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DL/T 793.4-2019: (Power plant reliability assessment procedures - Part 4: Pumped storage units)
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DL/T 793.4-2019
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Basic data | Standard ID | DL/T 793.4-2019 (DL/T793.4-2019) | | Description (Translated English) | (Power plant reliability assessment procedures - Part 4: Pumped storage units) | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | F11 | | Word Count Estimation | 28,239 | | 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 793.4-2019: (Power plant reliability assessment procedures - Part 4: Pumped storage units)---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.
Reliability evaluation code for generating equipment-Part 4.Pumped-storage units
DL/T 996-2019
ICS 27.140
F 23
People's Republic of China Electric Power Industry Standard
Reliability Evaluation Regulation of Power Generation Equipment
Part 4.Pumped Storage Unit
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Foreword...II
1 Scope...3
2 Normative references...3
3 Terms and definitions...3
4 Status division...10
5 Evaluation Index...10
6 Scope of Statistical Evaluation...15
7 Management requirements...15
Appendix A (informative appendix) Chinese and English comparison table of reliability status of pumped storage units...21
Appendix B (informative appendix) Chinese and English comparison table of reliability index of pumped storage unit...22
References...24
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".
This standard specifies the corresponding technical requirements and methods for the reliability statistics, analysis and evaluation of pumped storage units. DL/T 793 "Power Generation
"Equipment Reliability Evaluation Regulations" is a series of standards, divided into seven parts, of which the published standards are.
--Part 1.General rules;
--Part 2.Coal-fired units;
--Part 5.Gas turbine generator set.
This standard is part 4 of DL/T 793.
This standard is compiled in accordance with the relevant content of the "Reliability Evaluation Regulations for Power Generation Equipment Part 1.General Principles". Therefore, there is no
For the definitions or provisions of general terms and evaluation indicators, indicators not in Appendix A and Appendix B, please refer to "Reliability Evaluation of Power Generation Equipment
Regulation Part 1.General Rules.
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the Power Industry Reliability Management Standardization Technical Committee.
Drafting organizations of this standard. China Electricity Council, State Grid Xinyuan Holdings Co., Ltd.
The main drafters of this standard. Zhang Yawu, Zhou Xia, Zhang Quansheng, Chang Yuhong, Zhou Hong, Wang Jikang, Hu Yumei, Li Jianfeng, Li Jianguang, Song Xiang
Hui Yuan Bingfeng Lin Wenfeng Luo Tao Yu Shan Sun Xuwei
The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of the China Electricity Council (No. 1 Baiguang Road,
100761).
Reliability Evaluation Regulation of Power Generation Equipment Part 4.Pumped Storage Unit
1 Scope
This section specifies the statistical scope, evaluation indicators and evaluation methods for the reliability of pumped storage units.
This section applies to the reliability evaluation of pumped storage units.
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 36550-2018 Basic Terminology for Pumped Storage Power Station
3 Terms and definitions
3.1
Reliability for generating equipment
The ability of power generation equipment to perform specified functions under specified conditions and within specified time intervals.
3.2
Gross maximum capacity (GMC)
The maximum capacity that the unit can continuously carry in a given period. Generally, the rated capacity of the unit can be used.
3.3
Rated capacity (RC)
The output/input power of a generator motor running under specified conditions. Power generation conditions refer to the output electric power, expressed in MVA value; electric
Working condition refers to the output shaft mechanical power, expressed in MW value. The rated capacity of the pumped storage unit can generally be the unit’s nameplate rated capacity (INC).
3.4
Gross actual generation (GAG)
The actual amount of electricity generated by the unit in a given period.
3.5
Gross maximum generation (GMG)
The amount of electricity generated by the unit continuously operating at the maximum gross capacity during a given period.
3.6
Unit derated capacity (UNDC)
The difference between the actual maximum continuous output and the gross maximum capacity or the rated capacity of the unit when the unit is in a reduced output state. Its number
3.7
Generating capacity (GC)
The electric energy produced by the unit in a certain period of time. (Quoted from GB/T 36550-2018).
