Supercritical carbon dioxide cycle power generation system and thermal-electric decoupling operation method thereof

Abstract

This invention discloses a supercritical carbon dioxide cycle power generation system and its thermoelectric decoupling operation method. The cold-side outlet of the regenerator is connected to the boiler inlet, the boiler outlet is connected to the gas inlet side of the carbon dioxide generator, the exhaust side of the carbon dioxide generator is connected to the hot-side inlet of the regenerator, the hot-side outlet of the regenerator is connected to the inlet of the cooler, the outlet of the cooler is connected to the inlet of the gas storage tank, the outlet of the gas storage tank is connected to the inlet of the compressor, and the outlet of the compressor is connected to the inlet of the gas storage tank. The turbine inlet of the carbon dioxide generator is connected to the turbine outlet of the carbon dioxide generator. The hot-side outlet of the regenerator is connected to the inlet of the heating network gas pump, the outlet of the heating network gas pump is connected to the inlet of the auxiliary gas heat exchanger, and the outlet of the auxiliary gas heat exchanger is connected to the inlet of the main system cooler. This system and method can flexibly adjust the power generation and heat supply according to the grid demand and heat load changes.

Description

Technical Field

[0001] This invention belongs to the field of supercritical carbon dioxide cycle power generation technology, and relates to a supercritical carbon dioxide cycle power generation system and its thermoelectric decoupling operation method. Background Technology

[0002] Centralized heating has a long history in northern China. However, as a common type of thermal power plant, the traditional "heat-driven power generation" model greatly restricts the existing systems at both ends of the power plant's heating and power supply. It is usually difficult to achieve effective decoupling of heat energy and electrical energy, which limits the system's adaptability and efficiency under different operating conditions.

[0003] Supercritical carbon dioxide cycle power generation systems have attracted attention due to their high efficiency and compact equipment layout; however, their excellent peak-shaving capabilities and flexible thermoelectric decoupling capabilities in heating have long been overlooked. There is significant potential for development in the construction, commissioning, and operation of related systems. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a supercritical carbon dioxide cycle power generation system and its thermoelectric decoupling operation method. This system and method can flexibly adjust the power generation and heat supply according to grid demand and heat load changes.

[0005] To achieve the above objectives, the present invention discloses a supercritical carbon dioxide cycle power generation system, including a compressor, a regenerator, a boiler, a carbon dioxide generator, a cooler, a gas storage tank, a heating network gas pump, and an auxiliary gas heat exchanger.

[0006] The compressor outlet is connected to the cold-side inlet of the regenerator, the cold-side outlet of the regenerator is connected to the boiler inlet, the boiler outlet is connected to the intake side of the CO2 generator, the exhaust side of the CO2 generator is connected to the hot-side inlet of the regenerator, the hot-side outlet of the regenerator is connected to the inlet of the cooler, the outlet of the cooler is connected to the inlet of the gas storage tank, the outlet of the gas storage tank is connected to the compressor inlet, and the compressor outlet is connected to the inlet of the gas storage tank; the turbine inlet of the CO2 generator is connected to the turbine outlet of the CO2 generator.

[0007] The hot-side outlet of the regenerator is connected to the inlet of the heating network gas pump, the outlet of the heating network gas pump is connected to the inlet of the auxiliary gas heat exchanger, and the outlet of the auxiliary gas heat exchanger is connected to the inlet of the main system cooler.

[0008] A further improvement of the supercritical carbon dioxide cycle power generation system described in this invention is that:

[0009] Furthermore, the compressor outlet is connected to the gas storage tank inlet via a compressor bypass.

[0010] Furthermore, the turbine inlet and turbine outlet of the carbon dioxide generator unit are connected via a turbine bypass.

[0011] Furthermore, the cold side of the cooler is connected to the cooling unit.

[0012] Furthermore, the hot-side outlet of the regenerator is connected to the inlet of the heating network gas pump via branch pipes and the main circuit to the heating network circuit valve.

