Interconnect Protection of IPP Generators Using Digital Technology
... In some applications rater of change of frequency (81R) is used. If feeder load and IPP generation are near a match, transfer trip (TT) maybe required. ...
... In some applications rater of change of frequency (81R) is used. If feeder load and IPP generation are near a match, transfer trip (TT) maybe required. ...
Full PowerPoint
... between the input reaching 50% of its final value and the output to reaching 50% of final value. • Today’s case, using “perfect input” (50% reached at t=0): 0.5 = e-tp tp = - ln 0.5 = 0.69 It takes 0.69 time constants, or 0.69 RC. • We can find the time it takes for the output to reach other desired ...
... between the input reaching 50% of its final value and the output to reaching 50% of final value. • Today’s case, using “perfect input” (50% reached at t=0): 0.5 = e-tp tp = - ln 0.5 = 0.69 It takes 0.69 time constants, or 0.69 RC. • We can find the time it takes for the output to reach other desired ...
Aalborg Universitet A Systematic Method to Synthesize New Transformerless Full-bridge Grid-tied Inverters
... full-bridge topologies, which means that large quantities of PV panels in series are required, or that a boost DC/DC converter with an extremely high voltage transfer ratio is necessary as the first power conditioning stage and system efficiency may be adversely affected. When two inductors are work ...
... full-bridge topologies, which means that large quantities of PV panels in series are required, or that a boost DC/DC converter with an extremely high voltage transfer ratio is necessary as the first power conditioning stage and system efficiency may be adversely affected. When two inductors are work ...
4.4 Electrical conductivity of minerals and rocks
... An important net effect is that when water is added to clay the concentration of ions is increased in the solution in the vicinity of the clay surface. While some of these released ions and polar water molecules held tightly to the surface, the fixed layer (or Stern layer), others are held less stro ...
... An important net effect is that when water is added to clay the concentration of ions is increased in the solution in the vicinity of the clay surface. While some of these released ions and polar water molecules held tightly to the surface, the fixed layer (or Stern layer), others are held less stro ...
MT-060 TUTORIAL Choosing Between Voltage Feedback (VFB)
... The output offset voltage due to the input bias currents can be nulled by making the effective source resistance equal in both the inverting and non-inverting inputs. This scheme will not work with bias-current compensated VFB op amps which have additional current generators on their inputs. In this ...
... The output offset voltage due to the input bias currents can be nulled by making the effective source resistance equal in both the inverting and non-inverting inputs. This scheme will not work with bias-current compensated VFB op amps which have additional current generators on their inputs. In this ...
ZX5T3Z
... written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instruct ...
... written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instruct ...
Z8 Encore! -Based Battery Charger
... At the core of a battery charger is the DC–DC converter that acts as a regulated power source. The charger hardware is capable of regulating its output in various modes, such as constant voltage, constant current, or constant voltage with a current limit. The charger can be viewed as a control syste ...
... At the core of a battery charger is the DC–DC converter that acts as a regulated power source. The charger hardware is capable of regulating its output in various modes, such as constant voltage, constant current, or constant voltage with a current limit. The charger can be viewed as a control syste ...
Datasheet
... Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use ...
... Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use ...
AN29 - Some Thoughts on DC-DC Converters
... L1 and L2 combine with their respective output capacitors to aid low noise characteristics. These inductors are outside the feedback loop, but their low copper resistance does not significantly degrade regulation. Trace D, the 15V output at full load, shows less than 30µV (2ppm) of noise. The most s ...
... L1 and L2 combine with their respective output capacitors to aid low noise characteristics. These inductors are outside the feedback loop, but their low copper resistance does not significantly degrade regulation. Trace D, the 15V output at full load, shows less than 30µV (2ppm) of noise. The most s ...
Speed of Line Protection – Can We Break Free of Phasor
... Most electromechanical, solid-state, and microprocessorbased relays effectively operate on phasor-based principles. Relays using phasors apply filtering so that they respond to the fundamental frequency signal components. Their operating principles are derived assuming the filtered signals have near ...
... Most electromechanical, solid-state, and microprocessorbased relays effectively operate on phasor-based principles. Relays using phasors apply filtering so that they respond to the fundamental frequency signal components. Their operating principles are derived assuming the filtered signals have near ...
Claudio`s slides (PDF download)
... Mr. Mardegan participates in the Generator Grounding, Surge Protecttion, Forensics, DC, 3003-series and 3004-series working groups. He is chair of 3004.8 (Ground Fault Protection) and 3004.13 (Overcurrent Coordination). He has extensive experience in design, assembling, commissioning, maintenance, c ...
... Mr. Mardegan participates in the Generator Grounding, Surge Protecttion, Forensics, DC, 3003-series and 3004-series working groups. He is chair of 3004.8 (Ground Fault Protection) and 3004.13 (Overcurrent Coordination). He has extensive experience in design, assembling, commissioning, maintenance, c ...
R.C.N. Pilawa-Podgurski, D. Giuliano, and D.J. Perreault, “Merged Two-Stage Power Converter Architecture with Soft Charging Switched-Capacitor Energy Transfer,” 2008 IEEE Power Electronics Specialists Conference , June 2008, pp. 4008 – 4015
... period of time, the voltage across the capacitor will charge up to Vin , and the voltage across the resistor will become 0 V. The voltage across the resistor and the current through it results in a power loss during the charging phase of the capacitor which depends on the capacitance and the net cha ...
... period of time, the voltage across the capacitor will charge up to Vin , and the voltage across the resistor will become 0 V. The voltage across the resistor and the current through it results in a power loss during the charging phase of the capacitor which depends on the capacitance and the net cha ...
A Static Phase Offset Reduction Technique for Multiplying Delay
... The cyclic reference injection based MDLL shown in Figure 1(b) is very similar as a PLL except for the extra MUX and Select Logic blocks. With the MUX, the VCDL output is fed back to its input, and forms a ring VCO as MUX control signal Sel is 0. When Sel changes to 1, the rising edge of reference s ...
... The cyclic reference injection based MDLL shown in Figure 1(b) is very similar as a PLL except for the extra MUX and Select Logic blocks. With the MUX, the VCDL output is fed back to its input, and forms a ring VCO as MUX control signal Sel is 0. When Sel changes to 1, the rising edge of reference s ...
Chapter 11 Shielded Metal Arc Welding Principles
... • Equipment less complex, more portable and less costly • Can be done indoors or outdoors, in any location and any position • Electrodes available to match properties and strength of most base metals – Not used for welding softer metals – Not as efficient in deposition ...
... • Equipment less complex, more portable and less costly • Can be done indoors or outdoors, in any location and any position • Electrodes available to match properties and strength of most base metals – Not used for welding softer metals – Not as efficient in deposition ...
Current source
A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it.A current source is the dual of a voltage source. The term constant-current 'sink' is sometimes used for sources fed from a negative voltage supply. Figure 1 shows the schematic symbol for an ideal current source, driving a resistor load. There are two types - an independent current source (or sink) delivers a constant current. A dependent current source delivers a current which is proportional to some other voltage or current in the circuit.