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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For normal voltage levels, the DVRs should be bypassed. Intreline this mode, theDFof one of the feeders is improved via active and reactive power exchange PQ sharing between feeders through the common dc link. The results from both the simulation and experimental tests illustrate that the proposed technique clearly achieved superior performance. These advantages were achieved by decreasing the load interlinw factor during sag condition.
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 a distribution feeder. The ensure compatibility with transient stability programs, the analysis is performed for the fundamental frequency only, with other frequency components being truncated and without considering harmonics. The compensation was eventually forced to stop before the entire voltage sag period was finished.
The proposed concept has been supported with simulation and experimental results. 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.
In this paper, an enhanced sag compensation strategy is proposed that mitigates the phase jump in the load voltage while improving the overall sag compensation time.
While one of the DVRs compensates for the local voltage sag in its feeder, the other DVRs replenish the common interlinw voltage. IDVR compensation capacity, however, depends greatly on the load power factor and a higher load power factor causes lower performance of IDVR. Strathprints home Open Access Login.
Then, more of the energy stored in the DC-link capacitor was utilized quickly, reaching its limitation within a shorter period. 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.
This technique results in less energy being taken out of the DC-link capacitor, resulting in smaller size requirements. Finally, the simulation and practical results on the CHB based IDVR confirmed the effectiveness of the proposed configuration and control scheme.
With the traditional in-phase technique, the compensation was performed and depended on the real power injected to the system. 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. This paper presents a utilization technique for enhancing the capabilities of dynamic voltage restorers DVRs.
Interline dynamic voltage restorer (IDVR) Archives – ASOKA TECHNOLOGIES
It also increases compensation time by operating in minimum active power mode through a controlled transition once the phase jump is compensated. 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 system of DVR. 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 main conclusions of this work can be summarized as follows: To illustrate the effectiveness of the proposed method an analytical comparison is carried out with the existing phase jump compensation schemes.
These operational constraints have been identified and considered. This paper proposes a new operational mode for the IDVR to improve the DF of different feeders under normal operation.
The main conclusions of this work can be summarized as follows:. When the restoer was conducted using the proposed technique, less energy was used for the converter basic switching process.
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. During sag period, active power can be transferred from a feeder to another one and voltage sags with long durations can be mitigated. Simulation and experimental results elucidate and substantiate the proposed concept.
Journal of Engineering Research and Technology
To successfully apply this concept, several constraints are addressed throughout the paper. This study aims to enhance the abilities of DVRs to maintain acceptable voltages and last longer during compensation.
The proposed strategy improves the voltage quality of sensitive loads by protecting them against inteerline grid voltage sags involving the phase jump.