CN105046578A - Experimental method for testing electrical load adjusting capability of heat and power cogeneration unit in heat supply period - Google Patents
Experimental method for testing electrical load adjusting capability of heat and power cogeneration unit in heat supply period Download PDFInfo
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Abstract
The invention relates to an experimental method for testing an electrical load adjusting capability of a heat and power cogeneration unit in a heat supply period, and includes the steps of: (1) selecting different heating steam extraction flow operating points of the test unit respectively; (2) determining test boundary conditions; (3) changing a power generation load of the unit by changing the evaporation amount of a boiler, and determining maximum and minimum load operating points of the unit respectively for each steam extraction flow operating point; (4) recording test parameters of each test operating point, thereby forming original test data; and (5) performing curve fitting on a relation between the unit power generation load and the heating steam extraction flow, thereby obtaining an adjustable range of the unit power generation load under operating conditions of different heating steam extraction flow. The method provided by the invention reasonably utilizes an electrical load peak adjusting capability of the heat and power cogeneration unit, is in favor of an electric power and electric quantity balance of a region, effectively regulates and controls call wires, and can also remarkably improve economic efficiency of system operation and management of an electric power company.
Description
Technical field
The invention belongs to cogeneration units electric load peak modulation capacity technical field, particularly a kind of experimental technique testing cogeneration units heat supply phase electric load adjustment capability.
Background technology
Cogeneration units in the winter time heating period electricity determining by heat when, peak modulation capacity just declines thereupon, Appropriate application cogeneration units electric load peak modulation capacity, not only be conducive to completing regional balance of electric power and ener when installed capacity is limited, Effective Regulation interconnection, also can significantly improve the business efficiency of Utilities Electric Co.'s system cloud gray model and operation.At present, not for cogeneration units electric load peak modulation capacity field comparative maturity and the test method that can be applied to engineering field.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, and propose a kind of experimental technique testing cogeneration units heat supply phase electric load adjustment capability.
The present invention solves its technical matters and takes following technical scheme to realize:
Test an experimental technique for cogeneration units heat supply phase electric load adjustment capability, comprise step as follows:
(1), according to the test unit determined, choose the different heating extraction flow operating points of test unit respectively;
Wherein, choosing of heating extraction flow operating point at least comprises three operating points, is specially minimum heating extraction flow operating point, maximum heating extraction flow operating point and middle heating extraction flow operating point, middle heating extraction flow operating point;
(2) can under the prerequisite of safe operation, determine to test boundary condition at guarantee unit; The boundary condition determined comprises:
1. main steam and reheated steam parameter, main steam and reheated steam parameter are the ratings that steam quality meets regulation requirement;
2. train unit system is run;
3. all heat regenerative system is normally run;
4. ensure heating extraction flow parameter request, comprising: middle row's pressure minimum and middle row's temperature maximum;
5. ensure the minimum admission flow of low pressure (LP) cylinder, namely ensure the minimum aperture of heating extraction control valve, ensure low pressure (LP) cylinder initial steam pressure minimum value;
6. ensure that steam turbine is to maximum admission flow value;
(3) operating condition of test is to test heating flow for benchmark, maintains specified heating extraction flow parameter, changes unit generation load by the evaporation capacity changing boiler, at each extraction flow operating point, determines two unit height limited load operating points respectively;
Wherein, in process of the test, with each extraction flow operating point for benchmark, when changing the evaporation capacity of boiler, comprise following three kinds of situations:
1., when main steam flow is increased to the maximum admission flow value of steam turbine, being defined as this heating extraction flow operating point is high limited load operating mode;
2. when main steam flow is reduced to middle row pressure power close to minimum value, and middle row's temperature not overtemperature or heating extraction regulation valve opening close to minimum aperture or low pressure (LP) cylinder initial steam pressure close to minimum value time, being defined as this heating extraction flow operating point is lower bound load condition;
3. when main steam flow is increased to the maximum admission flow value of steam turbine, and middle row pressure power close to minimum value and middle row's temperature not overtemperature or heating extraction regulation valve opening close to minimum aperture or low pressure (LP) cylinder initial steam pressure close to minimum value time, be defined as maximum heating extraction flow operating point, the high limited load operating mode of this point overlaps as a bit with lower bound load condition;
(4) record each operating condition of test experimental tests parameter, form original experiment data; The test parameters of record comprises: unit load, main steam flow, heating extraction flow, main vapour pressure, Stream temperature degree, high row pressure power, high consistency tower, middle row pressure power, middle row's temperature, heating extraction regulation valve opening, low pressure (LP) cylinder initial steam pressure, heat supply network circulating water flow, heating well heater initial steam pressure, heating well heater throttle (steam) temperature, heat supply network recirculated water supply water temperature, heat supply network recirculated water return water temperature and heating are drawn gas drain temperature;
(5) unit generation load and heating extraction flow relation are carried out curve fitting, draw the adjustable range of unit generation load under different heating extraction flow operating mode.
