CN210572540U - Multi-column parallel lightning arrester test device - Google Patents
Multi-column parallel lightning arrester test device Download PDFInfo
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- CN210572540U CN210572540U CN201921165196.4U CN201921165196U CN210572540U CN 210572540 U CN210572540 U CN 210572540U CN 201921165196 U CN201921165196 U CN 201921165196U CN 210572540 U CN210572540 U CN 210572540U
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Abstract
The utility model relates to a many parallelly connected arrester test device of post, including parallelly connected heavy current in proper order taking place branch road, mechanical switch branch road, artifical zero passage branch road of high frequency, simulation trouble branch road and many posts arrester branch road that connects in parallel. The high-current generation branch comprises a mechanical switch K0, an inductor L0 and a capacitor C0 which are sequentially connected in series; the mechanical switch branch comprises a mechanical switch K1; the high-frequency artificial zero-crossing branch comprises an inductor L1, a capacitor C1 and a spark GAP GAP1 which are sequentially connected in series; the analog fault branch comprises a fuse FU0 and a zinc oxide nonlinear resistor MOV0 which are connected in series, and a spark GAP GAP2 connected in parallel across the zinc oxide nonlinear resistor MOV 0; the multi-column parallel lightning arrester branch comprises a multi-column parallel lightning arrester. The test device can carry out 1:1 true type test on the multi-column parallel arrester according to the working condition of the multi-column parallel arrester on the using site.
Description
Technical Field
The utility model relates to an experimental technical field of arrester, concretely relates to many parallelly connected arrester test device of post.
Background
With the updating and development of the technology, the direct-current transmission voltage grade in China is gradually improved, and currently, a plurality of +/-1100 kV extra-high voltage direct-current projects are started to be constructed and put into operation successively. The higher the voltage grade is, the higher the transmission power is, and the higher the energy needs to be absorbed by arresters such as a neutral bus arrester, a metal transfer switch arrester and the like which adopt a multi-column parallel structure. In order to ensure the insulation fit with the system and keep enough low residual voltage, the lightning arrester group needs to adopt more parallel branches for shunting. If the characteristics of a certain column arrester in the whole group are reduced due to insulation damp or valve plate deterioration, the shunt of the column is increased rapidly under the impact of large energy, and the accumulated energy exceeds the self heat capacity in the pressure limiting and energy absorbing processes, the column is broken down and short-circuited and exploded, and the whole group of arresters fails. Forced shutdown of the system not only affects the operation of the system, but also causes a great amount of economic loss to the power grid, the power plant and the user.
At present, the research on the lightning arrester at home and abroad is mainly to reasonably optimize the parameter configuration of the lightning arrester by researching the insulation matching of the lightning arrester and a system; the overall performance of the lightning arrester is improved by researching the material performance of the zinc oxide resistance card and the like; the potential distribution and the current non-uniform coefficient of the multi-column parallel arrester and a resistor disc matching method are researched to improve the reliability of the arrester. But lightning arrester failure of the direct current converter station still often occurs.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a many posts arrester test device that connects in parallel, this test device can use the site operating mode according to many posts arrester, carries out 1:1 true type test to many posts arrester that connects in parallel.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a multi-column parallel lightning arrester test device comprises a large-current generation branch, a mechanical switch branch, a high-frequency artificial zero-crossing branch, a simulated fault branch and a multi-column parallel lightning arrester branch which are sequentially connected in parallel.
The high-current generation branch comprises a mechanical switch K0, an inductor L0 and a capacitor C0 which are sequentially connected in series; the mechanical switch branch comprises a mechanical switch K1; the high-frequency artificial zero-crossing branch comprises an inductor L1, a capacitor C1 and a first conducting element which are sequentially connected in series; the analog fault branch comprises a fuse FU0 and a zinc oxide nonlinear resistor MOV0 which are connected in series, and a second conducting element connected in parallel to two ends of the zinc oxide nonlinear resistor MOV 0; the multi-column parallel lightning arrester branch comprises a multi-column parallel lightning arrester.
Further, the multi-column parallel arrester comprises a plurality of columns of arresters connected in parallel; the arrester comprises a fuse and a zinc oxide nonlinear resistor connected in series.
Further, the first conduction element adopts a spark GAP GAP1, and the second conduction element adopts a spark GAP GAP 2.
Further, the first conducting element and the second conducting element are silicon controlled or insulated gate bipolar transistors.
