315 results about "Combined cycle" patented technology

A thermal energy storage (TES) system converts variable renewable electricity (VRE) to continuous heat at over 900° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. Configurations of simple cycle systems and combined cycle power plants using thermal energy storage units can provide even greater efficiency and responsiveness.

The invention discloses a supercharged SOFC / GT combined cycle system and a starting method, and relates to an SOFC / GT combined cycle system and a starting method. The invention aims to solve the problem that the requirements of short starting time and high energy utilization rate cannot be met in the prior art. The system comprises a gas compressor, the gas compressor is coaxially connected with a turbine and a permanent magnet synchronous motor, an outlet of the gas compressor is connected with an inlet of a first flow divider, one outlet of the first flow divider is connected with a first battery assembly, and the other outlet of the first flow divider is connected with an inlet of a second flow divider; one outlet of the second shunt is connected with a heat exchanger assembly, the other outlet of the second shunt is connected with a combustion chamber, an outlet of the combustion chamber is connected with a turbine, an outlet of the turbine is connected with a heat exchange assembly, the heat exchange assembly is connected with the combustion chamber, the permanent magnet synchronous motor is connected with a power grid bus, and the power grid bus is connected with a second battery assembly. The first battery assembly is connected with the power grid bus. The invention belongs to the technical field of energy power equipment.

The invention relates to the technical field of artificial intelligence and thermal power plant automation, in particular to a self-adaptive analysis method and related equipment for performance degradation of a combined cycle unit, and the method comprises the steps: obtaining historical and real-time operation data of the combined cycle unit, and determining related parameters of target parameters based on the historical data. And inputting the correlation parameters into corresponding prediction models, predicting to obtain an optimal value, and obtaining a target parameter prediction value according to the optimal value. Then, according to the predicted value and the real-time data, the degradation amount is calculated, the degradation amount reflects the abrupt change condition of the target parameter under the unit operation working condition, and if the degradation amount exceeds a preset threshold value, contribution degree analysis is conducted on relevant parameters of target parameter degradation of the abnormal time node; and finally, in combination with an analysis result and the fault knowledge graph, determining a fault reason, and giving a recommended maintenance scheme.

The invention relates to the technical field of energy consumption optimization, and provides a heater energy consumption optimization method and system based on gas-steam combined cycle. The method comprises the steps that gas turbine exhaust, waste heat boiler steam and heater operation parameters are collected in real time, and a dynamic energy consumption data set is constructed; training a load prediction model based on the historical load curve and the meteorological data, and outputting future load distribution; performing multi-working-condition energy consumption simulation according to the data set and the predicted load, and generating an energy consumption characteristic topological graph and a thermal efficiency fluctuation graph; and based on the atlas, optimizing heater control parameters by taking energy consumption minimization as a target, generating an optimal control set, and regulating and controlling the running state of the heater. The technical problems that in an existing gas-steam combined cycle system, heater energy consumption control is not accurate, and efficiency fluctuation is large are solved, and the technical effects that through combination of real-time data collection and a prediction model, heater energy efficiency optimization and control parameter dynamic adjustment are achieved, and therefore energy consumption is reduced to the maximum extent, and heat efficiency is improved are achieved.

The invention discloses a fuel gas and steam combined cycle power generation system coupling fused salt heat storage and biomass energy storage, which comprises a fuel gas and steam combined cycle power generation subsystem, a fused salt heat storage and release subsystem and a biomass energy storage system, an outlet of the gas-steam combined cycle power generation subsystem is connected with the fused salt heat storage and release subsystem and the biomass energy storage system, and a smoke outlet of the biomass energy storage system is connected with the gas-steam combined cycle power generation subsystem. And the utilization efficiency of energy and the economical efficiency of the system are improved.

The invention discloses a hydrogen fuel SOFC actual combined cycle power generation system based on gas turbine pressurization, and belongs to the technical field of energy power equipment. In the starting stage, air is compressed by a gas compressor and then enters a combustion chamber to be combusted with hydrogen, exhausted gas is introduced into a turbine to do work, electric energy is provided for temperature rise before SOFC reaction through a motor, and turbine exhausted gas sequentially heats hydrogen and air at an inlet of the combustion chamber. Under the stable operation working condition, air sequentially passes through a gas compressor, a flow divider and a heat exchanger to be introduced into an SOFC cathode, hydrogen is heated through the heat exchanger and enters an SOFC anode to be subjected to an oxidation reaction, cathode and anode tail gas and supplemented gas enter a combustion chamber to be combusted, exhaust gas enters a turbine to do work and then is exhausted, and turbine exhaust gas sequentially heats hydrogen of SOFC anode inlet gas and air of cathode inlet gas; wherein the SOFC anode tail gas heats hydrogen supplemented by the combustion chamber through the heat exchanger, and the SOFC cathode tail gas heats air supplemented by the combustion chamber through the heat exchanger.

