Wind-light-hydrogen gas turbine combined cycle multi-energy complementary power generation system and regulation and control method thereof

Abstract

The invention discloses a wind-light-hydrogen gas turbine combined cycle multi-energy complementary power generation system and a regulation and control method thereof. The system comprises a gas turbine power generation device, a hydrogen generation device, a renewable energy source conversion device, a steam power generation device and a power management system. The gas turbine power generation device comprises a gas compressor, a combustion chamber, a turbine and a first generator. The hydrogen generating device comprises an electrolytic bath, an electrolytic bath alternating current / direct current converter and a hydrogen storage tank; the steam power generation device comprises a waste heat boiler, a steam turbine high-pressure cylinder, a steam turbine intermediate-pressure cylinder, a steam turbine low-pressure cylinder and a second power generator. The renewable energy source conversion device comprises a photovoltaic generator set, a photovoltaic direct current / alternating current converter, a wind generating set and a wind power transformer; energy storage peak regulation is achieved through hydrogen production and hydrogen storage through water electrolysis, the problem that an external power grid is unstable due to output fluctuation of renewable energy sources is solved, and meanwhile the problem that supply and demand are unbalanced due to load fluctuation is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of multi-energy complementary circulating power generation, in particular to a wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system and a regulation method thereof. BACKGROUND

[0002] Renewable energy represented by wind power and photovoltaic power has strong time intermittency, power fluctuation and spatial dispersion due to multiple influences of geography and environmental factors. As the scale of renewable energy grid connection continues to expand, higher stability and flexibility are required for power grids, and large-scale renewable energy consumption problem is increasingly prominent. In recent years, the world's three major gas turbine manufacturers have developed their own hydrogen-doped micro-mixing burners. Hydrogen energy, as an ideal clean energy carrier, is an excellent energy storage form with advantages such as flexible energy storage scale and cross-seasonal energy storage, and can play a role in smoothing renewable energy fluctuations and improving renewable energy consumption in power systems. Based on the hydrogen-electricity coupling energy conversion mode, the large-scale development and flexible and efficient utilization of renewable energy become an important development direction of power systems. At present, scholars have proposed a hydrogen energy storage unit based on a hydrogen gas turbine, which directly realizes hydrogen-electricity-heat interconnection through a hydrogen gas turbine, and further constructs an electricity-heat-hydrogen multi-energy complementary system. Renewable energy electrolysis of water to produce hydrogen provides a technical path for renewable energy consumption, and the hydrogen-doped fuel combustion of the gas turbine undertakes the task of hydrogen-to-electricity conversion. The "electrolysis tank-gas turbine" realizes the hydrogen-electricity coupling energy conversion mode.

[0003] In recent years, domestic commercial projects using hydrogen-doped fuel for gas turbines have also been carried out, for example, the first commercial operation of Siemens SGTA05 marine gas turbine in a combined heat and power project in Binzhou, Shandong by Jerry Petroleum and Natural Gas Engineering Co., Ltd. successfully realized hydrogen-doped combustion of the gas turbine for power generation and grid connection. Based on "green hydrogen" produced by renewable energy, a new "electricity-hydrogen-electricity" conversion mode is realized through a gas turbine, which is also a key development project in green and low-carbon advanced technology. Although the above theoretical research and practical application involve the use of hydrogen-doped fuel for hydrogen-doped gas turbines, there is no clear indication of the structure design and regulation method for the hydrogen system internal flow structure and the control of the hydrogen-doped proportion of the fuel.

[0004] Therefore, it is urgent for those skilled in the art to solve the problem of providing a wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system and a regulation method thereof to solve the difficulties in the prior art. SUMMARY

[0005] The purpose of the present application is to provide a wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system and a regulation method thereof, which realizes renewable energy consumption internally, avoids energy waste in low load demand state, and maintains excellent variable load performance of the gas turbine.

[0006] To achieve the above object, the present application provides the following scheme:

[0007] A wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system, comprising a gas turbine power generation device, a hydrogen generation device, a renewable energy conversion device, a steam power generation device, and a power management system; the flue gas output end of the gas turbine power generation device is connected to the flue gas input end of the steam power generation device; the power output ends of the gas turbine power generation device, the renewable energy conversion device, and the steam power generation device are respectively electrically connected to an alternating current bus; the power input end of the hydrogen generation device is electrically connected to the alternating current bus; the gas turbine power generation device, the renewable energy conversion device, the steam power generation device, and the hydrogen generation device are electrically connected to the alternating current bus, and together constitute a local power supply network.

[0008] The gas turbine power generation device is used for generating power based on natural gas or natural gas mixed with hydrogen to supply power to the alternating current bus and provide high-temperature flue gas to the steam power generation device; the hydrogen generation device is used for hydrogen storage peak shaving, and electrolyzes water using alternating current bus power in the local power supply network to generate hydrogen, which is used by the gas turbine in the form of natural gas mixed with hydrogen combustion, so as to realize the hydrogen storage peak shaving process of electricity-hydrogen-electricity; the renewable energy conversion device is used for generating power based on wind power and photovoltaic power to supply power to the alternating current bus; and the steam power generation device is used for generating power based on steam power to supply power to the alternating current bus.

