66 results about "Steam-electric power station" patented technology

The invention relates to a method for constructing a drilled shaft of a surge chamber in a hydropower station under the condition of weak rock geology; the excavation diameter of the drilled shaft is more than or equal to 20 meters; and the depth of the drilled shaft is more than or equal to 50 meters. The method comprises the following steps: firstly, a safe prestress reinforcing measure is adopted; a prestress anchor rope is arranged in a side slope of the drilled shaft; the deep rock holes in the periphery of the drilled shaft are subjected to consolidation and grouting; the periphery of the drilled shaft is cast with reinforced concrete for locking a mouth, etc; the construction sequence of excavating the drilled shaft comprises that: a raise-boring machine drills a guide hole of phi 216 millimeters from top to bottom; the raise-boring machine enlarges and excavates a small guide well of phi 1, 400 millimeters; a slag slipping guide well of phi 2, 500 millimeters is enlarged and excavated manually from bottom to top; and the slag slipping guide well is enlarged and excavated from top to bottom. The slag slipping guide well is excavated by manual drilling and blasting; slag is naturally slipped and mechanically loaded in the bottom of the well; a large well is enlarged and excavated through drilling and blasting by a manual air drill; and the skimmed slag in a hydraulic backhoe well slips to the bottom of a passage through the slag slipping guide well and is mechanically loaded in the bottom of the well. The construction method has the characteristics of having reasonable construction arrangement, alternately and simultaneously carrying out a plurality of construction types and saving the construction period.

A method according to the invention or a corresponding device (1) provides for dividing exhaust gas (9) exiting the gas turbine into a first (11) and a second partial stream (13), for mixing the first partial stream (11) with combustion air (15), and for channeling the resulting mixture (17) to the combustion chamber (5) and the second partial stream (13) to a carbon dioxide precipitation plant (21).In an advantageous embodiment the exhaust gas (9) exiting the gas turbine (3) is previously used to generate process steam (31) for a steam turbine (33) (gas and steam power station) then cooled before the exhaust gas (9) is divided into said partial streams (11,13). Water (29) precipitating during cooling is removed.

The invention discloses an optimal operation method of main transformers based on economic equivalent analysis, which comprises the following steps of: 1, acquiring power grid operation data in real time by using a power grid economic operation assistant decision-making system, and maintaining and updating the power grid operation data; 2, estimating the operation condition of a power grid by using the power grid economic operation assistant decision-making system according to the acquired power grid operation data; 3, analyzing the loss of the main transformer of each electric power substation in the power grid; 4, analyzing the loss of the whole power grid; 5, comparing and analyzing the estimated value of the whole power grid condition and a load flow calculation value obtained in the step 4 with the power grid operation data acquired from an SCADA (Supervisory Control and Data Acquisition) system and a remote meter reading system in real time to obtain an operation scheme with theminimum main transformer loss; 6, making a decision with the power grid economic operation assistant decision-making system by using an expert system; and 7, adjusting the switching condition of eachmain transformer in the power grid by using the SCADA system.

The present invention relates to a method for increasing the efficiency of a combined gas / steam power station (10) with integrated gasification combined cycle. Said power station comprises a gas turbine compressor (14) and an air-separation unit (18) having a defined working pressure. Compressed air is removed from the gas turbine compressor (14) at a pressure level that is adapted to the working pressure of the air-separation unit (18). The removed air is then supplied to the air-separation unit (18) where the air is broken down into its individual constituents, especially oxygen and nitrogen. The nitrogen produced in the air-separation unit (18) is removed from the air-separation unit and at least a part of the removed nitrogen quantity is used as a coolant in the gas / steam power station in order to improve its efficiency.

The invention discloses a method for short-term load predicting of electric power station area, relates to the technical field of power load forecasting, in particular to a short-term load predictingmethod of a power station area. A short-term load predicting method for power stations is presented, which can accurately forecast the cross-regional load. The invention combines clustering with the neural network; for normal classes with curves below a certain threshold, the same treatment is used, You do not need to set the number of distinguished classes; At the same time, the outliers far fromall centers can be excluded to ensure that the objects in the same set have similar characteristics, while the data objects in different sets are different, because the daily load curves of the dateswith similar hidden variables are more similar, and these similar daily load curves are highly correlated. The accuracy of prediction is ensured.

A method for operating a steam power station is provided. The steam turbine power station includes at least one steam turbine and a process steam consumer, wherein a steam mass flow is subdivided into a first partial mass flow and a second partial mass. In a first operating state, the first partial mass flow is supplied to the steam turbine and the second partial mass flow is supplied to the process steam consumer. In a second operating state, at least part of the second partial mass flow is supplied to the steam turbine at least after the first turbine stages. A steam power station is also provided.

The invention relates to a method for operating a steam power station and a power plant as well as a corresponding steam power station. According to the invention, essentially all of the water that is drained from at least one pressure stage of the steam power station is collected, stored, and recirculated into the water circuit of steam power station.

The invention relates to an environment-friendly partition for an electric power station. The environment-friendly partition comprises a fence wall body, and is characterized in that a layer of non-punching metal plate covers the outer side wall of the fence wall body; a layer of vacuum glass is arranged on the inner side wall of the fence wall body. The structure is high in strength, light in weight, attractive in appearance, good in sound insulation capability and low in cost.

The invention discloses a water garbage clearing device for a hydroelectric power station. The water garbage clearing device includes a water tank seat, the water tank seat is internally provided witha front-rear communicating impurity removal cavity with a downward opening, and a gate switching assembly is arranged on the inner wall of the left side of the impurity removal cavity, wherein a rotating rod extending forward and backward is arranged in the gate switching assembly; and the front end and the rear end of the rotating rod are hinged to a longitudinal straight tooth plate extending up and down and a driven hanging rod correspondingly, a front-rear symmetrical slide is arranged on the inner wall of the right side of the impurity removal cavity, a sliding supporting rod is connected into the slide in a sliding fit mode, and synchronous plates are fixedly connected among the sliding supporting rod, the longitudinal straight tooth plate and the driven hanging rod. According to the water garbage clearing device for the hydroelectric power station, the structure is simple, a garbage collection device with front and back displacement switching is arranged, water flow is used forautomatically opening and closing an opening, it is ensured that garbage is not lost in the process of leachate lifting and the opening can be also opened automatically after reaching the specified height, and subsequent transportation and processing are convenient.

The invention relates to a method for operating a steam power station and a power plant as well as a corresponding steam power station. According to the invention, essentially all of the water that is drained from at least one pressure stage of the steam power station is collected, stored, and recirculated into the water circuit of steam power station.

The invention relates to an electric quantity distribution method with renewable energy participating in medium-and-long-term power transaction. The electric quantity distribution method comprises thefollowing steps: 1) according to clearing data of an energy market, formulating a declaration electricity price of a power generation enterprise; 2) according to a two-layer planning theory, establishing a two-layer planning model in which renewable energy participates in medium-and-long-term power transactions; and 3) solving the two-layer planning model by adopting a hybrid algorithm combiningthe discrete particle swarm and the continuous particle swarm and a nonlinear planning method, and completing the distribution of the electric quantity of the power generation enterprise and the electricity price of the power user according to the obtained optimal solution. Compared with the prior art, the electric quantity distribution method has the advantages of accurate distribution, practicability, reasonableness and the like.

The invention discloses a thermal power generating unit control method and system based on condensate throttling. In real life, a traditional thermal power generating unit control system has control delay and combustion inertia and other prominent problems. The variable load control strategy of complete sliding pressure and condensate flow regulation is adopted in the load adjusting method based on condensate throttling, rapid changes of the condensate flow within short time are controlled, within the water level adjusting range of a deaerator and a condenser, the size of a valve port is adjusted to increase or decrease the condensate flow value, the steam exhaust amount adjustment of a steam turbine in a low-pressure heater and the deaerator is achieved, and loads of one part of unit can be obtained or released within short time. The use efficiency of a traditional condensate control system is improved, in the energy-saving management control of a thermoelectric unit power station, the large energy-saving can be achieved, economic benefits are generated, and the actual application value is achieved.

A steam power station is provided having a steam boiler which can be fired by a combustion device in a combustion chamber and has an air preheater which is suitable for removing thermal energy from the flue gas of the combustion chamber in order to transfer the thermal energy to a first air flow, the first air flow being fed back to the combustion chamber at least partly as combustion air. The steam power station also has a high-temperature battery which can likewise be supplied with air from the first air flow.

The invention provides a hydroelectric power station and belongs to the technical field of hydroelectric power facilities. The hydroelectric power station comprises a retaining dam, a hydraulic turbine generator and an energy concentration device, wherein the retaining dam is constructed on an upstream river and is used for intercepting and lifting the upstream river; the hydraulic turbine generator is mounted at the downstream; the energy concentration device is used for leading water of the upstream river, which is intercepted by the retaining dam, to the hydraulic turbine generator so that the hydraulic turbine generator generates power; a water outlet of the hydraulic turbine generator is communicated with the upstream river. The hydroelectric power station is characterized in that the energy concentration device is an energy collection pipe; one end of the energy collection pipe is connected and communicated with a water inlet of the retaining dam, and the other end of the energy collection pipe is connected with the hydraulic turbine generator. The hydroelectric power station has good landform adaptability and does not damage farmlands, mountain forests and villages and towns; the hydroelectric power station is suitable for natural river systems with great falls, is low in construction cost and can meet the requirements of nearby grid-connected generation; the investment and the resources can be saved; the energy collection pipe tends to be maintenance-free, and the good economical and cheap effects are reflected.

The invention aims to provide a focusing thermoelectric power station for renewable energy resource facility agriculture. Solar power generation is organically and integrally combined with the facility agriculture through a facility agricultural building; the building design of the facility agriculture and the design of the solar focusing thermal power generation simultaneously meet the requirements of the agriculture and the solar power generation; a solar focusing thermal power generation system is arranged on the roof or wall of the building; and the breeding, planting and cultivating are performed at different regions in the facility agriculture building; in this way, the integrated design of the renewable energy resource collection, the facility building and the facility agriculture is realized; and thus the facility agriculture with the renewable energy resource as the core substitutes the conventional facility agriculture with the conventional energy resource as the core, and the solar focusing thermal power generation is realized.

The present invention provides an automatic combustor control system for steam-power station. Said automatic combustor control system includes; valve controller for measuring and controlling manifold pressure of combustor; power quantity supply device for measuring and supplying power quantity produced by power generator,; central control table for setting and providing reference data for controlling ignition and extinction of combustor and monitoring error status of combustor; and processor for making the reference data provided by central control table be compared with at least one of data inputted by valve controller for measuring local manifold pressure or supplied by power quantity supply device, and for automatically controlling ignition and extinction of combustor.

The invention relates to a hydraulic control system for quick water inlet gates of a hydroelectric power station. The hydraulic control system is characterized by comprising a first quick water inlet gate control panel, a second quick water inlet gate control panel and a quick water inlet gate control common panel; the quick water inlet gate control common panel carries out automatic and manual start and stop control on two pressure oil pumps and an oil replenishing pump of the hydroelectric power station, pressure build-up valve control and sound alarm control, monitors oil pressure, oil temperature, filtering blockage, an oil level of a main oil tank and an oil level of an oil replenishing tank and carries out hot standby switching on two power sources; the first quick water inlet gate control panel and the second quick water inlet gate control panel respectively complete manual and automatic operation for slowly opening, slowly closing and stopping the first and second quick water inlet hydraulic gates and operation for quickly closing the first and second quick water inlet hydraulic gates; the first quick water inlet gate control panel and the second quick water inlet gate control panel respectively monitor front and back water levels, the opening and full-open and full-close stroke limiting of the first and second quick water inlet hydraulic gates. The hydraulic control system has the advantages that the reliability of the quick water inlet hydraulic gates of units of the hydroelectric power station can be improved, convenience in future maintenance for the control system and future maintenance safety of the control system can be enhanced.

A method for operating a steam power station is provided. The steam turbine power station includes at least one steam turbine and a process steam consumer, wherein a steam mass flow is subdivided into a first partial mass flow and a second partial mass. In a first operating state, the first partial mass flow is supplied to the steam turbine and the second partial mass flow is supplied to the process steam consumer. In a second operating state, at least part of the second partial mass flow is supplied to the steam turbine at least after the first turbine stages. A steam power station is also provided.

The invention discloses an integration type hydroelectric power station, wherein a liquid column of water inlet and a liquid column of water outlet are arranged at a same liquid level, between which n pressure conduits are connected in parallel, m water wheel generating set are connected in series along the n pressure conduits, the other end of the pressure conduit connects with the water inlet or water outlet liquid column or the hydraulic head. The apparatus in accordance with the invention can fully utilize the water resource, and change the single machine surplus water power generation into group machines integration generation.

The invention relates to a power supply device for establishing a solar photovoltaic power station and a hydroelectric power station integrally in a reservoir, and belongs to the technical field of clean new energy application. A first solar cell is mounted on a pile in a shallow water area in the reservoir, currents generated through the fact that sunlight irradiates the first solar cell are input into a first photovoltaic controller through electric leads, the currents output from the first photovoltaic controller are input into a first junction station through electric leads and are input into a second junction station through electric leads, a second solar cell is mounted on a hull in a deepwater area in the reservoir, currents generated through the fact that sunlight irradiates the second solar cell are input into a second photovoltaic controller through electric leads and are adjusted, the currents output from the second photovoltaic controller are input into a third junction station through electric leads, the currents output from the third junction station are input into the second junction station through electric leads, then are input into an inverter through electric leads, and are input into a power distribution room, the currents output from the power distribution room are input into a power supply network through power transmission cables and power transmission towers, and the currents are supplied to electrical appliances.

The invention relates to a circulating water hydroelectric power station constructed through interaction of self weight of water bodies and buoyance. The circulating water hydroelectric power station comprises a partitioning reservoir, a water injection pump, a water injection pipe, a water supply pipeline, a water tank, a water delivering pipe, a water turbine, a water pumping cylinder body, a water replacing box body, a gravity cylinder body, a buoyance box body, a water pumping cylinder body piston disk, a gravity cylinder body piston disk, piston disk connecting rods and a water replacing box body drain pipe. Through the adoption of the technical scheme adopted by the circulating water hydroelectric power station disclosed by the invention, under the premise of without dependence on or drawing support from other outside force, and without consumption of energy sources such as fossil, only the original self weight of the water bodies and the characteristics of the buoyance are utilized, the self weight of the water bodies and the buoyance mutually utilize the force of the other part in a device system which is artificially mounted, so that after the water bodies and required water quantity continuously and automatically operate to any required height which is artificially set to form a required drop height, and then through a water guiding device system and a water delivering pipeline, the water bodies and the water quantity flow past the water turbine, so that the water turbine acts to produce electric energy.

The invention relates to an analysis method for the cost of titanium alloy tube plates for an electric power station. A modern computer technology is utilized to analyze a relationship between the elastic modulus and the cost of a titanium alloy used in an electric power station, an artificial neural network is combined to establish a model, a neural network construction and a topological structure are determined, an MATLAB toolset is utilized to construct a prediction model, and then a relationship between chemical elements or physical properties and the elastic modulus in titanium alloy is analyzed. Finally, a genetic algorithm is utilized to optimize the prediction model, an optimal solution is found, the lowest cost is found, and then the largest elastic modulus can be obtained. According to the invention, the data analysis efficiency is increased, the accuracy of a data processing process is greatly improved, titanium alloy raw materials with the lowest cost and the largest elastic modulus is found quickly, purchase directions of raw materials are made clear, materials attractive in price and quality are purchased, and safety and stability of a power grid or other industries are guaranteed.

The present invention relates to a method comprising the following steps: providing (34) a first signal (Sl) showing a reduction of the current power level (PEL) of the generator (12), generating (36) a second signal (KU) showing a short circuit interruption as a function of the first signal (Sl), resetting (38) the second signal (KU) after a predetermined time period (TKU) and blocking (38) the second signal for a predetermined period of time (TSPKU), stopping and subsequently starting (40) the turbine (14) as a function of the second signal (KU), generating (42) a third signal (LAW) showing a load rejection as a function of the first signal (Sl), and permanently stopping (44) the turbine (14) as a function of the third signal (LAW).

The invention discloses a rapid protection system of an electric power substation. The electric power substation comprises a main transformer, a back-up transformer, a bus, a bus coupling cabinet and a plurality of feeder line cabinets. The rapid protection system of the electric power substation is characterized by comprising a first current transformer, a high-voltage side switch, a low-voltage side switch, switch arc light probes, a first arc light relay extender, a second arc light relay extender, a bus coupling current transformer and a main control unit. The rapid protection system of the electric power substation has the advantage of being capable of performing power-off protection on the electric power substation according to matching of a detected arc light signal and detected current when any space among three independent space which are arranged inside the feeder line cabinets or the bus coupling cabinet is broken down due to the fact that a switch chamber, a bus chamber and a cable chamber which are arranged inside every feeder line cabinet and the bus coupling cabinet are provided with the switch arc light probes.

The invention relates to a sand blocking type corrugated pipe expansion joint for a hydroelectric power station, and relates to a structure of a water diversion pressure pipeline stretching compensator of the hydroelectric power station. The sand blocking type corrugated pipe expansion joint comprises a corrugated pipe and a guide cylinder, wherein the corrugated pipe is sleeved on the guide cylinder, one end of the corrugated pipe is fixedly connected with an upstream steel pipe, and the other end of the corrugated pipe is fixedly connected with a downstream steel pipe; and one end of the guide cylinder is fixedly connected with the downstream steel pipe, and an elastic packing is arranged between the guide cylinder and the corrugated pipe. The sand blocking type corrugated pipe expansion joint provided by the invention has the advantages that the structure is simple, the cost is low, the manufacture and installation are convenient, the service life is long, the sand blocking type corrugated pipe expansion joint can automatically prevent sand grain sundries from entering the gap between the guide cylinder and the corrugated pipe, and meanwhile, the sand blocking type corrugated pipe expansion joint can guarantee not to generate excessive compressive stress on the corrugated pipe; and the sand blocking type corrugated pipe expansion joint can be widely used to circulating pipelines such as water conservancy, electric power and chemical industry.

The invention discloses an environmental-friendly wall for an electric power station. The environmental-friendly wall comprises a hollow supporting frame and a plurality of supporting pipes. The hollow supporting frame is made of steel reinforcements. The supporting pipes are arranged on the inner side of the supporting frame, and are arranged in the thickness direction of the supporting frame. The supporting pipes are in plug-in connection in a rectangular cavity between adjacent steel reinforcements of the supporting frame. Each supporting pipe adopts a hollow quadrangular structure. Flanges, which are distributed at intervals, are respectively arranged on the side walls of the adjacent supporting pipes. The length direction of the flanges is parallel to that of the supporting pipes. The flanges on the adjacent supporting pipes are arranged in a staggered manner. A concrete layer is arranged on the outer side of the supporting frame. Sound insulation layers are arranged on the inner side of the concrete layer. According to the invention, by adoption of the hollow supporting pipes arranged on the inner side of the supporting frame, good sound insulation and heat insulation effects can be achieved.

The invention relates to a method for increasing the efficiency of a combined gas / steam power station (10) with integrated gasification combined cycle. Said power station comprises a gas turbine compressor (14) and an air-separation unit (18) having a defined working pressure. Compressed air is removed from the gas turbine compressor (14) at a pressure level that is adapted to the working pressure of the air-separation unit (18). The removed air is then supplied to the air-separation unit (18) where the air is broken down into its individual constituents, especially oxygen and nitrogen. The nitrogen produced in the air-separation unit (18) is removed from the air-separation unit and at least a part of the removed nitrogen quantity is used as a coolant in the gas / steam power station in order to improve its efficiency.

The invention belongs to the technical field of hydroelectric generation, and particularly relates to a dam-free linked hydroelectric power station with multiple conduits converging flow. The dam-free linked hydroelectric power station with the multiple conduits converging the flow is high in adaptability, low in investment cost, convenient to build, short in construction time and high in feasibility. The dam-free linked hydroelectric power station comprises the multiple power-generation water conduits (1), the flood discharging water conduits (2), a drop gate (3) and power generators (4). The power-generation water conduits (1) are all arranged in a river, the power generators (4) are connected to the power-generation water conduits (1) in series, and the flood discharging water conduits (2) are mounted above the power-generation water conduits (1). The drop gate (3) is located at water inlets of the power-generation water conduits (1) and water inlets of the flood discharging water conduits (2), the area of the drop gate (3) is at least equal to the cross sectional area of the stacked power-generation water conduits (1), and the drop gate (3) is moved up and down through a power device.