3.8
Pumping capacity (PC)
The electricity consumed by the unit for pumping water in a certain period of time. (Quoted from GB/T 36550-2018)
3.9
Pump-turbine
It can be used as a hydraulic machine that can operate as a pump or as a turbine. (Quoted from GB/T 36550-2018)
3.10
Generator-motor
A rotating electric machine that can be used as a generator and a motor. (Quoted from GB/T 36550-2018)
3.11
Static frequency converter
Static frequency conversion equipment with a certain power composed of converter devices and DC reactors, generally consists of frequency conversion units, output
It is composed of input/output unit, control protection unit and cooling unit. (Quoted from GB/T 36550-2018)
3.12
Synergic system
Public oil, water, gas systems, plant power systems, metal structures, DC systems, static frequency conversion starting systems, water pipelines, reservoirs, etc.,
Equipment or systems that are unavailable for two or more units of the pumped storage power station due to its outage.
3.13
Operating mode
The operating status of the unit. (Quoted from GB/T 36550-2018)
3.13.1
DL/T 973.4-2019
Stop mode
The unit is in a static shutdown state. (Quoted from GB/T 36550-2018)
3.13.2
Generator mode
The water is discharged from the upper reservoir to the lower reservoir, driving the water pump and turbine runner of the unit to rotate to convert the water potential energy into electrical energy. (lead
From GB/T 36550-2018)
3.13.3
Generator condenser mode
After the water is compressed in the runner chamber, the runner rotates in the air, and the unit is connected to the grid for power generation. (Quoted from GB/T 36550-2018)
3.13.4
Pump mode
The unit pumps water from the lower reservoir to the upper reservoir and converts electrical energy into water potential energy. (Quoted from GB/T 36550-2018)
3.13.5
Pump condenser mode
After the runner chamber presses water, the runner rotates in the air, and the unit is connected to the grid in the pumping direction. (Quoted from GB/T 36550-2018)
3.13.6
Luncher mode
The unit starts in a back-to-back manner, and the tractor runs in the direction of power generation and provides variable frequency current. The tractor will be pulled to the rated speed and connected to the grid
A working condition. (Quoted from GB/T 36550-2018)
3.14
Mode transition
The process of a unit from one working condition to another. (Quoted from GB/T 36550-2018)
3.15
Static frequency converter startup
The start mode that uses the static frequency conversion device to drive the unit in the pumping direction through the start circuit. (Quoted from GB/T 36550-2018)
3.16
Back to back startup
One unit is started in the driving mode, and the other unit is driven to start in the pumping direction through the start loop. (quoted
GB/T 36550-2018)
3.17
DL/T 973.4-2019
Regular maintenance
For units with frequent startups and shutdowns and no scheduled maintenance and shutdown plans in the current month, according to the needs of the power station and system operation conditions, monthly dispatch approval
Scheduled unit inspections.
3.18
Active (ACT)
The equipment is in a state for statistical evaluation. The use status is divided into available and unavailable.
3.18.1
Available (A)
The equipment is in a state capable of performing predetermined functions, regardless of whether it is running or not, and regardless of how much power it can provide. Available status
Including running and standby.
3.18.1.1
Run in service(S)
For equipment, it refers to the state of the generator, tuned camera or motor being electrically connected to the power system (including trial operation),
It can be operated at full output, planned or unplanned to reduce output.
3.18.1.2
Reserve reserve shutdown (RS)
The device is in a usable but not running state.
3.18.1.3
Unit derating
The unit cannot reach the state of maximum gross capacity operation (excluding normal output adjustment according to the load curve). Unit reduction in output can be divided into plans
Reduced output and unplanned reduction of output.
a) planned derating
The crew reduced their output during the scheduled period as planned.
b) unplanned derating
Unpredictable unit reduced output.
3.18.2
Unavailable (U)
The equipment is in an inoperable or standby state for whatever reason. The unavailable state is divided into planned outage and unplanned outage.
3.18.2.1
Planned outage (PO)
The unit is in the state of the planned maintenance period (including inspection, test, technical transformation, or maintenance, etc. and is in an unusable state).
The planned shutdown should be scheduled in advance with a set deadline. The planned outage is divided into A-level, B-level, C-level, and D-level maintenance and monthly scheduled inspections.
3.18.2.2
Unplanned outage (UO)
The equipment is in an unavailable state and is not planned to be out of service. Unplanned outages are divided into the following five categories according to the urgency and impact of the outage.
3.19
Disable inactive (IACT)
In accordance with the relevant national policies, the unit is in a state of being shut down for storage or being out of service after long-term modification approved by the prescribed department, referred to as the out of service state.
The time when the crew is in the disabled state does not participate in the statistical evaluation.
