CN103138237B - Method and device for protecting gap action of transformer neutral point - Google Patents
Method and device for protecting gap action of transformer neutral point Download PDFInfo
- Publication number
- CN103138237B CN103138237B CN201310059960.0A CN201310059960A CN103138237B CN 103138237 B CN103138237 B CN 103138237B CN 201310059960 A CN201310059960 A CN 201310059960A CN 103138237 B CN103138237 B CN 103138237B
- Authority
- CN
- China
- Prior art keywords
- neutral point
- transformer
- armature
- gap
- lightning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000007935 neutral effect Effects 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000015556 catabolic process Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000004880 explosion Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
本发明公开了一种用于变压器中性点保护间隙动作的装置，包括：避雷装置，其至少包括避雷装置底座和设置在所述避雷装置底座上的避雷装置主体；与所述避雷装置主体相连接的变压器中性点保护间隙；设置在所述变压器中性点保护间隙中的可弹出的衔铁；装设在所述衔铁上的控制装置，所述控制装置用以根据所述避雷装置上流过电流的大小，控制弹出所述衔铁并击穿导通所述变压器中性点保护间隙。本发明还公开了一种用于变压器中性点保护间隙动作的方法。实施本发明的用于变压器中性点保护间隙动作的方法及装置，能够降低避雷装置由于通电电流时间过长而发生爆炸的几率，保证电网可靠运营。
The invention discloses a device for protecting the gap action of the neutral point of a transformer, comprising: a lightning protection device, which at least includes a lightning protection device base and a lightning protection device main body arranged on the lightning protection device base; The neutral point protection gap of the connected transformer; the pop-up armature arranged in the neutral point protection gap of the transformer; the control device installed on the armature, and the control device is used to flow through the lightning protection device according to The size of the current is controlled to eject the armature and break through the neutral point protection gap of the transformer. The invention also discloses a method for gap action of transformer neutral point protection. The implementation of the method and device for transformer neutral point protection gap action of the present invention can reduce the probability of explosion of the lightning protection device due to too long energized current time, and ensure reliable operation of the power grid.
Description
技术领域technical field
本发明涉及变压器领域，尤其涉及一种用于变压器中性点保护间隙动作的方法及装置。The invention relates to the field of transformers, in particular to a method and device for neutral point protection gap operation of transformers.
背景技术Background technique
目前，110kV～500kV系统通常采用有效接地方式，为了限制单相接地短路电流，防止通讯干扰和继电保护的整定配置等要求，实际运行的110kV以上电网中一般采用一台变压器中性点直接接地，其余变压器的中性点经避雷器或保护间隙接地，或经避雷器与保护间隙并联接地的方式。避雷器和并联间隙的保护动作分工是：工频过电压、操作过电压由间隙承担，雷电过电压、暂态过电压由避雷器承担，同时又用保护间隙来限制避雷器上可能出现的过高幅值的工频过电压和过高的残压。然而，很多时候变压器中性点避雷器与并联的间隙并不能像预想的那样动作，这将影响电网运行的可靠性。At present, the 110kV ~ 500kV system usually adopts an effective grounding method. In order to limit the single-phase grounding short-circuit current, prevent communication interference and relay protection setting configuration and other requirements, the actual operating power grid above 110kV generally uses a transformer neutral point to be directly grounded. , the neutral point of the rest of the transformers is grounded through the arrester or the protective gap, or connected to the ground through the arrester and the protective gap in parallel. The division of protective actions between the arrester and the parallel gap is: power frequency overvoltage and operating overvoltage are borne by the gap, lightning overvoltage and transient overvoltage are borne by the arrester, and at the same time, the protection gap is used to limit the excessively high amplitude that may occur on the arrester power frequency overvoltage and excessive residual voltage. However, in many cases, the gap between the transformer neutral point arrester and the parallel connection cannot act as expected, which will affect the reliability of the power grid operation.
发明内容Contents of the invention
本发明所要解决的技术问题在于，提供一种用于变压器中性点保护间隙动作的方法及装置，能够降低避雷装置由于通电电流时间过长而发生爆炸的几率，保证电网可靠运营。The technical problem to be solved by the present invention is to provide a method and device for neutral point protection gap operation of transformers, which can reduce the probability of explosion of the lightning protection device due to too long energized current, and ensure reliable operation of the power grid.