[0013] Furthermore, the outlet of the heating network gas pump is divided into two paths. One path is connected to the inlet of the auxiliary gas heat exchanger via the heating network heat exchanger and its regulating valve. The other path is connected to the inlet of the auxiliary gas heat exchanger via the heating network heat exchanger bypass shut-off valve and its regulating valve.

[0014] Furthermore, the outlet of the auxiliary gas heat exchanger is connected to the inlet of the main system cooler via the heat network loop to the main circuit valve.

[0015] Furthermore, the inlet of the carbon dioxide generator unit is equipped with a quick-closing valve and a regulating valve, and the outlet of the carbon dioxide generator unit is equipped with a check valve.

[0016] Furthermore, the cooler is selected as a printed circuit board heat exchanger.

[0017] This invention discloses a thermoelectric decoupling operation method for a supercritical carbon dioxide cycle power generation system, comprising the following steps:

[0018] The cold carbon dioxide output from the gas storage tank enters the compressor for pressurization, then enters the regenerator for preheating, and finally enters the boiler for heat exchange and temperature increase.

[0019] The high-grade working fluid output from the boiler after heat exchange enters the carbon dioxide unit to perform work. The exhaust gas after performing work enters the hot side of the regenerator as a heat source to heat the outlet working fluid of the compressor. The exhaust gas output from the regenerator after heat exchange is divided into two branches: one branch enters the cooler directly, and the other branch enters the heating network gas pump. The working fluid output from the heating network gas pump enters the auxiliary gas heat exchanger through the heating network heat exchanger. The working fluid output from the auxiliary gas heat exchanger enters the cooler to cool down, and then enters the gas storage tank to improve the efficiency and operational stability of the compressor.

[0020] The present invention has the following beneficial effects:

[0021] In specific operation, the supercritical carbon dioxide cycle power generation system and its thermoelectric decoupling operation method described in this invention increase the compressor output when the electrical load demand increases and the heat load demand decreases. The inlet guide vanes, inverter frequency, or compressor bypass are adjusted according to the compressor parameters. The opening of the bypass regulating valve of the heat exchanger is increased, while the opening of the heat exchanger regulating valve is decreased, and the boiler fuel quantity is appropriately reduced. Conversely, when the electrical load demand decreases and the heat load demand increases, the compressor output decreases. The inlet guide vanes, inverter frequency, or compressor bypass are adjusted according to the compressor parameters. The compressor operates at its rated load with the bypass fully closed. This achieves a thermoelectric decoupling operation mode different from the traditional "heat-driven power generation" approach. Power generation and heat supply are flexibly adjusted according to grid demand and heat load changes, improving the system's energy utilization efficiency and economy. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a structural diagram of the present invention.

[0024] Among them, 1 is the compressor, 2 is the regenerator, 3 is the boiler, 4 is the carbon dioxide generator, 5 is the cooler, 6 is the gas storage tank, 7 is the cooling unit, 1by is the compressor bypass, 4by is the turbine bypass, 8 is the heating network gas pump, 9 is the heating network heat exchanger, 10 is the auxiliary gas heat exchanger, 8a is the main circuit to heating network circuit valve, 8b is the heating network circuit to main circuit valve, 9a is the heating network heat exchanger regulating valve, 9b is the heating network heat exchanger bypass shut-off valve, and 9c is the heating network heat exchanger bypass regulating valve. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0029] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0030] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0033] Example 1

[0034] refer to Figure 1 The supercritical carbon dioxide cycle power generation system of the present invention includes a compressor 1, a regenerator 2, a boiler 3, a carbon dioxide generator 4, a cooler 5, a gas storage tank 6, a cooling unit 7, a compressor bypass 1by, a turbine bypass 4by, a heating network gas pump 8, a heating network heat exchanger 9, an auxiliary gas heat exchanger 10, a main circuit to heating network circuit valve 8a, a heating network circuit to main circuit valve 8b, a heating network heat exchanger regulating valve 9a, a heating network heat exchanger bypass shut-off valve 9b, and a heating network heat exchanger bypass regulating valve 9c.

