16 results about "Oscillatory power" patented technology

The invention provides a 40Hz acousto-optic stimulation dynamic optimization system based on electroencephalogram closed loop feedback, belongs to the technical field of cognitive disorder treatment, and solves the technical problems that an existing stimulation system lacks a dynamic closed loop, ignores individual differences, lacks a cross-band coupling mechanism and the like. Comprising an electroencephalogram gamma oscillation power detection module, an embedded signal processing and analysis module, a stimulation parameter generation and execution adjustment module, a personalized strategy database module, a multiple safety protection module, an edge calculation and communication module, a user interaction module, a head-mounted acquisition and stimulation device, a scene adaptation engine module and a double-loop closed-loop feedback control module. And the processing algorithm module comprises user terminal equipment with application software and a cloud central processing unit. According to real-time electroencephalogram feedback, a personalized historical data strategy library and an algorithm, parameters of 40Hz acousto-optic stimulation can be dynamically adjusted by relying on a double-loop closed-loop feedback control mechanism, and a mature cloud-edge-end cooperative computing ecosystem is constructed.

In some implementations, an optical device (e.g., a monolithic master oscillator power amplifier (MOPA) diode) may include a first facet, one or more gratings, an amplifier structure terminated with a second facet, and an oscillator array that includes multiple singlemode oscillators coupled to the first facet and to the one or more gratings. In some implementations, the multiple singlemode oscillators may be configured to generate multiple seed beams and to transmit the multiple seed beams into the amplifier structure through the one or more gratings.

The invention relates to the technical field of new energy station control, in particular to a new energy station cluster broadband oscillation monitoring control method and device. The method comprises the following steps: synchronizing a clock signal in a new energy station cluster based on a satellite synchronous clock signal; a master-slave distributed architecture is constructed for each station, and each slave processes the acquired sampling data to acquire the oscillation power and frequency of the corresponding branch and sends the processed and acquired data to the corresponding host; processing the acquired data by each host, and judging whether the broadband oscillation power component of each slave reaches a corresponding preset threshold value or not; if so, measuring the impedance of a branch corresponding to the target slave under the broadband oscillation frequency in real time, and calculating the total impedance of a corresponding target system; and based on the total impedance of the target system, performing stable control on the corresponding branch through a hierarchical generator tripping control strategy. According to the invention, wide-area synchronous sampling is realized by relying on a Beidou satellite synchronous clock, and suppression of broadband oscillation of the new energy station cluster is realized by grading with the minimum removal amount.

This invention relates to the field of new energy power plant control technology, specifically a method and device for monitoring and controlling broadband oscillations in a new energy power plant cluster. The method includes: synchronizing the clock signal in the new energy power plant cluster based on a satellite synchronous clock signal; constructing a master-slave distributed architecture for each station, where each slave processes the acquired sampling data to obtain the oscillation power and frequency of the corresponding branch, and sends the processed data to the corresponding master; each master processes the acquired data to determine whether the broadband oscillation power component of each slave reaches the corresponding preset threshold; if so, it measures the impedance of the corresponding branch of the target slave at the broadband oscillation frequency in real time and calculates the corresponding total impedance of the target system; based on the total impedance of the target system, it performs stable control of the corresponding branch through a hierarchical switching control strategy. This invention relies on the BeiDou satellite synchronous clock to achieve wide-area synchronous sampling and uses a hierarchical approach with minimal cut-off to suppress broadband oscillations in the new energy power plant cluster.

The invention relates to the technical field of wind power grid-connected control, in particular to an inter-harmonic oscillation energy analysis method, device and equipment for a direct-drive wind power grid-connected system and a medium, and the method comprises the steps: obtaining voltage data and current data at an equipment port in the direct-drive wind power grid-connected system; extracting power frequency voltage and oscillation voltage from the voltage data, extracting power frequency current and oscillation current from the current data, calculating power frequency power according to the power frequency voltage and the power frequency current, and calculating oscillation power according to the oscillation voltage and the oscillation current; and calculating interaction energy between a grid-connected inverter and a power grid in the direct-driven wind power grid-connected system according to the power frequency power and the oscillation power, and analyzing harmonic oscillation energy of the direct-driven wind power grid-connected system according to the interaction energy. The problems that inter-harmonic oscillation energy analysis of the direct-driven wind power grid-connected system is not accurate and a multi-time scale coupling oscillation scene is difficult to deal with in the prior art are solved.

