CN117686843A - Power distribution network fault line selection method and system based on waveform high-order accumulation reconstruction - Google Patents
Power distribution network fault line selection method and system based on waveform high-order accumulation reconstruction Download PDFInfo
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Abstract
Description
技术领域Technical field
本发明涉及电力系统继电保护技术领域,尤其涉及一种基于波形高次累加重构的配电网故障选线方法、系统以及可读存储介质。The invention relates to the technical field of power system relay protection, and in particular to a distribution network fault line selection method, system and readable storage medium based on high-order accumulation and reconstruction of waveforms.
背景技术Background technique
配电网是连接电网与用户的重要部分,其运行的稳定性与安全性与人们的生活有着密切的联系,对促进社会的发展与经济的发展有着重要作用。在我国,配电网一般采用中性点经消弧线圈接地或中性点经小电阻接地的工作方式,故障也有很多类型,其中单相接地故障占电网中所有事故的90%以上。当系统发生单相接地故障时,接地电流很小、馈线数目较多,加之故障特征有时不明显,给故障检测带来了较大的困难,因此必须要重视单相接地故障选线方法。为了提高供电可靠性和确保电网安全稳定运行,研究高效、准确、可靠的单相接地故障选线方法尤为重要。The distribution network is an important part that connects the power grid and users. The stability and safety of its operation are closely related to people's lives, and it plays an important role in promoting social and economic development. In my country, the distribution network generally adopts the working mode of neutral point grounding through arc suppression coil or neutral point grounding through small resistance. There are many types of faults, among which single-phase grounding faults account for more than 90% of all accidents in the power grid. When a single-phase ground fault occurs in the system, the ground current is very small, the number of feeders is large, and the fault characteristics are sometimes not obvious, which brings greater difficulties to fault detection. Therefore, the single-phase ground fault line selection method must be paid attention to. In order to improve the reliability of power supply and ensure the safe and stable operation of the power grid, it is particularly important to study efficient, accurate and reliable single-phase ground fault line selection methods.
在配电网的相关技术方案中,配电网的中性点一般采用不接地或谐振接地方式,当发生单相接地故障时流过故障点的电流很小,同时又不影响系统的对称性,可以带故障运行一段时间,所以叫做小电流接地配电网。小电流接地配电网的主要优点在于流入大地的电流小,对于一些干扰性的瞬时性故障可以不引起保护动作,有效地提升了供电可靠性。In related technical solutions for distribution networks, the neutral point of the distribution network generally adopts an ungrounded or resonant grounding method. When a single-phase ground fault occurs, the current flowing through the fault point is very small without affecting the symmetry of the system. , can run with faults for a period of time, so it is called a small current grounded distribution network. The main advantage of a small-current grounded distribution network is that the current flowing into the earth is small, and some interfering transient faults do not cause protection actions, which effectively improves the reliability of power supply.
然而,发明人在构思及实现本方案时,发现此接地方式有以下不足:由于小电流接地方式下的配电网发生单相接地故障时,其故障特征不明显,难以实现准确选线。本发明将配电网中各馈线的零序电流高次累加重构波形积分值的比值作为判据,可判断该馈线是故障线路还是健全线路,利用高次累加波形处理,可以突显出零序电流的故障特征;同时运用积分求取重构波形面积,可更加精确刻画出故障零序电流波形的畸变特性,将微弱的变化进行放大,利用故障线路与健全线路重构后的面积比值,以此作为故障选线的依据。However, when the inventor conceived and implemented this solution, he found that this grounding method has the following shortcomings: when a single-phase ground fault occurs in the distribution network under the low-current grounding method, the fault characteristics are not obvious, making it difficult to achieve accurate line selection. This invention uses the ratio of the integrated value of the high-order accumulated reconstructed waveform of each feeder in the distribution network as a criterion to determine whether the feeder is a faulty line or a sound line. By using high-order accumulated waveform processing, the zero sequence can be highlighted. The fault characteristics of the current; at the same time, the integral is used to calculate the reconstructed waveform area, which can more accurately depict the distortion characteristics of the fault zero-sequence current waveform, amplify the weak changes, and use the reconstructed area ratio of the faulty line and the healthy line to This serves as the basis for fault line selection.
发明内容Contents of the invention
本发明的主要目的在于提供一种基于波形高次累加重构的配电网故障选线方法,旨在解决如何提高配电网选线准确的问题。The main purpose of the present invention is to provide a distribution network fault line selection method based on high-order accumulation and reconstruction of waveforms, aiming to solve the problem of how to improve the accuracy of distribution network line selection.
为实现上述目的,本发明提供的一种基于波形高次累加重构的配电网故障选线方法,所述方法包括:In order to achieve the above objectives, the present invention provides a distribution network fault line selection method based on high-order accumulation and reconstruction of waveforms. The method includes:
获取配电网中母线的零序电压及各馈线的实测零序电流;Obtain the zero-sequence voltage of the bus in the distribution network and the measured zero-sequence current of each feeder;
构造各馈线对应的零序电流高次累加波形;Construct the high-order accumulation waveform of zero-sequence current corresponding to each feeder;
根据所述零序电流高次累加波形,计算各馈线重构后的波形积分值;According to the high-order accumulated waveform of the zero-sequence current, calculate the reconstructed waveform integral value of each feeder;
根据所述零序电流高次累加波形曲线积分值,确定各所述馈线中的故障馈线。According to the integrated value of the high-order accumulated waveform curve of the zero-sequence current, the faulty feeder in each of the feeders is determined.
可选地,获取配电网中母线的零序电压及各馈线的实测零序电流的步骤包括:Optionally, the steps of obtaining the zero-sequence voltage of the busbar and the measured zero-sequence current of each feeder in the distribution network include:
通过使用电压互感器(PT)、电流互感器(CT)实时测量并记录故障时配电网母线的零序电压和各馈线的零序电流。By using voltage transformers (PT) and current transformers (CT), the zero-sequence voltage of the distribution network bus and the zero-sequence current of each feeder are measured and recorded in real time during faults.
