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    • 48. 发明申请
    • SYSTEM AND CONTROL METHOD TO IMPROVE THE RELIABILITY AND RANGE OF MINERAL INSULATED ELECTRICAL CABLES
    • 提高矿物绝缘电缆可靠性和范围的系统和控制方法
    • US20160072280A1
    • 2016-03-10
    • US14480302
    • 2014-09-08
    • LEE JOSEPH BOURGEOIS, JR.
    • LEE JOSEPH BOURGEOIS, JR.
    • H02H9/04H02H9/00
    • E21B43/2401E21B36/04H02H7/226H02H9/005H02H9/045H02M1/12H02M1/126
    • Embodiments include a system, control process, and method for improving the reliability of mineral insulated electrical cables for use in oil and gas industry applications. The embodiments may include a PWM variable speed drive having an optimized operating frequency, a sine wave filter connected to an output of the drive and designed to mitigate reflective voltage wave spikes from the drive's PWM voltage pulses, a mineral insulated electrical heater cable connected to the filter, and an external controller for receiving voltage, current, and temperature feedback to create a voltage set point at which the drive operates. The embodiments may (i) mitigate common failure mechanisms of mineral insulated cables operating at a medium voltage level and in a temperature range of from 200° C. to 700° C.; (ii) extend the range of application of mineral insulated cables; and (iii) prevent high voltage spikes from causing damage to the insulant material of heater cables.
    • 实施例包括用于提高用于油气工业应用的矿物绝缘电缆的可靠性的系统,控制过程和方法。 这些实施例可以包括具有优化的工作频率的PWM变速驱动器,连接到驱动器的输出并被设计为减轻来自驱动器的PWM电压脉冲的反射电压波峰值的正弦波滤波器,连接到 滤波器和外部控制器,用于接收电压,电流和温度反馈,以创建驱动器运行的电压设定点。 这些实施例可以(i)减轻在中等电压水平和在200℃至700℃的温度范围内工作的矿物绝缘电缆的常见故障机理; (ii)延长矿物绝缘电缆的使用范围; 和(iii)防止高压尖峰对加热器电缆的绝缘材料造成损坏。
    • 50. 发明授权
    • Power supply controller
    • 电源控制器
    • US09042069B2
    • 2015-05-26
    • US13498040
    • 2010-09-24
    • Yutaka HiguchiSeiji Takahashi
    • Yutaka HiguchiSeiji Takahashi
    • H02H5/04H02H3/087H03K17/08H02M1/32H02H3/00H02H6/00H02H7/22
    • H02H3/087H02H6/005H02H7/226H02M1/32H02M2001/327H03K17/08
    • The power supply controller performs the power-supply-path protection operation to restrict power supply through the switch element if a value of temperature increase of the power supply path W with respect to the reference temperature To exceeds the temperature threshold value and remove the restriction if the temperature decreases to the temperature threshold value or lower. And the controller performs the switch protection operation to restrict the power supply through the switch element if the value of the flowing current exceeds the current threshold value and remove the restriction after the reference time H elapses. And also the controller adds the additional value F to the value of temperature increase on condition that the value of the flowing current exceeds the current threshold value in the power supply protection operation and compares a post-addition temperature to the temperature threshold value.
    • 如果供电路径W相对于参考温度To的温度升高的值超过温度阈值,则电源控制器执行电源路径保护操作以限制通过开关元件的电力供应,并且如果 温度降低到温度阈值或更低。 如果流过电流的值超过当前阈值,则控制器执行开关保护操作以限制开关元件的电源,并且在参考时间H过去之后消除限制。 另外,控制器在电源保护动作中流过的电流值超过电流阈值的情况下,将附加值F加到温度上升值,并将后加法温度与温度阈值进行比较。