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DL/T 1235-2019: (Guide for measurement and modeling of synchronous generator prime mover and its regulating system parameters)
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(Guide for measurement and modeling of synchronous generator prime mover and its regulating system parameters)
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Basic data | Standard ID | DL/T 1235-2019 (DL/T1235-2019) | | Description (Translated English) | (Guide for measurement and modeling of synchronous generator prime mover and its regulating system parameters) | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | K21 | | Word Count Estimation | 33,329 | | Date of Issue | 2019-06-04 | | Date of Implementation | 2019-10-01 | | Older Standard (superseded by this standard) | DL/T 1235-2013 | | Regulation (derived from) | Natural Resources Department Announcement No. 7 of 2019 | | Issuing agency(ies) | National Energy Administration | DL/T 1235-2019: (Guide for measurement and modeling of synchronous generator prime mover and its regulating system parameters)
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Guide for modeling and testing of generator's prime mover and governor Boiler refractory material for thermal power plant
ICS 29.160.30
K 21
People's Republic of China Electric Power Industry Standard
Replace DL/T 1235-2013
Synchronous generator prime mover and its regulating system
Parameter measurement and modeling guide
Refractory materials for boilers in thermal power plants
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Preface... Error No bookmark defined.
1 Scope...1
2 Normative references...1
3 Terms and definitions...1
4 Technical principles...4
5 Requirements for suppliers of prime movers and their regulating systems...5
6 Information and data that power generation companies should provide...6
7 Basic methods of model parameter measurement and identification...6
8 Regulation system model...6
9 Actuator model...10
10 Prime Mover Model...14
11 Prime mover and its regulation system modeling test items and requirements...18
12 The main content of the prime mover and its regulation system modeling report...20
Appendix A (Informative Appendix) Common Mathematical Models...22
Appendix B (Informative Appendix) Parameters to be Collected...26
Appendix C (Informative Appendix) Signals to be Collected...266
Foreword
This standard starts from the rules given in GB/T 1.1-2009 "Guidelines for Standardization Work Part 1.Standard Structure and Compilation"
grass.
This standard is an amendment to DL/T 1235-2013 "Guidelines for Measurement and Modeling of Synchronous Generator Prime Mover and Its Regulation System Parameters"
Order.
Compared with the previous edition, the main technical changes of this standard are as follows except for editorial changes.
- Added reference standards. GB/T 9652.1 and GB/T 11805 (see 2);
--Added "The model parameters of the prime mover of the hydroturbine unit should directly perform the actuator command step in the opening mode" (see
4.1.7);
--- Added "The gas turbine unit test should be carried out in the speed closed loop mode" (see 4.1.8);
--Added "For steam turbine units of gas-steam combined cycle generating units, if the regulating system is in normal operation,
If the door is fully open, no modeling test is required". (see 4.1.9);
--Added the relevant requirements of "the results of the prime mover and its regulation system modeling should be reviewed and stored" (see 4.10);
--Added "The refresh frequency of the output analog of the hydraulic turbine regulation system should be greater than 50Hz, and the electrical power should be PT, CT
The measured signal is calculated. ”Related requirements (see 5.2);
- Deleted the buffer link model in the turbine control system;
--Added the model of the main output limiting link (see 9.2.4), and modified the model of the turbine control system (see Figure A.9);
--- Increase the large and small step test requirements for the static test of the steam turbine actuator, "should be carried out above 20% of the valve opening"
(See 11.1.1);
--- Added Appendix C, the signals that need to be collected, listing typical steam turbine, water turbine and gas
The most basic signal required for measurement modeling.
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the National Grid Operation and Control Standardization Technical Committee (SAC/TC446).
Drafting organizations of this standard. State Grid Corporation of China National Electric Power Dispatching Control Center, China Electric Power Research Institute Co., Ltd., South China
Fang Power Grid Research Institute Co., Ltd., China Southern Power Grid Power Dispatching Control Center, North China Electric Power Research Institute Co., Ltd.
