13results about How to "Reduce overvoltage" patented technology

This application provides an energy storage system, including: a housing; an energy storage device housed within the housing; and a voltage limiting device, wherein a first terminal of the voltage limiting device is electrically connected to the energy storage device, and a second terminal of the voltage limiting device is electrically connected to the housing or a conductive device within the housing. This system can limit overvoltage within the energy storage device's housing while reducing the risk of thermal runaway in the energy storage system.

The application relates to the technical field of aluminum electrolytic cells, and provides a heat energy recycling treatment system for anode gas of an aluminum electrolytic cell, which comprises an aluminum electrolytic cell, a plurality of anodes are arranged in the aluminum electrolytic cell, a plurality of through holes are arranged on each anode, a gas collecting pipe connected with each through hole is arranged on the top of the anode, the gas collecting pipe is connected with an air inlet of a heat exchanger, the heat exchanger comprises a heat preservation shell, an air inlet, an air outlet, a water inlet and a water outlet are arranged on the heat preservation shell, a heat storage medium, an air pipe and a water pipe are arranged in the heat preservation shell, the two ends of the air pipe are connected with the air inlet and the air outlet respectively, the two ends of the water pipe are connected with the water inlet and the water outlet respectively, the heat storage medium is filled in the heat preservation shell, the water inlet is connected with an external cold water source, and the water outlet sends heated hot water to a user water place through a supply pipeline. The heat energy carried by the discharged anode gas can be recycled and utilized, and energy can be saved.

The application discloses a coupled inductance type ZSCB based on topology switching and a reclosing-rebreak method thereof, and the ZSCB comprises a circuit breaker topology and a control circuit. DC The anode of the thyristor T is connected with a direct current power supply V DC The cathode is connected with one end of the inductor L1, the other end of the inductor L1 is connected with one end of the inductor L2, the other end of the inductor L2 is connected with a load; S1 and S2 are connected in series and then connected in parallel between the two ends of T and L1, wherein the drain of S1 is connected with the anode of T, and the source of S2 is connected with the connection point of L1 and L2; S3 and S4 are connected in series and then connected with the source of S2 at one end and V DC The other end of the capacitor C is connected with the connection point of S3 and S4; the control circuit changes the connection mode of the capacitor before each reclosing, so that the capacitor voltage can exactly meet the required condition for the next rebreak, and the reclosing-rebreak under permanent fault is realized.

The present invention relates to a positive electrode active material for an all-solid-state battery, comprising a core portion comprising a lithium metal oxide; and a coating portion comprising a dielectric having a cubic structure on the surface of the core portion, and a positive electrode comprising same, and an all-solid-state battery.

The invention discloses a light electric arc extinction switch capable of disconnecting mutual inductor leads synchronously, and relates to the technical field of power system automation equipment. Comprising an external insulating cover and an internal arc extinguishing device. The top of the external insulating cover is provided with a first incoming line wiring assembly matched with the access of a high-voltage incoming line, and the incoming line wiring assembly comprises a vacuum switch chamber; the internal arc-extinguishing device comprises an arc-extinguishing insulating rod, a voltage release assembly and an insulating rod movement distance regulation and control assembly which are installed at the lower section of the arc-extinguishing insulating rod body, a second incoming line wiring assembly which is installed at the upper section of the arc-extinguishing insulating rod body and cooperates with equipment incoming line access, and a switch insulating block which is installed at the top of the arc-extinguishing insulating rod and cooperates with the vacuum switch chamber. And the control module is used for controlling the access and cut-off of incoming current. The light electric arc extinction switch remotely controls connection and disconnection of incoming line current, and works by taking vacuum as an arc extinction medium based on a zero arc extinction principle, so that generation and extinction of contact arcs are carried out in the vacuum.

The application discloses a network-configuration type SVG optimal configuration method considering transient voltage safety constraints, and comprises the following steps: establishing a low-voltage ride-through equivalent model of a network-configuration type new energy unit and a network-configuration type SVG control equivalent model; quantifying transient overvoltage risks by correcting a node admittance matrix; determining SVG access nodes and capacities by iteration configuration with the constraint that overvoltage does not exceed a preset limit; and establishing a multi-capacity collaborative optimal configuration model with the target of minimizing investment cost. The application can effectively inhibit transient overvoltage, reduce equipment investment cost, and is suitable for engineering planning and optimal configuration of a network-configuration type SVG in a high-proportion new energy station.

The invention discloses a power grid black-start method based on a new energy automobile battery swap station, and the method comprises the steps: constructing a weighted undirected power grid structure diagram based on the connection relation between the battery swap station and a power transmission line; performing power grid static characteristic analysis on the weighted undirected power grid structure chart to obtain a power grid layout; based on the power grid layout, performing charging optimization on the target grid frame by adopting a starting power supply and sub-grid parallel starting mode to obtain an optimized charging scheme; simulating a power grid black-start process based on the optimized charging scheme, and capturing the influence of a power grid topological structure on the power grid charging process; optimizing the black start process of the power grid by adopting community division and the modularity value to obtain an optimized black start model of the power grid; according to the method, the static and dynamic characteristics of the complex network of the power grid are analyzed, the potential of the battery swap station in the aspect of optimizing the starting power supply layout is researched, and the recovery efficiency and reliability of the power grid after a large-scale power failure accident are improved.

