CN109298231B - Method and device for current detection of resonant capacitor of arc suppression coil - Google Patents
Method and device for current detection of resonant capacitor of arc suppression coil Download PDFInfo
- Publication number
- CN109298231B CN109298231B CN201811230963.5A CN201811230963A CN109298231B CN 109298231 B CN109298231 B CN 109298231B CN 201811230963 A CN201811230963 A CN 201811230963A CN 109298231 B CN109298231 B CN 109298231B
- Authority
- CN
- China
- Prior art keywords
- arc suppression
- suppression coil
- current
- gear
- resonant capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001629 suppression Effects 0.000 title claims abstract description 124
- 239000003990 capacitor Substances 0.000 title claims abstract description 77
- 238000001514 detection method Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 51
- 238000004590 computer program Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 abstract description 14
- 238000005259 measurement Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000009774 resonance method Methods 0.000 description 1
Images
Classifications
-
- 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
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
本发明提供一种消弧线圈谐振电容的电流检测方法和装置，其中判断方法包括如下步骤：检测消弧线圈处于各档位时的位移电压，确定位移电压最大时所对应的档位，设该档位为n档；检测消弧线圈处于n‑1档时消弧线圈的电流和处于n+1档时消弧线圈的电流；计算谐振电容的电流，判断该电流是否在消弧线圈处于n‑1档时消弧线圈的电流和处于n+1档时消弧线圈的电流之间，如果不在，则重新调档计算谐振电容的电流。本发明提供的技术方案，当计算出谐振电容的电流后，验证该电流是否在根据各档位位移电压所确定的取值范围内，从而对计算结果的准确性进行判断，提高检测结果的可靠性。
The present invention provides a current detection method and device for an arc suppression coil resonance capacitor, wherein the judgment method includes the following steps: detecting the displacement voltage of the arc suppression coil in each gear position, determining the gear position corresponding to the maximum displacement voltage, and setting the The gear is n gear; detect the current of the arc suppression coil when the arc suppression coil is in n-1 gear and the current of the arc suppression coil when it is in n+1 gear; calculate the current of the resonant capacitor, and judge whether the current is in the n Between the current of the arc suppression coil at ‑1 gear and the current of the arc suppression coil at n+1 gear, if it is not there, re-adjust the gear to calculate the current of the resonant capacitor. According to the technical scheme provided by the present invention, after calculating the current of the resonant capacitor, verify whether the current is within the value range determined according to the displacement voltage of each gear, so as to judge the accuracy of the calculation result and improve the reliability of the detection result. sex.
Description
技术领域technical field
本发明属于谐振电容的电流测量技术领域，具体涉及一种消弧线圈谐振电容的电流检测方法和装置。The invention belongs to the technical field of current measurement of resonant capacitors, and in particular relates to a current detection method and device for resonant capacitors of arc suppression coils.
背景技术Background technique
近年来，电网中电缆线路所占的比例越来越高，配电网对地电容的电流大大增加。为了使电网单相接地故障时所产生的接地电弧自行熄灭，目前配电网多采用中性点经消弧线圈接地的方式进行灭弧。消弧线圈的工作原理为：在发生单相接地故障时，消弧线圈与配电网对地电容构成并联谐振回路，将配电网对地电容作为谐振回路中的谐振电容，使电感电流与配电网对地电容的电流互相抵消，从而减小故障点电流，保证接地电弧可靠自熄，以提高电网运行的可靠性并保证供电的连续性。In recent years, the proportion of cable lines in the power grid has become higher and higher, and the current of the distribution network to the ground capacitance has greatly increased. In order to extinguish the grounding arc generated by the single-phase grounding fault of the power grid, the current distribution network mostly adopts the method of grounding the neutral point through the arc suppression coil to extinguish the arc. The working principle of the arc suppression coil is: when a single-phase ground fault occurs, the arc suppression coil and the distribution network-to-ground capacitance form a parallel resonant circuit, and the distribution network-to-ground capacitance is used as the resonant capacitor in the resonant circuit, so that the inductance current is equal to The currents of the ground capacitors of the distribution network cancel each other, thereby reducing the current at the fault point and ensuring the reliable self-extinguishing of the ground arc, so as to improve the reliability of the power grid operation and ensure the continuity of the power supply.
