A thermal power generation system and a regulation method

Abstract

The present invention relates to the technical field of thermal power generation, and specifically relates to a thermal power generation system and an adjustment method. The thermal power generation system includes: a boiler and a steam turbine connected and arranged, and the steam turbine is further connected to a generator set; the adjustment device includes a valve assembly and a feed water heating assembly connected to the steam extraction end of the steam turbine; the adjustment method includes: monitoring the frequency of the generator set connected to the power grid; when the frequency is greater than a first preset value, increasing the opening degree of the valve assembly, increasing the steam extraction amount, reducing the exhaust steam amount of the steam turbine, and reducing the frequency; when the frequency is less than a second preset value, reducing the opening degree of the valve assembly, reducing the steam extraction amount, increasing the exhaust steam amount of the steam turbine, and increasing the frequency. The present application controls the steam extraction amount of the steam turbine by adjusting the opening degree of the valve assembly, changes the rotational speed of the steam turbine, and then quickly and effectively adjusts the frequency of the power grid of the thermal power generation system connected to large-scale intermittent energy sources to maintain the frequency stability of the power grid.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and particularly to a thermal power generation system and an adjustment method. Background Art

[0002] Renewable energy refers to energy whose raw materials can be regenerated, such as hydropower, wind power, solar energy, bioenergy (biogas), geothermal energy (including geothermal and water sources), and tidal energy. However, the above-mentioned renewable energy is intermittent energy, with strong volatility and randomness, resulting in the uncertainty of the output of energy power stations. For the power grid system, the access of large-scale intermittent energy is difficult to frequency modulate the power grid system. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that it is difficult to frequency modulate power stations accessing large-scale intermittent energy in the prior art. Based on the above situation, it is very necessary to develop a thermal power generation system for frequency modulating power stations accessing large-scale intermittent energy.

[0004] To achieve the above object, the present invention provides a thermal power generation system, including:

[0005] A boiler and a steam turbine connected and arranged, and the steam turbine is further connected with a generator set;

[0006] An adjustment device, including a valve assembly connected to the extraction end of the steam turbine and a feed water heating assembly connected to the valve assembly, and the outlet of the feed water heating assembly is connected to the boiler.

[0007] Optionally, the feed water heater assembly includes: a first feed water heater and a second feed water heater connected to each other;

[0008] The valve assembly includes: a second valve, a third valve, a fourth valve, and an ejector; one ends of the second valve and the fourth valve are both connected to an extraction end of the steam turbine, and one end of the third valve is connected to another extraction end of the steam turbine; and the other ends of the second valve and the third valve are both connected to the steam inlet end of the ejector, the other end of the fourth valve is connected to the first feed water heater, and the steam outlet end of the ejector is connected to the second feed water heater.

[0009] Optionally, the steam turbine includes a first steam cylinder and a second steam cylinder arranged non-coaxially; a regenerative steam turbine is further connected between the two-stage extraction ends of the first steam cylinder, and a set of adjustment devices are respectively connected to the two-stage extraction ends of the first steam cylinder, the second steam cylinder, and the regenerative steam turbine, and the first steam cylinder, the second steam cylinder, and the regenerative steam turbine are further respectively connected to a second generator, a first generator, and a third generator, and the first generator, the second generator, and the third generator are all connected to the power grid.

[0010] Optionally, both the first steam cylinder and the second generator are arranged at a high position; the second steam cylinder, the regenerative steam turbine, and the first generator are all arranged at a low position.

[0011] Optionally, the high-position arrangement is at a position 50 - 75 m above the ground; the low-position arrangement is at a position 10 - 20 m above the ground.

[0012] Optionally, it further includes:

[0013] A condenser, connected to the second steam cylinder;

[0014] A condensate pump, with one end connected to the condenser and the other end connected to the boiler through an adjusting device.

[0015] Optionally, it further includes: a regenerative heater arranged between the condensate pump and the adjusting device.

[0016] Optionally, it further includes: a reheater arranged between the first steam cylinder and the second steam cylinder.

