the protected equipment, which has the ability to quickly trigger conduction and withstand the fault current of the protected equipment for a short time. 3.18 Mechanical bypass switch (bypass circuit breaker) A special switch that requires fast closing capability, used to bypass series-type compensation equipment, is a line series-type compensation equipment input The main operating equipment for entering and exiting operation. 3.19 Fast bypass system A bypass system composed of TBS and a mechanical bypass switch. After the bypass (trigger) command is issued, the TBS quickly triggers the bypass to be turned on. To protect the equipment, the TBS will bear the current flowing through the protected equipment for a short time, and then the mechanical bypass switch will be closed and continue to bear the electricity of the protected equipment. Flow, TBS stops triggering and the current zero-crossing shuts off. 3.20 Converter valve reactor Connected to the converter valve, it is used to suppress the output harmonic current of the converter valve, and limit the reactor of transient and fault current. 3.21 Multi-terminal UPFC It is connected back to back on the DC side of three sets of voltage source converters or more, and is used to adjust the UPFC of double-circuit or multi-circuit line power. 3.22 Single-circuit UPFC single-circuit UPFC UPFC installed on a single circuit line. 3.23 Multi-circuit UPFC multi-circuit UPFC The UPFC installed on the double-circuit or multi-circuit line can be composed of multi-terminal UPFC or multiple single-circuit line UPFC. 3.24 UPFC operation mode Both the series side and the parallel side of UPFC are connected to the system for operation, and the parallel converter is connected to the DC side of the series converter. Control the reactive power or voltage of the access point on the parallel side and the power of the line on the series side at the time, see Appendix A Figure A.1. 3.25 STATCOM operation mode The parallel side of UPFC is separately connected to the system for operation, the series side is bypassed, and the parallel converter is isolated from the DC side of the series converter. It can be used to control the reactive power or voltage on the parallel side, see Appendix A Figure A.2. 3.26 SSSC operation mode The UPFC series side is separately connected to the system for operation, and the series converter is isolated from the parallel converter on the DC side, which can be used for control For active power of the line, see Appendix A Figure A.3. 3.27 Power flow following control The series converter controls to generate a fixed valve-side voltage or injected line voltage, and the line power will fluctuate with the change of the grid operation status. At this time, the series side of UPFC is in line flow following state. 3.28 Fault ride-through In the event of a grid failure, it will continue to operate without leaving the grid and support the grid until the failure is restored. 3.29 Dynamic response index System dynamic response indicators include. response time, settling time, overshoot, as shown in Figure 1. Figure 1 Schematic diagram of dynamic response indicators 3.29.1 Response time When the step control signal is input, the time it takes for the output electrical quantity to reach 90% of the target value from 0 to the target value without overshoot during the period. [DL/T 1193-2012, definition 3.5.14] 3.29.2 Settling time When the step control signal is input, the time it takes for the output electrical quantity to reach ±5% of the target value. [DL/T 1193-2012, definition 3.5.15] 3.29.3 Overshoot When the step control signal is input, the output electrical quantity exceeds the ratio of the maximum overshoot (maximum offset) to the step quantity that exceeds the steady-state value. 3.30 UPFC losses UPFC losses mainly include. converter losses, connecting transformer losses, and auxiliary system losses such as water pumps, fans, and heating. 3.31 Converter losses The converter loss is composed of converter valve loss and valve reactor loss. Among them, the converter valve loss mainly includes. power unit conduction loss and Switching loss, power unit DC capacitor, voltage divider and damping circuit, gate drive unit and other equipment losses.4 UPFC composition4.1 UPFC typical structure and main equipment 4.1.1 Typical structure of UPFC The typical structure of UPFC is shown in Figure 2.It is mainly composed of series side, parallel side and control and protection system. Among them. a) The series side mainly includes. series converter (including valve reactor), series transformer and fast bypass system; b) The parallel side mainly includes. parallel converter (including valve reactor), parallel transformer and starting circuit.5 Functional requirements5.1 Operation mode 5.1.1 UPFC operation mode Refer to Figure A.1 in Appendix A for the wiring diagram of UPFC operating mode. This operating mode should meet the following requirements. a) Set the line active power, reactive power reference value and ramp rate, and automatically control the output voltage of the series converter to make the line The circuit power runs at the reference value; b) Set the UPFC parallel side access system voltage or the reference value of the reactive power injection system and the rise and fall rate, through automatic control of parallel switching The injection current of the inverter makes the voltage of the access point on the parallel side of the UPFC meet the voltage control requirements, or the injected reactive power meets the reactive power control System requirements c) The series side power control and the parallel side voltage or constant reactive power control should be coordinated and considered to meet the safety requirements of the power grid and UPFC equipment. Rely on operating requirements; d) When the multi-circuit UPFC is running, the active and reactive power of the multi-circuit line should be coordinated and controlled to avoid uneven distribution of line power flow. 5.1.2 STATCOM operation mode UPFC should have a separate STATCOM operation mode. Please refer to Figure A.2 in Appendix A for the wiring diagram of STATCOM operation mode. The following requirements shall be met in operation mode. a) Set the UPFC parallel side access system voltage or the reference value of the reactive power injection system and the rise and fall rate, through automatic control of parallel switching The injection current of the inverter makes the voltage of the access point on the parallel side of the UPFC meet the voltage control requirements, or the injected reactive power meets the reactive power control System requirements b) When multiple inverters are operating in STATCOM mode, they shall have the function of coordinated control between the inverters. 5.1.3 SSSC operation mode UPFC can have a separate SSSC operation mode. For the wiring diagram of SSSC operation mode, refer to Figure A.3 in Appendix A. In this operation mode The following requirements should be met. a) Set the reference value of the line active power and the rise and fall rate, and automatically control the output voltage of the series converter to make the line active power Run at reference value; b) When multiple converters are operating in SSSC operation mode, they should have the function of coordinated control between converters to avoid multi-circuit power flow Uneven distribution. 5.2 Basic control functions 5.2.1 Line flow control 5.2.1.1 Line active power control In UPFC or SSSC operation mode, the active power of the control circuit reaches the set reference value. 5.2.1.2 Line reactive power control In UPFC operation mode, the reactive power of the control circuit reaches the set reference value. 5.2.1.3 Line power factor control In UPFC operation mode, the active power and power factor of the control circuit reach the set reference value. 5.2.1.4 Power flow following control on series side UPFC should be equipped with the series side flow following control function; when the series side is in the flow following control mode, if the system needs emergency power Control, the UPFC series side should execute emergency power control logic. After the system returns to normal, the series side returns to the power flow following control state. 5.2.2 Reactive voltage control on parallel side 5.2.2.1 AC voltage control In UPFC or STATCOM operation mode, the voltage of the access point on the parallel side of the UPFC is controlled to reach the set reference value. 5.2.2.2 Reactive power control In UPFC or STATCOM operation mode, control the reactive power injected into the system on the parallel side of UPFC to reach the set reference value. 5.2.3 UPFC start-stop control UPFC start-stop control function requirements are as follows. a) The startup and shutdown process of UPFC should deal with no disturbance to the AC system and no impact on UPFC equipment; b) When starting UPFC, the parallel side and series side should be started separately, and the parallel side should be started first, and then the series side should be started; c) When UPF......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of DL/T 1981.1-2019_English be delivered?Answer: Upon your order, we will start to translate DL/T 1981.1-2019_English as soon as possible, and keep you informed of the progress. 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