CN107167709A - A kind of electric network fault localization method and alignment system - Google Patents
A kind of electric network fault localization method and alignment system Download PDFInfo
- Publication number
- CN107167709A CN107167709A CN201710549646.9A CN201710549646A CN107167709A CN 107167709 A CN107167709 A CN 107167709A CN 201710549646 A CN201710549646 A CN 201710549646A CN 107167709 A CN107167709 A CN 107167709A
- Authority
- CN
- China
- Prior art keywords
- phase
- zero
- monitoring
- power grid
- phase current
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000004807 localization Effects 0.000 title claims description 4
- 238000012544 monitoring process Methods 0.000 claims abstract description 90
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 11
- 238000011835 investigation Methods 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000013024 troubleshooting Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Locating Faults (AREA)
Abstract
本发明公开了一种电网故障定位方法和电网故障定位系统，其中，电网故障定位方法包括以下步骤：设置监测点，并采集每个监测点处的三相线路上的瞬时电流信息；计算每个监测点的零序电流；根据零序电流值判断电网是否有故障；根据相邻监测点的零序电流相位差判定故障位置。所述电网故障定位系统包括沿电网三相线路间隔设置的监测单元和与所述监测单元连接的工作站监控中心。相比于现有技术，本发明提出的电网故障定位方法和电网故障定位系统，故障定位及时，可精准的反馈电网故障点，无需进行进一步的人工排查，大大降低了维修成本，提高电网故障维修效率，值得推广。
The invention discloses a power grid fault location method and a power grid fault location system, wherein the power grid fault location method includes the following steps: setting monitoring points, and collecting instantaneous current information on three-phase lines at each monitoring point; calculating each The zero-sequence current of the monitoring point; judge whether there is a fault in the power grid according to the zero-sequence current value; judge the fault location according to the zero-sequence current phase difference of adjacent monitoring points. The grid fault location system includes a monitoring unit arranged at intervals along the three-phase line of the grid and a workstation monitoring center connected to the monitoring unit. Compared with the prior art, the power grid fault location method and the power grid fault location system proposed by the present invention can locate the fault in a timely manner and can accurately feed back the fault point of the power grid without further manual investigation, which greatly reduces the maintenance cost and improves the power grid fault maintenance. Efficiency is worth promoting.
Description
技术领域technical field
本发明涉及电能监测技术领域，尤其涉及一种电网故障定位方法及定位系统。The invention relates to the technical field of electric energy monitoring, in particular to a power grid fault location method and a location system.
背景技术Background technique
配电是电力系统中直接与用户相连并向用户分配电能的环节。配电站即由配电变电所(通常是将电网的输电电压降为配电电压)、高压配电线路(即1千伏以上电压)、配电变压器、低压配电线路(1千伏以下电压)以及相应的控制保护设备组成，配电电压通常有35～60千伏和3～10千伏等。我国配电网中性点不接地，属于小电流接地系统。配电网在实际运行中，有时会发生接地和短路故障，一般发生接地故障较多，特别是在雷雨、大风等恶劣自然天气的时候，单相接地故障发生的几率比较频繁。虽然单相接地后，故障相对地电压降低，非故障相电压升高，电压依然对称，不影响用户供电，但是，单相接地长时间运行会严重影响变电设备和配电网安全经济运行。因此，发生单相接地后也需要将线路停电，查找故障，特别是在选线的时候，会造成无故障线路的停电，造成供电可靠性的降低。因此，配电网故障的处理要求及时、准确。现有的电网故障定位方法，故障定位耗时较长，精准度不高，且无法精准的反馈电网故障点，常需要进行进一步的人工排查，造成了人力和抢修时间的双重浪费，电网故障维修效率低。Power distribution is the link in the power system that is directly connected to users and distributes electric energy to users. The distribution substation consists of a distribution substation (usually reducing the transmission voltage of the grid to a distribution voltage), a high-voltage distribution line (that is, a voltage above 1 kV), a distribution transformer, and a low-voltage distribution line (1 kV The following voltage) and corresponding control and protection equipment, the distribution voltage is usually 35-60 kV and 3-10 kV. The neutral point of my country's distribution network is not grounded, which belongs to the small current grounding system. In the actual operation of the distribution network, grounding and short-circuit faults sometimes occur. Generally, there are more grounding faults. Especially in severe natural weather such as thunderstorms and strong winds, the probability of single-phase grounding faults is relatively frequent. Although after the single-phase grounding, the voltage of the fault phase ground decreases, the voltage of the non-fault phase rises, the voltage is still symmetrical, and does not affect the power supply of users, but the long-term operation of the single-phase grounding will seriously affect the safe and economic operation of the substation equipment and the distribution network. Therefore, after a single-phase grounding occurs, it is also necessary to cut off the power of the line to find the fault, especially when selecting the line, which will cause a power outage of the non-faulty line and reduce the reliability of the power supply. Therefore, the processing of distribution network faults requires timely and accurate. The existing power grid fault location method takes a long time to locate the fault, the accuracy is not high, and it is impossible to accurately feed back the fault point of the power grid. Further manual investigation is often required, resulting in a double waste of manpower and emergency repair time. low efficiency.