[0017] The present invention also provides a regulation method for a thermal power generation system, for regulating the said thermal power generation system, including:

[0018] Monitoring the frequency at the connection point of the generator set to the power grid;

[0019] When the frequency is greater than a first preset value, increasing the opening degree of the valve assembly and increasing the extraction steam amount to reduce the exhaust steam amount of the steam turbine and lower the frequency; when the frequency is less than a second preset value, reducing the opening degree of the valve assembly and reducing the extraction steam amount to increase the exhaust steam amount of the steam turbine and raise the frequency.

[0020] The present invention also provides a regulation method for a thermal power generation system, for regulating the said thermal power generation system, including:

[0021] Monitoring the frequency at the connection point of the generator set to the power grid;

[0022] When the frequency is greater than a first preset value, opening the second valve, the third valve, and the fourth valve, and increasing the opening degrees of the second valve, the third valve, and the fourth valve, increasing the extraction steam amount of the adjusting device, reducing the exhaust steam amounts of the first steam cylinder, the second steam cylinder, and the regenerative steam turbine, and lowering the frequency; when the frequency is less than a second preset value, with the second valve, the third valve, and the fourth valve all open, reducing the opening degrees of the second valve, the third valve, and the fourth valve, reducing the extraction steam amount of the adjusting device, increasing the exhaust steam amounts of the first steam cylinder, the second steam cylinder, and the regenerative steam turbine, and raising the frequency.

[0023] The above technical solutions of the present invention have the following advantages compared with the prior art:

[0024] 1. The thermal power generation system provided by the present invention includes: a boiler and a steam turbine connected and arranged, and the steam turbine is further connected to a generator set; a regulating device, including a valve assembly connected to the extraction end of the steam turbine and a feedwater heating assembly connected to the valve assembly, and the outlet of the feedwater heating assembly is connected to the boiler; by adopting the above technical solution, the extraction steam amount of the steam turbine is controlled through the valve assembly and the feedwater heating assembly, the rotational speed of the steam turbine is changed, and then the power grid of the thermal power generation system connected to a large-scale intermittent energy source is quickly and effectively frequency-regulated to maintain the frequency stability of the power grid.

[0025] 2. The feedwater heater assembly of the present invention includes: a first feedwater heater and a second feedwater heater connected to each other; the valve assembly includes: a second valve, a third valve, a fourth valve, and an ejector; one ends of the second valve and the fourth valve are both connected to an extraction end of the steam turbine, and one end of the third valve is connected to another extraction end of the steam turbine; and the other ends of the second valve and the third valve are both connected to the steam inlet end of the ejector, the other end of the fourth valve is connected to the first feedwater heater, and the steam outlet end of the ejector is connected to the second feedwater heater; by adopting the above technical solution, by setting the ejector, the pressures of the two-stage extraction steam are adjusted simultaneously, and the adjustment ability of the regulating device is effectively improved.

[0026] 3. The steam turbine of the present invention includes a first steam cylinder and a second steam cylinder arranged non-coaxially; a regenerative steam turbine is further connected between the two-stage extraction ends of the first steam cylinder, and a set of regulating devices are respectively connected to the two-stage extraction ends of the first steam cylinder, the second steam cylinder, and the regenerative steam turbine, and the first steam cylinder, the second steam cylinder, and the regenerative steam turbine are further respectively connected to a second generator, a first generator, and a third generator, and the first generator, the second generator, and the third generator are all connected to the power grid; by adopting the above technical solution, by respectively connecting regulating devices to the first steam cylinder, the second steam cylinder, and the regenerative steam turbine, the extraction steam amounts of the first steam cylinder, the second steam cylinder, and the regenerative steam turbine are adjusted, and then the exhaust steam amounts of the first steam cylinder, the second steam cylinder, and the regenerative steam turbine are affected, the rotational speeds of the first steam cylinder, the second steam cylinder, and the regenerative steam turbine are changed, and the frequencies at which the first generator, the second generator, and the third generator are connected to the power grid are changed, so as to quickly frequency-regulate and maintain the frequency stability of the power grid connected to a large-scale intermittent energy source.

[0027] 4. The first steam cylinder and the second generator of the present invention are both arranged at a high position; the second steam cylinder, the regenerative steam turbine, and the first generator are all arranged at a low position; by adopting the above technical solution, when the steam of the first steam cylinder enters the second steam cylinder and the regenerative steam turbine, the pressure loss and heat loss generated by the connecting pipeline are reduced.

