我国电力交易结构及工商业购电成本拆解

Report Industry Investment Rating No relevant information provided. Core Viewpoints of the Report The full implementation of the electricity spot market is a crucial task in China's electricity market reform. The electricity market consists of a medium - long - term market and a spot market. The medium - long - term market locks in forward electricity prices to avoid spot price fluctuations, while the spot market discovers prices through short - term and instantaneous supply - demand changes. The electricity purchase methods of industrial and commercial users can be divided into three categories, and their costs are affected by factors such as priority power generation scale, coal - fired power marginal generation cost, energy supply structure, and market supply - demand relationship. China's electricity futures market has not yet fully met the short - term listing conditions and requires further improvement of market rules and implementation of relevant policies [1][2][3]. Summary by Relevant Catalogs 1. Spot Market Environment for Electricity Energy Transactions 1.1 Spot Market Environment for Electricity Trading Rules - The electricity energy market consists of a medium - long - term market and a spot market. The medium - long - term market provides revenue expectations for power generation enterprises, and the spot market guides flexible peak - shaving of units. As of August 2025, 7 provincial electricity spot markets have been officially launched, and Anhui and Shaanxi aim to launch by the end of June 2026. China has basically established a trading system that integrates medium - long - term, spot, auxiliary service, and capacity markets [12][13]. - Medium - long - term electricity energy market trading rules: Market participants include power generation enterprises, power users, etc. There are four trading methods, and key elements such as trading units and contract cycles need to be clearly defined. Annual and monthly transactions have their own characteristics, and the decomposition curve of electricity quantity has two determination methods. Power generation can be divided into priority and market - oriented generation, and the corresponding electricity consumption also has priority and market - oriented parts. The actual market - price - forming participants in medium - long - term transactions are mainly non - priority power generation and relevant power - purchasing entities, and exchanges often set price limits [16][18][21]. - Spot electricity energy market trading rules: Spot trading includes day - ahead and real - time trading. The "full - quantity declaration, centralized optimization and clearing" method is adopted. All market participants must declare their electricity consumption or generation and quotes for the next day. The market clearing price of the day - ahead and real - time markets is the marginal node price, which is composed of system electricity price and congestion price and is mainly determined by coal - fired power marginal generation cost [26][29][30]. 1.2 Wholesale Market Electricity Fee Settlement and Off - market Differential Settlement for New Energy Projects - Wholesale market electricity fee settlement: The wholesale market uses a three - part settlement model, including medium - long - term contract electricity fees, day - ahead market deviation electricity fees, and real - time market deviation electricity fees. The settlement cycle is "daily clearing and monthly settlement". Due to high - proportion medium - long - term contracts, spot price fluctuations have less direct impact on market users [33][34][37]. - Off - market differential settlement for new energy projects: After new energy participates in the electricity market, a differential settlement mechanism is established outside the market. For existing projects before June 1, 2025, the mechanism electricity price is determined by provincial authorities, generally not higher than the local coal - fired power benchmark price. For new projects after June 1, 2025, the mechanism electricity price is determined through market competition. The differential settlement is carried out monthly, and the difference between the market trading average price and the mechanism electricity price is included in the local system operation cost [38][39][40]. 2. Decomposition of Industrial and Commercial Users' Electricity Purchase Costs 2.1 Industrial and Commercial Users' Electricity Purchase Methods - Since November 2021, China has abolished the industrial and commercial catalog sales electricity price. Industrial and commercial users can be divided into those directly participating in market transactions and those purchasing electricity through grid enterprises' agency. There are three types of direct - participating users: wholesale, retail, and those paying 1.5 times the agency purchase price. Wholesale users trade directly with power generation enterprises, retail users sign contracts with power - selling companies, and agency - purchase users establish an agency relationship with grid enterprises. The agency - purchase policy is a transitional arrangement [44][45][48]. 2.2 Industrial and Commercial Electricity Purchase Costs Based on the Electricity Spot Market - Industrial and commercial users have two electricity - charging rules: single - part and two - part systems. The single - part system is suitable for small users with stable electricity consumption, and the two - part system is suitable for large industrial users with large load fluctuations. The electricity purchase cost of industrial and commercial users mainly includes electricity fees, capacity (demand) fees, transmission and distribution fees, etc. The electricity fee is the most important variable part, accounting for 60% - 80% of the total cost, and the capacity (demand) fee and transmission and distribution fee account for 20% - 30% and 10% - 20% respectively [51][52][53]. - Wholesale users' electricity purchase cost: It is directly related to the medium - long - term and spot market prices. The annual medium - long - term contract signing situation is the key factor determining their annual electricity cost, but short - term market supply - demand changes also have an impact, which depends on the local electricity market trading plan [57][58][65]. - Agency - purchase users' electricity purchase cost: It is mainly determined by the agency - purchase price, which is composed of the weighted average of priority power generation and market - purchased electricity, plus transmission and distribution fees, etc. The priority power generation source and the market - purchased proportion vary by province. The agency - purchase price is affected by factors such as power source structure, purchase method, and policy requirements. Deviation electricity fees are shared or borne by users in the next month [67][68][71]. - Retail users' electricity purchase cost: It depends on the retail package type, which can be divided into fixed - price packages and floating - price packages. Different regions have different retail package classifications. For example, Guangdong's retail market has a large scale, and its electricity price must be linked to the market price to a certain extent. In Shanxi, the medium - long - term trading is mainly monthly, and the industrial and commercial electricity price may fluctuate greatly within a year [82][83][90]. 2.3 Main Factors Affecting Industrial and Commercial Electricity Purchase Costs - Priority power generation scale: It is an important source of grid - agency - purchased electricity. The scale is affected by factors such as power source structure, residents' and agricultural electricity consumption, and the implementation of policies. After the 136th document, the impact on the overall scale of priority power generation is expected to be small [95][96][97]. - Coal - fired power marginal generation cost: Coal - fired power is the marginal pricing unit. Fuel cost accounts for 60% - 70% of the coal - fired power cost and fluctuates greatly. China has established a medium - long - term coal - electricity contract system to stabilize prices. The price of medium - long - term coal - electricity contracts is determined by a reasonable price range and a "benchmark price + floating price" mechanism, and the spot price has a certain influence on it [100][101][102]. - Energy supply structure: China's power structure is still dominated by coal - fired power. The marginal cost of new energy power generation such as wind and solar is close to zero, and hydropower has the lowest cost. With the increase in low - cost clean energy power generation, the market price center will be under pressure. The mechanism electricity price of new energy projects affects the purchase cost of end - users, and the mechanism electricity price of incremental projects is determined through market competition, which is conducive to reducing the overall market purchase cost [103][105].