CN111650512A - Follow-up load disturbance test method for automatic power generation control of thermal generator set - Google Patents
Follow-up load disturbance test method for automatic power generation control of thermal generator set Download PDFInfo
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- CN111650512A CN111650512A CN202010438933.4A CN202010438933A CN111650512A CN 111650512 A CN111650512 A CN 111650512A CN 202010438933 A CN202010438933 A CN 202010438933A CN 111650512 A CN111650512 A CN 111650512A
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Abstract
The invention relates to a follow-up load disturbance test method for automatic power generation control of a thermal generator set, which is mainly technically characterized by comprising the following steps of: setting the rated power, the initial load value and the target load value of the thermal generator set, and entering a follow-up load disturbance mode; recording different moments of load change and actual load at the moments according to the load change curve of the automatic power generation control follow-up disturbance test; and (4) checking whether the automatic power generation control speed regulation function, the control response time, the dynamic deviation and the static deviation are qualified or not under the follow-up test of the thermal generator set. The invention has reasonable design, shortens the test time, reduces the risk of unit load fluctuation and equipment outage, improves the working efficiency and can provide scientific guidance for the automatic power generation control test.
Description
Technical Field
The invention belongs to the technical field of thermal power generation, and relates to a disturbance test of a thermal generator set, in particular to an automatic power generation control follow-up load disturbance test method of the thermal generator set.
Background
The automatic power generation control technology is a very important technology of a generator set. The control target of the automatic power generation control is that the regional load error generated by the load change is continuously reduced to zero, the regulating and controlling center regulates the output of the thermal generator set and the load balance of the power grid, the exchange power of the tie lines in the region is maintained in the range of the planned value, the regional operation cost is reduced, and the frequency stability of the power grid is kept.
With the continuous upgrade of 'two fine rules' of a power grid, the platform checks and improves the requirements of the thermal generator set on the load regulation quality, an automatic power generation control test mainly aims at a newly built generator set or a major repair generator set and checks whether the related requirements of automatic power generation control can be met, the regulation performance of the generator set is improved through the improvement and adjustment of a coordinated control function, all main control systems of the generator set are automatically put into normal operation while the indexes of the fine rules are met, and the indexes of the automatic regulation performance meet the related technical specification requirements.
The automatic power generation control test mainly comprises two stages, namely a step load disturbance test and a follow-up load disturbance test, no mature test method exists at present, and in order to better complete test tasks of various stages, scientifically and reasonably analyze indexes of the test stages and complete an automatic power generation control test target, an automatic power generation control follow-up load disturbance test method is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a thermal generator set automatic power generation control follow-up load disturbance test method, which can effectively perform an automatic power generation control follow-up load disturbance test, shorten the test time, reduce the risk of unit load fluctuation and equipment outage and improve the working efficiency.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a thermal generator set automatic power generation control follow-up load disturbance test method comprises the following steps:
step 1, setting rated power P0, an initial load value M0 and a target load value Mn of a thermal generator set, and entering a follow-up load disturbance mode;
step 2, recording different moments of load change and actual loads at the moments according to the load change curve of the automatic power generation control follow-up disturbance test;
and 3, checking whether the automatic power generation control speed regulation function under the follow-up test of the thermal power generating set is qualified, checking whether the automatic power generation control response time under the follow-up test of the thermal power generating set is qualified, checking whether the automatic power generation control dynamic deviation under the follow-up test of the thermal power generating set is qualified and checking whether the automatic power generation control static deviation under the follow-up test of the thermal power generating set is qualified.
Moreover, the specific implementation method of the step 2 comprises the following steps:
the method comprises the steps that at the ith time ti0 of the change of an automatic power generation control command, i is continuously increased from 1, an automatic power generation control command P1 is changed from an initial load value M0 to a target load value Mn, and the second step is carried out, otherwise, the first step is stopped;
secondly, at the ith actual load command change time ti1, i is continuously increased from 1, the actual load command P2 of the thermal generator set is changed from the initial load value M0 to the target load value Mn according to the set speed, and the third step is carried out, otherwise, the step is stopped;
thirdly, at the moment ti2 when the actual load jumps out of the dead zone for the ith time, changing the actual load P3 of the thermal generator set from M0 to Mi direction and jumping out of the dead zone, namely leaving the area M0 +/-P0 x 1%, continuously increasing i from 1, namely leaving the area Mi +/-P0 x 1%, and entering the fourth step, otherwise, staying the step;
fourthly, at the time t3 when the actual load enters the target value dead zone, the thermal generator set enters the region Mn +/-P0 x 1%, the processing of the step is finished, and otherwise, the thermal generator set stops at the step;
wherein, i is 1, 2.
Moreover, the method for checking whether the automatic power generation control speed regulation function is qualified under the follow-up test of the thermal generator set comprises the following steps: and calculating the automatic power generation control regulation rate (Mn-M0)/(t3-ti2) under the follow-up test, wherein i is 1, and judging whether the regulation rate is greater than P0 x 2%, if so, the regulation rate is qualified, and otherwise, the regulation rate is not qualified.
