A distributed combined cycle power generation energy-saving control system and method

Abstract

The present application relates to the technical field of distributed combined cycle power generation, and in particular to a distributed combined cycle power generation energy-saving control system and method. The system comprises: obtaining a load change instruction, generating a load change amount according to the load change instruction, and setting the operating parameters of the gas unit according to the load change amount; obtaining the flue gas temperature difference in the waste heat boiler, setting the operating parameters of the waste heat boiler and the steam unit according to the flue gas temperature difference; obtaining the working power of the steam unit, and determining whether to correct the working parameters of the gas unit according to the working power of the steam unit. By collecting the flue gas temperature difference between the front and rear sides of the waste heat boiler, the flue gas regulating damper opening is dynamically adjusted to match the startup speed of the waste heat boiler, thereby avoiding operational risks caused by excessive flue gas temperature differences in the waste heat boiler and improving the operating efficiency of the boiler.

Description

Technical Field

[0001] The present application relates to the technical field of distributed combined cycle power generation, and in particular to a distributed combined cycle power generation energy-saving control system and method. Background Art

[0002] Gas-steam combined cycle power generation units, due to their comprehensive benefits such as energy conservation and environmental improvement, have received significant attention from governments worldwide, receiving policy support and regulatory protection. In recent years, with the gradual rationalization of energy structures and increasing environmental protection requirements, the rational utilization of energy through the use of blast furnace gas (BFG) as a fuel for gas-fired power generation has attracted the attention of insightful individuals both domestically and internationally, and the market has gradually developed. Currently, few gas-fired units in China and abroad use BFG as a fuel, and few operate solely on BFG. Furthermore, BFG has low calorific value and high dust content, and its unit structure differs somewhat from conventional gas turbines.

[0003] Distributed gas-steam combined cycle units face frequent startups and shutdowns, as well as load fluctuations. During these cycles, the operating parameters and efficiency of the gas turbines, waste heat boilers, and steam turbines undergo significant changes. Unit operating parameters are typically designed based on rated operating conditions, and the gas turbines, waste heat boilers, and steam turbines are often purchased from different suppliers. In actual operation, these characteristics of distributed combined cycles make it difficult to coordinate and match the performance and parameters of the various host equipment, resulting in long-term unnecessary economic losses. Summary of the Invention

[0004] The purpose of this application is: to solve the above technical problems, this application provides a distributed combined cycle power generation energy-saving control system and method, aiming to achieve efficient operation of gas-steam combined cycle units.

[0005] In some embodiments of the present application, by collecting the flue gas temperature difference between the front and rear sides of the waste heat boiler, the opening of the flue gas regulating damper is dynamically adjusted to match the starting speed of the waste heat boiler, thereby avoiding operational risks caused by excessive difference in the flue gas temperature of the waste heat boiler and improving the operating efficiency of the boiler.

[0006] In some embodiments of the present application, by adding a first correction module, the operating parameters of the gas unit and the steam unit are corrected according to the total working efficiency, and the goal of reducing the gas volume is achieved by dynamically adjusting the opening of the gas compressor inlet guide vane, thereby improving the operating energy efficiency of the circulation power generation unit.

[0007] In some embodiments of the present application, a distributed combined cycle power generation energy-saving control method is provided, comprising:

[0008] Obtaining a load change instruction, generating a load change amount according to the load change instruction, and setting operating parameters of the gas generator set according to the load change amount;

[0009] Obtaining a flue gas temperature difference in the waste heat boiler, and setting the waste heat boiler operating parameters and the steam unit operating parameters according to the flue gas temperature difference;

[0010] The working power of the steam unit is obtained, and it is determined whether to modify the working parameters of the gas unit according to the working power of the steam unit.

