Energy consumption type multi-column parallel lightning arrester

Abstract

The utility model discloses an energy-consuming multi-column parallel lightning arrester, which is characterized in that a plurality of resistor discs of the lightning arrester are connected in parallel, and the lightning arrester comprises a plurality of rows of parallel combinations generated by the plurality of resistor discs; the plurality of resistance sheets in each parallel combination in the plurality of parallel combinations are connected in series in a layered manner according to a preset number of layers, the lightning arrester comprises a plurality of series branches, and the number of layers is at least three; and each series branch of the lightning arrester is connected in series with a fuse. According to the energy consumption type multi-column parallel lightning arrester provided by the utility model, the fault rate of the lightning arrester can be reduced, or fault parts can be short-circuited, so that system shutdown caused by tripping or locking is avoided, and the reliability of a power transmission system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a direct current transmission system technical field more specifically, it relates to a kind of energy dissipation type multi-column shunt arrester. BACKGROUND

[0002] Energy dissipation type multi-column shunt arrester is widely used in direct current converter station, alternating current series compensation device and other fields, and the main role is to absorb system redundant energy, limit overvoltage.But this arrester is due to shunt column number, fault rate is always higher.

[0003] Traditional energy dissipation type multi-column shunt arrester generally uses "first series then parallel" structure, and each column resistance sheet is directly shunted with protected equipment.The advantages of this structure are simple structure, easy installation and low cost.But its shortcomings are also obvious: any column defect fault will directly short-circuit protected equipment, leading to alternating current system trip and direct current system lockout, seriously affect system power supply reliability.

[0004] Arrester operating current monitoring is one of the main means of multi-column shunt arrester operation and maintenance, but for many years there are problems such as unreasonable defect early warning criterion and poor actual effect, which have not effectively solved the problems. SUMMARY

[0005] The technical scheme of the present application provides an energy dissipation type multi-column shunt arrester to solve the problem of high fault rate of multi-column shunt arrester, causing trip or lockout, and leading to power transmission system shutdown.

[0006] In order to solve the above problems, the present application provides an energy dissipation type multi-column shunt arrester, characterized in that it comprises:

[0007] The multiple resistance sheets of the arrester are in parallel, and the arrester comprises multiple resistance sheets to form multiple parallel combinations;

[0008] The multiple resistance sheets in each parallel combination are layered and connected in series according to a preset number of layers, and the arrester comprises multiple series branches, wherein the number of layers is at least 3 layers;

[0009] Each series branch of the arrester is connected in series with a fuse.

[0010] Preferably, it comprises:

[0011] The current sensor measures the operating current of each series branch.

[0012] Preferably, it comprises:

[0013] The current sensor measures the current sharing coefficient at any time when the average current is greater than 10A, and sends a defect early warning signal when the measured current sharing coefficient at any time is greater than the factory setting value 0.5 and lasts for 1ms.

[0014] Preferably, characterized in that comprising:

[0015] The current sensor measures the current waveform of any branch in series at any moment when the average current is greater than 10A, and sends a defect warning signal when the current waveform is obviously mutated or abnormal.

[0016] Preferably, characterized in that comprising:

[0017] The current sensor measures the current waveform of any branch in series at any moment when the average current is greater than 10A, and sends a defect warning signal when the current waveform is obviously mutated or abnormal.

[0018] Preferably, characterized in that comprising:

[0019] The current sensor measures the current waveform of any branch in series at any moment when the average current is greater than 10A, and sends a defect warning signal when the current waveform is obviously mutated or abnormal.

[0020] Preferably, characterized in that comprising:

[0021] The fuse can reliably withstand normal impulse current with a duration of 50ms and an amplitude not greater than 400A;

[0022] The fuse can reliably withstand normal impulse current with a duration of 50ms and an amplitude not less than 2000A;

[0023] The fuse can reliably withstand normal impulse voltage with a duration of 50ms and an amplitude not greater than 150kV after action.

[0024] The technical scheme of the present application provides a kind of energy consumption type multi-column parallel lightning arrester, it is characterized in that, including: the multiple resistors of lightning arrester are in parallel, and lightning arrester includes the multiple resistors and generates multiple parallel combinations;Multiple parallel combinations in each parallel combination Multiple resistors are layered in series according to preset layer number, and lightning arrester includes multiple series branches, wherein the layer number is at least 3 layers;Each series branch of lightning arrester is connected with a fuse in series.The present application provides a kind of energy consumption type multi-column parallel lightning arrester, can reduce lightning arrester failure rate, or short-circuit failure component, to avoid the system outage caused by trip or lockout, improve power transmission system reliability. BRIEF DESCRIPTION OF DRAWINGS

[0025] The exemplary embodiments of the present application can be more completely understood by reference to the following drawings:

[0026] Figure 1 It is a structure diagram of a kind of energy consumption type multi-column parallel lightning arrester according to preferred embodiment of the present application. DETAILED DESCRIPTION

[0027] The exemplary embodiments of the present application will now be described with reference to the accompanying drawings, however, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, provided that the present application is thoroughly and completely disclosed, and to fully convey the scope of the present application to those skilled in the art. The terms used in the exemplary embodiments represented in the accompanying drawings are not limited to the present application. In the drawings, the same elements are denoted by the same reference numerals.

