76 results about "Power conditioner" patented technology

To provide a redox flow battery system capable of improving the efficiency thereof.SOLUTION: A redox flow battery system includes a charging section 2, a discharging section 3 and a storage section 4 storing an electrolyte. The charging section includes at least one charging cell stack and a charging side power conditioner. The discharging section includes: at least one discharging cell stack where at least two discharging cells of a plurality of discharging cells are electrically connected in series; and a discharging side power conditioner electrically connected to the at least one discharging cell stack. The charging side power conditioner has such characteristics that a conversion efficiency of the charging side power conditioner increases as a charging voltage increases, within an acceptable voltage range of the charging side power conditioner, and the discharging side power conditioner has such characteristics that a conversion efficiency of the discharging side power conditioner increases as a discharging voltage decreases, within an acceptable voltage range of the discharging side power conditioner.SELECTED DRAWING: Figure 1

In some examples, a self-starting bandgap circuit is provided. It may include one or more chopping circuits to reduce pre-trim inaccuracies. It may also, or alternatively, include an adaptive bandgap supply regulator and / or a start-up comparator to speed up the bandgap circuit's ability to come up with an adequate bandgap reference voltage.

This product is a power regulator for industrial equipment that connects power cables to power lines in factories, etc., to provide efficient current supply and change the quality of noise that causes malfunctions, thereby reducing the frequency of malfunctions.

A power regulation unit is provided for regulating power to or from a power tool battery pack. The power regulation unit includes power regulation circuitry and a controller. The power regulation circuitry is configured to regulate a received power. The controller is connected to the power regulation circuitry. The controller is configured to receive input power from one or more battery cells, regulate the input power by performing at least one of a voltage regulation and a current regulation, and output a regulated output power. For voltage regulation, the regulated output power includes a constant voltage regardless of an operating current of the power tool. For current regulation, the regulated output power includes a constant voltage up to a predetermined current threshold.

This invention relates to the field of single-phase power regulation technology, and more particularly to a multifunctional single-phase power regulator, comprising: a main circuit module for connecting the power supply and load and setting power regulation devices in series; an internal power supply and voltage regulation module that draws power from the main circuit and performs current limiting, rectification, and voltage regulation; a control and regulation module that generates control signals based on input signals and main circuit parameters under its power supply; a trigger suppression and synchronous start module that prohibits triggering before the power supply is stable or synchronization conditions are met; a protection monitoring module for monitoring main circuit parameters and prohibiting triggering in case of abnormalities; and a heat dissipation and maintenance module with an independent disassembly and assembly structure. In this invention, by drawing power from the main circuit and uniformly supplying power to the control and trigger modules for coordinated operation, control conditions are synchronously established when the main circuit is turned on, thereby improving the problem of false triggering and inconsistent start-up that easily occurs in traditional single-phase power regulators due to asynchronous power supply between the main control and the main circuit.

In some embodiments, a system comprises: a differential multi-level converter with a differential input for receiving two different voltages; a plurality of switches coupled between the input terminals; and a capacitor having a first terminal coupled to the first terminal of the first of the plurality of switches, and a second terminal coupled to the first terminal of the second, other of the plurality of switches; and an output terminal coupled to the first terminal of the third, other of the plurality of switches. The differential multi-level converter can be part of a hybrid power supply generator / modulator.The system may further include a controller configured to control selected switches from the plurality of switches so that they switch between a plurality of switching states at times, each switching state producing an output voltage corresponding to one of three discrete voltage levels.

To provide a power conditioner system including a charge / discharge stand of a vehicle, capable of stabilizing voltage of a DC link and appropriately executing power transfer between the vehicle and a storage battery.SOLUTION: A method includes a step of selecting a battery unit that executes charging / discharging operation for controlling voltage of a DC link 21, a step of charging all battery units 10 and a vehicle battery unit 71 when PV≥PL+PB+PC, and a step of discharging all the battery units 10 and the vehicle battery unit 71 when PV≤PL+PB+PC and PL≥PV.SELECTED DRAWING: Figure 3

The present disclosure provides methods and apparatus for use with energy management systems. For example, an energy management system comprises a gateway and distributed energy resources coupled to a corresponding plurality of power conditioners and a distributed energy resource controller in operative communication with the plurality of power conditioners via power line communication, wherein the distributed energy resource controller is configured to generate a unique preamble for each power conditioner of the plurality of power conditioners and transmit the unique preamble to each power conditioner of the plurality of power conditioners to communicate with each power conditioner of the plurality of power conditioners via power line communication.