目前采用消弧线圈接地的方式进行灭弧时，如图1所示，利用可调的消弧线圈Lx和谐振电容Cx串联形成谐振电路。但是随着电缆线路比例的升高，电网不对称度进一步下降，特别是变电站投运初期，因负荷较小，位移电压往往在10V以下，致使常规的测量电容电流的方法测量精度降低。At present, when the arc extinguishing coil is grounded for arc extinguishing, as shown in FIG. 1 , a resonant circuit is formed by using an adjustable arc extinguishing coil Lx and a resonance capacitor Cx in series. However, with the increase of the proportion of cable lines, the asymmetry of the power grid is further reduced, especially in the initial stage of operation of the substation, due to the small load, the displacement voltage is often below 10V, which reduces the measurement accuracy of the conventional method of measuring capacitive current.
虽然现有技术中有两点法、谐振法等能够计算出谐振电容的电流，但是不能够对计算结果的准确性进行验证，造成对谐振电容电流计算结果可靠性较差的问题。Although the two-point method and the resonance method in the prior art can calculate the current of the resonant capacitor, the accuracy of the calculation result cannot be verified, resulting in the problem of poor reliability of the calculation result of the resonant capacitor current.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种消弧线圈谐振电容的电流检测方法，用于解决现有技术中由于不能对谐振电容电流计算结果进行验证而导致计算结果可靠性较差的问题；相应的，本发明还提供了一种消弧线圈谐振电容的电流检测装置，用于解决现有技术中由于不能对谐振电容电流计算结果进行验证而导致计算结果可靠性较差的问题。The purpose of the present invention is to provide a current detection method of the resonant capacitor of the arc suppression coil, which is used to solve the problem of poor reliability of the calculation result due to the inability to verify the current calculation result of the resonant capacitor in the prior art; The invention also provides a current detection device for the resonant capacitor of the arc suppression coil, which is used to solve the problem of poor reliability of the calculation result due to the inability to verify the resonant capacitor current calculation result in the prior art.
为实现上述目的，本发明提供的技术方案是：For achieving the above object, the technical scheme provided by the present invention is:
一种消弧线圈谐振电容的电流检测方法，包括如下步骤：A current detection method for a resonant capacitor of an arc suppression coil, comprising the following steps:
检测消弧线圈处于各档位时的位移电压，确定位移电压最大时所对应的档位，设该档位为n档；Detect the displacement voltage of the arc suppression coil in each gear position, determine the gear position corresponding to the maximum displacement voltage, and set the gear position as n gear;
检测消弧线圈处于n-1档时消弧线圈的电流和处于n+1档时消弧线圈的电流；Detect the current of the arc suppression coil when the arc suppression coil is in n-1 gear and the current of the arc suppression coil when it is in n+1 gear;
计算谐振电容的电流，判断该电流是否在消弧线圈处于n-1档时消弧线圈的电流和处于n+1档时消弧线圈的电流之间，如果不在，则重新调档计算谐振电容的电流。Calculate the current of the resonant capacitor, and judge whether the current is between the current of the arc suppression coil when the arc suppression coil is in the n-1 gear and the current of the arc suppression coil when the arc suppression coil is in the n+1 gear. If not, re-adjust the gear to calculate the resonant capacitor. the current.
本发明提供的技术方案，当计算出谐振电容的电流后，验证该电流是否在根据各档位位移电压所确定的取值范围内，从而对计算结果的准确性进行判断，提高检测结果的可靠性。According to the technical scheme provided by the present invention, after calculating the current of the resonant capacitor, verify whether the current is within the value range determined according to the displacement voltage of each gear, so as to judge the accuracy of the calculation result and improve the reliability of the detection result. sex.
进一步的，计算谐振电容的电流包括如下步骤：Further, calculating the current of the resonant capacitor includes the following steps:
根据消弧线圈为大于n档的两个连续档位时的位移电压或者消弧线圈为小于n档的两个连续档位时的位移电压计算谐振电容的电流。Calculate the current of the resonant capacitor according to the displacement voltage when the arc suppression coil is in two continuous gears greater than n gears or the displacement voltage when the arc suppression coil is in two continuous gears less than n gears.
