DL/T 2033-2019 English PDF

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DL/T 2033-2019: Test methods for power unit of high voltage variable frequency drive used in fossil-fuel power plants
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Basic data

Standard ID: DL/T 2033-2019 (DL/T2033-2019)
Description (Translated English): Test methods for power unit of high voltage variable frequency drive used in fossil-fuel power plants
Sector / Industry: Electricity & Power Industry Standard (Recommended)
Classification of Chinese Standard: F23
Classification of International Standard: 27.100
Word Count Estimation: 19,146
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
Summary: This standard specifies the test conditions, test items, parameter verification, performance test and other requirements for the power unit of the high-voltage frequency converter used in thermal power plants. This standard is applicable to power unit tests of high-voltage inverters in thermal power plants with rated input voltages of AC 6kV and 10kV, rated input frequencies of 50Hz or 60Hz, output voltages not greater than 10kV, and output frequencies not greater than 60Hz.

DL/T 2033-2019: Test methods for power unit of high voltage variable frequency drive used in fossil-fuel power plants

---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.
Test methods for power unit of high voltage variable frequency drive used in fossil-fuel power plants ICS 27.100 F 23 Record number. 63143-2018 People's Republic of China Electric Power Industry Standard High voltage inverter power unit for thermal power plant experiment method 2019-06-04 released 2019-10-01 implementation Issued by National Energy Administration

Table of contents

Foreword...II 1 Scope...1 2 Normative references...1 3 Terms and definitions...1 4 Power unit...2 4.1 Composition...2 4.2 Output rated capacity...2 5 Test conditions...2 5.1 General requirements...2 5.2 Instrumentation...2 5.3 Test platform...3 6 Test...3 6.1 Test items...3 6.2 Parameter check...4 6.3 Performance test...5 6.4 Test procedure...8 7 Test report...8 7.1 Writing requirements...8 7.2 Report template...8 Appendix A (Informative Appendix) Typical Test Procedure...9 Appendix B (informative appendix) Test report template...14

Foreword

This standard is compiled in accordance with the rules of GB/T 1.1-2009 "Guidelines for Standardization Part 1.Standard Structure and Compilation". This standard was proposed by the China Electricity Council. This standard is under the jurisdiction of the China Electricity Council. Drafting organizations of this standard. China Datang Group Science and Technology Research Institute Co., Ltd. Central China Electric Power Test and Research Institute, Beijing Heli Electric Transmission Power Control Technology Co., Ltd., China Electric Power Research Institute Co., Ltd., Xuchang Longgang Power Generation Co., Ltd., Chongqing University, Datang Henan Power Generation Co., Ltd., Datang Changchun Second Thermal Power Co., Ltd. The main drafters of this standard. Han Jinhua, Jia Shaohua, Li Kai, Feng Yu, Wen Zhanyou, Zheng Yusheng, Yao Jun, Ding Junyi, Dong Hong. This standard is issued for the first time. The opinions or suggestions during the implementation of this standard will be fed back to the Standardization Management Center of the China Electricity Council (Baizhou Xuanwu District, Beijing). No. 1, Ertiao Guanglu, 100761). Test method for power unit of high voltage frequency converter for thermal power plant

1 Scope

This standard specifies the terms and definitions, test conditions, test items, parameter verification, performance of high-voltage inverter power units used in thermal power plants Test and other requirements. This standard is applicable to rated input voltage of AC 6kV and 10kV, rated input frequency is 50Hz or 60Hz, output voltage is not Power unit test of high voltage frequency converter used in thermal power plant with output frequency greater than 10kV and not greater than 60Hz.