[Problem] To compensate power pulsation generated in a DC link unit with a device provided in the DC link unit when a system interconnection inverter connected to the DC link unit and interconnected with a three-phase system power supply outputs three-phase unbalanced power. [Solution] A control device controls one or a plurality of devices that transmits first DC power to a DC link unit or receive the first DC power from the DC link unit. The first DC power includes first power pulsation, which is an AC component. The DC link unit is configured to be capable of transmitting and receiving second DC power to and from a system interconnection inverter that is connected to the DC link unit and interconnects with a three-phase system power supply. The control device includes a pulsation detection unit that detects a second power pulsation, which is an AC component included in a second DC power, and adjusts the first power pulsation according to the second power pulsation detected by the pulsation detection unit.

To provide a technology for integrally operating a plurality of distributed power supply systems in conjunction with each other.SOLUTION: A distributed power supply system that is interconnected with a commercial power system and supplies power to a load, the distributed power supply system comprising: a first power supply system including a first storage battery and a first power conditioner; a second power supply system including a second storage battery and a second power conditioner; and an operation control for performing at least one of first operation control for charging and discharging the first storage battery and the second storage battery in accordance with a preset priority order or second operation control for transferring power between the first storage battery and the second storage battery; And a controller configured to instruct the first power conditioner and the second power conditioner to perform operation control.SELECTED DRAWING: Figure 1

A system for operating an LC-VCO includes: a low power, low phase noise inductance capacitance voltage controlled oscillator (LC-VCO); an LC-VCO power supply regulator configured to regulate a power supply voltage to the LC-VCO; and a feedback network connected to the LC-VCO power supply regulator. The feedback network is configured to track a process voltage temperature (PVT) variation of a metal oxide semiconductor field effect transistor (MOSFET) used in a negative transconductance circuit of the LC-VCO, and adjust a loop gain of the LC-VCO over the PVT variation. The feedback network includes: a first MOSFET, where the first MOSFET is configured to function as a switch; a first resistor connected to both ends of the first MOSFET; a current source device biased with a bandgap voltage; the diode and current mirror pair comprises a second MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) and a third MOSFET; and a constant current source connected to the current source device and the diode and current mirror pair.

This approach allows for suppression of inrush current while minimizing the increase in the size of the power converter, compared to a system where the power converter is equipped with a function to prevent inrush current. [Solution] The power system 1 includes a grid-connected inverter 12 capable of mutually converting AC power from an AC power source 30 and DC power from a DC bus line 51, a power conditioner 10 equipped with a smoothing capacitor 13 connected to the DC bus line 51, a rectifier 64 that converts AC power to DC power, a surge protection circuit 61 provided between the DC bus line 51 and the rectifier 64, or between the rectifier 64 and the AC power source 30, and a hybrid device 60 that can operate by receiving DC power from the DC bus line 51 or DC power from the rectifier 64. When the voltage across the smoothing capacitor 13 is less than a predetermined value, the smoothing capacitor 13 is charged via the surge protection circuit, and then the hybrid device 60 is made to operate.

An energy storage system is provided, comprising: a DC bus; a plurality of batteries connected to the DC bus and connected in parallel; a plurality of diagnostic units, each of which is provided for each of the plurality of batteries and measures the aging state of a battery contained in the plurality of batteries by causing the battery to be discharged at a constant current or power; and a power conditioner connected to the DC bus and performing a conversion between DC and AC, wherein at least a portion of the power discharged from a battery under test among the plurality of batteries, the aging state of which is measured by the diagnostic unit, is charged into another at least one battery among the plurality of batteries or supplied to the power conditioner.