[0028] 5. The high-level arrangement in the present invention is at a position 50 - 75 m above the ground; the low-level arrangement is at a position 10 - 20 m above the ground. By adopting the above technical solution, the present application specifically defines the heights of the high-level and low-level arrangements to ensure that when the steam of the first steam cylinder enters the second steam cylinder and the regenerative steam turbine, the pressure loss and heat loss generated by the connecting pipelines are reduced.

[0029] 6. The thermal power generation system provided by the present invention further includes: a condenser connected to the second steam cylinder; a condensate pump, one end of which is connected to the condenser and the other end is connected to the boiler through an adjustment device. By adopting the above technical solution, the present application connects the second steam cylinder to the condenser, so that the steam utilized by the second steam cylinder becomes condensate water after being condensed by the condenser, and then is heated by the adjustment device and circulated to the boiler, achieving the purpose of saving water resources and reducing costs.

[0030] 7. The thermal power generation system provided by the present invention further includes: a regenerative heater arranged between the condensate pump and the adjustment device. By adopting the above technical solution, the present application heats the feed water flowing through by arranging the regenerative heater, improves the temperature of the feed water flowing back to the boiler, and improves the work efficiency.

[0031] 8. The thermal power generation system provided by the present invention further includes: a reheater arranged between the first steam cylinder and the second steam cylinder. By adopting the above technical solution, the present application reheats the steam utilized by the first steam cylinder through the arrangement of the reheater to increase the temperature, and then enters the second steam cylinder to improve the work efficiency of the second steam cylinder.

[0032] 9. The adjustment method of the thermal power generation system provided by the present invention adjusts the thermal power generation system, including: monitoring the frequency at the connection of the generator set to the power grid; when the frequency is greater than the first preset value, increasing the opening of the valve assembly and increasing the extraction steam volume to reduce the exhaust steam volume of the steam turbine and lower the frequency; when the frequency is less than the second preset value, reducing the opening of the valve assembly and reducing the extraction steam volume to increase the exhaust steam volume of the steam turbine and raise the frequency. By adopting the above technical solution, the present application controls the extraction steam volume of the steam turbine by adjusting the opening of the valve assembly, changes the rotational speed of the steam turbine, and then quickly and effectively adjusts the frequency of the power grid of the thermal power generation system connected to large-scale intermittent energy sources to maintain the frequency stability of the power grid.

[0033] 10. The adjustment method of the thermal power generation system provided by the present invention adjusts the thermal power generation system, including: monitoring the frequency at the connection of the generator set to the power grid; when the frequency is greater than the first preset value, opening the second valve, the third valve and the fourth valve, and increasing the valve openings of the second valve, the third valve and the fourth valve, increasing the extraction steam amount of the adjustment device, reducing the exhaust steam amounts of the first steam cylinder, the second steam cylinder and the regenerative steam turbine, and reducing the frequency; when the frequency is less than the second preset value, under the state where the second valve, the third valve and the fourth valve are open, reducing the openings of the second valve, the third valve and the fourth valve, reducing the extraction steam amount of the adjustment device, increasing the exhaust steam amounts of the first steam cylinder, the second steam cylinder and the regenerative steam turbine, and increasing the frequency; by adopting the above technical solution, the present application changes the extraction steam amount by adjusting the openings of the second valve, the third valve and the fourth valve, so as to adjust the exhaust steam amounts of the first steam cylinder, the second steam cylinder and the regenerative steam turbine, and further affects the output powers of the first generator, the second generator and the third generator, making the frequencies at the connections of the first generator, the second generator and the third generator to the power grid stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 It is a schematic connection structure diagram of the adjustment device provided in the embodiment of the present invention;

[0036] Figure 2 It is a schematic connection structure diagram of the thermal power generation system provided in the embodiment of the present invention.

