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DL/T 2010-2019 English PDF

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DL/T 2010-2019: (High voltage reactive power compensation device relay protection configuration and tuning technical specifications)
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Basic data

Standard ID: DL/T 2010-2019 (DL/T2010-2019)
Description (Translated English): (High voltage reactive power compensation device relay protection configuration and tuning technical specifications)
Sector / Industry: Electricity & Power Industry Standard (Recommended)
Classification of Chinese Standard: K45
Word Count Estimation: 16,112
Date of Issue: 2019-06-04
Date of Implementation: 2019-10-01
Regulation (derived from): Natural Resources Department Announcement No. 7 of 2019
Issuing agency(ies): National Energy Administration

DL/T 2010-2019: (High voltage reactive power compensation device relay protection configuration and tuning technical 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.
Technical specification for protection configuration and setting of high-voltage var compensator ICS 29.240 K 45 Record number. 63143-2018 People's Republic of China Electric Power Industry Standard Configuration and setting of relay protection for high voltage reactive power compensation device specifications 2019-06-04 released 2019-10-01 implementation Issued by National Energy Administration

Preface... II 1 Scope...1 2 Normative Reference Documents...1 3 Terms, definitions and abbreviations...1 4 General Provisions...2 5 Principles of SVC Relay Protection Configuration...3 6 SVC Relay Protection Setting Principles...4 7 Principles of STATCOM Relay Protection Configuration...5 8 STATCOM Relay Protection Setting Principles...6 9 Principles of relay protection configuration for connecting transformers...7 10 Setting principles for relay protection of connected transformers...7 Appendix A (informative appendix) Basic principles of high-voltage static var compensation device and static synchronous compensation device...9

Foreword

This standard is formulated in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the China Electricity Council. This standard is under the jurisdiction of the Power Industry Relay Protection Standardization Technical Committee. Drafting organizations of this standard. Northwest Branch of State Grid Corporation, State Grid Gansu Electric Power Co., Ltd., Guangdong Power Grid Co., Ltd., Guangzhou Power Supply Bureau Co., Ltd., Xi’an Jiaotong University, Guangdong Power Grid Corporation Dongguan Power Supply Bureau, China Power Construction Group Northwest Survey, Design and Research Institute Co., Ltd. Company, State Grid Shaanxi Electric Power Company Maintenance Company, China Electric Power Research Institute Co., Ltd., Nanjing Nanrui Relay Electric Co., Ltd., China Power Preh Technology Co., Ltd., Beijing Sifang Relay Automation Co., Ltd., State Grid Zhejiang Electric Power Research Institute. The main drafters of this standard. Zhang Jiankang, Su Xiaohua, Zhao Yi, Hu Yong, Deng Xuyang, Gao Qiang, Jiao Zaibin, Wang Jianhua, Xi Yu, Li Ke, Zhan Rongrong, Wu Xiaodan, Li Tao, Liu Shu, Ke Renguan. The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of China Electricity Council (No. 2 Baiguang Road, Beijing) One, 100761). Technical specification for relay protection configuration and setting of high voltage reactive power compensation device

1 Scope

This standard specifies the high-voltage static var compensation device (hereinafter referred to as "SVC") and the static synchronous compensation device (hereinafter referred to as "STATCOM") Technical principles of relay protection configuration and setting. This standard is applicable to SVC and STATCOM connected to 35kV and above power transmission system and distribution system, other voltage levels Can refer to implementation. In this standard, SVC takes the thyristor control reactor type as an example, and STATCOM takes the chain type as an example. Other structure types can be implemented by reference. Each high-voltage reactive power compensation device project has its particularity. This standard should be used according to the specific project conditions and requirements, and the corresponding Should be added.

