阅读说明：本技术 燃气蒸汽联合循环机组供热控制方法、装置及系统 (Heat supply control method, device and system for gas-steam combined cycle unit ) 是由 梁言凯 许明 安振源 吴莉娟 边防 侯宝 李振海 刘志会 杨耀辉 王云飞 刘洁 于 2020-07-09 设计创作，主要内容包括：本发明提供了一种燃气蒸汽联合循环机组供热控制方法、装置及系统,涉及供热控制技术领域,该方法应用于燃气轮发电机；燃气轮发电机包括转子、压气机和透平；压气机和透平沿转子相对设置；该方法包括：获取燃气轮发电机的运行参数；运行参数用于控制转子向透平方向移动；根据运行参数生成运行指令；根据运行指令控制燃气轮发电机运行,以使燃气蒸汽联合循环机供热。本发明通过运行参数控制转子向透平方向移动,从而使透平运行效率降低,燃气轮发电机排气温度升高,燃气轮发电机余热回收供热量增加,进而利用发电机余热为热网提供更多的热量,满足热负荷需求。(The invention provides a heat supply control method, a heat supply control device and a heat supply control system for a gas-steam combined cycle unit, and relates to the technical field of heat supply control; the gas turbine generator comprises a rotor, a gas compressor and a turbine; the compressor and the turbine are oppositely arranged along the rotor; the method comprises the following steps: acquiring operating parameters of a gas turbine generator; the operation parameters are used for controlling the rotor to move towards the direction of the turbine; generating an operation instruction according to the operation parameters; and controlling the gas turbine generator to operate according to the operation instruction so that the gas-steam combined cycle machine supplies heat. The invention controls the rotor to move towards the direction of the turbine through the operation parameters, thereby reducing the operation efficiency of the turbine, increasing the exhaust temperature of the gas turbine generator, increasing the heat supply amount of the waste heat recovery of the gas turbine generator, further providing more heat for a heat supply network by using the waste heat of the generator and meeting the heat load requirement.)

1. A heat supply control method of a gas-steam combined cycle unit is characterized by being applied to a gas turbine generator; the gas turbine generator comprises a rotor, a gas compressor and a turbine; the compressor and the turbine are oppositely arranged along the rotor; the method comprises the following steps:

acquiring the operating parameters of the gas turbine generator; the operation parameters are used for controlling the rotor to move towards the direction of the turbine;

generating an operation instruction according to the operation parameters;

and controlling the gas turbine generator to operate according to the operation instruction so as to enable the gas-steam combined cycle machine to supply heat.

2. The method of claim 1, wherein the gas turbine generator further comprises a combustor; the rotor sequentially penetrates through the gas compressor, the combustion chamber and the turbine.

3. The method of claim 1, wherein controlling the gas turbine generator to operate in accordance with the operating instructions comprises:

and controlling the rotor to rotate around the axial direction and translate along the axial direction according to the operation instruction.

4. A method according to claim 3, wherein the displacement of the rotor axially in the turbine direction is less than the displacement of the rotor axially in the compressor direction.

5. A gas-steam combined cycle unit heat supply control device is characterized by being applied to a gas turbine generator; the gas turbine generator comprises a rotor, a gas compressor and a turbine; the compressor and the turbine are oppositely arranged along the rotor; the device comprises:

the acquisition module is used for acquiring the operating parameters of the gas turbine generator; the operation parameters are used for controlling the rotor to move towards the direction of the turbine;

the generating module is used for generating an operating instruction according to the operating parameters;

and the control module is used for controlling the gas turbine generator to operate according to the operation instruction so as to enable the gas-steam combined cycle machine to supply heat.

6. The apparatus of claim 5, wherein the control module is specifically configured to:

and controlling the rotor to rotate around the axial direction and translate along the axial direction according to the operation instruction.

7. The apparatus of claim 6, wherein the control module is specifically configured to:

and the displacement value of the rotor moving to the turbine direction along the axial direction is smaller than the displacement value of the rotor moving to the compressor direction along the axial direction.