Moreover, the method for checking whether the response time of the automatic power generation control under the follow-up test of the thermal generator set is qualified comprises the following steps: and calculating the response time max (ti2-ti1) of each command change, judging whether the response time is less than 60 seconds, if so, determining that the response time is qualified if i is continuously increased from 1, and otherwise, determining that the response time is unqualified.
Moreover, the method for checking whether the automatic power generation control dynamic deviation under the thermal generator set follow-up test is qualified comprises the following steps: and from the time ti0 to the time t3, wherein i is 1, judging whether max (P2-P3) is greater than P0 x 2%, if so, determining that the product is qualified, and otherwise, determining that the product is not qualified.
Moreover, the method for checking whether the automatic power generation control static deviation under the follow-up test of the thermal generator set is qualified comprises the following steps: and judging whether max (P3-P1) is greater than P0 x 1% within 10 minutes from the time t3 or after the target load value Mn changes again, if so, the product is qualified, and otherwise, the product is not qualified.
The invention has the advantages and positive effects that:
1. the invention has reasonable design, can quickly and reliably carry out the automatic power generation control follow-up load disturbance test, realizes the test functions of whether the automatic power generation control speed regulation function is qualified, whether the automatic power generation control response time is qualified, whether the automatic power generation control dynamic deviation is qualified, whether the automatic power generation control static deviation is qualified and the like under the follow-up test, effectively shortens the test time, reduces the load fluctuation of a unit and the risk of equipment shutdown, and improves the working efficiency.
2. The invention can scientifically and reasonably analyze the indexes of the test stage, can finish the follow-up load disturbance test target of the automatic power generation control of the thermal generator set, gives detailed test steps and test conditions and provides scientific guidance for the automatic power generation control test.
Drawings
FIG. 1 is a load variation curve diagram of an automatic power generation control follow-up disturbance test of a thermal generator set.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides a follow-up load disturbance test method for automatic power generation control of a thermal generator set, which can realize the following test functions:
1. and (4) checking whether the automatic power generation control speed regulation function is qualified or not under the unit follow-up test.
2. And (4) checking whether the response time of the automatic power generation control under the unit follow-up test is qualified.
3. And (4) checking whether the automatic power generation control dynamic deviation is qualified under the unit follow-up test.
4. And (5) checking whether the static deviation of the automatic power generation control under the unit follow-up test is qualified.
In order to realize the test function, as shown in fig. 1, the automatic power generation control follow-up load disturbance test method for the thermal generator set comprises the following steps:
1. and determining the rated power P0 of the thermal generator set, and entering the next step, otherwise, stopping the step.
2. And determining an initial load value M0 of the thermal generator set, and entering the next step, otherwise, stopping the step.
3. And determining an initial load value Mn of the thermal generator set, entering the next step, and otherwise, stopping the step.
4. And if the thermal generator set is in a follow-up load disturbance mode, entering the next step, otherwise, stopping the step.
5. At the ith time of change of the automatic power generation control command ti0(i 1, 2.. the.), the automatic power generation control command P1 is changed from M0 to Mi (i 1, 2.. the., i is continuously increased from 1, gradually changed to the target load value Mn, and the next step is carried out, otherwise, the step is stopped.
6. At the ith actual load command change time ti1(i 1, 2.....), the actual load command P2 of the thermal generator set is changed from M0 to Mi (i 1, 2.......), i is continuously increased from 1 and is changed step by step until Mn, and the next step is carried out, otherwise, the step is stopped.
7. At the i-th actual load jump dead zone time ti2(i 1, 2....) the thermal generator set actual load P3 changes from M0 to Mi (i 1, 2.....) and jumps out of the dead zone, i.e. leaves the M0 ± P0 × 1% region, i increases from 1 continuously, i.e. leaves the Mi (i 1, 2...) ± P0 × 1% region, and then enters the next step, otherwise, the step is stopped.
8. And at the moment t3 when the actual load enters the target dead zone, gradually changing the actual load of the unit through step disturbance, finally entering the Mn +/-P0 x 1% area, entering the next step, and otherwise, staying in the step.
9. And (3) calculating the automatic power generation control regulation rate (Mn-M0)/(t3-ti2) (i is 1) under the follow-up test, judging whether the regulation rate is greater than P0 x 2%, if so, entering the next step, and if not, continuing to perform a new step cycle after optimizing the program.
10. And calculating the response time max (ti2-ti1) of each command change, judging whether the response time is less than 60 seconds, if i is continuously increased from 1, entering the next step, and if not, continuing to perform a new step cycle after optimizing the program.
11. Calculating the dynamic deviation of automatic power generation control under the follow-up test: from the time ti0(i equals 1) to the time t3, judging whether max (P2-P3) is greater than P0 × 2%, if yes, entering the next step, otherwise, continuing to perform a new step cycle after the optimization program;
12. calculating the static deviation of automatic power generation control under the follow-up test: and (4) calculating whether max (P3-P1) is greater than P0 x 1% within 10 minutes from the time t3 or after the target load value Mn changes again, if so, entering the next step, otherwise, continuing to perform a new step cycle after the optimization program.
