Aalborg Universitet
... Distribution Management Systems (DMS), which implement the highest level of the hierarchy of controllers within microgrids [1]. They take care of control functions such as optimized real and reactive ...
... Distribution Management Systems (DMS), which implement the highest level of the hierarchy of controllers within microgrids [1]. They take care of control functions such as optimized real and reactive ...
3 Connecting the ISA 3000
... You connect DC power to the device through the front panel connectors. The device has a dual-feed DC power supply; two connectors provide primary and secondary DC power (DC-A and DC-B). Each power connector has an LED status indicator. The device power connectors are attached to the device chassis. ...
... You connect DC power to the device through the front panel connectors. The device has a dual-feed DC power supply; two connectors provide primary and secondary DC power (DC-A and DC-B). Each power connector has an LED status indicator. The device power connectors are attached to the device chassis. ...
Low-Voltage Bipolar-Type DC Microgrid for Super High Quality
... Abstract—Microgrid is one of the new conceptual power systems for smooth installation of many distributed generations (DGs). While most of the microgrids adopt ac distribution as well as conventional power systems, dc microgrids are proposed and researched for the good connection with dc output type ...
... Abstract—Microgrid is one of the new conceptual power systems for smooth installation of many distributed generations (DGs). While most of the microgrids adopt ac distribution as well as conventional power systems, dc microgrids are proposed and researched for the good connection with dc output type ...
High Current Power Supply, Cat. No. BT406
... 2. Do not alter the equipment. Failure to follow these directions could result in personal and/or laboratory hazards, as well as invalidate equipment warranty. 3. Use a properly grounded electrical outlet with correct voltage and current handling capacity. 4. Disconnect from power supply before main ...
... 2. Do not alter the equipment. Failure to follow these directions could result in personal and/or laboratory hazards, as well as invalidate equipment warranty. 3. Use a properly grounded electrical outlet with correct voltage and current handling capacity. 4. Disconnect from power supply before main ...
Liebert GXT4 Intelligent, Reliable UPS Protection
... The Liebert® GXT4™ UPS requires just a slim 2U of rack space, but provides the capabilities often found only in larger systems. Get up to 3kVA of capacity and battery backup. External battery cabinets may be added for extended run time. Liebert GXT4 UPS is a true on-line power source, which means po ...
... The Liebert® GXT4™ UPS requires just a slim 2U of rack space, but provides the capabilities often found only in larger systems. Get up to 3kVA of capacity and battery backup. External battery cabinets may be added for extended run time. Liebert GXT4 UPS is a true on-line power source, which means po ...
Introduction
... v an t VY cost Van VY 0 o v bn t VY cost 120 o Vbn VY 120 o v cn t VY cost 120 o Vcn VY 120 o ...
... v an t VY cost Van VY 0 o v bn t VY cost 120 o Vbn VY 120 o v cn t VY cost 120 o Vcn VY 120 o ...
simulation of different power transmission systems
... acceptability, and the cost of available energy. The wheeling of this available energy through existing long AC lines to load centers have a certain upper limit due to stability considerations. Thus, these lines are not loaded to their thermal limit to keep sufficient margin against transient instab ...
... acceptability, and the cost of available energy. The wheeling of this available energy through existing long AC lines to load centers have a certain upper limit due to stability considerations. Thus, these lines are not loaded to their thermal limit to keep sufficient margin against transient instab ...
Paper Title (use style: paper title)
... in Fig. 1. The 4H-SiC IGBTs utilized in this experiment were vertical power devices with a P-type, 300-µm substrate and an epitaxially-grown N-type drift region with a thickness of 230 µm. The devices have a double-diffused MOS structure, an asymmetrical punch-through design, and a field-stop buffer ...
... in Fig. 1. The 4H-SiC IGBTs utilized in this experiment were vertical power devices with a P-type, 300-µm substrate and an epitaxially-grown N-type drift region with a thickness of 230 µm. The devices have a double-diffused MOS structure, an asymmetrical punch-through design, and a field-stop buffer ...
PDF
... treating SVC susceptance as control variable. Assuming that SVC is connected at node-p to maintain the bus voltage at Vp, the reactive power injected by the controller is given by (5). ...
... treating SVC susceptance as control variable. Assuming that SVC is connected at node-p to maintain the bus voltage at Vp, the reactive power injected by the controller is given by (5). ...
Dimensioning a UPS for LED crest factor
... UPS and inverter backup units can be classified in two main categories, true sine wave and “quasi” or “simulated” sine output and are usually specified by their VA and Watt rating. Oscillogram 1 shows the voltage (red) and load current (yellow) of typical 600VA “quasi-sine” UPS with 10x Verbatim 8.5 ...
... UPS and inverter backup units can be classified in two main categories, true sine wave and “quasi” or “simulated” sine output and are usually specified by their VA and Watt rating. Oscillogram 1 shows the voltage (red) and load current (yellow) of typical 600VA “quasi-sine” UPS with 10x Verbatim 8.5 ...
NL3423822388
... The CSIs are less investigated and applied, compared to VSIs, partly because the switches of the CSIs have to be reverse blocking. It has the advantages of directly supporting regeneration back to the AC supply when supplied from an SCR rectifier, implicit output, and short circuit protection, and s ...
... The CSIs are less investigated and applied, compared to VSIs, partly because the switches of the CSIs have to be reverse blocking. It has the advantages of directly supporting regeneration back to the AC supply when supplied from an SCR rectifier, implicit output, and short circuit protection, and s ...
Aalborg Universitet
... DGs and also the proposed control strategy for the DGs inverters. This system consists of a DC prime mover, an inverter and a LC filter for each DG and also an inductor between each DG and load connection point which models the distribution line. Also, a single-phase load is connected between two ph ...
... DGs and also the proposed control strategy for the DGs inverters. This system consists of a DC prime mover, an inverter and a LC filter for each DG and also an inductor between each DG and load connection point which models the distribution line. Also, a single-phase load is connected between two ph ...
Critical Points of Simplified Model for Ferroresonance Phenomenon in Single Phase Power Transformers
... The calculated results dictate a jump up in primary induced voltage V2 from 80.19V to 128.73V due to ferroresonance at supply voltage V1 of 42.59 V. The calculated results dictate a jump down in primary induced voltage V2 from 115.1V to 44.86V due to ferroresonance at supply voltage V1 of 30.42 ...
... The calculated results dictate a jump up in primary induced voltage V2 from 80.19V to 128.73V due to ferroresonance at supply voltage V1 of 42.59 V. The calculated results dictate a jump down in primary induced voltage V2 from 115.1V to 44.86V due to ferroresonance at supply voltage V1 of 30.42 ...
Average Current Control Mode Boost Converter for
... commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ...
... commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ...
Power factor
In electrical engineering, the power factor of an AC electrical power system is defined as the ratio of the real power flowing to the load to the apparent power in the circuit, and is a dimensionless number in the closed interval of -1 to 1. A power factor of less than one means that the voltage and current waveforms are not in phase, reducing the instantaneous product of the two waveforms (V x I). Real power is the capacity of the circuit for performing work in a particular time. Apparent power is the product of the current and voltage of the circuit. Due to energy stored in the load and returned to the source, or due to a non-linear load that distorts the wave shape of the current drawn from the source, the apparent power will be greater than the real power. A negative power factor occurs when the device (which is normally the load) generates power, which then flows back towards the source, which is normally considered the generator.In an electric power system, a load with a low power factor draws more current than a load with a high power factor for the same amount of useful power transferred. The higher currents increase the energy lost in the distribution system, and require larger wires and other equipment. Because of the costs of larger equipment and wasted energy, electrical utilities will usually charge a higher cost to industrial or commercial customers where there is a low power factor.Linear loads with low power factor (such as induction motors) can be corrected with a passive network of capacitors or inductors. Non-linear loads, such as rectifiers, distort the current drawn from the system. In such cases, active or passive power factor correction may be used to counteract the distortion and raise the power factor. The devices for correction of the power factor may be at a central substation, spread out over a distribution system, or built into power-consuming equipment.