Lab Manual of Basic Electrical Engineering
... Percentage Error = (Pcalculated-Wattemter Reading) / Wattemter Reading ...
... Percentage Error = (Pcalculated-Wattemter Reading) / Wattemter Reading ...
Adaptive switching frequency buck DC–DC converter with high
... As can be seen from Equation (10), Isense is reduced with K times of IL , which guarantees high accuracy. The sum current of I1 and I2 is just 6 A, therefore, the efficiency will not be reduced by this current sensor. The proposed current sensor has better performance compared to the current sensor ...
... As can be seen from Equation (10), Isense is reduced with K times of IL , which guarantees high accuracy. The sum current of I1 and I2 is just 6 A, therefore, the efficiency will not be reduced by this current sensor. The proposed current sensor has better performance compared to the current sensor ...
Reactive Power Optimization for Voltage Stability Limit
... power system are synchronous generators and shunt capacitors. During a disturbance or contingency the real power demand does not change considerably but reactive power demand increases dramatically. This is due to increased voltage decay with increasing line losses and reduced reactive power generat ...
... power system are synchronous generators and shunt capacitors. During a disturbance or contingency the real power demand does not change considerably but reactive power demand increases dramatically. This is due to increased voltage decay with increasing line losses and reduced reactive power generat ...
Capacitor ESR, Equivalent Series Resistance Dissipation factor and
... Capacitors with high values of ESR will naturally need to dissipate power as heat. For some circuits with only low values of current, this may not be a problem, however in many circuits such as power supply smoothing circuits where current levels are high, the power levels dissipated by the ESR may ...
... Capacitors with high values of ESR will naturally need to dissipate power as heat. For some circuits with only low values of current, this may not be a problem, however in many circuits such as power supply smoothing circuits where current levels are high, the power levels dissipated by the ESR may ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... Modeling and control of dynamic systems belong to the fields in which fuzzy set techniques have received considerable attention, not only from the scientific community but also from industry. Many systems are not amenable to conventional modeling approaches due to the lack of precise, formal knowled ...
... Modeling and control of dynamic systems belong to the fields in which fuzzy set techniques have received considerable attention, not only from the scientific community but also from industry. Many systems are not amenable to conventional modeling approaches due to the lack of precise, formal knowled ...
A Novel Approach of Position Estimation, PFC based Buck
... source such as utility ac supply. Thus, for example, the primary source of input power may be utility ac voltage supply that is ‘converted’ to dc by an ac to dc converter and then ‘inverted’ back to ac using an inverter. Here, the final ac output may be of a different frequency and magnitude than th ...
... source such as utility ac supply. Thus, for example, the primary source of input power may be utility ac voltage supply that is ‘converted’ to dc by an ac to dc converter and then ‘inverted’ back to ac using an inverter. Here, the final ac output may be of a different frequency and magnitude than th ...
An Improved Topology for Symmetric, Asymmetric and
... Abstract: Multilevel converters have been used for several applications such as static reactive power compensation, adjustable speed drives, renewable energy sources, and so on. The principal function of multilevel converter is to synthesize a desired ac voltage from several separate dc sources. Man ...
... Abstract: Multilevel converters have been used for several applications such as static reactive power compensation, adjustable speed drives, renewable energy sources, and so on. The principal function of multilevel converter is to synthesize a desired ac voltage from several separate dc sources. Man ...
SVC to enable power boost into the New York area
... While the New York Power Authority (NYPA) was the overall responsible organization for the Marcy South Project, the utility operating in the Leeds area – Niagara Mohawk Power Corporation (NMPC) – was given the task of implementing the SVC in the system. The SVC was commissioned during the ...
... While the New York Power Authority (NYPA) was the overall responsible organization for the Marcy South Project, the utility operating in the Leeds area – Niagara Mohawk Power Corporation (NMPC) – was given the task of implementing the SVC in the system. The SVC was commissioned during the ...
1.1A, Single-Input 5-V Power Supply IC for
... Figure 1 presents a block diagram of a wireless power system, which consists of a transmitter and receiver. The transmitter consists of an AC-DC power stage, followed by a transmitter coil driver, coil voltage and coil current sensing block, and a wireless power controller (BQ500110). The receiver c ...
... Figure 1 presents a block diagram of a wireless power system, which consists of a transmitter and receiver. The transmitter consists of an AC-DC power stage, followed by a transmitter coil driver, coil voltage and coil current sensing block, and a wireless power controller (BQ500110). The receiver c ...
Comparison of Electric Springs with STATCOM for
... observed that the reactive power consumed by ES to restore the C load voltage to normal value is higher than the reactive power consumed by STATCOM to achieve the same voltage. This can be explained from Fig. 1. An increase in ES voltage will result in a decrease in NC load voltage. ...
... observed that the reactive power consumed by ES to restore the C load voltage to normal value is higher than the reactive power consumed by STATCOM to achieve the same voltage. This can be explained from Fig. 1. An increase in ES voltage will result in a decrease in NC load voltage. ...
Aalborg Universitet
... under grid frequency variation, its resonant frequency should be updated with the grid frequency, which can be easily estimated in a fast and accurate way as reported in [23]. Under weak grid, especially under unbalanced weak grid, it is very complex to carry out the control parameter design and sta ...
... under grid frequency variation, its resonant frequency should be updated with the grid frequency, which can be easily estimated in a fast and accurate way as reported in [23]. Under weak grid, especially under unbalanced weak grid, it is very complex to carry out the control parameter design and sta ...
Efficient Transmission Line Voltage Regulation Using Fuzzyfied Soft
... along the transmission lines and can cause large amplitude variations in the receiving end voltage. Most of loads are not tolerant to voltage variation. Under voltage causes degradation in the performance of loads such as induction motors, light bulbs, etc.; overvoltage causes magnetic saturation an ...
... along the transmission lines and can cause large amplitude variations in the receiving end voltage. Most of loads are not tolerant to voltage variation. Under voltage causes degradation in the performance of loads such as induction motors, light bulbs, etc.; overvoltage causes magnetic saturation an ...
Active inductor-based tunable impedance matching network for RF
... transferred power to the load, and also minimizes the returns from the load. The impedance matching occurs at a certain frequency (especially at the resonance frequency) and causes that the maximum power is transferred between the supply and load. For an efficient change in the load impedance of the ...
... transferred power to the load, and also minimizes the returns from the load. The impedance matching occurs at a certain frequency (especially at the resonance frequency) and causes that the maximum power is transferred between the supply and load. For an efficient change in the load impedance of the ...
portal.norwalkps.org
... • Determining power supply problem – Turn off PC, open computer case, set new power supply on top of the old one – Disconnect old power supply’s cords, plug PC devices into the new power supply – Turn on PC, verify new power supply solves problem A+ Guide to Managing and Maintaining your PC, 7e ...
... • Determining power supply problem – Turn off PC, open computer case, set new power supply on top of the old one – Disconnect old power supply’s cords, plug PC devices into the new power supply – Turn on PC, verify new power supply solves problem A+ Guide to Managing and Maintaining your PC, 7e ...
AN-8024 Applying Fairchild Power Switch (FPS ) FSBH-series to Standby Auxiliary Power Supply
... The highly integrated FSBH-series consists of an integrated current mode Pulse Width Modulator (PWM) and an avalanche-rugged 700V SenseFET. It is specifically designed for high-performance offline Switch-Mode Power Supplies (SMPS) with minimal external components. ...
... The highly integrated FSBH-series consists of an integrated current mode Pulse Width Modulator (PWM) and an avalanche-rugged 700V SenseFET. It is specifically designed for high-performance offline Switch-Mode Power Supplies (SMPS) with minimal external components. ...
W. Rieutort-Louis, L. Huang, Y. Hu, J. Sanz Robinson, S. Wagner, J. C. Sturm, and N. Verma, "A Complete Fully Thin-film PV Harvesting and Power-management System on Plastic with On-sheet Battery Management and Wireles Power Delivery to Off-sheet Loads", IEEE Photovoltaic Spec. Conf. (PVSC), Paper 68, Tampa, Fl (JUN 2013).
... resistive loads, Vbattery droops due to the voltage drop across the blocking diode required to sustain IPm gt . A critical condition can be identified where, for a given solar module voltage (Vsolar ), Vbattery has drooped to the point that the charging current (IBatt ) drops to zero (at which point ...
... resistive loads, Vbattery droops due to the voltage drop across the blocking diode required to sustain IPm gt . A critical condition can be identified where, for a given solar module voltage (Vsolar ), Vbattery has drooped to the point that the charging current (IBatt ) drops to zero (at which point ...
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.