The invention discloses a gas-steam combined cycle power generation system and method coupled with thermochemical energy storage. Comprising a Ca (OH) 2 / CaO system thermochemical energy storage system, a high-pressure natural gas conveying pipeline, a natural gas differential pressure power generation system, a gas turbine power generation system, a waste heat boiler, a frequency division fluid preheater, a steam turbine power generation system, a water supply preheater, a valve A, a valve B, a valve C, an air preheater and a valve D, the Ca (OH) 2 / CaO system thermochemical energy storage system comprises a reactor body and a steam pocket, the system and the method can deeply integrate thermochemical energy storage, solar full spectrum utilization and pressure energy recovery, and meanwhile, multi-energy coupling and dynamic peak regulation can be achieved.

The invention provides a method, device and equipment for controlling the steam drum water level of a gas-steam combined cycle unit. The method comprises the steps that the opening degree of an inlet guide vane of a gas compressor, the turbine exhaust temperature, the feed water flow, the steam flow, a steam drum water level set value and the steam drum water level are obtained in real time; according to the opening degree of an inlet guide vane of a gas compressor and the exhaust temperature of a turbine, the gas turbine side feed-forward control quantity is determined; according to the steam drum water level set value and the steam drum water level, a first PID controller is adopted to determine an original feed water flow set value; according to the feed water flow, the steam flow, the original feed water flow set value and the gas turbine side feed-forward control quantity, a second PID controller is adopted to determine a first feed water adjusting valve opening instruction; and adjusting the opening degree of the feed water adjusting valve according to the first feed water adjusting valve opening degree instruction, and controlling the steam drum water level of the gas-steam combined cycle unit. According to the invention, reliable guarantee is provided for safe and efficient operation of the unit through a cooperative regulation mechanism of the gas turbine side feed-forward control quantity and three-impulse control.

The present application relates to the technical field of cooling water system control, especially to a self-shutdown control method for a closed cycle cooling water system of a gas turbine combined cycle unit. The closed cycle cooling water system comprises multiple closed water pumps and multiple closed coolers. The present application realizes full automatic control of three closed water pumps, optimizes the standby logic of the closed water pumps, sets up a primary standby function and a secondary standby function, and integrates all the three closed water pumps into the shutdown control process. Through the closed cooler shutdown process and the closed water pump shutdown process, the most suitable closed cooler and closed water pump are automatically selected for shutdown, and the shutdown of the closed cycle water system is realized in an orderly and efficient manner according to the established rules. Without the need for human judgment and operation by the operation personnel, the full automatic shutdown of the closed cycle cooling water system is realized without disturbing the stable operation state of the unit, and the labor intensity of the operation personnel is reduced, and the safety and the automation level of the unit are improved.

The application discloses a shaft-symmetrical rocket-based combined engine with a variable geometry throat, which comprises a combustion chamber and a square flow channel section in communication in an axial direction from front to back; the shell of the combustion chamber is surrounded by a bottom support bottom plate and a top plate, the bottom support bottom plate is horizontal, and the top plate is a semicircular arc shape which is arched upward; the square flow channel section is a cuboid cavity, and an upper variable structure geometry throat and a lower variable structure geometry throat which are consistent with the size of corresponding holes are embedded in the holes at the upper part and the lower part; the upper variable structure geometry throat and the lower variable structure geometry throat are both plate bodies in the shape of an inclined wedge, the tip of the inclined wedge faces the rear, and the inclined surface sides of the inclined wedge both face the cavity; the upper variable structure geometry throat and the lower variable structure geometry throat are used for changing the flow channel geometry throat area in the square flow channel section. The engine is matched with the flight state by reducing the throat area with the increase of the flight Mach number, the engine performance is improved, and the engine thrust vector adjustment can be realized.

A nuclear power plant comprising at least one nuclear reactor having a steam generator, a steam cycle including the steam generator, a first turbine fluidly coupled to the steam generator, a first condenser fluidly coupled to the first turbine, and a feedwater heater fluidly coupled to the first condenser and the steam generator, an intermediate thermal loop including the first condenser, and an evaporator, and an organic cycle including the evaporator, a second turbine fluidly coupled to the evaporator, a second condenser fluidly coupled to the second turbine, and a heat exchanger fluidly coupled to the second condenser and the evaporator.