为了解决上述技术问题，本发明实施例提供了一种用于变压器中性点保护间隙动作的装置，包括：避雷装置，其至少包括避雷装置底座和设置在避雷装置底座上的避雷装置主体；与避雷装置主体相连接的变压器中性点保护间隙；设置在变压器中性点保护间隙中的可弹出的衔铁；装设在衔铁上的控制装置，控制装置用以根据避雷装置上流过电流的大小，控制弹出衔铁并击穿导通变压器中性点保护间隙。In order to solve the above-mentioned technical problems, an embodiment of the present invention provides a device for neutral point protection gap operation of a transformer, including: a lightning protection device, which at least includes a lightning protection device base and a lightning protection device body arranged on the lightning protection device base; and The neutral point protection gap of the transformer connected to the main body of the lightning protection device; the pop-up armature set in the neutral point protection gap of the transformer; the control device installed on the armature, the control device is used according to the size of the current flowing through the lightning protection device, Control the pop-up armature and breakdown conduction transformer neutral protection gap.
优选的，控制装置包括缠绕在衔铁上的线圈，线圈设置在变压器中性点保护间隙中。Preferably, the control device includes a coil wound on the armature, and the coil is arranged in the neutral point protection gap of the transformer.
优选的，线圈的一端连接在避雷装置底座上，另一端接地，线圈用以根据接收到的避雷装置底座发出的控制信号，控制弹出衔铁。Preferably, one end of the coil is connected to the base of the lightning arrester, and the other end is grounded, and the coil is used to control the ejection of the armature according to the received control signal from the base of the lightning arrester.
优选的，用于变压器中性点保护间隙动作的装置还包括：用以在当衔铁弹出后对其进行复位的复位装置，复位装置的一端连接到衔铁上，另一端紧固固定。Preferably, the device for the transformer neutral point protection gap action further includes: a reset device for resetting the armature after it pops out, one end of the reset device is connected to the armature, and the other end is fastened and fixed.
为解决上述技术问题，本发明还公开了一种用于上述用于变压器中性点保护间隙动作装置的变压器中性点保护间隙动作的方法，包括以下步骤：根据避雷装置上流过电流的大小，控制弹出设置在变压器中性点保护间隙中的衔铁；击穿导通变压器中性点保护间隙，其中，变压器中性点保护间隙与一避雷装置具有的避雷装置主体相连接。In order to solve the above-mentioned technical problems, the present invention also discloses a method for operating the neutral point protection gap of a transformer used in the neutral point protection gap operating device of a transformer, which includes the following steps: according to the magnitude of the current flowing through the lightning protection device, Controlling pop-up of the armature set in the neutral point protection gap of the transformer; breakdown and conducting the neutral point protection gap of the transformer, wherein the neutral point protection gap of the transformer is connected with the main body of the lightning protection device of a lightning protection device.
优选的，根据避雷装置上流过电流的大小，控制弹出设置在变压器中性点保护间隙中的衔铁的步骤包括以下步骤：当避雷装置上的电流达到阈值时，避雷装置具有的避雷装置底座向设置在变压器中性点保护间隙中的线圈发送控制信号，装设在衔铁上的线圈根据接收到的控制信号，控制弹出衔铁。Preferably, according to the size of the current flowing through the lightning protection device, the step of controlling the ejection of the armature disposed in the neutral point protection gap of the transformer includes the following steps: when the current on the lightning protection device reaches a threshold value, the base of the lightning protection device provided by the lightning protection device is set to The coil in the neutral point protection gap of the transformer sends a control signal, and the coil installed on the armature controls the ejection of the armature according to the received control signal.
优选的，击穿导通变压器中性点保护间隙的步骤包括以下步骤：变压器中性点保护间隙持续燃弧至避雷装置内部的过电压消失，衔铁复位。Preferably, the step of breaking through the neutral point protection gap of the transformer includes the following steps: the neutral point protection gap of the transformer continues to burn until the overvoltage inside the lightning arrester disappears, and the armature resets.
