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Optimal Multi-objective Number, Locating, and Sizing of distributed Generations and distributed static compensators Considering Loadability using the Genetic Algorithm

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ELECTRIC POWER COMPONENTS AND SYSTEMS 2016年第19期44卷 2161-2171页

作者： Karami, Hossein Zaker, Behrooz Vahidi, Behrooz Gharehpetian, Gevork Babamalek Amirkabir Univ Technol Dept Elect Engn Tehran *** Iran

Due to the development of distribution systems and an increase in electricity demand, and to overcome the shortcomings of distribution systems, such as high loss and low loadability, the use of distributed generations and flexible AC transmission systems devices, such as distributed static compensators, has been increased. The number, place, and capacity of these devices are significant factors affecting network loss reduction, influencing investment costs, and improving network performance. In this article, a new multi-objective function is proposed and optimized based on the genetic algorithm. The multi-objective function includes system loadability, and total costs include investment costs of distributed generations and distributed static compensators and network loss. The proposed method is applied to the IEEE 33-bus and 69-bus test systems. According to the simulation results, the total costs and system loadability have conflict with each other, and one can select each Pareto front point as an optimal point depending on the priority of system loadability or total cost.

关键词： distributed generation distributed static compensator multi-objective optimization system loadability

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Photovoltaic system operation as DSTATCOM for power quality improvement employing active current control

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IET GENERATION TRANSMISSION & DISTRIBUTION 2020年第17期14卷 3518-3529页

作者： Patel, Nirav Gupta, Nitin Babu, B. Chitti Malaviya Natl Inst Technol Jaipur Dept Elect Engn JLN Marg Jaipur 302017 Rajasthan India Indian Inst Informat Technol Design & Mfg Dept Elect & Commun Engn Chennai Tamil Nadu India

This paper presents photovoltaic (PV) system control as distributed static compensator (DSTATCOM), termed as PV-DSTATCOM, operated with active current control (ACC) and feed-forward control loop (FFCL). Besides active power injection into the utility grid, the proposed PV system autonomously transforms into a DSTATCOM to provide various ancillary services including source current harmonic suppression, load reactive current compensation, zero sequences component mitigation, and power factor correction. Since PV-DSTATCOM operates with ACC, it precisely extracts the fundamental in-phase and quadrature components of current. It introduces high-gain at the third-order harmonic and thereby alleviates stationary errors in the current control loop of PV inverter. The proposed ACC+FFCL structure is computationally efficient and unconditionally stable. Practically, FFCL addresses the challenges emerged due to nonlinearity introduced by the PV unit and ensure a rapid power balance between the PV unit and electric grid. Further, a simplified perturb and observe based maximum power point tracker has been employed to evacuate the maximum power from the PV array. The proficiency of the developed ACC+FFCL structure is investigated through a comprehensive set of transient studies using MATLAB/Simulink software. Finally, a laboratory setup has been developed using the dSPACE-1104 platform and experimental results are recorded with detailed comparative evaluation.

关键词： maximum power point trackers electric current control invertors static VAr compensators power supply quality photovoltaic power systems photovoltaic system operation power quality improvement active current control photovoltaic system control distributed static compensator ACC FFCL active power injection ancillary services load reactive current compensation zero sequences component mitigation power factor correction PV-DSTATCOM inverter current control loop PV inverter PV system rapid power balance PV unit maximum power point tracker PV array source current harmonic suppression feed-forward control loop reactive current compensation utility grid perturb and observe Matlab-Simulink software dSPACE-1104 platform

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Simple and efficient control of DSTATCOM in three-phase four-wire polluted grid system using MCCF-SOGI based controller

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IET GENERATION TRANSMISSION & DISTRIBUTION 2018年第5期12卷 1213-1222页

作者： Chittora, Prakash Singh, Alka Singh, Madhusudan Delhi Technol Univ Dept Elect Engn Bawana Rd Delhi 110042 India

Load current may become highly distorted in a weak power system network due to the presence of non-linear and dynamic loads. Harmonics get penetrated into the supply system too;thereby making it polluted and rich in harmonic content and causing a detrimental effect on the performance of other connected loads. In such cases, the conventional control algorithms fail to work effectively to mitigate power quality (PQ) issues. This study addresses solutions to PQ issues which get aggravated in the presence of distorted supply. This study proposes a multiple complex coefficient filter (MCCF)-second-order generalised integrator (SOGI)-based controller designed to effectively compensate for PQ problems associated with weak grid. A MCCF filter is designed to extract the fundamental components of grid voltage used further for grid synchronisation. The SOGI is designed to extract the fundamental active current magnitude of the load current and reduce PQ issues with the help of distributed static compensator (DSTATCOM). Neutral current compensation is achieved with an appropriately designed zigzag transformer. Extensive simulation and hardware results realising dSPACE 1104 as Digital Signal Processor are considered in this study to show that the performance of the proposed control algorithm under PQ issues with distorted grid.

