Coordinated Voltage Control of Active Distribution Network

Jiang Xie,Shuya Niu,Xu Han,Huiting Xu,Wenxia Liu

doi:10.1051/matecconf/20165501002

Abstract

This paper presents a centralized coordinated voltage control method for active distribution network to solve off-limit problem of voltage after incorporation of distributed generation (DG). The proposed method consists of two parts, it coordinated primal-dual interior point method-based voltage regulation schemes of DG reactive powers and capacitors with centralized on-load tap changer (OLTC) controlling method which utilizes system’s maximum and minimum voltages, to improve the qualified rate of voltage and reduce the operation numbers of OLTC. The proposed coordination has considered the cost of capacitors. The method is tested using a radial edited IEEE-33 nodes distribution network which is modelled using MATLAB.

Highlights

Large-scale development of distributed generation (DG), will bring problem to traditional distribution network such as bidirectional power flow and voltage off-limit
The proposed method consists of two parts: primal-dual interior point method-based voltage regulation schemes of DG reactive powers and capacitors, centralized on-load tap changer (OLTC) controlling method which utilizes the system’s maximum and minimum voltages proposed in [5]
4 solar-based DGs are connected at different positions

Summary

Introduction

Large-scale development of DG, will bring problem to traditional distribution network such as bidirectional power flow and voltage off-limit. In [3], the author proposed a simple automatic voltage control method, which controls local reactive power output of DG, reducing active power output of DG as well. A centralized coordinated voltage method has been proposed including coordination between primal-dual interior point method-based voltage regulation schemes of DG reactive powers and capacitors, and centralized on-load tap changer (OLTC) controlling method which utilizes the system’s maximum and minimum voltages, to ensure a stable and economical distribution network voltage. The proposed method consists of two parts: primal-dual interior point method-based voltage regulation schemes of DG reactive powers and capacitors, centralized on-load tap changer (OLTC) controlling method which utilizes the system’s maximum and minimum voltages proposed in [5]

V system min

Algorithm

Simulation result

Conclusion