8. A heat supply control system of a gas-steam combined cycle unit is characterized by comprising a gas turbine generator, a waste heat boiler and a steam turbine generator; the gas turbine generator comprises the gas-steam combined cycle unit heat supply control device as claimed in any one of claims 5 to 7.

9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 4 when executing the computer program.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 4.

Technical Field

The invention relates to the technical field of heat supply control, in particular to a heat supply control method, a heat supply control device and a heat supply control system for a gas-steam combined cycle unit.

Background

In recent years, with the development of urban scale, the demand for heat load in winter is rising. The large-scale gas-steam combined cycle unit has the characteristics of cleanness, high efficiency, concentrated heat supply load and the like, is in the unique regional advantages of a heat load area of a city core, and bears the main task of city heat supply. The gas-steam combined cycle unit utilizes a waste heat boiler to collect waste heat generated during power generation of the gas turbine generator and the steam turbine generator so as to supply heat to a heat supply network. And the demand of the heat load is higher in the hot season, so that the demand of the unit on the electric load is also higher. However, the operation characteristics of the power grid in the power supply season of the power grid are limited, the whole power load of the whole power grid is not high, and the peak regulation demand of the power grid is obvious, so that the high-load operation of a unit cannot be ensured under the condition of low power load, and the heat supply capacity of the unit cannot meet the heat supply demand.

Disclosure of Invention

The invention provides a heat supply control method, device and system for a gas-steam combined cycle unit, which can improve the thermoelectric ratio of the combined cycle unit under the working condition of back pressure, improve the thermoelectric decoupling capacity and meet the heat load requirement.

In a first aspect, an embodiment of the present invention provides a heat supply control method for a gas-steam combined cycle unit, which is applied to a gas turbine generator; the gas turbine generator comprises a rotor, a gas compressor and a turbine; the compressor and the turbine are oppositely arranged along the rotor; the method comprises the following steps: acquiring the operating parameters of the gas turbine generator; the operation parameters are used for controlling the rotor to move towards the direction of the turbine; generating an operation instruction according to the operation parameters; and controlling the gas turbine generator to operate according to the operation instruction so as to enable the gas-steam combined cycle machine to supply heat.

In a second aspect, an embodiment of the present invention further provides a heat supply control device for a gas-steam combined cycle unit, which is applied to a gas turbine generator; the gas turbine generator comprises a rotor, a gas compressor and a turbine; the compressor and the turbine are oppositely arranged along the rotor; the device includes: the acquisition module is used for acquiring the operating parameters of the gas turbine generator; the operation parameters are used for controlling the rotor to move towards the direction of the turbine; the generating module is used for generating an operating instruction according to the operating parameters; and the control module is used for controlling the gas turbine generator to operate according to the operation instruction so as to enable the gas-steam combined cycle machine to supply heat.

In a third aspect, an embodiment of the present invention further provides a heat supply control system for a gas and steam combined cycle unit, where the system includes a gas turbine generator, a waste heat boiler, and a steam turbine generator; the gas turbine generator comprises any one of the gas-steam combined cycle unit heat supply control devices.

In a fourth aspect, an embodiment of the present invention further provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor, when executing the computer program, implements the heat supply control method for the gas-steam combined cycle unit.

In a fifth aspect, the embodiment of the present invention further provides a computer-readable storage medium, where a computer program for executing the heat supply control method of the gas-steam combined cycle unit is stored in the computer-readable storage medium.

