CAJ | 학술논문

光伏发电具有明显的波动性和间歇性，目前尚不参与电力平衡，被认为是一种只提供电量价值、不提供容量价值的电源。但实践证明光伏发电与电网负荷具有较强的相关性，多数情况下可发挥削峰作用，忽略其容量价值将导致严重的资源浪费。因此，随着光伏发电在部分电网中穿透功率水平的不断提高，光伏发电的置信容量评估问题逐渐成为电网规划中关注的新热点。文中首先总结了光伏发电置信容量的评估指标和评估方法；按性质对评估指标进行分类，并比较了各类指标的优缺点，根据比较结果给出了推荐的指标；详细地论述了置信容量的评估方法，指出了目前的研究热点和未来的发展方向。然后从光伏电站、电网侧、用户侧多角度提出了光伏发电置信容量的提高措施，并对其可行性、应用前景及相关技术进行了讨论。最后，基于系统的调节能力论述了光伏发电置信容量的保障措施。
광복발전구유명현적파동성화간헐성，목전상불삼여전력평형，피인위시일충지제공전량개치、불제공용량개치적전원。단실천증명광복발전여전망부하구유교강적상관성，다수정황하가발휘삭봉작용，홀략기용량개치장도치엄중적자원낭비。인차，수착광복발전재부분전망중천투공솔수평적불단제고，광복발전적치신용량평고문제축점성위전망규화중관주적신열점。문중수선총결료광복발전치신용량적평고지표화평고방법；안성질대평고지표진행분류，병비교료각류지표적우결점，근거비교결과급출료추천적지표；상세지논술료치신용량적평고방법，지출료목전적연구열점화미래적발전방향。연후종광복전참、전망측、용호측다각도제출료광복발전치신용량적제고조시，병대기가행성、응용전경급상관기술진행료토론。최후，기우계통적조절능력논술료광복발전치신용량적보장조시。
Photovoltaic （PV） generation is still considered to be an energy-replacement rather than capacity-replacement source and absent from power balance because of its fluctuating and intermittent nature. PV output is proven to have strong relationship with load and plays peak-shaving role in most cases, as such ignoring its capacity value will lead to serious waste of resources. As the PV penetration increases rapidly in recent years, evaluation of PV capacity credit is becoming one of the hottest issues in power system planning. Firstly, the evaluation metrics and methods of PV capacity credit are summarized. Evaluation metrics are classified by their characteristics and a recommended metric is given according to the results of comparison; evaluation methods are discussed in detail, including the research hotspots and developing directions＇. Secondly, improvement measures of PV capacity credit are proposed from aspects of PV power station, grid side and demand side. Furthermore, the rrfeasibility, prospects and related technology are analyzed. Finally, the safeguard measures of PV capacity credit from the point of power system flexibility are explored.