CN111650513B - Primary frequency modulation static test method for thermal generator set - Google Patents
Primary frequency modulation static test method for thermal generator set Download PDFInfo
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- CN111650513B CN111650513B CN202010438972.4A CN202010438972A CN111650513B CN 111650513 B CN111650513 B CN 111650513B CN 202010438972 A CN202010438972 A CN 202010438972A CN 111650513 B CN111650513 B CN 111650513B
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- 238000010998 test method Methods 0.000 title claims abstract description 9
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- 238000006243 chemical reaction Methods 0.000 claims description 3
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Abstract
The invention relates to a primary frequency modulation static test method of a thermal generator set, which is mainly technically characterized by comprising the following steps of: checking whether the thermal generator set has a frequency modulation switching function; checking whether the thermal generator set has a frequency dead zone setting function; checking whether the unequal rate setting of the thermal generator set meets the requirement or not; checking whether the thermal generator set has the function of setting the upper limit and the lower limit; and checking whether the interval time from the frequency change to the unit frequency modulation instruction change of the thermal generator unit meets the requirement. The invention has reasonable design, can fully utilize the period of unit outage, reduce the risks of equipment tripping and load fluctuation, shorten the time of primary frequency modulation dynamic test and the maintenance period of the generator set, and improve the working efficiency.
Description
Technical Field
The invention belongs to the technical field of thermal power generation, relates to a thermal power generation unit frequency modulation test, and in particular relates to a thermal power generation unit primary frequency modulation static test method.
Background
The frequency of the power grid is determined by the power generation power and the user load, when the power generation power is larger than the user load, the frequency of the power grid is increased, and otherwise, the frequency of the power grid is reduced. The primary frequency modulation is that the generator set generates a signal source through frequency fluctuation, triggers the change of a load instruction to complete the increase or decrease of active power, and meets the change of electric quantity at a user side, thereby maintaining the stability of the frequency of a power grid.
The primary frequency modulation test is used for checking the primary frequency modulation function of the generator set, detecting the change of the active power of the generator set through the change of an analog signal, analyzing through detection data, and checking whether the parameter requirements specified in the primary frequency modulation are met. The primary frequency modulation test is mainly divided into two stages, namely a static test and a dynamic test, wherein the static test is a test performed when the generator set is in a static and non-starting state, and the dynamic test is mainly a related test performed when the generator set is in a power generation state.
At present, the primary frequency modulation test is mainly carried out by adopting a dynamic test, and due to the fact that a thermal generator set overhauls or the progress of a capital construction project, the static test cannot be effectively carried out, so that the time of the dynamic test is obviously increased, the work cannot be smoothly carried out, problems are solved temporarily, the risk and the difficulty of the dynamic test are improved, and a large amount of manpower and material resources are wasted.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a primary frequency modulation static test method for a thermal generator set.
The invention solves the technical problems by adopting the following technical scheme:
a primary frequency modulation static test method of a thermal generator set comprises the following steps:
step 1, after the rated power P0 of the thermal generator set is determined, setting different analog frequency signals, and checking whether the thermal generator set has a frequency modulation switching function according to the output state of a total load instruction P3;
step 2, checking whether the thermal generator set has a frequency dead zone setting function according to different analog frequency signals, the output state of the frequency modulation instruction P2 and the frequency modulation instruction P1;
step 3, calculating the unequal rate of the thermal generator set, and checking whether the unequal rate setting of the thermal generator set meets the requirements;
step 4, checking whether the thermal generator set has the function of setting the upper limit and the lower limit according to the value of the frequency modulation instruction P2 by inputting different frequency variables;
step 5, calculating static response time, and checking whether the interval time from frequency change to unit frequency modulation instruction change of the thermal generator unit meets the requirement;
the specific implementation method of the step 1 comprises the following steps:
determining rated power P0 of a thermal generator set, and entering a step;
secondly, simulating a frequency signal f=50.1 Hz, if the total load instruction P3 is output to be a non-zero value, entering a step, otherwise, modifying the frequency modulation switching setting;
thirdly, simulating a frequency signal f=49.9Hz, if the total load instruction P3 is output to be a non-zero value, completing the checking function of the step, otherwise, modifying the frequency modulation switching setting;
the total load instruction P3 is the sum of the frequency modulation correction preload instruction P1 and the frequency modulation instruction P2;
the specific implementation method of the step 2 comprises the following steps:
the method comprises the steps that firstly, analog frequency signals f= 49.967Hz and f= 49.966Hz are generated, if the output of a frequency modulation instruction P2 is zero value and non-zero value respectively, a step is carried out, otherwise, dead zone parameter modification is carried out;
secondly, simulating frequency signals f= 50.033Hz and f= 50.034Hz, if the output of the frequency modulation instruction P2 is zero value and non-zero value respectively, entering a step, otherwise, modifying the dead zone parameters;
thirdly, simulating a frequency signal f=50.2 Hz, if the frequency modulation command P2 is output as a negative value, entering a step, otherwise, modifying positive and negative settings of the function;
the analog frequency signal f=49.8Hz is adopted, if the frequency modulation command P2 is output as a positive value, the checking function of the step is completed, otherwise, the positive and negative settings of the function are modified;
the specific implementation method of the step 3 is as follows: optionally inputting a frequency variable f between 49.72Hz and 50.28Hz, outputting a frequency modulation instruction P1, calculating the rotation speed inequality delta=P0/P1 (f 0-f)/50 x 100%, if the rotation speed inequality of the two continuous calculation results is between 4% and 5%, completing the checking function of the step, otherwise, modifying the conversion function;
the specific implementation method of the step 4 comprises the following steps:
the method comprises the steps that a frequency variable f larger than 50.28Hz is input at will, if the absolute value of a frequency modulation command P2 is equal to 0.1 x P0, a step is carried out, otherwise, the lower frequency modulation limit value is modified;
optionally inputting a frequency variable f smaller than 49.72Hz, if the absolute value of the frequency modulation command P2 is equal to 0.1P 0, completing the checking function of the step, otherwise, modifying the frequency modulation upper limit value;
the specific implementation method of the step 5 is as follows: recording the input time t0 of the frequency modulation variable f, recording the time t1 of the change of the frequency modulation instruction P2 reaching a stable value, calculating the static response time delta t=t1-t 0, if t is less than 3 seconds, completing the checking function of the step, otherwise, modifying the sampling period.
The invention has the advantages and positive effects that:
the invention has reasonable design, can effectively check the functions of primary frequency modulation switching function of the thermal generator set, primary frequency modulation upper and lower limit function of the thermal generator set, frequency modulation dead zone function of the thermal generator set, correctness of calculation results of unequal rates of the rotation speeds of the thermal generator set, correctness of static response time of frequency modulation of the thermal generator set and the like, can fully utilize the period of machine set shutdown, reduces the risks of tripping and load fluctuation of equipment, shortens the time of primary frequency modulation dynamic test and the maintenance period of the thermal generator set, and improves the working efficiency.
Drawings
FIG. 1 is a graph of thermal genset load as a function of frequency;
fig. 2 is a schematic diagram of a typical primary frequency modulation test.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides a primary frequency modulation static test method of a thermal generator set, which can realize the following test functions:
1. and checking whether the thermal generator set has a frequency modulation switching function.
2. And checking whether the thermal generator set has the function of setting the upper limit and the lower limit.
3. And checking whether the thermal generator set has a frequency dead zone setting function.
4. And checking whether the unequal rate of the thermal generator set is about 4% to 5%.
5. And checking whether the interval time from the frequency change to the unit frequency modulation command change of the thermal generator unit is more than 1 second.
In order to realize the test function, as shown in fig. 1 and 2, the primary frequency modulation static test method of the thermal generator set comprises the following steps:
1. whether the thermal generator set has the frequency modulation switching function is checked
1. And determining the rated power P0 of the thermal generator set, and entering the next step.
2. The analog frequency signal f=50.1 Hz, the total load instruction P3 outputs a non-zero value and enters the next step, otherwise, the frequency modulation switching setting is modified; the total load command P3 is the sum of the frequency modulation correction preload command P1 and the frequency modulation command P2.
3. The analog frequency signal f=49.9hz, the total load instruction P3 outputs a non-zero value to enter the next step, otherwise, the frequency modulation switching setting is modified.
2. Checking whether thermal generator set has frequency dead zone setting function
4. The analog frequency signals f= 49.967Hz and f= 49.966Hz, the output of the frequency modulation command P2 is zero value and non-zero value respectively, and the next step is carried out, otherwise, the dead zone parameter modification step is carried out.
5. The analog frequency signals f= 50.033Hz and f= 50.034Hz, the output of the frequency modulation command P2 is zero value and non-zero value respectively, if yes, the next step is carried out, otherwise, the dead zone parameter modification step is carried out.
6. The analog frequency signal f=50.2 Hz, the frequency modulation instruction outputs a negative value to enter the next step, otherwise, the positive and negative settings of the function are modified.
7. The analog frequency signal f=49.8hz, the frequency modulation instruction outputs a positive value to enter the next step, otherwise, the positive and negative settings of the function are modified.
