Application of State Estimation in Distribution Systems with Embedded Microgrids
In this paper, a weighted least square (WLS) state estimation algorithm with equality constraints is proposed for smart distribution networks embedded with microgrids. Since only a limited number of real-time measurements are available at the primary or secondary substations and distributed generati...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/14/23/7933 |
| _version_ | 1827675006327324672 |
|---|---|
| author | Nikolaos M. Manousakis George N. Korres |
| author_facet | Nikolaos M. Manousakis George N. Korres |
| author_sort | Nikolaos M. Manousakis |
| collection | DOAJ |
| description | In this paper, a weighted least square (WLS) state estimation algorithm with equality constraints is proposed for smart distribution networks embedded with microgrids. Since only a limited number of real-time measurements are available at the primary or secondary substations and distributed generation sites, load estimates at unmeasured buses remote from the substations are needed to execute state estimation. The load information can be obtained by forecasted and historical data or smart real-time meters. The proposed algorithms can be applied in either grid-connected or islanded operation mode and can efficiently identify breaker status errors at the main substations and feeders, where sufficient measurement redundancy exists. The impact of the accuracy of real and pseudo-measurements on the estimated bus voltages is tested with a 55-bus distribution network including distributed generation. |
| first_indexed | 2024-03-10T04:54:11Z |
| format | Article |
| id | doaj.art-45963d1da53d4921acc7ec5b7a19035a |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T04:54:11Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-45963d1da53d4921acc7ec5b7a19035a2023-11-23T02:20:05ZengMDPI AGEnergies1996-10732021-11-011423793310.3390/en14237933Application of State Estimation in Distribution Systems with Embedded MicrogridsNikolaos M. Manousakis0George N. Korres1Department of Electrical & Electronics Engineering, University of West Attica, 12244 Athens, GreeceSchool of Electrical & Computer Engineering, National Technical University of Athens, 15780 Athens, GreeceIn this paper, a weighted least square (WLS) state estimation algorithm with equality constraints is proposed for smart distribution networks embedded with microgrids. Since only a limited number of real-time measurements are available at the primary or secondary substations and distributed generation sites, load estimates at unmeasured buses remote from the substations are needed to execute state estimation. The load information can be obtained by forecasted and historical data or smart real-time meters. The proposed algorithms can be applied in either grid-connected or islanded operation mode and can efficiently identify breaker status errors at the main substations and feeders, where sufficient measurement redundancy exists. The impact of the accuracy of real and pseudo-measurements on the estimated bus voltages is tested with a 55-bus distribution network including distributed generation.https://www.mdpi.com/1996-1073/14/23/7933distribution systemload estimatemicrogridnetwork splitting problemnetwork topologystate estimation |
| spellingShingle | Nikolaos M. Manousakis George N. Korres Application of State Estimation in Distribution Systems with Embedded Microgrids Energies distribution system load estimate microgrid network splitting problem network topology state estimation |
| title | Application of State Estimation in Distribution Systems with Embedded Microgrids |
| title_full | Application of State Estimation in Distribution Systems with Embedded Microgrids |
| title_fullStr | Application of State Estimation in Distribution Systems with Embedded Microgrids |
| title_full_unstemmed | Application of State Estimation in Distribution Systems with Embedded Microgrids |
| title_short | Application of State Estimation in Distribution Systems with Embedded Microgrids |
| title_sort | application of state estimation in distribution systems with embedded microgrids |
| topic | distribution system load estimate microgrid network splitting problem network topology state estimation |
| url | https://www.mdpi.com/1996-1073/14/23/7933 |
| work_keys_str_mv | AT nikolaosmmanousakis applicationofstateestimationindistributionsystemswithembeddedmicrogrids AT georgenkorres applicationofstateestimationindistributionsystemswithembeddedmicrogrids |