东北负电价破局之路（下篇）——火电技术改造的转型逻辑

Core Insights - The article discusses the unprecedented negative electricity prices in Northeast China during the 2026 Spring Festival, highlighting the challenges faced by coal-fired power companies in balancing supply and demand amidst high renewable energy generation [2][3] - It draws parallels with European experiences, particularly Denmark, where similar issues were addressed through technological upgrades and market reforms, allowing coal power to transition from a primary energy source to a flexible service provider [3][9] Group 1: Market Dynamics - From February 14 to 23, 2026, the weighted average price in the Liaoning real-time market was negative for 9 trading days, with 8 days hitting the lower limit of -100 yuan per megawatt-hour, and negative price periods accounting for 96.98% of the time [2] - In contrast to the higher renewable energy penetration in Europe, Northeast China's lower renewable share (31.9% in Heilongjiang, 24.09% in Liaoning, and 36.83% in Inner Mongolia) resulted in longer negative price durations, indicating that the issue stems from the inflexibility of coal-fired power plants [3] Group 2: Technological Solutions - European coal power plants have achieved world-leading flexibility metrics, with Denmark's advanced units operating at minimum outputs as low as 15%-20%, and Germany's large hard coal units reaching 25%-30% [4] - The article emphasizes the importance of decoupling heat and power generation, utilizing technologies such as thermal storage tanks and electric boilers to allow coal plants to operate flexibly and efficiently [4][9] Group 3: Profitability Strategies - Post-upgrade, coal power plants have shifted their profit sources from basic electricity generation to diversified market revenues, including risk mitigation and arbitrage during negative price periods [7] - The ability to participate in ancillary service markets has become a significant revenue stream, with flexible units achieving response rates of 4%-6% Pe/min, which is substantially higher than standard electricity prices [7][8] - Stable cash flows from heat supply contracts provide a buffer against electricity market volatility, allowing coal plants to maintain profitability even during low electricity price periods [8] Group 4: Future Outlook - The transition of coal power from a primary energy source to a flexible service provider is essential for addressing the challenges posed by negative electricity prices, as demonstrated by European practices [9] - The article suggests that the integration of demand-side heating solutions and supply-side flexibility upgrades must work in tandem to effectively resolve the negative pricing issues in Northeast China [9]