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DL/T 2009-2019: (Ultra-high voltage controllable shunt reactor relay protection configuration and tuning technical specifications)
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(Ultra-high voltage controllable shunt reactor relay protection configuration and tuning technical specifications)
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Basic data | Standard ID | DL/T 2009-2019 (DL/T2009-2019) | | Description (Translated English) | (Ultra-high voltage controllable shunt reactor relay protection configuration and tuning technical specifications) | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | K45 | | Word Count Estimation | 20,244 | | 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 2009-2019: (Ultra-high voltage controllable shunt reactor 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 controlled shunt reactor of extra high voltage
ICS 29.240
K 45
Record number. 63143-2018
People's Republic of China Electric Power Industry Standard
Relay protection configuration of ultra-high voltage controllable parallel reactor and
Setting technical specifications
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Preface... III
1 Scope...1
2 Normative Reference Documents...1
3 Terms and Definitions...1
4 General Provisions...2
5 Principles of relay protection configuration for transformer-type controllable shunt reactors...2
6 Setting principles for relay protection of transformer-type controllable shunt reactors...5
7 Principles of Relay Protection Configuration of Magnetically Controlled Controllable Shunt Reactor...6
8 Setting principles for relay protection of magnetically controlled shunt reactors...8
9 Relevant relay protection configuration and setting requirements of the power grid where the controllable shunt reactor is located...9
Appendix A (informative appendix) Basic principles of controllable shunt reactors... 12
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. State Grid Corporation Northwest Branch, State Grid Qinghai Electric Power Co., Ltd., State Grid Gansu Electric Power Co., Ltd., West
An Jiaotong University, China Electric Power Research Institute Co., Ltd., Nanjing Nanrui Relay Electric Co., Ltd., Beijing Sifang Relay Automation Co., Ltd.
Co., Ltd., China Power Preh Technology Co., Ltd., State Grid Chongqing Electric Power Co., Ltd.
The main drafters of this standard. Zhang Jiankang, Su Xiaohua, Li Hongzhi, Zhao Yi, Jiao Zaibin, Wei Lin, Zhao Xicai, Du Dingxiang, Mo Pinhao,
Zhang Linghua, Li Lanfang, Huang Hui.
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)
No. 1, 100761).
Technical specification for relay protection configuration and setting of ultra-high voltage controllable shunt reactor
1 Scope
This standard specifies the relay protection configuration and setting technical principles of transformer-type and magnetic-control-type controllable shunt reactors.
Technical requirements are put forward for the configuration and setting of related relay protection of the power grid where the device is located.
This standard applies to the controllable shunt reactors with voltage levels of 500kV and 750kV and the grid connected to them. Other voltage levels can be referred to
Follow the execution.
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 2900.95 Electrotechnical terminology transformer, voltage regulator and reactor
GB/T 14285 Technical Regulations for Relay Protection and Safety Automatic Equipment
GB/T 15145 General technical conditions for transmission line protection devices
GB/T 20840.2 Transformer Part 2.Supplementary Technical Requirements for Current Transformer
GB/T 31955.1 Technical Specification for Control and Protection System of Ultra-High Voltage Controllable Shunt Reactor Part 1.Graded Regulator
DL/T 242-2012 General technical conditions for high-voltage shunt reactor protection devices
DL/T 478 General technical requirements for relay protection and safety automatic devices
DL/T 559 220kV～750kV power grid relay protection device operation setting regulation
DL/T 670 General technical conditions for bus protection devices
DL/T 866 Current transformer and voltage transformer selection and calculation guide
DL/T 886 Technical guidelines for 750kV power system relay protection
DL/T 1193-2012 Flexible transmission terms
DL/T 1217 Technical specification for magnetron controllable shunt reactor
DL/T 1376-2014 Technical specification for ultra-high voltage graded controllable shunt reactor
3 Terms and definitions
GB/T 2900.1, GB/T 2900.17, GB/T 2900.49, GB/T 2900.95, DL/T 1376-2014 and the following terms defined
And definitions apply to this document.