[0011] In some embodiments of the present application, when setting the operating parameters of the waste heat boiler according to the flue gas temperature difference, the method includes:

[0012] A smoke temperature difference matrix A is preset, and A(A1, A2, A3, A4) is set, where A1 is a preset first smoke temperature difference, A2 is a preset second smoke temperature difference, A3 is a preset third smoke temperature difference, and A4 is a preset fourth smoke temperature difference, and A1<A2<A3<A4;

[0013] Preset the flue gas regulating damper opening matrix B, set B(B1, B2, B3, B4), where B1 is the preset first flue gas regulating damper opening, B2 is the preset second flue gas regulating damper opening, B3 is the preset third flue gas regulating damper opening, B1 is the preset fourth flue gas regulating damper opening, and B1<B2<B3<B4;

[0014] Obtaining a real-time flue gas temperature difference a in the waste heat boiler, and setting a real-time flue gas regulating damper opening b according to the real-time flue gas temperature difference a;

[0015] If A1<a<A2, the real-time flue gas regulating damper opening b is set to the preset fourth flue gas regulating damper opening B4, that is, b=B4;

[0016] If A2<a<A3, the real-time flue gas regulating damper opening b is set to the preset third flue gas regulating damper opening B3, that is, b=B3;

[0017] If A3<a<A4, the real-time flue gas regulating damper opening b is set to the preset second flue gas regulating damper opening B2, that is, b=B2;

[0018] If a>A4, the real-time flue gas regulating damper opening degree b is set to the preset first flue gas regulating damper opening degree B1, that is, b=B1.

[0019] In some embodiments of the present application, setting the steam unit operating parameters includes:

[0020] Obtaining a flue gas temperature average and a flue gas flow rate of the waste heat boiler, and generating a workmanship evaluation value based on the flue gas flow rate and the flue gas average;

[0021] The opening of the high-pressure regulating valve of the steam unit is set according to the workmanship evaluation value.

[0022] In some embodiments of the present application, generating a workmanship evaluation value includes:

[0023] Preset the first workmanship coefficient n1 and the second workmanship coefficient n2;

[0024] Generate a workmanship evaluation value e based on the flue gas temperature average c and flue gas flow rate d of the waste heat boiler;

[0025] Among them, e=n1*c+n2*d.

[0026] In some embodiments of the present application, when setting the opening of the high-pressure regulating valve of the steam unit according to the workmanship evaluation value, the method includes:

[0027] A preset workmanship evaluation value matrix E is set to E(E1, E2, E3, E4), where E1 is a preset first workmanship evaluation value, E2 is a preset second workmanship evaluation value, E3 is a preset third workmanship evaluation value, and E4 is a preset fourth workmanship evaluation value, and E1<E2<E3<E4;

[0028] Preset the steam unit high-pressure regulating valve opening matrix F, set F(F1, F2, F3, F4), where F1 is the preset high-pressure regulating valve opening of the first steam unit, F2 is the preset high-pressure regulating valve opening of the second steam unit, F3 is the preset high-pressure regulating valve opening of the third steam unit, and F4 is the preset high-pressure regulating valve opening of the fourth steam unit, and F1 < F2 < F3 < F4;

[0029] Obtaining a real-time workmanship evaluation value E, and setting a high-pressure regulating valve opening f of the steam unit according to the real-time workmanship evaluation value e;

[0030] If E1<e<E2, the steam unit high pressure regulating valve opening F is set to be between the preset first steam unit high pressure regulating valve opening F1 and the preset second steam unit high pressure regulating valve opening F2, and F1<f<F2;

[0031] If E2<e<E3, the steam unit high pressure regulating valve opening F is set to be between the preset second steam unit high pressure regulating valve opening F2 and the preset third steam unit high pressure regulating valve opening F3, and F2<f<F3;

[0032] If E3<e<E4, the steam unit high pressure regulating valve opening F is set to be between the preset third steam unit high pressure regulating valve opening F3 and the preset fourth steam unit high pressure regulating valve opening F4, and F3<f<F4;

[0033] If e>E4, the steam unit high pressure regulating valve opening F is set to be greater than the preset fourth steam unit high pressure regulating valve opening F4, that is, f>F4.

[0034] In some embodiments of the present application, the determining whether to modify the operating parameters of the gas generator set according to the operating power of the steam generator set includes:

[0035] Obtain the steam unit operating rate v1 and the gas unit operating rate v2, and generate a real-time total operating rate value V;

[0036] Get the preset total load working rate threshold V1;

[0037] If V>V1, a velocity difference g is generated, and a reduction amount m of the gas compressor inlet guide vane opening is set according to the velocity difference g;

[0038] If V<V1, the operating parameters of the gas unit will not be corrected.

