基于SCADA数据的风电机组发电量计算方法研究

发布时间：2019-06-10 04:04

【摘要】：随着环境污染问题受全球的重视,清洁能源的发展成为了全球各国关注的重点,如今世界各国都在大力发展风电行业。风电场的建设日渐趋于稳定,风电场运行后经济效益和风电机组的运行评估也逐渐受到各界研究的重视。风电机组的发电量是评估风电场运行后的经济效益重要指标,所以提高风电机组发电量计算的准确性有重要意义。对发电量的计算方法展开研究,发现国内外的研究中鲜少有人考虑温度对发电量的影响,在此基础上本文提出了基于温度归一化的发电量计算模型。发电量的计算方法中最为常用的发电量计算模型是用风速概率密度函数与风电机组的功率函数相积分,所以本文重点介绍了风频函数,风电机组的功率曲线特性。根据温度变化对空气密度的影响情况,发现空气密度的波动会进一步影响实际运行风电机组的输出功率,为了消除温度对发电量计算的折减,提出了该模型。为了验证基于温度归一化发电量计算模型的准确性,本文以新疆达坂城某风电场的历史运行SCADA数据为例,计算了达坂城风电场四台风电机组的年发电量。运用传统发电量的计算方法与本文提出的温度归一化的发电量计算方法进行对比,发现考虑温度的发电量计算结果数值小于传统算法的计算结果,该模型的计算结果更接近SCADA系统监测的实际上网电量,验证了该模型的准确性。由于温度对风电机组功率的影响特性,风电机组的制造厂商在设计风电机组时也应该结合温度波动特性设计控制策略,从而提高风电场的经济效益。
[Abstract]:With the global attention to the problem of environmental pollution, the development of clean energy has become the focus of attention all over the world. Now all countries in the world are vigorously developing the wind power industry. The construction of wind farm tends to be stable day by day, and the economic benefit and operation evaluation of wind turbine after wind farm operation have been paid more and more attention by all walks of life. The power generation of wind turbine is an important index to evaluate the economic benefit after the operation of wind farm, so it is of great significance to improve the accuracy of power generation calculation of wind turbine. The calculation method of power generation is studied, and it is found that few people at home and abroad consider the influence of temperature on power generation. On this basis, a power generation calculation model based on temperature normalization is proposed in this paper. The most commonly used power generation calculation model is to integrate the wind speed probability density function with the power function of the wind turbine, so this paper focuses on the wind frequency function and the power curve characteristics of the wind turbine. According to the influence of temperature change on air density, it is found that the fluctuation of air density will further affect the output power of wind turbine in actual operation. In order to eliminate the reduction of temperature to the calculation of power generation, the model is proposed. In order to verify the accuracy of the calculation model based on temperature normalization, the annual power generation of four typhoon units in Dabancheng wind farm in Xinjiang is calculated by taking the historical operation SCADA data of a wind farm in Dabancheng, Xinjiang as an example. By comparing the traditional calculation method of power generation with the calculation method of temperature normalization proposed in this paper, it is found that the calculation result of power generation considering temperature is smaller than that of the traditional algorithm. The calculation results of the model are closer to the actual network power monitored by SCADA system, which verifies the accuracy of the model. Because of the influence of temperature on the power of wind turbine, the manufacturer of wind turbine should also design the control strategy combined with the characteristics of temperature fluctuation, so as to improve the economic benefit of wind farm.
【学位授予单位】：新疆大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM614

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