[0035] The outlet of compressor 1 is connected to the cold-side inlet of regenerator 2. The cold-side outlet of regenerator 2 is connected to the inlet of boiler 3. The outlet of boiler 3 is connected to the intake side of CO2 generator 4. The exhaust side of CO2 generator 4 is connected to the hot-side inlet of regenerator 2. The hot-side outlet of regenerator 2 is connected to the inlet of cooler 5. The outlet of cooler 5 is connected to the inlet of gas storage tank 6. The outlet of gas storage tank 6 is connected to the inlet of compressor 1. The outlet of compressor 1 is connected to the inlet of gas storage tank 6 via compressor bypass 1by. The turbine inlet and outlet of CO2 generator 4 are connected via turbine bypass 4by. The cold side of cooler 5 is connected to cooling unit 7.

[0036] The hot side outlet of the regenerator 2 is connected to the inlet of the heat network gas pump 8 via a branch pipeline and the main circuit to the heat network circuit valve 8a. The outlet of the heat network gas pump 8 is divided into two paths. One path is connected to the inlet of the auxiliary gas heat exchanger 10 via the heat network heat exchanger 9 and the heat network heat exchanger regulating valve 9a. The other path is connected to the inlet of the auxiliary gas heat exchanger 10 via the heat network heat exchanger bypass shut-off valve 9b and the heat network heat exchanger bypass regulating valve 9c. The outlet of the auxiliary gas heat exchanger 10 is connected to the inlet of the main system cooler 5 via the heat network circuit to the main circuit valve 8b.

[0037] In this embodiment, the main compressor 1 only needs to meet the variable operating condition adjustment capability, which can be achieved through, but is not limited to, frequency converters, outlet guide vanes, etc.

[0038] In this embodiment, the regenerator 2 is a printed circuit board heat exchanger that is highly compatible with carbon dioxide and liquid metal.

[0039] In this embodiment, the form, arrangement, number of reheat stages, and type of fuel of boiler 3 are determined according to the actual situation.

[0040] In this embodiment, the inlet of the carbon dioxide generator 4 is equipped with a quick-closing valve and a regulating valve, and the outlet of the carbon dioxide generator 4 is equipped with a check valve; the sealing method is a dry gas seal.

[0041] In this embodiment, the cooler 5 is a printed circuit board heat exchanger; the selection of the cold source can be determined according to actual conditions.

[0042] In this embodiment, the gas storage tank 6 is a closed pressure vessel with model parameters sufficient to meet the system's working pressure boundary.

[0043] In this embodiment, the heating network air pump 8 is selected as an axial flow compressor 1 capable of accommodating large flow rates. It is recommended to select a frequency converter to increase the adjustment margin and meet the requirements of simultaneously adjusting the total circulation flow rate on the heating network side and the pressure in front of the heating network circuit to the cooler 5.

[0044] In this embodiment, there are no special requirements for the model and heat exchange method of the heat network heat exchanger 9 and the auxiliary gas heat exchanger 10; they only need to meet the basic heat exchange requirements. The quantity, arrangement, and whether to introduce an auxiliary gas system can be determined based on actual conditions.

[0045] In this embodiment, the compressor bypass 1by and the turbine bypass 4by need to meet a 100% adjustable range and have rapid response capability.

[0046] Example 2

[0047] This invention discloses a thermoelectric decoupling operation method for a supercritical carbon dioxide cycle power generation system. The supercritical carbon dioxide cycle power generation system includes a compressor 1, a regenerator 2, a boiler 3, a carbon dioxide generator 4, a cooler 5, a gas storage tank 6, a cooling unit 7, a compressor bypass 1by, a turbine bypass 4by, a heating network gas pump 8, a heating network heat exchanger 9, an auxiliary gas heat exchanger 10, a main circuit to heating network circuit valve 8a, a heating network circuit to main circuit valve 8b, a heating network heat exchanger regulating valve 9a, a heating network heat exchanger bypass shut-off valve 9b, and a heating network heat exchanger bypass regulating valve 9c.

