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2019年美国极低气价拉低得州外的批发电价

2020-01-13 13:29:32
2019年美国极低气价拉低得州外的批发电价

原标题:2019年美国极低气价拉低得州外的批发电价

我国石化新闻网讯 据美国能源情报署1月10报导,除得克萨斯州外,2019年美国几个首要纽带的批发电价遍及低于2018年。夏日创纪录的高电力需求导致得州电力可靠性委员会(ERCOT)电力商场2019年批发电价大幅上涨。

2019年ERCOT 24小时批发电价平均为每兆瓦38美元,比2018年平均水平上涨了13%。在其他具有代表性的纽带,如新英格兰独立体系运营商(ISO-NE)、纽约独立体系运营商(NYISO)和PJM互联年平均批发电价,一般比2018年低15%~30%。批发电价下降很大程度上是2019年天然气价格下降的成果。

按年均核算,这些商场的批发电价低于2018年,月均电价仍低于75美元/兆瓦时,但ERCOT在外。在美国西北部,跨国天然气管道体系受到限制,导致该区域2月份批发电价上涨。这一增加也对加州的电力商场产生了影响,加州的电价在2月份也有所上涨。在新英格兰,及时交给液化天然气有助于削减本年第一季度天然气和电力商场的价格动摇。

相比之下,得克萨斯州的批发电价在2019年有所上涨。8月份ERCOT的月均批发价格最高,其时ERCOT的电力需求创下前史新高。得克萨斯州90%电力的电网运营商ERCOT具有美国电力商场最低的储藏利润率之一,这意味着它有一个相对较小的额定容量缓冲区,超出了满意该区域预期顶峰电力需求所需的容量。

贾丽 摘译自 美国能源情报署

原文如下:

Wholesale electricity prices were generally lower in 2019, except in Texas

Wholesale electricity prices at several major hubs were generally lower in 2019 than in 2018, except in Texas. Record-high electricity demand in the summer led to much higher 2019 wholesale electricity prices in the Electric Reliability Council of Texas (ERCOT) electricity market.

Around-the-clock wholesale electricity prices averaged $38 per megawatthour (MWh) in ERCOT in 2019, up 13% from their 2018 average. At other representative hubs—such as those in the Independent System Operator of New England (ISO-NE), New York Independent System Operator (NYISO), and PJM Interconnection—annual average wholesale electricity prices were generally 15% to 30% lower than in 2018. Much of this decline in wholesale electricity prices was the result of lower natural gas prices in 2019.

On an annual average basis, wholesale electricity prices in these markets were lower than in 2018, and monthly average prices remained lower than $75/MWh, except in ERCOT. In the northwestern United States, constraints on a transnational natural gas pipeline system resulted in higher wholesale electricity prices in the region in February. This increase also had implications for electricity markets in California, where prices also increased in February. In New England, timely deliveries of liquefied natural gas helped reduce price volatility for both natural gas and electric power markets in the first quarter of the year.

By comparison, Texas wholesale electricity prices increased in 2019. Monthly average wholesale prices in ERCOT were highest in August, when ERCOT saw record-high electricity demand. ERCOT—the grid operator for 90% of the electricity sold in Texas—has one of the lowest reserve margins of any electricity market region in the United States, meaning that it has a relatively small buffer of extra capacity beyond the amount needed to serve the expected peak electricity demand in the region.