发明内容Contents of the invention
鉴于此，本发明的提供了一种电网故障定位方法及定位系统，以解决现有电网故障定位方法需要人工排查，维修成本高，电网故障维修效率低等问题。In view of this, the present invention provides a grid fault locating method and a locating system to solve the problems that the existing grid fault locating method requires manual investigation, high maintenance cost, and low grid fault maintenance efficiency.
本发明一方面提供了一种电网故障定位方法，包括以下步骤：One aspect of the present invention provides a grid fault location method, comprising the following steps:
(1)在电网三相线路上间隔设置监测点，并采集每个监测点处的三相线路上的瞬时电流信息；(1) Set monitoring points at intervals on the three-phase lines of the power grid, and collect instantaneous current information on the three-phase lines at each monitoring point;
(2)根据所述瞬时电流信息计算每个监测点的零序电流；(2) Calculate the zero-sequence current of each monitoring point according to the instantaneous current information;
(3)将计算得到的各监测点的零序电流值与预设的零序电流阈值进行比较，若计算得到的零序电流值小于预先设定的零序电流阈值时，则判定电网无故障，若计算得到的零序电流值大于或等于预先设定的零序电流阈值时，则判定电网有故障；(3) Compare the calculated zero-sequence current value of each monitoring point with the preset zero-sequence current threshold, and if the calculated zero-sequence current value is less than the preset zero-sequence current threshold, it is determined that the grid has no faults , if the calculated zero-sequence current value is greater than or equal to the preset zero-sequence current threshold, it is determined that the power grid is faulty;
(4)若步骤(3)中判定电网有故障，计算相邻监测点的零序电流相位差，若相邻监测点的零序电流相位差为0°时，则判定相邻监测点之间无故障，若相邻监测点的零序电流相位差为180°时，则判定相邻监测点之间有故障。(4) If it is determined in step (3) that there is a fault in the power grid, calculate the zero-sequence current phase difference between adjacent monitoring points. If the zero-sequence current phase difference between adjacent monitoring points is 0°, then determine If there is no fault, if the zero-sequence current phase difference of adjacent monitoring points is 180°, it is determined that there is a fault between adjacent monitoring points.
优选，所述步骤(1)中各监测点处的三相线路上的瞬时电流信息分别通过设置于三相线路上的电流互感器检测。Preferably, the instantaneous current information on the three-phase lines at each monitoring point in the step (1) is respectively detected by current transformers arranged on the three-phase lines.
进一步优选，所述步骤(2)中各个监测点的零序电流通过将该监测点处的三相线路上的瞬时电流相加获得。Further preferably, the zero-sequence current of each monitoring point in the step (2) is obtained by adding the instantaneous currents on the three-phase lines at the monitoring point.
进一步优选，所述步骤(4)中的相邻监测点的零序电流相位差θ1，2计算公式为：θ1，2＝(n1-n2)*36°，其中，n1表示相邻监测点中的第一监测点的零序电流，n2表示相邻监测点中的第二监测点的零序电流。Further preferably, the formula for calculating the zero-sequence current phase difference θ 1,2 of adjacent monitoring points in the step (4) is: θ 1,2 =(n 1 -n 2 )*36°, where n 1 represents The zero-sequence current of the first monitoring point among the adjacent monitoring points, n 2 represents the zero-sequence current of the second monitoring point among the adjacent monitoring points.