采用两点法计算谐振电容的电流，计算过程比较简单，计算结果比较准确。Using the two-point method to calculate the current of the resonant capacitor, the calculation process is relatively simple, and the calculation results are relatively accurate.
进一步的，设消弧线圈为大于n档的两个连续档位时的位移电压或者消弧线圈为小于n档的两个连续档位时的位移电压分别为U1和U2，则谐振电容的电流为：Further, suppose that the displacement voltage of the arc suppression coil when the arc suppression coil is two continuous gears greater than n gears or the displacement voltage of the arc suppression coil when the arc suppression coil is two continuous gears less than n gears are U 1 and U 2 respectively, then the resonant capacitor The current is:
I＝(U1*I1+U2*I2)/(U1+U2)。I=(U 1 *I 1 +U 2 *I 2 )/(U 1 +U 2 ).
进一步的，如果消弧线圈降到最低档或者升到最高档时位移电压没有达到最大值，则判断为谐振电容的电流超出消弧线圈的补偿范围。Further, if the displacement voltage does not reach the maximum value when the arc suppression coil is lowered to the lowest gear or raised to the highest gear, it is determined that the current of the resonant capacitor exceeds the compensation range of the arc suppression coil.
当消弧线圈降到最低档或者升到最高档时的位移电压没有达到最大值，则可知谐振电容的电流超出消弧线圈的补偿范围，增加此判断步骤能够进一步的提高对消弧线圈谐振电容检测的准确性。When the displacement voltage of the arc suppression coil is lowered to the lowest gear or raised to the highest gear, the displacement voltage does not reach the maximum value, it can be known that the current of the resonant capacitor exceeds the compensation range of the arc suppression coil. Adding this judgment step can further improve the resonant capacitance of the arc suppression coil. detection accuracy.
一种消弧线圈谐振电容的电流准确性判断装置，包括处理器和存储器，所述存储器上存储有用于在处理器上执行的计算机程序；所述处理器执行所述计算机程序时执行如下步骤：A current accuracy judging device for a resonant capacitor of an arc suppression coil, comprising a processor and a memory, wherein the memory stores a computer program for execution on the processor; the processor executes the following steps when executing the computer program:
检测消弧线圈处于各档位时的位移电压，确定位移电压最大时所对应的档位，设该档位为n档；Detect the displacement voltage of the arc suppression coil in each gear position, determine the gear position corresponding to the maximum displacement voltage, and set the gear position as n gear;
检测消弧线圈处于n-1档时消弧线圈的电流和处于n+1档时消弧线圈的电流；Detect the current of the arc suppression coil when the arc suppression coil is in n-1 gear and the current of the arc suppression coil when it is in n+1 gear;
计算谐振电容的电流，判断该电流是否在消弧线圈处于n-1档时消弧线圈的电流和处于n+1档时消弧线圈的电流之间，如果不在，则重新调档计算谐振电容的电流。Calculate the current of the resonant capacitor, and judge whether the current is between the current of the arc suppression coil when the arc suppression coil is in the n-1 gear and the current of the arc suppression coil when the arc suppression coil is in the n+1 gear. If not, re-adjust the gear to calculate the resonant capacitor. the current.
本发明提供的技术方案，当计算出谐振电容的电流后，验证该电流是否在根据各档位位移电压所确定的取值范围内，从而对计算结果的准确性进行判断，提高检测结果的可靠性。According to the technical scheme provided by the present invention, after calculating the current of the resonant capacitor, verify whether the current is within the value range determined according to the displacement voltage of each gear, so as to judge the accuracy of the calculation result and improve the reliability of the detection result. sex.
进一步的，计算谐振电容的电流包括如下步骤：Further, calculating the current of the resonant capacitor includes the following steps:
根据消弧线圈为大于n档的两个连续档位时的位移电压或者消弧线圈为小于n档的两个连续档位时的位移电压计算谐振电容的电流。Calculate the current of the resonant capacitor according to the displacement voltage when the arc suppression coil is in two continuous gears greater than n gears or the displacement voltage when the arc suppression coil is in two continuous gears less than n gears.