[0009] Preferably, the gas turbine power generation device comprises a compressor, a combustion chamber, a turbine, a first generator, and an isolation switch one; the turbine, the combustion chamber, the compressor, and the first generator are coaxially connected in sequence; air is compressed by the compressor and then enters the combustion chamber to participate in combustion; high-temperature and high-pressure working medium discharged from the combustion chamber drives the turbine to rotate, thereby driving the first generator to generate power; and the first generator is electrically connected to the alternating current bus through the isolation switch one.

[0010] Preferably, the hydrogen generation device comprises an electrolytic cell, an electrolytic cell alternating current / direct current converter, a hydrogen storage tank, and an isolation switch two; the power input end of the electrolytic cell alternating current / direct current converter is electrically connected to the alternating current bus through the isolation switch two; the electrolytic cell alternating current / direct current converter outputs direct current to supply power to the electrolytic cell; the electrolytic cell is used for electrolyzing water to generate hydrogen; the hydrogen output end of the electrolytic cell is provided with a hydrogen shunt valve; the hydrogen shunt valve is connected to the combustion chamber through a first pipeline and connected to the hydrogen storage tank through a second pipeline; a straight-through hydrogen flow control valve is arranged on the first pipeline; a hydrogen storage tank inlet flow control valve is arranged on the second pipeline; the hydrogen storage tank is communicated with the combustion chamber through a third pipeline; and a hydrogen storage tank outlet flow control valve is arranged on the third pipeline; the first pipeline is merged with a pipeline through which natural gas enters the combustion chamber; and the third pipeline is merged with a pipeline through which natural gas enters the combustion chamber.

[0011] Preferably, a natural gas flow control valve is arranged on the pipeline through which the natural gas enters the combustion chamber, the straight-through hydrogen flow control valve on the first pipeline cooperates with the natural gas flow control valve to regulate and control; the hydrogen storage tank outlet flow control valve on the third pipeline cooperates with the natural gas flow control valve to regulate and control the proportion of hydrogen and natural gas in the pipeline through which the natural gas enters the combustion chamber.

[0012] Preferably, the steam power generation device comprises a waste heat boiler, a steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder, a second generator, and a disconnector three; the turbine flue gas outlet is further connected with a waste heat boiler flue gas inlet to discharge high-temperature flue gas to the waste heat boiler; a waste heat boiler steam outlet is connected with the steam turbine high-pressure cylinder, and the steam turbine high-pressure cylinder, the steam turbine medium-pressure cylinder, and the steam turbine low-pressure cylinder are coaxially connected with the second generator; the second generator is electrically connected to an AC bus through the disconnector three;

[0013] The steam turbine low-pressure cylinder outlet is further connected with a condenser, and the condenser outlet is connected with the waste heat boiler inlet; the steam flows in the pipeline from the waste heat boiler through the steam turbine high-pressure cylinder, and then returns to the waste heat boiler, and the waste heat boiler outputs reheated steam to the steam turbine medium-pressure cylinder and the steam turbine low-pressure cylinder; the steam discharged from the steam turbine low-pressure cylinder flows to the condenser through the pipeline.

[0014] Preferably, the renewable energy conversion device comprises a photovoltaic generator set, a photovoltaic DC / AC converter, a disconnector four, a wind turbine generator set, a wind power transformer, and a disconnector five;

[0015] The photovoltaic generator set is electrically connected with the photovoltaic DC / AC converter; the wind turbine generator set is electrically connected with the wind power transformer; the photovoltaic DC / AC converter is electrically connected to the AC bus through the disconnector four; and the wind power transformer is electrically connected to the AC bus through the disconnector five.

[0016] Preferably, the electrolytic tank, the first generator, the photovoltaic DC / AC converter, the wind power transformer, and the second generator are connected with a power management system through a data bus, the power management system monitors the working state of the connected devices and the power grid load demand in real time, determines the execution command according to the operation logic method, and sends an instruction signal to the gas turbine generator device, the hydrogen generation device, the renewable energy conversion device, and the steam power generation device in real time.

[0017] A control method of a wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system based on any one of the above, the power management system controls the working state of the gas turbine generator device, the hydrogen generation device, the renewable energy conversion device, and the steam power generation device according to the operation logic, and the operation state of the above devices is summarized as:

[0018] Case one: the power generated by the local power grid fluctuates with the load demand of the grid, the load rate of the gas turbine power generation device and the steam turbine power generation device runs within the adjustment range; at this time, the photovoltaic generator set and the wind power generator set are running normally, the disconnecting switch four and the disconnecting switch five are closed, the power management system monitors the output power of the renewable energy conversion device, adjusts the load rate of the gas turbine power generation device and the steam turbine power generation device according to the load condition of the grid, and the gas turbine power generation device and the steam turbine power generation device run to generate electricity following the load fluctuation, the disconnecting switch one and the disconnecting switch three are closed; the disconnecting switch two is disconnected, and the hydrogen generating device does not work;