关键词： power grids power supply quality power harmonic filters electric current control digital signal processing chips power transformers static VAr compensators synchronisation power system control DSTATCOM three-phase four-wire polluted grid system MCCF-SOGI based controller load current weak power system network nonlinear loads dynamic loads harmonic content power quality issues PQ issues multiple complex coefficient filter second-order generalised integrator PQ problems MCCF filter grid voltage fundamental active current magnitude grid synchronisation distributed static compensator neutral current compensation zigzag transformer dSPACE 1104 digital signal processor

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Modelling and simulation of KHLMS algorithm-based DSTATCOM

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IET POWER ELECTRONICS 2019年第9期12卷 2304-2311页

作者： Mangaraj, Mrutyunjaya Panda, Anup Kumar Natl Inst Sci & Technol Berhampur 761008 OR India Natl Inst Technol Rourkela 769008 OR India

The assessment of the shunt compensation allied power quality glitches bounds the design and modelling of a controller for the d-FACTS (Distribution Flexible Alternating current Transmission System) device. So, Kernel Hebbian least mean square (KHLMS) is proposed for controlling the distributed static compensator (DSTATCOM) in this study. The KHLMS is the improved version of an adaptive LMS (ALMS), which is designed by using a suitable pattern of learning mechanism. Both the controller algorithms are formulated on the basis of mathematical equations using MATLAB/Simulink. In accordance with the system variation adaptability and experimental application, each phase controller is configured as an independent neural network structure. The objective of control algorithms is used for the extraction of fundamental active and reactive components from load currents for the generation of the reference source currents. In comparison with the ALMS algorithm, the KHLMS demonstrates more effective in improving the voltage regulation at DC link capacitor, voltage balancing, source current harmonic reduction, and power factor correction under the disturbance influences caused by even and uneven loading.

关键词： voltage control power supply quality phase control power distribution control static VAr compensators harmonics suppression flexible AC transmission systems power factor correction MATLAB Simulink system variation adaptability phase controller independent neural network structure control algorithms fundamental active components reactive components load currents reference source currents ALMS algorithm source current harmonic reduction power factor correction simulation KHLMS algorithm-based DSTATCOM shunt compensation allied power quality glitches design modelling d-FACTS device Distribution Flexible Alternating current Transmission System Kernel Hebbian least mean square distributed static compensator adaptive LMS suitable pattern learning mechanism controller algorithms mathematical equations

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Comparative Performance Analysis of DG and DSTATCOM Using Improved PSO Based on Success Rate for Deregulated Environment

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IEEE SYSTEMS JOURNAL 2018年第3期12卷 2791-2802页

作者： Ghatak, Sriparna Roy Sannigrahi, Surajit Acharjee, Parimal Kalinga Inst Ind Technol Univ Dept Elect Engn Bhubaneswar 751024 Odisha India Natl Inst Technol Dept Elect Engn Durgapur 713209 India

A new and improved particle swarm optimization (PSO) technique with adaptive inertia weight (w) based on success rate is proposed to find the optimal allocation of distributed generation (DG) and distribution static compensator (DSTATCOM) considering security limits. For the optimal sizing and siting of the device, technical, economic, and social objectives are considered. Logical and innovative indexes namely voltage profile enhancement index, benefit cost ratio, and emission cost benefit index are formulated to judge the impact of the device on the system. The developed algorithm is executed for both full search space (all load bus locations) and reduced search space (only unhealthy zone/locations) to prove that the optimal allocation is obtained only at the unhealthy zone. For the IEEE 33 and IEEE 69 bus systems, the proposed algorithm is compared with other techniques such as differential evolution, real-coded genetic algorithm, and PSO based on randomized inertia weight, and PSO based on linearly decreasing inertia weight. The best performance in terms of computational efficiency and solution quality is achieved for the proposed method. Further, a comparative performance analysis is presented between DG and DSTATCOM based on the economic, technical, and social impacts.