采用两点法计算谐振电容的电流，计算过程比较简单，计算结果比较准确。Using the two-point method to calculate the current of the resonant capacitor, the calculation process is relatively simple, and the calculation results are relatively accurate.
进一步的，设消弧线圈为大于n档的两个连续档位时的位移电压或者消弧线圈为小于n档的两个连续档位时的位移电压分别为U1和U2，则谐振电容的电流为：Further, suppose that the displacement voltage of the arc suppression coil when the arc suppression coil is two continuous gears greater than n gears or the displacement voltage of the arc suppression coil when the arc suppression coil is two continuous gears less than n gears are U 1 and U 2 respectively, then the resonant capacitor The current is:
I＝(U1*I1+U2*I2)/(U1+U2)。I=(U 1 *I 1 +U 2 *I 2 )/(U 1 +U 2 ).
进一步的，如果消弧线圈降到最低档或者升到最高档时位移电压没有达到最大值，则判断为谐振电容的电流超出消弧线圈的补偿范围。Further, if the displacement voltage does not reach the maximum value when the arc suppression coil is lowered to the lowest gear or raised to the highest gear, it is determined that the current of the resonant capacitor exceeds the compensation range of the arc suppression coil.
当消弧线圈降到最低档或者升到最高档时的位移电压没有达到最大值，则可知谐振电容的电流超出消弧线圈的补偿范围，增加此判断步骤能够进一步的提高对消弧线圈谐振电容检测的准确性。When the displacement voltage of the arc suppression coil is lowered to the lowest gear or raised to the highest gear, the displacement voltage does not reach the maximum value, it can be known that the current of the resonant capacitor exceeds the compensation range of the arc suppression coil. Adding this judgment step can further improve the resonant capacitance of the arc suppression coil. detection accuracy.
附图说明Description of drawings
图1为现有技术中消弧线圈的谐振电路；Fig. 1 is the resonant circuit of the arc suppression coil in the prior art;
图2为本发明方法实施例中消弧线圈档位与位移电压之间的关系图。FIG. 2 is a diagram showing the relationship between the position of the arc suppression coil and the displacement voltage in the embodiment of the method of the present invention.
具体实施方式Detailed ways
下面结合具体实施方式对本发明的技术方案作进一步说明。The technical solutions of the present invention will be further described below in conjunction with specific embodiments.
方法实施例：Method example:
本实施例提供一种消弧线圈谐振电容的电流检测方法，用于对灭弧线圈方式中谐振电容的电流值进行检测，并对检测结果的准确性进行判断，以提高对谐振电容电流检测结果的可靠性。This embodiment provides a current detection method for the resonance capacitor of an arc extinguishing coil, which is used to detect the current value of the resonance capacitor in the arc extinguishing coil mode, and judge the accuracy of the detection result, so as to improve the detection of the current of the resonance capacitor. reliability of results.
本实施例所提供的消弧线圈谐振电容的电流检测方法，包括如下步骤：The current detection method for the resonant capacitor of the arc suppression coil provided by this embodiment includes the following steps:
检测消弧线圈处于各档位时的位移电压，确定位移电压最大时所对应的档位，设该档位为n；Detect the displacement voltage of the arc suppression coil in each gear, determine the gear corresponding to the maximum displacement voltage, and set the gear as n;
检测消弧线圈处于n-1档时消弧线圈的电流和处于n+1档时消弧线圈的电流；Detect the current of the arc suppression coil when the arc suppression coil is in n-1 gear and the current of the arc suppression coil when it is in n+1 gear;
计算谐振电容的电流，判断该电流是否在消弧线圈处于n-1档时消弧线圈的电流和处于n+1档时消弧线圈的电流之间；Calculate the current of the resonant capacitor, and judge whether the current is between the current of the arc suppression coil when the arc suppression coil is in n-1 gear and the current of the arc suppression coil when it is in n+1 gear;
如果在，则该谐振电容的电流准确，否则判断为该谐振电容的电流不准确；If it is, the current of the resonant capacitor is accurate, otherwise it is judged that the current of the resonant capacitor is inaccurate;
如果计算出的谐振电容不准确，则重新调档计算谐振电容的电流。If the calculated resonant capacitance is inaccurate, rescale the calculated resonant capacitor current.