[0039] In some embodiments of the present application, when setting the reduction amount m of the inlet guide vane opening of the gas compressor according to the rate difference g, the method includes:

[0040] A preset rate difference matrix G is set to G(G1, G2, G3, G4), where G1 is a preset first rate difference, G2 is a preset second rate difference, G3 is a preset third rate difference, and G4 is a preset fourth rate difference, and G1 < G2 < G3 < G4;

[0041] Preset the opening reduction amount matrix M, set M (M1, M2, M3, M4), where M1 is the preset first opening reduction amount, M2 is the preset second opening reduction amount, M3 is the preset third opening reduction amount, M4 is the preset fourth opening reduction amount, and M1 < M2 < M3 < M4;

[0042] If g<G1, the gas compressor inlet guide vane opening reduction amount m is set to the preset first opening reduction amount M1, that is, m=M1;

[0043] If C1<g<G2, the gas compressor inlet guide vane opening reduction amount m is set to the preset second opening reduction amount M2, that is, m=M2;

[0044] If C2<g<G3, the gas compressor inlet guide vane opening reduction amount m is set to the preset third opening reduction amount M3, that is, m=M3;

[0045] If C3<g<G4, the reduction amount m of the inlet guide vane opening of the fuel gas compressor is set to the preset fourth reduction amount M4, that is, m=M4.

[0046] In some embodiments of the present application, a distributed combined cycle power generation energy-saving control system is provided, comprising:

[0047] Central control unit;

[0048] A gas generator set control unit is connected to the central control unit via a wireless signal, and the gas generator set control unit sets the gas generator set operating parameters according to the load variation;

[0049] A waste heat boiler control unit connected to the central control unit;

[0050] The steam unit control unit is connected to the central control unit via a wireless signal, and the steam unit control unit is used to set the working parameters of the steam unit.

[0051] In some embodiments of the present application, the central control unit includes:

[0052] The first processing module is used to obtain the steam unit operating rate v1 and the gas unit operating rate v2, and generate a real-time operating rate total value V;

[0053] The first processing module is further configured to obtain a preset total load working rate threshold V1 and generate a rate difference g;

[0054] A first correction module is configured to set a reduction amount m of the gas compressor inlet guide vane opening according to the rate difference g.

[0055] In some embodiments of the present application, the waste heat boiler control unit includes:

[0056] A monitoring module, which is used to collect the flue gas temperature data and flue gas flow rate data inside the waste heat boiler;

[0057] A second processing module, configured to generate a smoke temperature difference and a smoke temperature mean according to the smoke temperature data collected by the monitoring module;

[0058] The third processing module is used to generate a workmanship evaluation value e based on the flue gas temperature average c and the flue gas flow rate d of the waste heat boiler;

[0059] The second control module is used to set the opening of the high-pressure regulating valve of the steam unit according to the workmanship evaluation value e.

[0060] Compared with the prior art, the distributed combined cycle power generation energy-saving control system and method of the present application have the following beneficial effects:

[0061] By collecting the flue gas temperature difference between the front and rear sides of the waste heat boiler, the flue gas regulating damper opening is dynamically adjusted to match the startup speed of the waste heat boiler, avoiding operational risks caused by excessive difference in the flue gas temperature of the waste heat boiler and improving the operating efficiency of the boiler.

[0062] By adding a first correction module, the operating parameters of the gas unit and steam unit are corrected according to their total working efficiency. By dynamically adjusting the opening of the gas compressor inlet guide vane, the goal of reducing the gas volume is achieved, thereby improving the operating energy efficiency of the cycle power generation unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1This is a structural diagram of a distributed combined cycle power generation energy-saving control method in a preferred embodiment of the present application;

[0064] Figure 2 It is a structural diagram of a distributed combined cycle power generation energy-saving control system in the preferred embodiment of the present application. DETAILED DESCRIPTION

[0065] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0066] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0067] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0068] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0069] like Figure 1 As shown, a distributed combined cycle power generation energy-saving control method according to a preferred embodiment of the present application includes:

[0070] S101: Obtain a load change instruction, generate a load change amount according to the load change instruction, and set the gas generator set operating parameters according to the load change amount;

[0071] S102: Obtaining a flue gas temperature difference in the waste heat boiler, and setting the waste heat boiler operating parameters and the steam unit operating parameters according to the flue gas temperature difference;

[0072] S103: Obtain the working power of the steam unit, and determine whether to modify the working parameters of the gas unit according to the working power of the steam unit.