当所述母线零序电压的瞬时值大于预设的电压阈值时,向故障录波选线装置发送电信号,以启动故障录波选线装置。When the instantaneous value of the bus zero sequence voltage is greater than the preset voltage threshold, an electrical signal is sent to the fault wave recording and line selection device to activate the fault wave recording and line selection device.
可选地,构造各馈线对应的零序电流高次累加波形的步骤包括:Optionally, the steps of constructing the high-order accumulated waveform of zero sequence current corresponding to each feeder include:
将所述配电网中各馈线对应的零序电流量作立方运算;Cube the zero-sequence current corresponding to each feeder in the distribution network;
将作立方运算后的零序电流五个采样点增强累加,循环累加至结束,得到一组新的零序电流序列,得到幅值增强与极性不变的高次累加变换馈线零序电流量,其计算方法如下:The five sampling points of the zero-sequence current after the cubic operation are enhanced and accumulated, and the cycle is accumulated to the end to obtain a new set of zero-sequence current sequences, and the high-order accumulation-transformed feeder zero-sequence current with enhanced amplitude and unchanged polarity is obtained. , its calculation method is as follows:
式中:设零序电流共有个采样点,为,为第馈线的零序电 流。 In the formula: Assume that the zero sequence current has a total sampling points, for , for the first Feeder zero sequence current.
根据其高次累加的计算值,绘制零序电流高次累加重构波形图。Based on the calculated value of its high-order accumulation, the high-order accumulation reconstructed waveform diagram of the zero-sequence current is drawn.
可选地,根据所述零序电流高次累加波形,计算各馈线重构后的波形积分值的步骤包括:Optionally, based on the zero-sequence current high-order accumulated waveform, the step of calculating the reconstructed waveform integral value of each feeder includes:
将所述零序电流高次累加波形进行积分运算,计算得到零序电流高次累加波形的积分值;Perform an integral operation on the high-order accumulated waveform of the zero-sequence current to calculate the integral value of the high-order accumulated waveform of the zero-sequence current;
式中:为高次累加重构波形,为总采样点,为某条馈线。 In the formula: Reconstructed waveform for high-order accumulation, is the total sampling points, for a certain feeder.
可选地,根据所述零序电流高次累加波形曲线积分值,确定各所述馈线中的故障馈线的步骤包括:Optionally, the step of determining the faulty feeder in each of the feeders according to the integrated value of the high-order accumulated waveform curve of the zero-sequence current includes:
将所有馈线的零序电流高次累加重构波形作积分运算,得到重构波形的积分值;Perform an integral operation on the high-order accumulated zero-sequence currents of all feeders and perform an integral operation on the reconstructed waveform to obtain the integral value of the reconstructed waveform;
计算任一馈线的高次累加重构波形积分值与其他馈线的高次累加重构波形积分值的比值是否大于所设阈值;Calculate whether the ratio of the high-order accumulated reconstructed waveform integral value of any feeder to the high-order accumulated reconstructed waveform integral value of other feeders is greater than the set threshold;
若大于,则判断所述馈线为故障馈线;If it is greater than the value, the feeder is judged to be a faulty feeder;
式中:为馈线进行高次累加后的波形积分值,为馈线进行高次累加后的波 形积分值,和为配电网中任一馈线,有条馈线,为积分之比阈值,一般取为1.5,满足 上式,则第条馈线为故障馈线。 In the formula: for feeder The integrated value of the waveform after high-order accumulation, for feeder The integrated value of the waveform after high-order accumulation, and For any feeder in the distribution network, there are feeder line, is the integral ratio threshold, which is generally taken as 1.5. If the above formula is satisfied, then the The feeder is a faulty feeder.
若比值小于所设阈值,则判断第条馈线为健全馈线。 If the ratio is less than the set threshold, determine the The feeders are sound feeders.
此外,为实现上述目的,本发明还提供一种基于波形高次累加重构的配电网故障选线系统,所述配电网的故障选线系统包括:In addition, to achieve the above objectives, the present invention also provides a distribution network fault line selection system based on high-order accumulation and reconstruction of waveforms. The fault line selection system of the distribution network includes:
数据采集模块,用于获取配电网中母线的零序电压和各条馈线的零序电流;The data acquisition module is used to obtain the zero-sequence voltage of the busbar and the zero-sequence current of each feeder in the distribution network;
数值计算模块,根据实采的各馈线的零序电流,先以立方再以每五个采样点累加为一个数据点,完成波形的高次累加计算;计算各馈线高次累加波形后的积分值,以及计算任一馈线之间的比值,并于所设阈值相比较。The numerical calculation module, based on the actual zero-sequence current of each feeder, first cubes and then accumulates every five sampling points into one data point to complete the high-order accumulation calculation of the waveform; calculates the integral value of each feeder after the high-order accumulation waveform , and calculate the ratio between any feeder and compare it with the set threshold.
逻辑判断模块,用于根据所述任一馈线重构后的积分值比值,确定故障馈线。A logical judgment module is used to determine the faulty feeder based on the reconstructed integral value ratio of any feeder.
可选地,所述数据采集模块包括:Optionally, the data collection module includes:
数据采集单元,用于实时采集母线零序电压和各馈线的零序电流;Data acquisition unit, used to collect the bus zero-sequence voltage and the zero-sequence current of each feeder in real time;
模数变换单元,用于将采集到的母线零序电压信号和零序电流信号的瞬时值变换成数字量信号的数字值。The analog-to-digital conversion unit is used to convert the collected instantaneous values of the bus zero-sequence voltage signal and zero-sequence current signal into the digital value of the digital signal.