3.20
Time
3.20.1
Service hours (SH)
The number of hours the equipment is in operation can be divided into the following 5 categories according to the operation state.
3.20.2
Equivalent unit derated hours (EUNDH)
The operating hours of the unit with reduced output are converted into outage hours calculated according to the unit's rated capacity. Formulated as
3.20.5
Unplanned outage hours (UOH)
The number of hours that the equipment is in an unplanned shutdown state is classified into the following 5 categories according to the status definition.
a) No.1 unplanned outage hours (UOH1)
The number of hours the unit has been in Class 1 unplanned outage.
b) No. 2 unplanned outage hours (UOH2)
The number of hours the unit has been in Class 2 unplanned outage.
c) No.3 unplanned outage hours (UOH3)
The number of hours the unit was in Category 3 unplanned outage.
d) No.4 unplanned outage hours (UOH4)
The number of hours the unit was in Category 4 unplanned outage.
e) No.5 unplanned outage hours (UOH5)
The number of hours that the unit was in Category 5 unplanned outage.
The unplanned outage time is the sum of various unplanned outage hours of the unit during the statistical period, expressed as
3.20.6
Forced outage hours (FOH)
The sum of the hours that the equipment is in the unplanned outage state of category 1～3, expressed as
3.20.7
Period hours (PH)
The number of calendar hours the device is in use.
3.20.8
Available hours (AH)
The number of hours the device is available.
Available hours is equal to the sum of operating hours and standby hours, expressed as
3.20.9
Unavailable hours (UH)
The number of hours the device has been unavailable. The unavailable hours are equal to the sum of planned and unplanned outage hours or the hours and available hours during the statistical period.
The difference in hours is expressed as
3.20.10
Unit year (UY)
The number of hours in the statistical period of one device or the sum of the number of hours in the statistical period of multiple devices divided by the calendar hours of the year.
3.20.11
4 state division
The unit status division is shown in Figure 1, and the English comparison is shown in Appendix A.
Figure 1 The status division of the unit
5 Evaluation Index
5.1 Refer to Appendix B for the Chinese and English comparison table of reliability index of power generation equipment.
5.2 Single machine evaluation index
5.2.1 Planned Outage Factor (POF)
5.2.2 Unplanned Outage Factor (UOF)
The unplanned outage coefficient is the percentage of unplanned outage hours (UOH) to hours (PH) during the statistical period, expressed as
5.2.3 Forced outage factor (FOF)
The forced outage coefficient is the percentage of forced outage hours (FOH) to hours (PH) during the statistical period, expressed as
5.2.4 Forced outage rate (FOR)
Forced outage rate is the percentage of forced outage hours (FOH) to the sum of operating hours (SH), expressed as
(18)
5.2.5 Equivalent Forced Outage Rate (EFOR)
The equivalent forced outage rate is the sum of forced outage hours (FOH) and reduced output equivalent outage hours (EUNDH) and operating hours (SH)
The percentage of the sum, expressed as
(19)
5.2.6 Occurrence rate of forced outage (FOOR) (times/year)
The occurrence rate of forced outages is the ratio of the product of the number of forced outages (FOT) and calendar hours (CH) to available hours (AH), using the formula table
Shown as
(20)
5.2.7 Exposure Rate (EXR)
5.2.8 Availability factor (AF)
5.2.9 Operating factor (SF)
5.2.10 Utilization factor (UTF)
5.2.11 Output coefficient (OF)
The output coefficient is the percentage of power generation (GC) to the product of rated capacity (RC) and power generation hours (GH), expressed as
(25)
5.2.12 Reduced output coefficient (UDF)
Reduced output coefficient is the percentage of reduced output equivalent outage hours (EUNDH) to hours (PH) during the statistical period. Formulated as
5.2.13 Equivalent Availability Factor (EAF)
The equivalent availability factor is the difference between available hours (AH) and reduced output equivalent outage hours (EUNDH) in the statistical period hours (PH)
percentage.
