CN112198396B - 一种船舶电缆水树修复性能评估方法 - Google Patents

一种船舶电缆水树修复性能评估方法 Download PDF

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CN112198396B
CN112198396B CN202011079873.8A CN202011079873A CN112198396B CN 112198396 B CN112198396 B CN 112198396B CN 202011079873 A CN202011079873 A CN 202011079873A CN 112198396 B CN112198396 B CN 112198396B
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贾小平
谢宁宁
安连彤
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Guangdong Ocean University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
    • G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
    • G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/088—Aspects of digital computing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Abstract

本发明涉及一种船舶电缆水树修复性能评估方法，本发明首先将电缆终端改造打孔，然后在电缆的空隙上注入氮气排出电缆里的水分，再通过注入修复液对水树进行修复；最后通过泄漏电流测试、介质损耗角正切测试和绝缘电阻测试，分别计算泄漏电流因子α、介质损耗角正切因子β和绝缘电阻修复特征参数η。计算修复性能因子u，本发明能够评估水树的修复效果，保障了船舶电缆的供电可靠性。

Description

一种船舶电缆水树修复性能评估方法
技术领域
本发明属于船舶电缆水树修复领域，具体涉及一种船舶电缆水树修复性能评估方法。
背景技术
随着海洋经济的发展，船舶电缆应用越来越多，它具有诸多优点，如供电可靠性高，绝缘性能好，耐水和化学腐蚀性能良好等。船舶电缆运行环境恶劣，工作电压高、距离长，其机械和电气性能经常受到威胁，容易发生水树老化，从而导致其故障率更高，将会带来了巨大的经济损失。因此对船舶电缆的水树修复以及对水树修复性能进行评估是保障供电稳定的重要一环。
高效准确的对船舶电缆水树修复性能评估具有重要的工程意义，通过对水树修复性能进行评估，及时更换不达标的电缆，从而减少船舶电缆故障发生率。因此急需一种能够对船舶电缆水树修复性能评估方法，本方法为一种船舶电缆水树修复性能评估方法，该方法能够对电缆水树修复性能进行有效评估。
发明内容
本发明为一种船舶电缆水树修复性能评估方法，用于船舶电缆水树修复性能评估，具体包括以下步骤：
第一步：将电缆终端进行改造打孔，在电缆导体的空隙中注入干燥氮气排出水分，然后注入修复液，将电缆静置一段时间，使修复液与电缆中水树充分发生反应；
第二步：计算修复性能因子u
1)计算泄漏电流因子α
对修复后的电缆进行泄漏电流测试，定义偏差系数K如下所示：
Figure GDA0003445016630000011
其中ε1为修复前的泄漏电流，ε2为修复后的泄漏电流；
泄漏电流因子α的计算如下所示：
Figure GDA0003445016630000012
2)计算介质损耗角正切因子β
对修复后的电缆进行介质损耗角正切值测试，定义介质损耗角正切因子如下所示：
Figure GDA0003445016630000021
其中tanδ1为修复前的介质损耗角正切值，tanδ2为修复后的介质损耗角正切值；
3)计算绝缘电阻修复特征参数η
对修复后的电缆进行绝缘电阻测试，定义绝缘电阻修复特征参数如下所示：
Figure GDA0003445016630000022
其中λ1为修复前的绝缘电阻，λ2为修复后的绝缘电阻；
4)计算修复性能因子u
Figure GDA0003445016630000023
第三步：通过修复性能因子u对修复性能进行评估
若μ＜σ1，则电缆水树修复性能处于良好状态；
若σ1≤μ＜σ2，则电缆水树修复性能处于一般状态；
若μ≥σ2，则电缆水树修复性能处于较差状态。
其中σ1＝3.218，σ2＝21.526。
附图说明
图1是本发明涉及的一种船舶电缆水树修复性能评估方法的流程图。
具体实施方式
第一步：将电缆终端进行改造打孔，在电缆导体的空隙中注入干燥氮气排出水分，然后注入修复液，将电缆静置一段时间，使修复液与电缆中水树充分发生反应；
第二步：计算修复性能因子u
1)计算泄漏电流因子α
对修复后的电缆进行泄漏电流测试，定义偏差系数K如下所示：
Figure GDA0003445016630000031
其中ε1为修复前的泄漏电流，ε2为修复后的泄漏电流，单位为微安(uA)；
泄漏电流因子α的计算如下所示：
Figure GDA0003445016630000032
2)计算介质损耗角正切因子β
对修复后的电缆进行介质损耗角正切值测试，定义介质损耗角正切因子如下所示：
Figure GDA0003445016630000033
其中tanδ1为修复前的介质损耗角正切值，tanδ2为修复后的介质损耗角正切值；
3)计算绝缘电阻修复特征参数η
对修复后的电缆进行绝缘电阻测试，定义绝缘电阻修复特征参数如下所示：
Figure GDA0003445016630000034
其中λ1为修复前的绝缘电阻，λ2为修复后的绝缘电阻，单位为兆欧(MΩ)；
4)计算修复性能因子u
Figure GDA0003445016630000035
第三步：通过修复性能因子u对修复性能进行评
若μ＜σ1，则电缆水树修复性能处于良好状态；
若σ1≤μ＜σ2，则电缆水树修复性能处于一般状态；
若μ≥σ2，则电缆水树修复性能处于较差状态。
其中σ1＝3.218，σ2＝21.526。

Claims (1)

1.一种船舶电缆水树修复性能评估方法，其特征在于，包括以下步骤：
第一步：将电缆终端进行改造打孔，在电缆导体的空隙中注入干燥氮气排出水分，然后注入修复液，将电缆静置一段时间，使修复液与电缆中水树充分发生反应；
第二步：计算修复性能因子u
1)计算泄漏电流因子α
对修复后的电缆进行泄漏电流测试，定义偏差系数K如下所示：
Figure FDA0003445016620000011
其中ε1为修复前的泄漏电流，ε2为修复后的泄漏电流；
泄漏电流因子α的计算如下所示：
Figure FDA0003445016620000012
2)计算介质损耗角正切因子β
对修复后的电缆进行介质损耗角正切值测试，定义介质损耗角正切因子如下所示：
Figure FDA0003445016620000013
其中tanδ1为修复前的介质损耗角正切值，tanδ2为修复后的介质损耗角正切值；
3)计算绝缘电阻修复特征参数η
对修复后的电缆进行绝缘电阻测试，定义绝缘电阻修复特征参数如下所示：
Figure FDA0003445016620000014
其中λ1为修复前的绝缘电阻，λ2为修复后的绝缘电阻；
4)计算修复性能因子u
Figure FDA0003445016620000015
第三步：通过修复性能因子u对修复性能进行评估
若μ＜σ1，则电缆水树修复性能处于良好状态；
若σ1≤μ＜σ2，则电缆水树修复性能处于一般状态；
若μ≥σ2，则电缆水树修复性能处于较差状态；
其中σ1＝3.218,σ2＝21.526。
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