可选地,所述数值计算模块还包括:Optionally, the numerical calculation module also includes:
信号计算单元:用于在采集到的母线零序电压的瞬时值大于预设电压阈值时,构造启动信号;Signal calculation unit: used to construct a start signal when the instantaneous value of the collected bus zero-sequence voltage is greater than the preset voltage threshold;
启动计算单元:用于当采集到的母线零序电压的瞬时值大于预设电压阈值时,启动选线装置;Start calculation unit: used to start the line selection device when the instantaneous value of the collected bus zero sequence voltage is greater than the preset voltage threshold;
高次累加计算单元:用于实现波形高次累加重构;High-order accumulation calculation unit: used to realize high-order accumulation and reconstruction of waveforms;
积分运算计算单元:用于计算各馈线高次累加重构波形的积分值;Integral operation calculation unit: used to calculate the integral value of the high-order accumulated reconstructed waveform of each feeder;
积分比值计算单元:用于计算任一馈线积分值与其他馈线积分值的比值。Integral ratio calculation unit: used to calculate the ratio of the integral value of any feeder to the integral value of other feeders.
可选地,所述逻辑判断模块还包括:Optionally, the logical judgment module also includes:
母线零序电压判断单元,用于确定母线零序电压的瞬时值是否大于预设电压阈值;The bus zero sequence voltage judgment unit is used to determine whether the instantaneous value of the bus zero sequence voltage is greater than the preset voltage threshold;
其中,若是,则启动高次累加计算单元、积分运算计算单元以及积分比值计算单元;Among them, if yes, start the high-order accumulation calculation unit, integral operation calculation unit and integral ratio calculation unit;
故障选线判断单元,判断任一馈线高次累加重构波形积分值与其他馈线高次累加重构波形积分值的比值是否大于所设阈值;The fault line selection judgment unit determines whether the ratio of the high-order accumulated reconstructed waveform integral value of any feeder to the high-order accumulated reconstructed waveform integral value of other feeders is greater than the set threshold;
其中,若大于,则判断所述目标馈线为故障馈线;若小于,则判断所述目标馈线为健全馈线。If the value is greater than the value, the target feeder is determined to be a faulty feeder; if the value is less than the value, the target feeder is determined to be a healthy feeder.
此外,为实现上述目的,本发明还提供一种计算机可读存储介质,所述计算机可读存储介质上存储有配电网的故障选线程序,所述配电网的故障选线程序被处理器执行时实现如上所述的基于波形高次累加重构的配电网故障选线方法的步骤。In addition, in order to achieve the above object, the present invention also provides a computer-readable storage medium, the computer-readable storage medium stores a fault line selection program of the distribution network, and the fault line selection program of the distribution network is processed When the controller is executed, the steps of implementing the distribution network fault line selection method based on waveform high-order accumulation reconstruction as mentioned above are implemented.
本发明实施例提供一种基于波形高次累加重构的配电网故障选线方法、系统以及计算机可读存储介质,此方法面向配电网接地方式(经消弧线圈接地、经小电阻接地等)的故障选线,将配电网中的各馈线的高次累加零序电流波形积分值作为判据,高次累加不仅可以增强幅值,同时还具有保号性;利用零序电流作为依据,该方法识别故障灵敏度高、速度快,且需要用到的传感器比正常三相的传感器要少,积分运算相较于幅值更能反映出全局变化,对故障选线的判别更加准确。Embodiments of the present invention provide a distribution network fault line selection method, system and computer-readable storage medium based on high-order accumulation and reconstruction of waveforms. This method is oriented to the distribution network grounding method (grounding through arc suppression coil, grounding through small resistance etc.), the high-order accumulated zero-sequence current waveform integral value of each feeder in the distribution network is used as the criterion. High-order accumulation can not only enhance the amplitude, but also has the ability to maintain the number; use the zero-sequence current as a According to this method, this method has high sensitivity and fast speed in identifying faults, and requires fewer sensors than normal three-phase sensors. The integral operation can better reflect the global changes compared with the amplitude, and the judgment of fault line selection is more accurate.
附图说明Description of the drawings
图1为本发明实施例涉及的配电网的故障选线系统的架构示意图;Figure 1 is a schematic structural diagram of a fault line selection system of a distribution network according to an embodiment of the present invention;
图2为基于PSCAD搭建的实施例模型;Figure 2 is an example model built based on PSCAD;
图3为本发明基于波形高次累加重构的配电网故障选线方法的流程示意图;Figure 3 is a schematic flow chart of the distribution network fault line selection method based on high-order waveform accumulation and reconstruction according to the present invention;
图4为配电网中正常线路的零序电流波形图;Figure 4 shows the zero-sequence current waveform diagram of normal lines in the distribution network;
图5为配电网中故障线路的零序电流波形图;Figure 5 shows the zero-sequence current waveform of the fault line in the distribution network;
图6为各馈线零序电流高次累加重构波形图。Figure 6 is a high-order accumulated reconstructed waveform diagram of the zero-sequence current of each feeder.
本发明目的的实现、功能特点及优点将结合实施例,参照附图作进一步说明。The realization of the purpose, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings.
具体实施方式Detailed ways
为了更好地理解上述技术方案,下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例,然而应当理解,可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反,提供这些实施例是为了能够更透彻地理解本公开,并且能够将本公开的范围完整地传达给本领域的技术人员。In order to better understand the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the disclosure will be more thorough, and the scope of the disclosure will be fully conveyed to those skilled in the art.
作为一种实现方案,图1为本发明实施例方案涉及的配电网的故障选线系统的架构示意图。As an implementation solution, FIG. 1 is a schematic architectural diagram of a fault line selection system of a distribution network involved in an embodiment of the present invention.
