CN112683543A - Gas-steam combined cycle unit phase-feed capacity cooperative test method and device - Google Patents
Gas-steam combined cycle unit phase-feed capacity cooperative test method and device Download PDFInfo
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Abstract
The invention relates to a gas-steam combined cycle unit phase-feed capacity cooperative test method and a device, wherein the method comprises the following steps: acquiring basic data of a tested gas-steam combined cycle unit, wherein the tested gas-steam combined cycle unit comprises a gas unit and a steam unit; acquiring meteorological data of a test day; determining a plurality of test operating points of the gas unit and a plurality of test operating points of the steam unit based on the basic data and the meteorological data; determining the sequence of the phase-entering test working conditions of the tested gas-steam combined cycle unit based on all test working condition points; estimating the reactive phase advance depth corresponding to each phase advance test working condition according to the statics limitation; and executing the phase advancing test based on the sequence of the phase advancing test working conditions and the reactive phase advancing depth under each phase advancing test working condition. Compared with the prior art, the method has the advantages of more accurately selecting the phase-entering test working condition, shortening the test time and the like.
Description
Technical Field
The invention belongs to the technical field of network source coordination, relates to a generator phase-entering test method, and particularly relates to a gas-steam combined cycle unit phase-entering capability cooperative test method and device.
Background
According to DL/T1523 & ltsynchronous generator phase advance test guide & gt & lt/EN & gt, the maximum value, the minimum value and the intermediate point of the normal operating power of the unit are selected according to the active working conditions of the test unit, the phase advance test working conditions of the steam turbine and the water turbine are given, and the guide is not suitable for the phase advance test of the gas unit or the gas-steam combined cycle unit.
Before a phase advance test is started, a test working condition of a tested unit needs to be given in advance, the traditional phase advance test working condition is often given based on the rated working condition of a generator set, however, for a gas-steam combined cycle unit, in the actual operation process, the performance of the unit can be influenced by atmospheric temperature, atmospheric pressure, atmospheric humidity and the like, so that the unit operates under the condition of variable working conditions. In addition, the steam turbine in the gas-steam combined cycle unit is similar to the traditional steam turbine in unit structure and working principle, but the operation condition is limited by the performance of the gas turbine and can not actively adjust the load requirement. Therefore, the performance verification process of the gas turbine and the steam turbine is also different from that of the conventional gas turbine or steam turbine. How to carry out effective phase advance test on the combined cycle unit of gas-steam combination is a technical problem to be solved in the field.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method and a device for cooperatively testing the phase-feeding capacity of a gas-steam combined cycle unit with high test efficiency aiming at the special operating condition of the gas-steam combined cycle unit.
The purpose of the invention can be realized by the following technical scheme:
a phase-feed capacity cooperative test method for a gas-steam combined cycle unit comprises the following steps:
acquiring basic data of a tested gas-steam combined cycle unit, wherein the tested gas-steam combined cycle unit comprises a gas unit and a steam unit;
acquiring meteorological data of a test day;
determining a plurality of test operating points of the gas unit and a plurality of test operating points of the steam unit based on the basic data and the meteorological data;
determining the sequence of the phase advance test working conditions of the tested gas-steam combined cycle unit based on the cooperative fit of all test working condition points;
estimating the reactive phase advance depth corresponding to each phase advance test working condition according to the statics limitation;
and executing the phase advancing test based on the sequence of the phase advancing test working conditions and the reactive phase advancing depth under each phase advancing test working condition.
Further, the basic data comprises a unit grid-connected mode, a service power wiring mode, a cooling mode, historical operation data, voltage limits of all levels and temperature limits of all measuring points.
Further, the meteorological data includes ambient temperature, atmospheric pressure, and relative humidity.
Further, the specific determination of the test working condition points of the gas turbine unit is as follows:
acquiring the maximum operation working condition P of the gas turbine set on a test day according to the basic data and the meteorological datamaxAnd a minimum operating condition Pmin；
Based on PmaxAnd PminAnd determining a plurality of test working condition points of the gas turbine set.
And further, determining the sequence of the phase advance test working conditions of the tested gas-steam combined cycle unit by adopting a line method.
Further, the circuit method specifically comprises:
respectively listing the test working condition points of the gas unit and the steam unit, forming a line between the two test working condition points which can be simultaneously established, numbering each line from top to bottom and from small to large in sequence, and determining the sequence of the phase advance test working condition of the tested gas-steam combined cycle unit.
