大型风电场的控制性能评价标准及储能控制策略研究

发布时间：2018-11-05 20:20

【摘要】：为提高大型风电场并网可靠性,该文基于严密的数学统计方法,提出了一种以控制风电场出线功率控制偏差(wind power control error,WPCE)为考核目标的风电场控制性能评价标准(wind control performance standard,WCPS)。该标准以随机变量统计特性为依据制定,着眼于长期的控制性能,更能如实描述和反映风电出力随机性和不确定性的特点和要求,达到更好的控制目的。基于WCPS标准,提出了风电场配置的储能系统的充放电控制策略,以平抑风电出力波动性,提高风电的消纳能力。最后,以某风电场日负荷数据为例验证该控制标准和控制策略的可行性和有效性。仿真结果表明,所提控制策略大幅减小了风电预测误差,有效地减少储能系统的充放电调节次数,缓解备用机组的负担,降低电网调节成本,提高电网对风电的吸纳能力,对电力市场模式下的风电场接入系统具有指导意义。
[Abstract]:In order to improve the reliability of large-scale wind farm grid connection, based on the rigorous mathematical statistics method, this paper presents a method to control the deviation of wind farm output line power control (wind power control error,). WPCE) is the standard for evaluating the control performance of wind farm (wind control performance standard,WCPS). The standard is based on the statistical characteristics of random variables, focusing on long-term control performance, more truthfully describing and reflecting the characteristics and requirements of randomness and uncertainty of wind power generation, and achieving a better control purpose. Based on the WCPS standard, the charge and discharge control strategy of the energy storage system configured by wind farm is proposed to stabilize the fluctuation of wind power output and improve the wind power absorption ability. Finally, the feasibility and effectiveness of the control standard and control strategy are verified by taking the daily load data of a wind farm as an example. The simulation results show that the proposed control strategy greatly reduces the prediction error of wind power, effectively reduces the charge and discharge regulation times of energy storage system, alleviates the burden of standby units, reduces the adjustment cost of power grid, and improves the absorptive capacity of the power grid to wind power. It is of guiding significance for the wind farm access system in the electricity market mode.
【作者单位】：广西电力系统最优化与节能技术重点实验室(广西大学);
【基金】：国家自然科学基金项目(51541707) 国家重点基础研究发展计划项目(973项目)(2013CB228205)~~
【分类号】：TM614

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