如图1所示,该系统包括数据采集模块101,数值计算模块102和逻辑判断模块103。其中,所述数据采集模块101用于获取配电网中母线的零序电压和各条馈线的零序电流;数值计算模块102根据实采的各馈线的零序电流,先以立方再以每五个采样点累加为一个数据点,完成波形的高次累加计算;计算各馈线高次累加波形后的积分值,以及计算任一馈线之间的比值,并与所设阈值相比较;逻辑判断模块103用于根据所述任一馈线重构后的积分值比值,确定故障馈线。其中:As shown in Figure 1, the system includes a data acquisition module 101, a numerical calculation module 102 and a logical judgment module 103. Among them, the data acquisition module 101 is used to obtain the zero-sequence voltage of the bus in the distribution network and the zero-sequence current of each feeder; the numerical calculation module 102 first calculates the zero-sequence current of each feeder based on the actual acquisition, first in cubes and then in each Five sampling points are accumulated into one data point to complete the high-order accumulation calculation of the waveform; calculate the integral value after the high-order accumulation waveform of each feeder, and calculate the ratio between any feeder and compare it with the set threshold; logical judgment Module 103 is used to determine the faulty feeder according to the reconstructed integral value ratio of any feeder. in:
数据采集模块101可以包括数据采集单元1011和模数变换单元1012。数据采集单元1011用于实时采集母线零序电压和各馈线的零序电流;模数变换单元1012用于将采集到的母线零序电压信号和零序电流信号的瞬时值变换成数字量信号的数字值。The data acquisition module 101 may include a data acquisition unit 1011 and an analog-to-digital conversion unit 1012. The data acquisition unit 1011 is used to collect the bus zero-sequence voltage and the zero-sequence current of each feeder in real time; the analog-to-digital conversion unit 1012 is used to convert the collected instantaneous values of the bus zero-sequence voltage signal and zero-sequence current signal into digital signals. Numeric value.
数值计算模块102可以包括启动计算单元1021,高次累加计算单元1022,积分运算计算单元1023,积分比值计算单元1024。启动计算单元1021用于当采集到的母线零序电压的瞬时值大于预设电压阈值时,启动选线装置;高次累加计算单元1022用于实现波形高次累加重构;积分运算计算单元1023用于计算各馈线高次累加重构波形的积分值;积分比值计算单元1024用于计算任一馈线积分值与其他馈线积分值的比值。The numerical calculation module 102 may include a startup calculation unit 1021, a high-order accumulation calculation unit 1022, an integral operation calculation unit 1023, and an integral ratio calculation unit 1024. The starting calculation unit 1021 is used to start the line selection device when the instantaneous value of the collected bus zero sequence voltage is greater than the preset voltage threshold; the high-order accumulation calculation unit 1022 is used to realize the high-order accumulation and reconstruction of the waveform; the integral operation calculation unit 1023 It is used to calculate the integral value of the high-order accumulated reconstructed waveform of each feeder; the integral ratio calculation unit 1024 is used to calculate the ratio of the integral value of any feeder to the integral value of other feeders.
逻辑判断模块103可以包括母线零序电压判断单元1031,故障选线判断单元1032。母线零序电压判断单元1031用于确定母线零序电压的瞬时值是否大于预设电压阈值;其中,若是,则启动高次累加计算单元、积分运算计算单元以及积分比值计算单元;故障选线判断单元1032用于判断任一馈线高次累加重构波形积分值与其他馈线高次累加重构波形积分值的比值是否大于所设阈值;其中,若大于,则判断所述目标馈线为故障馈线;若小于,则判断所述目标馈线为健全馈线。。The logic judgment module 103 may include a bus zero sequence voltage judgment unit 1031 and a fault line selection judgment unit 1032. The bus zero-sequence voltage judgment unit 1031 is used to determine whether the instantaneous value of the bus zero-sequence voltage is greater than the preset voltage threshold; if so, start the high-order accumulation calculation unit, the integral operation calculation unit and the integral ratio calculation unit; fault line selection judgment Unit 1032 is used to determine whether the ratio of the high-order accumulated reconstructed waveform integral value of any feeder to the high-order accumulated reconstructed waveform integral value of other feeders is greater than the set threshold; if it is greater, the target feeder is judged to be a fault feeder; If it is less than, the target feeder is judged to be a healthy feeder. .
此外,图1中示出的配电网的故障选线系统还包括存储器104和处理器105,存储器104可以是高速RAM存储器,也可以是稳定的存储器(non-volatilememory),例如磁盘存储器。存储器104用于存储作为一种计算机可读存储介质的配电网的故障选线程序,而处理器105可以用于调用存储器104中存储的配电网的故障选线程序,并执行以下操作:In addition, the fault selection system of the distribution network shown in Figure 1 also includes a memory 104 and a processor 105. The memory 104 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 104 is used to store the fault line selection program of the distribution network as a computer-readable storage medium, and the processor 105 can be used to call the fault line selection program of the distribution network stored in the memory 104 and perform the following operations:
获取配电网中母线的零序电压,以及获取各馈线的实测零序电流;Obtain the zero-sequence voltage of the bus in the distribution network and obtain the measured zero-sequence current of each feeder;
构造各馈线对应的零序电流高次累加波形;Construct the high-order accumulation waveform of zero-sequence current corresponding to each feeder;
根据所述零序电流高次累加波形,计算各馈线重构后的波形积分值;According to the high-order accumulated waveform of the zero-sequence current, calculate the reconstructed waveform integral value of each feeder;
根据所述零序电流高次累加波形曲线积分值,确定各所述馈线中的故障馈线。According to the integrated value of the high-order accumulated waveform curve of the zero-sequence current, the faulty feeder in each of the feeders is determined.
