CAJ | 학술논문

为准确评估风电场弃风时段的电量损失，提出了一种新的风电场理论功率与弃风电量计算方法-机舱风速法。该方法基于风电机组正常运行时段的输出功率与机舱风速计的测量风速建立映射关系，再应用到弃风时段，计算风电场的理论功率与弃风电量。为研究该方法的可靠性，分析了仪器测量偏差、风机尾流波动性、开停机状态对理论功率计算结果的影响，并给出了开、停机状态下机舱测量风速的换算方法。采用风电场实测数据对机舱风速法进行了验证，验证结果显示机舱风速法计算的理论功率的相关性系数平均为0.9960，均方根误差平均为1.87%，理论电量误差平均为0.68%。与已有方法相比，机舱风速法计算精度高，便于区分电量损失来源，能针对不同开机方案进行灵活设置。机舱风速法不需要建立测风塔，但如能引入测风塔数据修正机舱风速，有可能进一步提升计算精度。
위준학평고풍전장기풍시단적전량손실，제출료일충신적풍전장이론공솔여기풍전량계산방법-궤창풍속법。해방법기우풍전궤조정상운행시단적수출공솔여궤창풍속계적측량풍속건립영사관계，재응용도기풍시단，계산풍전장적이론공솔여기풍전량。위연구해방법적가고성，분석료의기측량편차、풍궤미류파동성、개정궤상태대이론공솔계산결과적영향，병급출료개、정궤상태하궤창측량풍속적환산방법。채용풍전장실측수거대궤창풍속법진행료험증，험증결과현시궤창풍속법계산적이론공솔적상관성계수평균위0.9960，균방근오차평균위1.87%，이론전량오차평균위0.68%。여이유방법상비，궤창풍속법계산정도고，편우구분전량손실래원，능침대불동개궤방안진행령활설치。궤창풍속법불수요건립측풍탑，단여능인입측풍탑수거수정궤창풍속，유가능진일보제승계산정도。
To accurately assess the energy loss of wind farm during wind power curtailment, a new method to calculate theoretical power of wind farm and energy loss due to wind power curtailment, which is called nacelle wind speed method, is proposed. A mapping relation based on output power of wind power generating unit under normal operation and the wind speed measured by turbine nacelle anemometers is established, and using the established relation to the time-interval of wind power curtailment, the theoretical power of wind farm and the energy loss due to wind power curtailment are calculated. To research the reliability of the proposed method, the impacts of measured deviation of instruments, the fluctuation of the turbine’s wake and the operating status of turbines on calculation result of theoretical power are analyzed, and a conversion method of wind speed measured in turbine nacelles under the conditions of being operated and being shut down of wind turbines is given. The wind power speed data measured in wind farm is used to validate the correctness of the proposed nacelle wind speed method, and validation results show that the average correlation coefficient of theoretical power calculated by the proposed nacelle wind speed method is 0.9660, the average root-mean-square error is 1.87%, the average error of calculated theoretical power is 0.68%. Using the proposed nacelle wind speed method, higher calculation accuracy can be attained than existing methods, and it is convenient for distinguishing the reasons of energy loss and can be flexibly set under various operating modes of wind turbine. It is not needed to built anemometer tower for nacelle wind speed method, however the calculation accuracy could be further improved when the wind speed measured by nacelle anemometer can be modified by the inducted anemometer tower data.