11 results about "Hydropower" patented technology

The invention discloses a non-steady flow simulating method for a pipe network system. The invention provides the non-steady flow simulating method which solves a non-steady flow by combining an obvious format and a hidden format and is suitable for complex pipe network systems. The method is based on a chasing method, three methods of a basic solution, a local iteration solution and a layered solution are provided for meeting the arraying modes of different pipe network systems and the dividing features of obvious and hidden format pipelines, and the hidden pipe network matrix equitation is solved by adopting a simple method. The non-steady flow simulating method for the pipe network system is suitable for the pressure pipeline systems and pressure-free drainage systems in large-scale river network non-steady flows in the transition process of a hydropower station as well as the non-steady flow simulation of an obvious full mixed flow system, and the non-steady flow simulating precision can be improved.

The invention discloses a mobile QRC (quick response code) hydropower station inspection system, comprising an intelligent system client connected to a wireless network that is connected with a firewall, the firewall is connected to a server, the server is connected to a management terminal and a central database, and display screen I is fixed to the surface of the intelligent system client. A support platform for the mobile QRC hydropower station inspection system is implemented mainly by using intelligent mobile equipment loaded with Android; as Android is highly extensible, daily inspection tasks are easily run on the corresponding intelligent mobile equipment, it is possible to carry out management and analysis according to a fault sheet uploaded by an inspector, communication is made timely with the inspector for methods of handling, an interactive platform is formed, and working and management levels of a whole team are increased accordingly.

The invention discloses an intelligent monitoring device for temperature and insulation state of a 330KV high-voltage cable in a hydropower station. The device is characterized by being provided with a central processing module unit (CPU), a data acquisition and conversion unit, a light transmitting/receiving module, an alarm output module, a plurality of optical fiber temperature sensors and a plurality of current sensors, wherein the data acquisition and conversion unit is used for transmitting digital signals to the CPU under the control of the CPU; the light transmitting/receiving module is used for transmitting electrical signals to the data acquisition and conversion unit; the alarm output module can be used for communication with a remote monitoring system; the optical fiber temperature sensors are respectively arranged at the joints of the high-voltage cable to be detected and used for connecting temperature detection signals to the light transmitting/receiving module; and thecurrent sensors are respectively arranged on joint metal sheaths of the high-voltage cable to be detected and used for connecting current detection signals to the data acquisition and conversion unit. The device is particularly suitable for safety monitoring of the 330KV high-voltage cable in the hydropower station, can realize real-time monitoring of the temperature and the insulation state of the cable in the hydropower station, and can also ensure self safety.

The invention discloses a heat pump air-conditioning unit system suitable for a high-humidity low-temperature environment of an underground hydropower station cavern. The heat pump air-conditioning unit system comprises a cooling water system, a heat pump system, a cooling (heating) system, a dehumidification system, and an air processing system, wherein the cooling water system is composed of a water intaking head, a water intaking pipe, a dirt separator, a water intaking pump, a first electric adjusting valve, a first heat exchanger and a second electric adjusting valve; the heat pump system is composed of a compressor, a four-way valve, a second heat exchanger, a first one-way valve, a first expansion valve, a second one-way valve, a second expansion valve, a first heat exchanger, a third electric adjusting valve, a third heat exchanger and a fourth electric adjusting valve; the cooling (heating) system is composed of the second heat exchanger, a frozen water pump and a surface cooler; the dehumidification system is composed of a third heat exchanger, a heating water pump, a water heater, an electric heater and a runner dehumidifying mechanism, and the air processing system is composed of the surface cooler and the runner dehumidifying mechanism. Good operation of various functions of refrigerating, heating, dehumidifying and the like of the underground hydropower station cavern at the stages in the whole year can be ensured, and a lot of energy wastes caused by dehumidification can be saved.

A hydropower station remote monitoring system comprises an upper computer monitoring layer which is connected with a local control level, the local control level comprises a touch screen which is connected with a microcomputer excitation regulator, a PLC machine, a PLB-6 microcomputer comprehensive protector and a S50 temperature inspecting instrument; the local control level is connected with the local control level of the hydropower station device to collect operation data, state and fault alarm information and upload the collected information to the upper computer monitoring layer; and the upper computer monitoring layer comprises an upper computer which is configured to store, process and display the information collected by the local control level and control the hydropower station device.

The invention discloses a cascade hydropower station optimal scheduling system and method, and a safety power grid system, and the method comprises the steps: carrying out the preliminary calculationof each power station of a cascade power station group through the predicted storage flow condition and planned output of each power station of the cascade power station group, and obtaining the stateof the cascade power station group; traversing the state sequence of each power station of the cascade power station group according to the time sequence, if the state of the current time period of the cascade power station group meets the set requirement, completing the calculation of the scheduling time period, and if not, performing water abandoning risk assessment according to the length of the pre-abandoning time, and performing output adjustment on the current time period. Through the scheme provided by the invention, each cascade power station is balanced in water abandoning risk underthe condition of meeting cascade overall operation optimization in the whole dispatching process, water abandoning is relatively reasonable, cascade water and electricity operation is optimized, andcascade water energy resources are fully utilized.

The invention discloses an actual water head-based primary frequency modulation calculation method of a hydropower generating unit. A unit opening output factor is introduced under an opening mode, afrequency/power characteristic relation is built under the opening mode, a ratio between active power change quantity of a certain water head and rated power of the generating unit is introduced intoa PID calculation program of a hydropower generating unit control system, the active power regulation accuracy of primary frequency modulation can be improved, the primary frequency modulation qualityunder the opening mode is improved, the power grid frequency control quality is improved, and the problem that active power action quantity is not correlated to the frequency due to influence of thewater head on primary frequency modulation of the hydropower generating unit in the prior art under the opening mode is solved.

The invention relates to the technical field of a micro-grid application, and discloses a black-start system and method for a small hydropower station micro-grid. The system comprises a trunk line with a plurality of loads at the tail end, a power grid branch line, an energy storage switching station, an important load power distribution room branch line and an energy storage management system, the tail end of the trunk line is connected to a bus A, the power grid branch line is connected to a bus B, the branch lines in the energy storage switching station are connected to corresponding buses in a 3/2 wiring mode, and the energy storage management system controls on and off of a switch corresponding to each branch line in the energy storage switching station. The invention also correspondingly provides a black-start method based on the system, the method automatically switches the load according to the output of the small hydropower station and the load condition, gradually recovers power supply in a hydropower-load small-capacity alternate start mode, and can prevent the line charging current and the transformer excitation surge current from being too large. Impact on a black-start main power supply is effectively reduced, and the method can be suitable for a micro-grid containing multiple hydropower stations, energy storage and multiple loads.

The invention discloses a spiral fan pressure energy water turbine. The spiral fan pressure energy water turbine includes a water inlet cabin and a water outlet cabin. A rotating cabin is arranged below the water inlet cabin, the rotating cabin includes a rotating cabin body fixedly connected with the water inlet cabin and a rotating body capable of rotating, the rotating body is arranged in the rotating cabin body, the rotating body is provided with a plurality of spiral fans are distributed at equal angles around the central axis of the rotating body, the spiral fans are arranged in a spiralmode along the rotating body, the spiral fans are concave, the outer side walls of the spiral fans are fixedly connected to the outer wall of the rotating body, a gap is formed between the rotating cabin body and the outer wall of the rotating body, and a first air pressure valve is further arranged on the rotating cabin body. The water outlet cabin is arranged below the rotating cabin, the wateroutlet cabin is fixedly connected with the rotating cabin body. According to the spiral fan pressure energy water turbine, kinetic energy generated by the rotation can be transmitted to a generator through the rotating body, so that hydraulic energy can be fully and effectively used.