本发明还提供了一种电网故障定位系统，包括：沿电网三相线路间隔设置的监测单元和与所述监测单元连接的工作站监控中心，其中，所述监测单元包括分别设置于三相线路上的A相电流互感器、B相电流互感器、C相电流互感器，A相电流互感器、B相电流互感器、C相电流互感器分别连接A相电流传感器、B相电流传感器、C相电流传感器，A相电流传感器、B相电流传感器、C相电流传感器均与单片机连接，各监测单元中的单片机均与工作站监控中心连接，其中，A相电流互感器、B相电流互感器、C相电流互感器分别通过A相电流传感器、B相电流传感器、C相电流传感器将采集到的瞬时电流信息发送至单片机，单片机接收到上述信息后，计算出该监测点的零序电流，并将所述零序电流信息发送至工作站监控中心，工作站监控中心接收到所述零序电流信息后，进一步判定故障位置。The present invention also provides a power grid fault location system, including: monitoring units arranged at intervals along the three-phase lines of the power grid and a workstation monitoring center connected to the monitoring units, wherein the monitoring units include Phase A current transformer, B phase current transformer, C phase current transformer, A phase current transformer, B phase current transformer, C phase current transformer are respectively connected to A phase current sensor, B phase current sensor, C phase current sensor Current sensors, A-phase current sensor, B-phase current sensor, and C-phase current sensor are all connected to the single-chip microcomputer, and the single-chip microcomputer in each monitoring unit is connected to the workstation monitoring center, wherein, A-phase current transformer, B-phase current transformer, C The phase current transformer sends the collected instantaneous current information to the single-chip microcomputer through the A-phase current sensor, B-phase current sensor, and C-phase current sensor respectively. After the single-chip computer receives the above information, it calculates the zero-sequence current of the monitoring point and sends The zero-sequence current information is sent to the workstation monitoring center, and the workstation monitoring center further determines the fault location after receiving the zero-sequence current information.
优选，所述电网故障定位系统还包括与工作站监控中心连接的存储单元，用于存储预设的零序电流阈值。Preferably, the power grid fault location system further includes a storage unit connected to the workstation monitoring center for storing the preset zero-sequence current threshold.
进一步优选，A相电流互感器、B相电流互感器、C相电流互感器分别通过无线传输模块连接A相电流传感器、B相电流传感器、C相电流传感器，A相电流传感器、B相电流传感器、C相电流传感器均与单片机通过无线传输模块连接。Further preferably, the A-phase current transformer, the B-phase current transformer, and the C-phase current transformer are respectively connected to the A-phase current sensor, the B-phase current sensor, the C-phase current sensor, the A-phase current sensor, and the B-phase current sensor through the wireless transmission module , C-phase current sensors are all connected with the single chip microcomputer through the wireless transmission module.
进一步优选，各监测单元中的单片机均与工作站监控中心通过无线传输模块连接。Further preferably, the single-chip microcomputers in each monitoring unit are connected to the monitoring center of the workstation through a wireless transmission module.
本发明提供的电网故障定位方法能实时对电网线路进行故障监测，通过在电网三相线路上间隔设置监测点，并检测每个监测点处的三相线路上的瞬时电流信息，可以实时获得三相线路上的瞬时电流信息，通过上述瞬时电流信息可以得到每个监测点的零序电流，通过将计算的零序电流值与预设的零序电流阈值进行比较，可以判定电网是否有故障，若电网有故障，通过进一步计算相邻监测点的零序电流相位差，可以判定电网故障的位置，减少了工作人员的巡视和故障排查时间，维修及时，且工作站电网维修人员可对故障路线进行单独维修，维修效率高，劳动强度小，降低了故障影响，保证了正常线路的正常供电。The power grid fault location method provided by the invention can monitor the faults of the power grid lines in real time. By setting monitoring points at intervals on the three-phase lines of the power grid and detecting the instantaneous current information on the three-phase lines at each monitoring point, the three-phase current information can be obtained in real time. The instantaneous current information on the phase line, the zero-sequence current of each monitoring point can be obtained through the above-mentioned instantaneous current information, and by comparing the calculated zero-sequence current value with the preset zero-sequence current threshold, it can be determined whether there is a fault in the power grid, If there is a fault in the power grid, by further calculating the zero-sequence current phase difference of adjacent monitoring points, the location of the fault in the power grid can be determined, which reduces the time for inspection and troubleshooting of the staff, and timely maintenance, and the grid maintenance personnel of the workstation can carry out the fault route. Independent maintenance, high maintenance efficiency, low labor intensity, reducing the impact of failures, and ensuring the normal power supply of normal lines.
