Dynamic Stability Performance of Autonomous Microgrid Involving High Penetration Level of Constant Power Loads
Nowadays, behaving as constant power loads (CPLs), rectifiers and voltage regulators are extensively used in microgrids (MGs). The MG dynamic behavior challenges both stability and control effectiveness in the presence of CPLs. CPLs characteristics such as negative incremental resistance, synchroniz...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Mathematics |
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| Online Access: | https://www.mdpi.com/2227-7390/9/9/922 |
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| author | Mohamed A. Hassan Muhammed Y. Worku Abdelfattah A. Eladl Mohammed A. Abido |
| author_facet | Mohamed A. Hassan Muhammed Y. Worku Abdelfattah A. Eladl Mohammed A. Abido |
| author_sort | Mohamed A. Hassan |
| collection | DOAJ |
| description | Nowadays, behaving as constant power loads (CPLs), rectifiers and voltage regulators are extensively used in microgrids (MGs). The MG dynamic behavior challenges both stability and control effectiveness in the presence of CPLs. CPLs characteristics such as negative incremental resistance, synchronization, and control loop dynamic with similar frequency range of the inverter disturb severely the MG stability. Additionally, the MG stability problem will be more sophisticated with a high penetration level of CPLs in MGs. The stability analysis becomes more essential especially with high-penetrated CPLs. In this paper, the dynamic stability performance of an MG involving a high penetration level of CPLs is analyzed and investigated. An autonomous MG engaging a number of CPLs and inverter distributed generations (DGs) is modeled and designed using MATLAB. Voltage, current, and power controllers are optimally designed, controlling the inverter DGs output. A power droop controller is implemented to share the output DGs powers. Meanwhile, the current and voltage controllers are employed to control the output voltage and current of all DGs. A phase-locked loop (PLL) is essentially utilized to synchronize the CPLs with the MG. The controller gains of the inverters, CPLs, power sharing control, and PLL are optimally devised using particle swarm optimization (PSO). As a weighted objective function, the error in the DC voltage of the CPL and active power of the DG is minimized in the optimal problem based on the time-domain simulation. Under the presence of high penetrated CPLs, all controllers are coordinately tuned to ensure an enhanced dynamic stability of the MG. The impact of the highly penetrated CPLs on the MG dynamic stability is investigated. To confirm the effectiveness of the proposed technique, different disturbances are applied. The analysis shows that the MG system experiences the instability challenges due to the high penetrated CPLs. The simulation results confirm the effectiveness of the proposed method to improve the MG dynamic stability performance. |
| first_indexed | 2024-03-10T12:07:44Z |
| format | Article |
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| language | English |
| last_indexed | 2024-03-10T12:07:44Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Mathematics |
| spelling | doaj.art-8b38fea15355460cb886d498c141cf1c2023-11-21T16:27:28ZengMDPI AGMathematics2227-73902021-04-019992210.3390/math9090922Dynamic Stability Performance of Autonomous Microgrid Involving High Penetration Level of Constant Power LoadsMohamed A. Hassan0Muhammed Y. Worku1Abdelfattah A. Eladl2Mohammed A. Abido3Center for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi ArabiaCenter for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi ArabiaElectrical Engineering Department, Faculty of Engineering, Mansoura University, Mansoura 35516, EgyptElectrical Engineering Department, Faculty of Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi ArabiaNowadays, behaving as constant power loads (CPLs), rectifiers and voltage regulators are extensively used in microgrids (MGs). The MG dynamic behavior challenges both stability and control effectiveness in the presence of CPLs. CPLs characteristics such as negative incremental resistance, synchronization, and control loop dynamic with similar frequency range of the inverter disturb severely the MG stability. Additionally, the MG stability problem will be more sophisticated with a high penetration level of CPLs in MGs. The stability analysis becomes more essential especially with high-penetrated CPLs. In this paper, the dynamic stability performance of an MG involving a high penetration level of CPLs is analyzed and investigated. An autonomous MG engaging a number of CPLs and inverter distributed generations (DGs) is modeled and designed using MATLAB. Voltage, current, and power controllers are optimally designed, controlling the inverter DGs output. A power droop controller is implemented to share the output DGs powers. Meanwhile, the current and voltage controllers are employed to control the output voltage and current of all DGs. A phase-locked loop (PLL) is essentially utilized to synchronize the CPLs with the MG. The controller gains of the inverters, CPLs, power sharing control, and PLL are optimally devised using particle swarm optimization (PSO). As a weighted objective function, the error in the DC voltage of the CPL and active power of the DG is minimized in the optimal problem based on the time-domain simulation. Under the presence of high penetrated CPLs, all controllers are coordinately tuned to ensure an enhanced dynamic stability of the MG. The impact of the highly penetrated CPLs on the MG dynamic stability is investigated. To confirm the effectiveness of the proposed technique, different disturbances are applied. The analysis shows that the MG system experiences the instability challenges due to the high penetrated CPLs. The simulation results confirm the effectiveness of the proposed method to improve the MG dynamic stability performance.https://www.mdpi.com/2227-7390/9/9/922constant power loadmicrogriddynamic stabilityoptimizationPLLpower-sharing control |
| spellingShingle | Mohamed A. Hassan Muhammed Y. Worku Abdelfattah A. Eladl Mohammed A. Abido Dynamic Stability Performance of Autonomous Microgrid Involving High Penetration Level of Constant Power Loads Mathematics constant power load microgrid dynamic stability optimization PLL power-sharing control |
| title | Dynamic Stability Performance of Autonomous Microgrid Involving High Penetration Level of Constant Power Loads |
| title_full | Dynamic Stability Performance of Autonomous Microgrid Involving High Penetration Level of Constant Power Loads |
| title_fullStr | Dynamic Stability Performance of Autonomous Microgrid Involving High Penetration Level of Constant Power Loads |
| title_full_unstemmed | Dynamic Stability Performance of Autonomous Microgrid Involving High Penetration Level of Constant Power Loads |
| title_short | Dynamic Stability Performance of Autonomous Microgrid Involving High Penetration Level of Constant Power Loads |
| title_sort | dynamic stability performance of autonomous microgrid involving high penetration level of constant power loads |
| topic | constant power load microgrid dynamic stability optimization PLL power-sharing control |
| url | https://www.mdpi.com/2227-7390/9/9/922 |
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