[0037] Description of the reference numerals:

[0038] 1. First valve; 2. Second valve; 3. Third valve; 4. Injector; 5. First feedwater heater; 6. Second feedwater heater; 7. Third feedwater heater; 8. Boiler; 9. First steam cylinder; 10. Reheater; 11. Second steam cylinder; 12. Regenerative steam turbine; 13. Condenser; 14. Condensate pump; 15. First generator; 16. Second generator; 17. Regenerative heater; 18. Third generator; 19. First pipeline; 20. Second pipeline; 21. Third pipeline; 22. Fourth valve; 23. First adjustment device; 24. Second adjustment device; 25. Third adjustment device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] As Figures 1 to 2 A specific embodiment of the thermal power generation system shown is suitable for frequency modulation of a power station accessing large-scale intermittent energy sources, and includes: a boiler 8, a first steam cylinder 9, a reheater 10, a second steam cylinder 11, a condenser 13, a condensate pump 14, a regenerative heater 17, and three groups of regulating devices connected in sequence, and a regenerative steam turbine 12 connected to the first steam cylinder 9, etc.

[0044] As Figure 1As shown, each set of regulating devices includes a valve assembly and a feed water heating assembly connected to the valve assembly. The feed water heater assembly includes: a first feed water heater 5, a second feed water heater 6, and a third feed water heater 7 connected in sequence; the valve assembly includes: a first valve 1, a second valve 2, a third valve 3, a fourth valve 22, and an ejector 4; one ends of the first valve 1, the second valve 2, and the fourth valve 22 are all connected to a steam extraction end through a first pipeline 19, and one end of the third valve 3 is connected to another steam extraction end through a second pipeline 20; and the other ends of the second valve 2 and the third valve 3 are both connected to the steam inlet end of the ejector 4, the other end of the fourth valve 22 is connected to the first feed water heater 5, the steam outlet end of the ejector 4 is connected to the second feed water heater 6; the other end of the first valve 1 is connected to the third feed water heater 7 through a third pipeline 21. The steam outlet end of the third feed water heater 7 is connected to the second feed water heater 6, and the steam outlet end of the second feed water heater 6 is connected to the first feed water heater 5.

[0045] As Figure 2 As shown, a regenerative steam turbine 12 is connected between the two-stage steam extraction ends of the first steam cylinder 9. A set of regulating devices is respectively connected to the two-stage steam extraction ends of the first steam cylinder 9, the second steam cylinder 11, and the regenerative steam turbine 12. Specifically, the two-stage steam extraction ends of the first steam cylinder 9 are connected to a third regulating device 25; the two-stage steam extraction ends of the second steam cylinder 11 are connected to a first regulating device 23; the two-stage steam extraction ends of the regenerative steam turbine 12 are connected to a second regulating device 24. And the first steam cylinder 9, the second steam cylinder 11, and the regenerative steam turbine 12 are also respectively connected to a second generator 16, a first generator 15, and a third generator 18, and are coaxially arranged respectively; the first generator 15, the second generator 16, and the third generator 18 are all connected to the power grid. Specifically, the first steam cylinder 9 is a high-pressure cylinder, and the second steam cylinder 11 is a medium-low pressure cylinder. The first steam cylinder 9 and the second generator 16 are both arranged at a high position; the second steam cylinder 11, the regenerative steam turbine 12, and the first generator 15 are all arranged at a low position. The high position is at a position 50 - 75 m above the ground; the low position is at a position 10 - 20 m above the ground. The regenerative heater 17 is connected to the third steam extraction end of the second steam cylinder 11 and is also connected to the first regulating device 23; the third regulating device 25 is connected to the boiler 8. The steam outlet end of the regenerative heater 17 is connected to the steam inlet end of the condenser 13. Further, the third generator 18 is connected to a feed water pump; the feed water pump is connected to a deaerator to pressurize the feed water at the outlet of the deaerator; the third generator 18 is a frequency modulation motor to adjust the speed of the feed water pump, and thus adjust the flow rate of the feed water at the outlet of the deaerator.

[0046] The present invention also provides a regulation method for a thermal power generation system, which regulates the thermal power generation system and includes: monitoring the frequency at the connection point of the generator set to the power grid; when the frequency is greater than a first preset value, increasing the opening degree of the valve assembly to increase the extraction steam volume, so as to reduce the exhaust steam volume of the steam turbine and lower the frequency; when the frequency is less than a second preset value, reducing the opening degree of the valve assembly to reduce the extraction steam volume, so as to increase the exhaust steam volume of the steam turbine and raise the frequency.