[0048] The thermoelectric decoupling operation method of the supercritical carbon dioxide cycle power generation system includes the following steps:

[0049] During the system preparation phase, the external working fluid output from gas storage tank 6 is supplied to the main system via pipeline. At this time, turbine bypass 4by remains 100% open, and valves 8a from the main circuit to the heating network circuit and 8b from the heating network circuit to the main circuit are kept open according to heating requirements. Heat network heat exchanger bypass shut-off valve 9b and heat network heat exchanger bypass regulating valve 9c remain open. Heat network heat exchanger regulating valve 9a is closed after pressurization is completed.

[0050] Under rated operating conditions, the cold carbon dioxide output from gas storage tank 6 (the working fluid parameters should be maintained above the critical point, i.e., the temperature is higher than 31.05℃ and the pressure is higher than 7.38MPa) enters compressor 1 for pressurization, then enters regenerator 2 for preheating, and then enters boiler 3 for heat exchange and temperature increase. The heat source of boiler 3 can be coal, natural gas or nuclear energy.

[0051] The high-grade working fluid output from boiler 3 after heat exchange enters carbon dioxide unit 4 to perform work. The exhaust gas after performing work enters the hot side of regenerator 2 as a heat source to heat the outlet working fluid of compressor 1. The exhaust gas output from regenerator 2 after heat exchange is divided into two branches: one branch enters cooler 5 directly, and the other branch enters the heat network gas pump 8 through the main circuit to the heat network circuit valve 8a. The working fluid output from heat network gas pump 8 enters the auxiliary gas heat exchanger 10 through heat network heat exchanger 9 and heat network heat exchanger regulating valve 9a. Alternatively, it can enter the auxiliary gas heat exchanger 10 through heat network heat exchanger bypass shut-off valve 9b and heat network heat exchanger bypass regulating valve 9c as a heat source for the auxiliary steam system. The working fluid output from auxiliary gas heat exchanger 10 enters the cooler 5 through the main circuit to the heat network circuit valve 8a for cooling, and then enters the gas storage tank 6 to improve the efficiency and operational stability of compressor 1.

[0052] When both electricity and heat demand increase simultaneously, the process is not significantly different from traditional thermal power generation. In this case, the output of compressor 1 is increased, along with the fuel quantity of boiler 3. The inlet working fluid parameters (temperature and pressure) of carbon dioxide unit 4 rise, thus causing both electrical and heat loads to increase synchronously. Conversely, when both electricity and heat demand decrease simultaneously, the fuel quantity of boiler 3 and the output of compressor 1 are appropriately reduced, resulting in a synchronous decrease in both electrical and heat loads.

[0053] Considering that heating units mostly operate on a "heat-driven power generation" model in winter, when heating demand is adjusted within a small range (below 10% of rated load), the focus of operation should be on the opening relationship between the regulating valve 9a and the bypass regulating valve 9c of the heating network heat exchanger in the heating network loop. The adjustment of these two valves should be based on their characteristic curves, adjusting their opening ratio according to the required heat supply. During the adjustment process, instantaneous small-scale pressure fluctuations may cause electrical load disturbances or turbine speed disturbances in the main system and the carbon dioxide unit 4. Operators should strengthen the monitoring and intervention of relevant parameters. If necessary, an auxiliary gas system can be introduced to buffer the disturbances caused by changes in the enthalpy of the heating network loop through the auxiliary gas heat exchanger 10.

[0054] When power grid dispatching or heating network dispatching requires large-scale adjustments to power supply and heating output, it is necessary to rebuild the system's "heat and power" balance.

[0055] When electrical load demand increases and heat load demand decreases, the output of compressor 1 is increased. The inlet guide vanes, inverter frequency, or compressor bypass 1by are adjusted according to the parameters of compressor 1. The opening of the heat exchanger bypass regulating valve 9c is increased, while the opening of the heat exchanger regulating valve 9a is decreased, and the fuel quantity of boiler 3 is appropriately reduced. To meet this operating condition, the cooling capacity of cooler 5 is adjusted to reduce disturbances in the inlet working fluid parameters of compressor 1, bringing the operating point of compressor 1 closer to the carbon dioxide critical point (31.05℃, 7.38MPa). According to the properties of carbon dioxide, approaching the critical point is equivalent to increasing the output power of compressor 1.