本实施例中采用两档法计算谐振电容的电流，具体为：In this embodiment, the two-stage method is used to calculate the current of the resonant capacitor, specifically:
调节消弧线圈的档位，并检测消弧线圈处于各档位时的位移电压，根据位移电压的变化规律找到谐振点，如图2所示，位移电压达到最大时消弧线圈的档位为n，则在图2中位移电压的最大值为U0，U3为消弧线圈处于大于n档的一个档位时的位移电压；Adjust the gear position of the arc suppression coil, and detect the displacement voltage of the arc suppression coil when it is in each gear position, and find the resonance point according to the variation law of the displacement voltage. As shown in Figure 2, the gear position of the arc suppression coil when the displacement voltage reaches the maximum is: n, the maximum value of the displacement voltage in Fig. 2 is U 0 , and U 3 is the displacement voltage when the arc suppression coil is in a gear position greater than n;
在大于n档或者小于n档范围内选择连续两个档位，根据消弧线圈处于这两个档位时的位移电压计算出谐振电容的电流。Select two consecutive gears in the range greater than n gears or less than n gears, and calculate the current of the resonant capacitor according to the displacement voltage of the arc suppression coil when the two gears are in place.
设谐振电容的电流为IC，本实施例中以所选择的两个档位小于n档为例，设消弧线圈处于这两个档位时的位移电压分别为U1和U2，则根据如下公式计算出谐振电容的电流：Suppose the current of the resonant capacitor is I C . In this embodiment, the selected two gears are less than n gears as an example, and the displacement voltages of the arc suppression coil in these two gears are U 1 and U 2 respectively, then Calculate the current of the resonant capacitor according to the following formula:
IC＝(U1*I1+U2*I2)/(U1+U2)。I C =(U 1 *I 1 +U 2 *I 2 )/(U 1 +U 2 ).
利用本实施例所提供的基于消弧线圈的谐振电容电流准确性判断方法对谐振电容的电流IC准确性判断的方法为：The method for judging the accuracy of the current I C of the resonant capacitor by using the method for judging the accuracy of the current of the resonant capacitor based on the arc suppression coil provided by this embodiment is:
设位移电压最大时消弧线圈所处的档位为n，当消弧线圈处于n-1档时消弧线圈电感的电流为In-1，当消弧线圈处于n+1档时消弧线圈电感的电流为In+1,则：When the displacement voltage is the largest, the position of the arc suppression coil is n. When the arc suppression coil is in the n-1 gear, the current of the arc suppression coil inductance is I n-1 . When the arc suppression coil is in the n+1 gear, the arc is suppressed. The current of the coil inductance is I n+1 , then:
当谐振电容的电流IC在电流In-1和In+1之间时，判断为谐振电容的电流IC准确；When the current I C of the resonant capacitor is between the currents I n-1 and I n+1 , it is judged that the current I C of the resonant capacitor is accurate;
当谐振电容的电流IC不在电流In-1和In+1之间时，判断为谐振电容的电流IC不准确，需要重新调档计算。When the current I C of the resonant capacitor is not between the currents I n-1 and I n+1 , it is determined that the current I C of the resonant capacitor is inaccurate, and it is necessary to re-scale the calculation.
在对位移电压进行测试的过程中，如果消弧线圈降到最低档或者升到最高档时位移电压没有达到最大值，则判断为谐振电容的电流超出消弧线圈的补偿范围。In the process of testing the displacement voltage, if the displacement voltage does not reach the maximum value when the arc suppression coil is lowered to the lowest gear or raised to the highest gear, it is judged that the current of the resonant capacitor exceeds the compensation range of the arc suppression coil.
