CN106885936B - Divide the hardened structure discharge current measuring device of stick-of domain combined method based on insulation - Google Patents

Divide the hardened structure discharge current measuring device of stick-of domain combined method based on insulation Download PDF

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CN106885936B
CN106885936B CN201710048784.9A CN201710048784A CN106885936B CN 106885936 B CN106885936 B CN 106885936B CN 201710048784 A CN201710048784 A CN 201710048784A CN 106885936 B CN106885936 B CN 106885936B
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current
discharge
plate
insulation
voltage
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CN106885936A (en
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卢斌先
孙洪宇
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North China Electric Power University
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/10—Measuring sum, difference or ratio
    • 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
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • 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
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

The invention discloses a kind of hardened structure discharge current measuring devices of stick-based on insulation point domain combined method for belonging to corona discharge field of measuring technique.Multiple concentric circular regions are divided on anode plate, each region is separated with insulating materials；It is grounded below each insulation domain by noninductive resistance, ohmically voltage passes through the coaxial cable matched and connect with oscillograph.The present invention can analyze space corona current distribution character, and can explain the situation that emulation and experimental waveform cannot coincide well.

Description

基于绝缘分域组合法的棒-板结构放电电流测量装置Measuring device for discharge current with rod-plate structure based on insulation subdivision combination method

技术领域technical field

本发明属于电晕放电测量技术领域，特别涉及一种基于绝缘分域组合法的棒-板结构放电电流测量装置。The invention belongs to the technical field of corona discharge measurement, and in particular relates to a rod-plate structure discharge current measurement device based on an insulation divisional combination method.

背景技术Background technique

气体放电的形式是多种多样的，其中电晕放电是外加电场达到某种强度时，气体介质在该场中所特有的局部自持放电现象，也称为汤森德放电。在这个区域内，被电离的气体分子可以被视为自由移动的带电粒子，那么带电粒子的集合体就可称为等离子体。就平均效应来说，它在宏观上呈电中性，但是其内部有着复杂的物理化学反应过程，其中最重要便是带电粒子与中性气体分子之间的碰撞。由于棒-板电场的不均匀性，电离过程被局限在小曲率电极附近很小的区域内，该区域可称之为“起晕区域”。而其它电场强度较低的区域主要发生的是以电子迁移为主的吸附、复合现象，该区域则称之为外围区域。对于负电晕放电，当施加电压逐渐升高时，首先可以观测到的是一系列连续规则的电流脉冲，也称为特里切尔脉冲；随着电压的继续升高，脉冲逐渐消失，此时放电转入无脉冲电晕阶段；若电压持续升高，那么整个放电间隙将被击穿，产生火花放电。因此可以通过分析电晕放电波形(即特里切尔脉冲)的幅值、频率等参数来分析等离子体内部的粒子输运过程。There are various forms of gas discharge, among which corona discharge is a partial self-sustained discharge phenomenon unique to the gas medium in the field when the external electric field reaches a certain intensity, also known as Townsend discharge. In this region, the ionized gas molecules can be regarded as free moving charged particles, then the collection of charged particles can be called plasma. As far as the average effect is concerned, it is electrically neutral macroscopically, but there are complex physical and chemical reaction processes inside it, the most important of which is the collision between charged particles and neutral gas molecules. Due to the inhomogeneity of the rod-plate electric field, the ionization process is confined to a small area near the electrode with small curvature, which can be called the "halo initiation area". In other regions with lower electric field intensity, the phenomenon of adsorption and recombination mainly occurs by electron migration, and this region is called the peripheral region. For negative corona discharge, when the applied voltage is gradually increased, the first thing that can be observed is a series of continuous and regular current pulses, also called Trichel pulses; as the voltage continues to increase, the pulses gradually disappear, at this time The discharge turns into a non-pulse corona stage; if the voltage continues to rise, the entire discharge gap will be broken down, resulting in spark discharge. Therefore, the particle transport process inside the plasma can be analyzed by analyzing the parameters such as the amplitude and frequency of the corona discharge waveform (that is, the Trichel pulse).

目前许多学者采用测量棒-板模型中的板极电流来确定特里切尔脉冲，该种方法可以较为准确地测量出整体区域内的放电电流，而不能得到不同放电域内的电子电流。At present, many scholars use the plate current in the rod-plate model to determine the Trichel pulse. This method can accurately measure the discharge current in the entire area, but cannot obtain the electron current in different discharge domains.

发明内容Contents of the invention

本发明的目的是提出一种基于绝缘分域组合法的棒-板放电电流测量装置，其特征在于，所述棒-板放电电流测量装置为在阳极板2上划分多个同心圆区域，各个区域用绝缘材料1隔开，在中心圆区域放置高压棒4，在各同心圆区域内固定板电极3；各板电极3上串接一个无感电阻,并接地。The purpose of the present invention is to propose a rod-plate discharge current measuring device based on the insulation subdivision combination method, characterized in that, the rod-plate discharge current measuring device is divided into a plurality of concentric circle areas on the anode plate 2, each The areas are separated by insulating material 1, and high-voltage rods 4 are placed in the central circle area, and plate electrodes 3 are fixed in each concentric circle area; each plate electrode 3 is connected in series with a non-inductive resistor and grounded.