[0019] Case two: the power generated by the local power grid fluctuates with the load demand of the grid, the gas turbine power generation device and the steam turbine power generation device run at the minimum load rate; at this time, the photovoltaic generator set and the wind power generator set are running normally, the disconnecting switch four and the disconnecting switch five are closed; the hydrogen generating device starts to work, the disconnecting switch two is closed; the gas turbine power generation device and the steam turbine power generation device run at the minimum load rate, the disconnecting switch one and the disconnecting switch three are closed; the power management system monitors the output power of the renewable energy conversion device, and adjusts the working power of the hydrogen generating device according to the load condition of the grid.

[0020] Case three: the output power of the renewable energy conversion device has met the load demand, the power generated by the local power grid fluctuates with the load demand of the grid, and the gas turbine power generation device and the steam turbine power generation device stop running; at this time, the disconnecting switch one and the disconnecting switch three are disconnected; the hydrogen generating device starts to work, the disconnecting switch two is closed; the power management system monitors the output power of the renewable energy conversion device, and adjusts the working power of the hydrogen generating device according to the load condition of the grid.

[0021] Preferably, the hydrogen mixing ratio of the gas turbine and the working state adjustment of the hydrogen generating device include the following cases:

[0022] In case one, the local power grid meets the load demand, the hydrogen generating device does not work, the hydrogen shunt valve, the straight-through hydrogen flow control valve and the hydrogen tank inlet flow control valve are closed; if there is hydrogen in the hydrogen tank, the hydrogen tank outlet flow control valve is opened, the natural gas flow control valve is opened, the natural gas flow control valve and the hydrogen tank outlet flow control valve are adjusted following the working condition of the gas turbine, and the natural gas hydrogen mixing ratio is adjusted; if there is no hydrogen in the hydrogen tank, the hydrogen tank outlet flow control valve is closed, and the natural gas flow control valve adjusts the flow according to the working condition of the gas turbine.

[0023] Preferably, the hydrogen mixing ratio of the gas turbine and the working state adjustment of the hydrogen generating device also include:

[0024] In case two, the hydrogen production device works, the flow rate of the mixed fuel and the hydrogen mixing ratio are adjusted by controlling the natural gas flow control valve and the straight-through hydrogen flow control valve; if the hydrogen use flow rate is less than the production flow rate, the hydrogen shunt valve and the hydrogen storage tank inlet flow control valve are opened, part of the hydrogen is shunted, and the remaining hydrogen is stored in the hydrogen storage tank; if the hydrogen use flow rate is greater than the production flow rate, the hydrogen shunt valve and the hydrogen storage tank inlet flow control valve are closed, and the hydrogen storage tank outlet flow control valve is opened, and the hydrogen in the hydrogen storage tank is used for supplement, and when there is no hydrogen in the hydrogen storage tank, the natural gas flow control valve is adjusted; in case three, the hydrogen production device works, the hydrogen produced is stored in the hydrogen storage tank through the hydrogen shunt valve, at this time the gas turbine power generation device and the steam power generation device do not work, and the natural gas flow control valve is closed.

[0025] According to the specific embodiments provided by the present application, the following technical effects are disclosed:

[0026] (1) The wind-solar-hydro gas turbine combined cycle multi-energy complementary power generation system and the operation method provided by the present application realize multi-energy complementary power generation of renewable energy by coupling the wind turbine set and the photovoltaic turbine set with the gas turbine combined cycle unit in the system hierarchical structure design; the hydrogen circulation in the hydrogen system and the dynamic adjustment of the hydrogen mixing ratio of the mixed fuel are realized by the electrolytic tank, the hydrogen storage tank and the fuel pipeline valve. The hydrogen internal circulation control method allows the gas turbine to operate using pure natural gas and also allows the gas turbine to operate using hydrogen-mixed fuel, the supply state of the hydrogen is decoupled from the operation state of the gas turbine, the flexibility of hydrogen use is greatly improved, and the characteristics of hydrogen-mixed combustion of the gas turbine are fully utilized.

[0027] (2) The multi-energy complementary system internally realizes renewable energy consumption, avoids energy waste in a low load demand state, maintains excellent variable load performance of the gas turbine, widens the power output range of the system, and improves the ability of the system to adapt to external load changes; the hydrogen is combusted as a non-carbon fuel to replace part of the natural gas fuel in the internal circulation, further reduces the proportion of carbon-containing energy used in the multi-energy complementary system, and is beneficial to achieving lower degree of carbon emission; the gas turbine is kept in a high-efficiency working interval as much as possible, and the system output power down interval is further reduced on the premise of reducing the sacrifice of efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0029] Figure 1 A wind-solar-hydro gas turbine combined cycle multi-energy complementary power generation system structure diagram is provided.

