14results about How to "Reduce capacity requirements" patented technology

This disclosure provides an X-ray imaging device and its power distribution unit and wireless power transmission device. The power distribution unit includes: a first rectifier circuit, a charging circuit, an energy storage module, and a first inverter circuit; the input terminals of both the first rectifier circuit and the charging circuit are connected to the external power grid; the output terminal of the first rectifier circuit is connected to the input terminal of the first inverter circuit, and the output terminal of the first inverter circuit is connected to the wireless power transmission device of the X-ray imaging device; the output terminal of the charging circuit is connected to one end of the energy storage module, and the other end of the energy storage module is connected to the input terminal of the first inverter circuit. In this disclosure, the power supply from the power grid and the power supply from the energy storage module are in parallel, which can reduce the imaging device's demand on the power grid capacity. Since the charging circuit only participates in the charging process of the energy storage module and does not participate in the discharging process of the energy storage module, it can realize simultaneous charging and discharging of the energy storage module, and there are no excessive requirements on the power level of the charging circuit, which can reduce the cost of the charging circuit.

A data quantization method and device, a computer readable storage medium and a chip, the data quantization method comprising: obtaining a data block to be quantized, dividing the data block to be quantized into one or more data groups to be quantized according to a preset grouping method; performing quantization calculation on each data group to be quantized according to a target quantization format, to obtain quantization data corresponding to data in each data group to be quantized and quantization metadata corresponding to each data group to be quantized, wherein the quantization metadata is used for dequantization of the quantization data; and storing the quantization metadata corresponding to the data block to be quantized and the quantization data as a continuous data structure.

The embodiment of the invention relates to a control method and device of photovoltaic equipment, the photovoltaic equipment and a storage medium. The method comprises the steps that the photovoltaic power generation power of the photovoltaic equipment is acquired, and the state of charge of an electric energy storage module of the photovoltaic equipment is acquired; determining a current phase change energy storage mode of a phase change energy storage module of the photovoltaic equipment according to the photovoltaic power generation power; and controlling the phase change energy storage module according to the phase change energy storage mode, and controlling the electric energy storage module according to the charge state. By adopting a double-energy-storage framework combining electric energy storage and thermal energy storage, different modules of the photovoltaic equipment can be controlled according to photovoltaic power generation power and the state of charge of a battery, so that an energy supply mode is adjusted, an air conditioner in the photovoltaic equipment is enabled to operate stably, the battery capacity demand is effectively reduced, the system cost is reduced, and the energy utilization rate is optimized.

The invention provides an auxiliary converter equipment control method and device in an offshore wind power DC system, and the method comprises the steps: carrying out the proportional-integral control of an offshore AC voltage frequency deviation through a frequency control module, generating a DC voltage reference value, assigning the DC voltage reference value to a DC internal potential of auxiliary converter equipment, and achieving the indirect control of frequency; meanwhile, a d / q-axis controller is used for controlling capacitor voltage and PCC point voltage deviation, a d / q-axis current reference value is generated, a harmonic suppression module is combined to compensate harmonic current, and finally a voltage reference value calculation module is used for generating a three-phase bridge arm voltage reference value by using a proportional resonance controller and a linear transformation matrix; and active / reactive decoupling control and frequency stability control are realized. The invention also provides a corresponding control device, electronic equipment, a storage medium and a program product, and can be applied to an open sea high-capacity wind power delivery system, so that the system oscillation risk is effectively reduced, the capacity demand of auxiliary commutation equipment is reduced, and the system stability and the electric energy quality are improved.

The invention discloses a heliostat wireless control system and method based on multiple frequency bands. The system comprises an in-situ layer, a convergence layer and an application layer. The in-place layer is a heliostat in-place control layer and comprises a communication gateway, an in-place controller and corollary equipment of the in-place controller; the in-situ layer is based on a cable-free design, and the communication gateway and the in-situ controller are in communication connection through a wireless network; the convergence layer comprises a control center, a switch and a wireless management platform; the control center manages the communication gateway, distributes frequency bands for the communication gateway, and accesses the mirror field optical fiber ring network through the switch to communicate with the mirror field control system; the application layer comprises a mirror field operator station, an engineer station and a mirror field control and scheduling system, and is used for data collection, display and scheduling of the whole mirror field control system. According to the invention, the cost of the mirror field in the aspects of power distribution equipment, cable purchase and construction is obviously reduced.