在实施例中,处理器105调用存储器104中存储的配电网的故障选线程序时,执行以下操作:In the embodiment, when the processor 105 calls the fault line selection program of the distribution network stored in the memory 104, the following operations are performed:
通过使用电压互感器(PT)、电流互感器(CT)实时测量并记录故障时配电网母线的零序电压和各馈线的零序电流。By using voltage transformers (PT) and current transformers (CT), the zero-sequence voltage of the distribution network bus and the zero-sequence current of each feeder are measured and recorded in real time during faults.
当所述母线零序电压的瞬时值大于预设的电压阈值时,向故障录波选线装置发送电信号,以启动故障录波选线装置。When the instantaneous value of the bus zero sequence voltage is greater than the preset voltage threshold, an electrical signal is sent to the fault wave recording and line selection device to activate the fault wave recording and line selection device.
在实施例中,处理器105调用存储器104中存储的配电网的故障选线程序时,执行以下操作:In the embodiment, when the processor 105 calls the fault line selection program of the distribution network stored in the memory 104, the following operations are performed:
将所述配电网中各馈线对应的零序电流量作立方运算;Cube the zero-sequence current corresponding to each feeder in the distribution network;
将作立方运算后的零序电流五个采样点增强累加,循环累加至结束,得到一组新的零序电流序列,得到幅值增强与极性不变的高次累加变换馈线零序电流量,其计算方法如下:The five sampling points of the zero-sequence current after the cubic operation are enhanced and accumulated, and the cycle is accumulated to the end to obtain a new set of zero-sequence current sequences, and the high-order accumulation-transformed feeder zero-sequence current with enhanced amplitude and unchanged polarity is obtained. , its calculation method is as follows:
式中:设零序电流共有个采样点,为,为第馈线的零序电 流。 In the formula: Assume that the zero sequence current has a total sampling points, for , for the first Feeder zero sequence current.
根据其高次累加的计算值,绘制零序电流高次累加重构波形图。Based on the calculated value of its high-order accumulation, the high-order accumulation reconstructed waveform diagram of the zero-sequence current is drawn.
在实施例中,处理器105调用存储器104中存储的配电网的故障选线程序时,执行以下操作:In the embodiment, when the processor 105 calls the fault line selection program of the distribution network stored in the memory 104, the following operations are performed:
将所述零序电流高次累加波形进行积分运算,计算得到零序电流高次累加波形的积分值;Perform an integral operation on the high-order accumulated waveform of the zero-sequence current to calculate the integral value of the high-order accumulated waveform of the zero-sequence current;
式中:为高次累加重构波形,为总采样点,为某条馈线。 In the formula: Reconstructed waveform for high-order accumulation, is the total sampling points, for a certain feeder.
在实施例中,处理器105调用存储器104中存储的配电网的故障选线程序时,执行以下操作:In the embodiment, when the processor 105 calls the fault line selection program of the distribution network stored in the memory 104, the following operations are performed:
将所有馈线的零序电流高次累加重构波形作积分运算,得到重构波形的积分值;Perform an integral operation on the high-order accumulated zero-sequence currents of all feeders and perform an integral operation on the reconstructed waveform to obtain the integral value of the reconstructed waveform;
计算任一馈线的高次累加重构波形积分值与其他馈线的高次累加重构波形积分值的比值是否大于所设阈值;Calculate whether the ratio of the high-order accumulated reconstructed waveform integral value of any feeder to the high-order accumulated reconstructed waveform integral value of other feeders is greater than the set threshold;
若大于,则判断所述馈线为故障馈线;If it is greater than the value, the feeder is judged to be a faulty feeder;
式中:为馈线进行高次累加后的波形积分值,为馈线进行高次累加后的波 形积分值,和为配电网中任一馈线,有条馈线,为积分之比阈值,一般取为1.5,满足 上式,则第条馈线为故障馈线。 In the formula: for feeder The integrated value of the waveform after high-order accumulation, for feeder The integrated value of the waveform after high-order accumulation, and For any feeder in the distribution network, there are feeder line, is the integral ratio threshold, which is generally taken as 1.5. If the above formula is satisfied, then the The feeder is a faulty feeder.
若比值小于所设阈值,则判断第条馈线为健全馈线。 If the ratio is less than the set threshold, determine the The feeders are sound feeders.
此外,本领域技术人员可以理解,图1中示出的配电网的故障选线系统的架构并不构成对配电网的故障选线系统限定,可以包括比图示更多或更少的部件,或者组合某些部件,或者不同的部件布置。In addition, those skilled in the art can understand that the architecture of the fault line selection system of the distribution network shown in Figure 1 does not constitute a limitation on the fault line selection system of the distribution network, and may include more or less than what is shown in the figure. components, or combinations of certain components, or different arrangements of components.
基于电力系统继电保护技术的配电网故障选线系统的硬件架构,提出本发明基于波形高次累加重构的配电网故障选线方法的实施例。Based on the hardware architecture of the distribution network fault line selection system based on power system relay protection technology, an embodiment of the distribution network fault line selection method based on waveform high-order accumulation reconstruction is proposed.
参考图2,本发明在PSCAD搭建实施例配电线路模型,共有4条馈线,L1、L4为架空线路,L2、L3为电缆线路,采样频率为10kHz,在L1段架空线路中设置单相金属性接地故障。Referring to Figure 2, the present invention builds an embodiment distribution line model in PSCAD, with a total of 4 feeders, L1 and L4 are overhead lines, L2 and L3 are cable lines, the sampling frequency is 10kHz, and a single-phase metal is set in the L1 section of the overhead line Ground fault.
参照图3,图3是本发明提供的一种基于波形高次累加重构的配电网故障选线方法及系统的具体实施流程图。Referring to Figure 3, Figure 3 is a specific implementation flow chart of a distribution network fault line selection method and system based on high-order waveform accumulation and reconstruction provided by the present invention.