[0030] Figure 2 The working logic diagram for the system operation case one of the present application;

[0031] Figure 3 The working logic diagram for the system operation case two of the present application;

[0032] Figure 4 The working logic diagram for the system operation case three of the present application;

[0033] Wherein, 1-compressor, 2-combustion chamber, 3-turbine, 4-natural gas flow control valve, 5-hydrogen storage tank outlet flow control valve, 6-straight-through hydrogen flow control valve, 7-hydrogen storage tank, 8-hydrogen flow valve, 9-hydrogen storage tank inlet flow control valve, 10-electrolytic cell, 11-electrolytic cell AC / DC converter, 12-first generator, 13-photovoltaic generator set, 14-photovoltaic DC / AC converter, 15-wind turbine generator set, 16-wind power transformer, 17-waste heat boiler, 18-turbine high pressure cylinder, 19-turbine medium pressure cylinder, 20-turbine low pressure cylinder, 21-steam condenser, 22-second generator, 23-chimney, 24-power management system, 25-isolation switch two, 26-isolation switch one, 27-isolation switch four, 28-isolation switch five, 29-isolation switch three. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0036] As shown in the drawings, Figure 1 A wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system includes a gas turbine power generation device, a hydrogen generation device, a renewable energy conversion device, a steam power generation device, and a power management system 24. The flue gas output end of the gas turbine power generation device is connected to the flue gas input end of the steam power generation device. The power output ends of the gas turbine power generation device, the renewable energy conversion device, and the steam power generation device are respectively electrically connected to an AC bus. The power input end of the hydrogen generation device is electrically connected to the AC bus. The gas turbine power generation device, the renewable energy conversion device, the steam power generation device, and the hydrogen generation device are electrically connected to the AC bus to form a local power supply network.

[0037] The gas turbine power generation device is used for generating electricity based on natural gas or natural gas hydrogen blending to supply power to an alternating current bus and provide high-temperature flue gas to a steam power generation device; the hydrogen generation device is used for hydrogen storage peak shaving, electrolyzes water to generate hydrogen using alternating current bus power inside a local power grid, and the hydrogen is used by the gas turbine in a natural gas hydrogen blending combustion manner to realize an electricity-hydrogen-electricity hydrogen storage peak shaving process; the renewable energy conversion device is used for generating electricity based on wind power and photovoltaic power to supply power to the alternating current bus; and the steam power generation device is used for generating electricity based on steam power to supply power to the alternating current bus.

[0038] Further, the gas turbine power generation device comprises a compressor 1, a combustion chamber 2, a turbine 3, a first generator 12 and an isolation switch one 26; the turbine 3, the combustion chamber 2, the compressor 1 and the first generator 12 are coaxially connected in sequence; air is compressed by the compressor 1 and then enters the combustion chamber 2 to participate in combustion; high-temperature and high-pressure working medium discharged from the combustion chamber 2 after combustion drives the turbine to rotate, thereby driving the first generator 12 to generate electricity; and the first generator 12 is electrically connected to the alternating current bus through the isolation switch one 26.

[0039] Still further, the hydrogen generation device comprises an electrolytic cell 10, an electrolytic cell alternating current / direct current converter 11, a hydrogen storage tank 7 and an isolation switch two 25; the power input end of the electrolytic cell alternating current / direct current converter 11 is electrically connected to the alternating current bus through the isolation switch two 25; the electrolytic cell alternating current / direct current converter 11 outputs direct current to supply power to the electrolytic cell 10; the electrolytic cell 10 is used for electrolyzing water to generate hydrogen; the hydrogen output end of the electrolytic cell 10 is provided with a hydrogen shunt valve 8; the hydrogen shunt valve 8 is connected to the combustion chamber 2 through a first pipeline and connected to the hydrogen storage tank 7 through a second pipeline; a straight-through hydrogen flow control valve 6 is arranged on the first pipeline; a hydrogen storage tank inlet flow control valve 9 is arranged on the second pipeline; the hydrogen storage tank 7 is communicated with the combustion chamber 2 through a third pipeline; a hydrogen storage tank outlet flow control valve 5 is arranged on the third pipeline; the first pipeline is merged with a pipeline through which natural gas enters the combustion chamber 2; and the third pipeline is merged with the pipeline through which natural gas enters the combustion chamber 2.

[0040] Still further, a natural gas flow control valve 4 is arranged on the pipeline through which natural gas enters the combustion chamber; the straight-through hydrogen flow control valve 6 on the first pipeline and the natural gas flow control valve 4 cooperate to control the proportion of hydrogen and natural gas in the pipeline through which natural gas enters the combustion chamber 2; and the hydrogen storage tank outlet flow control valve 5 on the third pipeline and the natural gas flow control valve 4 cooperate to control the proportion of hydrogen and natural gas in the pipeline through which natural gas enters the combustion chamber 2.

