22 results about "Derating" patented technology

The invention discloses a voltage regulation control method and system for an electric power regulator, and belongs to the technical field of voltage regulation, and the method specifically comprises the steps: collecting parameters of a power grid side and a load side, including current and voltage, building an operation model of the electric power regulator based on parameter identification, and according to the operation model and a target output voltage, calculating the voltage of the electric power regulator. The method comprises the following steps: calculating to obtain a reference voltage sequence in combination with electric energy quality and efficiency constraints, monitoring the states of a power grid and a load in real time, projecting the reference voltage sequence to a safe operation envelope when voltage fluctuation or abnormity is detected, performing hierarchical derating control, generating a regulation signal of the power regulator based on the corrected reference voltage sequence, and outputting the regulation signal of the power regulator. The operation model of the power regulator is calibrated through real-time feedback; the power quality and efficiency can be considered under the normal working condition, stable voltage control can be kept during power grid fluctuation, frequency deviation or load sudden change, and resource waste caused by single shutdown or extensive derating is avoided.

The invention provides a medium and low voltage flexible direct current interconnection scheduling method, and relates to the technical field of power distribution network scheduling, and the method comprises the steps: carrying out the feature weight correction of a first fault judgment result and a second fault judgment result according to a transient feature quantity, and obtaining the corrected fault positioning information; specific fault equipment is determined according to the corrected fault positioning information, and a fault token containing the available capacity of the specific fault equipment is generated; and obtaining a dynamic capacity boundary of the thermoelectric coupling constraint of the specific fault equipment, constructing a dynamic scheduling optimization model, and performing optimization scheduling on the specific fault equipment according to the dynamic scheduling optimization model. According to the method, the fault information is obtained through coupling backstepping and spectral decomposition, weight correction is carried out in combination with the transient characteristics in the current limiting mode, the fault token containing the available capacity is generated and participates in scheduling, unavailable equipment can be eliminated in time or participated in derating, and the power supply continuity of key loads is guaranteed.

The application provides a current conversion device and a control method thereof. The current conversion device comprises a power device and a controller connected to the power device. The controller is configured to determine a maximum junction temperature of the power device in a current grid cycle during operation of the current conversion device, wherein the maximum junction temperature is a maximum value of the junction temperature of the power device in the current grid cycle; determine a derating state of the current conversion device according to a difference between the maximum junction temperature and a limited junction temperature of the power device, wherein the derating state is used to indicate whether the current conversion device is operated in a derating mode and / or used to indicate a relationship between an actual derating and an expected derating when the current conversion device is operated in the derating mode; and determine a limited current of the current conversion device in a next grid cycle according to the derating state of the current conversion device, wherein the limited current is a limit value of an output current of the current conversion device. The energy conversion effect of the current conversion device can be significantly improved on the basis of improving the safety of the power device of the current conversion device.

A temperature measurement structure for a switching device (2), comprising a fixing support (1) provided with a through hole (121), at least one switching device (2) electrically connected to a circuit board and arranged on one side of the fixing support (1), and at least one temperature measurement device (3) electrically connected to the circuit board and arranged on the other side of the fixing support (1), wherein a sensing end of the temperature measurement device (3) extends into the through hole (1) to be in contact with the switching device (2). By providing the temperature measurement device (3) on the fixing support (1) onto which the switching device (2) is fixed, the temperature measurement device (3) is in direct contact with the switching device (2) by means of the through hole (121) of the fixing support (1), so that the temperature measurement device (3) can acquire the temperature of the switching device (2) in real time, thereby achieving low thermal resistance and rapid heat conduction, and improving the real-time performance and accuracy of temperature measurement of the switching device (2). Therefore, by accurately monitoring the temperature of the switching device (2) in real time, when the temperature of the switching device (2) becomes excessively high, measures such as power derating or over-temperature protection are taken promptly to protect the switching device (2) and an on-board power supply. Also disclosed is an on-board charger.

This invention discloses a GaN power amplifier system and control method based on envelope tracking and thermal feedback. The system includes a system control module, and an audio signal conditioning module, a programmable power supply module, a thermal feedback module, and a GaN power output module, all communicatively connected to the control module. The system control module executes dual closed-loop control logic: the first closed loop dynamically adjusts the output voltage of the programmable power supply module using envelope tracking technology, ensuring it closely follows changes in the amplitude of the audio signal, thus reducing power consumption and heat generation at the source; the second closed loop, based on real-time temperature data collected by the thermal feedback module, prioritizes dynamic compression of the low-frequency band of the audio signal or smoothly reduces the overall main volume when overheating occurs, achieving intelligent thermal derating protection without interrupting playback. This invention significantly improves the energy efficiency and reliability of the power amplifier system.