And choosing of heating extraction flow operating point should make whole heating extraction flow operating point be evenly distributed in the middle of in described step (1).
And the recording method of described step (4) record test parameters is: stablize 30 minutes at corresponding operating point, record 30 minutes, logging interval is carried out for 5 minutes.
And, when described step (5) carries out curve fitting to unit generation load and heating extraction flow relation, curve adopts function plotting software to carry out matching, comprise and respectively matching is carried out to high limited load corresponding to all heating extraction flow operating points and low limited load, draw unit generation load adjustable range under different heating extraction flow operating mode.
Advantage of the present invention and good effect are:
The inventive method can at cogeneration units heating period electricity determining by heat in the winter time, when peak modulation capacity declines thereupon, Appropriate application cogeneration units electric load peak modulation capacity, not only be conducive to completing regional balance of electric power and ener when installed capacity is limited, Effective Regulation interconnection, also can significantly improve the business efficiency of Utilities Electric Co.'s system cloud gray model and operation.
Embodiment
Be further described the invention process below, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
Test an experimental technique for cogeneration units heat supply phase electric load adjustment capability, comprise step as follows:
(1), according to test unit design heating extraction flow parameter, choose unit different heating extraction flow operating point respectively;
Wherein, choosing of heating extraction flow, at least comprise three operating points, be specially minimum heating extraction flow operating point, maximum heating extraction flow operating point and middle heating extraction flow operating point, choosing of middle heating extraction flow operating point should make whole heating extraction flow operating point be evenly distributed;
(2) can under the prerequisite of safe operation, determine to test boundary condition at guarantee unit;
Wherein, the boundary condition determined comprises:
1. main steam and reheated steam parameter, main steam and reheated steam parameter are the ratings that steam quality meets regulation requirement;
2. train unit system is run;
3. all heat regenerative system is normally run;
4. ensure heating extraction flow parameter request, comprising: middle row's pressure minimum and middle row's temperature maximum;
5. ensure the minimum admission flow of low pressure (LP) cylinder, namely ensure the minimum aperture of heating extraction control valve, ensure low pressure (LP) cylinder initial steam pressure minimum value;
6. ensure that steam turbine is to maximum admission flow value;
(3) operating condition of test is to test heating flow for benchmark, maintains specified heating extraction flow parameter, changes unit generation load by the evaporation capacity changing boiler, at each extraction flow operating point, determines two unit height limited load operating points respectively;
Wherein, in process of the test, with each extraction flow operating point for benchmark, when changing the evaporation capacity of boiler, comprise following three kinds of situations:
1., when main steam flow is increased to the maximum admission flow value of steam turbine, being defined as this heating extraction flow operating point is high limited load operating mode;
2. when main steam flow is reduced to middle row pressure power close to minimum value, and middle row's temperature not overtemperature or heating extraction regulation valve opening close to minimum aperture or low pressure (LP) cylinder initial steam pressure close to minimum value time, being defined as this heating extraction flow operating point is lower bound load condition;
3. when main steam flow is increased to the maximum admission flow value of steam turbine, and middle row pressure power close to minimum value and middle row's temperature not overtemperature or heating extraction regulation valve opening close to minimum aperture or low pressure (LP) cylinder initial steam pressure close to minimum value time, be defined as maximum heating extraction flow operating point, the high limited load operating mode of this point overlaps as a bit with lower bound load condition.