The embodiment of the invention has the following beneficial effects: the embodiment of the invention provides a heat supply control scheme of a gas-steam combined cycle unit, which is applied to a gas turbine generator; the gas turbine generator comprises a rotor, a gas compressor and a turbine; the scheme includes that firstly, operation parameters of a gas turbine generator are obtained, the operation parameters are used for controlling the rotor to move towards the turbine direction, an operation instruction is generated according to the operation parameters, and then the gas turbine generator is controlled to operate according to the operation instruction, so that the gas and steam combined cycle machine supplies heat. According to the embodiment of the invention, the rotor is controlled to move towards the direction of the turbine through the operation parameters, so that the operation efficiency of the turbine is reduced, the exhaust temperature of the gas turbine generator is increased, the heat recovery and heat supply load of the gas turbine generator is increased, and further, the waste heat of the generator is utilized to provide more heat for a heat supply network, and the heat load requirement is met.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a flow chart of a heat supply control method for a gas-steam combined cycle unit according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a hydraulic lash optimization technique system provided by an embodiment of the present invention;

FIG. 3 is a diagram showing a relationship between temperature and entropy before and after switching of main and auxiliary thrust surfaces in a hydraulic clearance optimization technique according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a heat supply control system of a gas-steam combined cycle unit according to an embodiment of the invention;

FIG. 5 is a schematic diagram of a main and auxiliary thrust surface switching parameter curve of the hydraulic clearance optimization technique provided by the embodiment of the invention;

FIG. 6 is a block diagram of a heat supply control device of a gas-steam combined cycle unit according to an embodiment of the present invention;

fig. 7 is a block diagram of a computer device according to an embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

At present, the problem of wind power consumption is solved, and the load space of a thermal power generating unit is further compressed, so that more serious challenges are provided for the requirement of thermoelectric decoupling of the thermal power generating unit.

The existing Siemens 9F-grade gas steam two-driving-one combined cycle unit adopts a split-shaft arrangement mode, a gas turbine and a steam turbine are respectively provided with an independent generator, the two gas turbines use natural gas as fuel, exhaust gas of each gas turbine enters a waste heat boiler without afterburning, three-pressure natural circulation and once reheating, steam generated by the two waste heat boilers enters the steam turbine to do work after being subjected to steam combination, or the single gas turbine and the single waste heat boiler drive the steam turbine to operate one-driving-one. The steam turbine is composed of two cylinders and two steam exhausts, a high-middle pressing cylinder, a double-flow low-pressure cylinder, a non-regulation stage, middle reheating, non-regenerative steam extraction, medium-pressure steam exhaust with a first-stage regulation steam extraction and a first-stage low-pressure steam supplement. The SSS clutch is arranged between the high-pressure rotor, the medium-pressure rotor and the low-pressure rotor, and the low-pressure part can be stopped or synchronously operated with the high-pressure part and the medium-pressure part while the high-pressure part and the medium-pressure part keep operating.

In the non-heating working condition, the high-pressure, medium-pressure and low-pressure rotors are connected into a shaft through an SSS clutch (synchronous-Self-Shifting clutch), and the steam turbine operates in a pure condensation mode. When the unit is in a heat supply working condition, the steam turbine operates in a condensing mode under the condition that the maximum steam extraction quantity of the steam turbine can meet the heat supply load requirement; when the maximum steam extraction capacity of the steam turbine cannot meet the requirement of a heat supply load, the rotor of the low-pressure cylinder is disconnected with the rotor of the high-medium pressure cylinder through the SSS clutch, the high-medium pressure cylinder operates in a backpressure mode, and exhaust steam and low-pressure main steam of the high-medium pressure cylinder are all used for heating a heating network heater; under three working conditions of pure condensation, extraction condensation and back pressure, a gas turbine HCO (hydraulic clearance Optimization) system runs on a main thrust surface so as to ensure the high-efficiency running of the gas turbine.

After the heating period in winter, in order to ensure the urban heating, the gas-steam combined cycle units are switched to a backpressure mode for operation, and the thermoelectric ratio of the units reaches the maximum value under the current technical condition and is about 0.495 at the moment. Taking a set of Siemens (SIEMENS) 9F-grade two-in-one combined cycle unit as an example, the heat load can reach 2100GJ/h when the back pressure is full in winter, and the heat supply requirement can be basically met. However, when the unit is in partial load, the heat load demand cannot be met, so the thermal scheduling usually needs the spike gas-fired hot water boiler with low starting efficiency and high power consumption rate to perform alternative operation, the starting time is long, the heat gap cannot be supplemented in time, and the adjustment mode is not flexible.

