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GA and PSO culled hybrid technique for economic dispatch problem with prohibited operating zones 被引量:4
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作者 SUDHAKARAN M. AJAY-D-VIMALRAJ P. PALANIVELU T.G. 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第6期896-903,共8页
This paper presents an efficient and reliable genetic algorithm (GA) based particle swarm optimization (PSO) tech- nique (hybrid GAPSO) for solving the economic dispatch (ED) problem in power systems. The non-linear c... This paper presents an efficient and reliable genetic algorithm (GA) based particle swarm optimization (PSO) tech- nique (hybrid GAPSO) for solving the economic dispatch (ED) problem in power systems. The non-linear characteristics of the generators, such as prohibited operating zones, ramp rate limits and non-smooth cost functions of the practical generator operation are considered. The proposed hybrid algorithm is demonstrated for three different systems and the performance is compared with the GA and PSO in terms of solution quality and computation efficiency. Comparison of results proved that the proposed algo- rithm can obtain higher quality solutions efficiently in ED problems. A comprehensive software package is developed using MATLAB. 展开更多
关键词 Economic dispatch (ED) Genetic algorithm (GA) Particle swarm optimization (PSO) Hybrid GAPSO Prohibited operating zone CROSSOVER MUTATION Velocity
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Modified Cuckoo Search Algorithm to Solve Economic Power Dispatch Optimization Problems 被引量:16
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作者 Jian Zhao Shixin Liu +2 位作者 Mengchu Zhou Xiwang Guo Liang Qi 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2018年第4期794-806,共13页
A modified cuckoo search(CS) algorithm is proposed to solve economic dispatch(ED) problems that have nonconvex, non-continuous or non-linear solution spaces considering valve-point effects, prohibited operating zones,... A modified cuckoo search(CS) algorithm is proposed to solve economic dispatch(ED) problems that have nonconvex, non-continuous or non-linear solution spaces considering valve-point effects, prohibited operating zones, transmission losses and ramp rate limits. Comparing with the traditional cuckoo search algorithm, we propose a self-adaptive step size and some neighbor-study strategies to enhance search performance.Moreover, an improved lambda iteration strategy is used to generate new solutions. To show the superiority of the proposed algorithm over several classic algorithms, four systems with different benchmarks are tested. The results show its efficiency to solve economic dispatch problems, especially for large-scale systems. 展开更多
关键词 Cuckoo search(CS) economic dispatch(ED) prohibited operating zones ramp rate limits valve-point effects
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Zoning operation of energy piles to alleviate the soil thermal imbalance of ground source heat pump systems 被引量:2
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作者 Tian You Weitao Zeng 《Energy and Built Environment》 2023年第1期57-63,共7页
Energy piles have attracted increasing interest for application in ground source heat pumps,because it is environment-friendly,energy-efficient,and without additional drilling cost.However,when there is a large dif-fe... Energy piles have attracted increasing interest for application in ground source heat pumps,because it is environment-friendly,energy-efficient,and without additional drilling cost.However,when there is a large dif-ference between the heating and cooling loads,the system will suffer from a soil thermal imbalance which may further decline the system performance and even cause a system failure.A hybrid ground source heat pump sys-tem that integrates auxiliary equipment can solve the problem,however,it needs additional investment and a complicated control strategy.In this paper,the zoning operation of energy piles can effectively improve the tem-perature recovery ability of soil in the energy pile group and thus alleviate the soil thermal imbalance.Specifically,a heating-dominated residential building in Beijing is selected for a case study,with 144 energy piles arranged in a 12×12 layout.An analytical model of the spiral-coil energy pile group with seepage will be adopted,which can consider the groundwater flow,the geometry of spiral coils,and the thermal interaction among different energy piles,achieving high calculation accuracy and fast calculation speed.Based on this analytical energy pile model,a system model will be built to investigate the system performance influenced by different zoning operation