3.1
Controlled shunt reactor; CSR
A reactor whose reactance value can be adjusted online in parallel with the power system.
[DL/T 1376-2014 definition 3.1]
3.2
Transformer type controlled shunt reactor; TTCSR
A controllable shunt reactor that adjusts the reactance value by changing the equivalent impedance of the low-voltage side of the high-impedance transformer. The reactance value can only be
It is limited to switching between levels and belongs to the hierarchical adjustable controllable shunt reactor.
[DL/T 1193-2012, definition 4.5.1, with modification]
3.3
Magnetically controlled shunt reactor; MCSR
The controllable shunt reactor that realizes the adjustment of the reactance value by changing the saturation degree of the reactor core, its reactance value can be continuously changed, which belongs to
It is a continuously adjustable controllable shunt reactor.
[DL/T 1193-2012, definition 4.5.2, with modification]
3.4
Line side controlled shunt reactor
As a part of the line, it is generally connected to the line through an isolating switch, and can only be turned on and back together with the line.
Reactor, the line-side controllable shunt reactor is usually grounded through the neutral point reactor.
[DL/T 1193-2012 definition 4.5.5]
3.5
Bus side controlled shunt reactor for bus
A controllable shunt reactor that is connected to the bus through a circuit breaker and can be switched on and off separately. The controllable shunt reactor for the bus is usually directly grounded.
[DL/T 1193-2012 definition 4.5.6]
3.6
Grid side winding
Winding directly connected to the grid.
[DL/T 1193-2012 definition 4.5.8]
3.7
Control winding
Windings that are electrically connected to the controllable shunt reactor adjustment and control device can be controlled by changing the current flowing through the windings
Adjustment of parallel reactor capacity.
[DL/T 1193-2012 definition 4.5.9]
3.8
Auxiliary winding
Windings with auxiliary functions such as connecting filters or providing power for adjustment and control devices.
[DL/T 1193-2012 definition 4.5.10]
3.9
Magnetic balance differential protection
For the transformer-type controllable shunt reactor, the differential protection is constituted by the principle of the magnetic field ampere-turn balance between the control winding and the grid-side winding. Its guarantee
The protection range includes the control winding and the grid-side winding of the reactor, which is also called the large differential protection of the controllable shunt reactor.
[DL/T 242-2012 definition 3.4]
4 General
4.1 The controllable shunt reactor in this standard includes two types. transformer type and magnetic control type. See Appendix A for its basic principles.
4.2 Coordination of primary and secondary equipment selection should be done in the planning and design stage, 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.
4.3 The configuration and setting of the controllable shunt reactor protection should be coordinated with the operation requirements of the power grid, following the "strengthening the main protection and optimizing the backup protection"
The principle of protection configuration and setting.
4.4 The adaptability of the relay protection to the controllable shunt reactor is preferably realized through the device's own principles and algorithms. At the same time, it should be combined with operating characteristics
Correctly and reasonably set the protection. Prioritize the implementation of related protection functions through the protection device itself, and reduce the amount of external input as much as possible to reduce
Dependence on related circuits and equipment.
4.5 The setting value of the protection device should meet the requirements of the protection function, and be as simple and easy to set as possible; multiple sets of switchable setting should be set.
Value group; the protection device should not malfunction during the setting or switching process.
4.6 The controllable shunt reactor protection device for the busbar should have T zone or short lead protection function, or be equipped with independent T zone or short lead protection.
Protective device, as the protection of the reactor head bushing to the lead area of the circuit breaker.
4.7 The configuration and setting of the relay protection of the power grid where the controllable shunt reactor is located should consider the influence of the controllable shunt reactor.
The adaptability of relay protection is studied and demonstrated.
4.8 The protection function and performance of the controllable shunt reactor valve control system shall meet the requirements of GB/T 31955.1, DL/T 1217, and DL/T 1376.
