In many regions,international power system interconnections provide economic,energy-security,environmental,and technical benefits.In contrast,such interconnections remain scarce in Northeast Asia.In 2016,after approvi...In many regions,international power system interconnections provide economic,energy-security,environmental,and technical benefits.In contrast,such interconnections remain scarce in Northeast Asia.In 2016,after approving a joint memorandum of understanding between major electric power companies from China,Japan,South Korea,and Russia,related initiatives regained momentum in the region.Nevertheless,the corresponding developments in Japan remain limited,mainly owing to the lack of involvement of Japanese electric power companies.This study represents a pioneering attempt to provide an economic assessment based on power exchange prices of a power system interconnection between Japan and South Korea regarding the competitiveness of electric power companies in terms of competitive business segments and strategic consequences.We found that although the position of Japanese generators may slightly deteriorate,that of the supply segment would substantially improve,thus suggesting that more opportunities than threats are derived from the interconnection.This promising outcome may foster the adoption of an interconnection with South Korea considering the positive economic and business perspectives in Japan.Furthermore,realizing the interconnection may improve the energy security and air quality in the region.展开更多
为解决苏州南部500 k V电网供电能力提升、特高压直流功率消纳等问题,投运了世界首套500 k V统一潮流控制器(unified power flow controller,UPFC)工程。本文针对苏南500 k V UPFC工程应用情况,结合电网潮流调节需求分析,梳理了UPFC系...为解决苏州南部500 k V电网供电能力提升、特高压直流功率消纳等问题,投运了世界首套500 k V统一潮流控制器(unified power flow controller,UPFC)工程。本文针对苏南500 k V UPFC工程应用情况,结合电网潮流调节需求分析,梳理了UPFC系统关键控制性能指标及控制功能要求,并在工程系统试验期间对相关的控制功能和性能进行重点测试,主要包括:苏南UPFC工程稳态控制精度、动态响应指标等基本性能指标,以及N-1紧急功率控制、电网故障UPFC闭锁及自动重启动控制的功能和性能等,用于检验UPFC控制能力及运行效果,并为后续工程建设、标准规范制定累积了重要实践经验和数据。展开更多
文摘In many regions,international power system interconnections provide economic,energy-security,environmental,and technical benefits.In contrast,such interconnections remain scarce in Northeast Asia.In 2016,after approving a joint memorandum of understanding between major electric power companies from China,Japan,South Korea,and Russia,related initiatives regained momentum in the region.Nevertheless,the corresponding developments in Japan remain limited,mainly owing to the lack of involvement of Japanese electric power companies.This study represents a pioneering attempt to provide an economic assessment based on power exchange prices of a power system interconnection between Japan and South Korea regarding the competitiveness of electric power companies in terms of competitive business segments and strategic consequences.We found that although the position of Japanese generators may slightly deteriorate,that of the supply segment would substantially improve,thus suggesting that more opportunities than threats are derived from the interconnection.This promising outcome may foster the adoption of an interconnection with South Korea considering the positive economic and business perspectives in Japan.Furthermore,realizing the interconnection may improve the energy security and air quality in the region.
文摘随着苏州南部电网500kV线路改造工程及10台300 MVA调相机工程的投运,该电网静/动态可靠性均得到了极大的提升,短路电流水平也随之提高。与此同时,苏州南部电网作为典型的大受端电网,其主要电源特高压锦苏直流具有季节性强的特点,导致电网存在直流换相失败风险大、直流双极闭锁后应急拉限电多等问题。加装500kV梅里—惠泉线路串联电抗器有效地控制了苏州南部电网500kV站点短路电流水平;500kV统一潮流控制器(unified power flow controller,UPFC)工程的投运显著提高了苏州南部电网对特高压交直流电网的承接能力和支撑作用。本文针对苏州南部电网在不同阶段的网架结构及UPFC发挥的作用,对串联电抗器的阻值选取进行了分析。在对串联电抗器与UPFC器协调优化的基础上,提出了既能满足短路电流控制需求,又能充分发挥UPFC潮流调节作用的串联电抗器安装阻值。
文摘为解决苏州南部500 k V电网供电能力提升、特高压直流功率消纳等问题,投运了世界首套500 k V统一潮流控制器(unified power flow controller,UPFC)工程。本文针对苏南500 k V UPFC工程应用情况,结合电网潮流调节需求分析,梳理了UPFC系统关键控制性能指标及控制功能要求,并在工程系统试验期间对相关的控制功能和性能进行重点测试,主要包括:苏南UPFC工程稳态控制精度、动态响应指标等基本性能指标,以及N-1紧急功率控制、电网故障UPFC闭锁及自动重启动控制的功能和性能等,用于检验UPFC控制能力及运行效果,并为后续工程建设、标准规范制定累积了重要实践经验和数据。