[0041] Further, the steam power generation device comprises a waste heat boiler 17, a steam turbine high-pressure cylinder 18, a steam turbine medium-pressure cylinder 19, a steam turbine low-pressure cylinder 20, a second generator 22, and a disconnector 29; wherein the turbine 3 is connected to the waste heat boiler 17 at the flue gas outlet, and the high-temperature flue gas is discharged into the waste heat boiler 17; the steam outlet of the waste heat boiler 17 is connected to the steam turbine high-pressure cylinder 18, and the steam turbine high-pressure cylinder 18, the steam turbine medium-pressure cylinder 19, and the steam turbine low-pressure cylinder 20 are coaxially connected to the second generator 22; and the second generator 22 is electrically connected to the AC bus through the disconnector 29.

[0042] Further, the steam power generation device comprises a waste heat boiler 17, a steam turbine high-pressure cylinder 18, a steam turbine medium-pressure cylinder 19, a steam turbine low-pressure cylinder 20, a second generator 22, and a disconnector 29; wherein the turbine 3 is connected to the waste heat boiler 17 at the flue gas outlet, and the high-temperature flue gas is discharged into the waste heat boiler 17; the steam outlet of the waste heat boiler 17 is connected to the steam turbine high-pressure cylinder 18, and the steam turbine high-pressure cylinder 18, the steam turbine medium-pressure cylinder 19, and the steam turbine low-pressure cylinder 20 are coaxially connected to the second generator 22; and the second generator 22 is electrically connected to the AC bus through the disconnector 29.

[0043] Further, the steam power generation device comprises a waste heat boiler 17, a steam turbine high-pressure cylinder 18, a steam turbine medium-pressure cylinder 19, a steam turbine low-pressure cylinder 20, a second generator 22, and a disconnector 29; wherein the turbine 3 is connected to the waste heat boiler 17 at the flue gas outlet, and the high-temperature flue gas is discharged into the waste heat boiler 17; the steam outlet of the waste heat boiler 17 is connected to the steam turbine high-pressure cylinder 18, and the steam turbine high-pressure cylinder 18, the steam turbine medium-pressure cylinder 19, and the steam turbine low-pressure cylinder 20 are coaxially connected to the second generator 22; and the second generator 22 is electrically connected to the AC bus through the disconnector 29.

[0044] Further, the steam power generation device comprises a waste heat boiler 17, a steam turbine high-pressure cylinder 18, a steam turbine medium-pressure cylinder 19, a steam turbine low-pressure cylinder 20, a second generator 22, and a disconnector 29; wherein the turbine 3 is connected to the waste heat boiler 17 at the flue gas outlet, and the high-temperature flue gas is discharged into the waste heat boiler 17; the steam outlet of the waste heat boiler 17 is connected to the steam turbine high-pressure cylinder 18, and the steam turbine high-pressure cylinder 18, the steam turbine medium-pressure cylinder 19, and the steam turbine low-pressure cylinder 20 are coaxially connected to the second generator 22; and the second generator 22 is electrically connected to the AC bus through the disconnector 29.

[0045] Further, the electrolytic tank 10, the first generator 12, the photovoltaic DC / AC converter 14, the wind power transformer 16, and the second generator 22 are connected to the power management system 24 through a data bus, the power management system 24 monitors the working state of the connected equipment and the power grid load demand in real time, determines the execution command according to the operation logic method, and sends an instruction signal to the gas turbine power generation device, the hydrogen production device, the renewable energy conversion device, and the steam power generation device in real time.

[0046] Specifically, the mixed fuel supply is jointly controlled by the natural gas flow control valve 4, the hydrogen storage tank outlet flow control valve 5 and the straight-through hydrogen flow control valve 6, and the flow of different mixed fuels and the hydrogen mixing ratio of different mixed fuels are adapted by adjusting the opening degrees of different valves; the storage and use of hydrogen are jointly controlled by the straight-through hydrogen flow control valve 6, the hydrogen shunt valve 8 and the hydrogen storage tank inlet flow control valve 9, hydrogen does not need to participate in the system circulation through the external hydrogen storage tank and hydrogen transportation device outside the system, and hydrogen becomes an internal circulation working medium in the system; the photovoltaic generator set 13 and the wind power generator set 15 are components of renewable energy power generation in the multi-energy complementary system, and the first generator 12, the second generator 22, the photovoltaic generator set 13 and the wind power generator set 15 are jointly formed into an integral whole through the internal power grid of the system, and the system internally consumes surplus power to produce hydrogen through the electrolytic cell 10 and the electrolytic cell AC / DC converter 11, so as to realize the overall adaptation of the system to external load.

[0047] Specifically, the application further discloses a control method of the wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system, which adjusts the working mode of the hydrogen generation device, the output path of the hydrogen and the composition ratio of the fuel input into the gas turbine power generation device, so as to realize efficient operation of the wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system under variable load.

[0048] Case one: the power generated by the local power grid fluctuates with the load demand of the power grid, and the load rate of the gas turbine power generation device and the steam turbine power generation device is within the adjustment range; at this time, the photovoltaic generator set and the wind power generator set are normally operated as shown in Figure 2 The power management system 24 monitors the output power of the renewable energy conversion device, adjusts the load rate of the gas turbine power generation device and the steam power generation device according to the load of the power grid, and the gas turbine power generation device and the steam power generation device operate to generate power following the load fluctuation, the isolation switch one 26 and the isolation switch three 29 are closed, and the isolation switch two 25 is disconnected, so that the hydrogen generation device does not work.