[0056] Conversely, when electrical load demand decreases and heat load demand increases, the system should be adjusted as follows: reduce the output of compressor 1, adjust the inlet guide vanes, inverter frequency, or compressor bypass 1by according to the parameters of compressor 1. During adjustment, the circulation flow of the main system should be constantly monitored. When adjusting compressor bypass 1by, the valve characteristic curve should be considered. When compressor 1 is operating at its rated load and compressor bypass 1by is fully closed, it is not recommended to reduce compressor 1's output by opening compressor bypass 1by, as this can easily cause overpressure at the compressor 1 inlet, leading to excessively high exhaust gas pressure and a sudden drop in electrical load.

[0057] For the heating network circuit, the opening degree of the bypass regulating valve 9c of the heating network heat exchanger is reduced and the opening degree of the regulating valve 9a of the heating network heat exchanger is increased. This method is only applicable to lower heating conditions.

[0058] Meanwhile, for the main system loop, the fuel quantity of boiler 3 is moderately increased; in response to changing operating conditions, the cooling capacity of cooler 5 is adjusted to reduce the disturbance of the heating network loop to the main system, especially the inlet working fluid parameters of compressor 1, while adjusting the operating point of compressor 1 upwards away from the carbon dioxide critical point (31.05℃, 7.38MPa). According to the physical properties of carbon dioxide, moving away from the critical point is equivalent to reducing the output power of compressor 1.

[0059] It is important to note that when reconstructing the system's thermoelectric balance, it is not recommended to adjust the output of the heating network pump 8 over a wide range to avoid affecting the change in the enthalpy of the heating network water; to avoid affecting the pressure after the heating network circuit to the main circuit valve 8b; and to avoid affecting the inlet pressure of the compressor 1, the load of the carbon dioxide unit 4, and the steady state of the entire system.

[0060] Different auxiliary machines should be adjusted separately to avoid over-adjustment causing the system overpressure protection to trip. In addition, regarding the change of compressor 1 inlet working fluid parameters during heat load adjustment, it is assumed that in a supercritical carbon dioxide cycle power generation system, the parameters should be above the carbon oxide critical point (31.05℃, 7.38MPa).

