Then a new device which is named Inter-line Dynamic Voltage Restorer (IDVR) is discussed. This device consists of two conventional DVRs which are installed. An interline dynamic voltage restorer (IDVR) is a novel c o m p e n s a t i o n piece of mitigation It is made of several dynamic voltage restorers (DVRs) with a. Index Terms—Dynamic voltage restorer, Interline dynamic voltage restorer, Current source inverter, SMES and Power quality.
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It also increases compensation time by operating in minimum active power mode through a controlled transition once the phase jump is compensated. Per-phase simulation results for voltagee sag condition at: Further extension in compensation time can be achieved for intermediate sag depths.
For normal voltage levels, the DVRs should be bypassed. It is clear from both the simulation and experimental results illustrated in this paper that the proposed zero-real power tracking technique applied to DVR-based compensation can result in superior performance compared to the traditional in-phase technique.
To illustrate the effectiveness of the proposed method an analytical comparison is carried out with the existing dyanmic jump compensation schemes. Computer planning and simulation of power systems require system components to be represented mathematically. The experimental results demonstrate the feasibility of the proposed phase jump compensation method for practical applications.
Both the magnitude and phase displacement angle of the synthesized DVR voltage are precisely adjusted to achieve lower power utilization. The overall three-phase voltage signals during in-phase compensation simulation.
Interline dynamic voltage restorer (IDVR) Archives – ASOKA TECHNOLOGIES
This technical merit demonstrates that DVRs could cover a wider range of voltage sags; the practicality of this idea for better utilization is better than that of existing installed DVRs. The DF of the sourcing feeder increases while the DF of the receiving feeder decreases.
The experimental test results match those proposed using simulation, although some discrepancies due to the imperfect nature of the test circuit components were seen. An IDVR merely consists of several dynamic voltage restorers DVRs sharing a common dc link connecting independent feeders to secure electric power to critical loads.
Journal of Engineering Research and Technology
DF improvement can be achieved via active and reactive power exchange PQ sharing between different feeders. In this paper, a new configuration has been proposed which not only improves the compensation capacity of the IDVR at high power factors, but also increases the performance of the compensator to mitigate deep sags at fairly moderate power factors. During sag period, active power can be transferred from a feeder to another one and voltage sags with long durations can be mitigated.
This paper proposes a new operational mode interilne the IDVR to improve the DF of different feeders under normal operation. Investigating the IDVR performance when the proposed method is applied for a sag with depth of 0.
Mathematical analysis is carried out for each individual component of the IDVR as modular models, which are then aggregated to generate the final model. Instead of bypassing the DVRs in normal conditions, this paper proposes operating the DVRs, if needed, to improve the displacement factor DF of one of the involved feeders.
These advantages were achieved by decreasing the load power factor during sag condition. In this case, the DF of the sourcing feeder will have a notable improvement with only a slight variation in DF of the receiving feeder. The main conclusions of this work can be summarized as follows:. With the traditional in-phase technique, the compensation was performed and depended on the real power injected to the system. IDVR compensation capacity, however, depends greatly on the load power factor and a higher load power factor causes lower performance of IDVR.
When the compensation was conducted using the proposed technique, less energy was used for the converter basic switching process. These operational constraints have been identified and considered.
Simulation and experimental results elucidate and substantiate the proposed concept. The real and reactive powers are calculated in real time in the tracking loop to achieve better conditions.
This study aims to enhance the abilities of DVRs to maintain acceptable voltages and last longer during compensation. Then, experimental results on a scaled-down IDVR are presented to confirm the theoretical and simulation results. The existing control strategies either mitigate the phase jump or improve the utilization of dc link energy by i reducing the amplitude of injected voltage, or ii optimizing the dc bus energy support. The main conclusions of this work can be summarized as follows: The higher active power requirement associated with voltage phase jump compensation has caused a substantial rise in size and cost of dc link energy storage interlinw of DVR.
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In this paper an enhanced sag compensation scheme is proposed for capacitor supported DVR. Electronics Nuclear engineering, Electrical and Electronic Engineering. Per-phase PQ sharing mode simulation results: In this technique, the source voltages are sensed continuously and when the voltage sag is detected, the shunt reactances are switched into the circuit and decrease the load power factors to improve IDVR performance.
This paper presents a utilization technique for enhancing the capabilities of dynamic voltage restorers DVRs. The proposed strategy improves the voltage quality of sensitive loads by protecting them against the grid voltage sags involving the phase jump.
The results from both the simulation and experimental tests illustrate that the proposed technique clearly achieved superior performance. This technique results in less energy being taken out of the DC-link capacitor, resulting in smaller size requirements.
The proposed technique has the advantage of simplifying the modelling of any flexible AC transmission system FACTS device in dynamic phasor mode when compared to other modelling techniques reported in the literature.
A method for building a dynamic phasor model of an Interline Dynamic Voltage Restorer IDVR is dyynamic, and the resulting model is tested in a simple radial distribution system.
Winter Meetingvol. To successfully apply this concept, several constraints are addressed throughout the paper.
Strathprints home Open Access Login. This enhancement can also be seen as a considerable reduction in dc link capacitor size for new installation. An interline dynamic voltage restorer IDVR is a new device for sag mitigation which is made of several dynamic voltage restorers DVRs with a common DC link, where each DVR is connected in series with intelrine distribution feeder.