strategies.Results show that intensive heat injection into the center of the pile group(Strategy 2 and Strategy 3)or heat extraction from the outer layer of the pile group(Strategy 4)can relieve the cold accumulation.Strategy 2 can relieve the outlet temperature decline from 5.54℃ to 4.46℃ and improve the heating COP from 3.297 to 3.423 compared to the conventional full operation strategy.Although the annual heat pump COP of Strategy 2 is a little lower than that of conventional full operation strategy,Strategy 2 has the shortest unmet heating or cooling time.Therefore,the proposed zoning operation strategy can achieve good system efficiency and excellent system reliability compared to the conventional strategy. 展开更多
关键词 Ground source heat pump Energy pile Zoning operation Soil thermal imbalance Cold accumulation
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Addressing Economic Dispatch Problem with Multiple Fuels Using Oscillatory Particle Swarm Optimization
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作者 Jagannath Paramguru Subrat Kumar Barik +4 位作者 Ajit Kumar Barisal Gaurav Dhiman Rutvij HJhaveri Mohammed Alkahtani Mustufa Haider Abidi 《Computers, Materials & Continua》 SCIE EI 2021年第12期2863-2882,共20页
Economic dispatch has a significant effect on optimal economical operation in the power systems in industrial revolution 4.0 in terms of considerable savings in revenue.Various non-linearity are added to make the foss... Economic dispatch has a significant effect on optimal economical operation in the power systems in industrial revolution 4.0 in terms of considerable savings in revenue.Various non-linearity are added to make the fossil fuel-based power systems more practical.In order to achieve an accurate economical schedule,valve point loading effect,ramp rate constraints,and prohibited operating zones are being considered for realistic scenarios.In this paper,an improved,and modified version of conventional particle swarm optimization(PSO),called Oscillatory PSO(OPSO),is devised to provide a cheaper schedule with optimum cost.The conventional PSO is improved by deriving a mechanism enabling the particle towards the trajectories of oscillatory motion to acquire the entire search space.A set of differential equations is implemented to expose the condition for trajectory motion in oscillation.Using adaptive inertia weights,this OPSO method provides an optimized cost of generation as compared to the conventional particle swarm optimization and other new meta-heuristic approaches. 展开更多
关键词 Economic load dispatch valve point loading industry 4.0 prohibited operating zones ramp rate limit oscillatory particle swarm optimization
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New insights into component matching mechanism in the compression system of double bypass engine
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作者 Ruoyu Wang Xianjun Yu +1 位作者 Baojie Liu Guangfeng An 《Propulsion and Power Research》 SCIE 2024年第1期118-131,共14页
Variable cycle engine(VCE)is one of the most promising technologies for the next-generation aircraft,the matching of different components in the compression system is a key difficulty VCE faced.To investigate the comp... Variable cycle engine(VCE)is one of the most promising technologies for the next-generation aircraft,the matching of different components in the compression system is a key difficulty VCE faced.To investigate the component matching mechanisms in the VCE compression system,an advanced throughflow program is employed to calculate the characteristic lines of each component,and a zero-dimensional method is developed to cap-ture the component performance deviation during the coupling working process.By setting the compressor stall and choke conditions as the boundary,the operation range of the compression system isfirst clarified,and the aerodynamic performance in the operation zone is discussed,thus providing a theoretical basis for optimization of the engine operating con-trol scheme.Results show that the efficiency of the coreflow is optimum at the left-bottom corner of the operation region,while the total pressure ratio peaks at the right-top area,hence a balance is needed when deciding the matching point.Regulations of component control pa-rameters will change the position of the operation zone,as well as the corresponding aerody-namic performance.Decreasing the core driven fan stage rotating speed can improve the total bypass ratio,yet the total pressure ratio of the coreflow will be decreased.Closing the core driven fan stage inlet guide vane can increase the total bypass ratio without changing the core flow aerodynamic performance significantly.The bypass ratio of the compression system can also be increased by increasing the fan stall margin or decreasing its rotating speed,both ways will decrease the total pressure ratio of the core flow.Results of the study will benefit the variable cycle engine design process in operation point evaluation and thermodynamic cycle optimization. 展开更多
