Based on the theory of complex adaptive system(CAS),the optimal allocation model of water resources in sewage irrigation areas was established,which provided new ideas and application value for the rational utilizatio...Based on the theory of complex adaptive system(CAS),the optimal allocation model of water resources in sewage irrigation areas was established,which provided new ideas and application value for the rational utilization of agricultural production and waste water resources.The results demonstrated that the difference of crop energy capture mainly depended on the development stage.Waste water with a certain concentration was able to promote crop growth,while excessive concentration inhibited crop growth.The correlation between water absorption rate and leaf area index was close(R=0.9498,p<0.01).The amount of bad seeds increased at a speed of 34.7·d^-1,when system irrigated randomly in the seedling stage,while it tended to remain stable at a speed of 0.3·d^-1 after plants entering the mature stage which impacted the total yields of crops.展开更多
This research develops a comprehensive method to solve a combinatorial problem consisting of distribution system reconfiguration, capacitor allocation, and renewable energy resources sizing and siting simultaneously a...This research develops a comprehensive method to solve a combinatorial problem consisting of distribution system reconfiguration, capacitor allocation, and renewable energy resources sizing and siting simultaneously and to improve power system's accountability and system performance parameters. Due to finding solution which is closer to realistic characteristics, load forecasting, market price errors and the uncertainties related to the variable output power of wind based DG units are put in consideration. This work employs NSGA-II accompanied by the fuzzy set theory to solve the aforementioned multi-objective problem. The proposed scheme finally leads to a solution with a minimum voltage deviation, a maximum voltage stability, lower amount of pollutant and lower cost. The cost includes the installation costs of new equipment, reconfiguration costs, power loss cost, reliability cost, cost of energy purchased from power market, upgrade costs of lines and operation and maintenance costs of DGs. Therefore, the proposed methodology improves power quality, reliability and security in lower costs besides its preserve, with the operational indices of power distribution networks in acceptable level. To validate the proposed methodology's usefulness, it was applied on the IEEE 33-bus distribution system then the outcomes were compared with initial configuration.展开更多
为解决黑河中游大满灌区水资源分配不合理,地下水超采等问题,该研究根据灌区实际情况预测了不同规划年(2026、2030年)灌区的需水量,提出了一种包含成本效益、缺水风险和磷污染控制的多目标水资源配置模型,采用自适应的非支配排序遗传算...为解决黑河中游大满灌区水资源分配不合理,地下水超采等问题,该研究根据灌区实际情况预测了不同规划年(2026、2030年)灌区的需水量,提出了一种包含成本效益、缺水风险和磷污染控制的多目标水资源配置模型,采用自适应的非支配排序遗传算法(adaptive nondominated sorting genetic algorithmⅢ,A-NSGA-Ⅲ)对模型进行求解,建立水资源配置方案评价体系,通过客观赋权法(criteria importance through intercriteria correlation,CRITIC)-优劣解距离法(technique for order preference by similarity to an ideal solution,TOPSIS)法对不同配置方案进行优选。结果表明:大满灌区2026年和2030年规划的供水量指标较预测的最大需水量分别缺水约1383.97万和332.93万m^(3),水资源供需矛盾突出;经优化配置后,2026年和2030年灌区用水总量分别是21043万和21459.17万m^(3),均满足灌区规划年供水总量指标约束;相较2021年,配置方案中不同规划年地表水使用量分别增加约3171.95万和4943.59万m^(3),地下水开采量减少约6301.48万和7656.95万m^(3),较大程度地减少了灌区地下水的开采量。该研究提出的多目标水资源优化配置模型在大满灌区有较好的适用性,水资源优化配置方案符合实际,可为黑河中游其他灌区的水资源优化配置提供理论支撑和参考依据。展开更多
水资源优化配置是均衡水资源与发展的关键措施,能够缓和水资源供需矛盾,促进经济和生态协调发展。通过借助水资源评价方法对海原县水资源开发利用状况进行分析,构建GWAS(General Water Allocation and Simulation Model)配置模型,并进...水资源优化配置是均衡水资源与发展的关键措施,能够缓和水资源供需矛盾,促进经济和生态协调发展。通过借助水资源评价方法对海原县水资源开发利用状况进行分析,构建GWAS(General Water Allocation and Simulation Model)配置模型,并进行规划年(2025年、2035年)海原县水资源优化配置研究,为海原县实现水资源、流域和区域经济社会与生态环境保护协调发展提供理论依据。配置结果显示,在75%的来水条件下规划年(2025年、2035年)可供水量分别达12 706万m^(3)和12 892万m^(3),不能满足用水量的全部配置,建议加强非常规水源的利用,合理配置引黄水和地下水资源,实现县域水资源的优化配置。展开更多
基金Supported by the Science and Technology Research Project of the Ministry of Education(14YJCZH017)the Major State Basic Research Development Program of China(973 Program)(2017YFC0404503)+1 种基金Key Cultivation Project of Lingnan Normal University in 2019(LZ1903)Lingnan Normal University Special Talent Program(ZL2007)
文摘Based on the theory of complex adaptive system(CAS),the optimal allocation model of water resources in sewage irrigation areas was established,which provided new ideas and application value for the rational utilization of agricultural production and waste water resources.The results demonstrated that the difference of crop energy capture mainly depended on the development stage.Waste water with a certain concentration was able to promote crop growth,while excessive concentration inhibited crop growth.The correlation between water absorption rate and leaf area index was close(R=0.9498,p<0.01).The amount of bad seeds increased at a speed of 34.7·d^-1,when system irrigated randomly in the seedling stage,while it tended to remain stable at a speed of 0.3·d^-1 after plants entering the mature stage which impacted the total yields of crops.
