35results about How to "Improve power generation stability" patented technology

The invention discloses an alternating current-direct current hybrid flexible power distribution network reliability calculation method. The method comprises the following steps that a starting pointand an end point of a reliability calculation path of a distribution unit are determined; a power distribution network reliability module is divided, wherein components weak in influence on reliability or consistent influence result are divided into a basic module; key factors of the influence on the reliability are divided into a separate block; a single line mode of a flexible direct current transmission system and a three-way parallel connection mode including flexible and straight loops are determined, a load transfer method is determined; according to the connection mode of the distribution unit, a series sub-path and the minimum path set of each calculation load point are determined, and then the outage times and power supply availability of each load point are obtained through calculation; finally, the average index value of the load points is calculated to obtain the overall reliability index of the distribution unit. Accordingly, the reliability of the power distribution network can be greatly improved, and the method can adapt to development of future distributed power supply, energy storage and direct current load in a high reliability power supply area.

The invention discloses an islanding protection method of a photovoltaic power generation system. The method is an active islanding protection technology based on dual vector angles. The voltage vector angle obtained before disturbance and the voltage vector angle obtained after disturbance are adopted by the technology, and disturbance components are extracted and blended in the Sandia islanding protection technology. The method not only improves the islanding protection performance of the photovoltaic system, but also overcomes the shortcoming of active power fluctuation caused by a traditional phase perturbation algorithm, and improves the output power performance of inverters in the normal operating process.

The invention provides a super-flexible self-generating yarn, a full-fiber-based super-flexible thermoelectric self-generating fabric and a preparation method thereof. According to the super-flexible self-generating yarn, a P-type thermoelectric material composed of PEDOT: PSS and ionic liquid is adopted to conduct coating modification on fibers or yarns, the film-forming property of PEDOT: PSS is remarkably improved, the yarn flexibility is enhanced, and meanwhile the thermoelectric property of the yarns is improved. An N-type thermoelectric material and the P-type thermoelectric material are coated on the surface of a yarn base material in an adjacent mode and are connected through electrodes to form a series thermoelectric path. The flexibility, thermoelectricity and power generation stability of the prepared full-fiber-based super-flexible thermoelectric self-power-generating fabric are remarkably improved, and an effective way is provided for the full-fiber-based super-flexible thermoelectric self-power-generating fabric. Therefore, the super-flexible self-generating yarn has relatively high popularization and application values in the fields of sensing device power supply, intelligent clothing and wearable electronic devices.

The embodiment of the invention discloses a control method and device of wave energy power generation equipment and a wave energy power generation system. The method comprises the steps of obtaining the pressure in a hydraulic pipeline, and judging whether the pressure in the hydraulic pipeline is in a preset pressure range or not; when the pressure is in the preset pressure range, determining theoptimal rotating speed of a hydraulic motor according to the pressure in the hydraulic pipeline, and controlling the rotating speed of the hydraulic motor to be the optimal rotating speed; when the pressure in the hydraulic pipeline is greater than the upper limit pressure of the preset pressure range, starting a pressure reducing valve to reduce pressure until the pressure in the hydraulic pipeline is in the preset pressure range; or when the pressure in the hydraulic pipeline is smaller than the lower limit pressure of the preset pressure range, controlling the hydraulic motor to stop rotating, and controlling an energy accumulator to store energy until the pressure in the hydraulic pipeline is in the preset pressure range. The maximization of energy conversion is realized, the conversion efficiency is improved, and the wave energy power generation equipment can stably and efficiently generate power.

The invention discloses a power generation device which comprises a wind driven generator, a hydroelectric generator, a solar generator, a first variable gear, a second variable gear, a circular flatplate, a wind plate, a floating plate, a water wheel blade, a connecting rod, anchoring equipment and a vertical shaft. According to the vertical shaft combined type floating comprehensive power generation device, two single-energy power generation devices, namely the vertical shaft fixed deflection angle type water turbine and the wind turbine with good self-starting performance, are organicallycombined, so that based on that the starting torque of the wind turbine is large, the vertical shaft water turbine is assisted to be started, and the vertical shaft water turbine can be started to rotate in any wind direction; thus, operation efficiency of water turbine is improved. The power generation device is a comprehensive power generation body and achieves diversified power generation, water and underwater all-weather power generation can be achieved at the same time, the stability and reliability of operation of a generator set are improved, the unit power generation cost is reduced, and the unit power generation efficiency is improved.

A fuel cell stack at least includes a stack body formed by stacking a plurality of power generation cells in a stacking direction and a first dummy cell provided at one end of the stack body in the stacking direction. The power generation cell includes a membrane electrode assembly. The first dummy cell includes a dummy assembly formed by stacking together three electrically conductive porous bodies each having a different surface size, a dummy resin frame member formed around the dummy assembly, and dummy separators.

The invention discloses a low-medium-time concentrating photovoltaic module, which comprises a battery module and a heat radiation module, wherein the heat radiation module comprises an interlayer water tank realizing heat radiation through water circulation and a horn antenna realizing heat radiation through radiation, the interlayer water tank is arranged at the back surface of the battery module, the horn antenna is arranged at the front surface of the battery module, and the battery module and the horn antenna are integrally formed to form a unit body mechanism. The low-medium-time concentrating photovoltaic module has the advantages that an integration technology is applied, the concentrating photovoltaic module with higher element heat radiation requirements and a temperature reduction temperature are in integral arrangement to form the module, meanwhile, two heat radiation structures are adopted, the heat radiation efficiency can be effectively improved, the electricity generating stability of a system and the element heating protection efficiency can be improved, the safety and stability requirements of light electricity generation are met, and in addition, the service life is prolonged.

A fuel cell stack at least includes a stack body including a plurality of power generation cells each having a membrane electrode assembly stacked in a stacking direction, and a first dummy cell provided at one end of the stack body in the stacking direction. A dummy structural body of the first dummy cell is joined to a dummy resin frame member through an adhesive layer which adheres a first outer peripheral portion and a second outer peripheral portion, and inner periphery of the dummy resin frame member to each other.

The invention relates to a chemical bath deposition method and a CIGS photovoltaic module preparation method. The chemical bath deposition method comprises the steps that a substrate is provided; a first functional layer and a composite material layer are respectively formed on opposite sides of the substrate, and the composite material layer comprises polymer hydrogel and magnetic nanoparticles mixed in the polymer hydrogel; the substrate with the first functional layer and the composite material layer is placed in a deposition solution, and the solution is deposited on the first functional layer to form a second functional layer; and the composite material layer is separated from the substrate. The chemical bath deposition method is adopted to the CIGS photovoltaic module preparation method. According to the chemical bath deposition method, the composite material layer is formed on one side of the substrate to be a protection layer, so that the side of the substrate is not in contact with the deposition solution; and meanwhile, the polymer hydrogel in the composite material layer swells in the reaction liquid, so that the circulation of the reaction liquid on the side of the substrate is reduced, invalid deposition of the second functional layer on the composite material layer is avoided, and the composite material layer is convenient to remove.

The invention discloses a railway truck fault diagnosis system on the basis of power sharing. The railway truck fault diagnosis system comprises N sensors, M main units and connecting circuits. The sensors and/or the main units have power generation functions; the N and the M are positive integers; power sharing ends of the N sensors and power sharing ends of the various main units are communicated with one another via the connecting circuits; the sensors with the power generation functions and/or the main units with the power generation functions are provided with anti-backward assemblies, and the anti-backward assemblies are arranged between output ends of power generation assemblies of the sensors with the power generation functions and/or the main units with the power generation functions and the power sharing ends of the sensors with the power generation functions and/or the main units with the power generation functions; local energy dissipation circuits are connected with the power sharing ends of the sensors and the main units. The railway truck fault diagnosis system has the advantages that the various sensors and the main units can keep in relatively stable voltage statesto work by the aid of power sharing between the various internal sensors, between the sensors and the main units and between the main units, and accordingly the power generation stability and the reliability of devices can be improved.