装置实施例：Device Example:
本实施例提供一种消弧线圈谐振电容的电流准确性判断装置，包括处理器和存储器，存储器上存储有用于在处理器上执行的计算机程序，处理器执行该计算机程序时，实现上述方法实施例中的消弧线圈谐振电容的电流准确性判断方法。This embodiment provides a device for judging the current accuracy of the resonant capacitor of an arc suppression coil, including a processor and a memory. The memory stores a computer program for execution on the processor. When the processor executes the computer program, the above method is implemented. The current accuracy judgment method of the resonant capacitor of the arc suppression coil in the example.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811230963.5A CN109298231B (en) | 2018-10-22 | 2018-10-22 | Method and device for current detection of resonant capacitor of arc suppression coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811230963.5A CN109298231B (en) | 2018-10-22 | 2018-10-22 | Method and device for current detection of resonant capacitor of arc suppression coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109298231A CN109298231A (en) | 2019-02-01 |
| CN109298231B true CN109298231B (en) | 2020-12-01 |
Family
ID=65158305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811230963.5A Active CN109298231B (en) | 2018-10-22 | 2018-10-22 | Method and device for current detection of resonant capacitor of arc suppression coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109298231B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325032B (en) * | 2020-09-30 | 2025-04-01 | 广西电网有限责任公司防城港供电局 | Analytical method for reducing the error of automatic tracking and compensation of arc suppression coil capacitance current measurement |
| CN114487969A (en) * | 2022-02-09 | 2022-05-13 | 广东韶钢松山股份有限公司 | Live debugging method and device for composite grounding system |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU528654A1 (en) * | 1974-07-16 | 1976-09-15 | Челябинский Политехнический Институт | Method and device for automatic tuning arc arc coil |
| EP0235145A1 (en) * | 1984-11-19 | 1987-09-09 | Klaus Winter | Monitoring device for not directly earthed electrical networks. |
| JPH06260308A (en) * | 1993-03-04 | 1994-09-16 | Hitachi Ltd | Neutral point grounding device |
| CN101071145A (en) * | 2007-06-14 | 2007-11-14 | 思源电气股份有限公司 | Method for measuring capacitance current of automatic tracking compensating device for arc-extinguishing coil |
| CN101212138A (en) * | 2006-12-25 | 2008-07-02 | 万达集团股份有限公司 | Capacitance-adjustable automatic compensating arc extinguishing coil |
| CN101895123A (en) * | 2010-07-05 | 2010-11-24 | 李景禄 | Method for controlling compensated power network neutral point displacement voltage by grounding bidirectional offset-regulating switch |
| CN103490405A (en) * | 2013-09-29 | 2014-01-01 | 张家港智电柔性输配电技术研究所有限公司 | Method for automatically controlling capacity modulating type arc suppression coil |
| EP2686691A1 (en) * | 2011-06-14 | 2014-01-22 | Dlaboratory Sweden AB | A method for detecting earth faults |
| CN105449660A (en) * | 2015-10-12 | 2016-03-30 | 国家电网公司 | Parallel type automatic compensation apparatus for arc-suppression coil |
| CN206096222U (en) * | 2016-10-25 | 2017-04-12 | 云南电网有限责任公司电力科学研究院 | Isolated neutral system capacitance current testing arrangement |
| CN106802361A (en) * | 2017-02-21 | 2017-06-06 | 国家电网公司 | A kind of capacitance current measurement method and system of distribution mixed connection ground connection operation |
-
2018
- 2018-10-22 CN CN201811230963.5A patent/CN109298231B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU528654A1 (en) * | 1974-07-16 | 1976-09-15 | Челябинский Политехнический Институт | Method and device for automatic tuning arc arc coil |
| EP0235145A1 (en) * | 1984-11-19 | 1987-09-09 | Klaus Winter | Monitoring device for not directly earthed electrical networks. |
| JPH06260308A (en) * | 1993-03-04 | 1994-09-16 | Hitachi Ltd | Neutral point grounding device |
| CN101212138A (en) * | 2006-12-25 | 2008-07-02 | 万达集团股份有限公司 | Capacitance-adjustable automatic compensating arc extinguishing coil |
| CN101071145A (en) * | 2007-06-14 | 2007-11-14 | 思源电气股份有限公司 | Method for measuring capacitance current of automatic tracking compensating device for arc-extinguishing coil |
| CN101895123A (en) * | 2010-07-05 | 2010-11-24 | 李景禄 | Method for controlling compensated power network neutral point displacement voltage by grounding bidirectional offset-regulating switch |
