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DL/T 2030-2019: (Power transmission and transformation loop reliability evaluation procedures)
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(Power transmission and transformation loop reliability evaluation procedures)
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DL/T 2030-2019
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Basic data | Standard ID | DL/T 2030-2019 (DL/T2030-2019) | | Description (Translated English) | (Power transmission and transformation loop reliability evaluation procedures) | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | F21 | | Word Count Estimation | 18,194 | | 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 2030-2019: (Power transmission and transformation loop reliability evaluation procedures)---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.
(Power transmission and transformation loop reliability evaluation procedures)
ICS 27.020
F 21
Record number. 63143-2018
People's Republic of China Electric Power Industry Standard
Reliability Evaluation Regulations for Transmission and Distribution Circuits
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Table of Contents...I
Foreword...II
1 Scope...1
2 Terms and definitions...1
3 Circuit division and naming...2
4 Loop status...3
5 Loop evaluation index and calculation formula...4
6 Statistical evaluation requirements...12
Appendix A...15
Appendix B...16
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009 "Guidelines for Standardization Work Part 1.Standard Structure and Compilation".
Please note that certain contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents.
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the Power Industry Reliability Management Standardization Technical Committee (DL/T C31).
Drafting organizations of this standard. China Electricity Council, State Grid Co., Ltd., State Grid Hubei Electric Power Co., Ltd.
The main drafters of this standard. Zhou Xia, Li Xia, Tian Hongxun, Wang Honggang, Zheng Haifeng, Wei Yongzhong, Shen Li, Hu Qinghui, Huang Zeqi, Xie Xiaodong.
The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of the China Electricity Council (Beijing
No. 1 Ertiao, Baiguang Road, 100761).
Reliability Evaluation Regulations for Transmission and Distribution Circuits
1 Scope
This standard specifies statistical indicators and evaluation methods for the reliability of power transmission and transformation circuits.
This standard applies to the reliability statistics of power transmission and transformation circuits of power transmission and power supply enterprises.
2 Terms and definitions
The following terms and definitions apply to this standard.
2.1
Circuit of transmission and transformation
A set of components connecting two or more transmission terminals, substations, or system transmission nodes in a power transmission and transformation system
Together, it is called the transmission and transformation loop (hereinafter referred to as the loop). The circuit includes three parts. substation circuit, transmission circuit and bus circuit.
The loop has the following functions.
a) Transmission of electric energy from one end to the other within a specific capacity range;
b) Provide a variable connection for the system;
c) Under certain specific circumstances, it can automatically isolate itself from the entire power transmission and transformation system.
2.1.1
Transformation circuit
With transformer as the main body, it is a collection of components that realize the function of electric energy conversion between different voltage levels. Line transformer group press change
Statistics of electrical circuits are called line-transformation group transformation circuits.
2.1.2
Transmission circuit
Take the transmission line as the main body to realize the set of components for power transmission between different points (substation, power plant or user)
Together.
2.1.3
Bus circuit
A collection of components that connect two or more power transmission circuits and substation circuits to realize electric energy collection and distribution.
2.2
Number of circuit terminal
The circuit itself belongs to realize the electrical connection and can complete all the terminals of the power transmission function.
2.3
Circuit relationship
The active power transmission relationship between two interconnected circuits. The circuit correlation is divided into one-way according to the active power transmission direction
And two-way. The network topology structure of the power transmission and transformation system can be formed through the loop correlation.
2.4
Number of circuit connection
The sum of the number of other circuits connected to the circuit.
2.5
Number of circuit power supply
The sum of the number of other circuits that are connected to the circuit and can provide active power to this circuit.
2.6
Circuit capacity
The sum of the rated capacity of each transformer in the substation circuit (in MVA).
2.7
Circuit length
The sum of the length of the overhead line and the cable line in the transmission circuit, and the sum of the length of the trunk line and the branch line (unit
km).
2.8
Number of circuit
The number of loops in the power transmission and transformation system at the end of the statistical period.
2.9
Period hours
When the loop is in use, select the number of hours during the period according to statistical needs.
2.10
Statistical loop (km) year unit years
The number of circuits (km) and years of the transmission and transformation system circuits during the statistical period, if the circuits were put into operation for less than one year during the statistical period
It is converted according to actual time.
(1)
2.11
Circuit regional administrative level
The management level of the unit to which all the components contained in the transmission circuit and the line-transformation group substation circuit belong. There are four levels of loop area
The categories are the cross-network circuit (W), the cross-provincial circuit (S), the cross-regional city circuit (J) and the local circuit (B). Loop area
The level is higher than or equal to the level of the line area it contains.
3 Circuit division and naming
3.1 Principle of circuit division
The circuit division should conform to the following principles.
a) A single element should belong to a loop at a point in time.
b) The internal components of combined electrical appliances (including GIS, H-GIS, PASS, COMPASS, etc.) should be divided into
In the corresponding loop.
c) The circuit boundary components of the bus circuit, the substation circuit and the transmission circuit should be the components with breaking function, and the circuit boundary
The components belong to the bus circuit.
3.2 Transformer circuit
3.2.1 The transformer body and the equipment within the boundary point of the bus circuit on each side (excluding the bus side isolating switch) are classified as transformer
Electric circuit. The substation circuit of the line substation includes the equipment within the demarcation point of the line and the bus circuit of the substation on each side. Single-phase transformation
The three-phase transformer group composed of transformers is counted as a substation loop. Statistics on AC side of converter transformer in DC converter station
It is a substation loop, including the following situations.
a) Conventional DC converter station (converter station of ±660kV and below). the top wiring board of the grid-side bushing of each pole converter transformer
All equipment between the connection points of the AC field bus circuit is defined as a substation circuit.
b) Back-to-back DC converter station. the top wiring board of the grid-side bushing of the converter transformer on each side of each unit to the AC field bus bar of that side
All devices between the connection points are defined as a substation circuit.
c) UHV DC converter station (±800kV and above converter station). high-end (or low-end) converter transformer grid side of each pole
All equipment between the wiring board at the top of the bushing and the connection point of the AC field bus circuit is defined as a substation circuit.
3.2.2 The substation circuit is named with "substation name" plus "voltage level" plus "transformer name", and the line substation circuit is named
"Voltage level" plus "line name" is named.
3.3 Transmission circuit
3.3.1 The transmission line body and the equipment within the demarcation point of the bus circuit of the substation connected to each side (excluding bus side isolation
Switch) is divided into transmission circuits.
3.3.2 The transmission circuit is named with "voltage level" plus "line name".
3.4 Bus circuit
3.4.1 All busbars of the same voltage level in the substation and the communication equipment between them, including the isolation that is directly connected to the busbar
The components that are connected to the bus and do not form a loop separately should be classified as bus loops. The same in the same substation
The busbars with no direct electrical connection should be divided into different busbar circuits.
3.4.2 The bus circuit is named with "Substation Name" plus "Voltage Level". There are multiple for the same voltage level in the same substation.
For the bus circuit, name it with "Substation Name" plus "Voltage Level" plus the bus circuit group number.
4 Loop status
4.1 Use
The loop will be used as a statistical object since it is put into production. Usage status is divided into available status and unavailable status
state. Refer to Figure 1 for the state of loop reliability, and refer to Appendix A for the comparison table of Chinese and English states.
Figure 1 Divide the reliability status of the loop
4.1.1 Available
The circuit is in the state of running or dispatching outage, and it is judged to be available.
4.1.1.1 Operation
The state where the loop is electrified and can complete the power transmission function within a certain capacity range is judged to be the operating state.
4.1.1.2 Outage
The circuit loses the function of transmitting electric energy from one end to the other within a certain capacity range, and it is judged to be out of service.
state. When only part of the circuit loses the power transmission function, it is determined that the circuit is partially out of operation.
4.1.1.3 Dispatch outage
The outage of the loop caused by the dispatch command due to the adjustment of the system operation mode is judged as the dispatch outage state.
4.1.2 Not available
The circuit is in the state of affected shutdown, planned shutdown or failure shutdown, and it is judged as unavailable.
4.1.2.1 Affected outage
The forced outage caused by the related circuit outage or external reasons, etc., is judged to be the affected outage state.
4.1.2.2 Planned outage
Due to the internal components of the loop (including secondary systems, auxiliary facilities, etc.), it is necessary to submit an application to the dispatcher 24 hours in advance.
Please and obtain the approval of the shutdown, and determine the planned shutdown status.
4.1.2.3 Failure shutdown
Any outage of the loop that has not been approved by the dispatch, or although approved by the dispatch, it cannot be delayed until the outage after 24 hours (from
Start timing from the dispatch application), it is judged as a fault shutdown state.
4.1.3 Instantaneous shutdown
The outage of the circuit whose duration does not exceed 1 min is judged as an instantaneous outage state, such as automatic reclosing of the transmission circuit
The coincidence is successful.
4.1.3 Conversion factor of circuit outage
For partial outage loop events, the coefficient determined by considering the influence of outage on loop function is expressed by λ.
(2)
5 Loop evaluation index and calculation formula
Refer to Appendix B for the comparison table of circuit reliability indicators in Chinese and English.
5.1 Basic indicators
5.1.1 Equivalent hours of loop dispatch outage
The equivalent hours of loop dispatch outage are calculated according to formula (3).
[Hours] (3)
5.1.2 Equivalent hours when the circuit is affected and out of operation.
The equivalent hours of circuit involvement and outage are calculated according to formula (4).
[Hours] (4)
5.1.3 Equivalent hours of planned outage of loop.
The equivalent hour of the planned outage of the loop is calculated according to formula (5).
[Hours] (5)
5.1.4 Hours of loop failure.
The equivalent hours of circuit failure and shutdown are calculated according to formula (6).
[Hours] (6)
5.1.5 Equivalent hours when the circuit is unavailable.
The unavailable equivalent hours of the circuit are calculated according to formula (7).
[Hours] (7)
5.2 General indicators
5.2.1 Loop availability factor.
The loop available coefficient is calculated according to formula (8).
[%](8)
5.2.2 Loop outage rate.
The loop outage rate is calculated according to formula (9).
[Times/Circuit·Year] (9)
5.2.2.1 Loop dispatch outage rate.
The loop dispatch outage rate is calculated according to formula (10).
[Times/Circuit·Year] (10)
5.2.2.2 Involved outage rate of loop.
The outage rate of the loop involved is calculated according to formula (11).
[Times/Circuit·Year] (11)
5.2.2.3 The planned outage rate of the loop.
The planned outage rate of the loop is calculated according to formula (12).
[Times/Circuit·Year] (12)
5.2.2.4 Outage rate of loop failure.
The outage rate of loop failure is calculated according to formula (13).
[Times/Circuit·Year] (13)
5.2.2.5 The instantaneous outage rate of the circuit.
The instantaneous outage rate of the loop is calculated according to formula (14).
[Times/Circuit·Year] (14)
5.2.3 Circuit outage time.
The outage time of the loop is calculated according to formula (15).
[Hours] (15)
5.2.3.1 Outage time for loop scheduling.
The outage time of loop dispatch is calculated according to formula (16).
[Hours] (16)
5.2.3.2 Outage time when the circuit is affected.
The cycle involved and outage time is calculated according to formula (17).
[Hours] (17)
5.2.3.3 The planned shutdown time of the loop.
The planned outage time of the loop is calculated according to formula (18).
[Hours] (18)
5.2.3.4 Outage time for loop failure.
The outage time of loop failure is calculated according to formula (19).
[Hours] (19)
5.2.4 Recovery time of circuit outage.
The recovery time of loop outage is calculated according to formula (20).
[Hour/time] (20)
5.2.4.1 Recovery time of loop dispatch outage.
The recovery time of loop dispatch outage is calculated according to formula (21).
[Hour/Time] (21)
5.2.4.2 The recovery time of the circuit affected by outage.
The recovery time of the circuit from the affected outage is calculated according to formula (22).
[Hour/Time] (22)
5.2.4.3 Recovery time of planned outage of loop.
The recovery time of the planned outage of the loop is calculated according to formula (23).
[Hour/Time] (23)
5.2.4.4 Recovery time of circuit failure out of operation.
The recovery time of circuit failure out of operation is calculated according to formula (24).
[Hour/Time] (24)
5.2.5 Other indicators of the loop
5.2.6.1 N times repeated outage rate of loop.
The loop N repeated outage rate is calculated according to formula (25).
[Times/loop·year] (25)
5.2.6.2 Proportion of circuits without outage.
The proportion of circuits without outage is calculated according to formula (26).
[%] (26)
5.3 Dedicated indicators for transmission circuits
5.3.1 Availability factor of transmission circuit.
The available coefficient of the transmission circuit is calculated according to formula (27).
[%] (27)
5.3.2 Outage rate of transmission circuit.
The outage rate of the transmission circuit is calculated according to formula (28).
[Times/100 kilometers·year] (28)
5.3.2.1 Dispatching outage rate of transmission circuit.
The dispatching outage rate of the transmission circuit is calculated according to formula (29).
[Times/100 kilometers·year] (29)
5.3.2.2 The involved outage rate of the transmission circuit.
The involved outage rate of the transmission circuit is calculated according to formula (30).
[Times/100 kilometers·year] (30)
5.3.2.3 Planned outage rate of transmission circuit.
The planned outage rate of the transmission circuit is calculated according to formula (31).
[Times/100 kilometers·year] (31)
5.3.2.4 Failure outage rate of transmission circuit.
The failure rate of the transmission circuit is calculated according to formula (32).
[Times/100 kilometers·year] (32)
5.3.2.5 Instantaneous outage rate of transmission circuit.
The instantaneous outage rate of the transmission circuit is calculated according to formula (33).
[Times/100 kilometers·year] (33)
5.3.3 Outage time of transmission circuit.
The outage time of the transmission circuit is calculated according to formula (34).
[Hours] (34)
5.3.3.1 Dispatching outage time of transmission circuit.
The scheduled outage time of the transmission circuit is calculated according to formula (35).
[Hours] (35)
5.3.3.2 The involved outage time of the transmission circuit.
The involved outage time of the transmission circuit is calculated according to formula (36).
[Hours] (36)
5.3.3.3 The planned shutdown time of the transmission circuit.
The planned outage time of the transmission circuit is calculated according to formula (37).
[Hours] (37)
5.3.3.4 Outage time of transmission circuit failure.
The outage time of the transmission circuit fault is calculated according to formula (38).
[Hours] (38)
5.4 Comprehensive indicators of different types of loops
5.4.1 Comprehensive availability factor of loop.
The loop comprehensive available coefficient is calculated according to formula (39).
(39)
5.4.2 Comprehensive outage rate of loop.
The comprehensive outage rate of the loop is calculated according to formula (40).
[Times/Circuit·Year] (40)
5.4.2.1 Outage rate of loop comprehensive dispatch.
The outage rate of loop comprehensive dispatch is calculated according to formula (41).
[Times/Circuit·Year] (41)
5.4.2.2 Loop comprehensively affected outage rate.
The comprehensively affected outage rate of the loop is calculated according to formula (42).
[Times/Circuit·Year] (42)
5.4.2.3 The comprehensive planned outage rate of the loop.
The comprehensive planned outage rate of the loop is calculated according to formula (43).
[Times/Circuit·Year] (43)
5.4.2.4 Outage rate of integrated circuit failure.
The comprehensive fault outage rate of the loop is calculated according to formula (44).
[Times/Circuit·Year] (44)
5.4.3 Integrated circuit shutdown time.
The comprehensive outage time of the circuit is calculated according to formula (45).
[Hours] (45)
5.4.3.1 Integrated circuit outage time.
The outage time of loop comprehensive dispatch is calculated according to formula (46).
[Hours] (46)
5.4.3.2 Circuit comprehensively affected outage time.
The comprehensive involved outage time of the loop is calculated according to formula (47).
[Hours] (47)
5.4.3.3 Comprehensive planned shutdown time of the loop.
The comprehensive planned outage time of the loop is calculated according to formula (48).
[Hours] (48)
5.4.3.4 Integrated circuit failure shutdown time.
The comprehensive fault shutdown time of the loop is calculated according to formula (49).
[Hours] (49)
5.4.4 Recovery time of integrated circuit shutdown.
The comprehensive outage recovery time of the loop is calculated according to formula (50).
[Hour/time] (50)
5.4.4.1 Recovery time of integrated circuit outage.
The recovery time of integrated loop dispatching outage is calculated according to formula (51).
[Hour/Time] (51)
5.4.4.2 The recovery time of comprehensively affected outage of the circuit.
The recovery time of the comprehensively affected outage of the loop is calculated according to formula (52).
[Hour/Time] (52)
5.4.4.3 Recovery time of comprehensive planned outage of circuit.
The recovery time of the comprehensive planned outage of the loop is calculated according to formula (53).
[Hour/Time] (53)
5.4.4.4 The recovery time of integrated circuit failure shutdown.
The recovery time of the integrated circuit failure outage is calculated according to formula (54).
[Hour/Time] (54)
6 Statistical evaluation requirements
6.1 All transmission and transformation circuits with voltage levels of 110 (66) kV and above shall be subject to reliability statistics and evaluation, and report to the
Reliability basis and operating data of substation circuits.
6.2 The circuits with property rights of users and power plants shall also be included in the scope of reliability statistics of transmission and transformation circuits.
6.3 The registration and operation data of the power transmission and transformation circuit shall be divided according to the operation, maintenance and management relationship of the power transmission and transformation facilities contained therein.
Layer and hierarchical management.
6.4 See Table 1 to Table 6 for various loop codes, registration data and their association tables.
6.4.1 The same transmission and transformation circuit codes managed by different departments must be consistent, and the circuit codes shall be unified by the superior management department.
set.
6.4.2 As long as the circuit is directly connected to the grid of the unit, regardless of whether there are facilities managed by the unit in the circuit, the relevant unit should be registered.
Close the loop.
6.4.3 The loop will be included in the statistics from the date of commissioning. When the loop function disappears or the nature of the loop changes
meter.
6.5 The operating event statistics table and main index table of the loop are shown in Table 7-8.
6.5.1 The operating events of the loop should be recorded at any time in conjunction with work tickets, operation tickets and changes in the system operation mode, and should not be omitted.
6.5.2 Circuit outage caused by secondary systems such as circuit auxiliary facilities and relay protection, automatic devices, and telecontrol communication
, Should be included in the operation event of the transmission and transformation circuit.
6.6 Substation station power systems, reactive power compensation devices, filter devices, etc. are temporarily not included in the statistics of power transmission and transformation circuits.
6.7 The basic and operating data of the loop shall be filled in timely, accurately and completely.
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