Doctoral Dissertations


Zhiping Yang


"This dissertation, consisting of five papers, presents the results of research on the incorporation of battery energy storage into a Static Synchronous Compensator (StatCom). The main contribution of this body of work is the establishment of the modeling and control of the StatCom/BESS in power system dynamic applications. The first paper is focused on the steady state characteristics of the StatCom and StatCom/BESS. The characteristic curves of output voltage and output power were proposed and used in comparing the functionality of the StatCom and StatCom/BESS. In the second paper, a StatCom model was proposed and used in power flow analysis. The main advantage of new proposed StatCom model is that the StatCom switching losses and high frequency losses are considered and well represented using an equivalent resistor. This new model can be easily implemented in the traditional power flow program. The accuracy of the new model is verified by a detailed steady state simulation and dynamic simulation. The third paper introduced an integrated StatCom/BESS for the improvement of dynamic and transient stability and transmission capability. This paper compares the performance of different FACTS/BESS combinations and provides experimental verification of the proposed controls on a scaled StatCom/BESS system. In the fourth paper, the conventional Pl control for StatCom is compared and contrasted with various feedback control strategies. A linear optimal control based LQR control is shown to be superior in terms of response profile and control effort required. The fifth paper presents the Load Increase Index which is a new computationally efficient loadability index derived from the continuation power flow method. The proposed index is a by-product of the continuation power flow, and may be obtained with little extra computational effort, while yielding considerable information about the distance to the critical loading point. The mathematical relationship of the proposed index to two other commonly used voltage stability indices: the smallest singular value of the loadflow Jacobian and the determinant of the loadflow Jacobian are also presented in this paper"--Abstract, page iv.


Crow, Mariesa

Committee Member(s)

Stanek, Keith
Pekarek, Steven
Drewniak, James L.
Pottinger, Hardy J., 1944-


Electrical and Computer Engineering

Degree Name

Ph. D. in Electrical Engineering


Sandia Laboratories
University of Missouri--Rolla. Intelligent Systems Center
University of Missouri--Rolla. School of Engineering Dean's Fellowship
University of Missouri--Rolla. Department of Electrical and Computer Engineering


Electronic access to the full-text of this document is restricted to Missouri S&T users. Print thesis not available at Missouri S&T Library.

Print thesis lost & withdrawn; scan made from microfilm is best quality available.

Research Center/Lab(s)

Intelligent Systems Center


University of Missouri--Rolla

Publication Date


Journal article titles appearing in thesis/dissertation

  • The steady state characteristics of a StatCom with energy storage
  • An improved model of StatCom for load flow analysis
  • Integration of a StatCom and battery energy storage
  • StatCom control for power system voltage control applications
  • A new computationally efficient index for loadability limit studies


xii, 63 pages

Note about bibliography

Includes bibliographical references.


© 2000 Zhiping Yang, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type




Subject Headings

Energy storage
Storage batteries
Flexible AC transmission systems

Thesis Number

T 7780

Print OCLC #


Electronic OCLC #


Share My Dissertation If you are the author of this work and would like to grant permission to make it openly accessible to all, please click the button above.