The invention relates to the technical field of electrified railway traction power supply systems, in particular to a railway power regulator integrated with cooperative energy routing, which adopts a double-direct-current bus framework, and the overall topology is divided into three core layers, namely a power routing layer, an isolation conversion layer and a source storage interface layer; a control method of a railway power regulator integrated with cooperative energy routing comprises the following steps: operation state sensing: based on a distributed data acquisition architecture, acquiring parameters at a frequency of 10kHz, preprocessing acquired data, and constructing a real-time state matrix; energy flow priority self-adaptive decision making: based on the real-time state matrix, performing intelligent switching among three operation modes by adopting a decision making mechanism combining hierarchical threshold judgment and multi-objective optimization; and dynamic coordination control and smooth switching: according to the operation mode determined by the decision, calling a corresponding core control algorithm to execute control, and realizing seamless switching between modes through a weighted smoothing strategy based on a Sigmoid function to suppress voltage impact and power abrupt change.

To provide a hydrogen production system capable of preventing non-green hydrogen from being mixed with green hydrogen in a tank while avoiding the stop of an electrolytic cell even when generated power is insufficient and a storage battery is not charged.SOLUTION: The hydrogen production system includes a power conditioner configured to convert DC power generated by a solar panel into AC power, a storage battery device, a hydrogen production device including a rectifier configured to rectify the AC power to obtain DC power and an electrolyzer configured to generate hydrogen by electrolysis using the DC power from the rectifier, a green hydrogen tank, a non-green hydrogen tank, and a control device. The control device is configured to, when a total of supply power from the power conditioner and the storage battery device to the rectifier is smaller than first reference power that can avoid deterioration of the electrolytic cell, further supply system power to the rectifier to control the supply power to the rectifier to the first reference power, and store hydrogen generated in the electrolytic cell in the non-green hydrogen tank.SELECTED DRAWING: Figure 1

In some embodiments, a hybrid generator / modulator comprises: a regulation stage having a single input and at least two outputs, the regulation stage configured to receive an input voltage at the single input and to provide two intermediate voltages at respective ones of the at least two outputs; and a multilevel converter configured to receive the two intermediate voltages and provide an output voltage having a voltage level corresponding to a voltage level of one of the two intermediate voltages or at least one other voltage level synthesized from the two intermediate voltages.

[Problem] To adjust power pulsation caused to a DC link unit due to fluctuations in power consumption of electrical equipment connected to the DC link unit. [Solution] This control device controls one or more converters for transmitting first DC power to a DC link unit. The first DC power includes a first power pulsation, which is an AC component. The DC link unit is configured to be capable of transmitting second DC power to electrical equipment connected to the DC link unit. The control device comprises a pulsation acquisition unit for acquiring a second power pulsation, which is an AC component included in the second DC power, and adjusts the first power pulsation in accordance with the second power pulsation acquired by the pulsation acquisition unit.

A field device for an industrial process includes field device circuitry, an APL communication circuit, and a power circuit. The power circuit includes a power regulator configured to regulate DC power that powers the field device circuitry and the APL communication circuit, a main power sensor configured to generate a main power signal that corresponds to the DC power, a voltage shunt regulator configured to divert excess power to a circuit common, and an excess power sensor configured to generate an excess power signal that corresponds to a magnitude of the excess power. The power regulator adjusts the DC power based on the main power signal and the excess power signal.

When a grid-connected inverter, which is connected to the DC link section and interconnected with a three-phase grid power supply, outputs three-phase unbalanced power, the power pulsation that occurs in the DC link section is compensated for by equipment installed in the DC link section. [Solution] The control device controls one or more devices that transmit first DC power to or receive first DC power from the DC link section. The first DC power includes a first power pulsation which is an AC component. The DC link section is configured to transmit and receive second DC power between the DC link section and a grid-connected inverter connected to the DC link section and a three-phase grid power supply. The control device includes a pulsation detection unit that detects a second power pulsation which is an AC component included in the second DC power, and adjusts the first power pulsation according to the second power pulsation detected by the pulsation detection unit.