The invention discloses an external power grid-containing line oscillation power calculation method based on amplitude-frequency modulation decomposition. The method comprises the following steps: constructing a simplified wind power parallel impedance line grid-connected system model; establishing a standard form of an amplitude-frequency modulation signal; preliminarily calculating oscillation power response based on a simplified wind power parallel impedance line grid-connected system model; decomposing the oscillation power response into a power response under amplitude modulation and a power response under frequency modulation; and projecting the power response under amplitude and frequency modulation excitation to an XY coordinate system by using a phasor method to obtain a final oscillation power amplitude expression. According to the method, the power oscillation response on the external power grid voltage source circuit of the wind power grid-connected system can be accurately obtained, meanwhile, the calculation method is simple and easy to use, and power flow analysis of subsynchronous oscillation can be researched easily.

The invention discloses a laser radar system for synchronously measuring the concentration of C12 and C13 carbon dioxide columns in the atmosphere. The laser radar system comprises a laser emission module, an echo receiving module and a data acquisition and processing module. The laser transmitting module adopts a main oscillation power amplification technology and is integrated with three 2051nm seed lasers, the wavelengths of the seed lasers are respectively locked at a C12 absorption peak, a C13 absorption peak and absorption valleys of the C12 absorption peak and the C13 absorption peak, and high-energy detection pulses are generated by using time division multiplexing and two-stage amplification. The echo receiving module collects back scattering signals through a telescope, and the back scattering signals are received by a detector after being filtered. The system monitors emission energy through an integrating sphere, a data acquisition module synchronously acquires emission and echo signals of each wavelength, and respective column concentrations of two isotopes are obtained through inversion according to a differential absorption algorithm. According to the invention, active, synchronous and high-precision column concentration remote sensing measurement of C12 and C13 carbon dioxide is realized, excellent daytime detection capability of the system is ensured, and real all-day continuous observation is realized.

The application discloses an integrated amplifier circuit, which comprises an input signal conditioning module, a front-stage signal amplification module, an intermediate signal amplification module and a power output module connected in sequence. The input conditioning module is isolated from direct current through double-coupling capacitors, and impedance matching and current-voltage conversion are completed through resistors, so that direct current interference and input waveform distortion are eliminated. The front stage adopts a double-NPN triode amplification structure matched with a diode voltage-stabilized bias to realize primary amplification of weak pulse signals. The intermediate stage completes secondary signal amplification through combined triodes and relies on a compensation capacitor to suppress self-oscillation. The power output module adopts a double-NPN triode push-pull structure to improve signal driving capacity and simultaneously has overload protection and direct current isolation output functions. The circuit has the advantages of simple structure, strong anti-interference performance, excellent amplification precision and driving performance, and can effectively improve the problems of distortion and easy self-excitation of traditional circuits, and is suitable for weak pulse signal amplification scenes.

This application discloses a pump power supply switching method, a master oscillator power amplifier, a storage medium, and a product, relating to the field of fiber laser technology. The method involves acquiring the load current of a seed pump source; comparing the load current with a preset switching threshold to obtain the power supply status of a first power supply; and switching a second power supply to power the seed pump source when the power supply status is abnormal. The abnormal status is determined when the load current is below the preset switching threshold. By real-time monitoring of the seed pump source's load current and automatic switching to the backup power supply, the method achieves switching to the second power supply in case of a first power supply failure, quickly ensuring continuous power supply to the seed pump source and avoiding damage to the optical module due to seed light interruption, significantly improving the reliability and safety of the power supply.

The application belongs to the field of power system automation, and discloses a new energy sending area wide frequency oscillation coordination control method, device and system. The method comprises the following steps: deploying a control master station at a hub substation in a new energy sending area, and deploying a control substation at a new energy collection station; selecting an emergency control measure set according to the oscillation mode power of the outgoing line of each control substation; selecting a new energy grid-connected line with the largest oscillation power amplitude value ratio in the selected set; performing control in turns, and adjusting the control range according to the control effect. The application can realize accurate positioning and rapid coordination control of the oscillation source in the new energy sending area, avoid disordered action of protection devices of each station to cut off units after oscillation occurs, and ensure the safe and stable operation of the power grid.