According to the above technical scheme, the utility model discloses when the arrester structure is parallelly connected for a large amount of branch roads, series fuse in each post return circuit, when energy overabsorption takes place the thermal collapse when certain post appears, the electric current concentrates and leads to this post fuse fusing to make this post withdraw from the operation, the steady operation of surplus arrester normal work assurance system. The utility model can carry out 1:1 true type test on the multi-column parallel arrester according to the working condition of the multi-column parallel arrester on the using site; through simulating the breakdown fault of the single-column arrester, when verifying that the breakdown fault of the single-column arrester occurs when the multi-column parallel arrester acts on a load, the fault can be automatically and quickly isolated, the stable operation of the system can still be ensured by the residual arrester groups, and the problem of failure of the whole group caused by the fault of the single-column arrester can be solved. The utility model has the advantages of the controllability is strong, easy operation.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
the multi-column parallel lightning arrester test device shown in fig. 1 comprises a large-current generation branch, a mechanical switch branch, a high-frequency artificial zero-crossing branch, a simulation fault branch and a multi-column parallel lightning arrester branch which are sequentially connected in parallel.
The high-current generation branch comprises a mechanical switch K0, an inductor L0 and a capacitor C0 which are sequentially connected in series; the mechanical switch branch comprises a mechanical switch K1; the high-frequency artificial zero-crossing branch comprises an inductor L1, a capacitor C1 and a first conducting element which are sequentially connected in series; the analog fault branch comprises a fuse FU0 and a zinc oxide nonlinear resistor MOV0 which are connected in series, and a second conducting element connected in parallel to two ends of the zinc oxide nonlinear resistor MOV 0; the multi-column parallel lightning arrester branch comprises a multi-column parallel lightning arrester.
Further, the multi-column parallel arrester comprises a plurality of columns of arresters connected in parallel; the arrester comprises a fuse and a zinc oxide nonlinear resistor connected in series.
Further, the first conduction element adopts a spark GAP GAP1, and the second conduction element adopts a spark GAP GAP 2.
Further, the first conducting element and the second conducting element are silicon controlled or insulated gate bipolar transistors.
Further, the multi-column parallel lightning arrester comprises a plurality of groups of lightning arresters connected in parallel; the arrester comprises a fuse and a zinc oxide nonlinear resistor connected in series. The multi-column parallel lightning arrester branch is used for limiting overvoltage generated by the high-frequency artificial zero-crossing branch and absorbing energy stored in an inductor L0 in the high-current generation branch.
Specifically, the outlet end of the mechanical switch K0 is connected with the inlet end of the inductor L0, the outlet end of the mechanical switch K1 is connected with the outlet end of the inductor L0, the outlet end of the inductor L0 is connected with the anode of the capacitor C0, and the cathode of the capacitor C0 is connected with the inlet end of the mechanical switch K1; the inlet wire end of the spark GAP GAP1 is connected with the inlet wire end of the mechanical switch K1, the outlet wire end is connected with the anode of the capacitor C1, the cathode of the capacitor C1 is connected with the inlet wire end of the inductor L1, and the outlet wire end of the inductor L1 is connected with the outlet wire end of the mechanical switch K1; the incoming line of the fuse FU0 is connected with the outgoing line end of the inductor L1, the outgoing line is connected with the incoming line end of the zinc oxide nonlinear resistor MOV0, the outgoing line of the zinc oxide nonlinear resistor MOV0 is connected with the incoming line end of the spark GAP GAP2, the outgoing line end of the spark GAP GAP2 is connected with a node between the fuse FU0 and the zinc oxide nonlinear resistor MOV0, and the incoming line of the spark GAP GAP2 is connected with the incoming line end of the spark GAP GAP 1. The incoming line end of fuse FU0 is also connected to the incoming line end of the fuse in each surge arrester and the outgoing line end of the zinc oxide nonlinear resistor MOV0 is also connected to the outgoing line end of the zinc oxide nonlinear resistor in each surge arrester. In each lightning arrester, the outlet wire of the fuse wire is terminated with the inlet wire end of the zinc oxide nonlinear resistor.
The high-current generation branch circuit generates current required by the test through oscillation of the capacitor C0 and the inductor L0. And the mechanical switch branch is used for switching off the test current. The high-frequency artificial zero-crossing branch is used for extinguishing arc of the mechanical switch K1 in advance, and rapid transfer of test current is achieved. The fuse FU0 and the zinc oxide nonlinear resistor MOV0 in the simulated fault branch are single-column arresters with the same specification randomly selected from multi-column parallel-connected arresters. The spark GAP GAP2 is used for quickly shorting the zinc oxide nonlinear resistor MOV0 during the test and simulating the breakdown fault of the single-column lightning arrester.