步骤S10,获取配电网中母线的零序电压,以及获取各馈线的实测零序电流;Step S10: Obtain the zero-sequence voltage of the bus in the distribution network and obtain the measured zero-sequence current of each feeder;
图4为配电网中故障线路的零序电流波形图;图5为配电网中正常线路的零序电流波形图;Figure 4 is a zero-sequence current waveform diagram of a faulty line in a distribution network; Figure 5 is a zero-sequence current waveform diagram of a normal line in a distribution network;
需要说明的是,本实施例针对配电网小电流接地系统,只需零序电流互感器,比使用三相电流互感器的成本更低。It should be noted that this embodiment is aimed at the small current grounding system of the distribution network and only requires a zero-sequence current transformer, which is lower in cost than using a three-phase current transformer.
步骤S20,构造各馈线对应的零序电流高次累加波形;Step S20, construct the high-order accumulated waveform of zero sequence current corresponding to each feeder;
在本实施例中,在获取到实测馈线零序电流后,首先进行零序电流波形的立方运算,使故障突变量更为明显,再进行每五个采样点的累加运算,以完成波形重构。将故障馈线的零序电流波形完成放大,故障特征更加明显,更好与健全馈线相区别。In this embodiment, after the measured feeder zero-sequence current is obtained, the cubic operation of the zero-sequence current waveform is first performed to make the fault mutation amount more obvious, and then the accumulation operation of every five sampling points is performed to complete the waveform reconstruction. . By amplifying the zero-sequence current waveform of a faulty feeder, the fault characteristics are more obvious and can be better distinguished from a healthy feeder.
步骤S30,根据所述零序电流高次累加波形,计算各馈线重构后的波形积分值;Step S30: Calculate the reconstructed waveform integral value of each feeder according to the high-order accumulated waveform of the zero-sequence current;
计算各馈线对应的零序电流高次累加波形积分值,零序电流高次累加波形积分值表征为通过对馈线重构后的零序电流波形进行积分得到的一个数值,通常用来表示该馈线在某个时间段内的故障特征总量大小,在本实施例中,通过将每条馈线的零序电流高次累加波形进行积分,可以得到该馈线在故障期间内零序电流突变量的大小,进而判断该馈线是否存在故障。Calculate the high-order accumulated waveform integral value of the zero-sequence current corresponding to each feeder. The high-order accumulated waveform integral value of the zero-sequence current is represented by a value obtained by integrating the reconstructed zero-sequence current waveform of the feeder. It is usually used to represent the feeder. The total amount of fault characteristics in a certain period of time. In this embodiment, by integrating the high-order accumulated waveform of the zero-sequence current of each feeder, the magnitude of the zero-sequence current mutation of the feeder during the fault period can be obtained. , and then determine whether there is a fault in the feeder.
步骤S40,根据所述零序电流高次累加波形曲线积分值,确定各所述馈线中的故障馈线;Step S40: Determine the faulty feeder in each of the feeders according to the integrated value of the high-order accumulated waveform curve of the zero-sequence current;
在本实施例提供的技术方案中,将配电网中各馈线的零序电流高次累加波形积分值作为判据,判断该馈线是否为故障线路,由于只需测量线路的零序电流,所需要的数据信息量少,同时传感设备所需也较测量三相要少,通过高次和累加能凸显出故障馈线与正常馈线的差异,因此对于配电网小电流接地方式下其故障接地电流小的情况下,能实现准确选线。In the technical solution provided by this embodiment, the high-order accumulated waveform integral value of each feeder in the distribution network is used as a criterion to determine whether the feeder is a faulty line. Since only the zero-sequence current of the line only needs to be measured, The amount of data information required is small, and the sensing equipment required is less than that of measuring three phases. The difference between faulty feeders and normal feeders can be highlighted through high order and accumulation. Therefore, for fault grounding in the small current grounding mode of the distribution network When the current is small, accurate line selection can be achieved.
进一步的,在本实施例中,所述步骤S20包括:Further, in this embodiment, step S20 includes:
步骤S21,将所述配电网中各馈线对应的零序电流量作立方运算;Step S21: Cube the zero-sequence current corresponding to each feeder in the distribution network;
步骤S22,将作立方运算后的零序电流五个采样点增强累加,循环累加至结束,得到一组新的零序电流序列,得到幅值增强与极性不变的高次累加变换馈线零序电流量,其计算方法如下:Step S22: Enhance and accumulate the five sampling points of the zero-sequence current after the cubic operation. The cycle is accumulated to the end to obtain a new set of zero-sequence current sequences. The high-order accumulation transform feeder zero with enhanced amplitude and unchanged polarity is obtained. The sequence current amount is calculated as follows:
式中:设零序电流共有个采样点,为,为第馈线的零序电 流。 In the formula: Assume that the zero sequence current has a total sampling points, for , for the first Feeder zero sequence current.
步骤S23,根据其高次累加的计算值,绘制零序电流高次累加重构波形图。Step S23: Draw a high-order accumulated reconstructed waveform diagram of the zero-sequence current based on the calculated value of the high-order accumulated value.
进一步的,在本实施例中,所述步骤S30包括:Further, in this embodiment, step S30 includes:
步骤S31,将所述零序电流高次累加波形进行积分运算,计算得到零序电流高次累加波形的积分值;Step S31, perform an integral operation on the high-order accumulated waveform of the zero-sequence current, and calculate the integral value of the high-order accumulated waveform of the zero-sequence current;
式中:为高次累加重构波形,为总采样点,为某条馈线。 In the formula: Reconstructed waveform for high-order accumulation, is the total sampling points, for a certain feeder.
图6为实施例各馈线零序电流高次累加重构波形图。Figure 6 is a high-order accumulated reconstructed waveform diagram of the zero-sequence current of each feeder according to the embodiment.