The present invention relates to an arc extinguishing chamber dedicated to a switching reactor and a method of using the same, wherein the arc extinguishing chamber dedicated to a switching reactor comprises an arc extinguishing chamber unit, a fast closing unit and a resistor-capacitor unit, the arc extinguishing chamber unit comprises a first insulating support tube fixedly connected with a first static contact unit and a first moving contact unit, the first static contact unit comprises a first static contact, and the first moving contact unit comprises a first moving contact arranged opposite to the first static contact; the fast closing unit comprises a second insulating support tube and a second moving contact slidably connected in the second insulating support tube, a transmission device connected to a transmission rod and driving the second moving contact to move is provided in the second insulating support tube, and a compressible static contact electrically connected to the resistor-capacitor unit is provided in the fixed seat. When the arc extinguishing chamber unit of the present invention is disconnected, the overvoltage generated during disconnection is reduced due to the input of the resistor-capacitor unit, and the generation of re-breakdown and re-ignition is avoided; when closed, the resistor-capacitor unit is isolated, and the service life of the resistor-capacitor unit is increased.

The electrode catalyst ink (1) includes a catalyst (10) including a layered double hydroxide, an organic polymer (11), and a solvent (12). The solvent (12) includes a first solvent, a second solvent, and a third solvent. The third solvent has a boiling point higher than a boiling point of the first solvent and higher than a boiling point of the second solvent. The Hansen solubility parameter distance Ra1 [MPa1 / 2] between the third solvent and the catalyst (10) and the Hansen solubility parameter distance Ra2 [MPa1 / 2] between the third solvent and the organic polymer (11) satisfy a relationship of 2.08Ra1 - 16.0 ≤ Ra2 ≤ 2.08Ra1 - 13.5.

The invention discloses the technical field of electrified railway traction power supply, and particularly discloses a train neutral section passing excitation inrush current suppression method and device and a train neutral section passing system.The train neutral section passing excitation inrush current suppression method comprises the steps that a drive-in signal generated when a train is about to drive into a neutral section is received, and a drive-in side power supply arm and a neutral section are controlled to be conducted according to the drive-in signal; the voltage of the drive-in side power supply arm, the voltage of the drive-out side power supply arm and the voltage of the neutral section are obtained, the optimal closing angle of the thyristor is obtained by calculating the integral of the voltage of the neutral section in real time, the precision of the closing angle is remarkably improved, overvoltage and overcurrent impact on a train can be reduced to the maximum extent, practicability is higher, implementation is convenient, and popularization is easy. The popularization is convenient.

Single-phase full-bridge intelligent power module based on gallium nitride power chip and manufacturing method, including ceramic substrate, power chip, drive chip, power copper surface, decoupling capacitor, printed circuit board and shell; a plurality of power copper surfaces are arranged on the ceramic substrate, gaps are left between adjacent power copper surfaces, the decoupling capacitor and the power chip are arranged on the power copper surface; the printed circuit board is covered on the ceramic substrate, and a plurality of drive chips are arranged on the printed circuit board; the ceramic substrate, the power chip, the drive chip, the power copper surface, the decoupling capacitor and the printed circuit board are arranged in the shell. The processing flow designed by the application is easy to realize the automation of power module processing and preparation, effectively reduces the preparation steps of the power module, improves the yield of the power module preparation, and the raw material cost of processing and use is low, effectively controls the production cost of the power module. At the same time, the preparation process can guarantee the electrical insulation performance and the reliability of the electrical bonding connection in the power module.

An electrode catalyst for a water electrolysis cell includes a catalyst, and a polymer of intrinsic microporosity having a Tröger's base skeleton containing a quaternary ammonium group. A water electrolysis cell includes an anode, a cathode, and an electrolyte membrane. The electrolyte membrane is disposed between the anode and the cathode. At least one selected from the group consisting of the anode and the cathode includes the electrode catalyst for water electrolysis cell.

The application discloses a kind of variable curvature variable cross-section orthogonal grid composite component autoclave forming method, the digital model of variable curvature variable cross-section orthogonal grid composite component to be formed is divided into through grid assembly, non-through grid assembly and reinforcing layer assembly;And design corresponding mold laying tooling, mold laying is carried out, then respectively pre-compaction is carried out again assembly co-solidification.The application is formed by using "soft mold+expansion silica gel" auxiliary autoclave forming, adaptive variable curvature variable cross-section orthogonal grid composite component, and the forming mode avoids the phenomena such as fiber accumulation, fiber wrinkle, fiber fracture in grid intersection area, while reducing overpressure or insufficient pressure phenomenon, improve component strength;And the forming mode manufacturing process is simple, combination between different molds is convenient, easy to demould, greatly improve production efficiency, with good application value and popularization prospect.