View of DESIGN OF UNIFIED VAR CONTROLLER FOR VOLTAGE REGULATION & ISLANDING DETECTION IN DISTRIBUTED PHOTO VOLTAIC GENERATION SYSTEM

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Vol.03, Issue 05, May 2018, Available Online:www.ajeee.co.in/index.php/AJEEE

DESIGN OF UNIFIED VAR CONTROLLER FOR VOLTAGE REGULATION &

ISLANDING DETECTION IN DISTRIBUTED PHOTO VOLTAIC GENERATION SYSTEM

ABHISHEK RAI¹

1PG Scholar, Department Of Electrical Engg, SRIT Jabalpur (M.P) PROF NISHEET SONI²

2Assistant Prof, Department Of Electrical Engg, SRIT Jabalpur (M.P)

Abstract:- This paper proposes a standalone standardized var driver for solving system voltage problems and involuntary landing problems associated with distributed PV (PV) generation systems. The proposed controller explains the integration of voltage regulation (VR) and island detection (ID) functions in a photovoltaic inverter based on reactive power control.

Compared to the individual VR or ID methods, the integration of functions has lot of advantages in high-penetration PV applications:

1. Fast VR thanks to autonomous control;

2. Wide system reliability thanks to the ability to distinguish between temporary network disturbances and island events;

3. Negligible detection area (NDZ) and no negative impact on the quality of the system power per ID; and

4. No interference between multiple photovoltaic systems during identification.

Because the VR and ID functions are integrated into a controller, the controller is designed to meet the dynamic RV performance requirements and ensure a small NDZ ID simultaneously. The interaction between multiple photovoltaic systems during virtual reality is also considered in the design procedure. At last, the validity of the proposed controller and the controller design method are validated with the simulation using a real- time digital simulator and a test bench of the power hardware in the circuit.

INTRODUCTION

The increased penetration of the supplied photovoltaic structures introduces new integration problems compared to the safe operation of the distribution systems [1], [2]. the upward impulse of the voltage due to the slippage of the opposite electricity and the voltage fluctuations associated with the irradiation version were predicted by the observations of the area and research results [3] - [5]. The false feasible triggering of Pv structures dispensed by the mass as a result of voltage / frequency adjustments clamped against the island may wish to produce an unacceptably low voltage [1]. These problems put more pressure on the software voltage law devices (VR) and motivate them even to malfunctions.

Therefore, it is very important to study effective techniques to mitigate the effect of distributed pv structures in the power supply tension profiles.actively containing the photovoltaic systems delivered in the vr feeder is one of the promising responses to capacity voltage problems [6] - [10]. in fact, they could help and coordinate with the vr devices of the low speed application to form a two

layer vr system (low and excessive passage) [1]. The vr methods based on today's inverter include power reduction [3], [7], volt / var memory control [7], [8]

and total management based on verbal exchange [9], [10]. in order to activate network disturbances, it is recommended to configure the disconnection of the voltage / frequency of free trip [11], however, it increases the possibility of failure of island detection (identity).

Therefore, it is essential to increase the ID algorithms. more sensitive energy to travel through voltage disruption without increasing the quarter of non-island detection (ndz) [12].

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Paper Id /Ajeee-1301

Fig. 1. a configuration of the proposed hybrid era system

GRID-CONNECTED WIND GENERATION SYSTEM

Grid-related wind power generation is showing the highest price of growth of any shape of strength technology, reaching global annual growth costs in the order of 20 - 25%. It’s far doubtful whether or not some other strength generation is developing, or has grown, at such a fee.

Worldwide established ability become forty seven.6 gw within the year 2004 and 58.9 gw in 2005 [1], [2]. Wind energy is an increasing number of being regarded as a mainstream power deliver generation. its appeal as an energy supply source has fostered formidable targets for wind energy in many countries round the arena.

PROBLEM FORMULATION

There are some unique electricity quit use functions of wind electricity systems

i. Most wind power sites are in remote rural, island or marine regions. strength necessities in such locations are one-of-a-kind and do not require the high electrical energy.

ii. A electricity machine with mixed pleasant supplies may be a terrific in shape with general power end use i.e. the deliverof reasonably- priced variable voltage electricity for heating and highly-priced constant voltage electricity for lights and vehicles.

iii. Rural grid structures are probably to be susceptible (low voltage 33 kv). interfacing a wind electricity conversion device (wecs) in weak

grids is difficult and negative to the employees’ safety.

iv. There are always durations with out wind. As a consequence, wecs should be related strength garage or parallel generating device if materials are to be maintained.

PROPOSED HYBRID GENERATION SYSTEM

System Configuration

The planned gadget consists of a hybrid pv / battery device with the main network connected to non-linear loads and unbalanced in% as shown in fig. 1. the photovoltaic system is modeled as non- linear voltage resources [8]. the matrix pv is connected to the hcicb dc-dc converter and the bidirectional battery converter is shown in fig. 1, which could be coupled in the dc aspect of a μg-vsc. the hcicbdcdc converter is connected to the pv matrix works as the mppt controller and the battery converter is used to adjust the fluctuation of the force between DC and AC of the gadget.

Fig. 2. A block diagram of the proposed hybrid era system

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Fig. 4. an interface window of the hybrid system control software program The photovoltaic device includes a 9kw photovoltaic array and a 10kw improvement DC / DC converter that increases the array voltage to a better level of common DC voltage. The pv machine operates under the control of tracking the maximum energy factor (mppt) to create the maximum power of the solar irradiation version. The wind device consists of an 11kva induction generator based entirely on a wind turbine simulator and a variable frequency drive of 20kva at variable frequency whose operating scheme is to exploit the maximum electricity of various wind speeds with the help of wind speed.

Figure four is a hybrid system controller software interface window. The configuration of the operating and control system can be obtained with this software interface.

RESULT

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Paper Id /Ajeee-1301

CONCLUSION

Theoretical analysis has found that the IDV functions can be incorporated into a PV inverter by manipulating real / reactive energy. The unified unified controller, composed of the voltage controller and the adaptive voltage reference generator, has been presented to acquire the integration of the functions autonomously. With the proposed controller implemented within distributed photovoltaic systems, the problems of tension in the skills system can be mitigated and the false triggering of photovoltaic systems can be avoided. The

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Vol.03, Issue 05, May 2018, Available Online:www.ajeee.co.in/index.php/AJEEE feasibility and benefits of the proposed

driver have been tested on rtds and phil test bank. The voltage controller provisioning criterion was provided by studying the vr dynamic constraints based entirely on an unmarried pv device model. the evaluation showed that the disposition criterion is applicable in more than one state of affairs, which has been modified to confirm through simulation / test effects. Several design issues were also mentioned for ivc and avc.

REFERENCES

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