[0073] Specifically, when setting the waste heat boiler operating parameters based on the flue gas temperature difference, it includes:

[0074] A smoke temperature difference matrix A is preset, and A(A1, A2, A3, A4) is set, where A1 is a preset first smoke temperature difference, A2 is a preset second smoke temperature difference, A3 is a preset third smoke temperature difference, and A4 is a preset fourth smoke temperature difference, and A1<A2<A3<A4;

[0075] Preset the flue gas regulating damper opening matrix B, set B(B1, B2, B3, B4), where B1 is the preset first flue gas regulating damper opening, B2 is the preset second flue gas regulating damper opening, B3 is the preset third flue gas regulating damper opening, B1 is the preset fourth flue gas regulating damper opening, and B1<B2<B3<B4;

[0076] Obtain the real-time flue gas temperature difference a in the waste heat boiler, and set the real-time flue gas regulating damper opening b according to the real-time flue gas temperature difference a;

[0077] If A1<a<A2, the real-time flue gas regulating damper opening b is set to the preset fourth flue gas regulating damper opening B4, that is, b=B4;

[0078] If A2<a<A3, the real-time flue gas regulating damper opening b is set to the preset third flue gas regulating damper opening B3, that is, b=B3;

[0079] If A3<a<A4, the real-time flue gas regulating damper opening b is set to the preset second flue gas regulating damper opening B2, that is, b=B2;

[0080] If a>A4, the real-time flue gas regulating damper opening degree b is set to the preset first flue gas regulating damper opening degree B1, that is, b=B1.

[0081] Specifically, the flue gas temperature difference refers to the flue gas temperature difference between the front and rear sides of the waste heat boiler.

[0082] Specifically, a guide plate is added at the inlet corner where the flue gas enters the outlet heating surface of the HP secondary superheater of the waste heat boiler to evenly distribute the flue gas flow entering the boiler to the boiler heating surface.

[0083] It can be understood that in the above embodiment, by presetting the flue gas regulating damper opening matrix and the flue gas temperature difference matrix, when the waste heat boiler is started, the flue gas regulating damper opening is dynamically adjusted by collecting the flue gas temperature difference between the front and rear sides of the waste heat boiler to match the starting speed of the waste heat boiler, thereby avoiding operational risks caused by excessive difference in the flue gas temperature of the waste heat boiler and improving the operating efficiency of the boiler.

[0084] In a preferred embodiment of the present application, when setting the operating parameters of the steam unit, the following steps are included:

[0085] Obtain the average flue gas temperature and flue gas flow rate of the waste heat boiler, and generate a workmanship evaluation value based on the flue gas flow rate and flue gas average;

[0086] Set the opening of the high-pressure regulating valve of the steam unit according to the workmanship evaluation value.

[0087] Specifically, when generating the workmanship evaluation value, it includes:

[0088] Preset the first workmanship coefficient n1 and the second workmanship coefficient n2;

[0089] Generate a workmanship evaluation value e based on the flue gas temperature average c and flue gas flow rate d of the waste heat boiler;

[0090] Among them, e=n1*c+n2*d.

[0091] Specifically, the first working coefficient and the second working coefficient are set according to the historical operation data of the waste heat boiler.

[0092] Specifically, when setting the opening of the high-pressure regulating valve of the steam unit according to the workmanship evaluation value, it includes:

[0093] A preset workmanship evaluation value matrix E is set to E(E1, E2, E3, E4), where E1 is a preset first workmanship evaluation value, E2 is a preset second workmanship evaluation value, E3 is a preset third workmanship evaluation value, and E4 is a preset fourth workmanship evaluation value, and E1<E2<E3<E4;

[0094] Preset the steam unit high-pressure regulating valve opening matrix F, set F(F1, F2, F3, F4), where F1 is the preset high-pressure regulating valve opening of the first steam unit, F2 is the preset high-pressure regulating valve opening of the second steam unit, F3 is the preset high-pressure regulating valve opening of the third steam unit, and F4 is the preset high-pressure regulating valve opening of the fourth steam unit, and F1 < F2 < F3 < F4;

[0095] Obtain a real-time workmanship evaluation value E, and set the steam unit high-pressure regulating valve opening f according to the real-time workmanship evaluation value e;

