光伏逆变器参与西北送端大电网快速频率响应能力实测分析

发布时间：2018-07-09 19:39

本文选题：西北电网 + 光伏逆变器　；参考：《电网技术》2017年09期

【摘要】：近年来,西北电网新能源快速发展,挤占具有转动惯量的常规电源机组空间,电网一次调频资源储备下降,抗扰动能力降低,迫切需要研究新能源机组参与大电网调频的实现方法。通过选取西北电网内4台光伏逆变器,仿照常规水、火电机组的有功-频率静态特性,修改光伏逆变器控制策略,完成光伏逆变器有功-频率下垂控制,实现光伏逆变器参与电网快速频率响应的功能。结合2016年上半年西北电网频率特性试验,首次在国内系统性完成了光伏逆变器快速频率响应能力实测分析。结果表明,光伏逆变器可参与电网快速频率响应,其响应特性与水电机组一次调频性能相当,优于火电机组,且折算到相同容量下,快速频率响应贡献能力优于常规火电机组一次调频贡献能力。
[Abstract]:In recent years, with the rapid development of new energy sources in Northwest China Power Grid, the space of conventional power generating units with moment of inertia has been squeezed, and the reserve of primary frequency modulation resources has decreased, and the ability to resist disturbance has been reduced. There is an urgent need to study the realization method of new energy generating units participating in large power grid FM. By selecting four photovoltaic inverters in the Northwest Power Grid, the active power-frequency static characteristics of conventional water and thermal power generating units are modeled, and the control strategy of photovoltaic inverter is modified to complete the active power-frequency droop control of photovoltaic inverter. The function of photovoltaic inverter participating in fast frequency response of power grid is realized. Based on the frequency characteristic test of Northwest Power Grid in the first half of 2016, the fast frequency response capability of photovoltaic inverter is analyzed systematically in China for the first time. The results show that the photovoltaic inverter can participate in the fast frequency response of the power grid, and its response characteristics are equivalent to the primary frequency modulation performance of the hydropower unit, which is superior to the thermal power unit, and can be converted to the same capacity. The contribution ability of fast frequency response is better than that of primary frequency modulation of conventional thermal power unit.
【作者单位】：国家电网公司西北分部;中国电力科学研究院;宁夏电力公司;
【分类号】：TM464;TM615

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