2 Normative references

The 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/T 2900.1 Basic terminology for electrical engineering GB/T 2900.17 Electrical terminology measuring relay GB/T 2900.49 Electrician Terminology Power System Protection GB/T 14285 Technical Regulations for Relay Protection and Safety Automatic Equipment GB/T 20298 Static Var Compensation Device (SVC) Functional Characteristics DL/T 478 General technical requirements for relay protection and safety automatic devices DL/T 770 General technical conditions for transformer protection devices DL/T 1010.1-2006 High-voltage static reactive power compensation device Part 1 System design DL/T 1010.3 High-voltage static reactive power compensation device Part 3 Control system DL/T 1193-2012 Flexible transmission terms DL/T 1215.3 Chained static synchronous compensator Part 3.Control, protection and monitoring system NB/T 42043-2014 high voltage static synchronous compensation device 3 Terms, definitions and abbreviations 3.1 Terms and definitions The following terms and definitions defined in GB/T 2900.1, GB/T 2900.17, and GB/T 2900.49 apply to this document. 3.1.1 Static var compensator A parallel controllable reactive power compensation device composed of static components adjusts the output by changing its capacitive or (and) inductive equivalent impedance, To maintain or control the specific parameters of the power system (typical parameters are voltage, reactive power). [DL/T 1010.1-2006, definition 3.1] 3.1.2 Static synchronous compensator Static var generator 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. Static synchronous compensation device is also called static reactive power generator. [DL/T 1193-2012, definition 4.1.2, with modification] 3.1.3 Thyristor controlled reactor The shunt reactor controlled by the thyristor continuously changes its equivalent inductance by controlling the conduction angle of the thyristor valve. [DL/T 1010.1-2006, definition 3.1] 3.1.4 Chain static synchronous compensation device A kind of multi-level static synchronous compensation device whose converter adopts chain type (H bridge cascade) voltage source converter. [DL/T 1193-2012 definition 4.3.3] 3.1.5 Interface reactor A reactor connected to the converter and AC system to realize the power exchange between the converter and the grid. [NB/T 42043-2014 definition 3.9] 3.1.6 Interface transformer It is a transformer connected with SVC/STATCOM and AC system to realize power exchange between SVC/STATCOM and grid. 3.1.7 Filter/fixed capacitor A parallel device formed by a proper combination of capacitors and reactors (and sometimes resistors) has the functions of reactive power compensation, filtering and voltage regulation. [DL/T 1010.1-2006, definition 3.5] 3.1.8 High and low voltage ride through of var compensator When an external fault or disturbance causes the voltage of the reactive power compensation device to increase or decrease, within the specified voltage fluctuation range and time In the compartment, the reactive power compensation device can ensure continuous operation without disconnecting from the grid. 3.2 Abbreviations CT. current transformer PT. Voltage transformer SVC. Static var compensation device STATCOM. Static synchronous compensation device TCR. Thyristor Controlled Reactor FC. filter capacitor (

4 General

4.1 See Appendix A for the basic principles of SVC and STATCOM in this standard. 4.2 The configuration and setting of SVC and STATCOM relay protection should be coordinated with grid operation requirements. 4.3 In the planning and design stage, coordination of the selection of primary and secondary equipment should be done, and the adaptability of relay protection should be fully considered to avoid special wiring. This method increases the difficulty of relay protection configuration and setting. 4.4 During the high and low voltage ride-through process, SVC and STATCOM should maintain grid-connected operation, and the relay protection cannot malfunction. Applied to wind power For SVC and STATCOM that have special needs such as access, photovoltaic access, and DC drop point, the relay protection should be able to meet the system operation requirements. 4.5 Follow the principle of "strengthening the main protection and optimizing the backup protection" for protection configuration and setting. 4.6 The adaptability of relay protection to SVC and STATCOM should be implemented first through the device's own principles and algorithms. At the same time, it should be combined Features Reasonable and correct setting of protection. 4.7 The fixed value setting of the protection device should meet the requirements of the protection function, and be as simple and easy to set as possible. 4.8 The relay protection of SVC and STATCOM should be relatively independent of the control system. 4.9 The protection functions and performance of SVC and STATCOM valve control systems shall comply with GB/T 20298, DL/T 1010.3, DL/T 1215.3, NB/T 42043 request.