[0049] Case two: the power generated by the local power grid fluctuates with the load demand of the power grid, and the gas turbine power generation device and the steam turbine power generation device operate at the minimum load rate; at this time, the photovoltaic generator set and the wind power generator set are normally operated as shown in Figure 3 The hydrogen generation device is started and works, and the isolation switch two 25 is closed; the gas turbine power generation device and the steam power generation device operate at the minimum load rate, and the isolation switch one 26 and the isolation switch three 29 are closed; the power management system monitors the output power of the renewable energy conversion device, and adjusts the working power of the hydrogen generation device according to the load of the power grid, so as to match the external power grid load demand and the output power of the local power grid.

[0050] Case three: the output power of the renewable energy conversion device has met the load demand, the local power supply network generates power fluctuating with the grid load demand, the gas turbine power generation device and the steam turbine power generation device stop running; as shown in the figure, the disconnecting switch one 26 and the disconnecting switch three 29 are disconnected; the hydrogen production device starts to work, and the disconnecting switch two 25 is closed; the power management system monitors the output power of the renewable energy conversion device, adjusts the working power of the hydrogen production device according to the grid load condition, so as to match the external grid load demand and the output power of the local power supply network. Figure 4

[0051] Further, the hydrogen mixing ratio of the gas turbine and the working state adjustment of the hydrogen production device include the following cases:

[0052] In case one, the local power supply network outputs to meet the electrical load demand, the hydrogen production device does not work, the hydrogen shunt valve 8, the straight-through hydrogen flow control valve 6 and the hydrogen storage tank inlet flow control valve 9 are closed; if there is hydrogen in the hydrogen storage tank 7, the hydrogen storage tank outlet flow control valve 5 is opened, the natural gas flow control valve 4 is opened, the natural gas flow control valve 4 and the hydrogen storage tank outlet flow control valve 5 are adjusted following the working condition of the gas turbine, and the hydrogen mixing ratio of natural gas is adjusted; if there is no hydrogen in the hydrogen storage tank 7, the hydrogen storage tank outlet flow control valve 5 is closed, and the natural gas flow control valve 4 is adjusted following the working condition of the gas turbine.

[0053] Further, the hydrogen mixing ratio of the gas turbine and the working state adjustment of the hydrogen production device include the following cases:

[0054] In case two, the hydrogen production device works, the mixed fuel flow and the hydrogen mixing ratio are adjusted by controlling the natural gas flow control valve 4 and the straight-through hydrogen flow control valve 6, and the mixed fuel is supplied to the gas turbine; if the hydrogen use flow is less than the production flow, the hydrogen shunt valve 8 and the hydrogen storage tank inlet flow control valve 9 are opened, part of the hydrogen is shunted, and the remaining hydrogen is stored in the hydrogen storage tank 7; if the hydrogen use flow is greater than the production flow, the hydrogen shunt valve 8 and the hydrogen storage tank inlet flow control valve 9 are closed, the hydrogen storage tank outlet flow control valve 5 is opened, and the hydrogen in the hydrogen storage tank 7 is used for supplement; when there is no hydrogen in the hydrogen storage tank 7, the natural gas flow control valve 4 is adjusted to change the hydrogen mixing ratio of the mixed fuel, so that the fuel supply always meets the working condition of the gas turbine; in case three, the hydrogen production device works, the hydrogen produced is stored in the hydrogen storage tank through the hydrogen shunt valve 8, at this time, the gas turbine power generation device and the steam power generation device do not work, and the natural gas flow control valve 4 is closed.

[0055] The wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system provided by the application utilizes the characteristic that the gas turbine can burn hydrogen-mixed fuel, constructs a hydrogen internal circulation path of "electricity-hydrogen-electricity", and forms continuity in the production, storage and use of hydrogen.

[0056] ​The wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system operation method provided by the application can use pure natural gas to operate the gas turbine or use hydrogen mixed fuel to operate the gas turbine, the hydrogen supply state is decoupled from the gas turbine operation state, the hydrogen storage and use flow can be dynamically adjusted, the hydrogen mixing ratio of the mixed fuel used by the gas turbine is continuously adjustable, and different devices of the system are in different working states under different load requirements.

[0057] Those skilled in the art can clearly understand from the description of the above embodiments that the embodiments can be realized by means of software and necessary general hardware platforms, and of course, can also be realized by hardware. Based on such understanding, the above technical solutions, essentially or in the contribution to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0058] The principles and implementation manners of the application are described by applying specific examples in the present application, and the above embodiment descriptions are only used to help understand the method of the application and its core idea; meanwhile, for those skilled in the art, according to the idea of the application, the specific implementation manners and application ranges will have changes. In conclusion, the content of the present application should not be understood as a limitation of the application.