Ren company, State Grid Shaanxi Electric Power Research Institute, Yunnan Electric Power Research Institute (Group) Co., Ltd., State Grid Fujian
Provincial Electric Power Co., Ltd. Electric Power Research Institute, State Grid Zhejiang Electric Power Research Institute, Huadian Electric Power Research Institute
Power Research Institute Co., Ltd., Rundian Energy Science and Technology Co., Ltd., State Grid Hubei Electric Power Co., Ltd. Electric Power Research Institute, State Grid Hai
Municipal Electric Power Company Electric Power Research Institute, State Grid Ningxia Electric Power Co., Ltd. Electric Power Research Institute, State Grid Jiangsu Electric Power Co., Ltd.
Electric Power Research Institute, State Grid Shanxi Electric Power Research Institute, State Grid Henan Electric Power Research Institute,
Datang Hydropower Research Institute Co., Ltd.
The main drafters of this standard. Zhang Jianyun, Tao Xiangyu, Wang Guanhong, Wang Chao, Chen Gang, Zhang Jianxin, Yu Zhao, Huang Xing, Yu Dahai,
Ai Dongping, Li Zhiqiang, Ma Shijun, He Fengjun, Li Wenfeng, Xiao Yang, Huang Baohua, Qiu Xiaozhi, Li Hua, Zhang Jian, Wan Tianhu, Zhao
Yiyan, Wu Cheng, Su Yinsheng, He Changsheng, Dong Hongkui, Xu Zhenhua, Yang Jingping, Huang Daoshan, Gu Zhenghao, Xiong Hongtao, Ma Dangguo,
Tang Yaohua, Liang Zhengyu, Li Yanghai, Du Yang, Zhuo Guying, Liu Lei, Pu Jun, Xia Chao, Han Zhiyong, Wei Wei, Yang Chao, Ma Xiaoguang,
Zhou Cheng, Li Ying, Wang Maoqing, Xu Ke, Ding Zhenyu, Guo Qiang, Guo Hui, Zhang Xinhua, Zi Peng, Cai Dongyang.
This standard was first published in.2013 and revised for the first time in.2018.
This standard will replace DL/T 1235-2013 after its release and implementation.
The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of the China Electricity Council (Beijing Baiguang
Lu Er Tiao No. 1, 100761).
Parameter measurement and modeling guide for the prime mover of synchronous generator and its regulating system
1 Scope
This standard specifies the prime mover and its regulating system model and parameter implementation of the synchronous generator set for power system stability analysis and calculation.
Measurement and modeling methods.
This standard is applicable to the prime mover, energy supply system and energy supply system of steam turbine generator sets, hydraulic turbine generator sets and gas generator sets.
Adjust the actual measurement and modeling of system parameters, and put forward requirements for relevant departments involved in parameter measurement and modeling. Other types of power generation
The unit can be implemented by reference.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version is suitable
Used in this document. For undated references, the latest version (including all amendments) applies to this document.
GB/T 9652.1 Technical conditions of hydraulic turbine control system
GB/T 11805 Automatic components (devices) of hydraulic turbine generator sets and basic technical conditions of their systems
GB/T 14100 Gas Turbine Acceptance Test
DL/T 496 Hydro-turbine electro-hydraulic control system and device adjustment test guide
DL/T 824 Guidelines for Performance Acceptance of Steam Turbine Electro-hydraulic Control System
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Governing system
A control system that controls the operation of the prime mover.
3.2
Actuator
Accept the instructions of the prime mover adjustment system to control the electric-hydraulic system or mechanical-hydraulic system of valves, guide vanes (paddles), etc.
压系统。 Pressure system.
3.3
Prime mover and energy supply system prime mover and energy supply system
Steam turbines and their boilers, water turbines and their water diversion systems, compressors and gas turbines that provide mechanical torque for generators
Set.
3.4
Static test
A test conducted on a generator set in a shutdown state.
3.5
Load test
A test conducted on a generator set under grid-connected conditions.
3.6
Step test
A step change test of the set value of the controlled quantity.
3.7
Step value
In the step test, the difference between the final steady-state value of the controlled quantity and the initial value is shown in Figure 1 as 1 0U U−.
3.8
PM overshoot
In the step test, the percentage of the ratio of the difference between the maximum value of the controlled quantity and the final steady-state value to the step quantity, as shown in Figure 1.
3.10
Dt delay time
In the step test, the time required from the time the step signal is added to when the controlled quantity changes to 10% of the step quantity is shown in Figure 1.