3. Checking whether the unequal rate of the thermal generator set is about 4% to 5%
8. Optionally inputting a frequency variable f between 49.72Hz and 50.28Hz, outputting a frequency modulation command P1, calculating the rotation speed inequality delta=P0/P1 (f 0-f)/50 x 100%, and if the rotation speed inequality of the two continuous calculation results is between 4% and 5%, performing the next step, otherwise, modifying the conversion function.
4. Function for checking whether thermal generator set has upper and lower limit setting
9. Optionally inputting a frequency variable f greater than 50.28Hz, outputting a frequency modulation command P2, if the absolute value of P2 is equal to 0.1 x P0, entering the next step, otherwise, modifying the frequency modulation lower limit value.
10. Optionally inputting a frequency variable f smaller than 49.72Hz, outputting a frequency modulation instruction P2, if the absolute value of P2 is equal to 0.1 x P0, entering the next step, otherwise, modifying the frequency modulation upper limit value.
5. And checking whether the interval time from the frequency change to the unit frequency modulation command change of the thermal generator unit is more than 1 second.
11. Recording the input time t0 of the frequency modulation variable f, recording the time t1 of the change of the frequency modulation instruction P2 reaching a stable value, calculating the static response time delta t=t1-t 0, if t is smaller than 3 seconds, entering the next step, otherwise, modifying the sampling period.
12. And the primary frequency modulation static test of the thermal generator set is completed through the steps.
It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the invention includes, but is not limited to, the examples described in the detailed description, as other embodiments derived from the technical solutions of the invention by a person skilled in the art are equally within the scope of the invention.
Claims (1)
1. A primary frequency modulation static test method for a thermal generator set is characterized by comprising the following steps of: the method comprises the following steps:
step 1, after the rated power P0 of the thermal generator set is determined, setting different analog frequency signals, and checking whether the thermal generator set has a frequency modulation switching function according to the output state of a total load instruction P3;
step 2, checking whether the thermal generator set has a frequency dead zone setting function according to different analog frequency signals, the output state of the frequency modulation instruction P2 and the frequency modulation instruction P1;
step 3, calculating the unequal rate of the thermal generator set, and checking whether the unequal rate setting of the thermal generator set meets the requirements;
step 4, checking whether the thermal generator set has the function of setting the upper limit and the lower limit according to the value of the frequency modulation instruction P2 by inputting different frequency variables;
step 5, calculating static response time, and checking whether the interval time from frequency change to unit frequency modulation instruction change of the thermal generator unit meets the requirement;
the specific implementation method of the step 1 comprises the following steps:
determining rated power P0 of a thermal generator set, and entering a step;
secondly, simulating a frequency signal f=50.1 Hz, if the total load instruction P3 is output to be a non-zero value, entering a step, otherwise, modifying the frequency modulation switching setting;
thirdly, simulating a frequency signal f=49.9Hz, if the total load instruction P3 is output to be a non-zero value, completing the checking function of the step, otherwise, modifying the frequency modulation switching setting;
the total load instruction P3 is the sum of the frequency modulation correction preload instruction P1 and the frequency modulation instruction P2;
the specific implementation method of the step 2 comprises the following steps:
the method comprises the steps that firstly, analog frequency signals f= 49.967Hz and f= 49.966Hz are generated, if the output of a frequency modulation instruction P2 is zero value and non-zero value respectively, a step is carried out, otherwise, dead zone parameter modification is carried out;
secondly, simulating frequency signals f= 50.033Hz and f= 50.034Hz, if the output of the frequency modulation instruction P2 is zero value and non-zero value respectively, entering a step, otherwise, modifying the dead zone parameters;
thirdly, simulating a frequency signal f=50.2 Hz, if the frequency modulation command P2 is output as a negative value, entering a step, otherwise, modifying positive and negative settings of the function;
the analog frequency signal f=49.8Hz is adopted, if the frequency modulation command P2 is output as a positive value, the checking function of the step is completed, otherwise, the positive and negative settings of the function are modified;