Based on the above, the heat supply control method, the device and the system for the gas-steam combined cycle unit provided by the embodiment of the invention can further improve the thermoelectric ratio of the combined cycle unit under the working condition of back pressure and improve the thermoelectric decoupling capacity.

For the convenience of understanding the embodiment, a detailed description will be given to a heating control method of a gas-steam combined cycle unit disclosed in the embodiment of the invention.

The embodiment of the invention provides a heat supply control method of a gas-steam combined cycle unit, which is applied to a gas turbine generator and refers to a flow chart of the heat supply control method of the gas-steam combined cycle unit shown in figure 1; the gas turbine generator comprises a rotor, a gas compressor and a turbine; the compressor and the turbine are oppositely arranged along the rotor; the method is applied to the condition that the gas-steam combined cycle unit operates in a backpressure mode, and comprises the following steps of:

step S102, obtaining the operation parameters of the gas turbine generator.

In an embodiment of the present invention, the operation parameter may be data input by a worker, and the operation parameter is used for controlling the rotor to move towards the direction of the turbine.

It should be noted that the gas turbine generator may be a siemens 9F type gas turbine generator.

And step S104, generating an operation instruction according to the operation parameters.

In the embodiment of the invention, the operation instruction which can be identified by the control module is generated according to the manually input operation parameter.

And S106, controlling the gas turbine generator to operate according to the operation instruction so as to enable the gas-steam combined cycle machine to supply heat.

In the embodiment of the invention, the rotor of the gas turbine generator is controlled to move towards the direction of the turbine according to the operation instruction, so that when the unit is operated under the back pressure working condition in the winter heat supply period, the gas turbine HCO system is switched from the main thrust surface to the auxiliary thrust surface to operate (if the rotor of the gas turbine generator moves towards the direction of the air compressor, the state of the gas turbine HCO system is the main thrust surface operation), the thermoelectric ratio of the unit can be increased, and the thermoelectric decoupling capacity of the unit can be improved.

Referring to a relation graph of temperature and entropy before and after switching of main and auxiliary thrust surfaces in the hydraulic clearance optimization technology shown in fig. 3, the output of the combustion engine is reduced when the 4 point of the brayton cycle is increased to the 4' point. Meanwhile, the air leakage is increased due to the increase of the clearance between the top of the turbine side blade and the cylinder, so that the exhaust temperature of the gas turbine is increased, and Q is increased₁The heat supply amount by recovering the waste heat of the flue gas is increased, and the thermoelectric ratio of the unit is increased.

Under the condition that the unit receives the same power grid load instruction P, in order to maintain the constant total load, the gas turbine needs to increase the gas flow to make up for the load loss, the gas flow entering the waste heat boiler after the gas consumption is increased, and the gas production of the waste heat boiler is also increased. As shown in FIG. 3, the Rankine cycle 7 point is ramped up to 7 point' turbine load P₂The occupancy ratio increases. Because the steam turbine operates under the working condition of back pressure, the exhaust heat of the intermediate pressure cylinder is completely recovered by the heat supply network for heat supply, and the steam quantity is increased to ensure that Q is also ensured₂The heat supply of the steam turbine exhaust is increased, and the thermoelectric ratio of the unit is increased.

Therefore, when the SIEMENS 9F-level gas-steam combined cycle unit operates in a backpressure mode, the heat-electricity ratio of the unit can be increased and the heat-electricity decoupling capacity of the unit can be improved by switching the HCO system of the gas turbine to the auxiliary thrust surface for operation.