优选的，避雷装置上因雷电发生过电压和避雷装置底座向线圈发送控制信号之间发生机械延时，避雷装置内部的过电压由避雷装置主体泄放，衔铁固定不动。Preferably, a mechanical delay occurs between the overvoltage on the lightning arrester due to lightning and the control signal sent from the base of the lightning arrester to the coil, the overvoltage inside the lightning arrester is released by the main body of the lightning arrester, and the armature is fixed.
优选的，机械延时在0.01秒至1秒的范围内可调。Preferably, the mechanical delay is adjustable within the range of 0.01 second to 1 second.
实施本发明实施例用于变压器中性点保护间隙动作的方法及装置，具有如下有益效果：通过变压器中性点连接的避雷装置上流过的电流的大小决定衔铁的动作，使得中性点保护间隙在变压器工频过电压、操作过电压等内部过电压，以及避雷装置上可能出现的过高幅值的工频过电压和过高残压的情况下可靠动作，而发生雷电过电压时避雷装置可靠动作，从而保证避雷装置不会由于通电电流时间过长而发生爆炸，进而可以保证电网运营的可靠性。Implementing the method and device for the operation of the transformer neutral point protection gap in the embodiment of the present invention has the following beneficial effects: the magnitude of the current flowing through the lightning protection device connected to the transformer neutral point determines the action of the armature, so that the neutral point protection gap Reliable operation in the case of internal overvoltage such as transformer power frequency overvoltage and operating overvoltage, as well as excessive power frequency overvoltage and excessive residual voltage that may appear on the lightning protection device, and the lightning protection device Reliable action, so as to ensure that the lightning protection device will not explode due to too long energized current, thereby ensuring the reliability of power grid operation.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1为本发明实施例用于变压器中性点保护间隙动作的装置的结构示意图。Fig. 1 is a schematic structural diagram of a device for neutral point protection gap operation of a transformer according to an embodiment of the present invention.
具体实施方式Detailed ways
下面结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.
参见图1，为本发明用于变压器中性点保护间隙动作的装置的实施例一。Referring to Fig. 1, it is the first embodiment of the device for transformer neutral point protection gap operation according to the present invention.
本实施例中的用于变压器中性点保护间隙动作的装置包括：The device used for transformer neutral point protection gap action in this embodiment includes:
避雷装置1，其包括避雷装置底座11和设置在避雷装置底座11上的避雷装置主体12，避雷装置底座11连接在基座13上；The lightning protection device 1 includes a lightning protection device base 11 and a lightning protection device main body 12 arranged on the lightning protection device base 11, and the lightning protection device base 11 is connected to the base 13;
与避雷装置主体12相连接的变压器中性点保护间隙2；The transformer neutral point protection gap 2 connected with the main body 12 of the lightning protection device;
设置在变压器中性点保护间隙2中的可弹出的衔铁3；A pop-up armature 3 arranged in the neutral point protection gap 2 of the transformer;
装设在衔铁3上的控制装置4，控制装置4用以根据避雷装置1上流过电流的大小，控制弹出衔铁3并击穿导通变压器中性点保护间隙2。其中：控制装置4至少包括设置在变压器中性点保护间隙2中的线圈41和复位装置42。The control device 4 installed on the armature 3 is used to control the ejection of the armature 3 and break down the neutral point protection gap 2 of the conduction transformer according to the magnitude of the current flowing through the lightning protection device 1 . Wherein: the control device 4 at least includes a coil 41 and a reset device 42 arranged in the neutral point protection gap 2 of the transformer.
线圈41缠绕在衔铁3上并放置在变压器中性点保护间隙2中，线圈41的作用是在通电的状态下产生磁场，进而施加作用力在衔铁3上使其弹出，能够在变压器中性点保护间隙2中动作。The coil 41 is wound on the armature 3 and placed in the neutral point protection gap 2 of the transformer. The function of the coil 41 is to generate a magnetic field in the state of being energized, and then apply a force on the armature 3 to make it pop up, so that the neutral point of the transformer can be Action in protection gap 2.