本发明提供的电网故障定位系统，通过电流互感器可以实时检测三相线路的瞬时电流信息，通过与电流互感器连接的电流传感器可以将所述瞬时电流信息发送至单片机，单片机接收到上述信息后，可以计算出该监测点的零序电流，并将所述零序电流信息发送至工作站监控中心，工作站监控中心接收到所述零序电流信息后，通过与预设的零序电流阈值进行比较，可以判定电网是否有故障，若电网有故障，通过进一步计算相邻监测点的零序电流相位差可以判定故障位置。The power grid fault location system provided by the present invention can detect the instantaneous current information of the three-phase line in real time through the current transformer, and can send the instantaneous current information to the single-chip microcomputer through the current sensor connected with the current transformer, and the single-chip microcomputer receives the above-mentioned information. , can calculate the zero-sequence current of the monitoring point, and send the zero-sequence current information to the workstation monitoring center. After the workstation monitoring center receives the zero-sequence current information, it compares it with the preset zero-sequence current threshold , can determine whether there is a fault in the power grid, and if there is a fault in the power grid, the fault location can be determined by further calculating the zero-sequence current phase difference of adjacent monitoring points.
附图说明Description of drawings
图1为本发明提出的电网故障定位方法的流程图；Fig. 1 is the flowchart of the grid fault location method that the present invention proposes;
图2为本发明提出的电网故障定位系统的结构框图；Fig. 2 is the block diagram of the grid fault location system that the present invention proposes;
图3为监测单元的结构示意图。Fig. 3 is a schematic structural diagram of the monitoring unit.
具体实施方式detailed description
下面将结合具体的实施方案对本发明进行进一步的解释，但并不局限本发明。The present invention will be further explained below in conjunction with specific embodiments, but the present invention is not limited thereto.
如图1所示，本发明提供了一种电网故障定位方法，包括以下步骤：As shown in Fig. 1, the present invention provides a kind of grid fault localization method, comprises the following steps:
(1)在电网三相线路上间隔设置监测点，并采集每个监测点处的三相线路上的瞬时电流信息；(1) Set monitoring points at intervals on the three-phase lines of the power grid, and collect instantaneous current information on the three-phase lines at each monitoring point;
(2)根据所述瞬时电流信息计算每个监测点的零序电流；(2) Calculate the zero-sequence current of each monitoring point according to the instantaneous current information;
(3)将计算得到的各监测点的零序电流值与预设的零序电流阈值进行比较，若计算得到的零序电流值小于预先设定的零序电流阈值时，则判定电网无故障，若计算得到的零序电流值大于或等于预先设定的零序电流阈值时，则判定电网有故障；(3) Compare the calculated zero-sequence current value of each monitoring point with the preset zero-sequence current threshold, and if the calculated zero-sequence current value is less than the preset zero-sequence current threshold, it is determined that the grid has no faults , if the calculated zero-sequence current value is greater than or equal to the preset zero-sequence current threshold, it is determined that the power grid is faulty;
(4)若步骤(3)中判定电网有故障，计算相邻监测点的零序电流相位差，若相邻监测点的零序电流相位差为0°时，则判定相邻监测点之间无故障，若相邻监测点的零序电流相位差为180°时，则判定相邻监测点之间有故障。(4) If it is determined in step (3) that there is a fault in the power grid, calculate the zero-sequence current phase difference between adjacent monitoring points. If the zero-sequence current phase difference between adjacent monitoring points is 0°, then determine If there is no fault, if the zero-sequence current phase difference of adjacent monitoring points is 180°, it is determined that there is a fault between adjacent monitoring points.