5 Principles of SVC Relay Protection Configuration

5.1 General provisions 5.1.1 The protection configuration should meet the requirements of reliability, selectivity, sensitivity and quick-action, and be independent, complete, complete, and consistent with Meet the requirements of GB/T 14285 and DL/T 478. 5.1.2 110kV and below voltage level SVC can be equipped with a set of electrical quantity protection, 220kV and above voltage level or other special requirements The SVC is equipped with two sets of electrical protection according to the principle of duality. 5.1.3 A microcomputer-based protection device integrating the main and rear should be used, and the protection device should be able to reflect various faults and abnormal conditions of the protected equipment. 5.1.4 The protection of the control part shall be completed by its controller. 5.1.5 Different types of protection functions in the device should be able to be easily put in and out. 5.1.6 The protection setting value adopts the secondary value, the setting value setting range should be able to meet the needs of the project, and the protection setting value should be able to be viewed from the device panel or monitoring background enter. 5.1.7 The electrical quantity protection configuration includes but is not limited to. TCR branch angle external current protection, TCR branch angle internal current protection, FC branch circuit Current protection, FC branch voltage protection, etc. 5.2 TCR branch circuit corner current protection 5.2.1 Configure two-stage over-current protection as protection for short-circuit of TCR branch leads. 5.2.2 The overcurrent protection current is taken from the CT near the busbar side outside the corner, and the fundamental wave current is used. 5.2.3 For low-resistance grounding systems, a two-stage zero-sequence current protection should also be configured as ground fault protection, which acts on tripping. 5.3 TCR branch current protection 5.3.1 Configure two-stage over-current protection as the protection of TCR valve group and lead short circuit, using fundamental wave current. 5.3.2 Configure thermal overload protection (current includes fundamental wave and 11th and below harmonic components) as reactor overload protection, which acts on Tripped. 5.3.3 The overcurrent protection and thermal overload protection currents are taken from the CT inside the corner. 5.4 FC branch protection 5.4.1 Configure two-stage overcurrent protection, which acts on tripping. Fundamental current is used for overcurrent protection. 5.4.2 Equipped with over-voltage protection, the over-voltage component (line voltage) adopts "or" logic, with a time limit for tripping. 5.4.3 Equipped with low-voltage protection, low-voltage components (line voltage) adopt "or" logic, with a time limit for tripping. Effective measures should be taken To prevent PT disconnection and malfunction of low-voltage protection during circuit breaker closing. 5.4.4 Configure unbalance protection such as neutral point unbalanced current, open delta voltage, bridge differential current or phase voltage differential, as the FC internal For the protection of partial faults, the three-phase unbalanced element adopts "or" logic, with a time limit for tripping. 5.4.5 Configure thermal overload protection (current includes fundamental wave and harmonic components of the 11th order and below) as equipment overload protection, which acts on tripping brake. 5.4.6 For low-resistance grounding systems, a two-stage zero-sequence current protection should also be configured as ground fault protection, which acts on tripping.