4.9 In this standard, the transformer-type controllable shunt reactor takes the line-side controllable shunt reactor connected with a 3/2 circuit breaker as an example. The magnetic control type is controllable.
The shunt reactor takes the controllable shunt reactor for the bus connected to the 3/2 circuit breaker as an example. For other situations, please refer to the implementation.
5 Configuration principle of relay protection for transformer-type controllable shunt reactor
5.1 General provisions
5.1.1 The relay protection device should meet the requirements of reliability, selectivity, sensitivity and quick action, and be independent, complete and complete.
Comply with GB/T 14285 and DL/T 478 regulations.
5.1.2 The controllable shunt reactor shall be equipped with dual electric quantity protection and a set of non-electric quantity protection. Double relay protection including protection device
The dualization of the circuit and the dualization of the circuit related to the realization of the protection function, the protection device of the dual configuration should adopt the products of different manufacturers.
5.1.3 A microcomputer-based protection device integrating main and rear should be used. The protection device should be configured independently and should not be integrated with other systems. The protection device should
It can respond to various faults and abnormal states of the controllable shunt reactor.
5.1.4 Non-electric quantity protection should be independent of electrical quantity protection configuration, and have an independent power circuit and trip outlet circuit.
5.1.5 The protection of the control part of the controllable shunt reactor shall be completed by its controller.
5.1.6 The performance of the protection transformer should meet the requirements of GB/T 20840.2 and DL/T 866, and its configuration should avoid the dead zone of the protection. difference
The relevant characteristics of CT for dynamic protection shall be consistent.
5.1.7 When the controllable shunt reactor protection trips, it acts on the three-phase trip. The different types of protection functions in the device should be able to be easily put in and out
Out.
5.1.8 The CT transformation ratio of each side of the controllable shunt reactor protection should not make the balance coefficient greater than 10, 3/2 the CT transformation ratio of the two branches of the circuit breaker wiring
And characteristics should be consistent.
5.1.9 The protection device should have a fixed value automatic setting function, and the fixed value setting range should be able to meet the needs of the project.
5.1.10 The electrical quantity protection configuration includes but is not limited to. magnetic balance differential protection, grid-side winding differential protection, grid-side winding inter-turn protection, grid
Side winding backup protection, control winding backup protection, neutral point reactor backup protection. The specific configuration is shown in Figure 1.
Figure 2 Schematic diagram of electrical protection configuration of transformer-type controllable shunt reactor
5.1.11 When there is no dedicated circuit breaker, when the line side controllable shunt reactor protection action trips, in addition to tripping the circuit breaker on the side, it should also
Trip the circuit breaker on the opposite side of the line through the remote transmission loop of line protection.
5.2 Main protection
5.2.1 Magnetic balance differential protection
The magnetic balance differential protection configuration meets the following requirements.
a) The protection scope includes the control winding and grid-side winding of the reactor, including differential quick-break and ratio differential.
Router
b) It should have a differential quick-break function that responds to serious internal faults;
c) It shall have the braking characteristics to prevent the malfunction of the protection against the fault outside the zone, and the protection against the transient saturation of the CT caused by the fault outside the zone
Malfunctioning function;
d) It shall have the function of preventing the malfunction of the protection caused by the excitation inrush current;
e) It shall have the function of discriminating the disconnection of the secondary circuit of the CT on the grid side, and be able to give an alarm. Whether to block the differential protection can be realized by setting;
f) Differential quick break action time (2 times the setting value) should not be greater than 20ms;
g) Ratio differential action time (2 times the setting value) should not be greater than 50ms;
h) The current imbalance caused by the inconsistent CT ratio should be compensated by software.