The invention provides a silicon photonic gyroscope suitable for wide-temperature-range adaptive power control and a control method thereof. The silicon photonic gyroscope comprises an optical chip, an optical fiber loop and an integrated circuit, the optical chip comprises a light source, a coupler, a first detector, a second detector, a modulator and a thermistor; the integrated circuit comprises a half-wave voltage control module, a light source intelligent temperature control module, a driving temperature control module and a signal demodulation module; a thermistor is integrated on a silicon photon chip to measure the working temperature of the chip in real time, meanwhile, the magnitude and direction of TEC current are measured in real time to sense refrigeration / thermal power, the magnitude of the current TEC current is comprehensively designed according to the power derating level, and the driving power of a light source is precisely regulated and controlled by adopting an advanced intelligent algorithm; the temperature and the power consumption are considered to achieve the optimal control strategy of the optical chip, and the gyro output real-time compensation is performed in the signal demodulation module aiming at the current temperature and the driving current, so that the gyro output error caused by the dynamic temperature adjustment and the unsteady state of the driving current is avoided.

The invention discloses an energy distributed control method and system applied to a micro-grid system, and relates to the technical field of distributed energy control, and the method comprises the following steps: collecting a voltage phase angle sequence at a key node of a micro-grid, constructing a phase angle extrusion dynamic fingerprint band based on the voltage phase angle sequence, and forming a time distribution rule of phase angle extrusion; and calculating an extrusion strength index according to the phase angle extrusion dynamic fingerprint band, mapping the extrusion strength index into a dynamic margin parameter of the reactive power compensation device, and limiting a reverse absorption trigger threshold according to the dynamic margin parameter. According to the method, distributed reactive power regulation and control are realized through phase angle extrusion dynamic characteristics, so that the micro-grid has adaptive stability under a multi-source fluctuation condition. The reactive power compensation device performs smooth output according to extrusion characteristics, eliminates reverse absorption and keeps voltage stable; the energy storage device implements self-adaptive derating by relying on a bus voltage dynamic support curve, coordinates active and reactive output, prevents voltage collapse, and improves the overall operation safety and continuity of the system.

The invention relates to the technical field of electric energy conversion, in particular to a parallel power supply system based on feedback injection and a current sharing method. The system comprises a plurality of power conversion branches, a central current sharing controller and a current detection circuit. Each branch comprises a power management unit, an active isolation circuit and a feedback regulation network. The controller collects the current and the change rate in real time, an analog compensation signal is injected into a branch voltage feedback pin through a feedback network, the output voltage is adjusted under the condition that the internal reference of the chip is not changed, and dynamic balance of the load current is achieved. When it is monitored that the current change rate of any power conversion branch exceeds an early warning threshold value, a derating signal is generated to control the power conversion branch to reduce the current proportion, and the power conversion branch is made to operate online in a derating mode. In addition, the invention also provides a current sharing method applied to the parallel power supply system. According to the invention, non-intrusive precise regulation and control are realized, the sub-health module is protected through active derating, the service life of the system is effectively prolonged, and the service continuity is ensured.

The invention discloses an over-temperature derating method and an over-temperature derating system based on power consumption calculation of a power device. The over-temperature derating method and the over-temperature derating system are applied to an optical storage inverter comprising a photovoltaic side circuit, a battery side circuit and an inverter side circuit. According to the method, the voltage and power of each side circuit port, the sampling temperature of a radiator and the environment temperature are obtained, and when the sampling temperature exceeds a preset derating temperature, a loss analysis model is established based on each side circuit topological structure to calculate the loss power; determining thermal resistance from a power device of each side circuit to a temperature sampling point according to a heat radiator thermal resistance network model, calculating real-time temperature of the power device by utilizing a superposition principle, and further calculating an influence coefficient and a power reduction coefficient of power consumption of each side circuit on the temperature to obtain a power derating coefficient of each side circuit; and finally calculating the power amplitude limiting value of each side circuit and implementing mutually independent power amplitude limiting control. According to the invention, differential derating control can be carried out according to different contribution degrees of power consumption of each circuit on temperature influence, and the over-temperature protection problem of the optical storage inverter is effectively solved.

The application discloses a kind of over-temperature derating method and system based on power device power consumption calculation, applied to the photovoltaic storage inverter including photovoltaic side circuit, battery side circuit and inverter side circuit.The method obtains the voltage and power of each side circuit port, the sampling temperature and ambient temperature of heat sink, when the sampling temperature exceeds the preset derating temperature, establishes the loss analytical model based on the topology structure of each side circuit to calculate the loss power, determines the thermal resistance from each side circuit power device to temperature sampling point according to the thermal resistance network model of heat sink, and then calculates the influence coefficient of each side circuit power consumption on temperature and the derating power coefficient, obtains the power derating coefficient of each side circuit, finally calculates the power limiting value of each side circuit and implements independent power limiting control.The application can perform differentiated derating control according to the different contribution of each circuit power consumption on temperature, effectively solve the over-temperature protection problem of photovoltaic storage inverter.