6 SVC Relay Protection Setting Principle

6.1 General provisions 6.1.1 The setting of relay protection should meet the requirements of quick action, selectivity and sensitivity. Home. 6.1.2 The setting of SVC relay protection should be coordinated with the grid protection to prevent the scope of accidents caused by improper setting from expanding. 6.1.3 The protection setting should be adapted to the different operating conditions and adjustment process of the SVC. 6.1.4 The current setting value should be higher than the minimum sampling accuracy of the protection device, and should not be lower than 0.05In (In is the secondary rated current of CT, such as 1A or 5A). 6.1.5 Relay protection setting calculation parameters include. FC rated capacity, rated voltage, rated current, capacitive reactance value; TCR rated capacity, Rated voltage, rated current, reactance value; PT transformation ratio, CT transformation ratio, etc. 6.2 TCR branch circuit corner current protection 6.2.1 The setting value of the over-current section I current should be set according to the sufficient sensitivity when the TCR head-end lead fails, and the sensitivity coefficient should not be less than 1.5, which should be set to (3～5) Times the rated current, and the time is 0 s. 6.2.2 The setting value of the overcurrent section II current should reliably avoid the rated current outside the TCR angle, and should be set to (1.5～2.0) times the rated current outside the angle. Take 0.3 s in between. 6.2.3 The neutral point is connected to a low resistance grounding system, and the zero sequence I section current is set according to the sensitivity to the single-phase grounding fault of the TCR lead wire. The sensitivity coefficient is not less than 2, and the action time should meet the requirements of system operating voltage adaptability. The fixed value of the zero sequence II stage current is displayed during normal operation. For the zero sequence current setting, the time should be one step longer than the zero sequence I section. 6.3 TCR branch circuit corner current protection 6.3.1 The setting value of the over-current section I current should avoid the inrush current in the angle when the TCR is turned on, and it should be set to (3～5) times the rated current in the angle. Take 0 s in between. 6.3.2 The setting value of the overcurrent section II current should reliably avoid the rated current in the TCR angle, and it should be set to (1.5～2.0) times the rated current in the angle. Take 0.3 s in between. 6.3.3 The overload protection current setting should reliably avoid the rated current in the TCR angle, and should be set to (1.05～1.1) times the rated current in the angle. The time is 10 s. 6.3.4 The thermal overload protection setting is set according to the calculation method and setting provided by the SVC equipment manufacturer. 6.4 FC branch protection 6.4.1 The setting value of the over-current section I current is set according to the sufficient sensitivity of the FC head-end lead failure, and the sensitivity coefficient is not less than 1.5, which should be selected (3～5) Times the rated current, and the time is 0.1s. 6.4.2 The setting value of the overcurrent section II current is set according to the FC rated current, it is better to take (1.5~2) times the rated current, and the time is 0.3s. 6.4.3 The over-voltage protection is set according to the equipment withstand capability and grid operation requirements, and is matched with the high voltage ride-through capability. The voltage setting should be 1.3 times the rated voltage setting, the action time is 10s. 6.4.4 The low-voltage protection is set according to the reliable action after the bus bar connected to the FC loses voltage, and is matched with the low voltage ride-through capability, and is standby with the bus Cooperate with the fixed value of the power supply automatic switching device. The voltage setting value should be (0.2～0.6) times the rated voltage, and the time setting value is the last stage of the back-up protection for the outgoing line on this side. Cooperate. In order to prevent the PT disconnection protection from malfunctioning, the current should be blocked, and the fixed value should be set at (0.5～0.8) times the rated current. 6.4.5 Unbalanced voltage protection, unbalanced current protection, phase voltage differential protection, bridge differential current protection and other unbalanced protection settings are based on FC The calculation method and value setting provided by the manufacturer. 6.4.6 The thermal overload protection setting is set according to the calculation method and setting provided by the SVC equipment manufacturer. 6.4.7 The neutral point is through a low resistance grounding system, and the zero sequence I section current setting is based on the sensitivity setting to the single-phase grounding fault of the FC head lead. The sensitivity coefficient is not less than 2, and the action time should meet the requirements of system operating voltage adaptability. The fixed value of the zero sequence II stage current is displayed during normal operation. For the zero sequence current setting, the time should be one step longer than the zero sequence I section.

7 Principles of STATCOM relay protection configuration

7.1 General provisions 7.1.1 The protection configuration should meet the requirements of reliability, selectivity, sensitivity and quick-action, and be independent, complete, complete and consistent. Meet the requirements of GB/T 14285 and DL/T 478. 7.1.2 A microcomputer-based protection device with integrated main and rear should be adopted. For dual redundant protection, the two sets of protection and circuits are completely independent. Protective gear The device should be able to reflect various faults and abnormal states of the protected equipment. 7.1.3 The protection of the control part shall be completed by its controller. 7.1.4 Different types of protection functions in the device should be able to be easily put in and out. 7.1.5 The protection setting adopts the secondary value, the setting range of the setting should be able to meet the needs of the project, and the setting of the protection should be able to be viewed from the device panel or monitoring background enter. 7.1.6 Electrical quantity protection configuration includes but not limited to. current protection inside the corner, current protection outside the corner, star connection current protection, voltage protection Wait. 7.2 Out-of-angle current protection 7.2.1 Configure two-stage overcurrent protection as the protection of STATCOM phase-to-phase short circuit. 7.2.2 Configure overload protection, with a time limit to act in the transmission. 7.2.3 The overcurrent protection and overload protection currents are taken from the CT o......

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