西班牙电网运营商REE向监管机构发出警示称,西班牙本土电网出现电压突发波动,主要源于可再生能源发电计划的突变及具备动态电压控制功能电站的响应延迟。
REE表示,尽管电压波动仍处于监管标准之内,但这种情况可能导致部分发电或用电设备自动断开,影响电力系统稳定。 为应对这一情况,REE已向国家市场与竞争委员会(CNMC)申请临时批准调整多项运行程序,以强化电压控制和响应能力。调整内容涵盖调度流程、技术限制、二次调节及电压管理等方面。
REE计划将电压控制合规率要求提升至90%,并将采样频率提高至每周期60次。同时,计划要求部分电站预留调节能力以参与平衡市场,从而减少其在日内交易中的暴露风险。
作为临时措施,REE已暂时限制部分可再生能源的电力注入,以防电网电压过冲。
部分媒体根据REE信函报道可能存在“停电风险”,对此REE在社交媒体上澄清称:“鉴于部分报道,我们需向公众保证,我们并未提及任何即将或大范围停电的风险。我们确实观察到电压波动,但都在可控范围内,不影响供电安全。”
REE强调,这些举措属常规操作,旨在稳定受电力电子化发电影响日益加剧的电网。运营商指出,大型可再生能源项目接入输电网、小型自发自用系统接入配电网的数量快速增长,而后者不在其直接监控范围之内。
REE补充称,白天光伏发电强劲时,自发自用比例上升导致输电负荷骤降,使电网更易受有功功率波动影响,从而引发电压稳定性问题。
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