抽油机超级电容储能系统

Supercapacitor energy storage system for pumping units

张中慧 郑强 刘晓玲 黄润晶 陈昭伟

ZHANG Zhonghui ZHENG Qiang LIU Xiaoling HUANG Runjing CHEN Zhaowei

中国石化胜利油田分公司石油工程技术研究院

Research Institute of Petroleum Engineering Technology, SINOPEC Shengli Oilfield Company, Dongying 25700, Shandong, China

针对抽油机系统平衡块难以维持完全平衡、倒发电现象造成电网污染、制动引起发热及能源浪费等问题，提出基于超级电容的抽油机储能系统整体方案，设计了超级电容模组、快速充放电单元、倒发电状态识别系统、保护系统等具体功能模块，在胜利油田3口试验井完成抽油机储能系统的现场试验分析。结果表明，超级电容为抽油机储能系统的优选储存介质，循环17万次后容量为251 F，容量保持率86.55%，满足抽油机储能系统使用需求；充电时采用ZVS移相软开关技术，功率器件处于0电压开通状态损耗最小；增加抽油机储能系统后，抽油机耗电量明显下降，3#抽油机的节电比例达到27.0%，每天节电量为27.11 kW · h，每年可节约电费6 829元。研究成果在充分利用抽油机倒发电能量、避免能量浪费等方面具有重要工程应用价值和显著经济效益，为后续推广应用抽油机节能工艺提供技术经验。

Addressing issues such as difficulty in maintaining complete balance of the balance block in the pumping unit system, grid pollution caused by reverse power generation, heating caused by braking, and energy waste, a comprehensive solution of energy storage system for pumping units based on super capacitor was proposed. Design of specific functional modules such as super capacitor modules, fast charge and discharge units, reverse power generation status identification systems as well as protection systems were innovated, and the field trial of energy storage system for pumping units was conducted in three wells in Shengli Oilfield. When super capacitors are determined as the preferred storage medium for the energy storage system used by oil pumping units, the field application shows the capacity remains at 251 F with a capacity retention rate of 86.55% after 170 000 cycles, meeting the demands for the energy storage system used by oil pumping units. During charging, ZVS phase-shift technology was employed, ensuring that power devices operate at a zero-voltage turn-on state, minimizing power losses. Following the addition of the energy storage system, the power consumption of the oil pumping units significantly decreased. Notably, the power savings for Pump No. 3 reached 27.0%, translating to a daily energy saving of 27.11 kW · h and an annual cost saving of RMB 6 829. This research plays significant role in making full use of energy reversely generated by the pumping unit and power saving, which provides valuable experience for the subsequent promotion and application of pumping unit energy-saving technologies.

10.13639/j.odpt.202311048