The power pulsation of the DC link section caused by fluctuations in the power consumption of electrical equipment connected to the DC link section is adjusted. [Solution] The control device is a control device that controls one or more converters that transmit first DC power to a DC link unit, where the first DC power includes a first power pulsation that is an AC component, and the DC link unit is configured to be able to transmit second DC power to an electrical device connected to the DC link unit, and the control device has a pulsation acquisition unit that acquires second power pulsation that is an AC component included in the second DC power, and adjusts the first power pulsation according to the second power pulsation acquired by the pulsation acquisition unit.

To provide a power system which issues an alarm only when the alarm is really necessary.SOLUTION: A power system 10 comprises a plurality of loads 291 to 294 interconnected with a power system, a current sensor CT provided at an interconnection point, a battery 22, a storage battery power conditioner 21, and a main control device 30. The storage battery power conditioner 21 converts AC power supplied from the power system into DC power to charge the battery 22 and converts DC power discharged from the battery 22 into AC power to supply it to the plurality of loads 291 to 294. The main control device 30 supplies power from the battery 22 to the plurality of loads 291 to 294 by discharge through the storage battery power conditioner 21 when it is determined that a purchased power amount in a predetermined period exceeds an alert activation threshold. The main control device 30 further activates an alert to a communication terminal 90 when it is determined that the purchased power amount in the predetermined period which decreases by the discharge still exceeds the alert activation threshold.SELECTED DRAWING: Figure 1

The controller calculates a normal-phase current of the dq-axis, a reverse-phase current of the dq-axis, a normal-phase imaginary impedance, and a reverse-phase imaginary impedance on the basis of an output current or an output voltage on the AC side of the inverter. In addition, the controller calculates a first positive phase voltage of the three phases on the basis of the positive phase current and the positive phase imaginary impedance of the dq axis, and calculates a first reverse phase voltage of the three phases on the basis of the reverse phase current and the reverse phase imaginary impedance of the dq axis. Furthermore, the controller calculates a second positive phase voltage of the three phases as a first positive phase voltage of the three phases when the positive phase current is equal to or greater than a first threshold value, and calculates the second positive phase voltage of the three phases as zero when the positive phase current is less than the first threshold value. When the inverting current is equal to or greater than a second threshold value, the second inverting voltage of the three phases is calculated as the first inverting voltage of the three phases, and when the inverting current is less than the second threshold value, the second inverting voltage of the three phases is calculated as zero. Furthermore, the controller controls the inverter on the basis of a voltage command value obtained by subtracting the second three-phase positive-phase voltage and the second three-phase negative-phase voltage from a three-phase voltage command generated on the basis of a predetermined parameter.

To provide an islanding operation detection device that does not induce a voltage flicker phenomenon.SOLUTION: An islanding operation detection device 3 for detecting islanding operation of a power conditioner 1 comprises: a frequency detection unit 31 for detecting a frequency f of an output voltage of the power conditioner 1; a voltage detection unit 32 for detecting a size of an output voltage of the power conditioner 1; a first determination unit 331 for determining whether or not the frequency f detected by the frequency detection unit 31 meets with a first determination condition; a second determination unit 332 for determining whether or not a size of an output voltage detected by the voltage detection unit 32 meets with a second determination condition; and a logical AND unit 333 for determining that the power conditioner is in an islanding operation state when a state in which the first determination unit 331 has determined that the first determination condition is met and the second determination unit 332 has determined that the second determination condition is met, continues for a predetermined time or more.SELECTED DRAWING: Figure 1

According to an embodiment, a reverse flow power control device includes: an input unit that accepts actual values of output power of the power conditioner, load power with respect to the load device, and reception power, and a minimum reception power value; a storage unit; and a calculator having an output controller that calculates an output command calculation value, a load controller that calculates a load command calculation value, and a command value re-calculator that calculates, by using the respective actual values, the output command calculation value, the load command calculation value, and the minimum reception power value, an output command value with respect to the power conditioner, in order to prevent a reception power value from the power system from becoming less than the minimum reception power value.

