A Better Understanding of Harmonic Distortion in the Petrochemical
... electronic equipment is to install the equipment on a strong power source. However, that factor is usually not a controllable variable in the petrochemical industry. System capacitance can be a source of problems when using power electronic devices in the petrochemical industry. ...
... electronic equipment is to install the equipment on a strong power source. However, that factor is usually not a controllable variable in the petrochemical industry. System capacitance can be a source of problems when using power electronic devices in the petrochemical industry. ...
RF3230 QUAD-BAND GMSK TXM, 2 UMTS SWITCH PORTS Features
... Product Description The RF3230 is a high-power, high-efficiency transmit module with integrated power control, an integrated pHEMT front end switch, and harmonic filtering functionality. This device is self-contained with 50 input and output terminals and no external matching circuits required. The ...
... Product Description The RF3230 is a high-power, high-efficiency transmit module with integrated power control, an integrated pHEMT front end switch, and harmonic filtering functionality. This device is self-contained with 50 input and output terminals and no external matching circuits required. The ...
Static Var Compensator is system for the incresing power of qu
... The task of control system is to find out by measuring of load the correct firing angle of the thyristor valves to compensate the reactive power. All the logical decisions of the SVC are concentrated in the control system. The PLC in the control system collects information from the control system it ...
... The task of control system is to find out by measuring of load the correct firing angle of the thyristor valves to compensate the reactive power. All the logical decisions of the SVC are concentrated in the control system. The PLC in the control system collects information from the control system it ...
MAX5021/MAX5022 Current-Mode PWM Controllers for Isolated Power Supplies General Description
... The MAX5021/MAX5022 are current-mode PWM controllers that have been specifically designed for use in isolated power supplies. An undervoltage lockout circuit (UVLO) with a large hysteresis (14V) along with very low startup and operating current result in highefficiency, universal input power supplie ...
... The MAX5021/MAX5022 are current-mode PWM controllers that have been specifically designed for use in isolated power supplies. An undervoltage lockout circuit (UVLO) with a large hysteresis (14V) along with very low startup and operating current result in highefficiency, universal input power supplie ...
Static Voltage Stability Using FACTS Controllers
... post-contingency cases must be determined. Providing adequate reactive power support at the appropriate location solves voltage instability problems. There are many reactive compensation devices used by the utilities for this purpose, each of which has its own characteristics and limitations. Howeve ...
... post-contingency cases must be determined. Providing adequate reactive power support at the appropriate location solves voltage instability problems. There are many reactive compensation devices used by the utilities for this purpose, each of which has its own characteristics and limitations. Howeve ...
Discrimination of residual-current protective
... Simply select an operating mode and enter a value between 0 and 1 for the Ks parameter. The value becomes the default value for the current operating mode (the lock next to the parameter closes ) and Ecodial will no longer modify the value as a function of the number of outgoers. In the other operat ...
... Simply select an operating mode and enter a value between 0 and 1 for the Ks parameter. The value becomes the default value for the current operating mode (the lock next to the parameter closes ) and Ecodial will no longer modify the value as a function of the number of outgoers. In the other operat ...
Seminar Report
... devices, harmonic overloads, high levels of voltage and current distortion, temperature rise in conductors and all contributeto reducing the quality and the reliability of a low-voltage AC system. The above disturbances are well and directly related to the proliferationof loads consuming non-sinusoi ...
... devices, harmonic overloads, high levels of voltage and current distortion, temperature rise in conductors and all contributeto reducing the quality and the reliability of a low-voltage AC system. The above disturbances are well and directly related to the proliferationof loads consuming non-sinusoi ...
Blackstart of An Induction Motor in An Autonomous Microgrid
... Abstract—Starting of large induction motors may produce voltage dip in a weak microgrid because of high current and reactive power demand in transient period. This paper develops a solution for black start issue of an Induction Motor (IM) using Voltage-Sourced Converter (VSC) interfaced source in an ...
... Abstract—Starting of large induction motors may produce voltage dip in a weak microgrid because of high current and reactive power demand in transient period. This paper develops a solution for black start issue of an Induction Motor (IM) using Voltage-Sourced Converter (VSC) interfaced source in an ...
A distributed voltage stability margin for power
... A geometric interpretation of the phenomena has been developed by Chiang et al. (1990), and starting from Tamura et al. (1983) voltage collapse has been related to the appearance of bifurcations in the solutions of the nonlinear power flow equations. More recently, semidefinite programming has been ...
... A geometric interpretation of the phenomena has been developed by Chiang et al. (1990), and starting from Tamura et al. (1983) voltage collapse has been related to the appearance of bifurcations in the solutions of the nonlinear power flow equations. More recently, semidefinite programming has been ...
High Reliability Multiport Multiphase DC Hub
... A. Topology of the hub Topology of the proposed multiphase N-port LCL DC hub is shown in Fig. 1 where a 4-phase topology is illustrated. At first glance, the LCL DC hub looks like a number of LC-filter based VSC converters paralleled at the AC side. However, the LC circuit in the LCL DC hub is not u ...
... A. Topology of the hub Topology of the proposed multiphase N-port LCL DC hub is shown in Fig. 1 where a 4-phase topology is illustrated. At first glance, the LCL DC hub looks like a number of LC-filter based VSC converters paralleled at the AC side. However, the LC circuit in the LCL DC hub is not u ...
U04405117121
... high power factor and low THD, use of power factor corrector is required. Boost converters are mostly preferred as active power factor corrector [1] in this respect, due to its capability of drawing continuous input current. This continuous input current can be controlled by various current mode con ...
... high power factor and low THD, use of power factor corrector is required. Boost converters are mostly preferred as active power factor corrector [1] in this respect, due to its capability of drawing continuous input current. This continuous input current can be controlled by various current mode con ...
Line to Ground Voltage Monitoring on Ungrounded
... line to ground fault the voltage across the transformer will be equal to the system line to line voltage, providing maximum current flow. The value of “R” is selected such that transformer’s burden rating is not exceeded. This is the lowest value of “R” that can be used on this transformer. If this ...
... line to ground fault the voltage across the transformer will be equal to the system line to line voltage, providing maximum current flow. The value of “R” is selected such that transformer’s burden rating is not exceeded. This is the lowest value of “R” that can be used on this transformer. If this ...
Bulletin 7604-00E WT210/WT230 Digital Power Meters
... and phase angle (deg) are calculated from voltage, current, and active power. (Therefore, if the input contains a distorted wave, the values may not match those of other measuring instruments based on different measurement principles.) 2. If either voltage or current falls to 0.5%(for crest factor 3 ...
... and phase angle (deg) are calculated from voltage, current, and active power. (Therefore, if the input contains a distorted wave, the values may not match those of other measuring instruments based on different measurement principles.) 2. If either voltage or current falls to 0.5%(for crest factor 3 ...
Analysis of a Multilevel Dual Active Bridge (ML-DAB) DC-DC
... have been reported in [8]. The multilevel DAB (ML-DAB) can overcome this voltage constraint of semiconductor switches to a great extent. The ML-DAB can be used in medium voltage (generally 2.3 kV to 6.6 kV [9]) applications without cascading or, if cascaded, can reduce the number of cascading module ...
... have been reported in [8]. The multilevel DAB (ML-DAB) can overcome this voltage constraint of semiconductor switches to a great extent. The ML-DAB can be used in medium voltage (generally 2.3 kV to 6.6 kV [9]) applications without cascading or, if cascaded, can reduce the number of cascading module ...
1770-4.1, Industrial Automation Wiring and
... Shielded Cables — Certain I/O connections require shielded cables to help reduce the effects of electrical noise coupling. Ground each shield at one end only. A shield grounded at both ends forms a ground loop which can cause a processor to fault. Ground each shield at the end specified in the appro ...
... Shielded Cables — Certain I/O connections require shielded cables to help reduce the effects of electrical noise coupling. Ground each shield at one end only. A shield grounded at both ends forms a ground loop which can cause a processor to fault. Ground each shield at the end specified in the appro ...
equal-area criterion applied on power transfer corridors
... Equal-Area Criterion, Power System Stability, Wide Area Monitoring, Protection and Control, Security Assessment, Power Transfer Corridor ...
... Equal-Area Criterion, Power System Stability, Wide Area Monitoring, Protection and Control, Security Assessment, Power Transfer Corridor ...
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.