关键词 Matching analysis Double bypass engine Compression system operation zone Aerodynamic performance
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Optimal power flow calculation in AC/DC hybrid power system based on adaptive simplified human learning optimization algorithm 被引量:3
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作者 Jia CAO Zheng YAN +2 位作者 Xiaoyuan XU Guangyu HE Shaowei HUANG 《Journal of Modern Power Systems and Clean Energy》 SCIE EI 2016年第4期690-701,共12页
This paper employs an efficacious analytical tool,adaptive simplified human learning optimization(ASHLO)algorithm,to solve optimal power flow(OPF)problem in AC/DC hybrid power system,considering valve-point loading ef... This paper employs an efficacious analytical tool,adaptive simplified human learning optimization(ASHLO)algorithm,to solve optimal power flow(OPF)problem in AC/DC hybrid power system,considering valve-point loading effects of generators,carbon tax,and prohibited operating zones of generators,respectively.ASHLO algorithm,involves random learning operator,individual learning operator,social learning operator and adaptive strategies.To compare and analyze the computation performance of the ASHLO method,the proposed ASHLO method and other heuristic intelligent optimization methods are employed to solve OPF problem on the modified IEEE 30-bus and 118-bus AC/DC hybrid test system.Numerical results indicate that the ASHLO method has good convergent property and robustness.Meanwhile,the impacts of wind speeds and locations of HVDC transmission line integrated into the AC network on the OPF results are systematically analyzed. 展开更多
关键词 Adaptive simplified human learning optimization algorithm Optimal power flow AC/DC hybrid power system Valve-point loading effects of generators Carbon tax Prohibited operating zones
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Development and prospects of the fire space monitoring system in Kazakhstan 被引量:1
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作者 Lev SPIVAK Oleg ARKHIPKIN Gulshat SAGATDINOVA 《Frontiers of Earth Science》 SCIE CAS CSCD 2012年第3期276-282,共7页
This article provides a brief description of the fire space monitoring system in Kazakhstan, including the GIS-technology incorporated in its structure. The system performs operative space monitoring of fire areas and... This article provides a brief description of the fire space monitoring system in Kazakhstan, including the GIS-technology incorporated in its structure. The system performs operative space monitoring of fire areas and burnt areas, mapping of large fire areas, analysis of seasonal and long-term dynamics of burnt areas, and estimation of fire risk zones. Examples of output information obtained from space monitoring of fires are given. Possible directions of development of fire space monitoring in Kazakhstan are specified. 展开更多
关键词 space images remote sensing fire space monitoring fire areas burnt areas operating mapping zones of high fire risk
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Application of the invasive weed optimization algorithm to economic dispatch problems
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作者 T. JAYABARATHI Afshin YAZDANI V. RAMESH 《Frontiers in Energy》 SCIE CSCD 2012年第3期255-259,共5页
In this paper the invasive weed optimization algorithm has been applied to a variety of economic dispatch (ED) problems. The ED problem is concerned with minimizing the fuel cost by optimally loading the electrical ... In this paper the invasive weed optimization algorithm has been applied to a variety of economic dispatch (ED) problems. The ED problem is concerned with minimizing the fuel cost by optimally loading the electrical generators which are committed to supply a given demand. Some involve prohibited operating zones, transmission losses and valve point loading. In general, they are non-linear non-convex optimization problems which cannot be directly solved by conventional methods. In this work the invasive weed algorithm, a meta-heuristic method inspired by the proliferation of weeds, has been applied to four numerical examples and has resulted in promising solutions compared to published results. 展开更多
关键词 economic dispatch (ED) invasive weed optimization non-convexity prohibited operating zones(POZ) valve point loading META-HEURISTIC
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