A system, for recirculating exhaust gas includes a combined cycle power plant including a heat recovery steam generator (HRSG), a gas turbine system, and an exhaust gas recirculation assembly downstream from the HRSG for receiving the exhaust gas. The exhaust gas recirculation assembly includes a direct contact cooler (DCC) in flow communication with the gas turbine system. The system also includes a computing device(s) in communication with the power plant. The computing device(s) is configured to control the combined cycle power plant by performing processes including measuring a characteristic of the exhaust gas downstream from the exhaust gas recirculation assembly and comparing the measured characteristic of the exhaust gas to a predefined characteristic threshold or a predefined characteristic range for the exhaust gas. The computing device(s) also performs processes including adjusting operational parameters of the exhaust gas recirculation assembly, and / or a distinct portion of the combined cycle power plant.

The application relates to an IGCC system coupled with biomass and near-zero emission high-purity CO2 capture and a working method thereof, and belongs to the field of coal gasification combined cycle power generation coupled with biomass, in particular to an IGCC system coupled with biomass and near-zero emission high-purity CO2 capture and a working method thereof. The application is used for solving the problems that the existing IGCC system has low CO2 capture rate, high energy consumption, low power generation efficiency, and a large amount of nitrogen generated in the oxygen taking process and difficult to effectively utilize. The application comprises an air separation device, a gasification furnace, a sensible heat recovery device, a purification device, a gas power generation unit, a waste heat recovery unit, a steam power generation unit, a biomass fermentation device, a methane reforming unit, an adsorption separation unit and an ammonia synthesis tower. The application is based on the overall coal gasification combined cycle power generation system of post-combustion CO2 capture and oxygen-enriched combustion technology, introduces a biomass ammonia synthesis process, generates H2 and CO through biomass fermentation and reforming, utilizes N2, and improves the system efficiency.

The invention discloses a gas-steam combined cycle system with bypass waste heat recovery and a control method thereof. The gas-steam combined cycle system comprises a gas turbine, a waste heat boiler, a steam turbine (comprising a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder) and a condenser, and is additionally provided with a bypass waste heat recovery device. The device is formed by sequentially connecting a low-pressure bypass cooler, a medium-pressure bypass cooler, an ejector, a gas-liquid separator, a gas compressor and a waste heat recovery heat exchanger, the heat absorption sides of the coolers are connected in parallel and then communicated with an inlet of the ejector, and a gas-phase working medium separated by the gas-liquid separator is pressurized by the gas compressor and then enters the waste heat recovery heat exchanger to release heat; the liquid-phase working medium returns to the cooler to form circulation, and the waste heat recovery heat exchanger and the energy accumulator are coupled to store heat. The bypass steam heat is efficiently recovered and stored in the energy accumulator in the start-stop stage of the unit, so that the gas consumption of the unit is remarkably reduced, and the comprehensive utilization efficiency of energy is improved.

The application discloses a high-temperature liquid combined cycle cooling system, which comprises a water pump assembly, a siphon assembly and a return pipe, wherein the water pump assembly comprises a liquid inlet pipe, a pump and a water storage pool, the siphon assembly is connected with the water storage pool, the siphon assembly is connected with the return pipe, a confluence device is arranged at the connecting position of the liquid inlet pipe and the pump, the return pipe is inserted into the liquid inlet pipe and connected with the confluence device, the confluence device comprises a honeycomb cylinder, a confluence cone cylinder, a blocking assembly and a belt moving assembly, a plurality of liquid channels are formed in the honeycomb cylinder, the confluence cone cylinder is installed at one end of the honeycomb cylinder, a temperature probe is installed at the center position of the confluence cone cylinder, the temperature probe is electrically connected with a PLC controller installed in the honeycomb cylinder, a vortex groove is arranged on the side of the honeycomb cylinder facing the confluence cone cylinder, the blocking assembly is slidably installed in the vortex groove, a plurality of independent setting grooves are formed in the side of the honeycomb cylinder close to the vortex groove, the independent setting grooves are arranged between every two adjacent liquid channels, and the belt moving assembly is installed in the independent setting groove.