进一步的,在本实施例中,所述步骤S40包括:Further, in this embodiment, step S40 includes:
步骤S41,将所有馈线的零序电流高次累加重构波形作积分运算,得到重构波形的积分值;Step S41, perform an integral operation on the high-order accumulated zero-sequence currents of all feeders and reconstruct the waveform to obtain the integral value of the reconstructed waveform;
步骤S42,计算任一馈线的高次累加重构波形积分值与其他馈线的高次累加重构波形积分值的比值是否大于所设阈值;Step S42, calculate whether the ratio of the high-order accumulated reconstructed waveform integral value of any feeder to the high-order accumulated reconstructed waveform integral value of other feeders is greater than the set threshold;
步骤S43,若大于,则判断所述馈线为故障馈线;Step S43, if it is greater than 1, determine that the feeder is a faulty feeder;
式中:为馈线进行高次累加后的波形积分值,为馈线进行高次累加后的波 形积分值,和为配电网中任一馈线,有条馈线,为积分之比阈值,一般取为1.5,满足 上式,则第条馈线为故障馈线。 In the formula: for feeder The integrated value of the waveform after high-order accumulation, for feeder The integrated value of the waveform after high-order accumulation, and For any feeder in the distribution network, there are feeder line, is the integral ratio threshold, which is generally taken as 1.5. If the above formula is satisfied, then the The feeder is a faulty feeder.
步骤S44,若比值小于所设阈值,则判断第条馈线为健全馈线。 Step S44, if the ratio is less than the set threshold, determine whether the The feeders are sound feeders.
可选地,在本实施例中,利用故障线路高次累加波形的积分值与健全馈线高次累加波形的积分值的大小值,构成选线判据。Optionally, in this embodiment, the line selection criterion is formed by using the integral value of the high-order accumulated waveform of the faulty line and the integral value of the high-order accumulated waveform of the healthy feeder.
需要注意的是,为保证数据的准确性和稳定性,应选用高精度的电压传感器和电流传感器,并对数据进行合理滤波和校正。另外,预设周期的选择应根据具体情况进行调整,以充分保证数据的完整性和准确性。It should be noted that in order to ensure the accuracy and stability of the data, high-precision voltage sensors and current sensors should be selected, and the data should be reasonably filtered and corrected. In addition, the selection of the preset period should be adjusted according to the specific situation to fully ensure the integrity and accuracy of the data.
示例性地,设母线零序电压为,电压阈值为,其中,一般取0.15, 表示母线额定电压。 For example, let the bus zero sequence voltage be , the voltage threshold is ,in, Generally take 0.15, Indicates the rated voltage of the busbar.
若大于,则故障选线装置立刻启动,记录下故障发生后一个周波的零 序电流。 like more than the , the fault line selection device starts immediately and records the zero-sequence current of one cycle after the fault occurs.
需要说明的是,实际应用中需要考虑更多的细节和特殊情况。例如,还需要考虑噪声滤波、采样频率和数据精度等方面的问题。It should be noted that more details and special circumstances need to be considered in practical applications. For example, issues such as noise filtering, sampling frequency, and data accuracy also need to be considered.
在本实施例中,当母线零序电压的瞬时值大于预设的电压阈值,初步判断配电网中出现故障,则启动故障录波选线装置来执行前述实施例中所述的基于波形高次累加重构的配电网故障选线方法中的相关步骤,与前述的基于波形高次累加重构的配电网故障选线方法相结合,可以实现准确选线。In this embodiment, when the instantaneous value of the bus zero-sequence voltage is greater than the preset voltage threshold and it is initially determined that a fault occurs in the distribution network, the fault recording line selection device is started to perform the waveform high-voltage selection method based on the waveform high as described in the previous embodiment. The relevant steps in the distribution network fault line selection method based on sub-accumulation reconstruction can be combined with the aforementioned distribution network fault line selection method based on waveform high-order accumulation reconstruction to achieve accurate line selection.
此外,本领域普通技术人员可以理解的是实现实施例的方法中的全部或部分流程,是可以通过计算机程序驱动相关的硬件来完成。该计算机程序包括程序指令,计算机程序可以存储于一存储介质中,该存储介质为计算机可读存储介质。该程序指令被配电网的故障选线系统中的至少一个处理器执行,以实现上述方法的实施例的流程步骤。In addition, those of ordinary skill in the art can understand that all or part of the processes in the methods of implementing the embodiments can be completed by driving relevant hardware through computer programs. The computer program includes program instructions, and the computer program can be stored in a storage medium, and the storage medium is a computer-readable storage medium. The program instructions are executed by at least one processor in the fault line selection system of the distribution network to implement the process steps of the embodiments of the above method.
因此,本发明还提供一种计算机可读存储介质,所述计算机可读存储介质存储有配电网的故障选线程序,所述配电网的故障选线程序被处理器执行时实现如上实施例所述的基于波形高次累加重构的配电网故障选线方法的各步骤。Therefore, the present invention also provides a computer-readable storage medium. The computer-readable storage medium stores a fault line selection program of the distribution network. When the fault line selection program of the distribution network is executed by the processor, the above implementation is implemented. Each step of the distribution network fault line selection method based on high-order accumulation and reconstruction of waveforms described in the example.
其中,所述计算机可读存储介质可以是U盘、移动硬盘、只读存储器(Read-OnlyMemory,ROM)、磁碟或者光盘等各种可以存储程序代码的计算机可读存储介质。Wherein, the computer-readable storage medium can be a USB flash drive, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a magnetic disk or an optical disk, and other computer-readable storage media that can store program codes.
需要说明的是,由于本申请实施例提供的存储介质,为实施本申请实施例的方法所采用的存储介质,故而基于本申请实施例所介绍的方法,本领域所属人员能够了解该存储介质的具体结构及变形,故而在此不再赘述。凡是本申请实施例的方法所采用的存储介质都属于本申请所欲保护的范围。It should be noted that since the storage medium provided by the embodiment of the present application is the storage medium used to implement the method of the embodiment of the present application, based on the method introduced by the embodiment of the present application, those skilled in the art can understand the storage medium. The specific structure and deformation will not be described again here. All storage media used in the methods of the embodiments of this application fall within the scope of protection of this application.