Further, in the circuit method, if a test working condition point of the gas turbine unit without the formed circuit exists, the test working condition point is used as the last phase advance test working condition.
Further, in the line method, if two lines are formed at a test working condition point of one steam unit, the number is small;
and if the test working condition points of the steam units without the formed lines exist, the test working condition points of the steam units are determined again.
The invention also provides a phase-feed capability cooperative test device of the gas-steam combined cycle unit, which comprises:
one or more processors;
a memory; and
one or more programs stored in the memory, the one or more programs including instructions for performing the gas-steam combined cycle unit phase advance capability co-test method as described above.
The present invention also provides a computer readable storage medium including one or more programs for execution by one or more processors of an electronic device, the one or more programs including instructions for performing the gas-steam combined cycle unit phase advance capability co-test method as described above.
Compared with the prior art, the invention has the following beneficial effects:
1. the method can efficiently and accurately select the cooperative phase advance test working condition of the gas-steam combined cycle unit, can provide basis and reference for determining the phase advance test scheme of the gas-steam combined cycle unit, and can reasonably solve the problems of uncertainty of variable working condition operation of the combined cycle unit and cooperation among the units.
2. The invention can determine the phase advance operation capability of the gas turbine and the steam turbine through one-time phase advance capability cooperative test, and can shorten the test time.
3. Different from the traditional phase advance tests of a gas turbine and a steam turbine which are separately carried out, the invention definitely provides a cooperative method of the phase advance tests of the combined cycle unit, reduces the difficulty of the arrangement of the dispatching tests of a power plant and a power grid, and greatly shortens the time of the preparation work and the test process of the tests.
4. The invention adopts a line method to determine the sequence of the phase-entering test working conditions of the tested gas-steam combined cycle unit, can accurately obtain the test working conditions and the sequence thereof which meet the operation requirements, and improves the test efficiency.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a circuit diagram of the operation conditions that can be realized by a certain gas-steam combined cycle unit on the same day of the test in the embodiment.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
As shown in fig. 1, the present embodiment provides a method for cooperatively testing a phase advance capability of a gas-steam combined cycle unit, including:
and step S1, acquiring basic data of a tested gas-steam combined cycle unit, wherein the tested gas-steam combined cycle unit comprises a gas unit (combustion engine) and a steam unit (steam engine). The basic data comprise a unit grid-connected mode, an auxiliary power wiring mode, a cooling mode, historical operation data, voltage limits of all levels and temperature limits of all measuring points.
And determining the test date, and acquiring meteorological data of the test date, including the ambient temperature, the atmospheric pressure, the relative humidity and the like.
According to the basic dataObtaining the maximum operation working condition P of the gas turbine unit under the corresponding external environmentmaxAnd a minimum operating condition Pmin。
And step S2, determining a plurality of test working condition points of the gas turbine set based on the basic data and the meteorological data.
In this embodiment, the test operating point of the gas turbine unit is determined as P of the combustion enginemax、PminAnd "0.5 (Pmax + Pmin)" as shown in FIG. 2.
And step S3, determining a plurality of test working condition points of the steam unit.
The operating conditions of the steam turbine are limited by the performance of the combustion engine and cannot actively adjust the load requirements, so that the combustion engine and the steam turbine need to be cooperatively matched. In this embodiment, the test operating point of the steam turbine is determined to be 100% PN、75％PNAnd 50% PN，PNThe rated active power of the steam turbine is shown in fig. 2.
The test conditions of the combustion engine and the steam engine, including but not limited to the classification conditions shown in fig. 2, can be classified by testers according to actual conditions.
And step S4, determining the sequence of the phase advance test working conditions of the tested gas-steam combined cycle unit based on the cooperative fit of all the test working condition points.
In this embodiment, the sequence of the phase advance test conditions of the tested gas-steam combined cycle unit is determined by a line method. The process of determining the test sequence is specifically as follows: respectively listing required test working condition points, connecting the two test working condition points which can be simultaneously established by lines, namely lines, based on the cooperative fit between the gas turbine and the steam turbine, and numbering each line from top to bottom and from small to large in sequence, as shown in fig. 2, sequentially referring to a line 1, a line 2, a line 3 and a line 4.
Particularly, the working condition point without a connecting line for the combustion engine is used as the last test working condition, and the working condition of the steam turbine has two lines, and the number is small. And if the working condition of the steam turbine has no line, judging that the working condition of the steam turbine is not established, repeating the step S3, and dividing again to determine the test working condition points of the steam turbine.
