12results about How to "Avoid frequent movements" patented technology

The utility model discloses a power supply disc suitable for a high temperature environment, which is characterized in that the power supply disc comprises a leakage protection switch and a thermal protection switch, and the thermal protection switch is connected in series in a circuit and is arranged in a heat insulation box. The frequent action of power panel thermal protection is solved, and the working efficiency is effectively improved. And after treatment, the working requirements of 220V power supply discs in various high-temperature environments can be met.

The invention relates to the technical field of under-voltage protection, in particular to an under-voltage protection circuit and a high-voltage integrated circuit using the same, in the under-voltage protection circuit, when an under-voltage fault judgment module judges that an under-voltage fault occurs, an under-voltage fault signal is generated to drive an under-voltage time adaptation module to correspondingly generate a clock signal according to the duration of the under-voltage fault signal; the under-voltage frequency selection module reduces the frequency of the clock signal in stages according to the under-voltage value of the power supply voltage to generate a filtering clock signal, and the under-voltage value is in direct proportion to the frequency of the filtering clock signal; the under-voltage protection trigger module is used for not acting when the duration of the received filtering clock signal is less than the filtering trigger moment, and starting filtering from the filtering trigger moment and generating an under-voltage protection action signal if the duration is greater than or equal to the filtering trigger moment; therefore, the clock signal is used for replacing the level to trigger undervoltage protection, and filtering is achieved to avoid false triggering. And meanwhile, various under-voltage faults are adapted by changing the duration and frequency of the clock signal, so that the under-voltage protection precision is improved.

The invention provides a real-time scheduling method and device for flexible resources of a distribution network, and belongs to the technical field of operation control of a power system. The method comprises the steps that a distribution network flexible resource real-time scheduling model is constructed, the distribution network flexible resource real-time scheduling model is composed of an objective function and constraint conditions, distribution network flexible resources comprise a common generator, a new energy unit, a hydropower station and stored energy, and the objective function is used for scheduling the new energy unit and the hydropower station on the basis that the adjustment capacity is met; the number of resources adjusted at the current moment is minimum, and meanwhile adjustment economy is considered; and solving the distribution network flexible resource real-time scheduling model to obtain the scheduling output of each generator in the distribution network at the current moment. According to the invention, the flexible adjustment capability of various resources in the distribution network is utilized to provide the supporting capability for the superior power grid, and the number of the adjusted resources is reduced as much as possible, so that frequent actions of the resources are avoided, and the overall operation safety and economy of the distribution network are ensured.

The invention relates to the field of wind power generation, in particular to a wind turbine generator yaw static error correction method and system based on a multi-beam laser radar. The method comprises the following steps: S1, scanning a wind field area in front of an impeller of a generator set through a multi-beam wind measurement laser radar mounted in a cabin of the wind turbine generator set to obtain parameter information of a plurality of spatial points; s2, performing fitting calculation on the parameter information system to obtain a fitting circle representing a horizontal wind vector of the wind field area, and solving the fitting circle to obtain a free flow wind direction; s3, the free flow wind direction is compared with the current cabin orientation, and a real-time static yaw error angle is obtained through calculation; generating a yaw control instruction according to a preset control strategy; s5, solving and calculating the fitting circle to obtain a transverse wind component, and correcting the yaw control instruction; according to the method, the control instruction is generated through the control strategy to drive the yaw system to perform dynamic compensation, so that the wind turbine generator can continuously maintain the optimal windward attitude, and the stability and long-term effectiveness of control are ensured.

The present invention provides a collaborative control method and device suitable for substation voltage control, the method comprising: obtaining all regulating devices and corresponding collaborative control terminals in the substation; wherein the regulating devices include reactive regulating devices and voltage regulating devices; the collaborative control terminal corresponding to the reactive regulating device is the first control terminal; the collaborative control terminal corresponding to the voltage regulating device is the second control terminal; numbering each collaborative control terminal according to the corresponding node voltage array; controlling the collaborative control terminal according to the power factor value and the voltage value, combined with preset parameters, until the preset conditions are met. Compared with the prior art, the collaborative control terminal is divided into a first control terminal and a second control terminal, and according to the power factor value of the first control terminal and the voltage value of the second control terminal, coordinated control based on the substation is achieved without major upgrades to the power grid, thereby improving the reliability and stability of the power grid.

The application discloses a kind of virtual synchronous generator secondary frequency modulation adaptive control method and system.For the frequency deviation of virtual synchronous generator primary frequency modulation in off-grid mode, the problem that traditional secondary frequency modulation is difficult to consider regulation rapidity and suppress overshoot, the application is divided into two stages with the zero point of frequency change rate as boundary on the basis of traditional VSG secondary frequency modulation active ring integral feedback: the first stage adopts fixed large integral coefficient to suppress frequency drop quickly, the second stage dynamically adjusts integral coefficient based on power deviation and frequency deviation integral, while trigger signal and key parameter design are completed.Compared with the traditional method, the application can realize frequency no-error regulation, effectively consider fast response and overshoot suppression, significantly improve the dynamic stability and operation safety of off-grid VSG under load disturbance, suitable for frequency control scene of high proportion renewable energy grid-connected microgrid, with wide application prospect and practical significance.