该电网故障定位方法能实时对电网线路进行故障监测，通过在电网三相线路上间隔设置监测点，并检测每个监测点处的三相线路上的瞬时电流信息，可以实时获得三相线路上的瞬时电流信息，通过上述瞬时电流信息可以得到每个监测点的零序电流，通过将计算的零序电流值与预设的零序电流阈值进行比较，可以判定电网是否有故障，若电网有故障，通过进一步计算相邻监测点的零序电流相位差，可以判定电网故障的位置，减少了工作人员的巡视和故障排查时间，维修及时，且工作站电网维修人员可对故障路线进行单独维修，维修效率高，劳动强度小，降低了故障影响，保证了正常线路的正常供电。The fault location method of the power grid can monitor the faults of the power grid lines in real time. By setting monitoring points at intervals on the three-phase lines of the power grid and detecting the instantaneous current information on the three-phase lines at each monitoring point, the faults on the three-phase lines can be obtained in real time. The instantaneous current information of each monitoring point can be obtained through the above instantaneous current information. By comparing the calculated zero-sequence current value with the preset zero-sequence current threshold, it can be determined whether there is a fault in the power grid. Fault, by further calculating the zero-sequence current phase difference of adjacent monitoring points, the location of the grid fault can be determined, which reduces the staff's inspection and troubleshooting time, timely maintenance, and the grid maintenance personnel of the workstation can repair the fault line separately. The maintenance efficiency is high, the labor intensity is small, the fault impact is reduced, and the normal power supply of the normal line is guaranteed.
其中，所述步骤(1)中各监测点处的三相线路上的瞬时电流信息分别通过设置于三相线路上的电流互感器检测。Wherein, the instantaneous current information on the three-phase lines at each monitoring point in the step (1) is respectively detected by the current transformers arranged on the three-phase lines.
其中，所述步骤(2)中各个监测点的零序电流通过将该监测点处的三相线路上的瞬时电流相加获得。Wherein, the zero-sequence current of each monitoring point in the step (2) is obtained by adding the instantaneous currents on the three-phase lines at the monitoring point.
其中，所述步骤(4)中的相邻监测点的零序电流相位差θ1，2计算公式为：θ1，2＝(n1-n2)*36°，其中，n1表示相邻监测点中的第一监测点的零序电流，n2表示相邻监测点中的第二监测点的零序电流。Wherein, the zero-sequence current phase difference θ 1,2 of adjacent monitoring points in the step (4) is calculated as follows: θ 1,2 =(n 1 -n 2 )*36°, where n 1 represents phase The zero-sequence current of the first monitoring point among the adjacent monitoring points, n 2 represents the zero-sequence current of the second monitoring point among the adjacent monitoring points.
如图2、图3所示，本发明提供了一种电网故障定位系统，包括：沿电网三相线路间隔设置的监测单元1和与所述监测单元1连接的工作站监控中心2，其中，所述监测单元1包括分别设置于三相线路上的A相电流互感器11、B相电流互感器12、C相电流互感器13，A相电流互感器11、B相电流互感器12、C相电流互感器13分别连接A相电流传感器14、B相电流传感器15、C相电流传感器16，A相电流传感器14、B相电流传感器15、C相电流传感器16均与单片机17连接，各监测单元1中的单片机17均与工作站监控中心2连接，其中，A相电流互感器11、B相电流互感器12、C相电流互感器13分别通过A相电流传感器14、B相电流传感器15、C相电流传感器16将采集到的瞬时电流信息发送至单片机17，单片机17接收到上述信息后，计算出该监测点的零序电流，并将所述零序电流信息发送至工作站监控中心2，工作站监控中心2接收到所述零序电流信息后，进一步判定故障位置。As shown in Fig. 2 and Fig. 3, the present invention provides a power grid fault location system, including: a monitoring unit 1 arranged at intervals along the three-phase line of the power grid and a workstation monitoring center 2 connected to the monitoring unit 1, wherein the The monitoring unit 1 includes A-phase current transformer 11, B-phase current transformer 12, C-phase current transformer 13 respectively arranged on the three-phase line, A-phase current transformer 11, B-phase current transformer 12, C-phase Current transformer 13 connects A-phase current sensor 14, B-phase current sensor 15, C-phase current sensor 16 respectively, and A-phase current sensor 14, B-phase current sensor 15, C-phase current sensor 16 are all connected with single-chip microcomputer 17, each monitoring unit The single-chip microcomputers 17 in 1 are all connected to the workstation monitoring center 2, wherein, the A-phase current transformer 11, the B-phase current transformer 12, and the C-phase current transformer 13 pass through the A-phase current sensor 14, the B-phase current sensor 15, and the C-phase current sensor 15 respectively. The phase current sensor 16 sends the collected instantaneous current information to the single-chip microcomputer 17, and the single-chip microcomputer 17 calculates the zero-sequence current of the monitoring point after receiving the above-mentioned information, and sends the zero-sequence current information to the workstation monitoring center 2, the workstation After receiving the zero-sequence current information, the monitoring center 2 further determines the fault location.
