川渝输气管网管存控制技术及案例分析

川渝地区输气管网（简称“川渝管网”）管理跨度大，产运销协调难度也较大，利用管存动态监控管理实现临时供气应急对于提高川渝管网调度应急保障能力意义重大。为此，在调研分析的基础上，提出了管存控制的基本思路及技术框架。分析认为：①管存控制的技术关键是准确预测重点保供用户用气量及用气高峰时间、储气管道储气能力的确定及其储气量的合理分配、压力控制参数的确定；②管存控制技术能成功应用的客观条件是储气管道具有足够的储气能力、具有满足输量要求和管存控制要求的气量调配方案。以A地区2010年12月14-16日气温骤降为例，进一步阐述了具体的管存控制方案：用城市燃气用气量对气温的响应特性预测气温骤降时的用气量、用气时不均匀性确定储气管道储气时间；利用TGNET软件模拟确定控制压力；最终确定了气量调配方案，满足了管存控制要求。

Pipeline scheduling and management: A case history from the Sichuan-Chongqing Pipeline Network

The gas pipeline network in Sichuan and Chongqing areas, abbreviated as Sichuan Chongqing Pipeline Network, covers an extremely wide area, which brings about great difficulty in coordination of gas production, transportation and marketing. Thus, a temporary solution of emergency gas supply by use of dynamic supervision and control of pipeline inventory will be of great significance to improve the gas supply guarantee capacity and emergency scheduling of the Sichuan Chongqing Pipeline Network. In view of this, based on the investigation and analysis, the fundamental ideas and technical framework are presented for pipeline scheduling and inventory management. In conclusion, the essential of pipeline scheduling and inventory management is to accurately predict the gas volume of those important specially protected users and to determine the peak gas time, pressure control parameters, gas storage capacity of lines as well as its rational allocation. The objective condition for the successful application of pipeline inventory management relies on a good allocation and distribution program for ensuring the lines with enough gas storage capacity, meeting the needs of transportation and inventory control. With a case history from the district A during the temperature sudden drop times of Dec. 14 - 16, 2010, the detailed pipeline scheduling and inventory management is further explained. First, the gas consumption in the temperature sudden drop time was predicted by use of the response characteristic of a city's gas consumption to air temperature; the control pressure was determined by the simulation of the TGNET software; the gas volume allocation and distribution scheme was eventually determined to meet the requirement of pipeline inventory control.