The test method of the multi-column parallel lightning arrester test device comprises the following steps:
(1) initial state of the test: the mechanical switch K0 is in an opening state, the mechanical switch K1 is in a closing state, and the spark GAP GAP1 and the spark GAP GAP2 are both in an opening state; capacitor C1 and capacitor C2 are both charged to the desired voltage value and held.
(2) The test process comprises the following steps: closing a mechanical switch K0, and oscillating a capacitor C0 and an inductor L0 in the high-current generation branch circuit to generate current required by the test; after the time t is delayed, the mechanical switch K1 is controlled to be switched off, so that the test current reaches a peak value after the mechanical switch K1 is switched off, a spark GAP GAP1 is triggered to be conducted, an inductor L1 and a capacitor C1 in the high-frequency artificial zero-crossing branch circuit vibrate to generate reverse high-frequency discharge current, the mechanical switch K1 is enabled to extinguish arc in advance, and the test current is quickly transferred to the high-frequency artificial zero-crossing branch circuit; the energy stored by the inductor L0 in the large-current generation branch charges the capacitor C1 until the voltage at two ends of the capacitor C1 reaches the working voltage of the multi-column parallel arrester branch, when the multi-column parallel arrester works is detected, a spark GAP GAP2 is triggered to be conducted, a zinc oxide nonlinear resistor MOV0 in a fault simulation branch is quickly short-circuited, the breakdown fault of the single-column simulation arrester occurs, at the moment, the current flows through a fuse FU0, the fuse FU0 is blown at the us level to quickly isolate the fault, the energy stored by the inductor L0 in the large-current generation branch continues to charge the capacitor C1 until the multi-column parallel arrester branch is conducted again, the energy is absorbed, and the voltage at two ends of the capacitor C1 is limited.
The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.
Claims (4)
1. The utility model provides a many parallelly connected arrester test device which characterized in that: the system comprises a large-current generation branch, a mechanical switch branch, a high-frequency artificial zero-crossing branch, a fault simulation branch and a multi-column parallel lightning arrester branch which are sequentially connected in parallel;
the high-current generation branch comprises a mechanical switch K0, an inductor L0 and a capacitor C0 which are sequentially connected in series; the mechanical switch branch comprises a mechanical switch K1; the high-frequency artificial zero-crossing branch comprises an inductor L1, a capacitor C1 and a first conducting element which are sequentially connected in series; the analog fault branch comprises a fuse FU0 and a zinc oxide nonlinear resistor MOV0 which are connected in series, and a second conducting element connected in parallel to two ends of the zinc oxide nonlinear resistor MOV 0; the multi-column parallel lightning arrester branch comprises a multi-column parallel lightning arrester.
2. The multi-column parallel arrester testing device according to claim 1, characterized in that: the multi-column parallel lightning arrester comprises a plurality of columns of lightning arresters connected in parallel; the arrester comprises a fuse and a zinc oxide nonlinear resistor connected in series.
3. The multi-column parallel arrester testing device according to claim 1, characterized in that: the first conducting element adopts a spark GAP GAP1, and the second conducting element adopts a spark GAP GAP 2.
4. The multi-column parallel arrester testing device according to claim 1, characterized in that: the first conducting element and the second conducting element adopt silicon controlled rectifiers or insulated gate bipolar transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921165196.4U CN210572540U (en) | 2019-07-24 | 2019-07-24 | Multi-column parallel lightning arrester test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921165196.4U CN210572540U (en) | 2019-07-24 | 2019-07-24 | Multi-column parallel lightning arrester test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210572540U true CN210572540U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921165196.4U Active CN210572540U (en) | 2019-07-24 | 2019-07-24 | Multi-column parallel lightning arrester test device |
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| CN (1) | CN210572540U (en) |
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2019
- 2019-07-24 CN CN201921165196.4U patent/CN210572540U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221017 Address after: 230601 2604, Office Building D, Plot E3, Central City, No. 12227, Fanhua Avenue, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: Anhui Kaili Intelligent Technology Co.,Ltd. Address before: 230088 No. 26 Acacia Road, hi tech Zone, Anhui, Hefei Patentee before: Wang Yan |
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| TR01 | Transfer of patent right |