具体地，线圈41的一端41a连接在避雷装置底座2上，另一端41b接地，线圈41能够接收避雷装置底座11发出的控制信号(尤指变压器工频过电压、操作过电压的控制信号)，控制弹出衔铁3，进而引发中性点保护间隙击穿导通。Specifically, one end 41a of the coil 41 is connected to the lightning protection device base 2, and the other end 41b is grounded, and the coil 41 can receive the control signal (especially the control signal of the transformer power frequency overvoltage and the operation overvoltage) sent by the lightning protection device base 11, The armature 3 is ejected under control, thereby causing breakdown and conduction of the neutral point protection gap.
进一步的，用于变压器中性点保护间隙动作的装置还包括：用以在当衔铁3弹出后对其进行复位的复位装置4。本实施例中，复位装置4设为弹簧，其一端连接到衔铁3上，另一端紧固在一固定点A。Further, the device for the transformer neutral point protection gap action also includes: a reset device 4 for resetting the armature 3 after it pops out. In this embodiment, the reset device 4 is a spring, one end of which is connected to the armature 3 and the other end is fastened to a fixed point A.
复位装置4的作用是：在因变压器工频过电压、操作过电压引起上述衔铁3动作，变压器中性点保护间隙2击穿后，复位装置4能够使衔铁3复位。The function of the reset device 4 is: after the above-mentioned armature 3 moves due to transformer power frequency overvoltage and operation overvoltage, and the transformer neutral point protection gap 2 breaks down, the reset device 4 can reset the armature 3 .
具体实施时，衔铁3的动作可由变压器中性点连接的避雷装置1上的电流大小进行控制。例如：当避雷装置1的避雷装置主体12上的电流达到某一阈值时(例如几安培)，其中：该引起避雷装置1上的电流达到某一阈值的情况包括变压器工频过电压、操作过电压等内部过电压，也包括避雷装置1上可能出现的过高幅值的工频过电压和过高的残压等情况。During specific implementation, the action of the armature 3 can be controlled by the magnitude of the current on the lightning arrester 1 connected to the neutral point of the transformer. For example: when the current on the lightning protection device main body 12 of the lightning protection device 1 reaches a certain threshold (such as several amperes), wherein: the situation that causes the current on the lightning protection device 1 to reach a certain threshold includes transformer power frequency overvoltage, over-operation Voltage and other internal overvoltages also include the excessively high-amplitude power frequency overvoltage and excessively high residual voltage that may occur on the lightning protection device 1 .
也就是说，当避雷装置上流过的电流大小达到预定值时，避雷装置1启动，控制信号就会由避雷装置底座2引出，并传递给与其相连的线圈41；线圈41在通电的状态下产生磁场，进而施加作用力在衔铁3上使其弹出，进而引发中性点保护间隙击穿导通，保护避雷装置和其他设备。当中性点保护间隙击穿后，中性点保护间隙2将持续燃弧至内部电压消失，此时电流变小，复位装置4使衔铁3复位。That is to say, when the magnitude of the current flowing on the lightning protection device reaches a predetermined value, the lightning protection device 1 starts, and the control signal will be drawn from the base 2 of the lightning protection device and transmitted to the coil 41 connected to it; The magnetic field, and then exert force on the armature 3 to make it pop up, and then cause the breakdown and conduction of the neutral point protection gap, and protect the lightning protection device and other equipment. After the neutral point protection gap breaks down, the neutral point protection gap 2 will continue to arc until the internal voltage disappears, at this time the current becomes smaller, and the reset device 4 resets the armature 3 .
可以理解的是，通过选取不同保护间隙2的长度或改变线圈41的大小和圈数可使衔铁3动作的同时中性点保护间隙2能够被击穿导通；此外，无论发生内部过电压或是雷电过电压，由于控制信号由避雷装置底座2引出，避雷装置均会首先启动。It can be understood that by selecting different lengths of the protection gap 2 or changing the size and number of turns of the coil 41, the neutral point protection gap 2 can be broken down and turned on while the armature 3 is in motion; Lightning overvoltage, because the control signal is drawn from the base 2 of the lightning protection device, the lightning protection device will be activated first.
