CAJ | 학술논문

在高风电渗透率的刚性源端系统中，风电参与调度运行的模式需从负负荷向部分可控电源转变，而集群风电以虚拟机组(wind farm cluster virtual power generation unit， WCVPG)形式参与调度运行是提高风电可调度性的可行方案。该文作为系列文章的第2部分，基于文章第1部分建立的WCVPG时变概率模型，提出一种WCVPG调度特性与风险指标量化方法，为其以电源形式参与调度模型做出定量化的性能评价。首先，从可发功率、可发功率极限、出力调节范围和爬坡率四个方面提出 WCVPG 调度特性指标概率量化方法；然后，基于条件风险价值理论，提出 WCVPG的安全性和经济性风险指标量化方法；进而，基于多状态概率分布基本运算，提出调度特性与风险指标计算方法；最后，基于实测数据比较了单个风电场与同一风电场公共连接点(point of common coupling，PCC)的风电场组合WCVPG调度特性指标和风险指标差异；分析了风电不确定性和波动性概率分布时变特性对WCVPG调度特性和风险指标的影响。
재고풍전삼투솔적강성원단계통중，풍전삼여조도운행적모식수종부부하향부분가공전원전변，이집군풍전이허의궤조(wind farm cluster virtual power generation unit， WCVPG)형식삼여조도운행시제고풍전가조도성적가행방안。해문작위계렬문장적제2부분，기우문장제1부분건립적WCVPG시변개솔모형，제출일충WCVPG조도특성여풍험지표양화방법，위기이전원형식삼여조도모형주출정양화적성능평개。수선，종가발공솔、가발공솔겁한、출력조절범위화파파솔사개방면제출 WCVPG 조도특성지표개솔양화방법；연후，기우조건풍험개치이론，제출 WCVPG적안전성화경제성풍험지표양화방법；진이，기우다상태개솔분포기본운산，제출조도특성여풍험지표계산방법；최후，기우실측수거비교료단개풍전장여동일풍전장공공련접점(point of common coupling，PCC)적풍전장조합WCVPG조도특성지표화풍험지표차이；분석료풍전불학정성화파동성개솔분포시변특성대WCVPG조도특성화풍험지표적영향。
In the wind and thermal power transmitter system with high wind power penetration, the mode that wind power participate in dispatch should be changed from negative load to partly dispatchable power source. Taking wind farm cluster as a virtual power generation unit (WCVPG) to participate the dispatch is a potential way to increase wind power’s dispatchability. As the second part of the paper, a quantitative method for WCVPG’s dispatch characteristics and risk indices had been put forward based on the time-varying probability mode proposed in the first part of the paper. The indices provide the foundation to consider WCVPG as quasi power source in the dispatch model. Firstly, the dispatch characteristic indices have been proposed from four aspects: available power, available power limit, power output adjustable range and ramp rate limit. Then, based on the theory of Conditional Value at Risk, the quantitative methods for WCVPG’s safe and economical risk indices have been proposed. Afterwards, based on the multi-state probability distribution, the calculation methods for dispatch characteristic and risk indices have been put forward. Finally, the dispatch characteristic and risk indices among wind farm, wind farm group and WCVPG has been compared. The influence of time-varying probability distribution of wind power’s uncertainty and variability probabilistic distribution on the dispatch characteristic and risk indices of WCVPG has been analyzed.