该电网故障定位系统，通过电流互感器可以实时检测三相线路的瞬时电流信息，通过与电流互感器连接的电流传感器可以将所述瞬时电流信息发送至单片机，单片机接收到上述信息后，可以计算出该监测点的零序电流，并将所述零序电流信息发送至工作站监控中心，工作站监控中心接收到所述零序电流信息后，通过与预设的零序电流阈值进行比较，可以判定电网是否有故障，若电网有故障，通过进一步计算相邻监测点的零序电流相位差可以判定故障位置。The power grid fault location system can detect the instantaneous current information of the three-phase line in real time through the current transformer, and can send the instantaneous current information to the single-chip microcomputer through the current sensor connected with the current transformer. After the single-chip computer receives the above information, it can calculate The zero-sequence current of the monitoring point is obtained, and the zero-sequence current information is sent to the workstation monitoring center. After the workstation monitoring center receives the zero-sequence current information, it can determine Whether there is a fault in the power grid, if there is a fault in the power grid, the fault location can be determined by further calculating the zero-sequence current phase difference of adjacent monitoring points.
具体地：电网是否有故障的判定方法如下：将接收到零序电流值与预设的零序电流阈值进行比较，若接收到的零序电流值小于预设的零序电流阈值，则判定电网无故障，若接收到的零序电流值大于或等于预设的零序电流阈值，则判定电网有故障。Specifically: the method of judging whether the power grid has a fault is as follows: compare the received zero-sequence current value with the preset zero-sequence current threshold, and if the received zero-sequence current value is less than the preset zero-sequence current threshold, then determine the power grid No fault, if the received zero-sequence current value is greater than or equal to the preset zero-sequence current threshold, it is determined that the grid is faulty.
故障位置的判定方法如下：计算相邻监测点的零序电流相位差，若相邻监测点的零序电流相位差为0°时，则判定相邻监测点之间无故障，若相邻监测点的零序电流相位差为180°时，则判定相邻监测点之间有故障。The method of judging the fault location is as follows: Calculate the zero-sequence current phase difference of adjacent monitoring points. If the zero-sequence current phase difference of adjacent monitoring points is 0°, it is determined that there is no fault between adjacent monitoring points. When the zero-sequence current phase difference of the point is 180°, it is determined that there is a fault between adjacent monitoring points.
作为技术方案的改进，如图2所示，电网故障定位系统还包括与工作站监控中心2连接的存储单元3，用于存储预设的零序电流阈值，根据需要，可以通过输入设备对存储单元中预设的零序电流阈值进行更改。As an improvement of the technical solution, as shown in Figure 2, the power grid fault location system also includes a storage unit 3 connected to the workstation monitoring center 2, which is used to store the preset zero-sequence current threshold. Change the zero-sequence current threshold preset in .
其中，A相电流互感器11、B相电流互感器12、C相电流互感器13分别通过无线传输模块连接A相电流传感器14、B相电流传感器15、C相电流传感器16，A相电流传感器14、B相电流传感器15、C相电流传感器16均与单片机17通过无线传输模块连接。Among them, the A-phase current transformer 11, the B-phase current transformer 12, and the C-phase current transformer 13 are respectively connected to the A-phase current sensor 14, the B-phase current sensor 15, the C-phase current sensor 16, and the A-phase current sensor through the wireless transmission module. 14. Both the B-phase current sensor 15 and the C-phase current sensor 16 are connected to the single-chip microcomputer 17 through a wireless transmission module.
其中，各监测单元1中的单片机17均与工作站监控中心2通过无线传输模块连接。Wherein, the single-chip microcomputer 17 in each monitoring unit 1 is connected with the workstation monitoring center 2 through a wireless transmission module.