This application relates to the field of circuit breaker technology, providing an adaptive overcurrent protection method and system for explosion-proof circuit breakers. The method includes: determining the electrical equipment connected to the busbar of the explosion-proof circuit breaker; judging the load type, analyzing the dynamic characteristics of the current waveform based on the type, and constructing an overcurrent threshold mapping decision relationship; collecting current environmental data, analyzing its impact on current carrying capacity, and generating a current carrying capacity degradation index; using this index to optimize the overcurrent threshold mapping decision relationship in real time, and performing overcurrent monitoring and protection action triggering on the busbar based on the optimized mapping decision relationship. This application solves the technical problem of traditional explosion-proof circuit breakers having fixed overcurrent setting values ​​and being unable to simultaneously consider different load conditions and environmental derating, resulting in insufficient protection accuracy and adaptability. It achieves the technical effect of real-time adaptive setting of the overcurrent threshold based on load pulse characteristics and environmental current carrying capacity, improving the accuracy and adaptability of overcurrent protection for explosion-proof circuit breakers.

The invention relates to the technical field of radio frequency communication, in particular to a millimeter wave amplifier output open circuit protection circuit. A first protection unit, a second protection unit and an adjusting unit; by utilizing the original diode protection circuit, when the load voltage output by the millimeter wave amplifier is too high, the Vload voltage reduces the bias voltage, so that the gain of the millimeter wave amplifier is correspondingly reduced, the derating of the millimeter wave amplifier is realized, the millimeter wave amplifier is protected, and the derating threshold can be actually adjusted according to the set adjusting unit. And the ns-level millimeter wave amplifier protection is realized.

The disclosure relates to an electrical charger which may be denoted a first charger for a mining / construction machine The first charger (100) is connected to a power grid (200) and configured to receive a first input power (IP1) from the power grid (200) for charging at least one first battery (310). The first charger (100) is further configured to: receive a first control signal (510) from a second charger (100´) connected to the power grid (200). The first charger (100) is configured to: increase a reference power for charging the first battery (310) when the first control signal (510) is a derating signal indicating a derating of a reference power of the second charger (100´), or decrease a reference power for charging the first battery (310) when the first control signal (510) is a boosting signal indicating a boosting of a reference power of the second charger (100´). Furthermore, the disclosure also relates to a corresponding method.

The application discloses a switching device derating method, circuit and device. The derating method comprises the following steps: collecting a first index value of a switching device; calculating a second index value associated with the junction temperature of the switching device according to the first index value; judging whether the second index value meets a derating condition; and performing a derating process on the switching device meeting the derating condition. The derating method provided by the embodiment of the application can obtain the junction temperature of the switching device without using a temperature detection device, and has high precision.

This invention discloses a method, device, and storage medium for energy storage battery state estimation and hierarchical closed-loop control based on multi-source state reliability aggregation. The method collects voltage, current, temperature, and controlled object state data, preprocesses them, and inputs at least two state estimation sources, diagnostic sources, or model branches to obtain source outputs. A reliability index is determined based on at least one of residuals, innovation quantities, covariance, sensor quality, or model uncertainty. The source outputs, reliability index, and input data quality index are constructed into a target risk feature set, and the reliability index is used as an independent correction quantity in risk assessment. Based on the risk assessment results modulated by reliability, the risk level and risk cause labels or control constraint variables are determined, generating equalization, thermal management, charge / discharge derating, or protection control commands. Under low reliability conditions, the system enters a conservative control mode and corrects control parameters based on feedback.

Method for managing a derating of a thermal power transferred to a cabin of a vehicle with an electric powertrain, in case of a full exploitation of the available thermal power, without resorting to the use of a double electric heater, one for the heat transfer liquid entering a cabin heater (CAB) in a heat exchange relationship with the cabin, and one for the heat transfer liquid which enters a heating circuit of a high-voltage battery (BAT), so that it is possible to maintain the use of a single electric heater (ECH).

The invention relates to a dynamic real-time electric energy management device for industrial electric equipment. The dynamic real-time electric energy management device comprises a monitoring module, a control module, a compensation module and a communication interface, the monitoring module is used for synchronously acquiring three-phase current and line voltage and extracting harmonic and inter-harmonic characteristics; the control module is internally provided with an artificial intelligence model, predicts the amplitude, the phase and the change rate of the target harmonic wave according to the characteristics, obtains a time advance by combining with control delay estimation, and generates a compensation instruction for correction in advance; the compensation module is composed of a three-level T-type neutral-point-clamped active electric power filtering power unit capable of being expanded in parallel and a detachable passive filter, and harmonic waves, voltage fluctuation and three-phase imbalance are comprehensively compensated by adopting an active and passive cooperative compensation strategy; and the communication interface is used for uploading monitoring data, a compensation state and a model confidence coefficient, receiving a remote configuration and model updating instruction, and carrying out self-calibration, early warning and derating on online impedance identification and health assessment. Therefore, the harmonic content is remarkably reduced, fluctuation and imbalance are suppressed, the power factor and the system reliability are improved, and the power quality standard is met.