This invention discloses a distributed transmit / receive power joint optimization method and system for a simultaneous information and energy transmission cooperative system. The method comprises the following steps: Step 1, constructing distributed performance indicators to characterize information rate and collected energy; Step 2, each access point independently performs joint allocation of transmit power and receive power splitting factors; Step 3, users calculate the power splitting factor based on their own rate requirements, energy requirements, and battery capacity limitations. This invention solves the problem of high fronthaul link interaction in existing centralized power allocation schemes in simultaneous information and energy transmission cooperative systems.

This invention provides a hybrid solid-state transformer and its power distribution method for normal power optimization, belonging to the field of power electronic transformer technology. It includes a power frequency transformer, a three-stage dual-parallel converter, a power sampling circuit, a hysteresis comparator circuit, and a combined controller. One end of the power frequency transformer is connected to the high-voltage grid, and the other end is connected to the AC load. The three-stage dual-parallel converter is connected in parallel with the power frequency transformer. The power sampling circuit acquires the voltage and current of the AC load and outputs an analog voltage signal. The hysteresis comparator circuit evaluates the operating conditions of the analog voltage signal and outputs a binary status signal. The combined controller acquires the binary status signal and the fault signal of the three-stage dual-parallel converter, and controls the operating state of the power frequency transformer and the three-stage dual-parallel converter. This invention solves the problems of low operating efficiency and uneven power distribution of existing transformers under light load, heavy load, and fault conditions.

The invention belongs to the technical field of power semiconductor testing, and provides a multi-pulse testing circuit and method for testing multiple power semiconductors simultaneously, and the circuit comprises a DC adjustable power supply, a charging switch, an anti-reverse diode, a DC capacitor, an inductor, and an energy storage battery. The anode of the direct-current capacitor is connected with the cathode of the anti-reverse diode, and the cathode of the direct-current capacitor is connected with the cathode of the direct-current adjustable power supply; wherein a first measuring point is arranged between the positive electrode of the direct-current capacitor and the inductor and is used for connecting a first to-be-measured device; and a second measuring point is arranged between the connecting point of the first measuring point and the inductor and the cathode of the energy storage battery and is used for connecting a second device to be measured. According to the test circuit disclosed by the invention, the device to be tested can be tested under the working condition as same as that of an actual working circuit, the loss is small, the control method is simple, the batch reliability test of the semiconductor device can be completed, and the packaging reliability and dynamic characteristics of the semiconductor device are effectively evaluated.

The utility model discloses a compensation capacitance box for error testing of a current transformer. The compensation capacitance box comprises a power factor unit, a combined capacitor unit and a resonance suppression unit, the power factor unit is arranged between the input ends or the output ends, the combined capacitor unit is arranged between the input ends or the output ends, the combined capacitor unit is located on one side of the power factor unit, and the resonance suppression unit is connected in a circuit of the combined capacitor unit in series; according to the utility model, the power factor unit and the combined capacitor unit are adopted, a real-time power supply power factor is monitored through the power factor unit, and the combined capacitor unit is used for connection or disconnection; a resonance suppression unit is further arranged, the circuit impedance is optimized by the resonance suppression unit, and the influence of harmonic waves on the circuit is reduced; the adjustable capacitor driven by the servo motor and the parallel RC damping loop work cooperatively, and the compensation capacitance and the circuit impedance are adjusted dynamically.