5.2.2 Grid-side winding differential protection
The grid-side winding differential protection configuration meets the following requirements.
a) Differential protection composed of the current at the first and end of the grid-side winding, which protects the grounding and phase-to-phase faults inside the winding, including differential quick-break and ratio
Rate differential, the protection action is to trip the grid-side circuit breaker;
b) It should have a differential quick-break function that responds to serious internal faults;
c) It shall have the braking characteristics to prevent the malfunction of the protection of the fault outside the zone, and the protection fault caused by the transient saturation of the CT caused by the fault outside the zone.
Dynamic function
d) It shall have the function of discriminating the disconnection of the CT secondary circuit, and be able to give an alarm. Whether to block the differential protection can be realized by setting;
e) Differential quick break action time (2 times the setting value) should not be greater than 20ms;
f) Ratio differential action time (2 times the setting value) should not be greater than 30ms;
g) Current imbalance caused by inconsistent CT ratio should be compensated by software.
5.2.3 Zero sequence current differential of grid side winding
The grid-side winding zero sequence current differential protection configuration meets the following requirements.
a) Differential protection composed of self-generated zero-sequence current at the first and end of the grid-side winding to protect the ground fault inside the winding, including differential quick-break and
Ratio differential, the protection action is to trip the grid-side circuit breaker;
b) It should have a zero sequence differential quick-break function that responds to serious internal faults;
c) It shall have the braking characteristics to prevent the malfunction of the fault outside the zone, and prevent the protection fault caused by the CT transient saturation caused by the fault outside the zone.
Dynamic function
d) It shall have the function of discriminating the disconnection of the CT secondary circuit, and be able to give an alarm. Whether to block the differential protection can be realized by setting;
e) The differential action time (2 times the setting value) should not be greater than 30ms;
f) When the CT ratios are inconsistent, the current compensation should be realized by software.
5.2.4 Grid-side winding inter-turn protection
The inter-turn protection configuration of the grid-side winding meets the following requirements.
a) It should react sensitively to the inter-turn fault in the grid-side winding of the reactor. When a short-circuit fault of no less than 3% occurs, the inter-turn protection should be instantaneous
Action to trip the grid-side circuit breaker. In non-full-phase operation, the protection should operate correctly if there is no less than 6% inter-turn short circuit in the healthy phase;
b) In the case of CT secondary circuit disconnection or PT secondary circuit disconnection, it should not malfunction.
5.2.5 Control winding inter-turn protection (optional)
The control winding inter-turn protection configuration meets the following requirements.
a) The reactor should be sensitive to the inter-turn fault in the control winding, and the protection action is to trip the grid side circuit breaker;
b) In the case of CT secondary circuit disconnection or PT secondary circuit disconnection, it should not malfunction.
5.3 Grid-side winding backup protection
5.3.1 Overcurrent protection
The overcurrent protection shall adopt the current at the first end of the winding on the grid side of the reactor to reflect the internal fault of the reactor, and the protection action is to trip the grid side circuit breaker.
5.3.2 Zero sequence current protection
The zero-sequence current protection should adopt the self-produced zero-sequence current at the head end of the winding on the grid side of the reactor to react to the reactor grounding fault, and the protection action is to trip the grid
Side circuit breaker.
5.3.3 Overload protection
The overload protection should adopt the current of the first end of the winding of the reactor on the grid side to reflect the overload of the reactor due to the increase in voltage.
signal.
5.4 Control winding backup protection
5.4.1 Overcurrent protection
The over-current protection of the control winding adopts the current at the head end of the control winding to prevent damage to the control winding when a large current flows, and the protection action is tripped
Grid-side circuit breaker.
5.4.2 Zero sequence current protection
The zero sequence current protection configuration meets the following requirements.
a) The self-produced zero-sequence current protection of the control winding adopts the self-produced zero-sequence current at the head end of the control winding, and the reaction reactor controls the winding ground fault and
Inter-turn fault
b) The external zero-sequence current protection of the control winding shall adopt the external zero-sequence current of the control winding to reflect the ground fault of the control winding;
c) The protection action is divided into two time limits, the first time limit closes the bypass circuit breaker of the control winding, and the second time limit trips the network side winding circuit breaker.