关键词： Benefit cost ratio (BCR) deregulated environment distributed generation (DG) distributed static compensator emission cost benefit index (ECBI) line loss optimal allocation unhealthy bus voltage profile enhancement index (VPEI)

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Optimised planning of distribution network with photovoltaic system, battery storage, and DSTATCOM

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IET RENEWABLE POWER GENERATION 2018年第15期12卷 1823-1832页

作者： Ghatak, Sriparna Roy Sannigrahi, Surajit Acharjee, Parimal KIIT Univ Sch Elect Engn Bhubaneswar 751024 Odisha India NIT Durgapur Elect Engn Dept MG Ave Durgapur 713209 India

In this circumstance of global warming, energy market deregulation, and enormous load growth, distribution network entails a proficient strategy to maintain the reliability and efficiency of the power service. Incorporation of solar photovoltaic (PV) system and battery storage (BS) in coordination with distributed static compensator (DSTATCOM) is a competent and practical approach to alleviate the power quality and reliability concern. In this study, a comprehensive strategic model is presented to optimally deploy PV, BS, and DSTATCOM to maximise voltage profile improvement, reliability, economic, and ecological benefit of the network. An accurate and precise novel voltage profile improvement indicator namely network voltage profile improvement index is proposed. Benefit-cost ratio and environment benefit index are proposed to quantify economic and environmental benefits, respectively. Similarly, reliability indices such as expected energy not served are used to appraise the system reliability. A fuzzy based extended version of NSGA II is utilised for the optimal deployment of the devices considering security limits. The proposed method is tested on 33-bus and 69-bus distribution networks considering time variant practical load models and the obtained results validate the efficacy and efficiency of the proposed method when compared with other multi-objective algorithms.

关键词： power markets photovoltaic power systems genetic algorithms static VAr compensators power supply quality distributed power generation fuzzy set theory cost-benefit analysis power generation reliability power distribution planning battery storage BS distributed static compensator DSTATCOM power quality comprehensive strategic model network voltage profile improvement index benefit-cost ratio environment benefit index economic benefits reliability indices system reliability 69-bus distribution networks time variant practical load models global warming energy market deregulation solar photovoltaic system power service reliability distribution network optimised planning photovoltaic system voltage profile improvement indicator fuzzy based NSGA II extended version 33-bus distribution networks BS BS

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A Techno-Economic Centric Integrated Decision-Making Planning Approach for Optimal Assets Placement in Meshed Distribution Network Across the Load Growth

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ENERGIES 2020年第6期13卷 1444-1444页

作者： Kazmi, Syed Ali Abbas Khan, Usama Ameer Ahmad, Hafiz Waleed Ali, Sajid Shin, Dong Ryeol Natl Univ Sci & Technol USPCAS E H-12 Campus Islamabad 44000 Pakistan Sungkyunkwan Univ SKKU Coll Informat & Commun Engn Dept Elect & Comp Engn Suwon 16419 South Korea

The modern distribution networks under the smart grid paradigm have been considered both interconnected and reliable. In grid modernization concepts, the optimal asset optimization across a certain planning horizon is of core importance. Modern planning problems are more inclined towards a feasible solution amongst conflicting criteria. In this paper, an integrated decision-making planning (IDMP) approach is proposed. The proposed methodology includes voltage stability assessment indices linked with loss minimization condition-based approach, and is integrated with different multi-criteria decision-making methodologies (MCDM), followed by unanimous decision making (UDM). The proposed IDMP approach aims at optimal assets sitting and sizing in a meshed distribution network to find a trade-off solution with various asset types across normal and load growth horizons. An initial evaluation is carried out with assets such as distributed generation (DG), photovoltaic (PV)-based renewable DG, and distributed static compensator (D-STATCOM) units. The solutions for various cases of asset optimization and respective alternatives focusing on technical only, economic only, and techno-economic objectives across the planning horizon have been evaluated. Later, various prominent MCDM methodologies are applied to find a trade-off solution across different cases and scenarios of assets optimization. Finally, UDM is applied to find trade-off solutions amongst various MCDM methodologies across normal and load growth levels. The proposed approach is carried out across a 33-bus meshed configured distribution network. Findings from the proposed IDMP approach are compared with available works reported in the literature. The numerical results achieved have validated the effectiveness of the proposed planning approach in terms of better performance and an effective trade-off solution across various asset types.