[0061] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0062] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0063] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A thermoelectric decoupling operation method for a supercritical carbon dioxide cycle power generation system, characterized in that, The supercritical carbon dioxide cycle power generation system includes a compressor (1), a regenerator (2), a boiler (3), a carbon dioxide generator (4), a cooler (5), a gas storage tank (6), a heating network gas pump (8), and an auxiliary gas heat exchanger (10). The outlet of compressor (1) is connected to the cold side inlet of regenerator (2), the cold side outlet of regenerator (2) is connected to the inlet of boiler (3), the outlet of boiler (3) is connected to the air intake side of carbon dioxide unit (4), the exhaust side of carbon dioxide unit (4) is connected to the hot side inlet of regenerator (2), the hot side outlet of regenerator (2) is connected to the inlet of cooler (5), the outlet of cooler (5) is connected to the inlet of gas storage tank (6), the outlet of gas storage tank (6) is connected to the inlet of compressor (1), and the outlet of compressor (1) is connected to the inlet of gas storage tank (6); the turbine inlet of carbon dioxide unit (4) is connected to the turbine outlet of carbon dioxide unit (4); The hot side outlet of the regenerator (2) is connected to the inlet of the heat network gas pump (8), the outlet of the heat network gas pump (8) is connected to the inlet of the auxiliary gas heat exchanger (10), and the outlet of the auxiliary gas heat exchanger (10) is connected to the inlet of the main system cooler (5). The thermoelectric decoupling operation method includes the following steps: The cold carbon dioxide output from the gas storage tank (6) enters the compressor (1) for pressurization, then enters the regenerator (2) for preheating, and then enters the boiler (3) for heat exchange and temperature increase. The high-grade working fluid output from the boiler (3) after heat exchange enters the carbon dioxide unit (4) to do work. The exhaust gas after doing work enters the hot side of the regenerator (2) as a heat source to heat the outlet working fluid of the compressor (1). The exhaust gas output from the regenerator (2) after heat exchange is divided into two branches. One branch enters the cooler (5) directly, and the other branch enters the heat network gas pump (8). The working fluid output from the heat network gas pump (8) enters the auxiliary gas heat exchanger (10) through the heat network heat exchanger (9). The working fluid output from the auxiliary gas heat exchanger (10) enters the cooler (5) for cooling, and then enters the gas storage tank (6) to improve the efficiency and operating stability of the compressor (1). When the demand for electricity and heating increases at the same time, the output of the compressor (1) is increased, and the fuel quantity of the boiler (3) is increased. When the demand for electricity increases and the demand for heat decreases, the output of the compressor (1) is increased. The inlet guide vane, frequency converter frequency or compressor bypass (1by) is adjusted according to the parameters of the compressor (1). The opening of the bypass regulating valve (9c) of the heat exchanger is increased, while the opening of the regulating valve (9a) of the heat exchanger is decreased. At the same time, the fuel quantity of the boiler (3) is appropriately reduced. When the electrical load demand decreases and the heat load demand increases, the output of the compressor (1) is reduced. The inlet guide vane, the frequency converter frequency, or the compressor bypass (1by) is adjusted according to the parameters of the compressor (1). The compressor (1) operates at the rated load and the compressor bypass (1by) is fully closed.

2. The thermoelectric decoupling operation method of the supercritical carbon dioxide cycle power generation system according to claim 1, characterized in that, The outlet of the compressor (1) is connected to the inlet of the gas storage tank (6) via the compressor bypass (1by).

3. The thermoelectric decoupling operation method of the supercritical carbon dioxide cycle power generation system according to claim 1, characterized in that, The turbine inlet of the carbon dioxide generator (4) and the turbine outlet of the carbon dioxide generator (4) are connected by a turbine bypass (4by).

4. The thermoelectric decoupling operation method of the supercritical carbon dioxide cycle power generation system according to claim 1, characterized in that, The cooler (5) is connected to a cooling unit (7) on its cold side.

5. The thermoelectric decoupling operation method of the supercritical carbon dioxide cycle power generation system according to claim 1, characterized in that, The hot side outlet of the regenerator (2) is connected to the inlet of the heating network gas pump (8) via a branch pipeline and the main circuit to the heating network circuit valve (8a).

6. The thermoelectric decoupling operation method of the supercritical carbon dioxide cycle power generation system according to claim 1, characterized in that, The outlet of the heat network gas pump (8) is divided into two paths. One path is connected to the inlet of the auxiliary gas heat exchanger (10) via the heat network heat exchanger (9) and the heat network heat exchanger regulating valve (9a). The other path is connected to the inlet of the auxiliary gas heat exchanger (10) via the heat network heat exchanger bypass shut-off valve (9b) and the heat network heat exchanger bypass regulating valve (9c).

7. The thermoelectric decoupling operation method of the supercritical carbon dioxide cycle power generation system according to claim 1, characterized in that, The outlet of the auxiliary gas heat exchanger (10) is connected to the inlet of the main system cooler (5) via the heat network loop to the main circuit valve (8b).

8. The thermoelectric decoupling operation method of the supercritical carbon dioxide cycle power generation system according to claim 1, characterized in that, The inlet of the carbon dioxide generator (4) is equipped with a quick-closing valve and a regulating valve, and the outlet of the carbon dioxide generator (4) is equipped with a check valve.

9. The thermoelectric decoupling operation method of the supercritical carbon dioxide cycle power generation system according to claim 1, characterized in that, Cooler (5) Select a printed circuit board heat exchanger.

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