SPIMs are categorized as split-phase (resistance-start) motor, capacitor-start motor, capacitor-run motor, capacitor-start capacitor-run motor, and shaded-pole motor [1], [35], [36], [37]. In split-phase motor, a centrifugal switch is connected in series with auxiliary winding. The main and auxiliary currents are out of phase because of different reactance in the …
Figure 1 is an illustration of the capacitor bank control philosophy. The SEL-734 continuously monitors the bus voltage and load current to provide automatic control of two capacitor banks. When the bus voltage is above the voltage inhibit threshold and automatic control is enabled, the capacitor bank control logic is active.
Intelligent Capacitor Bank Control Many renewable energy resources, such as solar and wind, utilize dc to ac converters for electrical grid interconnections. During the dc to ac conversion, an inverter produces harmonics due to switching and nonideal power factor.
Capacitor controls are specifically engineered for the control of pole-mounted and pad-mounted switched capacitor banks in electric distribution systems. They benefit utilities by reducing unused capacity, regulating voltage, monitoring line conditions, and protecting capacitor banks.
When the bus voltage is above the voltage inhibit threshold and automatic control is enabled, the capacitor bank control logic is active. The SEL-734 begins timing to close capacitor banks when any phase of the bus voltage is below the low-voltage override threshold.
Typically, a utility installs a capacitor bank on a distribution system for voltage and VAR support, but these capacitors also provide harmonic isolation and power factor correction that are perfect for interconnecting renewable energy resources.
Conversely, the control logic begins timing to trip energized capacitor banks when any phase of the bus voltage is above the high-voltage override threshold. Low- and high-voltage dead bands are provided to reduce the likelihood of hunting.
SPIMs are categorized as split-phase (resistance-start) motor, capacitor-start motor, capacitor-run motor, capacitor-start capacitor-run motor, and shaded-pole motor [1], [35], [36], [37]. In split-phase motor, a centrifugal switch is connected in series with auxiliary winding. The main and auxiliary currents are out of phase because of different reactance in the …
Abstract: The paper provides a comprehensive review regarding the usage of SVC''s along with intelligent techniques. With high inductive loads like machine, arc wielding, …
Abstract: A dynamic voltage restorer (DVR) is developed to stabilize the three-phase load voltage under the sudden grid voltage distortion conditions, including the voltage sag, swell and unbalance. The DVR is composed of a DC $backslash $ AC inverter and a DC-link capacitor regarded as the energy storage element. When the sudden grid voltage distortion …
Design of Intelligent On-load Tap Changer Controlled by Permanent Magnetic Actuator Jinqiu DENG, Guogang ZHANG*, Yingsan GENG, Jianhua WANG State Key Lab of Electrical Insulation and Power ...
Abstract: The split-capacitor midpoint-clamped three-phase four-leg (3P4L) inverter is capable of sustaining stable output with three-phase symmetrical voltages under both …
Intelligent Controlled Dynamic Voltage Restorer for Improving Transient Voltage Quality Kuang-Hsiung Tan 1, Member, IEEE, Jun -H ao Chen 1, and Yih-Der Lee 2
Among them are electronically controlled capacitor [15,28,78–85], triac-based control [6,9,26,27,86–91], artificial intelligent based controllers [92,93], frog jumping technique [94], Integral (Half) Cycle Control [95,96], and Integral Switched Cycle Control [97]. An extensive study to investigate the capability of a single-phase electronically controlled capacitor IM is …
, the compensation resonant capacitor is 58nF, the phase-controlled tuning capacitor is 10nF, and the coil distance is 10cm. The load is connected by 10W LED bulb group. When a capacitor at the receiving end is removed, the phase-controlled capacitor circuit is not added at this time, the WPT system is detuned, and the phase
During the switching on/off of shunt capacitor banks in substations, vacuum circuit breakers (VCBs) are required to switch off or to switch on the capacitive current. Therefore, the VCBs have to be operated under a harsh condition to ensure the reliability of the equipment. This study presents a complete comparison study of ordinary and phase-controlled VCBs on switching 10 …
DSP-based intelligent split-phase self-adaption reactive power compensation controller was designed to real-time monitor the dynamic reactive power compensation of power grid parameters.
In this paper, a fuzzy logic-controlled shunt active power filter capable of reducing the total harmonic distortion is developed. The optimal controllers for the control of DC voltage …
In this paper, the method for phase-controlled capacitor circuit is proposed. Firstly, make an simply introduction of phase-controlled capacitor circuit and corresponding control algorithm. …
A three-phase balanced fault (ABC-type) is initiated on line 39–9 at 180 km from relaying pointwhile the wind speed is 15 m/s. The suggested approach detects the symmetrical fault in 4 ms after the commencement of fault at 40 ms. The faulty phases are detected by the fault classification module in 2 ms after fault detection.
In this paper, a dual-phase-shift control strategy combining with a switch-controlled capacitor (SCC) is proposed to realize efficiency maximization while realizing zero voltage switching …
Abstract: Isolated resonant switched capacitor converter (I-RSCC) reduces the amount of required switching devices by multiplexing parts switching devices. But its voltage conversion ratio and …
ZThree-phase grid voltages. LRss, Grid impedance. C dc DC-link capacitor. LC filter. T sf Series transformer. Vdc DC-link voltage. vc DC Three -phase compensating voltages of DVR. vc Three -phase ...
Intelligent capacitor Compensation mode: S three-phase compensation F split-phase compensation Secondary compensation capacity (unit: kVar) MODEL PRODUCT FEATURE Note: split-phase compensation is without secondary compensation capacity Switching switch device has strong withstand voltage impact ability and withstand strike current ability …
The DRV7308 is a three-phase intelligent power module (IPM) that consists of 205mΩ, 650V e-mode Gallium-Nitride (GaN) for driving three-phase BLDC/ PMSM motors up to 450V DC rails. The applications include field-oriented control (FOC), sinusoidal current control, and trapezoidal (six step) current control of BLDC motors. The device helps to achieve more …
Intelligent capacitor is a self-healing low-voltage power capacitor as the main body, intelligent measurement and control processor as the control center, microelectronics software and hardware technology to achieve over-zero control of the thyristor, the contacts of the …
The single-phase half-wave rectifier uses a single thyristor to control the load voltage as shown in Fig. 7.3.The thyristor will conduct, on-state, when the voltage v T is positive and a firing current pulse i G is applied to the gate terminal. The control of the load voltage is performed by delaying the firing pulse by an angle α.The firing angle α is measured from the …
In this study, a three-phase four-wire distribution static compensator (DSTATCOM) is proposed to improve power quality, including the compensation of the three-phase unbalanced grid currents, the total harmonic distortion (THD) reduction of the grid current, and the power factor (PF) correction. Moreover, when different types of loads vary in the …
When the AC contactor switches the capacitor bank, the phase angle of the power grid is random, so the electromagnetic transient process will generate large inrush current and overvoltage, causing large disturbance to the power system. A set of AC contactor with permanent magnetic actuator (PMA) and its intelligent phase selection control system are designed to solve this …
thyristor-controlled series capacitor (TCSC) to be used for transient stability with the tuning of its parameters being developed as an optimization problem to be solved using intelligent techniques like the harmony search algorithm, quasi-oppositional harmony search (QOHS) algorithm, and genetic algorithm (GA). Thyristor-controlled
The single-phase half-wave rectifier uses a single thyristor to control the load voltage as shown in Fig. 8.2.The thyristor will conduct, on-state, when the voltage v T is positive and a firing current pulse i G is applied to the gate terminal. The control of the load voltage is performed by delaying the firing pulse by an angle α.The firing angle α is measured from the …
ELECTRONIC CONTROLLED CAPACITOR FOR SINGLE PHASE INDUCTION MOTOR Radu CAMPEANU*, Constantin SUCIU*, Aurel CAMPEANU** *"Transilvania" University of Brasov; [email protected] **University of Craiova Abstract − This paper presents an electronic controlled capacitor used to increase the efficiency of the Single Phase Induction …
Abstract: The split-capacitor midpoint-clamped three-phase four-leg (3P4L) inverter is capable of sustaining stable output with three-phase symmetrical voltages under both balanced/unbalanced and linear/non-linear loads. This topology achieves the clamping of the neutral point of the three-phase load at V dc /2 by controlling the fourth leg, thus separating the control of the fourth leg …
Automatic Capacitor Controls The Intelligent Alternative to Electromechanical Capacitor Controls . 2 S&C IntelliCAP Automatic Capacitor Controls are specifically engineered for the control of pole-mounted and pad-mounted switched capacitor banks in electric distribution systems.These reliable, easy- to-use, flexible devices give you the benefits of an intelligent, microprocessor …
This paper presents the design, simulation, and measurements of a low power, low phase noise 10.25–11.78 GHz LC digitally controlled oscillator (LC DCO) with extended true single phase clock (E-TSPC) frequency divider in 130 nm complementary metal–oxide–semiconductor (CMOS) technology for 5G intelligent transport systems. The …
The YCFK intelligent capacitor switching device uses thyristor switch and magnetic holding switch in parallel operation. It has the advantage of controllable silicon zero-crossing switch
IntelliCap 2000 Automatic Capacitor Controls are specifically designed to control pole-mounted and pad-mounted switched capacitor banks in electric distribution systems, to regulate reactive power or line voltage. These reliable, easy-to …
application of phase-controlled circuit breaker in switching 10kV shunt capacitor bank was studied. The effectiveness of phase-controlled circuit breaker was verified in the actual power system. However, there is no research on the field test of the phase-controlled circuit breaker in the actual 35kV reactive power compensation system ...
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