[0028] Unless otherwise defined, the terms (including technical terms) used herein have meanings that are commonly understood by one of ordinary skill in the art. Also, it is to be understood that the terms defined by commonly used dictionaries are to be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0029] Figure 1 A structure diagram of a multi-column parallel arrester according to a preferred embodiment of the present application.

[0030] As shown in Figure 1 The present application provides a multi-column parallel arrester, characterized in that it comprises:

[0031] The multiple resistance disks of the arrester are in parallel, and the arrester comprises multiple columns of parallel combinations of the multiple resistance disks;

[0032] Preferably, it comprises:

[0033] The multiple resistance disks in each parallel combination of the multiple parallel combinations are layered in series according to a preset number of layers, wherein the number of layers is at least 3 layers.

[0034] The arrester of the present application adopts a layered structure. The present application as a whole adopts a layered series-parallel structure, i.e., series after parallel; the number of layers m is greater than or equal to 3, which is determined by the reference voltage and the energy; and the number of columns n is appropriately increased, which is determined by the energy.

[0035] If there is a defective resistance disk, the internal short circuit of the element where the defective resistance disk is located will be caused at the time of failure, and the remaining (m-1) layers will bear the entire function of the arrester. The system does not need to be tripped / off, and can normally pass through overvoltage.

[0036] The energy and other technical parameters of the (m-1) layers*(n-1) columns of the present application are not less than the engineering requirements, i.e., the energy margin during normal operation is not less than m*n / (m-1)*(n-1).

[0037] There are many hot standby numbers, and the faulty elements can be removed after maintenance or monitoring.

[0038] The multiple resistance disks in each parallel combination of the multiple parallel combinations are layered in series according to a preset number of layers, and the arrester comprises multiple series branches;

[0039] Each series branch of the surge arrester is connected in series with a fuse.

[0040] Preferably comprising:

[0041] The operating current of each series branch is measured by a current sensor.

[0042] Preferably comprising:

[0043] The current sensor measures the current sharing coefficient at any time when the average current is greater than 10A, and sends a defect warning signal when the measured current sharing coefficient at any time is greater than the factory setting value of 0.5 and lasts for 1ms.

[0044] Preferably comprising:

[0045] The current sensor measures the current sharing coefficient at any time when the average current is greater than 10A, and sends a defect warning signal when the current sharing coefficient at the current peak is greater than the factory setting value of 0.5.

[0046] Preferably comprising:

[0047] The current sensor measures the current sharing coefficient at any time when the average current is greater than 10A, and sends a defect warning signal when the current sharing coefficient at the current peak is greater than the factory setting value of 0.5.

[0048] Preferably comprising:

[0049] The current sensor measures the current waveform of any series branch operating current, and sends a defect warning signal when there is a significant mutation or abnormality in the current waveform.

[0050] The present application also provides a multi-column parallel surge arrester operating current detection defect warning criterion.

[0051] The present application monitors the operating current of energy-consuming multi-column parallel surge arrester:

[0052] The operating current of each element (series branch) should be measured to improve monitoring sensitivity; multiple parallel elements cannot share a current sensor (according to traditional methods).

[0053] The consistency of the measurement results is not greater than 5%.

[0054] The average current greater than 10A and the current sharing coefficient at any time should be given, and a defect warning signal is sent when the current sharing coefficient at any time is greater than the factory value of 0.5 and lasts for 1ms.

[0055] The average current greater than 10A and the current sharing coefficient at any time should be given, and a defect warning signal is sent when the current sharing coefficient at the current peak is greater than the factory value of 0.5.

[0056] When the current reduction phase current sharing coefficient is greater than 5, a suspected defect early warning signal is sent out.

[0057] When the column current waveform obviously mutates / abnormal, a defect early warning signal is sent out.

[0058] Preferably, comprising:

[0059] After each action of the lightning arrester, the insulation resistance of each layer of the lightning arrester is measured when not charged for the first time, and when the insulation resistance of one layer of the series branch is less than 2500MΩ, it is determined that the lightning arrester of the layer where the series branch is located has a faulty element.

[0060] Preferably, comprising:

[0061] The DC reference voltage of each layer of the series branch of the lightning arrester is measured, and when the DC reference voltage of one layer of the series branch decreases by more than 5%, it is determined that the lightning arrester of the layer where the series branch is located has a faulty element.

[0062] The present application provides a power outage maintenance method:

[0063] After each action of the lightning arrester, the appearance of the lightning arrester is observed regularly to see if there is any abnormality.

[0064] After each action of the lightning arrester, the insulation resistance of each layer of the lightning arrester is measured when not charged for the first time, and when the insulation resistance is less than 2500MΩ, it is determined that the lightning arrester of the layer where the series branch is located has a faulty element.