13. The step disturbance test of the automatic power generation control of the thermal generator set is completed through the steps.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.
Claims (6)
1. A thermal generator set automatic power generation control follow-up load disturbance test method is characterized by comprising the following steps:
step 1, setting rated power P0, an initial load value M0 and a target load value Mn of a thermal generator set, and entering a follow-up load disturbance mode;
step 2, recording different moments of load change and actual loads at the moments according to the load change curve of the automatic power generation control follow-up disturbance test;
and 3, checking whether the automatic power generation control speed regulation function under the follow-up test of the thermal power generating set is qualified, checking whether the automatic power generation control response time under the follow-up test of the thermal power generating set is qualified, checking whether the automatic power generation control dynamic deviation under the follow-up test of the thermal power generating set is qualified and checking whether the automatic power generation control static deviation under the follow-up test of the thermal power generating set is qualified.
2. The automatic power generation control follow-up load disturbance test method of the thermal generator set according to claim 1, characterized in that: the specific implementation method of the step 2 comprises the following steps:
the method comprises the steps that at the ith time ti0 of the change of an automatic power generation control command, i is continuously increased from 1, an automatic power generation control command P1 is changed from an initial load value M0 to a target load value Mn, and the second step is carried out, otherwise, the first step is stopped;
secondly, at the ith actual load command change time ti1, i is continuously increased from 1, the actual load command P2 of the thermal generator set is changed from the initial load value M0 to the target load value Mn according to the set speed, and the third step is carried out, otherwise, the step is stopped;
thirdly, at the moment ti2 when the actual load jumps out of the dead zone for the ith time, changing the actual load P3 of the thermal generator set from M0 to Mi direction and jumping out of the dead zone, namely leaving the area M0 +/-P0 x 1%, continuously increasing i from 1, namely leaving the area Mi +/-P0 x 1%, and entering the fourth step, otherwise, staying the step;
fourthly, at the time t3 when the actual load enters the target value dead zone, the thermal generator set enters the region Mn +/-P0 x 1%, the processing of the step is finished, and otherwise, the thermal generator set stops at the step;
wherein, i is 1, 2.
3. The automatic power generation control follow-up load disturbance test method of the thermal generator set according to claim 2, characterized in that: the method for checking whether the automatic power generation control speed regulation function is qualified under the follow-up test of the thermal generator set comprises the following steps: and calculating the automatic power generation control regulation rate (Mn-M0)/(t3-ti2) under the follow-up test, wherein i is 1, and judging whether the regulation rate is greater than P0 x 2%, if so, the regulation rate is qualified, and otherwise, the regulation rate is not qualified.
4. The automatic power generation control follow-up load disturbance test method of the thermal generator set according to claim 2, characterized in that: the method for checking whether the response time of the automatic power generation control under the follow-up test of the thermal generator set is qualified comprises the following steps: and calculating the response time max (ti2-ti1) of each command change, judging whether the response time is less than 60 seconds, if so, determining that the response time is qualified if i is continuously increased from 1, and otherwise, determining that the response time is unqualified.
5. The automatic power generation control follow-up load disturbance test method of the thermal generator set according to claim 2, characterized in that: the method for detecting whether the automatic power generation control dynamic deviation is qualified under the follow-up test of the thermal generator set comprises the following steps: and from the time ti0 to the time t3, wherein i is 1, judging whether max (P2-P3) is greater than P0 x 2%, if so, determining that the product is qualified, and otherwise, determining that the product is not qualified.
6. The automatic power generation control follow-up load disturbance test method of the thermal generator set according to claim 2, characterized in that: the method for detecting whether the automatic power generation control static deviation is qualified under the follow-up test of the thermal generator set comprises the following steps: and judging whether max (P3-P1) is greater than P0 x 1% within 10 minutes from the time t3 or after the target load value Mn changes again, if so, the product is qualified, and otherwise, the product is not qualified.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112904133A (en) * | 2021-02-10 | 2021-06-04 | 南方电网科学研究院有限责任公司 | Step performance testing method and system of direct current control protection system |
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- 2020-05-22 CN CN202010438933.4A patent/CN111650512A/en active Pending
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| CN103901875A (en) * | 2014-03-06 | 2014-07-02 | 国家电网公司 | Load change actual increasing and decreasing rate calculating method for generator unit AGC test |
| CN103901297A (en) * | 2014-03-10 | 2014-07-02 | 国家电网公司 | Method for determining response time of generator unit in AGC test |
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Cited By (2)
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| CN112904133A (en) * | 2021-02-10 | 2021-06-04 | 南方电网科学研究院有限责任公司 | Step performance testing method and system of direct current control protection system |
| CN112904133B (en) * | 2021-02-10 | 2022-02-25 | 南方电网科学研究院有限责任公司 | Step performance testing method and system of direct current control protection system |
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