CAJ | 학술논문

随着竞争电力市场的出现,无功辅助服务或无功电力市场吸引了研究人员和系统运行人员越来越多的关注.无功是支持电力系统安全可靠运行的一个重要服务,不恰当的无功管理将损害其它电力市场的运行效率.最近的研究显示发电机无功出力具有无功负荷供给、系统安全保障和发电机有功输电支持等作用.因此很自然地,电力市场应给予用来支持发电机有功输电的无功出力以经济补偿,据此,这一无功出力分量可认为是发电机的最小无功出力.文章提出一种基于最优潮流模型的定量研究发电机无功出力基本分量的方法,以5母线系统算例结果阐释了相关概念,并讨论了影响发电机最小无功出力的运行约束.研究结果表明最小发电机无功出力分量确实存在,这证实了所提模型的合理性.
수착경쟁전력시장적출현,무공보조복무혹무공전력시장흡인료연구인원화계통운행인원월래월다적관주.무공시지지전력계통안전가고운행적일개중요복무,불흡당적무공관리장손해기타전력시장적운행효솔.최근적연구현시발전궤무공출력구유무공부하공급、계통안전보장화발전궤유공수전지지등작용.인차흔자연지,전력시장응급여용래지지발전궤유공수전적무공출력이경제보상,거차,저일무공출력분량가인위시발전궤적최소무공출력.문장제출일충기우최우조류모형적정량연구발전궤무공출력기본분량적방법,이5모선계통산례결과천석료상관개념,병토론료영향발전궤최소무공출력적운행약속.연구결과표명최소발전궤무공출력분량학실존재,저증실료소제모형적합이성.
With the emergence of competitive electricity power markets, reactive power ancillary services or reactive power markets have attracted more and more attention from researchers and system operators all over the world. Reactive power is an important system support service for the secure and reliable operation of power systems. Improper management of reactive power can also hinder the operational efficiency of other power markets. It has recently been recognized that the reactive power of a generator has several roles, namely, supplying reactive demand, maintaining system security and supporting its real power transmission. It is rational that the minimal reactive power used to support its real power transmission should not receive financial compensation in power markets. Hence this component of reactive power can be regarded as the minimal reactive power support of a generator.An optimal power flow (OPF) based method is proposed to study quantitatively basic components of a generator ' s reactive power.A simple 5-bus system is used to illustrate the proposed concept.The test results verify the rationality of the model and demonstrate the existence of minimal reactive power support of generators. The operational constraints that influence the generator's minimal reactive power support are also discussed.