# Stability analysis of large electric power systems

## Abstract

Modern electric power systems are large and complicated, and, in many regions of the world, the generation and transmission systems are operating near their limits. Ensuring the reliable operation of the power system requires engineers to study the response of the system to various disturbances. The responses to large disturbances are examined by numerically solving the nonlinear differential-algebraic equations describing the power system. The response to small disturbances is typically studied via eigenanalysis. The Electric Power Research Institute (EPRI) recently developed the Extended Transient/Mid-term Stability Program (ETMSP) to study large disturbance stability and the Small Signal Stability Program Package (SSSP) to study small signal stability. The primary objectives of the work described in this report were to (1) explore ways of speeding up ETMSP, especially on mid-term voltage stability problems, (2) explore ways of speeding up the Multi-Area Small-Signal Stability program (MASS), one of the codes in SSSP, and (3) explore ways of increasing the size of problem that can be solved by the Cray version of MASS.

- Authors:

- Publication Date:

- Research Org.:
- Pacific Northwest Lab., Richland, WA (United States)

- Sponsoring Org.:
- USDOE, Washington, DC (United States)

- OSTI Identifier:
- 10127614

- Report Number(s):
- PNL-8495

ON: DE93007463

- DOE Contract Number:
- AC06-76RL01830

- Resource Type:
- Technical Report

- Resource Relation:
- Other Information: PBD: Jan 1993

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 42 ENGINEERING; POWER SYSTEMS; STABILITY; SYSTEMS ANALYSIS; ELECTRIC UTILITIES; TRANSIENTS; DIFFERENTIAL EQUATIONS; EVALUATION; ALGORITHMS; SUPERCOMPUTERS; 420200; FACILITIES, EQUIPMENT, AND TECHNIQUES

### Citation Formats

```
Elwood, D.M.
```*Stability analysis of large electric power systems*. United States: N. p., 1993.
Web. doi:10.2172/10127614.

```
Elwood, D.M.
```*Stability analysis of large electric power systems*. United States. doi:10.2172/10127614.

```
Elwood, D.M. Fri .
"Stability analysis of large electric power systems". United States.
doi:10.2172/10127614. https://www.osti.gov/servlets/purl/10127614.
```

```
@article{osti_10127614,
```

title = {Stability analysis of large electric power systems},

author = {Elwood, D.M.},

abstractNote = {Modern electric power systems are large and complicated, and, in many regions of the world, the generation and transmission systems are operating near their limits. Ensuring the reliable operation of the power system requires engineers to study the response of the system to various disturbances. The responses to large disturbances are examined by numerically solving the nonlinear differential-algebraic equations describing the power system. The response to small disturbances is typically studied via eigenanalysis. The Electric Power Research Institute (EPRI) recently developed the Extended Transient/Mid-term Stability Program (ETMSP) to study large disturbance stability and the Small Signal Stability Program Package (SSSP) to study small signal stability. The primary objectives of the work described in this report were to (1) explore ways of speeding up ETMSP, especially on mid-term voltage stability problems, (2) explore ways of speeding up the Multi-Area Small-Signal Stability program (MASS), one of the codes in SSSP, and (3) explore ways of increasing the size of problem that can be solved by the Cray version of MASS.},

doi = {10.2172/10127614},

journal = {},

number = ,

volume = ,

place = {United States},

year = {Fri Jan 01 00:00:00 EST 1993},

month = {Fri Jan 01 00:00:00 EST 1993}

}