A combined cycle power generation facility of an embodiment includes: a gas turbine; a heat recovery steam generator including a high-pressure steam generation part which generates steam by using an exhaust gas of the gas turbine, and a reheat part which reheats steam; a high-pressure turbine to which the steam from the high-pressure steam generation part is introduced; an intermediate-pressure turbine provided on a downstream side of the high-pressure turbine; a reheat steam pipe connecting an outlet of the high-pressure turbine and an inlet of the intermediate-pressure turbine with the reheat part interposed therebetween; a combustor to which steam discharged from the intermediate-pressure turbine is introduced, and which combusts oxygen and hydrogen to reheat the introduced steam; a low-pressure turbine to which steam discharged from the combustor is introduced; and a condenser which changes steam discharged from the low-pressure turbine into condensed water.

The application discloses a flexible adjustable waste heat utilization hot water system and method for tail of waste heat boiler, which is suitable for the waste heat boiler configured by a gas-steam combined cycle unit, designs a combined application process route of the waste heat utilization hot water system for the tail of the waste heat boiler and a bromine cooling machine energy supply, utilizes existing condensate water, a condensate water heater and a boiler water supply system, circulates working medium through a hot water circulating pump, and realizes energy supply of the bromine cooling machine; the control mode in the system shutdown, startup and regulation stages is introduced, the working medium flow is regulated by frequency conversion and distribution regulation, the working medium temperature is regulated by low-temperature, medium-temperature and high-temperature three-stage temperature regulation, and the energy supply process of the waste heat utilization hot water system for the tail of the waste heat boiler can be flexibly adjusted.

The invention belongs to the field of energy storage, and particularly relates to an energy storage system and method based on a silicon-based ultrahigh-temperature phase change heat storage coupling gas turbine. The system comprises a silicon-based ultra-high-temperature heat storage device, an outlet of the silicon-based ultra-high-temperature heat storage device is connected with an ultra-high-temperature heat recovery device, an outlet of the ultra-high-temperature heat recovery device is connected with a circulating fan and a combustion chamber, and the circulating fan is connected with an inlet of the silicon-based ultra-high-temperature heat storage device; an outlet of the combustion chamber is connected with a gas turbine, the gas turbine is connected with a gas compressor, and the gas compressor is connected with an inlet of the ultra-high-temperature heat recovery device; an outlet of the gas turbine is connected with a waste heat boiler, and an outlet of the waste heat boiler is connected with a feed water heater and a steam turbine. The ultrahigh-temperature phase-change heat storage device with the silicon-based phase-change material as the heat storage medium is adopted, electric energy is converted into high-grade heat energy to be stored, and the efficient electricity-heat-electricity energy storage round-trip efficiency can be achieved and can reach 60% through an existing gas-steam combined cycle unit. If combined heat and power generation is considered, the energy storage efficiency can reach 85%.

The invention relates to a deep waste heat recovery coupling utilization system of a gas-steam combined cycle unit, and relates to the technical field of thermal power generation. The waste heat boiler plate heat exchanger receives the flue gas, the flue gas and the intermediate water are subjected to heat exchange treatment, and flue gas intermediate water is obtained; the absorption heat pump receives the flue gas intermediary water and heat supply network circulating water discharged by the heat supply network heat supply system, and the heat supply network circulating water is heated based on the flue gas intermediary water; the heat supply network heat supply system receives heat supply network circulating water and supplies heat to the outside based on the heat supply network circulating water. The closed circulating water system provides closed circulating water intermediate water; the gas turbine intake air heating heat exchanger receives the closed circulating water intermediate water to heat intake air of the gas turbine based on the closed circulating water intermediate water. According to the scheme, multi-stage utilization of flue gas heat is achieved, the overall utilization efficiency of energy is improved, energy waste is reduced, high-temperature flue gas is prevented from being directly discharged into the atmosphere, and the influence of heat pollution on the environment is effectively reduced.

The invention discloses a system and method for improving the summer operation performance of a gas-steam combined cycle unit, and the system is characterized in that an expanded economizer is arranged in a waste heat boiler unit of the gas-steam combined cycle unit, and is connected with the generator side of an absorption heat pump unit through a waste heat water circulation pipeline; a waste heat water circulating pump is arranged in the waste heat water circulating pipeline; an air inlet cooling heat exchanger is arranged in an air compressor inlet pipeline of a gas turbine of the gas-steam combined cycle unit, the air inlet cooling heat exchanger is further connected with the evaporator side of the absorption heat pump unit through a chilled water circulation pipeline, and a chilled water circulation pump is arranged in the chilled water circulation pipeline. The condenser side of the absorption heat pump unit is connected with a heat supply network water pipeline, and a heat supply network water circulating pump is arranged in the heat supply network water pipeline. According to the scheme, the summer peak load capacity of the gas-steam combined cycle unit is improved, cascade efficient utilization of energy is achieved, the economical efficiency and the environmental protection property are improved, and collaborative cooling and heating are achieved.