关键词： distributed generation distribution network distribution network planning distributed static compensator losses minimizations mesh distribution network multi-criteria decision making unanimous decision making voltage stability assessment index

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Real-time simulation and performance of DSTATCOM using an improved load current detection-based control technique for compensation of current harmonics and load transients

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EPE JOURNAL 2021年第1期31卷 1-16页

作者： Penthia, Trilochan Panda, Anup Kumar Mangaraj, Mrutyunjaya Zhejiang Univ Coll Elect Engn Hangzhou Peoples R China Natl Inst Technol Dept Elect Engn Rourkela India Lendi Inst Engn & Technol Elect & Elect Engn Vizianagaram India

Current harmonics are introduced in a distribution system due to the increasing utilization of nonlinear loads. Therefore, elimination of harmonics from supply current is an inevitable task to do. In this paper, an adaptive control technique called I-cos-theta (Icos theta) control algorithm along with a Kernel-based training method is proposed in a fuel cell-based distributed static compensator (DSTATCOM) simulation for harmonic compensation. Specifically, the direct and quadrature components of the load current are extracted and retrained using the Kernel-based Icos theta control algorithm. The control algorithm is implemented to generate reference currents, and then the appropriate switching pulses for the Voltage Source Inverter (VSI) of the DSTATCOM. The fuel cell is intended to maintain the DC-link voltage of the DSTATCOM during different loading conditions for power quality improvement. Further, the DC-link voltage is maintained constant at 530 V with an acceptable voltage regulation of <+/- 16%, even under load transients and temporary supply failure conditions. Moreover, the simulation of the fuel cell-based DSTATCOM has been performed in Sim Power System (SPS)/MATLAB Simulink software. Also, a low power rated prototype is developed to verify the proposed simulation model, incorporating with the dSPACE1104 real-time environment.

关键词： Custom power device distributed static compensator power quality Icos theta control algorithm Kernel learning method current harmonics elimination energy storage systems

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Enhancement of Power Quality in Wind Power Distribution System Using DVR and DSTATCOM Based Agent System

Enhancement of Power Quality in Wind Power Distribution Syst...

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Conference on Innovations in Power and Advanced Computing Technologies (i-PACT)

作者： Thirupathaiah, M. Prasad, P. Venkata Ganesh, V. Chaitanya Bharathi Inst Technol Dept EEE Hyderabad Andhra Prades India JNTUA Coll Engn Dept EEE Pulivendula Andhra Prades India

ISBN: (纸本)9781509056828

The power protection of individual consumer in a country is ensured through the system of electric power distribution. Therefore the system of electric power distribution should provide power in a reliable manner. The term reliability is well coordinate with quality of power in the distribution system. It is very much important to maintain the power quality in power distribution system for continuity of service. The power quality problem mainly arise in the distribution system are the harmonics, voltage sag, swell and power variations. In this paper, the power quality improvement in wind power distribution system is considered as the intention. The improvement is fulfilled with FACTS compensation devices DTATCOM and DVR. The agent system is considered for the proposed work, which means a switching device is used and it compares the output signal of DVR and DSTATCOM. From the comparison the best control signal is selected. The realization of the proposed work is exemplified with existing technique and proved.

关键词： Wind power distribution system power quality improvement dynamic voltage restorer distributed static compensator proportional integral controller

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Simulation and Comparison of DVR and D-STATCOM for Voltage Sag Mitigation 6

Simulation and Comparison of DVR and D-STATCOM for Voltage S...

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6th IEEE International Conference on Power Systems (ICPS)

作者： Singh, Shweta Rai, Vivekanand Kumar, Awadhesh Sahay, Kishan Bhusan MMMUT Dept Elect Engn Gorakhpur Uttar Pradesh India

ISBN: (纸本)9781509001286

In this paper the detail description of Flexible AC Transmission devices in distribution network are presented so as to mitigate the voltage sag at the network buses. Two FACTS devices are implemented in this paper namely distributed static compensator (DSTATCOM) and Dynamic Voltage restorer (DVR). DSTATCOM provides injection of shunt current into the system and DVR provides injection of series voltage into the system to solve the problem of short term reduction in the root mean square voltage of the system. These two devices are very effectual devices working on the principle of Voltage Source Inverter. This paper elaborates the performance of the DVR and DSTATCOM during voltage sag problems. Simulation studies have been carried out to affirm the consequences. DVR and DSTATCOM are modeled and simulated using the MATLAB/Simulink and simpower system toolboxes.

关键词： distributed static compensator Dynamic Voltage Restorer Voltage Sag Voltage Source Inverter

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