|2020-01-13 来源： 中国石化新闻网|
贾丽 摘译自 美国能源情报署
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.