进一步，当变压器中性点发生雷电过电压时，控制装置将不会控制弹出衔铁3，这是因为避雷装置主体1上发生过电压和控制装置4间接受控制信号间存在机械延时，而发生雷电过电压时，由于前述机械延时，当控制信号达到衔铁3时，雷电波已经由避雷装置主体12泄放，故衔铁3将不会发生移动。Further, when a lightning overvoltage occurs at the neutral point of the transformer, the control device will not control the ejection of the armature 3, because there is a mechanical delay between the occurrence of the overvoltage on the main body of the lightning protection device 1 and the indirect reception of the control signal by the control device 4. When the lightning overvoltage occurs, due to the aforementioned mechanical delay, when the control signal reaches the armature 3, the lightning wave has already been discharged by the main body 12 of the lightning protection device, so the armature 3 will not move.
通过上述变压器中性点连接的避雷装置1上流过的电流的大小决定衔铁3的动作，使得中性点保护间隙2在变压器工频过电压、操作过电压等内部过电压，和避雷装置1上可能出现的过高幅值的工频过电压和过高残压的情况下可靠动作，而发生雷电过电压时保持不动，从而保证避雷装置不会由于通电电流时间过长而发生爆炸。The magnitude of the current flowing through the lightning arrester 1 connected to the neutral point of the above-mentioned transformer determines the action of the armature 3, so that the neutral point protection gap 2 is protected against internal overvoltages such as transformer power frequency overvoltage and operating overvoltage, and on the lightning arrester 1 Reliable action in the case of excessively high amplitude power frequency overvoltage and excessive residual voltage, and keep still when lightning overvoltage occurs, so as to ensure that the lightning protection device will not explode due to excessive current flow.
本发明还公开了一种用于变压器中性点保护间隙动作的方法，包括以下步骤：根据避雷装置上流过电流的大小，控制弹出设置在变压器中性点保护间隙中的衔铁；击穿导通变压器中性点保护间隙，其中，变压器中性点保护间隙与一避雷装置具有的避雷装置主体相连接。The invention also discloses a method for operating the neutral point protection gap of a transformer, which includes the following steps: according to the magnitude of the current flowing through the lightning protection device, controlling the ejection of the armature set in the neutral point protection gap of the transformer; breakdown and conduction The neutral point protection gap of the transformer, wherein the neutral point protection gap of the transformer is connected with the main body of the lightning protection device of a lightning protection device.
进一步的，根据避雷装置上流过电流的大小，控制弹出设置在变压器中性点保护间隙中的衔铁的步骤包括以下步骤：当避雷装置上的电流达到阈值时，避雷装置具有的避雷装置底座向设置在变压器中性点保护间隙中的线圈发送控制信号，装设在衔铁上的线圈根据接收到的控制信号，控制弹出衔铁。Further, according to the size of the current flowing through the lightning protection device, the step of controlling the ejection of the armature set in the neutral point protection gap of the transformer includes the following steps: when the current on the lightning protection device reaches a threshold value, the base of the lightning protection device provided by the lightning protection device is set to The coil in the neutral point protection gap of the transformer sends a control signal, and the coil installed on the armature controls the ejection of the armature according to the received control signal.
进一步的，击穿导通变压器中性点保护间隙的步骤包括以下步骤：变压器中性点保护间隙持续燃弧至避雷装置内部的过电压消失，衔铁复位。Further, the step of breaking through the neutral point protection gap of the transformer includes the following steps: the neutral point protection gap of the transformer continues to burn until the overvoltage inside the lightning arrester disappears, and the armature resets.
本发明的用于变压器中性点保护间隙动作的方法在具体实施时，衔铁的动作可由变压器中性点连接的避雷装置上的电流大小进行控制。例如：当避雷装置的避雷装置主体上的电流达到某一阈值时(例如几安培)，其中：该引起避雷装置上的电流达到某一阈值的情况包括变压器工频过电压、操作过电压等内部过电压，也包括避雷装置上可能出现的过高幅值的工频过电压和过高的残压等情况。When the method of the present invention for neutral point protection gap action of a transformer is implemented, the action of the armature can be controlled by the magnitude of the current on the lightning arrester connected to the neutral point of the transformer. For example: when the current on the main body of the lightning protection device of the lightning protection device reaches a certain threshold (for example, a few amperes), the conditions that cause the current on the lightning protection device to reach a certain threshold include transformer power frequency overvoltage, operating overvoltage, etc. Overvoltage also includes the possible occurrence of excessively high amplitude power frequency overvoltage and excessive residual voltage on the lightning protection device.
