Review of variable speed drive technology in beam pumping units for energy-saving

Tan, Chaodong; Feng, Zi‐Ming; Liu, Xiaolei; Fan, Jianchuang; Cui, Wei; Sun, Rui; Ma, Qingyang

doi:10.1016/j.egyr.2020.09.018

Cited by 20 publications

(12 citation statements)

References 25 publications

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“…The slip constant represents the percentage ratio difference value between the synchronous rotation of stator (ns) and rotor (nr) divided by the stator synchronous rotation (ns). The value of the rotor rotational speed (nr) is generally smaller than the stator (ns) [8].…”

Section: Resultsmentioning

confidence: 99%

The Characteristic of Variable Frequency Drive for Water Flow Control in the SFC Plant

Patrialova

Wardhana

Rahayu

et al. 2021

IJOE

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One of several techniques to control fluid flow-rate through a pump is using variable frequency drive. This paper presents how experiment be able to perceive the characteristic of variable frequency drive (VFD) to control water flow-rate in the Simulator Flow Control (SFC) plant. The SFC plant is developed for a fluid course learning simulator. The user would be able to set the desired value of frequency or flow-rate through a convenient interface. To provide it, the characteristic of VFD-frequencyto-flow-rate must be firstly observed, as reported in this paper. The fluid flow-rate control is designed without an electric valve, but using VFD to drive the 250 Watt water pump. In this first development, the SFC Plant successfully work with various water flow-rate from 2 Liter per minute until 20 Liter per minute by changing the frequency input of VFD. The water flow-rate was measured by manual rotameter, the flow sensor has not been applied yet in this first development. In this experiment, the VFD's frequency was set from 10 Hz to 36 Hz with 2 Hz intervals. Result showed that VFD frequency is proportional to water flow-rate. The higher frequency given to VFD, the faster rotational motor of water pump generated and then given rise to water flow-rate. Using linear graphic approach, the characteristic is shown through the linearity coefficient of 0,68 and constant value of 3.43. This characteristic value would be useful for open-loop-control and user interface programming in next step of development.

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Section: Resultsmentioning

confidence: 99%

The Characteristic of Variable Frequency Drive for Water Flow Control in the SFC Plant

Patrialova

Wardhana

Rahayu

et al. 2021

IJOE

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show abstract

“…In the healthy case, all bars of the rotor are in healthy condition. For the first fault status, the damage degree was simulated by drilling a 2 mm-diameter hole in a rotor bar, the depth of the hole (dp) was 1 4 of the bar height. In the second fault severity condition, the depth of the hole in the bar was increased to 1 2 of the bar height.…”

Section: Methodsmentioning

confidence: 99%

“…For the first fault status, the damage degree was simulated by drilling a 2 mm-diameter hole in a rotor bar, the depth of the hole (dp) was 1 4 of the bar height. In the second fault severity condition, the depth of the hole in the bar was increased to 1 2 of the bar height. In the third fault severity condition, the depth of the hole was increased to 3 4 of the bar height.…”

Section: Methodsmentioning

confidence: 99%

“…The use of induction motors (IMs) in industrial applications with variable speed systems is widespread because they are more reliable, versatile, and efficient than line-fed machines [1]. High-performance IMs are considered robust machines, but they require reliable condition monitoring systems to avoid unprogrammed stops in production lines and reduce maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

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Early Detection of Broken Rotor Bars in Inverter-Fed Induction Motors Using Speed Analysis of Startup Transients

et al. 2021

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The fault diagnosis of electrical machines during startup transients has received increasing attention regarding the possibility of detecting faults early. Induction motors are no exception, and motor current signature analysis has become one of the most popular techniques for determining the condition of various motor components. However, in the case of inverter powered systems, the condition of a motor is difficult to determine from the stator current because fault signatures could overlap with other signatures produced by the inverter, low-slip operation, load oscillations, and other non-stationary conditions. This paper presents a speed signature analysis methodology for a reliable broken rotor bar diagnosis in inverter-fed induction motors. The proposed fault detection is based on tracking the speed fault signature in the time-frequency domain. As a result, different fault severity levels and load oscillations can be identified. The promising results show that this technique can be a good complement to the classic analysis of current signature analysis and reveals a high potential to overcome some of its drawbacks.

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“…The automated and closed-loop control algorithm reduced the operator's demand to monitor the day-to-day production. A model, accounting for the system dynamics and the beam pumping unit under variable speed driving conditions, has been shown by Chaodong et al [16]. Their optimization criterion is the reduction of power consumption.…”

mentioning

confidence: 99%

Sucker rod pump frequency-elastic drive mode development – from the numerical model to the field test

Langbauer¹,

Langbauer²,

Frühwirth³

et al. 2021

Liq., gas. energy resour.

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A frequency-elastic drive mode for a sucker rod pumping system is introduced to reduce its polished rod peak loads and the total energy consumption. Numerical modeling and an extensive field test verify the concept. The frequency-elastic drive mode is a software solution for variable speed drive systems, which can be applied in the controller and does not require any hardware adjustments. The novel drive mode adjusts the set frequency, sent by the controller to the frequency converter, depending on the actual power requirements. An increase in power consumption results in a reduction of the set frequency, which is proportional to the power consumption increase. A reduction in power consumption results in the opposite effect to achieve a similar pumping speed as for regular operation. The frequency-elastic drive mode is simulated by a numerical model, which covers the entire pumping system. An extensive field test was performed to verify the concept and the numerical model. The simulation and the field test have confirmed the concept of the frequency-elastic drive mode and quantified its saving potential. The evaluation of the field test has shown that the energy-saving potential can reach five percent. In addition, a peak polished rod load reduction of up to three percent was seen. At the tested pumping system the frequency elastic drive mode under optimized parameters yields the best results in terms of total energy savings in the pumping speed range between 7 to 10 strokes per minute. A downhole system efficiency increase was seen for any pumping speed. The numerical model matches the field test data and allows the performance prediction of the novel drive mode for changed parameters and wellbore configurations without extensive field testing. The novelty of the presented paper is the concept of the frequency-elastic drive mode, which is a pure software solution for variable speed drive sucker rod pumping systems. The holistic model includes the entire pumping system and matches the field test data at remarkable accuracy.

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Review of variable speed drive technology in beam pumping units for energy-saving

Cited by 20 publications

References 25 publications

The Characteristic of Variable Frequency Drive for Water Flow Control in the SFC Plant

The Characteristic of Variable Frequency Drive for Water Flow Control in the SFC Plant

Early Detection of Broken Rotor Bars in Inverter-Fed Induction Motors Using Speed Analysis of Startup Transients

Sucker rod pump frequency-elastic drive mode development – from the numerical model to the field test

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