六字界风电场工程无功补偿分析及电能质量评估

发布时间：2018-03-07 02:02

本文选题：电力电子设备　切入点：六字界风电场　出处：《广西大学》2014年硕士论文　论文类型：学位论文

【摘要】：现代电力电子设备的快速发展,促进风力发电和并网技术逐渐趋于成熟,并得到广泛应用。但由于电力电子设备构成的功率变换器自身的非线性特性,极有可能引起电网电流和电压波形发生畸变,造成电网谐波污染。同时风电作为一种新兴能源,其波动性和不可预测性对电网电压及风电场的无功补偿产生新的影响。因此,为了保证电网安全稳定运行,有必要对风电场的无功配置和电能质量开展专题研究。本文首先基于桂林六字界风电场的地理位置、气候环境及相关政策规划,推导出合理的六字界风电场接入系统推荐方案。并借助于PSD电力系统分析软件—BPA潮流程序,在经典的丰大、丰小、枯大、枯小四种电力系统运行方式下,对该风电场从空载到满发时系统潮流和无功电压进行分析计算。计算结果表明,在风电场满发时,建议配置无功补偿装置的处理调节范围为-5.0-10.0Mvar,无功补偿装置的动态无功补偿装置容量应不小于总补偿量的50%。其次,本文对六字界风电场接入系统所引起的电压偏差、闪变、波动、谐波及低电压穿越能力进行综合分析,以实现对该风电场电能质量的评估。通过成熟的电力系统仿真软件PSCAD仿真验证表明,该风电机组的低电压穿越能力完全符合国家标准规定；四种运行方式下,风电场从零出力到满发,并网点和PCC点的电压偏差符合规程要求,电压闪变满足国际要求,电压波动也满足限制要求,不超标；在不加背景谐波的情况下,并网点的各次谐波电流和电压畸变率均符合国际标准。最后,仿真分析背景谐波即电铁牵引站的引进对风电场谐波的影响,结果表明,各次谐波电压含有率和电压畸变率将不符合要求,需要加强治理。通过本文的研究,不仅为实际的六字界风电场工程如何配置无功补偿和何时需要进行谐波治理提供了依据,而且对于其它风电场接入系统如何进行无功补偿计算和电能质量评估提供了有效的方法,可以用作同类工程进行参考,具有很强的实践意义和借鉴意义。
[Abstract]:The rapid development of modern power electronic equipment, to promote wind power generation and grid technology gradually mature, and widely used. But because of the nonlinear characteristic of power electronic equipment. The power converter itself, most likely caused by the power grid voltage and current waveform distortion, caused by harmonic pollution. At the same time, wind power as a new energy. The volatility and unpredictability of the reactive power compensation has an affect on the voltage of power grid and wind power. Therefore, in order to ensure the safe and stable operation of power grid, it is necessary to work without electricity can configure and carry out research on the quality of the wind farm. Firstly, based on the Guilin six words community wind farm location, climate the environment and related policy planning, recommended to derive reasonable six word boundary wind farm system. And with the help of PSD power system analysis software - BPA program, in the classical Feng, Feng A small, dry, dry operation mode of four power system, the wind from no load to full time system power flow and reactive power voltage is analyzed. The calculation results show that the wind farm full of hair, suggested configuration of reactive power compensation device adjustment range is -5.0-10.0Mvar, dynamic reactive power compensation of reactive power compensation device capacity should be not less than the total compensation amount of 50%. second, voltage deviation, this is caused by the six word boundary wind farms flicker, fluctuation, harmonics and low voltage ride through comprehensive analysis, in order to assess the power quality of wind power. The power system simulation software PSCAD verify that the mature, low voltage ride through capability of the wind turbine fully conforms to the national standard; four kinds of operation modes of wind farm output from zero to full load, and voltage deviation outlets and PCC meets the specification requirements, electrical Flicker meet international requirements, also meet the requirements of voltage fluctuation, does not exceed the standard; in the absence of background harmonic case, and outlets of the harmonic current and voltage distortion rate are in line with international standards. Finally, the simulation analysis is the introduction of background harmonic influence on wind power station, the results show that the electric traction harmonic field iron, harmonic voltage ratio and voltage distortion rate will not meet the requirements, the need to strengthen governance. Through this research, not only the six word boundary wind farm project for the actual allocation of reactive power compensation and when to provide the basis for harmonic governance, but also for other wind farms to compensate reactive power calculation and the power quality assessment provides an effective method, can be used as a reference for the similar project, which has a strong practical significance and reference.

【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM614;TM714.3

【相似文献】