# Method and system to estimate variables in an integrated gasification combined cycle (IGCC) plant

## Abstract

System and method to estimate variables in an integrated gasification combined cycle (IGCC) plant are provided. The system includes a sensor suite to measure respective plant input and output variables. An extended Kalman filter (EKF) receives sensed plant input variables and includes a dynamic model to generate a plurality of plant state estimates and a covariance matrix for the state estimates. A preemptive-constraining processor is configured to preemptively constrain the state estimates and covariance matrix to be free of constraint violations. A measurement-correction processor may be configured to correct constrained state estimates and a constrained covariance matrix based on processing of sensed plant output variables. The measurement-correction processor is coupled to update the dynamic model with corrected state estimates and a corrected covariance matrix. The updated dynamic model may be configured to estimate values for at least one plant variable not originally sensed by the sensor suite.

- Inventors:

- Issue Date:

- Research Org.:
- General Electric Company (Niskayuna, NY)

- Sponsoring Org.:
- USDOE

- OSTI Identifier:
- 1093373

- Patent Number(s):
- 8,538,561

- Application Number:
- 13/053,690

- Assignee:
- General Electric Company (Niskayuna, NY)

- DOE Contract Number:
- FC26-07NT43094

- Resource Type:
- Patent

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 47 OTHER INSTRUMENTATION

### Citation Formats

```
Kumar, Aditya, Shi, Ruijie, and Dokucu, Mustafa.
```*Method and system to estimate variables in an integrated gasification combined cycle (IGCC) plant*. United States: N. p., 2013.
Web.

```
Kumar, Aditya, Shi, Ruijie, & Dokucu, Mustafa.
```*Method and system to estimate variables in an integrated gasification combined cycle (IGCC) plant*. United States.

```
Kumar, Aditya, Shi, Ruijie, and Dokucu, Mustafa. Tue .
"Method and system to estimate variables in an integrated gasification combined cycle (IGCC) plant". United States. https://www.osti.gov/servlets/purl/1093373.
```

```
@article{osti_1093373,
```

title = {Method and system to estimate variables in an integrated gasification combined cycle (IGCC) plant},

author = {Kumar, Aditya and Shi, Ruijie and Dokucu, Mustafa},

abstractNote = {System and method to estimate variables in an integrated gasification combined cycle (IGCC) plant are provided. The system includes a sensor suite to measure respective plant input and output variables. An extended Kalman filter (EKF) receives sensed plant input variables and includes a dynamic model to generate a plurality of plant state estimates and a covariance matrix for the state estimates. A preemptive-constraining processor is configured to preemptively constrain the state estimates and covariance matrix to be free of constraint violations. A measurement-correction processor may be configured to correct constrained state estimates and a constrained covariance matrix based on processing of sensed plant output variables. The measurement-correction processor is coupled to update the dynamic model with corrected state estimates and a corrected covariance matrix. The updated dynamic model may be configured to estimate values for at least one plant variable not originally sensed by the sensor suite.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {2013},

month = {9}

}