所述棒-板放电电流测量的具体步骤如下：The specific steps of the rod-plate discharge current measurement are as follows:

1)在阳极板上划分多个同心圆区域，各个区域用绝缘材料隔开；每个绝缘域下方经过无感电阻接地，电阻上的电压通过匹配好的同轴电缆与示波器连接，1) Divide multiple concentric circle areas on the anode plate, and each area is separated by insulating material; each insulating area is grounded through a non-inductive resistor, and the voltage on the resistor is connected to the oscilloscope through a matched coaxial cable.

2)在高压棒4上施加高电压，直到其达到起晕电压为止，此时电晕放电开始发生；从而测量出各个位置的电晕电流。2) Apply a high voltage on the high-voltage rod 4 until it reaches the corona inception voltage, at which time corona discharge begins to occur; thereby measuring the corona current at each position.

3)步骤2)得到各个绝缘域上的离子电流与位移电流，同时这些电流之和即为总电晕电流值。然后测量不同区域内的放电电流，其中总电流由这些分电流相加得到。3) In step 2), the ion current and displacement current on each insulating domain are obtained, and the sum of these currents is the total corona current value. Then measure the discharge current in different areas, where the total current is obtained by adding these partial currents.

4)为了简化测量，在阳极板的每个区域的中心连接一根导线，并通过限流电阻接地，则通过测量每个分域上连接限流电阻的电压，再求出该电压与电阻的比值即可以得出通过该区域的放电电流。4) In order to simplify the measurement, a wire is connected to the center of each area of the anode plate, and grounded through the current limiting resistor, then by measuring the voltage connected to the current limiting resistor on each sub-area, the relationship between the voltage and the resistance is calculated The ratio gives the discharge current through that region.

本发明的有益效果是应用该方法可以分析空间电晕电流分布特性，并可以很好地解释仿真与实验波形不能吻合的情况。The beneficial effect of the invention is that the method can be used to analyze the distribution characteristics of the corona current in space, and can well explain the situation that the waveforms of simulation and experiments cannot be matched.

附图说明Description of drawings

图1为阳极板上划分多个同心圆区域示意图。Fig. 1 is a schematic diagram of dividing multiple concentric circle regions on the anode plate.

图2为放电电流测量装置示意图。Fig. 2 is a schematic diagram of a discharge current measuring device.

图3为放电电流测量结果曲线图。Figure 3 is a graph of the discharge current measurement results.

具体实施方式Detailed ways

本发明提出一种基于绝缘分域组合法的棒-板放电电流测量装置，下面结合附图予以说明。The present invention proposes a rod-plate discharge current measuring device based on the insulation subdivision combination method, which will be described below with reference to the accompanying drawings.

图1所示为阳极板上划分多个同心圆区域示意图。图2所示为放电电流测量装置示意图。Fig. 1 shows a schematic diagram of dividing a plurality of concentric circle regions on the anode plate. Figure 2 is a schematic diagram of the discharge current measurement device.

图1、图2所示的棒-板放电电流测量装置为在阳极板2上划分多个同心圆区域，各个区域用绝缘材料1隔开，在中心圆区域放置高压棒4，在各同心圆区域内固定板电极3；各板电极3上串接一个无感电阻,并接地；无感电阻上的电压通过匹配好的同轴电缆与示波器连接。The rod-plate discharge current measuring device shown in Fig. 1 and Fig. 2 is to divide a plurality of concentric circle areas on the anode plate 2, and each area is separated by an insulating material 1, and a high voltage rod 4 is placed in the central circle area, and a high voltage rod 4 is placed in each concentric circle area. The plate electrodes 3 are fixed in the area; each plate electrode 3 is connected in series with a non-inductive resistor and grounded; the voltage on the non-inductive resistor is connected to the oscilloscope through a matched coaxial cable.

所述棒-板放电电流测量的具体步骤如下：The specific steps of the rod-plate discharge current measurement are as follows:

1)在阳极板上划分多个同心圆区域，各个区域用绝缘材料隔开；每个绝缘域下方经过无感电阻接地，电阻上的电压通过匹配好的同轴电缆与示波器连接，1) Divide multiple concentric circle areas on the anode plate, and each area is separated by insulating material; each insulating area is grounded through a non-inductive resistor, and the voltage on the resistor is connected to the oscilloscope through a matched coaxial cable.

2)在高压棒4上施加高电压，直到其达到起晕电压为止，此时电晕放电开始发生；从而测量出各个位置的电晕电流。2) Apply a high voltage on the high-voltage rod 4 until it reaches the corona inception voltage, at which time corona discharge begins to occur; thereby measuring the corona current at each position.