3.11
Upt rise time
In the step test, the time required from the addition of the step amount to the time the controlled amount changes to 90% of the step amount is shown in Figure 1.
3.12
Pt peak time
In the step test, the time from the time the step quantity is added to the controlled quantity reaches the maximum value is shown in Figure 1.
3.13
St settling time
The shortest time from the start time to the absolute value of the difference between the controlled quantity and the final steady-state value does not exceed 5% of the step quantity,
As shown in Figure 1.
3.14
N number of oscillation
The number of oscillations of the controlled quantity during the adjustment time (Figure 1).
3.15
Frequency-domain measuring
Add sine signals or noise signals of different frequencies to the input end, measure the frequency response characteristics of the output end to the input end, and take
A method to identify the model and its parameters using direct comparison of amplitude-frequency and phase-frequency characteristics or curve fitting techniques.
3.16
Time-domain measuring
Add a disturbance signal at the input, generally a step signal, measure the time domain response characteristics of the output, and analyze the structure of the link
The method to identify the model and its parameters by comparing the simulated time-domain response characteristic curve with the measured results.
3.17
RPP hydro turbine reverse peak power
In the step test of the turbine, the difference between the initial power and the maximum reverse power is shown in Figure 2.
3.18
RPT hydro turbine reverse peak time
In the hydraulic turbine frequency step test, the time required from the step amount to when the reverse power reaches the maximum value is shown in Figure 2.
3.19
HPP maximum power increment of steam turbine high
pressure cylinder
In the steam turbine step test, the maximum value reached during the rapid power change minus the initial power value is shown in Figure 3.
3.20
HPT steam turbine high pressure cylinder peak time
In the steam turbine step test, the time required from the step amount to when the power reaches the maximum output increment of the high pressure cylinder, as shown in Figure 3.
Shown.
3.21
Valve control mode
Specify the steam turbine control mode of the valve opening.
3.22
Guide-valve control mode
The turbine control mode that feeds back the guide vane opening per unit value.
3.23
Power control mode
The turbine control mode with feedback power per unit value.
Figure 1 Example curve of step response characteristic
Figure 2 Example curve of step response of hydraulic turbine
Figure 3 Example curve of step response of steam turbine
4 Technical principles
4.1 The basic requirements for the actual measurement of the prime mover and its regulation system parameters.
4.1.1 The control system, the actuator and the prime mover should be modeled, tested and identified separately.
4.1.2 The closed-loop control mode of the prime mover and its regulating system (such as. steam turbine load closed-loop, coordinated control, hydraulic turbine
Group power closed-loop, monitoring closed-loop, etc.) test, as the basis for evaluating the correctness of the prime mover and its regulation system model parameters.
4.1.3 Regardless of the discreteness in the modeled object, consider its discrete control system as a continuous control system.
4.1.4 The actual measurement modeling of the regulating system and actuator should be carried out in the static test.
4.1.5 The actual measurement and modeling of the prime mover shall be carried out in the load test. The test conditions shall include typical work conditions of 80% rated load and above.
condition.
4.1.6 The actual measurement of the model parameters of the prime mover of the steam turbine unit should be carried out in the valve control mode.
4.1.7 The model parameters of the prime mover of the hydraulic turbine unit should be in the opening mode, and the actuator command step should be directly performed.
4.1.8 The test of the gas turbine unit should be carried out in the speed closed loop mode.
4.1.9 For the steam turbine unit of a gas-steam combined cycle generator set, if its regulating system keeps the regulating valve fully open during normal operation,
No modeling experiment is required.
4.1.10 The identification results of the model parameters of the regulating system, the actuator, the prime mover, etc. shall be verified separately, and the simulation results shall be compared with the actual
The error of the test result should meet the requirements of Chapter 11 of this standard.
4.1.11 Frequency domain measurement method or time domain measurement method can be adopted according to the actual situation.
4.1.12 Under conditions, the actual grid frequency disturbance curve can be used as input, and the primary frequency modulation response characteristics of the unit can be used as input.
Verify the accuracy of model parameters.
4.1.13 The errors caused by measuring equipment and measuring methods shall be fully taken into account when modeling, and necessary corrections shall be made.
4.2 The prime mover and its adjustment system components should meet the requirements of national standards and industry standards; the static test should be completed after the adjustment system acceptance
(Meet the requirements of GB/T 9652.1, GB/T 11805, GB/T 14100, DL/T 496, DL/T 824, respectively);
The test should be carried out after a frequency modulation test is qualified.
4.3 The various coefficients of the prime mover and its regulating system model are expressed in units of per unit value, and the unit of time constant is second.
4.4 Modification, overhaul, software upgrade, parameter modification, etc. of the modeled prime mover and its adjustment system components should be retested.
4.5 The test equipment meets the measurement requirements, and the measured waveforms should be able to meet the requirements of later analysis and processing.
4.6 The measured model parameters of the prime mover and its regulation system should be calculated through the power system special calculation program (such as PSD-BPA, PSASP
Other procedures) verification, the error between the simulation results and the measured results should meet the requirements of Chapter 11 of this standard.
4.7 When a model that meets the requirements cannot be selected in the special calculation program for the power system (see Appendix A), calculate on request
Program providers add new models, or use program user-defined functions to create new models.
4.8 The modeling report shall provide the selection results and model parameters of the prime mover and its regulation system model for power system stability calculation.
And provide the comparison result of the simulation curve and the measured curve, give the error index, the error standard should meet the requirements of Chapter 11 of this standard.
4.9 The completion of the actual test of the prime mover and its regulation system exceeds five years. A recheck test shall be carried out. The test items shall be
Load test specified in Chapter 11.And compare the measured results with the simulation results. When the simulation error meets the requirements, there is no need
Re-modeling; if the requirements are not met, the modeling work shall be restarted until the simulation error meets the requirements of Chapter 11 of this standard.
4.10 The modeling results of the prime mover and its regulation system should be reviewed and checked in.
4.10.1 The audit content includes. test items, test data, identification process, and simulation results.
4.10.2 Incoming check includes. non-disturbance simulation check and frequency disturbance simulation check.
4.10.3 Non-disturbance simulation check method. replace the tested unit speed control model with actual measured model parameters in the actual data of the power grid,
Perform non-disturbance simulation, and the maximum fluctuation of the calculated power angle curve of the unit does not exceed 0.6 ± .
4.10.4 Frequency disturbance simulation check method. based on the basic data of no disturbance simulation check, the frequency disturbance in the modeling report
The test is simulated, and the error between the simulation result and the actual measurement result of the unit power should meet the relevant requirements of Chapter 11 of this standard.
4.10.5 After completing the audit work and warehousing check, the modeling results of the prime mover and its regulation system are ready to enter the power grid simulation calculation
The conditions of the parameter library.
5 Requirements for suppliers of prime movers and their regulating systems
5.1 The adjustment system should meet the requirements of GB/T 9652.1, GB/T 11805, GB/T 14100, DL/T 496, DL/T 824,
The mathematical model parameters and technical data of the adjustment system and each additional link shall be provided, and the procedures involved in the calculation and test measurement shall be marked
Non-linear and logical control links such as pure delay.
5.2 The adjustment system should have the interface required by the third party for model parameter testing, and can input analog signals for testing.
Test, the refresh frequency of the analog output of the steam turbine regulation system should be greater than 10Hz; the refresh frequency of the analog output of the hydraulic turbine regulation system
The rate should be greater than 50Hz, and the electrical power should be calculated using PT and CT measurement signals.
5.3 The setting value of the adjustment system should be expressed in decimal, the time constant is expressed in seconds, and the magnification is expressed in per unit value.
The method of determining the standard value of the unit value.
6 Information and data that power generation companies should provide
6.1 The tested party shall provide the manufacturer, model, control method and control logic of the prime mover and its regulating system.
Instruction cycle.
6.2 Thermal calculations for thermal power plants, adjustment and maintenance calculations for hydraulic turbine units, adjustment system debugging, acceptance or optimization test reports,
Load test report.
6.3 Control parameters of the actuator (see Appendix B).
6.4 Parameters of steam turbine/water turbine/gas turbine (see Appendix B).
6.5 The manufacturer, model, rated capacity and design parameters of the boiler.
6.6 The main logic of the coordinated control (CCS) of thermal power plants and the closed-loop control logic of monitoring power of hydropower plants.