A regulated charge pump circuit supplies an output voltage. A reference generation circuit generates a feedback current used to generate a level shifted version of the output voltage as a feedback voltage. A charge pump clock generation circuit generates a clock signal for the charge pump according to the difference between a reference voltage and the feedback voltage. The charge pump boosts the reference voltage. The feedback current flows through a feedback resistor coupled between an output of the charge pump and an input of the charge pump clock generation circuit to generate the feedback voltage. An amplifier in the reference generation circuit generates a gate signal for a transistor based on a reference voltage and another feedback voltage generated using the feedback current flowing through a reference resistor. The transistor controls the feedback current, which flows through the feedback resistor, the transistor, and the reference resistor.

As shown in the reference diagram illustrating its use, this product is primarily intended to protect power conditioners and junction boxes installed at high positions such as poles and utility poles, or on the ground, in solar power generation facilities. It is used to surround these components to prevent theft and keep people away from them.

This invention relates to a hybrid energy storage railway power regulator technology under a virtual motor control system. It introduces a virtual inertial element into the current compensation strategy of the railway power regulator and employs virtual DC motor control in the hybrid energy storage system. Power quality is managed through the railway power regulator, and regenerative braking energy is recovered and utilized by connecting to the hybrid energy storage device. A segmented adaptive power allocation strategy based on the filtering time constant of the energy storage unit's state of charge and a dynamic adjustment strategy for limited power within the hybrid energy storage system are adopted. By adjusting the filtering time constant, "shallow charging and discharging" of the battery is ensured, with the supercapacitor handling the remaining power after the battery bears part of the load. A virtual inertial element is introduced to provide inertial support compared to the traditional control of railway power regulators, and virtual DC motor control is used for the hybrid energy storage system. This results in frequency stability under load fluctuations, as well as better dynamic performance and anti-interference capabilities.

This invention provides a DC cable monitoring system for solar power generation facilities that can determine whether an abnormality in a monitored DC cable is due to theft or a malfunction such as a failure. [Solution] The system includes a resistance value measuring means 20 that can measure the resistance value of a DC cable 6 connecting a power conditioner 5 to a power aggregation unit 4 that aggregates the DC power generated by the solar cell unit 3; an abnormal resistance value setting means 30 that sets a first lower limit L1 as the lower limit of the normal resistance value, and a second lower limit L2 which is a resistance value smaller than the first lower limit L1, based on the normal resistance value NR of the DC cable 6; and an abnormal condition determination means 50 that, when monitoring the cable, determines that a break has occurred in the DC cable 6 when the resistance value of the DC cable 6 is less than or equal to the first lower limit L1 and greater than or equal to the second lower limit L2, and determines that a malfunction other than a break has occurred in the DC cable 6 when the resistance value is less than the second lower limit L2.

A power inlet protection and monitoring device includes a power connection port configured to be on a vehicle and configured to have electrical characteristics when accepting power from an external power source, a monitoring module configured to measure electrical characteristics of the power connection port and configured to determine whether the electrical characteristics of the power connection port are in tolerance, wherein when the monitoring module determines that the electrical characteristics of the power connection port are out of tolerance or a fault may present, the monitoring module triggers one or more alarm conditions, and a power conditioner module that includes a surge protector configured to redirect an over voltage or over amperage.

The power regulator coordinate-converts a voltage detection value indicating a detection value of an output voltage of the inverter into a d-axis voltage detection value and a q-axis voltage detection value. The power regulator coordinates-converts a current detection value indicating a detection value of the output current of the inverter into a d-axis current detection value and a q-axis current detection value. The power regulator calculates the first current command value so that the d-axis voltage detection value approaches the d-axis voltage command value on the basis of a d-axis differential voltage, which is the difference between the d-axis voltage detection value and the d-axis voltage command value. The power regulator calculates a second current command value so that the q-axis voltage detection value approaches the q-axis voltage command value on the basis of a q-axis differential voltage, which is the difference between the q-axis voltage detection value and the q-axis voltage command value. The power regulator performs voltage control of the inverter such that the d-axis current detection value approaches the second current command value and the q-axis current detection value approaches the first current command value.