An Efficient Method for Sizing and Allocation of Distributed Generation and Voltage Regulators in a Distribution Network

An Efficient Method for Sizing and Allocation of Distributed Generation and Voltage Regulators in a Distribution Network

Saeedeh Ketabipour  Shahrokh Shojaeian

Department of Engineering, Islamic Azad University, Khomeinishahr Branch, Isfahan 84175-119, Iran

Corresponding Author Email:
27 May 2018
| |
30 June 2018
| | Citation



One of the well-known challenges in designing long distribution lines is to determine the efficient locations of voltage drop compensating devices e.g. Voltage Regulators (VRs) and Distributed Generations (DGs). Determination of optimal locations, results in more economical benefit of these equipments. The majority of the works presented in the literature try to satisfy this goal, using classical load flow methods, such as Newton-Raphson approach or the back-forward method. However, these classical methods may suffer from some serious deficiencies. Namely, the first method is faced to the risk of divergence in distribution systems and the second is time consuming. Moreover, both methods impose quite significant complexity. The method presented in this paper employs a load distribution technique in addition to the genetic algorithm solution, enabling the investigation of simultaneous effects of the distributed generation and voltage regulator on a distribution feeder. In the proposed algorithm, an objective function composed of power losses and voltage deviations is used to obtain an optimal location of the above mentioned equipments (DGs and VRs) and the efficient size of the distributed generation system. The proposed idea has been examined for the IEEE 33-Bus test system and its favorable efficiency is confirmed.


distribution network, voltage regulator, genetic algorithm, voltage drop, distributed generation

1. Introduction
2. Distributed Generation
3. Voltage Regulator
4. The Proposed Method
5. Simulation Study
6. Conclusion

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