2 Normative references

The following documents are indispensable for the application of this standard. For dated reference documents, only the dated version applies to this standard quasi. For undated reference documents, the latest version (including all amendments) is applicable to this standard. GB/T 2423.3 Environmental testing of electric and electronic products Part 3.Test method Test Cab. Constant damp heat test GB/T 2900.33 Electrical Engineering Terminology Power Electronic Technology GB/T 2900.83-2008 Electrical Terms Electrical and Magnetic Devices GB 12668.3 Speed Control Electric Drive System Part 3.Electromagnetic Compatibility Requirements and Specific Test Methods GB 12668.501-2013 Adjustable Speed Electric Drive System Part 5-1 Safety Requirements Electricity, Heat and Energy GB/T 17626.2 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test GB/T 17626.3 Electromagnetic compatibility test and measurement technology Radio frequency electromagnetic field radiation immunity test GB/T 17626.4 Electromagnetic compatibility test and measurement technology Electrical fast transient pulse group immunity test GB/T 17626.5 Electromagnetic compatibility test and measurement technology surge (impact) immunity test GB/T 17626.6 Electromagnetic compatibility test and measurement technology Radio frequency field induced conducted disturbance immunity GB/T 29332 Discrete Semiconductor Devices Part 9.Insulated Gate Bipolar Transistor (IGB T) GB/T 30843.1 General frequency conversion speed regulation equipment above 1kV but not exceeding 35kV Part 1.Technical conditions GB/T 30843.2 General frequency conversion speed regulation equipment above 1kV but not exceeding 35kV Part 2.Test method DL/T 1195-2012 Operation and maintenance specifications for high-voltage inverters used in thermal power plants

3 Terms and definitions

Defined by GB/T 2900.33, GB/T 2900.83, GB 12668.501, GB/T 30843.2, DL/T 1195 and the following terms And definitions apply to this document. For ease of use, some terms and definitions are repeated below. 3.1 High voltage variable frequency drive A speed control device that changes the output frequency and output voltage to control the speed of an AC high-voltage motor. [DL/T 1195-2012, Terms and Definitions 3.1] 3.2 Rectifier A power converter that converts single-phase or multi-phase alternating current into single-direction current. [GB/T 2900.83-2008, Terms and Definitions 151-13-45] 3.3 Inverter A power converter that converts direct current into single-phase or multi-phase alternating current. [GB/T 2900.83-2008, terms and definitions 151-13-46] 3.4 Basic insulation Set on the live part as insulation for basic protection against electric shock. [GB 12668.501-2013, terms and definitions 3.3] 3.5 Protective separation Pass basic protection and additional protection measures (basic insulation plus additional insulation or protective shielding) or an equivalent protection measure between circuits (For example, reinforced insulation) to achieve isolation. [GB 12668.501-2013, Terms and Definitions 3.32]

4 Power unit

4.1 Composition The power unit consists of a main circuit and a control circuit. The main circuit should include the input bus, rectifier, DC link, inverter, bypass loop Section, output bus. The control circuit shall include control power circuit, optical fiber communication circuit, instruction calculation circuit, IGB T drive circuit. power The typical structure schematic diagram of the main circuit of the unit is shown in Figure 1. 4.2 Output rated capacity Under the specified power supply conditions, when outputting rated voltage and rated frequency, the output capacity of the power unit should not be lower than the rated capacity.

5 Test conditions

5.1 General requirements Under normal test environment conditions, the ambient temperature range should be 5℃～40℃, the relative humidity range should be 5%～85%, no condensation; The electrical test conditions should meet the requirements of GB/T 30843.1; there should be safety measures to protect the test personnel. 5.2 Instrumentation Test instruments, meters, and sensors should be qualified by metrological verification or calibration and within the validity period. The accuracy of electrical measuring instruments should not be lower than For level 0.5 (except megohmmeter), the error of the thermometer should not be greater than ±1℃. 5.3 Test platform The test of the power unit should be carried out on a test platform equivalent to the actual work. The test platform should be composed of AC electronic loads and external power grids. to make.