(4) record each operating condition of test experimental tests parameter, form original experiment data;
Wherein, the test parameters that need record comprises: unit load, main steam flow, heating extraction flow, main vapour pressure, Stream temperature degree, high row pressure power, high consistency tower, middle row pressure power, middle row's temperature, heating extraction regulation valve opening, low pressure (LP) cylinder initial steam pressure, heat supply network circulating water flow, heating well heater initial steam pressure, heating well heater throttle (steam) temperature, heat supply network recirculated water supply water temperature, heat supply network recirculated water return water temperature and heating are drawn gas drain temperature.
Recording method is: stablize 30 minutes at corresponding operating point, and record 30 minutes, logging interval is carried out for 5 minutes.
(5) unit generation load and heating extraction flow relation are carried out curve fitting, draw the adjustable range of unit generation load under different heating extraction flow operating mode.
Wherein, when unit generation load and heating extraction flow relation are carried out curve fitting, curve adopts function plotting software to carry out matching, comprise and respectively matching is carried out to high limited load corresponding to all heating extraction flow operating points and low limited load, draw unit generation load adjustable range under different heating extraction flow operating mode.
Claims (4)
1. test an experimental technique for cogeneration units heat supply phase electric load adjustment capability, it is characterized in that comprising step as follows:
(1), according to the test unit determined, choose the different heating extraction flow operating points of test unit respectively;
Wherein, choosing of heating extraction flow operating point at least comprises three operating points, is specially minimum heating extraction flow operating point, maximum heating extraction flow operating point and middle heating extraction flow operating point;
(2) can under the prerequisite of safe operation, determine to test boundary condition at guarantee unit; The boundary condition determined comprises:
1. main steam and reheated steam parameter, main steam and reheated steam parameter are the ratings that steam quality meets regulation requirement;
2. train unit system is run;
3. all heat regenerative system is normally run;
4. ensure heating extraction flow parameter request, comprising: middle row's pressure minimum and middle row's temperature maximum;
5. ensure the minimum admission flow of low pressure (LP) cylinder, namely ensure the minimum aperture of heating extraction control valve, ensure low pressure (LP) cylinder initial steam pressure minimum value;
6. ensure that steam turbine is to maximum admission flow value;
(3) operating condition of test is to test heating flow for benchmark, maintains specified heating extraction flow parameter, changes unit generation load by the evaporation capacity changing boiler, at each extraction flow operating point, determines two unit height limited load operating points respectively;
Wherein, in process of the test, with each extraction flow operating point for benchmark, when changing the evaporation capacity of boiler, comprise following three kinds of situations:
1., when main steam flow is increased to the maximum admission flow value of steam turbine, being defined as this heating extraction flow operating point is high limited load operating mode;
2. when main steam flow is reduced to middle row pressure power close to minimum value, and middle row's temperature not overtemperature or heating extraction regulation valve opening close to minimum aperture or low pressure (LP) cylinder initial steam pressure close to minimum value time, being defined as this heating extraction flow operating point is lower bound load condition;
3. when main steam flow is increased to the maximum admission flow value of steam turbine, and middle row pressure power close to minimum value and middle row's temperature not overtemperature or heating extraction regulation valve opening close to minimum aperture or low pressure (LP) cylinder initial steam pressure close to minimum value time, be defined as maximum heating extraction flow operating point, the high limited load operating mode of this point overlaps as a bit with lower bound load condition;
(4) record each operating condition of test experimental tests parameter, form original experiment data; The test parameters of record comprises: unit load, main steam flow, heating extraction flow, main vapour pressure, Stream temperature degree, high row pressure power, high consistency tower, middle row pressure power, middle row's temperature, heating extraction regulation valve opening, low pressure (LP) cylinder initial steam pressure, heat supply network circulating water flow, heating well heater initial steam pressure, heating well heater throttle (steam) temperature, heat supply network recirculated water supply water temperature, heat supply network recirculated water return water temperature and heating are drawn gas drain temperature;
(5) unit generation load and heating extraction flow relation are carried out curve fitting, draw the adjustable range of unit generation load under different heating extraction flow operating mode.
2. the experimental technique of test cogeneration units heat supply phase electric load adjustment capability according to claim 1, is characterized in that: in the middle of in described step (1), choosing of heating extraction flow operating point should make whole heating extraction flow operating point be evenly distributed.
3. the experimental technique of test cogeneration units heat supply phase electric load adjustment capability according to claim 1, it is characterized in that: the recording method of described step (4) record test parameters is: stablize 30 minutes at corresponding operating point, record 30 minutes, logging interval is carried out for 5 minutes.
4. the experimental technique of test cogeneration units heat supply phase electric load adjustment capability according to claim 1, it is characterized in that: when described step (5) carries out curve fitting to unit generation load and heating extraction flow relation, curve adopts function plotting software to carry out matching, comprise and respectively matching is carried out to high limited load corresponding to all heating extraction flow operating points and low limited load, draw unit generation load adjustable range under different heating extraction flow operating mode.
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| CN110659803A (en) * | 2019-08-26 | 2020-01-07 | 国网天津市电力公司电力科学研究院 | Method for calculating peak regulation capacity and heat supply capacity improvement effect of cogeneration unit based on zero output of low-pressure cylinder |
| CN111738564A (en) * | 2020-05-29 | 2020-10-02 | 国网天津市电力公司电力科学研究院 | Coal-fired unit power generation load scheduling range online monitoring and judging device and method |
| CN112231908A (en) * | 2020-10-15 | 2021-01-15 | 山东电力研究院 | Method for determining upper and lower load limits corresponding to extraction flow of extraction condensing unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108319131A (en) * | 2017-12-27 | 2018-07-24 | 国网山东省电力公司电力科学研究院 | Peak load regulation capability assessment method based on data mining |
| CN109447840A (en) * | 2018-09-30 | 2019-03-08 | 国网天津市电力公司电力科学研究院 | A kind of determination method of cogeneration units in heat supply period electric load adjustable extent |
| CN110659803A (en) * | 2019-08-26 | 2020-01-07 | 国网天津市电力公司电力科学研究院 | Method for calculating peak regulation capacity and heat supply capacity improvement effect of cogeneration unit based on zero output of low-pressure cylinder |
| CN111738564A (en) * | 2020-05-29 | 2020-10-02 | 国网天津市电力公司电力科学研究院 | Coal-fired unit power generation load scheduling range online monitoring and judging device and method |
| CN112231908A (en) * | 2020-10-15 | 2021-01-15 | 山东电力研究院 | Method for determining upper and lower load limits corresponding to extraction flow of extraction condensing unit |
| CN112231908B (en) * | 2020-10-15 | 2023-03-21 | 国网山东省电力公司电力科学研究院 | Method for determining upper and lower load limits corresponding to extraction flow of extraction condensing unit |
| CN112507534A (en) * | 2020-11-25 | 2021-03-16 | 山东电力研究院 | Conversion method and system for power supply coal consumption rate of cogeneration unit in heat supply period |
| CN112507534B (en) * | 2020-11-25 | 2022-07-19 | 国网山东省电力公司电力科学研究院 | Conversion method and system for power supply coal consumption rate of cogeneration unit in heat supply period |
| CN112709609A (en) * | 2020-12-15 | 2021-04-27 | 广西电网有限责任公司电力科学研究院 | Method for obtaining electric power range through heat supply flow |
| CN112709609B (en) * | 2020-12-15 | 2023-06-13 | 广西电网有限责任公司电力科学研究院 | Method for obtaining electric power range by heat supply flow |
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