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  

Actual Measurement and Analysis of Fast Frequency Response Capability of PV-Inverters in Northwest Power Grid

作　　者：孙骁强[1] 刘鑫[1] 程松[1] 段乃欣[1] 褚云龙[1] 张利[2] 严兵[3] 

机构地区：[1]国家电网公司西北分部,陕西省西安市710049 [2]中国电力科学研究院,北京市海淀区100192 [3]宁夏电力公司,宁夏回族自治区银川市750001

出　　处：《电网技术》2017年第9期2792-2798,共7页Power System Technology

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。In recent years, rapid development of renewable energy in Northwest Power Grid squeezes space of conventional generating unit with rotational inertia, declines the primary frequency regulation resources and reduces anti-perturbation ability. So it is an urgent need to study implementation of renewable energy generating units to participate in grid frequency control. In this paper, four photovoltaic（PV） inverters in Northwest Power Grid were selected. Following active power-frequency static characteristics of conventional hydro and thermal units, the PV inverter control strategy was modified to complete active power-frequency droop control, and finally the PV inverters achieved fast frequency response. Combined with frequency characteristics test of Northwest Power Grid in the first half of 2016, fast frequency response capability of the PV inverters was systematically completed in domestic systems for the first time. The result shows that the PV inverters can participate in fast frequency response of the power grid, and its response characteristics are equivalent to the primary frequency performance of hydropower unit, better than that of thermal power unit. Besides, the result also shows that fast frequency response contribution of PV inverters is better than that of conventional thermal unit with the same capacity.

关 键 词：西北电网 光伏逆变器 频率快速响应 有功-频率下垂控制 

分 类 号：TM72[电气工程—电力系统及自动化]