5.2.14 Unplanned Outage Rate (UOR)
The unplanned outage rate is the percentage of unplanned outage hours (UOH) to the sum of operating hours (SH), expressed as
5.2.15 Average Continuous Available Hours (CAH)
Average continuous available hours is the average interval time between unit outage events in available hours (AH), expressed as
5.2.16 Power generation start success rate (GSR)
The success rate of power generation startup is the percentage of the number of successful startups in the power generation direction (GSST) to the total number of startups in the power generation direction, expressed as
(30)
5.2.17 Pumping start success rate (PSR)
The pumping start success rate is the percentage of the number of successful pumping starts (PSST) in the total number of pumping starts, expressed as
(31)
5.2.18 Average planned outage interval (MTTPO)
The average planned outage interval is the ratio of operating hours (SH) to planned outage times (POT), expressed as
5.2.19 Average time between unplanned outages (MTTUO)
The average unplanned outage interval is the ratio of operating hours (SH) to the number of unplanned outages (UOT), expressed as
5.2.20 Average planned outage hours (MPOD)
The average planned outage hour is the average duration of the planned outage event, expressed by the formula as the planned outage hour (POH) and the planned outage
The ratio of the number of operations (POT)
5.2.21 Average Unplanned Outage Hours (MUOD)
The average unplanned outage hour is the average duration of the unplanned outage event, expressed by the formula as unplanned outage hours (UOH) and
Ratio of unplanned outages (UOT)
5.2.22 Mean start interval hour (MTBS)
The average start interval hour is the operating hours (SH) divided by the number of successful starts (SST), expressed in public hours as
5.3 Evaluation indicators for multiple units
5.3.1 Weighted average planned outage factor (WPOF)
The sum of the product of each unit’s gross maximum capacity (GMC) and planned outage hours (POH) accounts for each unit’s gross maximum capacity (GMC) and the statistical period
The percentage of the sum of the product of time hours (PH), expressed as
5.3.2 Weighted average unplanned outage factor (WUOF)
The sum of the product of the gross maximum capacity (GMC) of each unit and the unplanned outage hours (UOH) accounts for the gross maximum capacity (GMC) of each unit and statistics
The percentage of the sum of the hour (PH) products of the period, expressed as
5.3.3 Weighted average availability factor (WAF)
The sum of the product of each unit’s gross maximum capacity (GMC) and available hours (AH) accounts for the total gross capacity (GMC) of each unit and the hours during the statistical period
(PH) The percentage of the sum of products, expressed as
5.3.4 Weighted average operating factor (WSF)
The sum of the product of the gross maximum capacity (GMC) and operating hours (SH) of each unit accounts for the gross maximum capacity (GMC) of each unit and the hours of the statistical period
(PH) The percentage of the sum of products, expressed as
5.3.5 Weighted average utilization factor (WUTF)
The sum of the product of each unit’s gross maximum capacity (GMC) and utilization hours (UTH) accounts for the total gross capacity (GMC)
The percentage of the sum of time (PH) products, expressed as
5.3.6 Weighted average output factor (WOF)
The percentage of the sum of the actual power generation (GC) of each unit to the sum of the product of the rated capacity (RC) and power generation hours (GH) of each unit, expressed in public
The formula is expressed as
(42)
5.3.7 Weighted average unit reduction output coefficient (WUDF)
The sum of the product of the gross maximum capacity (GMC) of each unit and the equivalent outage hours of reduced output (EUNDH) accounts for the gross maximum capacity (GMC) of each unit
Percentage of the sum of the product of hours (PH) during the statistical period,
5.3.8 Weighted average equivalent availability factor (WEAF)
The sum of the gross maximum capacity (GMC) of each unit multiplied by the available hours (AH) and the equivalent outage hours of reduced output (EUNDH) accounts for each
The percentage of gross maximum capacity (GMC) multiplied by the sum of hours (PH) during the statistical period, expressed as
5.3.9 Weighted average unplanned outage rate (WUOR)
The sum of the product of each unit’s gross maximum capacity (GMC) and unplanned outage hours (UOH) accounts for the sum of the gross maximum capacity (GMC) of each unit
The percentage of the sum of the sum of UOH and SH, expressed as
5.3.10 Weighted average exposure rate (WEXR)
The sum of the product of the gross maximum capacity (GMC) and operating hours (SH) of each unit accounts for the gross maximum capacity (GMC) and available hours (AH) of each unit
The percentage of the sum of products, expressed as
5.3.11 Power generation start success rate (GSR)
The percentage of the sum of the number of successful start-up times (GSST) in the power generation direction of multiple units in the total number of start-up times in the power generation direction, expressed as
(47)
5.3.12 Pumping start success rate (PSR)
The percentage of the sum of the number of successful pumping direction starts (PSST) of multiple units in the total number of pumping direction starts, expressed as
(48)
6 Scope of statistical evaluation
Unit statistics include water pump turbines, generator motors, main transformers (including high-voltage outlet bushings) and their corresponding accessories and auxiliary
Auxiliary system, exclusive hydraulic equipment and facilities for the unit.