The application provides a hydrogen fuel gas turbine combined cycle device system and application of cold energy cascade utilization, which comprises a high-pressure hydrogen gas source and processing unit, a hydrogen expander unit, a hydrogen fuel processing unit of a gas turbine, a gas turbine unit power generation unit and a waste heat boiler unit power generation unit connected in sequence. In the application, high-pressure hydrogen gas from the high-pressure hydrogen gas source and processing unit is subjected to pressure energy and cold energy recycling through the hydrogen expander unit, the recycled pressure energy is expanded to do work, and the recycled cold energy is subjected to heat exchange through a heat exchanger, so that hydrogen fuel gas turbine combined cycle system power generation can be carried out more efficiently and at a lower cost, and good economic benefits and environmental benefits are achieved.

The application belongs to the technical field of combined heat and power supply, and particularly relates to a gas-steam combined cycle waste steam heat supply system, which comprises a gas turbine, a first heat exchange part connected with the gas turbine, a steam turbine connected with the first heat exchange part, a second heat exchange part and a cooling mechanism connected with the steam turbine, a user heat supply part connected with the second heat exchange part, a first valve arranged between the steam turbine and the second heat exchange part, a second valve arranged between the steam turbine and the cooling mechanism, and the cooling mechanism and the second heat exchange part being connected with the first heat exchange part. The application can realize large-area heating without extracting high-quality steam and improving the steam turbine exhaust parameter, and the second heat exchange part can bear part or all of the cooling load of the cooling mechanism, so that the power consumption of the cooling mechanism is reduced or zero, energy is saved, and the overall efficiency of the combined cycle is improved.

The utility model discloses a control device of a gas-steam combined cycle unit, which relates to the technical field of gas and comprises a gas turbine and a steam turbine, and a heat exchanger is connected between the gas turbine and the steam turbine. In the process that cold water enters the cylinder from the water inlet pipe and flows towards one end of the steam outlet pipe, when the cold water flows between the inner side of the cylinder and the outer side of the main steam passing pipe, the cold water forms internal and external conversion annular flow through flow guide of the multiple inner circulation gaps and the multiple outer circulation gaps, and therefore the cold water forms radial reciprocating flow in the flowing process; therefore, the inner layer and the outer layer of cold water are continuously changed, heat exchange of the main gas passing pipe and the gas passing branch pipes is more uniform, the phenomenon that a relatively static heat exchange layer is formed is avoided, the heat exchange efficiency of high-temperature flue gas and cold water is enhanced, and the heat exchange effect of the gas-steam combined cycle unit control device is enhanced.

The application provides a control system and method for medium-pressure steam admission in a gas-steam combined cycle unit, comprising a medium-pressure water extraction pump, a superheater, a medium-pressure bypass regulating valve, a condenser, a medium-pressure steam regulating valve, a reheater and a steam turbine, the medium-pressure water extraction pump is connected with the superheater through a pipeline, the water outlet of the superheater is connected with the condenser and the medium-pressure cylinder of the steam turbine through pipelines, the medium-pressure bypass regulating valve is arranged on the pipeline corresponding to the condenser, the medium-pressure steam regulating valve is arranged on the pipeline corresponding to the steam turbine, and the reheater is arranged between the medium-pressure steam regulating valve and the steam turbine. The control system and method for medium-pressure steam admission in the gas-steam combined cycle unit can maintain the medium-pressure drum liquid level in a safe liquid level range through the medium-pressure feedwater regulating valve, realize automatic control during medium-pressure steam admission through the opening and closing of the medium-pressure steam regulating valve and the medium-pressure bypass regulating valve, and reduce misoperation.

The utility model relates to the field of gas power generation and the technical field of compressed carbon dioxide energy storage, in particular to a compressed carbon dioxide energy storage power generation system coupled with gas-steam combined cycle, which comprises a gas-steam combined cycle system and a compressed carbon dioxide energy storage system. The compressed carbon dioxide energy storage system comprises a low-temperature tank, the output end of the low-temperature tank is sequentially connected with a first compressor, a first heat exchanger, a second compressor, a second heat exchanger and a high-temperature tank, and the output end of the high-temperature tank is sequentially connected with a first heater, a first expansion machine, a second heater, a second expansion machine and a second condenser. The output end of the second condenser is connected with the input end of the low-temperature tank; the first expansion machine and the second expansion machine are coaxially connected with a third power generator. Exhaust smoke waste heat of the gas-steam combined cycle system is used for heating carbon dioxide, meanwhile, cooling water of the condenser is used for providing a cooling medium for the compressed carbon dioxide energy storage system, and efficient cyclic utilization of energy is achieved.