7 Basic methods of model parameter measurement and identification
7.1 According to the transfer function block diagram of the field device, the model of each part can be determined, and its parameters can be measured on this basis. According to the model
According to the specific situation of the model, the input/output characteristics of each link are graded and tested, and the unknown is obtained according to the measurement results and the predetermined model
parameter.
7.2 Frequency domain measurement method
7.2.1 For the first-order link, the measurement results of the frequency response characteristics can be used to directly calculate the parameters.
7.2.2 For non-first-order links, since the model structure and some parameters are generally known, parameter fitting techniques or
The frequency response characteristics of the model are compared with the measured frequency response characteristics to determine the parameters of the model.
7.2.3 The frequency range of the measurement should be selected according to the characteristics of the research object.
7.3 Time domain measurement method
7.3.1 For the first-order link, the parameters can be directly calculated using the measurement results of the time domain response characteristics.
7.3.2 For non-first-order links, the time-domain parameter identification method can be used, or the simulated response and measured response of the comparison model can be used
Method to determine the link parameters.
8 Regulation system model
8.1 Steam turbine governing system model
8.1.1 The regulation system of a thermal power plant includes a governor that controls a steam turbine and a coordinated control system (CCS).
8.1.2 Measurement link
The measurement links of speed, power, pressure, etc. of the adjustment system are described by the first-order inertia link as shown in Figure 4.RT in the figure is the test
Measure the time constant of the link. The input signal is the measured (speed, power, pressure), and the output signal is the measurement result.
8.1.3 PID link
The PID link of the regulation system is a parallel type as shown in Figure 5.In the figure, PK is proportional magnification, DK is differential magnification
IK is the integral magnification. MAXINT and MININT are the upper limit and lower limit of the integral output. Input signal is control bias
Difference, the output signal is a control command.
8.1.5 Dead link
The dead zone link is represented by the model in Figure 7, where 1DB is the positive direction dead zone, and 2DB is the negative direction dead zone.
8.1.6 Speed unequal rate link
The unequal speed link is described by the model shown in Figure 8, where δ is the unequal speed. The input signal is the speed deviation
The standard unit value, the output signal is the standard unit value of the power deviation.
8.1.7 Pure delay link
8.1.8 Logic Control
When the control system includes different control methods or different control parameters switching (such as cutting off the power closed loop when the power deviation is large),
Should be reflected in the model.
8.2 Turbine Regulating System
8.2.1 The turbine regulating system includes the governor and monitoring system (including the unit LCU, upper computer and other equipment) that control the turbine.
8.2.2 Measurement link
The measurement links such as speed and power of the regulation system are described by the first-order inertia link as shown in Figure 10.RT in the figure is the measurement link
Time constant. The input signal is the measured (speed, power, pressure), and the output signal is the measurement result.
8.2.3 Parallel PID link
The PID link of the regulation system is generally parallel as shown in Figure 11.In the figure, PK is the proportional gain; IK is the integral gain;
DK is the differential gain; VT1 is the time constant of the differential link. MAXINT and MININT are the upper limit and lower limit of the integral output.
The input signal is the control deviation value, and the output signal is the control command.
8.2.4 Dead zone link
The dead zone link is described by the model in Figure 12, where 1DB is the positive direction dead zone, and 2DB is the negative direction dead zone.
8.2.5 Limiting link
The limiting link is described by the model in Figure 13, where MAX is the upper limit and MIN is the lower limit.
8.2.6 Permanent slip coefficient
The permanent slip coefficient can be described by the model in Fig. 14.In the opening mode, it is the relative relationship between the frequency and the stroke of the servomotor.
Said. The input signal is the per-unit value of the opening deviation, and the output signal is the per-unit value of the speed deviation.
8.2.7 Adjustment rate
The reciprocal of the power change and the frequency change, expressed with. The input signal is the standard unit value of the power deviation, and the output signal is
The per-unit value of the speed deviation.
8.2.8 Pure delay link
The pure delay link in the control system can be described by the model shown in Figure 16.In the figure, T is the pure delay time.
8.2.9 Logic Control
When the control system includes different control methods or different control parameters switching, it should be reflected in the model.
8.3 Gas turbine control system model
8.3.1 The gas turbine regulation system has speed regulation and power regulation.
8.3.2 Measurement link
The measurement links such as speed and power of the adjustment system are described in the fir...
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