[0065] The DC reference voltage of each layer of the series branch of the lightning arrester is measured, and when the DC reference voltage of one layer of the series branch decreases by more than 5%, it is determined that the lightning arrester of the layer where the series branch is located has a faulty element.

[0066] Preferably, comprising:

[0067] The fuse can reliably withstand normal impulse current with a duration of 50ms and an amplitude of not more than 400A;

[0068] The fuse can reliably melt under normal impulse current with a duration of 50ms and an amplitude of not less than 2000A.

[0069] After the action of the fuse, it can reliably withstand normal impulse voltage with a duration of 50ms and an amplitude of not more than 150kV.

[0070] The present application provides backup protection through the fuse, and each lightning arrester element of the present application is connected in series with a fuse.

[0071] The fuse should be able to reliably withstand normal impulse current with a duration of 50ms and an amplitude of not more than 400A.

[0072] The fuse should be able to reliably melt under normal impulse current with a duration of 50ms and an amplitude of not less than 2000A.

[0073] After the fuse operates, it should be able to reliably withstand normal impulse voltage with a duration of 50 ms and an amplitude of no more than 150 kV.

[0074] The application provides a power consumption type multi-column parallel lightning arrester and an operating current monitoring system thereof, and can solve the problems of high failure rate of the power consumption type multi-column parallel lightning arrester, tripping or locking caused by the failure, and system shutdown.

[0075] Those skilled in the art will understand that embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present application can be implemented in various computer languages, such as object-oriented programming languages Java and interpreted scripting language JavaScript.

[0076] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that implements the functions specified in the flowcharts and / or block diagrams.

[0077] These computer program instructions can also be stored in a computer-readable memory that can direct the computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including instruction apparatus, which implements the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more flows and / or blocks Figure 1 an apparatus that implements the functions specified in the flowcharts and / or block diagrams.

[0078] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable data processing apparatus to produce a computer-implemented process, so that the instructions executed on the computer or other programmable data processing apparatus provide a process for implementing the functions specified in the flowcharts and / or block diagrams.Figure 1 one or more processes and / or functions specified in one or more blocks. Figure 1 the steps of a function, either singularly or in combination.

[0079] While the preferred embodiments of the application have been described, additional variations and modifications can be made to the preferred embodiments by those skilled in the art once they have the benefit of the present disclosure. Therefore, it is to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit and scope of the application. In compliance with the statute, the application has been described in language more or less specific to structural

[0080] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

[0081] The application has been described through reference to several implementations. However, the person of ordinary skill in the art will understand that other implementations are equally possible and that the application is intended to encompass all such implementations and their equivalents.

[0082] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a" or "an" means "at least one" unless otherwise clearly indicated by the context of the disclosure. Any method steps, as recited in any claim, are not to be interpreted as being performed in any particular order unless the claim recites "before" or "after" another specific step or intervening steps are clearly identified.

Claims

1. A power dissipation type multi-column parallel lightning arrester, characterized by, The multiple resistance disks of the lightning arrester are in parallel, and the lightning arrester comprises multiple parallel combinations of multiple resistance disks; The multiple resistance disks in each parallel combination of the multiple parallel combinations are layered and connected in series according to a preset number of layers, and the lightning arrester comprises multiple series branches, wherein the number of layers is at least three layers; Each series branch of the lightning arrester is connected in series with a fuse. The current sensor measures the operating current of each series branch.

2. The energy dissipation type multi-column parallel lightning arrester according to claim 1, wherein The current sensor measures the current sharing coefficient at any moment when the average current is greater than 10A, and sends a defect warning signal when the measured current sharing coefficient at any moment is greater than the factory setting value of 0.5 and lasts for 1ms. The current sensor measures the current sharing coefficient at any moment when the average current is greater than 10A, and sends a defect warning signal when the current sharing coefficient at the current peak is greater than the factory setting value of 0.

5.

3. The energy dissipation type multi-column parallel lightning arrester according to claim 2, wherein The current sensor measures the current sharing coefficient at any moment when the average current is greater than 10A, and sends a defect warning signal when the current sharing coefficient is greater than 5 in the current decline stage. The current sensor measures the current waveform of any operating current of each series branch, and sends a defect warning signal when the current waveform has a significant mutation or anomaly.

4. The energy dissipation type multi-column parallel lightning arrester according to claim 2, wherein The current sensor measures the current waveform of any operating current of each series branch, and sends a defect warning signal when the current waveform has a significant mutation or anomaly. The fuse can reliably withstand normal impulse current with a duration of 50ms and an amplitude of not more than 400A; 5. The energy dissipation type multi-column parallel lightning arrester according to claim 2, wherein The fuse can reliably melt under normal impulse current with a duration of 50ms and an amplitude of not less than 2000A; After the fuse operates, it can reliably withstand normal impulse voltage with a duration of 50ms and an amplitude of not more than 150kV.

6. The energy dissipation type multi-column parallel lightning arrester according to claim 2, wherein ​ ​ 7. The energy dissipation type multi-column parallel lightning arrester according to claim 1, wherein ​ ​ ​ ​

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