The embodiment of the invention provides a heat supply control scheme of a gas-steam combined cycle unit, which is applied to a gas turbine generator; the gas turbine generator comprises a rotor, a gas compressor and a turbine; the scheme includes that firstly, operation parameters of a gas turbine generator are obtained, the operation parameters are used for controlling the rotor to move towards the turbine direction, an operation instruction is generated according to the operation parameters, and then the gas turbine generator is controlled to operate according to the operation instruction, so that the gas and steam combined cycle machine supplies heat. According to the embodiment of the invention, the rotor is controlled to move towards the direction of the turbine through the operation parameters, so that the operation efficiency of the turbine is reduced, the exhaust temperature of the gas turbine is increased, the heat supply amount of the flue gas waste heat recovery is increased, further more heat is provided for a heat supply network by using the waste heat of the generator, and the heat load requirement is met.

The gas turbine generator also comprises a combustion chamber; the rotor passes through the gas compressor, the combustion chamber and the turbine in sequence.

In an embodiment of the invention, reference is made to the hydraulic clearance optimization technical system schematic diagram of fig. 2, which shows a cross-sectional view of the compressor, combustion chamber, turbine and rotor connections, showing only half of the cross-section, in which the compressor, combustion chamber and turbine sections below and above the rotor are not shown. The rotor is arranged through the compressor, the combustion chamber and the turbine and can translate left and right along the axial direction of the rotor.

Controlling the operation of the gas turbine generator according to the operation instruction can be executed according to the following steps:

and controlling the rotor to rotate around the axial direction and translate along the axial direction according to the operation instruction.

In an embodiment of the invention, the rotor can translate axially while rotating axially. The rotor can be translated in the direction of the turbine along the axial direction and can also be translated in the direction of the gas compressor along the axial direction, and the rotor is controlled to be translated in the direction of the turbine along the axial direction when rotating according to an operation instruction.

The displacement value of the rotor moving to the turbine direction along the axial direction is smaller than that of the rotor moving to the compressor direction along the axial direction

In the embodiment of the invention, the displacement value of the rotor axially towards the turbine direction can be 1 mm, and the displacement value of the rotor axially towards the compressor direction can be 3 mm.

The method is described below with reference to a specific embodiment.

First, the principle of increasing the heat-to-power ratio of a combined cycle unit is described as follows:

firstly, introducing the HCO principle:

the HCO adjusts the axial position of the rotor of the gas turbine through a special hydraulic oil system, and reduces energy loss of the gas turbine caused by large axial clearance.

When the gas turbine HCO is switched to the main thrust surface position, the rotor moves towards the direction of the air inlet of the air compressor, the gap between the turbine blade top of the gas turbine and the air cylinder is reduced, the turbine efficiency is increased, the gap between the blade top of the air compressor and the air cylinder is increased, and the efficiency of the air compressor is reduced. However, the increased efficiency of the turbine of the combustion engine is greater than the lost efficiency of the compressor, so the net efficiency of the unit is increased.^[4]

As shown in fig. 3, due to the characteristics of the gas turbine design, the taper α 1 of the compressor air passage is much smaller than the taper α 2 of the gas turbine, and when the rotor moves along the axial direction and the air flow moves in the opposite direction by the displacement Δ X, the gap reduction dy2 of the gas turbine is much larger than the gap increase dy1 of the compressor, so that the power increased by the gas turbine is larger than the power lost by the compressor, that is: dy2 ═ Δ X · tan (α 2); dy1 is Δ X · tan (α 1).

Actual operation parameters show that the power of the SIEMENS F (4) type gas turbine can be improved by about 3-5MW when the main thrust surface operates, and the efficiency is improved by 0.3 percentage point.

II, index analysis:

(1) the combined cycle unit thermoelectric ratio calculation formula is as follows: thermoelectric ratio Q/(Q + P × 36), where Q: heat supply amount; p: and generating capacity.

(2) The heat supply amount calculation formula is as follows: q ═ Q₁﹢Q₂Wherein Q is₁: recovering the waste heat of the flue gas to supply heat; q₂: the heat supply of the steam turbine is provided.

(3) The total load P of the unit is calculated according to the following formula: p2 XP₁+P₂(ii) a Wherein, P₁: load of the gas turbine; p₂: and (4) loading the steam engine.