The invention relates to a derating control method and device, a photovoltaic air conditioner and a storage medium, and the derating control method comprises the steps that the first element temperature and the first element temperature change rate of a power element in a photovoltaic inverter within a first preset time period are obtained; determining a target threshold range in a plurality of reference threshold ranges according to the first element temperature and the first element temperature change rate; determining target derated power according to the target threshold range, wherein the target derated power is smaller than the rated power of the power element; and generating a first derating control signal based on the target derating power, and outputting the first derating control signal to the power element, the first derating control signal being used for indicating the power element to work according to the target derating power. According to the embodiment of the invention, the temperature of the power element can be maintained in a safe range, overheating damage is avoided, the output efficiency of the inverter can be reserved to the maximum extent, the power generation loss caused by excessive derating is prevented, and the equipment reliability and the energy utilization efficiency are both considered.

This invention relates to a power supply control method, device, controller, vehicle, medium, and product for a vehicle. In this method, the predicted output power and thermal derating probability of each DC-DC converter are calculated based on the obtained operating parameters of the DC-DC converters in each power supply branch. Furthermore, if the predicted output power of at least one DC-DC converter is less than its load power, a target power for each DC-DC converter is calculated based on its predicted output power, thermal derating probability, preset priority factor, and load power. Finally, the operation of the DC-DC converters is controlled according to their target power. This solution improves the safety of DC-DC converters by predicting when they are about to malfunction and readjusting their power.

The utility model provides a switching power supply automatic derating circuit with an over-temperature protection function, comprising a switching power supply circuit which comprises a switching power supply control module, an inductor, an output capacitor and a voltage feedback circuit, an input voltage end of the switching power supply control module is connected with a power supply, and a switching output end of the switching power supply control module is connected with an output end VOUT through the inductor; one end of the output capacitor is connected with the output end VOUT, and the other end of the output capacitor is grounded; the input end of the voltage feedback circuit is connected with the output end VOUT, and the output end of the voltage feedback circuit is connected with the feedback end of the switching power supply control module; the input end of the temperature detection circuit is connected with the output end VOUT, and the output end of the temperature detection circuit outputs bias voltage; the positive electrode of the unidirectional conduction device is connected with the output end of the temperature detection circuit, and the negative electrode is connected with the output end of the voltage feedback circuit. Compared with the prior art, the temperature of the system is detected through the thermistor, and when the temperature of the system exceeds a set threshold value, the output power of the switching power supply is reduced, so that power derating is realized.

The invention belongs to the technical field of power electronics and energy storage, and provides a string type energy storage converter and a control system thereof. The converter adopts a three-level topology, and a basic module of the converter comprises a hybrid packaging power device of SiC and IGBT and a layered cross parallel bus bar structure and is used for realizing low parasitic inductance and current sharing under 1500V direct current voltage; the AC side is provided with an active damping circuit to suppress harmonic resonance under a 690V working condition; the main control module is connected with the basic module through a high-speed optical fiber, adopts a network construction type and droop control dual-mode strategy, executes an improved sliding mode control algorithm based on WAMS signal feedforward, and compensates current phase delay under a weak power grid; the control system realizes power derating based on a three-dimensional database, intelligent air cooling, device life prediction, online power grid impedance identification and mode adaptive switching. According to the invention, the problems of high efficiency, high reliability and stable operation of the energy storage converter in a high-voltage and weak power grid environment are effectively solved.

The application discloses a control method and device of an energy storage inverter, the energy storage inverter and a storage medium. The control method of the energy storage inverter comprises the following steps: acquiring an ambient temperature, an actual temperature of the energy storage inverter, a rated power and a load power and an actual rotating speed of each cooling fan; calculating a total effective air volume according to the actual rotating speed; calculating an allowed output power through an air volume-temperature coupling derating model according to the total effective air volume, the ambient temperature, the actual temperature and the rated power; and controlling an actual output power of the energy storage inverter according to the load power of the energy storage inverter with the allowed output power as an upper limit. The control method of the energy storage inverter provided by the application is beneficial to maintaining power supply continuity when some cooling fans are attenuated or fail, realizes adaptive improvement of the allowed power in a low-temperature environment to avoid excessive derating, reasonably reduces the allowed power in a high-temperature environment to prevent insufficient cooling, and thus improves the safety and economy of the system under different environmental conditions.