6 Test

6.1 Test items 6.1.1 The samples should be subjected to type test, factory test and routine test, and the test items should meet the requirements of Table 1. 6.1.2 The test period should be set according to the operating conditions of the equipment. Routine tests should be carried out under one of the following conditions. a) 3 to 5 years after equipment operation; b) When the power unit has a serious failure; c) When the power unit replaces important parts such as control boards; d) When the high-voltage inverter stops due to frequent failures of the power unit; e) When the user considers it necessary. 6.2 Parameter check 6.2.1 Diode parameter check 6.2.2 Capacitance parameter verification Note. For power units with input voltage less than 690V, the reference capacity is calculated according to the inverse linear ratio. 6.2.3 IGB T parameter check 6.2.5 Parameter check of thyristor and contactor The parameters of thyristor and contactor shall meet the requirements of Table 5. 6.3 Performance test 6.3.1 Insulation test a) Insulation resistance b) Insulation voltage The insulation voltage of the main circuit and control circuit shall meet the requirements of Table 7. c) AC or DC voltage test 6.3.2 Control circuit power-on test The power-on test of the control circuit should test the voltage regulation range and output ripple coefficient of the regulated power supply. When testing the voltage stabilization range, the regulated power supply should be connected to the rated load. According to the requirements of the voltage stabilization range, change the input voltage amplitude and measure the output For voltage changes, the deviation between the output voltage and the rated voltage should be less than 5%. When testing the output ripple factor, the input and output voltages and load currents should be rated values. Measure the peak-to-peak output ripple voltage and output The voltage ripple factor should be less than 2%. 6.3.3 Main circuit power-on test Under the condition of IGB T blocking, power up the main circuit of the power unit and gradually increase the voltage to the rated value. Record the DC loop under different input voltages Section voltage value, capacitor voltage equalization value, alarm action status. 6.3.4 Protection function test a) Voltage protection test Voltage protection should include the functions of undervoltage, overvoltage, and input lack of equivalence. The upper limit of the undervoltage protection setting value should be less than 75%Ud, and the overvoltage protection setting value The lower limit should be greater than 125% Ud, and the alarm should be correct when the input phase is missing. Note. Ud is the rated voltage of the DC bus. b) Over-temperature protection test Apply an analog over-temperature signal to the over-temperature acquisition end of the power unit control board, and the power unit should alarm correctly. 6.3.5 IGB T drive protection test a) Drive protection test when IGB T is damaged When the IGB T in the power unit is damaged (IGB T open circuit or short circuit), the IGB T drive should have a protection function. The test principle diagram is shown in Figure 3. IGB T drive Control connection fiber Power unit control board test control unit IGB T fault generator Figure 3 Schematic diagram of drive protection test when IGB T is damaged b) Drive protection performance test To confirm the performance of the IGB T drive protection in the power unit, the power unit IGB T should be tested according to the test method in GB/T 29332 Double pulse test. 6.3.6 Electromagnetic compatibility test a) Lowest immunity The minimum immunity of the power unit shall meet the requirements of Table 9. 6.3.7 Load test a) Reactive load test Connect the reactor at the output side of the power unit to adjust the output reactive current of the power unit to 110% of the rated output current. IGB T turns off the peak The voltage should be less than 1.4Ud, the electrolytic capacitor ripple voltage should be less than 3.5% Ud, and the electrolytic capacitor ripple voltage should be less than 5.5% Ud. b) Active load test Use AC electronic load to perform active load test on the power unit to assess long-term load stability and temperature rise characteristics. Should include rated For load test and overload test, the test standards are implemented in accordance with GB/T 30843.1.The principle diagram of the active load test is shown in Figure 4. c) Damp heat test (steady state) The damp heat test (steady state) of the power unit shall be performed according to GB/T 2423.3 and GB 12668.501.The test temperature should be (40±2)℃, The relative humidity should be (93±3)%, and the exposure duration should be greater than 24h. 6.4 Test procedure Refer to Appendix A for the typical procedure of power unit test.

7 Test report

7.1 Writing requirements a) The test report should include the following. 1) Equipment parameters; 2) Test basis; 3) Test items; 4 Conclusion. b) The test item should contain the following data. 1) Measured data; 2) The test standard has the required ambient temperature or the temperature of the tested product; 3) The humidity required by the test standard; 4) Test date; 5) The name and model of the test instrument. 7.2 Report template The test report template can be found in Appendix B.

Appendix A

(Informative appendix) Test typical process A. 1 Scope of application This standard is applicable to the power unit of cascaded high voltage frequency converter. The basic parameters can be determined according to Table A.1. Table A.2 Test equipment ......

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