[0096] If E1<e<E2, the steam unit high pressure regulating valve opening F is set to be between the preset first steam unit high pressure regulating valve opening F1 and the preset second steam unit high pressure regulating valve opening F2, and F1<f<F2;

[0097] If E2<e<E3, the steam unit high pressure regulating valve opening F is set to be between the preset second steam unit high pressure regulating valve opening F2 and the preset third steam unit high pressure regulating valve opening F3, and F2<f<F3;

[0098] If E3<e<E4, the steam unit high pressure regulating valve opening F is set to be between the preset third steam unit high pressure regulating valve opening F3 and the preset fourth steam unit high pressure regulating valve opening F4, and F3<f<F4;

[0099] If e>E4, the steam unit high pressure regulating valve opening F is set to be greater than the preset fourth steam unit high pressure regulating valve opening F4, that is, f>F4.

[0100] It can be understood that in the above embodiment, by generating a work evaluation value, the high-pressure regulating valve opening of the steam unit is dynamically adjusted, thereby adjusting the work efficiency of the steam unit, thereby improving the thermal efficiency of the waste heat boiler, reducing energy waste, and improving the operating energy efficiency of the cycle generator set.

[0101] In a preferred embodiment of the present application, when determining whether to modify the operating parameters of the gas unit according to the working power of the steam unit, the method includes:

[0102] Obtain the steam unit operating rate v1 and the gas unit operating rate v2, and generate a real-time total operating rate value V;

[0103] Get the preset total load working rate threshold V1;

[0104] If V>V1, a velocity difference g is generated, and the reduction amount m of the gas compressor inlet guide vane opening is set according to the velocity difference g;

[0105] If V<V1, the operating parameters of the gas unit will not be corrected.

[0106] Specifically, as the high-pressure regulating valve is slowly opened, the work of the steam turbine increases, the total load increases, and when the steam turbine work rate exceeds the total load set rate, in order to balance the total load, the opening of the fuel gas compressor inlet guide vane is reduced, thereby reducing the gas volume and reducing the work of the gas turbine.

[0107] Specifically, when setting the reduction amount m of the gas compressor inlet guide vane opening according to the rate difference g, it includes:

[0108] A preset rate difference matrix G is set to G(G1, G2, G3, G4), where G1 is a preset first rate difference, G2 is a preset second rate difference, G3 is a preset third rate difference, and G4 is a preset fourth rate difference, and G1 < G2 < G3 < G4;

[0109] Preset the opening reduction amount matrix M, set M (M1, M2, M3, M4), where M1 is the preset first opening reduction amount, M2 is the preset second opening reduction amount, M3 is the preset third opening reduction amount, M4 is the preset fourth opening reduction amount, and M1 < M2 < M3 < M4;

[0110] If g<G1, the gas compressor inlet guide vane opening reduction amount m is set to the preset first opening reduction amount M1, that is, m=M1;

[0111] If C1<g<G2, the gas compressor inlet guide vane opening reduction amount m is set to the preset second opening reduction amount M2, that is, m=M2;

[0112] If C2<g<G3, the gas compressor inlet guide vane opening reduction amount m is set to the preset third opening reduction amount M3, that is, m=M3;

[0113] If C3<g<G4, the reduction amount m of the inlet guide vane opening of the fuel gas compressor is set to the preset fourth reduction amount M4, that is, m=M4.

[0114] It can be understood that in the above embodiment, the goal of reducing the amount of gas is achieved by dynamically adjusting the opening of the gas compressor inlet guide vanes, avoiding the problem of reduced flow of the high and low pressure gas compressors and unstable working point of the gas compressor during switching, thereby improving the operating energy efficiency of the cycle generator set.

[0115] like Figure 2 As shown, based on the preferred embodiment of the distributed combined cycle power generation energy-saving control method in any of the above embodiments, this embodiment provides a distributed combined cycle power generation energy-saving control system, including:

[0116] Central control unit;

[0117] The gas unit control unit is connected to the central control unit via wireless signals. The gas unit control unit sets the gas unit operating parameters according to the load change.

[0118] The waste heat boiler control unit is connected to the central control unit;

[0119] The steam unit control unit is connected to the central control unit via a wireless signal. The steam unit control unit is used to set the working parameters of the steam unit.