| EP2686691A1 (en) * | 2011-06-14 | 2014-01-22 | Dlaboratory Sweden AB | A method for detecting earth faults |
| CN103490405A (en) * | 2013-09-29 | 2014-01-01 | 张家港智电柔性输配电技术研究所有限公司 | Method for automatically controlling capacity modulating type arc suppression coil |
| CN105449660A (en) * | 2015-10-12 | 2016-03-30 | 国家电网公司 | Parallel type automatic compensation apparatus for arc-suppression coil |
| CN206096222U (en) * | 2016-10-25 | 2017-04-12 | 云南电网有限责任公司电力科学研究院 | Isolated neutral system capacitance current testing arrangement |
| CN106802361A (en) * | 2017-02-21 | 2017-06-06 | 国家电网公司 | A kind of capacitance current measurement method and system of distribution mixed connection ground connection operation |
Non-Patent Citations (6)
| Title |
|---|
| Natural canceling of current harmonics in office loads and its effect upon the transmission capacity of distribution cables;Charis Demoulias 等;《2008 IEEE International Symposium on Industrial Electronics》;20080702;全文 * |
| 基于并联阻抗的矿井配网电容电流测量方法;周顺;《江西煤炭科技》;20160229;全文 * |
| 智能接地补偿装置跟踪系统电容电流的方法;王轶成;《电力自动化设备》;20020131;全文 * |
| 浅析谐振接地系统电容电流测量方法;李国全;《科技专论》;20130206;全文 * |
| 浅谈消弧线圈运行抽头的选择原则;孙德龙 等;《东北电力技术》;20050228;全文 * |
| 电容电流测试及消弧线圈选择;许东波;《民营科技》;20121031;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109298231A (en) | 2019-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108347046B (en) | A kind of small current grounding fault New Method of Active Electronic Compensation and system | |
| JP6130419B2 (en) | Method for detecting insulation resistance of non-grounded DC power supply with high sensitivity and its electric circuit | |
| CN106353642B (en) | A Small Current Grounding Wire Selection and Tuning Method Based on the Access Control of Arc Suppression Coils for Short-time Abnormal Signals | |
| CN110361686B (en) | Multi-parameter-based fault detection method for capacitive voltage transformer | |
| CN104374312B (en) | Method for detecting deformation of power transformer winding | |
| CN107192883B (en) | A kind of resonant earthed system high resistance earthing fault transition resistance discrimination method | |
| CN109298231B (en) | Method and device for current detection of resonant capacitor of arc suppression coil | |
| CN108919026B (en) | Live detection method for leakage current of lightning arrester | |
| CN111025084A (en) | Low-current ground fault line selection method based on MEEMD decomposition and high-frequency energy | |
| CN111030143A (en) | Three-phase unbalanced system capacitance current test correction method | |
| CN106684837A (en) | Range-finding protection method for flexible DC lines | |
| CN111141945A (en) | Method for measuring capacitance current of three-phase unbalanced system | |
| CN104198873A (en) | Grounding detection method for secondary loop of voltage transformer | |
| CN109901019B (en) | Method and device for measuring capacitance current of resonant grounding system | |
| CN105937876B (en) | A detection system and detection method for transformer winding deformation | |
| CN112230101A (en) | Fault-phase identification method for single-phase-to-ground fault in distribution network based on active injection method | |
| JP7575838B2 (en) | Fault detection in shunt capacitor banks | |
| CN109782055B (en) | Method and device for measuring capacitance current of ungrounded neutral system | |
| CN117214601A (en) | Fault line selection method utilizing zero sequence current phase characteristics | |
| CN104569729A (en) | Fault indicator based power distribution network single-phase earth fault detection method and fault indicator based power distribution network single-phase earth fault detection system | |
| CN109768538B (en) | Full compensation method and circuit for grounding of parallel controllable current source of arc suppression coil | |
| CN115856505A (en) | Location positioning method and device for single-phase earth fault of active power distribution network | |
| CN111025021B (en) | Memory, method, apparatus and apparatus for measuring GIS loop resistance | |
| CN113779112A (en) | Electric energy quality analysis system based on spatial information and big data mapping algorithm | |
| CN108037417B (en) | Quick detection method for faults of ungrounded system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |