Latin Hypercube Sampling Method for Location Selection of Multi-Infeed HVDC System Terminal

Xiangqi Li,Yunfeng Li,Weiyu Wang,Yijia Cao,Li Liu,Yong Li

doi:10.3390/en13071646

Abstract

Owing to the stochastic states of power systems with large-scale renewable generation, the impact of high-voltage direct current (HVDC) systems on the stability of the power system should be examined in a probabilistic manner. A probabilistic small signal stability assessment methodology to select the best locations for multi-infeed high-voltage direct current systems in alternating current (AC) grids is proposed in this paper. The Latin hypercube sampling-based Monte Carlo simulation approach is taken to generate the stochastic operation scenarios of power systems with the consideration of several stochastic factors, i.e., load demand and power generation. The damping ratio of the critical oscillation modes and the controllability of power injection to oscillation modes are analyzed by the probabilistic small signal stability. A probabilistic index is proposed to select the best locations of high-voltage direct current systems for improving the damping of the oscillation modes. The proposed methodology is applied to an IEEE 39 bus system considering the stochastic load demand and power generation. The results of probabilistic small signal stability assessment and a time-domain simulation show that the installation of a high-voltage direct current system on the selected locations can effectively improve the system damping.

Highlights

With the progress of power systems, especially the extension of large-scale interconnected power systems, the inter-area oscillation issue is becoming a major problem
This paper proposes a probabilistic small signal stability analysis (PSSSA) methodology to evaluate the best location for multi-infeed high-voltage direct current (HVDC) systems
The heavy computation burden of the traditional Monte Carlo (MC) method is significantly decreased by the Latin hypercube sampling (LHS) technique

Summary

Introduction

With the progress of power systems, especially the extension of large-scale interconnected power systems, the inter-area oscillation issue is becoming a major problem. The weak connection between subsystems may cause oscillation issues of the interconnected power system, during the initial period of the interconnected power system. High-voltage direct current (HVDC) transmission systems are a promising method to enhance the connection of the interconnected power systems. The integration of HVDC systems makes the structure of the receiving-side power systems more complex. The large-scale renewable generation can be integrated by HVDC systems, which increases the uncertainties of the system operation states.

Methods

Discussion

Conclusion