The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Distributed static series compensator (DSSC) is a new type of distributed FACTS devices that can realize accurate control of power flow and enhance voltage stability. Thus, it could be installed in stability-limited transmission systems widely. This paper presents a new capacity control model for DSSCs and deduces the corresponding power flow equations. To illustrate the effect on system power voltage...
In the power grid lacking conventional power sources for black start, adopting wind farm as a power source for black start is a beneficial attempt. With Jangsu local power grid as research object in China, and combining with the special geographical and demand of the local power grid, a black start scheme using permanent-magnet synchronous generator(PMSG)-based wind farm as black start power is proposed...
In order to solve the voltage over-limit problem of distributed photovoltaic(PV) connected to string lines, it is feasible to fully utilize the reactive power regulation ability of PV systems to adjust the line's voltage. In this paper, based on analyzing the mechanism of the point of interconnection(POI) of PV systems voltage over-limit and the voltage sensitivity of low-voltage string lines, a reactive...
Buck converter using hysteresis controller has been widely used for power supply in industry applications owing to its instantaneous load transient. However the equivalent series resistance (ESR) of output capacitor has a significant effect for the stability performance. In this paper, the critical value of ESR is analyzed and calculated in the hysteresis controlled buck converter. Finally, simulation...
In view of the fact that there are difficulties for traditional current-controlled grid-connected inverter in power decoupling and voltage regulation at point of common coupling (PCC). Voltage-controlled grid-connected inverter can cope with these issues by completing the control strategy of voltagecontrolled inverter. Based on theoretical analysis and experimental results, this paper proposed two...
In order to increase the output voltage range of photovoltaic panels, battery and fuel cell monomer efficiently in the distributed generation system, In this paper, a novel Z-source high step-up boost converter is presented. With a unique X-type Z-source network, clamping voltage of pump capacitor is improved. The proposed converter achieves a high voltage gain without an extremely switch duty cycle...
This paper propose a fast transient buck converter using hysteresis PWM control, which is based on output ripple voltage and inductor ripple current for charging and discharging characteristics of capacitor C. The proposed control strategy is very simple and solves the compensation problem of the error amplifier in conventional voltage PWM control. It achieves both faster transient response and quasi...
A hysteresis control strategy based on the modulation of output voltage for Buck converter is proposed in this paper, which offers faster transient response and better stability. The small signal is derived, dynamic analysis and evaluation of control strategy is performed and verified by simulation and experiment results.
This paper presents a new adaptive hysteresis band control (AHBC) technique for hysteresis DC-DC buck converter, which can adaptively adjust the hysteresis band according to input and output voltages. This technique was designed by PSIM. Simulation results show that the proposed AHBC has lower output ripple than the constant hysteresis window technique when output capacitance reduces. Although the...
To improve the behaviors of DC-DC converters, a hysteresis control strategy with inductor current feedback is put forward. The output voltage, output of hysteresis comparator and inductor current are messured to control the capacitor voltage, the value of the capacitor voltage and the hysteresis band width are calculated, and the capacitor voltage is controlled to a narrow range around the hysteresis...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.