3)步骤2)得到各个绝缘域上的离子电流与位移电流，同时这些电流之和即为总电晕电流值。然后测量不同区域内的放电电流(如图3所示)，其中总电流由这些分电流相加得到。3) In step 2), the ion current and displacement current on each insulating domain are obtained, and the sum of these currents is the total corona current value. Then measure the discharge current in different areas (as shown in Figure 3), where the total current is obtained by adding these partial currents.

4)为了简化测量，在阳极板的每个区域的中心连接一根导线，并通过限流电阻接地，则通过测量每个分域上连接限流电阻的电压，再求出该电压与电阻的比值即可以得出通过该区域的放电电流。4) In order to simplify the measurement, a wire is connected to the center of each area of the anode plate, and grounded through the current limiting resistor, then by measuring the voltage connected to the current limiting resistor on each sub-area, the relationship between the voltage and the resistance is calculated The ratio gives the discharge current through that region.

Claims (1)

1. a kind of stick-plate discharge current measuring device measurement method for dividing domain combined method based on insulation, the stick-plate electric discharge electricity Flow measuring apparatus is that multiple concentric circular regions are divided on anode plate (2), and each region is separated with insulating materials (1), at center High pressure bar (4) is placed in circle region, in each concentric circular regions internal fixation plate electrode (3)；One is concatenated on each plate electrode (3) without electrification It hinders (5), and is grounded；It is characterized in that, specific step is as follows for the measurement of plate discharge current for the stick-:
1) multiple concentric circular regions are divided on anode plate, each region is separated with insulating materials；Pass through below each insulation domain Noninductive resistance ground connection, ohmically voltage pass through the coaxial cable matched and connect with oscillograph,
2) apply high voltage on high pressure bar (4), until it reaches discharge inception voltage, corona discharge takes place at this time；From And measure the corona current of each position；
3) step 2) obtains the ionic current and displacement current on each insulation domain, while the sum of these electric currents are total corona electricity Flow valuve；Then the discharge current in different zones is measured, wherein total current divides electric current to be added to obtain by these；It is surveyed to simplify Amount connects a conducting wire at the center in each region of anode plate, and is grounded by current-limiting resistance, then each divides domain by measurement The voltage of upper connection current-limiting resistance, then find out the ratio of the voltage and current-limiting resistance and can obtain electric discharge electricity by the region Stream.
CN201710048784.9A 2017-01-22 2017-01-22 Divide the hardened structure discharge current measuring device of stick-of domain combined method based on insulation Expired - Fee Related CN106885936B (en)

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Citations (6)

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Publication number Priority date Publication date Assignee Title
FR2749986A1 (en) * 1996-06-14 1997-12-19 Electricite De France APPARATUS FOR DETECTING INSULATION FAILURE OF A CONNECTED DEVICE IN AN ELECTRICAL POWER DISTRIBUTION OR TRANSPORT NETWORK AND CORRESPONDING DETECTION METHOD
CN201096875Y (en) * 2007-09-18 2008-08-06 比亚迪股份有限公司 Fuel cell current measuring circuit
CN202840243U (en) * 2012-09-18 2013-03-27 杭州天明环保工程有限公司 Ionic wind air flow accelerating device and electric current density testing device thereof
CN103823098A (en) * 2014-03-19 2014-05-28 上海电力学院 Pre-discharge current detection device
CN104166043A (en) * 2014-08-12 2014-11-26 国网上海市电力公司 Non-inductive pulse current detection device
CN106093537A (en) * 2016-07-26 2016-11-09 河北大学 High pressure electrostatic separator roll surface real-time current density measuring equipment and measuring method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101839938A (en) * 2010-04-15 2010-09-22 西安爱邦电磁技术有限责任公司 Method for testing airplane model lightning current distribution by utilizing thermal infrared imager
US20150098161A1 (en) * 2013-10-09 2015-04-09 Hamilton Sundstrand Corporation Integrated corona fault detection

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2749986A1 (en) * 1996-06-14 1997-12-19 Electricite De France APPARATUS FOR DETECTING INSULATION FAILURE OF A CONNECTED DEVICE IN AN ELECTRICAL POWER DISTRIBUTION OR TRANSPORT NETWORK AND CORRESPONDING DETECTION METHOD
CN201096875Y (en) * 2007-09-18 2008-08-06 比亚迪股份有限公司 Fuel cell current measuring circuit
CN202840243U (en) * 2012-09-18 2013-03-27 杭州天明环保工程有限公司 Ionic wind air flow accelerating device and electric current density testing device thereof
CN103823098A (en) * 2014-03-19 2014-05-28 上海电力学院 Pre-discharge current detection device
CN104166043A (en) * 2014-08-12 2014-11-26 国网上海市电力公司 Non-inductive pulse current detection device
CN106093537A (en) * 2016-07-26 2016-11-09 河北大学 High pressure electrostatic separator roll surface real-time current density measuring equipment and measuring method

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