As can be seen from the formula in (1): on the premise of the same electric load, the higher the thermoelectric ratio is, the larger the heat supply amount is, and the stronger the heat supply capacity is.

The total heat supply quantity of the formula in the step (2) is influenced by the heat supply quantity of the flue gas waste heat recovery and the heat supply quantity of the steam turbine exhaust, and the higher the load ratio of the steam turbine is, the larger the total heat supply quantity is.

As can be seen from the formula in (3)If the total load is the same, the steam turbine load in the combined cycle unit is increased (P)₂) In proportion, the load (P) of the combustion engine must be reduced₁) Ratio of occupation.

Thirdly, calculating the thermal performance:

1) after the gas turbine HCO is cut to the auxiliary push surface, the actual load loss of the gas turbine of the type is about 3MW, and the total loss is 6 MW. The steam-turbine ratio in the combined cycle unit is about 1/3, so the load of the steam-turbine is increased by about 2 MW; under the working condition of back pressure of the unit two-in-one, the actual thermoelectric ratio is about 4.5, and Q is set₂- - -steam turbine exhaust steam heat supply increment is Q₂"the calculation formula is: q₂2MW × thermoelectric ratio × 3.6 ═ 32.4 GJ/h.

2) In order to keep the total load unchanged, the two combustion engines need to respectively increase the load by 2MW after being cut to the auxiliary push surface. According to the historical switching curve, after the combustion engine is switched from the main push surface to the auxiliary push surface in winter, the exhaust temperature is increased from 560 ℃ to 570 ℃, and the exhaust temperature is kept constant at 60 ℃ due to the recovery of the waste heat of the exhaust smoke of the boiler. Setting auxiliary push surface Q₁- - -flue gas waste heat recovery heat supply amount is Q₁"is known from second law of thermodynamics Q ═ C × M × T: q₁＇/Q₁T ═ (570-60)/(560-60) ═ 1.02. The flue gas recovery heat supply amount is 200GJ/h when the plant is in full load, so that Q₁The maximum increment is: MaxQ₁Increment ═ Q₁＇/Q₁-1) × 200GJ/h ═ 4 GJ/h. The load regulation range of the combined cycle unit is 50-100 percent, so Q₁The increment is about 2-4 GJ/h. From the above calculations, it can be seen that the heat supply increment is mainly Q₂The increment of the steam discharging heat supply of the steam turbine is mainly, and the newly added total heat supply Q' is about 34-36 GJ/h.

Fourthly, implementation:

year 2020, month 02, day 22, 02: 00, the unit load is 450MW, and the two-in-one back pressure load lower limit operation is realized. The method is characterized in that a #1 and a #2 combustion engine HCO system are switched to an auxiliary thrust surface to operate, the operation parameter display curves of the units before and after switching are shown in FIG. 5, the horizontal axis in the curves represents time, a plurality of curves in the graphs respectively represent the trend of all data items such as total load, combustion engine exhaust temperature and the like in the table 1 along with time, and specific numerical values of all the data items in the table 1 on an HCO main thrust surface and an HCO auxiliary thrust surface can be obtained according to the graphs:

TABLE 1

According to the data, the unit two drives one to operate in a backpressure mode, the exhaust temperature of the gas turbine is increased by 10 ℃ after the HCO is cut to the auxiliary push surface, the loads of the gas turbine and the steam turbine are respectively increased by 2MW, the natural gas consumption is increased by about 350 standard square, and the heating load is increased by 30GJ/h and is basically close to a performance calculated value.

After conversion, after two combustion engines HCO are switched to the auxiliary push surface to operate, the comprehensive gas consumption of the combined cycle unit is reduced by 0.0015Nm3/KWh, the thermoelectric ratio is improved by 0.0053, and the thermoelectric decoupling capacity is further enhanced.

The full load interval can increase the heat supply capacity by about 30GJ/h, the thermoelectric ratio is improved by 0.005, and the comprehensive gas consumption is reduced by 0.0015Nm 3/KWh. Under the condition of unchanged annual utilization hours, the heat supply can be increased by about 4 ten thousand GJ, and the profit is increased by about 240 RMB.

