Example of undervoltage load shedding implementation

Klarić, Mario; Kuzle, Igor; Tešnjak, Sejid

doi:10.1109/afrcon.2007.4401446

Cited by 9 publications

(5 citation statements)

References 2 publications

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“…UVLS assesses itself as to be such a technique for voltage instability and collapse prohibition as it is very frugal and simple to implement [10]. The voltage on the most sensitive buses decreases when the system heavily loads which results in a shortage of reactive power backup and also this can happen due to poorly organized reactive power service.…”

Section: Optimal Load Shedding For Distribution Systemmentioning

confidence: 99%

Comparison and Assessment of Two Load Flow Methods for Optimum Under Voltage load Shedding in Distribution Power System

Al-Jubori¹,

Hussain²

2022

Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9

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Under voltage load shedding is considered to avoid voltage collapse. Usually, the loads are modelled as constant power types, while different load models are used in load flow studies. A study of optimal load shedding is presented in this research, along with a comparison and evaluation of two load flow methods taking into account various load models. The algorithm is used optimised Dolphin method to oachieve the voltage values of buses while also reducing losses. Under the health and fault cases of the system, a comprehensive comparison and assessment of the optimization performances for four different load shedding models constant power, constant current, constant impedance, and composite ZIP models were performed to determine which model provides the most improvement in the voltage profile and loss reduction using the MATLAB programme.

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Section: Optimal Load Shedding For Distribution Systemmentioning

confidence: 99%

Comparison and Assessment of Two Load Flow Methods for Optimum Under Voltage load Shedding in Distribution Power System

Al-Jubori¹,

Hussain²

2022

Proceedings of 2nd International Multi-Disciplinary Conference Theme: Integrated Sciences and Technologies, IMDC-IST 2021, 7-9

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“…The values of voltages on the busses that are the most sensitive decrease when the system is heavily load which consequences to sparsity of reserves of reactive power and this can also happen as a result of reactive power service that is disorganized. UVLS is implemented after several control operations flopped to respond with the necessary operating mode, so the corrective factor is applied [10]. The utilization of appropriate load shedding can reduce the investment losses while also improving the profile of voltage for economic reasons.…”

Section: Distribution System Optimal Load Sheddingmentioning

confidence: 99%

“…Table 6 shows the outcomes and comparison among the various models of loads without and with dual (DLS-OCP) technique using installation three capacitors based on the optimum position by applying TLBO algorithm at fault system case. Line (13)(14) is disconnected, and the network is then reconnected through tie-line (10)(11)(12)(13)(14) via tie switch, the information data of fault system is given in the reference [30]. The table findings demonstrate that the ZIP is the superior model for the DLS-OCP approach among the other models.…”

Section: Ieee 16 Bus (Fault System Case)mentioning

confidence: 99%

Dual techniques of load shedding and capacitor placement considering load models for optimal distribution system

Hussain

Al-Jubori

2022

IJECE

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<span lang="EN-US">Voltage stability represents one of the main issues in electrical power system. Under voltage load shedding (UVLS) has long been regarded as one of the most successful techniques to prevent the voltage collapse. However, the ordinary load shedding schemes do not consider the different load models and decreasing in the ‎economic cost that resulted from load disconnection, so the dual techniques of load shedding with reactive compensation are needed. Usually loads being modeled as constant power, while in fact of load flow the various load models are utilized. An investigation of optimal dual load shedding with reactive compensation for distribution system based on direct backward forward sweep method (DBFSM) load flow along with a comparison among the other load models are presented in this paper. The teaching learning-based optimization (TLBO) algorithm is executed in order to reduce power losses and enhance the voltage profile. This algorithm is tested and applied to IEEE-16 bus distribution test system to find the optimal superior capacitor size and placement while minimizing load shading for the network. Five different load shedding sequences are considered and the optimization performance of load models demonstrated the comparison through MATLAB program.</span>

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“…By combining Eqs. (9) and (11), the direct relationship between change in the voltage stability indicator (L-index) at load bus j and change in bus demand powers is obtained as:…”

Section: C) the Relation Between Voltage Stability Indicator And Loadmentioning

confidence: 99%

Emergency Load Shedding for Voltage Stability Enhancement: With Particular Reference to the Iraqi National Power Grid

Al-Rubayi¹,

Kdair²

2020

IJIES

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In the present days, power systems are operated favourably close to their stability limit. System stability can be safeguarded by employing an emergency control technique, known as load shedding; this technique is affected by shedding some loads. Such a technique implemented only when the voltage or frequency deterioration below a specific voltage or frequency threshold. In this work, an advanced emergency load shedding model is forwarded based on the voltage stability indicator aimed at enhancing voltage. This indicator facilitates online monitoring of voltage stability and predicts the voltage problem of the system with sufficient accuracy, fast and simple numerical calculation, also can work well in the steady-state as well as during the transient process. The proposed model and algorithm have been tested firstly on the IEEE 14 bus system as a standard system and then implemented on the Iraqi National Power Grid (INPG) as a particular reference system. The obtained results for the voltage profile has recovered by 11.1% for the standard system and 2.03% for the particular system.

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Example of undervoltage load shedding implementation

Cited by 9 publications

References 2 publications

Comparison and Assessment of Two Load Flow Methods for Optimum Under Voltage load Shedding in Distribution Power System

Comparison and Assessment of Two Load Flow Methods for Optimum Under Voltage load Shedding in Distribution Power System

Dual techniques of load shedding and capacitor placement considering load models for optimal distribution system

Emergency Load Shedding for Voltage Stability Enhancement: With Particular Reference to the Iraqi National Power Grid

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