Dynamic VAR Planning in HVDC Receiving-End Power Grid Considering Short-Term Voltage Stability

The short-term voltage stability (STVS) in HVDC receiving-end power grid is weak, and the dynamic VARs are required to be installed. Therefore, the issue of dynamic VAR planning is worth to be studied. In this paper, a method for dynamic VAR planning based on the method of approximate programming (MAP) is proposed. Firstly, a brief introduction of the MAP is presented. Then, the dynamic VAR planning problem is constructed, a short-term voltage stability (STVS) index is proposed, the optimization problem is linearized and the procedure of the proposed method is presented. Lastly, a case study on a modified IEEE 39 system is presented. The method proposed in this paper is simple in form and easy to solve, which has potential for practical applications.

I. Introduction

Currently, several HVDC transmission projects are in operation around the world [1], so as to transmit massive electrical power over long distance. The regional power grid at the HVDC inverter side is often known as receiving-end power grid. The voltage stability is weak in receiving-end power grid, since the converter station consumes huge amount of reactive power and lack of dynamic VARs.