5.5 Neutral point reactor backup protection
5.5.1 Overcurrent protection
The neutral point reactor overcurrent protection should reflect the neutral point reactor overcurrent caused by three-phase asymmetry and other reasons, and the protection action is to trip the network.
Side circuit breaker.
5.5.2 Overload protection
The neutral point reactor overload protection should monitor the three-phase unbalanced state, and the delay acts on the signal.
5.6 Non-electricity protection
5.6.1 Reactor heavy gas, light gas, winding temperature, pressure release, oil temperature, oil level, cooling system protection, etc., combined with primary equipment
Structure and feature configuration.
5.6.2 When the non-electricity protection trips, it shall act on the two trip coils of the grid-side circuit breaker at the same time.
5.6.3 For direct trip relays used for non-electrical tripping, the starting power should be greater than 5 W, and the operating voltage should be 55% ~ of the rated DC power supply voltage.
Within the range of 70%, the action time under the rated DC power supply voltage is 10 ms～35 ms, and it should have the ability to resist 220 V power frequency voltage interference.
6 Setting principle of relay protection of transformer-type controllable shunt reactor
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 the controllable shunt reactor protection should be coordinated with the grid protection to prevent the expansion of the accident scope caused by improper setting.
6.1.3 The protection setting should be adapted to the different operating conditions and adjustment processes of the controllable shunt reactor.
6.1.4 The protection setting should adopt the secondary value, and input the necessary parameters such as the rated capacity of the reactor, the transformation ratio of CT and PT.
6.1.5 The selection of CT transformation ratio for controllable shunt reactor protection should give priority to the precision current demand of reactor protection.
6.1.6 The relay protection setting calculation parameters of the transformer-type controllable shunt reactor include. grid side and control winding rated capacity, rated voltage,
Rated current, rated reactance value and overload capacity, neutral point reactance rated current, reactance value and short-time current capacity, PT transformation ratio on each side,
CT ratio and accuracy level.
6.2 Main protection
6.2.1 The fixed value of the minimum operating current of the ratio differential protection is set according to the maximum unbalanced current when reliably avoiding the rated load of the reactor. In engineering
In the practical setting calculation, (0.3～0.4) times the rated current of the reactor can be selected, and the unbalanced current in the differential circuit should be measured, if necessary
Can be enlarged appropriately.
6.2.2 The setting value of the differential quick-break protection should reliably avoid the inrush current of the reactor, and (3～5) times the rated current of the reactor can be taken. CT disconnection
Locking reactor differential protection, when the differential current is greater than 1.2 times the rated current of the reactor after the CT is disconnected, the differential should be tripped out.
6.2.3 The primary value of the zero sequence impedance of the grid side winding is calculated by the device according to formula (1)
6.2.4 The setting value of the inter-turn protection of the grid-side winding and the control winding is determined by the manufacturer according to its enterprise product standard.
6.3 Grid-side winding backup protection
6.3.1 The overcurrent protection is set according to the overcurrent that may be generated by the grid-side winding during operation.
(1.4～2) Time setting, the delay should be 1.5s～3s.
6.3.2 The zero-sequence current protection is set according to the excitation inrush current that avoids no-load input and the zero-sequence current during non-full-phase operation. The current setting can be set according to the grid side
The setting is (1.3~2) times the rated current of the winding, and the time setting should be matched with the backup section of the line grounding protection, preferably 1.5s~3s.
6.3.3 The overload protection is set according to the rated current of the grid-side winding. The current setting can be set at 1.1 times the rated current of the grid-side winding.
It's time to take 5s.
6.4 Control winding backup protection
6.4.1 The overcurrent protection setting is based on the control winding overload capacity setting. The protection may not be cast.
6.4.2 The current setting of zero sequence current protection is set according to the maximum unbalanced current when the...
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