[0120] Specifically, the central control unit includes:

[0121] The first processing module is used to obtain the steam unit operating rate v1 and the gas unit operating rate v2, and generate a real-time operating rate total value V;

[0122] The first processing module is further configured to obtain a preset total load working rate threshold V1 and generate a rate difference g;

[0123] The first correction module is used to set the reduction amount m of the inlet guide vane opening of the fuel gas compressor according to the speed difference g.

[0124] Specifically, the waste heat boiler control unit includes:

[0125] Monitoring module, which is used to collect the flue gas temperature data and flue gas flow rate data inside the waste heat boiler;

[0126] The second processing module is used to generate a smoke temperature difference and a smoke temperature mean according to the smoke temperature data collected by the monitoring module;

[0127] The third processing module is used to generate a workmanship evaluation value e based on the flue gas temperature average c and the flue gas flow rate d of the waste heat boiler;

[0128] The second control module is used to set the opening of the high-pressure regulating valve of the steam unit according to the workmanship evaluation value e.

[0129] According to the first concept of this application, by collecting the flue gas temperature difference between the front and rear sides of the waste heat boiler, the opening of the flue gas regulating damper is dynamically adjusted to match the starting speed of the waste heat boiler, thereby avoiding operational risks caused by excessive difference in the flue gas temperature of the waste heat boiler and improving the operating efficiency of the boiler.

[0130] According to the second concept of the present application, by adding a first correction module, the working parameters of the gas unit and the steam unit are corrected according to the total working efficiency, and the goal of reducing the amount of gas is achieved by dynamically adjusting the opening of the inlet guide vanes of the gas compressor, thereby improving the operating energy efficiency of the circulating power generation unit.

[0131] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present application. These improvements and replacements should also be regarded as the scope of protection of the present application.

Claims

1. A distributed combined cycle power generation energy-saving control method, characterized in that: Including: Obtain a load change instruction, generate a load change amount according to the load change instruction, and set the operating parameters of the gas turbine unit according to the load change amount; Obtain the flue gas temperature difference value in the waste heat boiler, set the operating parameters of the waste heat boiler according to the flue gas temperature difference value, and set the operating parameters of the steam turbine unit; Obtain the work power of the steam turbine unit, and determine whether to correct the operating parameters of the gas turbine unit according to the work power of the steam turbine unit; When setting the operating parameters of the waste heat boiler according to the flue gas temperature difference value, it includes: Preset a flue gas temperature difference value matrix A, set A(A1, A2, A3, A4), where A1 is the preset first flue gas temperature difference value, A2 is the preset second flue gas temperature difference value, A3 is the preset third flue gas temperature difference value, A4 is the preset fourth flue gas temperature difference value, and A1 < A2 < A3 < A4; Preset a flue gas regulating baffle opening matrix B, set B(B1, B2, B3, B4), where B1 is the preset first flue gas regulating baffle opening, B2 is the preset second flue gas regulating baffle opening, B3 is the preset third flue gas regulating baffle opening, B1 is the preset fourth flue gas regulating baffle opening, and B1 < B2 < B3 < B4; Obtain the real-time flue gas temperature difference value a in the waste heat boiler, and set the real-time flue gas regulating baffle opening b according to the real-time flue gas temperature difference value a; If A1 < a < A2, set the real-time flue gas regulating baffle opening b as the preset fourth flue gas regulating baffle opening B4, that is, b = B4; If A2 < a < A3, set the real-time flue gas regulating baffle opening b as the preset third flue gas regulating baffle opening B3, that is, b = B3; If A3 < a < A4, set the real-time flue gas regulating baffle opening b as the preset second flue gas regulating baffle opening B2, that is, b = B2; If a > A4, set the real-time flue gas regulating baffle opening b as the preset first flue gas regulating baffle opening B1, that is, b = B1; [[ID= ​ ​ 2. The distributed combined cycle power generation energy-saving control method according to claim 1, characterized in that: ​ ​ ​ ​ 3. The distributed combined cycle power generation energy-saving control method according to claim 2, characterized in that: ​ ​ ​ ​ If E1 < e < E2, set the opening degree F of the high-pressure control valve of the steam turbine unit to be between the preset first opening degree F1 of the high-pressure control valve of the steam turbine unit and the preset second opening degree F2 of the high-pressure control valve of the steam turbine unit, and F1 < f < F2; If E2 < e < E3, set the opening degree F of the high-pressure control valve of the steam turbine unit to be between the preset second opening degree F2 of the high-pressure control valve of the steam turbine unit and the preset third opening degree F3 of the high-pressure control valve of the steam turbine unit, and F2 < f < F3; If E3 < e < E4, set the opening degree F of the high-pressure control valve of the steam turbine unit to be between the preset third opening degree F3 of the high-pressure control valve of the steam turbine unit and the preset fourth opening degree F4 of the high-pressure control valve of the steam turbine unit, and F3 < f < F4; If e > E4, set the opening degree F of the high-pressure control valve of the steam turbine unit to be greater than the preset fourth opening degree F4 of the high-pressure control valve of the steam turbine unit, that is, f > F4.

