摘要
油田注水通常采用多泵并联的方式来提高注水量,但受注水量动态变化的影响,注水量与注水需求不易匹配,导致能量的浪费。变频技术因其简单方便、节能效果明显受到广泛应用,但不同的变频组合方案节能效果差异大,研究其最优变频组合方案,对油田节能降耗具有重要意义。以水泵变频特性模型为基础,依据水泵并联原理并采用极值法求解机组总功率模型,从而对不同变频组合方案进行理论上的节能分析,且通过实例分析其节能效果。结果表明,部分变频会导致变速泵在高扬程、低流量下运行,定速泵在过流量下运行;全变频同步调速是并联泵最优变频组合方案。全变频同步调速相比部分变频调速每年可实现经济效益54万元,节能潜力巨大,为油田并联泵机组的变频节能改造提供了依据。
Oilfield water injection usually adopts the method of parallel pumps to increase the water injection volume,but it is affected by the dynamic change of water injection volume,which results in the waste of energy.The frequency conversion technology is widely used due to its convenience and obvious energy saving effect.However,different frequency combination schemes have different energy-saving effects,so studying the optimal frequency combination scheme is of great significance for saving energy and reducing consumption of oilfields.Based on the water pump frequency characteristic model,the unit total power model is calculated through the parallel principle of water pumps and the extreme value method,the theoretical energy saving analysis of different frequency conversion combination schemes is carried out,and the energy saving effects are analyzed by examples.The results indicate that part-variable speed will cause the variable speed pump to operate under high lift and low flow rate and the constant speed pump to operate under excess flow;all-variable frequency synchronous speed control is the optimal frequency conversion scheme of parallel pumps.Compared with part-variable frequency control,all-variable frequency synchronous speed control can achieve the annual economic benefit of 540 000 yuan,having a great potential for energy saving and providing a basis for the frequency conversion transformation of oilfield parallel pump units.
出处
《油气田地面工程》
2018年第8期100-104,共5页
Oil-Gas Field Surface Engineering
基金
国家重点研发计划(2017YFC0805803)
国家自然科学基金(51674277)
关键词
油田注水
并联泵
变频
节能
改造
oilfield water injection
parallel pump
frequency conversion
energy saving
transformation
