The experiments of large consumers direct power trading is conducting in china nationwide, and it’s important to the reform of electricity market. To compensated efficiencies in security correction of large consumers...The experiments of large consumers direct power trading is conducting in china nationwide, and it’s important to the reform of electricity market. To compensated efficiencies in security correction of large consumers direct power trading, a novel security correction method based on DC power transfer distribution factor was proposed. Using the presented method to comply security correction, all the transactions that satisfy the specific requirements of maximizing social welfare are able to enter security correction process, and when the power of transmission line is out of limit, this method avoid the transaction which causes this problem is abandoned directly by introducing supplement transactions. The simulation has shown that the proposed security correction method of large consumers direct power trading based on DC power transfer distribution factor is effective.展开更多
In order to facilitate the electricity market operation and trade in the restructured environment, ample transmission capability should be provided to satisfy the demand of increasing power transactions. The conflict ...In order to facilitate the electricity market operation and trade in the restructured environment, ample transmission capability should be provided to satisfy the demand of increasing power transactions. The conflict of this requirement and the restrictions on the transmission expansion in the restructured electrical market has motivated the development of methodologies to enhance the Available Transfer Capability (ATC) of the existing transmission grids. The insertion of FACTS devices in electrical systems seems to be a promising strategy to enhance ATC. In this paper, the viability and technical merits of boosting ATC using Thyristor Controlled Series Compensator (TCSC) is being analyzed. The work has been carried out on IEEE 30 bus and IEEE 118 bus systems. Bilateral and multilateral transactions are considered. Particle Swarm Optimization (PSO) algorithm and Genetic Algorithm (GA) are employed to obtain the optimal settings of TCSC.展开更多
为快速识别实时潮流转移,基于直流潮流-补偿原理推导了用于快速预估多支路开断后潮流分布的支路开断分布因子(Line Tripping Distribution Factors,LTDF)的计算方法,结合改进的严重度函数,给出了用于评价支路受潮流转移影响程度的过载...为快速识别实时潮流转移,基于直流潮流-补偿原理推导了用于快速预估多支路开断后潮流分布的支路开断分布因子(Line Tripping Distribution Factors,LTDF)的计算方法,结合改进的严重度函数,给出了用于评价支路受潮流转移影响程度的过载严重度指标和关键支路集的概念及其求解过程,对单支路或多支路开断同样适用,为后续减载控制策略缩小了分析范围。对New-England 10机39节点系统的算例分析表明,该方法可准确预估开断后潮流,快速有效识别受潮流转移影响严重支路,克服了以往仅用分布因子去评价支路受潮流转移影响程度的不确切性和漏选重要支路的不足,具备合理性、可行性及快速性。展开更多
可用输电能力(available transfer capability,ATC)的大小不仅能够衡量电力系统安全和可靠性,同时在一定程度上能够反映电力市场交易双方获得利润的多少。随着分布式发电(distributed generation,DG)的广泛开展,其对ATC的影响不容忽视...可用输电能力(available transfer capability,ATC)的大小不仅能够衡量电力系统安全和可靠性,同时在一定程度上能够反映电力市场交易双方获得利润的多少。随着分布式发电(distributed generation,DG)的广泛开展,其对ATC的影响不容忽视。为此,首先基于ATC的定义,阐述了DG对ATC的影响机理;提出了考量DG对ATC影响的分析方法,利用交流潮流法建立了DG输出功率对线路潮流和节点电压影响的数学模型。采用MAT-LAB6.5编写相关的计算程序,通过6节点和30节点测试系统的算例分析,证明了分析方法和数学模型能够有效考量DG对ATC产生的影响。且方法可应用于含有DG设备的配电网规划及电力市场的交易决策中。展开更多
文摘The experiments of large consumers direct power trading is conducting in china nationwide, and it’s important to the reform of electricity market. To compensated efficiencies in security correction of large consumers direct power trading, a novel security correction method based on DC power transfer distribution factor was proposed. Using the presented method to comply security correction, all the transactions that satisfy the specific requirements of maximizing social welfare are able to enter security correction process, and when the power of transmission line is out of limit, this method avoid the transaction which causes this problem is abandoned directly by introducing supplement transactions. The simulation has shown that the proposed security correction method of large consumers direct power trading based on DC power transfer distribution factor is effective.
文摘In order to facilitate the electricity market operation and trade in the restructured environment, ample transmission capability should be provided to satisfy the demand of increasing power transactions. The conflict of this requirement and the restrictions on the transmission expansion in the restructured electrical market has motivated the development of methodologies to enhance the Available Transfer Capability (ATC) of the existing transmission grids. The insertion of FACTS devices in electrical systems seems to be a promising strategy to enhance ATC. In this paper, the viability and technical merits of boosting ATC using Thyristor Controlled Series Compensator (TCSC) is being analyzed. The work has been carried out on IEEE 30 bus and IEEE 118 bus systems. Bilateral and multilateral transactions are considered. Particle Swarm Optimization (PSO) algorithm and Genetic Algorithm (GA) are employed to obtain the optimal settings of TCSC.
文摘为快速识别实时潮流转移,基于直流潮流-补偿原理推导了用于快速预估多支路开断后潮流分布的支路开断分布因子(Line Tripping Distribution Factors,LTDF)的计算方法,结合改进的严重度函数,给出了用于评价支路受潮流转移影响程度的过载严重度指标和关键支路集的概念及其求解过程,对单支路或多支路开断同样适用,为后续减载控制策略缩小了分析范围。对New-England 10机39节点系统的算例分析表明,该方法可准确预估开断后潮流,快速有效识别受潮流转移影响严重支路,克服了以往仅用分布因子去评价支路受潮流转移影响程度的不确切性和漏选重要支路的不足,具备合理性、可行性及快速性。
文摘可用输电能力(available transfer capability,ATC)的大小不仅能够衡量电力系统安全和可靠性,同时在一定程度上能够反映电力市场交易双方获得利润的多少。随着分布式发电(distributed generation,DG)的广泛开展,其对ATC的影响不容忽视。为此,首先基于ATC的定义,阐述了DG对ATC的影响机理;提出了考量DG对ATC影响的分析方法,利用交流潮流法建立了DG输出功率对线路潮流和节点电压影响的数学模型。采用MAT-LAB6.5编写相关的计算程序,通过6节点和30节点测试系统的算例分析,证明了分析方法和数学模型能够有效考量DG对ATC产生的影响。且方法可应用于含有DG设备的配电网规划及电力市场的交易决策中。