The application provides a method and system for predicting main steam parameters before steam warming of a combined cycle unit, the method comprising the following steps: obtaining historical operation data of a target power generating unit, the historical operation data comprising a plurality of observable input parameters and output parameters closely related to a main steam system; constructing an NARX neural network model, training the neural network model based on the historical operation data, and obtaining a trained main steam parameter prediction model; deploying the main steam parameter prediction model on a general computing device; obtaining initial state parameters under a current working condition before starting the power generating unit, and inputting the initial state parameters into the main steam parameter prediction model; and outputting a predicted trajectory of main steam key parameters before the high-pressure bypass system is put into operation from the main steam parameter prediction model.

The invention provides an internal combustion engine-steam combined cycle power generation system for chemical waste gas recovery. The problems that in a traditional scheme, available energy is little, and energy quality is low are solved. Based on an internal combustion engine low-temperature combustion technology, heat transfer loss of a combustion chamber is reduced, waste heat energy taken away by cooling liquid is minimum, and the problem that waste heat available energy of an internal combustion engine is small is solved. Based on the ultra-lean combustion technology of the internal combustion engine, the exhaust oxygen content is increased, the exhaust temperature is reduced, and the input boundary of a downstream waste heat boiler is met. Based on the waste heat boiler graded afterburning technology, oxygen-enriched exhaust gas of an upstream internal combustion engine serves as combustion-supporting air and over-fire air of a boiler burner, graded afterburning is implemented, and the energy quality of waste heat of the internal combustion engine is greatly improved. Based on implementation of the three key technologies, the system heat efficiency of the internal combustion engine-steam combined cycle can be remarkably improved, and the energy efficiency level similar to that of the gas turbine-steam combined cycle is achieved.

This invention discloses a fully intelligent control system and method for combined cycle power units based on large-scale model analysis. The system includes a first, second, third, and fourth fully intelligent control sequential control command feedback unit, as well as a first, second, third, and fourth fully intelligent control sequential control command unit. This system and method can rapidly generate optimal control parameters, simultaneously considering system efficiency, equipment lifespan, energy consumption, and emissions targets during start-up, operation, and shutdown control, thereby improving the system's response speed to load changes.

The invention relates to the technical field of energy conversion and combined cycle, and discloses an energy supply method and system and a program product, and the method comprises the steps: obtaining the power demand load capacity, the power supply load capacity and the target energy storage capacity of a compressed air energy storage module; when the electricity demand load is smaller than the photo-thermal power supply load, photo-thermal power generation supplies power to the electric equipment and the energy storage module so as to guarantee normal operation of the energy supply system; if the sum of the electricity demand load and the energy storage target energy storage amount is smaller than the photo-thermal power supply load, photo-thermal power generation supplies power to the electric equipment, the energy storage module and the fuel synthesis module at the same time; when the electricity demand load is greater than the photo-thermal power supply load, the photo-thermal power generation and energy storage module is cooperated to supply power to the electric equipment; and if the sum of the photo-thermal power supply load and the energy storage target energy storage amount is smaller than the electricity demand load, the methanol stored in the fuel synthesis module is used for supplying power to photo-thermal power generation. Through coupling energy supply, the problem that a traditional energy supply system depends on fossil fuel, and carbon emission is generated by additional fuel is solved.

The invention discloses an overheating attemperation water control method and system with autonomous decision-making and flexible control functions, and belongs to the field of intelligent control of gas-steam combined cycle units. Comprising a first constant module, a first smaller module, a first subtraction module, a second constant module, a first larger module, a first AND module, a third constant module, a second smaller module and a first OR module. The first constant module is connected to the first smaller module; the output end of the first subtraction module and the second constant module are respectively connected to the first greater module; the first smaller module output end and the first larger module output end are respectively connected to the first AND module; the third constant module is connected to the second smaller module; the first AND module output end and the second AND module output end are respectively connected to the first OR module; and the output end of the first or module is connected to an overheat attemperation water valve forcibly-closed instruction. The requirement that the actual steam temperature is unidirectionally increased according to the preset temperature rise rate in the unit starting process is met.