The embodiment of the invention provides a heat supply control method, a heat supply control device and a heat supply control system for a gas-steam combined cycle unit.

The embodiment of the invention also provides a heat supply control device of the gas-steam combined cycle unit, which is described in the following embodiment. Because the principle of solving the problems of the device is similar to the heat supply control method of the gas-steam combined cycle unit, the implementation of the device can refer to the implementation of the heat supply control method of the gas-steam combined cycle unit, and repeated parts are not described again.

Referring to the block diagram of the structure of the heat supply control device of the gas-steam combined cycle unit shown in fig. 6, the device is applied to a gas turbine generator; the gas turbine generator comprises a rotor, a gas compressor and a turbine; the compressor and the turbine are oppositely arranged along the rotor; the device includes:

an obtaining module 61, configured to obtain an operating parameter of the gas turbine generator; the operation parameters are used for controlling the rotor to move towards the direction of the turbine; a generating module 62, configured to generate an operation instruction according to the operation parameter; and the control module 63 is used for controlling the gas turbine generator to operate according to the operation instruction so as to enable the gas-steam combined cycle machine to supply heat.

In one embodiment, the gas turbine generator further comprises a combustion chamber; the rotor passes through the gas compressor, the combustion chamber and the turbine in sequence.

In one embodiment, controlling operation of the gas turbine generator in accordance with the operating instructions comprises: and controlling the rotor to rotate around the axial direction and translate along the axial direction according to the operation instruction.

In one embodiment, the displacement of the rotor in the axial direction towards the turbine direction is less than the displacement of the rotor in the axial direction towards the compressor direction.

The embodiment of the invention also provides a heat supply control system of the gas-steam combined cycle unit, which comprises a gas turbine generator, a waste heat boiler and a steam turbine generator; the gas turbine generator comprises any one of the gas-steam combined cycle unit heat supply control devices.

In the embodiment of the invention, the structural schematic diagram of the heat supply control system of the gas-steam combined cycle unit shown in fig. 4 is referred, wherein the combustion engine is of a siemens 9F (4) type; also comprises 1 heating steam turbine with model number of LZC 266-12.5/0.4/545/540; the waste heat boiler is a three-pressure, non-afterburning, tail flue gas waste heat recovery, single reheating and natural circulation boiler for tin-free Huaguang production.

The second unit is arranged by dragging one shaft, and high-pressure, medium-pressure and low-pressure main steam generated by the two waste heat boilers adopts a main pipe system, and the main steam is converged to the main pipe and then enters a steam turbine to do work; if the unit carries out start-stop peak regulation of a single gas turbine or overhaul of the single gas turbine, the operation can be converted into a one-driving-one mode of one gas turbine and the steam turbine.

The steam turbine is a double-cylinder double-exhaust steam turbine, a high-middle pressure combination cylinder, a non-regulation stage, a first-stage reheating stage, a non-backheating stage, a middle pressure cylinder exhaust steam turbine and a first-stage regulation steam extraction stage with low-pressure steam supplement. The steam turbine rotor is provided with an SSS clutch, and the SSS clutch is engaged when the steam turbine operates in a pure condensing mode and a pumping condensing mode. When the heat load is higher in the heating season, the SSS clutch can be disengaged to cut off the low-pressure rotor, and the steam turbine is converted into a high-medium pressure cylinder back pressure mode to operate. The exhaust steam of the intermediate pressure cylinder and the low-pressure steam supplement are all supplied with heat by entering a heat supply network system.

The embodiment of the present invention further provides a computer device, referring to the schematic block diagram of the structure of the computer device shown in fig. 7, the computer device includes a memory 71, a processor 72, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of any one of the above-mentioned heat supply control methods of the gas-steam combined cycle unit are implemented.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the computer device described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.

The embodiment of the invention also provides a computer readable storage medium, and the computer readable storage medium stores a computer program for executing any one of the heat supply control methods of the gas-steam combined cycle unit.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.