Claims

1. A wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system, characterized in that, The application relates to a local power supply network, which comprises a gas turbine power generation device, a hydrogen production device, a renewable energy conversion device, a steam power generation device and a power management system; a flue gas output end of the gas turbine power generation device is connected with a flue gas input end of the steam power generation device; power output ends of the gas turbine power generation device, the renewable energy conversion device and the steam power generation device are respectively electrically connected with an alternating current bus; a power input end of the hydrogen production device is electrically connected with the alternating current bus; the gas turbine power generation device, the renewable energy conversion device, the steam power generation device and the hydrogen production device are electrically connected with the alternating current bus and jointly form the local power supply network. The gas turbine power generation device is used for generating power based on natural gas or natural gas mixed with hydrogen to supply power to the alternating current bus and provide high-temperature flue gas to the steam power generation device; the hydrogen production device is used for hydrogen storage peak regulation; water is electrolyzed by using alternating current power in the local power supply network to produce hydrogen; the hydrogen is used by being combusted in the form of natural gas mixed with hydrogen by the gas turbine, so that an electricity-hydrogen-electricity hydrogen storage peak regulation process is realized; the renewable energy conversion device is used for generating power based on wind power and photovoltaic power to supply power to the alternating current bus; and the steam power generation device is used for generating power based on steam power to supply power to the alternating current bus.

2. The wind-solar-hydrogen fuel gas turbine combined cycle multi-energy complementary power generation system according to claim 1, characterized in that, The gas turbine power generation device comprises a compressor, a combustion chamber, a turbine, a first generator and an isolation switch one; the turbine, the combustion chamber, the compressor and the first generator are coaxially connected in sequence; air is compressed by the compressor and then enters the combustion chamber to participate in combustion; high-temperature and high-pressure working medium discharged from the combustion chamber drives the turbine to rotate and drives the first generator to generate power; and the first generator is electrically connected to the alternating current bus through the isolation switch one.

3. The wind-solar-hydrogen fuel gas turbine combined cycle multi-energy complementary power generation system according to claim 2, characterized in that, The hydrogen production device comprises an electrolytic cell, an electrolytic cell alternating current / direct current converter, a hydrogen storage tank and an isolation switch two; the power input end of the electrolytic cell alternating current / direct current converter is electrically connected to the alternating current bus through the isolation switch two; the electrolytic cell alternating current / direct current converter outputs direct current to supply power to the electrolytic cell; the electrolytic cell is used for electrolyzing water to produce hydrogen; a hydrogen output end of the electrolytic cell is provided with a hydrogen shunt valve; the hydrogen shunt valve is connected to the combustion chamber through a first pipeline and connected to the hydrogen storage tank through a second pipeline; a straight-through hydrogen flow control valve is arranged on the first pipeline; a hydrogen storage tank inlet flow control valve is arranged on the second pipeline; the hydrogen storage tank is communicated with the combustion chamber through a third pipeline; a hydrogen storage tank outlet flow control valve is arranged on the third pipeline; the first pipeline is combined with a pipeline for inputting natural gas into the combustion chamber; and the third pipeline is combined with the pipeline for inputting natural gas into the combustion chamber.

4. The wind-solar-hydrogen fuel gas turbine combined cycle multi-energy complementary power generation system according to claim 3, characterized in that, A natural gas flow control valve is arranged on the pipeline for inputting natural gas into the combustion chamber; the straight-through hydrogen flow control valve on the first pipeline and the natural gas flow control valve are matched and controlled; and the hydrogen storage tank outlet flow control valve on the third pipeline and the natural gas flow control valve are matched and controlled.

5. The wind-solar-hydrogen fuel gas turbine combined cycle multi-energy complementary power generation system according to claim 4, characterized in that, The steam power generation device comprises a waste heat boiler, a steam turbine high-pressure cylinder, a steam turbine medium-pressure cylinder, a steam turbine low-pressure cylinder, a second generator, and a disconnector three; wherein the turbine flue gas outlet is also connected with a waste heat boiler flue gas inlet, and high-temperature flue gas is discharged to the waste heat boiler; the waste heat boiler steam outlet is connected with the steam turbine high-pressure cylinder, and the steam turbine high-pressure cylinder, the steam turbine medium-pressure cylinder, and the steam turbine low-pressure cylinder are coaxially connected with the second generator; the second generator is electrically connected to an AC bus through the disconnector three; It also comprises a condenser connected with the steam turbine low-pressure cylinder outlet, and the condenser outlet is connected with the waste heat boiler inlet; steam flows in the pipeline from the waste heat boiler through the steam turbine high-pressure cylinder, and then returns to the waste heat boiler, and the waste heat boiler outputs reheated steam to the steam turbine medium-pressure cylinder and the steam turbine low-pressure cylinder; steam discharged from the steam turbine low-pressure cylinder flows to the condenser through the pipeline.