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems or computer program products. Thus, the invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions executed by the processor of the computer or other programmable data processing device produce a use A device for realizing the functions specified in a process or processes in a flowchart and/or a block or blocks in a block diagram.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions The device implements the functions specified in a process or processes in the flowchart and/or in a block or blocks in the block diagram.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device. Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.
应当注意的是,在权利要求中,不应将位于括号之间的任何参考符号构造成对权利要求的限制。单词“包含”不排除存在未列在权利要求中的部件或步骤。位于部件之前的单词“一”或“一个”不排除存在多个这样的部件。本发明可以借助于包括有若干不同部件的硬件以及借助于适当编程的计算机来实现。在列举了若干装置的单元权利要求中,这些装置中的若干个可以是通过同一个硬件项来具体体现。单词第一、第二、以及第三等的使用不表示任何顺序。可将这些单词解释为名称。It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In the element claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, third, etc. does not indicate any order. These words can be interpreted as names.
尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例做出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。Although the preferred embodiments of the present invention have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once the basic inventive concepts are apparent. Therefore, it is intended that the appended claims be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the invention.
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention is also intended to include these modifications and variations.
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Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013007051A1 (en) * | 2011-07-13 | 2013-01-17 | 国网电力科学研究院 | Residual-variable-based line selection method for small current grounding |
CN103018627A (en) * | 2012-10-25 | 2013-04-03 | 福建省电力有限公司 | Adaptive fault type fault line detection method for non-effectively earthed system |
CN103675602A (en) * | 2013-12-03 | 2014-03-26 | 昆明理工大学 | Method for discriminating lightning flashover and non-flashover of power transmission lines |
CN109347069A (en) * | 2018-09-25 | 2019-02-15 | 深圳供电局有限公司 | Method and system for controlling zero sequence IV section protection of 220kV line |
US20190137557A1 (en) * | 2015-09-09 | 2019-05-09 | Beijing Inhand Networks Technology Co., Ltd. | Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network |
EP3544135A1 (en) * | 2018-03-21 | 2019-09-25 | Siemens Aktiengesellschaft | Method and device for determining a faulty line in a power system compensation grid |
CN112067948A (en) * | 2020-10-14 | 2020-12-11 | 长沙理工大学 | Fault line selection method, system and terminal for single-phase earth fault of power distribution network and readable storage medium |
CN112083286A (en) * | 2020-09-07 | 2020-12-15 | 昆明理工大学 | Single-phase earth fault line selection method for wind power plant collecting line based on zero sequence current waveform similarity |
CN115980516A (en) * | 2023-03-15 | 2023-04-18 | 昆明理工大学 | A method and system for fault line selection of distribution network based on waveform similarity |
CN116466185A (en) * | 2023-04-24 | 2023-07-21 | 福州大学 | Intelligent threshold-free positioning method for single-phase ground fault section of power distribution network |
CN117192276A (en) * | 2023-06-30 | 2023-12-08 | 国网福建省电力有限公司电力科学研究院 | Distribution network single-phase earth fault line selection method based on selected frequency band relative information entropy |
-
2024
- 2024-01-31 CN CN202410133889.4A patent/CN117686843B/en active Active
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013007051A1 (en) * | 2011-07-13 | 2013-01-17 | 国网电力科学研究院 | Residual-variable-based line selection method for small current grounding |
CN103018627A (en) * | 2012-10-25 | 2013-04-03 | 福建省电力有限公司 | Adaptive fault type fault line detection method for non-effectively earthed system |
CN103675602A (en) * | 2013-12-03 | 2014-03-26 | 昆明理工大学 | Method for discriminating lightning flashover and non-flashover of power transmission lines |
US20190137557A1 (en) * | 2015-09-09 | 2019-05-09 | Beijing Inhand Networks Technology Co., Ltd. | Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network |
EP3544135A1 (en) * | 2018-03-21 | 2019-09-25 | Siemens Aktiengesellschaft | Method and device for determining a faulty line in a power system compensation grid |
CN109347069A (en) * | 2018-09-25 | 2019-02-15 | 深圳供电局有限公司 | Method and system for controlling zero sequence IV section protection of 220kV line |
CN112083286A (en) * | 2020-09-07 | 2020-12-15 | 昆明理工大学 | Single-phase earth fault line selection method for wind power plant collecting line based on zero sequence current waveform similarity |
CN112067948A (en) * | 2020-10-14 | 2020-12-11 | 长沙理工大学 | Fault line selection method, system and terminal for single-phase earth fault of power distribution network and readable storage medium |
CN115980516A (en) * | 2023-03-15 | 2023-04-18 | 昆明理工大学 | A method and system for fault line selection of distribution network based on waveform similarity |
CN116466185A (en) * | 2023-04-24 | 2023-07-21 | 福州大学 | Intelligent threshold-free positioning method for single-phase ground fault section of power distribution network |
CN117192276A (en) * | 2023-06-30 | 2023-12-08 | 国网福建省电力有限公司电力科学研究院 | Distribution network single-phase earth fault line selection method based on selected frequency band relative information entropy |
Non-Patent Citations (3)
Title |
---|
唐轶;陈庆;: "基于零序暂态电流方向判断的小电流接地选线方法", 电网技术, no. 19, 5 October 2007 (2007-10-05) * |
束洪春等: "利用零序电流全量Hough变换的配电网故障选线方法", 电力系统自动化, 8 January 2013 (2013-01-08) * |
陈洲;陈丹;吕元龙;王鹏程;: "小电流接地系统故障选线方法综述", 水利电力机械, no. 10, 25 October 2007 (2007-10-25) * |
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