The invention discloses an intelligent wind power generation method and system suitable for a subway piston air shaft, and relates to the field of parameter regulation and control. According to the intelligent wind power generation method and system, the future working condition and the target angle are dynamically predicted by collecting multi-source field data in real time, and threshold value judgment, multiple repeated prediction and a weighted smoothing filtering mechanism are combined; invalid fine adjustment and false triggering caused by instantaneous data jitter are effectively eliminated, a reasonable to-be-adjusted moment is accurately locked, a regulation and control starting opportunity is accurately calculated and pre-planned based on a time-consuming model, and advanced and accurate in-place angle adjustment is guaranteed; and finally, introducing a periodic power deviation closed-loop evaluation iteration mechanism, dynamically and adaptively optimizing a regulation and control trigger threshold value, predicting smoothing times and weight distribution core parameters, continuously correcting the adaptive deviation between initial parameters and complex and variable working conditions, and finally, calculating the optimal power deviation of the complex and variable working conditions. And the energy capturing efficiency, the operation stability and the long-term self-adaptive service performance of the system under complex reciprocating airflow disturbance are remarkably improved.

The invention discloses an intelligent extension socket and a control method thereof.The intelligent extension socket comprises a plurality of sockets, a plurality of relays and a power management control module, the sockets and the relays are connected in series in a one-to-one correspondence mode, and the control method is applied to the power management module and comprises the steps that when the intelligent extension socket supplies power to the outside, electrical parameter values of the sockets are obtained, and dynamically controlling the on-off of the plurality of relays according to the electrical parameter values and preset values so as to control the working states of the plurality of sockets. According to the technical scheme, electrical parameter detection and dynamic control are achieved through the relays and the power management module, the on-off state of each socket is controlled according to the real-time electrical parameter detection result, and long-time overcurrent and overload conditions are effectively prevented, so that tripping of power supply equipment is prevented, and the service life of the extension socket is prolonged.

The invention discloses an air cooling and cold storage combined refrigerating device which comprises a refrigerating system and a cold storage system. The refrigerating system comprises a compressor, a condenser, a liquid storage device, a first electromagnetic valve, a first expansion valve, an evaporator, a gas-liquid separator, a second electromagnetic valve, a second expansion valve and a first set of flow channels of a plate heat exchanger. The cold storage system comprises a cold storage box, a water pump and a second set of flow channels of the plate heat exchanger. Refrigeration and cold storage are combined, the air conditioner has the advantages of being easy to adjust, low in cost and high in reliability, and the PTC electric heater is adopted, so that the fan can be stopped immediately when electric heating is stopped.

A thermal power side BDS multi-storage complementary system based on machine-furnace decoupling is provided with a thermal power machine-furnace decoupling module, a thermal energy storage module and an electric energy storage module. The fire engine-boiler decoupling module meets deep peak regulation after engine-boiler decoupling and can generate large-flow high-parameter quality steam; the heat energy storage module is connected into the boiler water supply system, and the decoupled high-parameter quality steam is connected into the heat energy storage module; the electric energy storage module and the kinetic energy storage module are accessed by plant power and / or network power; the machine-furnace decoupling system is superposed with fused salt energy storage, and the electric energy storage module and the kinetic energy storage module can be combined and applied to the thermal power plant and cooperate with each other to play a unique role, so that a multi-storage complementary long-time, high-efficiency and fast-response thermal power side energy storage system is provided for thermal power, the operation efficiency and stability of the thermal power plant are jointly improved, and the thermal power plant is protected. And the rapid scheduling requirement of the response power grid can be met.

The present invention relates to the technical field of thermal power plant flue gas carbon capture and resource utilization, and discloses a thermal power plant flue gas low energy consumption phase change CO2 capture-methanol co-production process system, which comprises: a CO2 absorption unit, which enables a non-aqueous phase change absorbent to absorb CO2 in thermal power plant flue gas to form a rich absorption liquid; the liquid-liquid phase separation unit is used for spontaneously separating the rich absorption liquid into a barren liquid phase and a rich liquid phase, and returning the barren liquid phase to the CO2 absorption unit; the rich liquid regeneration unit is used for heating and regenerating the rich liquid phase so as to desorb CO2 gas; the CO2 catalytic methanol synthesis unit is used for synthesizing methanol from CO2 gas and external hydrogen-rich gas; the heat pump waste heat recovery unit is used for recovering methanol synthesis reaction heat, upgrading the methanol synthesis reaction heat and supplying the methanol synthesis reaction heat to the pregnant solution regeneration unit; and the AI intelligent regulation and control unit is used for collecting process parameters of each unit and carrying out collaborative optimization control on an execution mechanism of each unit based on an improved model prediction control algorithm. Therefore, the energy consumption in the carbon capture process is greatly reduced, and the high-value utilization of carbon resources is realized.

This utility model discloses a device and vehicle for controlling the height and posture of a vehicle cab, comprising a height valve assembly and an adjusting linkage assembly. The height valve assembly includes a swing arm, a connecting shaft assembly, a rotor valve plate, a valve core assembly, an upper valve cover, and a lower valve body; the lower valve body has an air inlet, an air outlet, and an exhaust port with a muffler; the rotor valve plate and the valve core assembly cooperate to form a metal shear seal, switching the air path according to the swing arm position, and has a dead zone. The adjusting linkage assembly includes upper and lower connecting rods that can slide relative to each other and are locked by fastening sleeves, with connecting ball heads at both ends. This utility model has the advantages of large displacement, high inflation and deflation efficiency, fast response, good anti-fouling properties, low noise, and convenient adjustment, and is especially suitable for new energy vehicles, effectively improving the smoothness and reliability of the entire vehicle.