The invention discloses a line oscillation power superposition calculation method based on a phasor method. The method comprises the following steps: constructing a simplified wind power grid-connected system model; based on a simplified wind power grid-connected system model, preliminarily deducing oscillation active and reactive power response under amplitude-frequency modulation common excitation; under independent excitation of amplitude modulation, deducing oscillation active and reactive power response; under independent excitation of frequency modulation, deducing oscillation active and reactive power response; based on a phasor method, power responses under amplitude and frequency modulation excitation are superposed, and a final instantaneous oscillation power expression is obtained. According to the method, the power oscillation response on the line of the wind power grid-connected system can be accurately given, meanwhile, the calculation method is simple and easy to use, the obtained expression is simple in form, and the method is suitable for power oscillation research of the current wind power grid-connected system.

The invention discloses a power control method and device suitable for conventional direct current networking transformation, which are applied to the technical field of power control, and the method comprises the steps: obtaining output current data and direct current side voltage data, and obtaining grid-connected voltage data and grid-connected phase angle data; extracting a frequency oscillation component from the instantaneous power data; performing adaptive frequency tracking processing on the frequency oscillation component by using a fast Fourier analysis technology to obtain dominant oscillation frequency data; inputting the direct current side voltage data into a cross coupling damping matrix for processing to obtain gain compensation data; acquiring impedance data of the target power grid in real time, and generating an anti-oscillation power signal based on the gain compensation data and the impedance data; and performing power control on the target power grid by using the anti-oscillation power signal. According to the method provided by the invention, the problem of broadband oscillation generated in the process of replacing the reactive power compensation equipment of the direct current application with the network construction type SVG can be solved, so that the safe operation of the power grid is ensured.

VSG Frequency Control Method, Device and Storage Medium based on Power Correction, belonging to the field of power electronics technology, which addresses the problem of suppressing VSG output power oscillations. The technical solution of the present application corrects the output power Pe(s) and feeds the corrected value back to the control loop to suppress power oscillations. The transfer function of the power correction stage G(s) is flexible and can be configured with appropriate parameters according to the system's inherent phase margin. Additionally, principles for selecting the parameters of the correction coefficients τ1 and τ2 are also provided. The adjustment coefficients of the power correction stage, the values of τ1 and τ2 do not affect the effect of the steady-state gain during the transient process. The present application can not only suppress VSG output power oscillations, but also provide a larger inertial support, thereby improving the stability of the VSG system.

The invention is suitable for the technical field of power systems and automation thereof, and provides a sub-hyper-synchronous oscillation suppression method, terminal equipment and a storage medium, and the method comprises the steps: collecting a first electrical signal of a first access line connected to a power grid; performing feature analysis on the first electrical signal to obtain a plurality of first oscillation power components; wherein each first oscillation power component is used for representing a power attribute corresponding to one frequency; performing feature analysis on the plurality of first oscillation power components to obtain a first risk index corresponding to the first access line; and controlling the first access line according to the first risk index so as to suppress the sub-hyper-synchronous oscillation generated by the first access line. The method effectively enhances the suppression effect of the sub-hyper-synchronous oscillation, and ensures the safe and stable operation of the power grid and the unit.

The present disclosure suppresses oscillations in a power amplifier. The power amplifier includes a balanced amplifier and a control amplifier. The balanced amplifier includes a first amplifier and a second amplifier, and amplifies input power. The control amplifier forms a load modulation balanced amplifier together with the balanced amplifier, and outputs a control signal including a fundamental component or a higher harmonic component of the input power to the first amplifier and the second amplifier, respectively. The control amplifier is disposed between the first amplifier and the second amplifier.

The present application relates to systems and methods for regulating power output of a plurality of solar cell sub-strings. One variation of a system for regulating power output of a plurality of solar cell sub-strings includes a set of solar cell sub-strings and a power regulator. The power regulator includes a power supply, a summer, a modulating signal generator, a demodulator, and an integrator. The power supply is configured to receive an input voltage from the set of solar cell sub-strings. The summer is configured to modify a voltage gain of the input voltage at the power supply. The modulating signal generator is coupled to the summer and configured to generate an oscillating power signal at the power supply. The demodulator is configured to demodulate the oscillating power signal output from the power supply. The integrator is coupled to the demodulator and the summer; and configured to define a voltage gain step at the power supply based on a DC signal component output from the demodulator.