The Definition of Power Grid Strength and Its Calculation Methods for Power Systems with High Proportion Nonsynchronous-Machine Sources-Reference-Cited by-同舟云学术

The Definition of Power Grid Strength and Its Calculation Methods for Power Systems with High Proportion Nonsynchronous-Machine Sources

Published:2023-02-13 Issue:4 Volume:16 Page:1842
ISSN:1996-1073
Container-title:Energies
language:en
Short-container-title:Energies

Author:

Xu Zheng¹^ORCID,Zhang Nan¹^ORCID,Zhang Zheren¹,Huang Ying¹

Affiliation:

1. Department of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

Abstract

This paper studies the definition and calculation method of power grid strength in the environment of high-proportion nonsynchronous-machine sources, focusing on the effect of nonsynchronous-machine sources on voltage support strength and frequency support strength. By dividing the nonsynchronous-machine sources into four types, the equivalent circuits of each type under normal state and fault state are derived, respectively. Based on the Thevenin equivalent impedance of the power grid and the equivalent impedance of the connected device, the definition and calculation method of voltage support strength is given, and the new meaning of single-infeed short-circuit ratio and multi-infeed short-circuit ratio in the context of high proportion nonsynchronous-machine sources is presented. Based on the initial frequency change rate and the steady-state frequency deviation of any node in the power grid under the maximum expected active power disturbance, the equivalent inertia lifting factor and steady-state frequency deviation decreasing factor are defined, respectively, to describe the contribution of nonsynchronous-machine sources to the power grid frequency support strength, and the calculation methods of the equivalent inertia lifting factor and the steady-state frequency deviation decreasing factor are given.

Publisher

MDPI AG

Subject

Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction

Link

https://www.mdpi.com/1996-1073/16/4/1842/pdf

Reference72 articles.

1. Anderson, P., and Fouad, A. (2003). Power System Control and Stability, IEEE Press. [2nd ed.].

2. Kundur, P.S. (1994). Power System Stability and Control, McGraw-Hill.

3. Machowski, J., Blalek, J., and Bumby, J. (2008). Power System Dynamics-Stability and Control, John Wiley & Sons Ltd.

4. CIGRE Working Group 14.07, and IEEE Working Group 15.05.05 (1992). Guide for Planning DC Links Terminating at AC Locations Having Low Short-Circuit Capacities-Part I: AC/DC Interaction Phenomena, CIGRE Brochure.

5. CIGRE Working Group 14.07, and IEEE Working Group 15.05.05 (1997). Guide for Planning DC Links Terminating at AC Locations Having Low Short-Circuit Capacities-Part II: Planning Guidelines, CIGRE Brochure.