本发明的具体实施方式是按照递进的方式进行撰写的，着重强调各个实施方案的不同之处，其相似部分可以相互参见。The specific embodiments of the present invention are written in a progressive manner, emphasizing the differences of each embodiment, and the similar parts can be referred to each other.
上面结合附图对本发明的实施方式做了详细说明，但是本发明并不限于上述实施方式，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下作出各种变化。The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge of those of ordinary skill in the art, various modifications can be made without departing from the gist of the present invention. kind of change.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710549646.9A CN107167709A (en) | 2017-07-07 | 2017-07-07 | A kind of electric network fault localization method and alignment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710549646.9A CN107167709A (en) | 2017-07-07 | 2017-07-07 | A kind of electric network fault localization method and alignment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107167709A true CN107167709A (en) | 2017-09-15 |
Family
ID=59823147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710549646.9A Pending CN107167709A (en) | 2017-07-07 | 2017-07-07 | A kind of electric network fault localization method and alignment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107167709A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470991A (en) * | 2018-10-29 | 2019-03-15 | 中电普瑞科技有限公司 | A kind of power system line fault identification method and system |
| CN109613383A (en) * | 2018-12-27 | 2019-04-12 | 中国电力科学研究院有限公司 | AC line fault judgment method and system considering DC access |
| CN109839568A (en) * | 2019-02-25 | 2019-06-04 | 国家电网有限公司 | Transmission line malfunction diagnostic system based on zero-sequence current detection |
| CN110518702A (en) * | 2019-09-09 | 2019-11-29 | 陕西省地方电力(集团)有限公司西安供电分公司 | Line feed terminals, feeder line control system and power network monitoring method |
| CN110672979A (en) * | 2019-10-21 | 2020-01-10 | 广州航海学院 | Power distribution network line fault diagnosis system and method |
| CN112180206A (en) * | 2020-09-02 | 2021-01-05 | 中国电力科学研究院有限公司 | Power distribution network single-phase earth fault positioning method and device |
| CN112531767A (en) * | 2020-10-19 | 2021-03-19 | 国网辽宁省电力有限公司 | Neutral point grounding mode and single-phase grounding fault positioning method for medium-voltage island microgrid |
| CN114062837A (en) * | 2021-10-15 | 2022-02-18 | 中山市沃尔沃照明科技有限公司 | Urban road and park lighting system monitoring method and device based on big data |
| CN115575857A (en) * | 2022-12-08 | 2023-01-06 | 江西广凯新能源股份有限公司 | Emergency protection method and device for high-voltage wire breakage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0381675A (en) * | 1989-08-24 | 1991-04-08 | Fuji Electric Co Ltd | Starting system for fault point locating device |
| EP0933643A1 (en) * | 1998-02-02 | 1999-08-04 | Trench Austria GmbH | Procedure for fault localisation in AC networks |
| CN102928739A (en) * | 2012-11-02 | 2013-02-13 | 华北电力大学（保定） | Method and system used for locating power grid single-phase ground faults and based on wireless sensor network |
| CN103454559A (en) * | 2013-09-02 | 2013-12-18 | 国家电网公司 | Power distribution network single-phase earth fault zone positioning method and positioning device |
| CN103760465A (en) * | 2014-01-24 | 2014-04-30 | 泉州维盾电气有限公司 | Single-phase earth fault direction judgment and processing method of small current grounding system |
-
2017
- 2017-07-07 CN CN201710549646.9A patent/CN107167709A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0381675A (en) * | 1989-08-24 | 1991-04-08 | Fuji Electric Co Ltd | Starting system for fault point locating device |
| EP0933643A1 (en) * | 1998-02-02 | 1999-08-04 | Trench Austria GmbH | Procedure for fault localisation in AC networks |
| CN102928739A (en) * | 2012-11-02 | 2013-02-13 | 华北电力大学（保定） | Method and system used for locating power grid single-phase ground faults and based on wireless sensor network |
| CN103454559A (en) * | 2013-09-02 | 2013-12-18 | 国家电网公司 | Power distribution network single-phase earth fault zone positioning method and positioning device |
| CN103760465A (en) * | 2014-01-24 | 2014-04-30 | 泉州维盾电气有限公司 | Single-phase earth fault direction judgment and processing method of small current grounding system |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470991A (en) * | 2018-10-29 | 2019-03-15 | 中电普瑞科技有限公司 | A kind of power system line fault identification method and system |