This invention relates to the field of power distribution, and in particular to a magnetically controlled transformer device for flexible interconnected power distribution networks. The device includes a first transformer, a second transformer, a magnetically controlled circuit, and a start-stop circuit. By connecting the secondary windings of the first and second transformers in series, and connecting the input of the magnetically controlled circuit to the secondary winding of the first transformer and the output to the primary winding of the second transformer, the magnetically controlled circuit only needs to provide a small adjustment voltage to regulate the amplitude and phase of the entire device's output voltage through the transformer coupling effect. This achieves bidirectional flexible scheduling of active and reactive power. Furthermore, since the main power path is primarily carried by the transformer windings, the magnetically controlled circuit only handles power regulation, significantly reducing the capacity requirements of full-power power electronic devices, thus reducing cost and size. Simultaneously, the magnetically controlled circuit is constructed using multiple sub-modules connected in parallel, each of which can be independently sampled, supporting online disconnection of faulty sub-modules, thereby improving system reliability and maintainability.

This invention provides a cascaded controlled current source system based on supercapacitor energy storage, relating to the field of current source technology. The system includes: a three-phase NPC three-level rectifier module; a BUCK buck converter; a dual-tube parallel H-bridge inverter module; a current sampling unit located on the secondary side of the current-boosting transformer for real-time acquisition of the current flowing through the fuse under test; and an inverter-side proportional resonant controller. The input terminal of the inverter-side proportional resonant controller is connected to the output terminal of the current sampling unit to receive the error between the feedback current and the reference current command. The output terminal is connected to the drive terminal of the dual-tube parallel H-bridge inverter module. The proportional resonant controller has infinite gain at the fundamental frequency to ensure that the output current tracks the reference command without steady-state error. This invention can reduce grid capacity requirements while achieving a high-precision constant current control for a large current source.

The application provides a power distribution transformer noise testing device and method, comprising a first capacitor group, one end of which is connected with a voltage divider, and the other end of which is connected with a power supply; a second capacitor group, one end of which is connected with a first end of the power distribution transformer to be tested, and the other end of which is connected with a current transformer; the other end of the power supply is connected with the voltage divider, and the two ends of the voltage divider are respectively connected with a second end and a third end of the power distribution transformer to be tested; and the other end of the current transformer is connected with a fourth end of the power distribution transformer. The application adopts the capacitor group to compensate the inductance of the primary and secondary sides, improves the power factor of the experimental circuit, realizes the noise testing of the power distribution transformer under the rated working condition (voltage and current), and reduces the requirement of the experimental circuit on the power supply capacity.

This invention discloses a distributed series reactor device and control method for power lines, belonging to the field of power systems. The distributed series reactor device includes: introducing distributed adjustable series reactors into the power line between the starting bus and the ending transformer; a distributed series reactor control module acquiring the three-phase current signal of the power line, the three-phase voltage signal of the distributed fine-tuning series reactor, and the DC bus voltage signal of the distributed fine-tuning series reactor, generating fine-tuning control signals and coarse-tuning control signals; controlling the number of distributed coarse-tuning series reactors connected through the coarse-tuning control signal, and then connecting them to a preset reactance value through the fine-tuning control signal; continuously adjusting the reactance parameters of the power line between the starting bus and the ending transformer. This invention continuously changes the equivalent reactance of the power line through distributed adjustable series reactors, achieving three-phase imbalance management and power flow distribution adjustment, reducing system costs and losses, and improving operational reliability.

The utility model discloses a kind of power supply device and electric two-wheeled vehicle, applied to power supply technical field, to solve the problem that power supply device in prior art cannot continuously power when battery fails, specifically includes power path switching module works at first on or second on state;Wherein, first on state is the connection of main battery module and external low-voltage load and external high-voltage load, second on state is the connection of spare battery module and external low-voltage load;Voltage acquisition module collects the output voltage of main battery module;When the output voltage of main battery module is lower than preset threshold, control module controls power path switching module to switch from first on state to second on state.In this way, voltage acquisition module and control module constitute closed-loop monitoring system, ensure to complete seamless switching in main battery failure moment, avoid the electronic system paralysis of whole vehicle, realize accurate power protection under emergency scene.