也就是说，当避雷装置上流过的电流大小达到预定值时，避雷装置启动，控制信号就会由避雷装置底座引出，并传递给与其相连的线圈；线圈在通电的状态下产生磁场，进而施加作用力在衔铁上使其弹出，进而引发中性点保护间隙击穿导通，保护避雷装置和其他设备。当中性点保护间隙击穿后，中性点保护间隙将持续燃弧至内部电压消失，此时电流变小，复位装置使衔铁复位。That is to say, when the current flowing through the lightning protection device reaches a predetermined value, the lightning protection device starts, and the control signal will be drawn from the base of the lightning protection device and transmitted to the coil connected to it; The force acts on the armature to make it pop up, which in turn causes the neutral point protection gap to break down and conduct, protecting the lightning arrester and other equipment. After the neutral point protection gap breaks down, the neutral point protection gap will continue to arc until the internal voltage disappears. At this time, the current becomes smaller, and the reset device resets the armature.
可以理解的是，通过选取不同保护间隙的长度或改变线圈的大小和圈数可使衔铁动作的同时中性点保护间隙能够被击穿导通；此外，无论发生内部过电压或是雷电过电压，由于控制信号由避雷装置底座引出，避雷装置均会首先启动。It can be understood that by selecting different lengths of the protection gap or changing the size and number of turns of the coil, the neutral point protection gap can be broken down and turned on while the armature is in motion; in addition, no matter internal overvoltage or lightning overvoltage occurs , since the control signal is drawn from the base of the lightning protection device, the lightning protection device will be activated first.
优选的，避雷装置上因雷电发生过电压和避雷装置底座向线圈发送控制信号之间发生机械延时，避雷装置内部的过电压由避雷装置主体泄放，衔铁固定不动。这是因为避雷装置主体上发生过电压和控制装置间接受控制信号间存在机械延时，而发生雷电过电压时，由于前述机械延时，当控制信号达到衔铁时，雷电波已经由避雷装置主体泄放，故衔铁将不会发生移动。Preferably, a mechanical delay occurs between the overvoltage on the lightning arrester due to lightning and the control signal sent from the base of the lightning arrester to the coil, the overvoltage inside the lightning arrester is released by the main body of the lightning arrester, and the armature is fixed. This is because there is a mechanical delay between the overvoltage on the main body of the lightning protection device and the indirect reception of the control signal by the control device. When the lightning overvoltage occurs, due to the aforementioned mechanical delay, when the control signal reaches the armature, the lightning wave has already passed through the main body of the lightning protection device. Bleed, so the armature will not move.
优选的，机械延时在0.01秒至1秒的范围内可调。Preferably, the mechanical delay is adjustable within the range of 0.01 second to 1 second.
实施本发明的用于变压器中性点保护间隙动作的方法及装置，具有如下有益效果，通过变压器中性点连接的避雷装置上流过的电流的大小决定衔铁的动作，使得中性点保护间隙在变压器工频过电压、操作过电压等内部过电压，以及避雷装置上可能出现的过高幅值的工频过电压和过高残压的情况下可靠动作，而发生雷电过电压时避雷装置可靠动作，从而保证避雷装置不会由于通电电流时间过长而发生爆炸，进而可以保证电网运营的可靠性。Implementing the method and device for the action of the transformer neutral point protection gap of the present invention has the following beneficial effects, the magnitude of the current flowing through the lightning arrester connected to the transformer neutral point determines the action of the armature, so that the neutral point protection gap is at Reliable operation under the condition of transformer power frequency overvoltage, operating overvoltage and other internal overvoltages, as well as excessively high amplitude power frequency overvoltage and excessive residual voltage that may appear on the lightning protection device, and the lightning protection device is reliable when lightning overvoltage occurs Action, so as to ensure that the lightning protection device will not explode due to too long energized current, thereby ensuring the reliability of power grid operation.