6. The wind-solar-hydrogen fuel gas turbine combined cycle multi-energy complementary power generation system according to claim 5, characterized in that, The renewable energy conversion device comprises a photovoltaic generator set, a photovoltaic DC / AC converter, a disconnector four, a wind turbine generator set, a wind power transformer, and a disconnector five; The photovoltaic generator set is electrically connected with the photovoltaic DC / AC converter; the wind turbine generator set is electrically connected with the wind power transformer; the photovoltaic DC / AC converter is electrically connected to the AC bus through the disconnector four; and the wind power transformer is electrically connected to the AC bus through the disconnector five.

7. The wind-solar-hydrogen fuel gas turbine combined cycle multi-energy complementary power generation system according to claim 6, characterized in that, The electrolytic tank, the first generator, the photovoltaic DC / AC converter, the wind power transformer, and the second generator are connected with a power management system through a data bus, the power management system monitors the working state of the connected equipment and the power grid load demand in real time, determines the execution command according to the operation logic method, and sends an instruction signal to the working state of the gas turbine power generation device, the hydrogen generation device, the renewable energy conversion device, and the steam power generation device in real time.

8. A method for regulating a wind-solar-hydrogen gas turbine combined cycle multi-energy complementary power generation system according to any one of claims 1-7, characterized in that, The power management system controls the working state of the gas turbine power generation device, the hydrogen generation device, the renewable energy conversion device, and the steam power generation device according to the operation logic, and the above device operation states are summarized as follows: Case one: the local power supply grid generates power fluctuating with the power grid load demand, and the load rate of the gas turbine power generation device and the steam turbine power generation device operates within the adjustment range; at this time, the photovoltaic generator set and the wind turbine generator set operate normally, the disconnector four and the disconnector five are closed, the power management system monitors the output power of the renewable energy conversion device, adjusts the load rate of the gas turbine power generation device and the steam power generation device according to the power grid load condition, the gas turbine power generation device and the steam power generation device operate to generate power following the load fluctuation, the disconnector one and the disconnector three are closed, the disconnector two is disconnected, and the hydrogen generation device does not work; Case two: the local power grid generates power fluctuates with the grid load demand, the gas turbine generator and steam turbine generator run at the minimum load rate; at this time the photovoltaic generator and wind turbine generator are running normally, the disconnecting switch four and disconnecting switch five are closed; the hydrogen generating device starts to work, the disconnecting switch two is closed; the gas turbine generator and steam turbine generator run at the minimum load rate, the disconnecting switch one and disconnecting switch three are closed; the power management system monitors the output power of the renewable energy conversion device, and adjusts the working power of the hydrogen generating device according to the grid load condition; Case three: the output power of the renewable energy conversion device has met the load demand, the local power grid generates power fluctuates with the grid load demand, the gas turbine generator and steam turbine generator stop running; at this time the disconnecting switch one and disconnecting switch three are disconnected; the hydrogen generating device starts to work, the disconnecting switch two is closed; the power management system monitors the output power of the renewable energy conversion device, and adjusts the working power of the hydrogen generating device according to the grid load condition.

9. The method of claim 8, wherein the method further comprises: The hydrogen mixing ratio of the gas turbine and the working state adjustment of the hydrogen generating device include the following cases: In the case one, the local power grid outputs to meet the electrical load demand, the hydrogen generating device does not work, the hydrogen shunt valve, the straight-through hydrogen flow control valve and the hydrogen storage tank inlet flow control valve are closed; if there is hydrogen in the hydrogen storage tank, the hydrogen storage tank outlet flow control valve is opened, the natural gas flow control valve is opened, the natural gas flow control valve and the hydrogen storage tank outlet flow control valve are adjusted according to the working condition of the gas turbine, and the natural gas hydrogen mixing ratio is adjusted; if there is no hydrogen in the hydrogen storage tank, the hydrogen storage tank outlet flow control valve is closed, and the natural gas flow control valve is adjusted according to the working condition of the gas turbine.

10. The method of claim 9, wherein the method further comprises: The hydrogen mixing ratio of the gas turbine and the working state adjustment of the hydrogen generating device also include: In the case two, the hydrogen generating device works, the natural gas flow control valve and the straight-through hydrogen flow control valve are controlled to adjust the flow and hydrogen mixing ratio of the mixed fuel; if the hydrogen usage flow is less than the production flow, the hydrogen shunt valve and the hydrogen storage tank inlet flow control valve are opened, part of the hydrogen is shunted, and the remaining hydrogen is stored in the hydrogen storage tank; if the hydrogen usage flow is greater than the production flow, the hydrogen shunt valve and the hydrogen storage tank inlet flow control valve are closed, the hydrogen storage tank outlet flow control valve is opened, and the hydrogen in the hydrogen storage tank is used for supplement; when there is no hydrogen supplement in the hydrogen storage tank, the natural gas flow control valve is adjusted; in the case three, the hydrogen generating device works, the generated hydrogen is stored in the hydrogen storage tank through the hydrogen shunt valve, at this time the gas turbine generator and steam turbine generator do not work, and the natural gas flow control valve is closed.

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