7 Management requirements
7.1 Basic data registration
7.1.1 All units shall be registered according to the specified code and serial number.
7.1.2 The registration content of the crew shall be carried out according to the requirements of Table 1 to Table 4.
7.1.3 Each unit (including related equipment) is represented by a set of 7-character codes. In the unit code, the unit number refers to the unit
7.1.4 Before the first unit is put into production, relevant basic data should be reported to the power reliability management agency and an enterprise code should be applied.
7.2 Time recording
7.2.1 The start and end time recording of the equipment status adopts a 24h system. 00.00 is the beginning of the day, and 24.00 is the end of the day.
7.2.2 The start and end time of equipment status changes are subject to the approval time of dispatching departments at all levels.
7.2.3 The statistical evaluation of the reliability of newly-built units starts from the date of handover.
7.3 State transition time boundary
7.3.1 Conversion of operation to standby, planned outage or unplanned outage. the time when the generator motor is disconnected is the boundary.
7.3.2 Standby, planned outage or unplanned outage is operation. the time when the generator motor is connected to the grid is the boundary.
7.3.3 Planned outage or unplanned outage is used as a backup. the time when the retaliatory service is delivered and dispatched is the boundary.
7.3.4 Planned outages are classified as category 5 unplanned outages. bounded by the end time of outages approved by the dispatching department.
7.3.5 Standby or unplanned outages are planned outages. bounded by the time approved by the dispatching department.
7.3.6 Power generation phase modulation is converted to power generation, power generation is converted to power generation phase modulation, water pumping phase modulation is converted to pumping, water pumping is converted to pumping phase modulation, and water pumping is converted to power generation.
Electricity. bounded by the time to reach the target operating condition.
7.3.7 Standby or transfer from operation to category 4 unplanned outage. the time of unit outage approved by the dispatching department is the boundary.
7.4 Unit status
7.4.1 Start
7.4.1.1 Start-up includes power generation start-up and pumping start-up. The power generation start-up is the transition of the unit from shutdown conditions to power generation and power generation phase modulation conditions.
Cheng. Pumping start is the process of the unit from shutdown conditions to pumping, pumping and phase adjustment conditions.
7.4.1.2 The startup results are divided into.
a) Successful startup. After the start-up procedure is executed, the unit will be transferred from the shutdown condition to the dispatching condition.
b) Startup failed. After the start-up procedure was executed, the unit was not transferred from the shutdown condition to the dispatching condition.
7.4.1.3 The unit needs to go through intermediate operating conditions from shutdown conditions to target operating conditions. As long as the target operating conditions are not reached, they are recorded as start-up according to regulations.
failure.
7.4.1.4 When the start-up procedure is repeated several times without any overhaul to eliminate defects, it is counted as one start.
7.4.1.5 The pumping start of the unit shall record the starting method and starting equipment.
7.4.2 Operation
7.4.2.1 All unit operation events shall be truthfully recorded, including power generation, power generation phase modulation, pumping, and pumping phase modulation.
7.4.2.2 Under the power grid dispatching command, the operating state of the unit in spinning reserve is recorded as generating operation.
7.4.2.3 The abnormal events of start-up and working condition transition tests conducted during unit maintenance (planned or unplanned) are only recorded and not counted.
7.4.3 Spare
7.4.3.1 The unit is in shutdown conditions and can be started at any time according to the dispatching instructions, and recorded as a standby state.
7.4.3.2 When the unit cannot be operated due to external reasons such as reservoir restrictions, transmission line restrictions, power system failure, natural disasters, etc.,
And when the unit is approved for scientific testing and needs to be shut down, the unit is regarded as a backup.
7.4.3.3 During the standby period, the unit can handle defects and start operation at any time according to the dispatching instruction, and the unit is regarded as standby.
7.4.3.4 In the standby state of the unit, a single working condition is unavailable, and the grid dispatching is not affected. The unit is regarded as standby in principle; the grid is affected
Normally scheduled events are recorded as unavailable events according to regulations.
7.4...
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