4. The distributed combined cycle power generation energy-saving control method according to claim 3, characterized in that: When judging whether to correct the operating parameters of the gas turbine unit according to the work power of the steam turbine unit, it includes: Obtain the work rate v1 of the steam turbine unit and the work rate v₂ of the gas turbine unit, and generate the total real-time work rate V; Obtain the preset total load work rate threshold V1; If V > V1, generate a rate difference g, and set the reduction amount m of the inlet guide vane opening of the gas compressor according to the rate difference g; If V < V1, do not correct the operating parameters of the gas turbine unit.

5. The distributed combined cycle power generation energy-saving control method according to claim 4, characterized in that: When setting the reduction amount m of the inlet guide vane opening of the gas compressor according to the rate difference g, it includes: Preset a rate difference matrix G, set G(G1, G2, G3, G4), where G1 is the preset first rate difference, G2 is the preset second rate difference, G3 is the preset third rate difference, G4 is the preset fourth rate difference, and G1 < G2 < G3 < G4; Preset an opening reduction amount matrix M, set M(M1, M2, M3, M4), where M1 is the preset first opening reduction amount, M2 is the preset second opening reduction amount, M3 is the preset third opening reduction amount, M4 is the preset fourth opening reduction amount, and M1 < M2 < M3 < M4; If g < G1, set the reduction amount m of the inlet guide vane opening of the gas compressor to be the preset first opening reduction amount M1, that is, m = M1; If G1 < g < G2, set the reduction amount m of the inlet guide vane opening of the gas compressor to be the preset second opening reduction amount M2, that is, m = M2; If G2 < g < G3, set the reduction amount m of the inlet guide vane opening of the gas compressor to be the preset third opening reduction amount M3, that is, m = M3; If G3 < g < G4, set the reduction amount m of the inlet guide vane opening of the gas compressor to be the preset fourth opening reduction amount M4, that is, m = M4.

6. A distributed combined cycle power generation energy-saving control system, adopting the distributed combined cycle power generation energy-saving control method according to any one of claims 1 to 5, characterized in that: It includes: The central control unit; The gas turbine unit control unit, which is connected to the central control unit through a wireless signal, and the gas turbine unit control unit sets the operating parameters of the gas turbine unit according to the load change amount; The waste heat boiler control unit, which is connected to the central control unit; The steam turbine unit control unit, which is connected to the central control unit through a wireless signal, and the steam turbine unit control unit is used to set the operating parameters of the steam turbine unit.

7. The distributed combined cycle power generation energy-saving control system according to claim 6, characterized in that: The central control unit includes: The first processing module, which is used to obtain the work rate v1 of the steam turbine unit and the work rate v2 of the gas turbine unit, and generate the total real-time work rate V; The first processing module is also used to obtain a preset total load working rate threshold V1, and generate a rate difference g; A first correction module is configured to set a reduction amount m of the gas compressor inlet guide vane opening according to the rate difference g.

8. The distributed combined cycle power generation energy-saving control system according to claim 6, characterized in that: The waste heat boiler control unit includes: A monitoring module, which is used to collect the flue gas temperature data and flue gas flow rate data inside the waste heat boiler; A second processing module, configured to generate a smoke temperature difference and a smoke temperature mean according to the smoke temperature data collected by the monitoring module; The third processing module for generating a work evaluation value e based on the flue gas temperature average c and flue gas flow rate d of the waste heat boiler; The second control module is used to set the opening of the high-pressure regulating valve of the steam unit according to the workmanship evaluation value e.

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