文摘This research develops a comprehensive method to solve a combinatorial problem consisting of distribution system reconfiguration, capacitor allocation, and renewable energy resources sizing and siting simultaneously and to improve power system's accountability and system performance parameters. Due to finding solution which is closer to realistic characteristics, load forecasting, market price errors and the uncertainties related to the variable output power of wind based DG units are put in consideration. This work employs NSGA-II accompanied by the fuzzy set theory to solve the aforementioned multi-objective problem. The proposed scheme finally leads to a solution with a minimum voltage deviation, a maximum voltage stability, lower amount of pollutant and lower cost. The cost includes the installation costs of new equipment, reconfiguration costs, power loss cost, reliability cost, cost of energy purchased from power market, upgrade costs of lines and operation and maintenance costs of DGs. Therefore, the proposed methodology improves power quality, reliability and security in lower costs besides its preserve, with the operational indices of power distribution networks in acceptable level. To validate the proposed methodology's usefulness, it was applied on the IEEE 33-bus distribution system then the outcomes were compared with initial configuration.
文摘为解决黑河中游大满灌区水资源分配不合理,地下水超采等问题,该研究根据灌区实际情况预测了不同规划年(2026、2030年)灌区的需水量,提出了一种包含成本效益、缺水风险和磷污染控制的多目标水资源配置模型,采用自适应的非支配排序遗传算法(adaptive nondominated sorting genetic algorithmⅢ,A-NSGA-Ⅲ)对模型进行求解,建立水资源配置方案评价体系,通过客观赋权法(criteria importance through intercriteria correlation,CRITIC)-优劣解距离法(technique for order preference by similarity to an ideal solution,TOPSIS)法对不同配置方案进行优选。结果表明:大满灌区2026年和2030年规划的供水量指标较预测的最大需水量分别缺水约1383.97万和332.93万m^(3),水资源供需矛盾突出;经优化配置后,2026年和2030年灌区用水总量分别是21043万和21459.17万m^(3),均满足灌区规划年供水总量指标约束;相较2021年,配置方案中不同规划年地表水使用量分别增加约3171.95万和4943.59万m^(3),地下水开采量减少约6301.48万和7656.95万m^(3),较大程度地减少了灌区地下水的开采量。该研究提出的多目标水资源优化配置模型在大满灌区有较好的适用性,水资源优化配置方案符合实际,可为黑河中游其他灌区的水资源优化配置提供理论支撑和参考依据。
文摘水资源优化配置是均衡水资源与发展的关键措施,能够缓和水资源供需矛盾,促进经济和生态协调发展。通过借助水资源评价方法对海原县水资源开发利用状况进行分析,构建GWAS(General Water Allocation and Simulation Model)配置模型,并进行规划年(2025年、2035年)海原县水资源优化配置研究,为海原县实现水资源、流域和区域经济社会与生态环境保护协调发展提供理论依据。配置结果显示,在75%的来水条件下规划年(2025年、2035年)可供水量分别达12 706万m^(3)和12 892万m^(3),不能满足用水量的全部配置,建议加强非常规水源的利用,合理配置引黄水和地下水资源,实现县域水资源的优化配置。