以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发明之权利范围，因此依本发明权利要求所作的等同变化，仍属本发明所涵盖的范围。The above disclosure is only a preferred embodiment of the present invention, which certainly cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310059960.0A CN103138237B (en) | 2013-02-26 | 2013-02-26 | Method and device for protecting gap action of transformer neutral point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310059960.0A CN103138237B (en) | 2013-02-26 | 2013-02-26 | Method and device for protecting gap action of transformer neutral point |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103138237A CN103138237A (en) | 2013-06-05 |
| CN103138237B true CN103138237B (en) | 2015-05-20 |
Family
ID=48497712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310059960.0A Active CN103138237B (en) | 2013-02-26 | 2013-02-26 | Method and device for protecting gap action of transformer neutral point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103138237B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030049B (en) * | 2019-11-19 | 2022-04-26 | 深圳供电局有限公司 | Transformer neutral point protection method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202231431U (en) * | 2011-09-14 | 2012-05-23 | 广东电网公司深圳供电局 | Novel grounding structure |
| CN202513569U (en) * | 2012-04-20 | 2012-10-31 | 安徽飞奇电气科技有限公司 | Transformer neutral point overvoltage protector |
| CN102916421A (en) * | 2012-10-22 | 2013-02-06 | 深圳供电局有限公司 | Transformer protection mechanism |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5004055B2 (en) * | 2008-03-12 | 2012-08-22 | 正次郎 大村 | Lightning protection gap element and lightning surge protection method for lightning strike of low voltage electric circuit equipped with the element |
-
2013
- 2013-02-26 CN CN201310059960.0A patent/CN103138237B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202231431U (en) * | 2011-09-14 | 2012-05-23 | 广东电网公司深圳供电局 | Novel grounding structure |
| CN202513569U (en) * | 2012-04-20 | 2012-10-31 | 安徽飞奇电气科技有限公司 | Transformer neutral point overvoltage protector |
| CN102916421A (en) * | 2012-10-22 | 2013-02-06 | 深圳供电局有限公司 | Transformer protection mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103138237A (en) | 2013-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2523292A1 (en) | A method and a system for protecting a power transformer against voltage surges while the circuit breaker is opening | |
| CN102916421B (en) | Transformer protection mechanism | |
| CN103138237B (en) | Method and device for protecting gap action of transformer neutral point | |
| CN108023275A (en) | A kind of outdoor arrester of adjustable clearance | |
| CN204928115U (en) | Information system entry end electromagnetic pulse synthesizes protective equipment | |
| CN104578105A (en) | Intelligent switching device and method of paralleling reactor | |
| EP2787589B1 (en) | Lightning protection circuit, switching power supply and lightning protection method | |
| JP2004158225A (en) | Lightning insulator device | |
| CN104682367A (en) | Novel thunder and lightning circuit breaker | |
| CN105071363A (en) | SPD backup protector | |
| CN204967222U (en) | Overcurrent protection structure | |
| CN207664440U (en) | A kind of outdoor arrester of adjustable clearance | |
| CN105071367A (en) | Electromagnetic pulse comprehensive protection apparatus at entry port of information system | |
| CN105140904A (en) | Power arc extinguishing system | |
| CN104917143A (en) | Lightning circuit breaker based on high-frequency inductive reactance test | |
| CN112117745A (en) | Dynamic insulation matching method and device for eliminating power frequency insulation strength loss | |
| CN103368165A (en) | Arc elimination and harmonic elimination and overvoltage protector | |
| CN202978223U (en) | Mechanism for controlling action of neutral point gap of transformer | |
| CN216121797U (en) | Transformer neutral point double-electrode controllable gap protection equipment | |
| CN203951159U (en) | A kind of surge protector redundant system | |
| CN103248037B (en) | The power distribution network damping circuit parameter tuning method of neutral by arc extinction coil grounding | |
| CN103259255B (en) | A kind of lightning protection circuit of network interface | |
| CN210074763U (en) | SPD for realizing surge protection of RS485 port by using electronic current limiter | |
| CN108198735A (en) | A kind of back-up protection device | |
| WO2021103017A1 (en) | Method for limiting lightning-strike flashover of dc electricity transmission line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |