External electric grid impact on mode parameters at a load node

Abstract

Relevance. A passive experiment is one of the advanced techniques for a static load voltage characteristic identification. External electric grid impact on mode parameters at a load node – a grid response – sophisticates the statistical processing of passive experiment results significantly. For this reason, the analysis of a grid response impact and detection of its reduction are relevant problems. Aim. Quantitative evaluation of a grid response impact is produced by grid response active and reactive power coefficients; therefore the aim of this paper is to analyze the variance of grid response coefficients in relation on scheme and mode parameters. This allows finding techniques of reducing a grid response impact. Methods. Transformations of the Jacobi matrix, when scheme and mode parameters are formed as complex numbers. Results. The authors have proposed the analytic expressions, reproducing dependences of grid response coefficients on scheme and mode parameters in general variants. Conclusions. Based on the analytic and schematic dependencies the authors determined the measures for reducing a grid response impact. It is demonstrated that with increase in the impedance among power and load nodes, a grid response impact grows as well by active and reactive power. The authors proposed the practical technique for calculating a grid response impact. The perspective trends for improving accuracy in identifying a grid response impact using current mode and scheme parameters are defined.

Keywords

• static load voltage characteristics
• passive experiment
• grid response coefficients
• inverse Jacobi matrix
• mode and scheme parameters