And step S5, estimating the reactive advancing phase depth corresponding to each advancing phase test working condition according to the static stability limit (static stability limit). The present embodiment is limited to a generator power angle of not more than 70 °.
And step S6, executing a phase advancing test based on the sequence of the phase advancing test working conditions and the reactive phase advancing depth under each phase advancing test working condition. As shown in FIG. 2, the test was carried out starting from line 1, with the engine running from PmaxStarting a phase advance test, after the test is finished, keeping the active power of the gas turbine unchanged, restoring the idle power to the slow phase operation, and starting the steam turbine to perform 100% PNThe phase advance test of (1); steam turbine 75% PNAfter the phase-entering operation test is finished, the phase-lagging operation is recovered, and then the steam turbine is regulated to 75% PNWorking conditions, developing a phase-in operation test, namely a line 2; the phase advance operation test of the combustion engine "0.5 (Pmax + Pmin)" is carried out, and after the test is finished, the steam turbine 50% P is developedNThe phase advance operation test of (4); the combustion engine Pmin is taken as the last test condition.
The above functions, if implemented in the form of software functional units and sold or used as a separate product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Example 2
The embodiment provides a gas-steam combined cycle unit phase advance capability cooperative test device, which comprises one or more processors, a memory and one or more programs stored in the memory, wherein the one or more programs comprise instructions for executing the gas-steam combined cycle unit phase advance capability cooperative test method in the embodiment 1.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A phase advance capability cooperative test method for a gas-steam combined cycle unit is characterized by comprising the following steps:
acquiring basic data of a tested gas-steam combined cycle unit, wherein the tested gas-steam combined cycle unit comprises a gas unit and a steam unit;
acquiring meteorological data of a test day;
determining a plurality of test operating points of the gas unit and a plurality of test operating points of the steam unit based on the basic data and the meteorological data;
determining the sequence of the phase advance test working conditions of the tested gas-steam combined cycle unit based on the cooperative fit of all test working condition points;
estimating the reactive phase advance depth corresponding to each phase advance test working condition according to the statics limitation;
and executing the phase advancing test based on the sequence of the phase advancing test working conditions and the reactive phase advancing depth under each phase advancing test working condition.
2. The gas-steam combined cycle unit phase advance capability collaborative test method according to claim 1, characterized in that the basic data includes a unit grid-connected mode, a service power connection mode, a cooling mode, historical operation data, voltage limits of each stage and temperature limits of each measuring point.
3. The gas-steam combined cycle unit phase advance capability synergy test method of claim 1, characterized in that the meteorological data comprises ambient temperature, atmospheric pressure and relative humidity.
4. The gas-steam combined cycle unit phase advance capability cooperative test method according to claim 1, characterized in that determining the test operating condition points of the gas unit specifically is:
acquiring the maximum operation working condition P of the gas turbine set on a test day according to the basic data and the meteorological datamaxAnd a minimum operating condition Pmin；
Based on PmaxAnd PminAnd determining a plurality of test working condition points of the gas turbine set.
5. The gas-steam combined cycle unit phase advance capability cooperative test method according to claim 1, characterized in that a line method is adopted to determine the sequence of the phase advance test working conditions of the tested gas-steam combined cycle unit.
6. The gas-steam combined cycle unit phase-feed capacity cooperative test method according to claim 5, wherein the circuit method specifically comprises:
respectively listing the test working condition points of the gas unit and the steam unit, forming a line between the two test working condition points which can be simultaneously established, numbering each line from top to bottom and from small to large in sequence, and determining the sequence of the phase advance test working condition of the tested gas-steam combined cycle unit.
7. The gas-steam combined cycle unit phase advance capability cooperative test method according to claim 6, wherein in the line method, if there is a test operating point of a gas unit without a line, the test operating point is taken as a last phase advance test operating point.
8. The gas-steam combined cycle unit phase advance capability cooperative test method according to claim 6, characterized in that in the line method, if there are two lines formed at a test operating point of one steam unit, the number is small;
and if the test working condition points of the steam units without the formed lines exist, the test working condition points of the steam units are determined again.
9. The utility model provides a gas-steam combined cycle unit advance looks ability collaborative test device which characterized in that includes:
one or more processors;
a memory; and
one or more programs stored in the memory, the one or more programs including instructions for performing the gas-steam combined cycle unit phase advance capability co-test method of any of claims 1-8.
10. A computer readable storage medium comprising one or more programs for execution by one or more processors of an electronic device, the one or more programs comprising instructions for performing the gas-steam combined cycle unit processivity co-testing method of any one of claims 1-8.
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