the specific implementation method of the step 3 is as follows: optionally inputting a frequency variable f between 49.72Hz and 50.28Hz, outputting a frequency modulation instruction P1, calculating the rotation speed inequality delta=P0/P1 (f 0-f)/50 x 100%, if the rotation speed inequality of the two continuous calculation results is between 4% and 5%, completing the checking function of the step, otherwise, modifying the conversion function;
the specific implementation method of the step 4 comprises the following steps:
the method comprises the steps that a frequency variable f larger than 50.28Hz is input at will, if the absolute value of a frequency modulation command P2 is equal to 0.1 x P0, a step is carried out, otherwise, the lower frequency modulation limit value is modified;
optionally inputting a frequency variable f smaller than 49.72Hz, if the absolute value of the frequency modulation command P2 is equal to 0.1P 0, completing the checking function of the step, otherwise, modifying the frequency modulation upper limit value;
the specific implementation method of the step 5 is as follows: recording the input time t0 of the frequency modulation variable f, recording the time t1 of the change of the frequency modulation instruction P2 reaching a stable value, calculating the static response time delta t=t1-t 0, if t is less than 3 seconds, completing the checking function of the step, otherwise, modifying the sampling period.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105520A (en) * | 2007-08-08 | 2008-01-16 | 陕西电力科学研究院 | Generating set primary frequency regulation test method and emulating instrument for test |
| CN101290341A (en) * | 2008-06-17 | 2008-10-22 | 四川中鼎科技有限公司 | Hydroelectric units primary frequency modulation performance test method |
| CN101672893A (en) * | 2008-09-10 | 2010-03-17 | 华东电力试验研究院有限公司 | Generator set primary frequency modulation performance testing method for simulating grid frequency change |
| CN102611124A (en) * | 2012-03-10 | 2012-07-25 | 山东电力研究院 | Primary frequency regulation control method applicable to thermal generator set of intelligent power grid |
| CN105045229A (en) * | 2015-06-26 | 2015-11-11 | 国网山东省电力公司电力科学研究院 | Thermal power generating unit primary frequency modulation optimization control method based on time compensation and device |
| JP3218709U (en) * | 2017-08-24 | 2018-11-01 | 赫普科技発展（北京）有限公司 | Power grid frequency modulation system based on electrode-type boiler |
| CN108802609A (en) * | 2018-04-16 | 2018-11-13 | 国网福建省电力有限公司 | A kind of primary frequency modulation performance lifting test method considering nuclear power generating sets tolerance |
| CN109103927A (en) * | 2018-08-23 | 2018-12-28 | 国网江苏省电力有限公司 | Improve the speed-regulating system PID controller parameter setting method of primary frequency modulation dynamic response characteristic |
| CN109669122A (en) * | 2019-01-17 | 2019-04-23 | 国网河南省电力公司电力科学研究院 | Generating set primary frequency regulation active Online Transaction Processing and its application method |
| CN110768288A (en) * | 2019-09-27 | 2020-02-07 | 国网天津市电力公司电力科学研究院 | Real-time evaluation method for primary frequency modulation speed regulation unequal rate of thermal generator set |
-
2020
- 2020-05-22 CN CN202010438972.4A patent/CN111650513B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101105520A (en) * | 2007-08-08 | 2008-01-16 | 陕西电力科学研究院 | Generating set primary frequency regulation test method and emulating instrument for test |
| CN101290341A (en) * | 2008-06-17 | 2008-10-22 | 四川中鼎科技有限公司 | Hydroelectric units primary frequency modulation performance test method |
| CN101672893A (en) * | 2008-09-10 | 2010-03-17 | 华东电力试验研究院有限公司 | Generator set primary frequency modulation performance testing method for simulating grid frequency change |
| CN102611124A (en) * | 2012-03-10 | 2012-07-25 | 山东电力研究院 | Primary frequency regulation control method applicable to thermal generator set of intelligent power grid |
| CN105045229A (en) * | 2015-06-26 | 2015-11-11 | 国网山东省电力公司电力科学研究院 | Thermal power generating unit primary frequency modulation optimization control method based on time compensation and device |
| JP3218709U (en) * | 2017-08-24 | 2018-11-01 | 赫普科技発展（北京）有限公司 | Power grid frequency modulation system based on electrode-type boiler |
| CN108802609A (en) * | 2018-04-16 | 2018-11-13 | 国网福建省电力有限公司 | A kind of primary frequency modulation performance lifting test method considering nuclear power generating sets tolerance |
| CN109103927A (en) * | 2018-08-23 | 2018-12-28 | 国网江苏省电力有限公司 | Improve the speed-regulating system PID controller parameter setting method of primary frequency modulation dynamic response characteristic |
| CN109669122A (en) * | 2019-01-17 | 2019-04-23 | 国网河南省电力公司电力科学研究院 | Generating set primary frequency regulation active Online Transaction Processing and its application method |
| CN110768288A (en) * | 2019-09-27 | 2020-02-07 | 国网天津市电力公司电力科学研究院 | Real-time evaluation method for primary frequency modulation speed regulation unequal rate of thermal generator set |
Non-Patent Citations (1)
| Title |
|---|
| 330MW供热机组协调优化控制策略研究和应用;田猛;中国优秀硕士学位论文全文数据库 (工程科技Ⅱ辑)(第5期);第042至122页 * |
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