[0047] The present invention also provides a regulation method for a thermal power generation system, which regulates the thermal power generation system and includes: monitoring the frequency at the connection point of the generator set to the power grid; when the frequency is greater than a first preset value, closing the first valve 1, opening the second valve 2, the third valve 3 and the fourth valve 22, and increasing the valve opening degrees of the second valve 2, the third valve 3 and the fourth valve 22, increasing the extraction steam volume of the regulating device, reducing the exhaust steam volumes of the first steam cylinder 9, the second steam cylinder 11 and the regenerative steam turbine 12, and lowering the frequency;

[0048] when the frequency is less than a second preset value, closing the first valve 1, and when the second valve 2, the third valve 3 and the fourth valve 22 are all open, reducing the opening degrees of the second valve 2, the third valve 3 and the fourth valve 22, reducing the extraction steam volume of the regulating device, increasing the exhaust steam volumes of the first steam cylinder 9, the second steam cylinder 11 and the regenerative steam turbine 12, and raising the frequency.

[0049] The working principle process of the thermal power generation system described in the present application is briefly described as follows: The steam from the boiler 8 enters the first steam cylinder 9, and the steam drives the blades to rotate in the first steam cylinder 9, driving the second generator 16 arranged at a high position to generate electricity; the steam used by the first steam cylinder 9 enters the reheater 10 for reheating to form reheated steam, which is input into the second steam cylinder 11, and the steam drives the blades to rotate in the second steam cylinder 11, driving the first generator 15 to generate electricity; the steam used by the second steam cylinder 11 enters the condenser 13 and condenses into condensate; the condensate is sent to the regenerative heater 17 for heating by the condensate pump 14, and then input into the first regulating device 23, the second regulating device 24 and the third regulating device 25 connected in series in sequence, and the water in the third regulating device 25 finally circulates and flows into the boiler 8; the condensate passing through the first regulating device 23, the second regulating device 24 and the third regulating device 25 is also heated by the steam taken from the extraction end; the steam used by the first regulating device 23, the second regulating device 24, the third regulating device 25 and the regenerative heater 17 is sent into the condenser 13 and condenses into condensate. The two-stage extraction steam of the first steam cylinder 9 enters the regenerative steam turbine 12, and the steam drives the blades to rotate in the regenerative steam turbine 12, driving the third generator 18 arranged at a low position to generate electricity; the two-stage extraction steam of the first steam cylinder 9 also enters the third regulating device 25; the two-stage extraction steam of the second steam cylinder 11 enters the second regulating device 24; the two-stage extraction steam of the regenerative steam turbine 12 enters the first regulating device 23.

[0050] Monitor the frequency at the connection of the generator set to the power grid; when the frequency is greater than the first preset value, close the first valve 1, open the second valve 2, the third valve 3 and the fourth valve 22, and increase the valve openings of the second valve 2, the third valve 3 and the fourth valve 22, increase the extraction steam volume of the regulating device, reduce the exhaust steam volumes of the first steam cylinder 9, the second steam cylinder 11 and the regenerative steam turbine 12, and lower the frequency; when the frequency is less than the second preset value, close the first valve 1, and with the second valve 2, the third valve 3 and the fourth valve 22 open, reduce the valve openings of the second valve 2, the third valve 3 and the fourth valve 22, reduce the extraction steam volume of the regulating device, increase the exhaust steam volumes of the first steam cylinder 9, the second steam cylinder 11 and the regenerative steam turbine 12, and raise the frequency.

[0051] As an alternative embodiment, in the regulating device, remove the third feedwater heater 7, the first valve 1 and the third pipe 21.

[0052] As an alternative embodiment, when the frequency is greater than the first preset value, replace closing the first valve 1, opening the second valve 2, the third valve 3 and the fourth valve 22, and increasing the valve openings of the second valve 2, the third valve 3 and the fourth valve 22 with closing the fourth valve 22, opening the first valve 1, the second valve 2 and the third valve 3, and increasing the valve openings of the first valve 1, the second valve 2 and the third valve 3.