| CN109613383A (en) * | 2018-12-27 | 2019-04-12 | 中国电力科学研究院有限公司 | AC line fault judgment method and system considering DC access |
| CN109839568A (en) * | 2019-02-25 | 2019-06-04 | 国家电网有限公司 | Transmission line malfunction diagnostic system based on zero-sequence current detection |
| CN110518702A (en) * | 2019-09-09 | 2019-11-29 | 陕西省地方电力(集团)有限公司西安供电分公司 | Line feed terminals, feeder line control system and power network monitoring method |
| CN110672979A (en) * | 2019-10-21 | 2020-01-10 | 广州航海学院 | Power distribution network line fault diagnosis system and method |
| CN110672979B (en) * | 2019-10-21 | 2021-12-07 | 广州航海学院 | Power distribution network line fault diagnosis system and method |
| CN112180206A (en) * | 2020-09-02 | 2021-01-05 | 中国电力科学研究院有限公司 | Power distribution network single-phase earth fault positioning method and device |
| CN112531767A (en) * | 2020-10-19 | 2021-03-19 | 国网辽宁省电力有限公司 | Neutral point grounding mode and single-phase grounding fault positioning method for medium-voltage island microgrid |
| CN114062837A (en) * | 2021-10-15 | 2022-02-18 | 中山市沃尔沃照明科技有限公司 | Urban road and park lighting system monitoring method and device based on big data |
| CN114062837B (en) * | 2021-10-15 | 2022-08-02 | 中山市沃尔沃照明科技有限公司 | Urban road and park lighting system monitoring method and device based on big data |
| CN115575857A (en) * | 2022-12-08 | 2023-01-06 | 江西广凯新能源股份有限公司 | Emergency protection method and device for high-voltage wire breakage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107167709A (en) | A kind of electric network fault localization method and alignment system | |
| CN103308823B (en) | A single-phase disconnection and non-ground fault location method for distribution network | |
| CN109655713B (en) | A single-phase ground fault location method and system | |
| CN102937675B (en) | The method of work of Real-time Electrical Distribution Network Data collection and fault location system | |
| CN205665347U (en) | 10kV distribution lines broken string fault detection and positioning system based on three phase voltage electric current | |
| CN103926510B (en) | A method for on-line monitoring and fault diagnosis and positioning of cable sheath current and ampacity | |
| CN104198884B (en) | Differential principle based large-scale power grid intelligent trouble diagnosis method | |
| CN102540017B (en) | Partition and segmentation on-line positioning method for small-current grounding faults | |
| CN106124935A (en) | Middle and low voltage network Fault Locating Method | |
| CN106501656A (en) | A kind of on-line acquisition system of distribution line failure waveform | |
| CN105866615A (en) | 10kV power distribution line disconnection fault judging method based on three-phase voltage current | |
| CN102565626A (en) | On-line positioning method and system of section with low-current ground faults | |
| CN105891680A (en) | 10kV distribution line multiphase disconnection fault determination method based on three-phase voltage and current | |
| CN110907750B (en) | Power distribution main station single-phase earth fault positioning method and system based on medium resistance method | |
| WO2023060705A1 (en) | Bus/line grounding line selection alternate removal method based on scada data | |
| CN106918758A (en) | A kind of small current neutral grounding faulty line selection method based on electrical quantity and non-electric quantity | |
| CN202854252U (en) | Real-time data acquisition and fault locating system of power distribution network | |
| CN109324263A (en) | An early fault location system for distribution network cable based on transient disturbance and its control method | |
| CN106501657A (en) | A kind of monitoring system of electric distribution network overhead wire failure | |
| CN102628914A (en) | Method for positioning grounding point of intelligent distribution line | |
| CN114936450A (en) | Digital twin evaluation method and system for dynamic capacity increase of wind power transmission line | |
| CN204666767U (en) | Transmission line malfunction on-line detecting system | |
| CN209513962U (en) | A kind of distribution network cable initial failure positioning system based on transient disturbance | |
| CN205333777U (en) | Phase to earth fault positioner | |
| CN113759207A (en) | Fault locating system and fault locating method for distribution line |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170915 |
|
| RJ01 | Rejection of invention patent application after publication |