[0053] As an alternative embodiment, when the frequency is less than the second preset value, replace closing the first valve 1 and reducing the valve openings of the second valve 2, the third valve 3 and the fourth valve 22 with the second valve 2, the third valve 3 and the fourth valve 22 all open with closing the fourth valve 22 and reducing the valve openings of the first valve 1, the second valve 2 and the third valve 3 with the first valve 1, the second valve 2 and the third valve 3 all open.

[0054] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A regulation method for a thermal power generation system, which regulates the thermal power generation system, and is characterized in that the thermal power generation system includes: a boiler (8) and a steam turbine connected and arranged, and the steam turbine is further connected with a generator set; a regulating device, including a valve assembly connected to the extraction end of the steam turbine and a feed water heating assembly connected to the valve assembly, and the outlet of the feed water heating assembly is connected to the boiler (8); the feed water heater assembly includes: a first feed water heater (5) and a second feed water heater (6) connected to each other; the valve assembly includes: a second valve (2), a third valve (3), a fourth valve (22) and an ejector (4); one ends of the second valve (2) and the fourth valve (22) are both connected to an extraction end of the steam turbine, and one end of the third valve (3) is connected to another extraction end of the steam turbine; and the other ends of the second valve (2) and the third valve (3) are both connected to the steam inlet end of the ejector (4), the other end of the fourth valve (22) is connected to the first feed water heater (5), and the steam outlet end of the ejector (4) is connected to the second feed water heater (6); the steam turbine includes a first steam cylinder (9) and a second steam cylinder (11) arranged non-coaxially; a regenerative steam turbine (12) is further connected between the two-stage extraction ends of the first steam cylinder (9), and a set of regulating devices are respectively connected to the two-stage extraction ends of the first steam cylinder (9), the second steam cylinder (11), and the regenerative steam turbine (12), and the first steam cylinder (9), the second steam cylinder (11), and the regenerative steam turbine (12) are also respectively connected to a second generator (16), a first generator (15), and a third generator (18), and the first generator (15), the second generator (16), and the third generator (18) are all connected to the power grid; the regulation method of the thermal power generation system includes: monitoring the frequency at the connection of the generator set to the power grid; when the frequency is greater than a first preset value, open the second valve (2), the third valve (3), and the fourth valve (22), and increase the valve openings of the second valve (2), the third valve (3), and the fourth valve (22), increase the extraction steam amount of the regulating device, reduce the exhaust steam amounts of the first steam cylinder (9), the second steam cylinder (11), and the regenerative steam turbine (12), and reduce the frequency; when the frequency is less than a second preset value, under the state that the second valve (2), the third valve (3), and the fourth valve (22) are all open, reduce the openings of the second valve (2), the third valve (3), and the fourth valve (22), reduce the extraction steam amount of the regulating device, increase the exhaust steam amounts of the first steam cylinder (9), the second steam cylinder (11), and the regenerative steam turbine (12), and increase the frequency.

2. The adjustment method of the thermal power generation system according to claim 1, characterized in that Both the first steam cylinder (9) and the second generator (16) are arranged at a high position; both the second steam cylinder (11), the regenerative steam turbine (12), and the first generator (15) are arranged at a low position.

3. The adjustment method of the thermal power generation system according to claim 2, characterized in that The high position arrangement is at a position 50 - 75 m above the ground; the low position arrangement is at a position 10 - 20 m above the ground.

4. The adjustment method of the thermal power generation system according to any one of claims 1-3, characterized in that, The thermal power generation system further includes: A condenser (13), connected to the second steam pressure cylinder (11); A condensate pump (14), one end of which is connected to the condenser (13), and the other end is connected to the boiler (8) through an adjusting device.

5. The adjustment method of the thermal power generation system according to claim 4, characterized in that, The thermal power generation system further includes: a regenerative heater (17) disposed between the condensate pump (14) and the adjusting device.

6. The adjustment method of the thermal power generation system according to any one of claims 1-3, characterized in that, The thermal power generation system further includes: a reheater (10) disposed between the first steam pressure cylinder (9) and the second steam pressure cylinder (11).

Images