CN105188326A - Filtering system for inhibiting high-frequency strong interference signal of transformer station - Google Patents
Filtering system for inhibiting high-frequency strong interference signal of transformer station Download PDFInfo
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Abstract
本发明提供一种用于抑制变电站高频强干扰信号的滤波系统，包括耦合到遥信电缆上的干扰信号发生装置，该干扰信号发生装置包括依次相连的脉冲源、前过渡段、平行板段、后过渡段和终端器，前过渡段和后过渡段均为两个相对倾斜设置的斜金属板，平行板段之间形成一工作空间；还包括一屏蔽箱和设在屏蔽箱内的干扰信号采集装置，屏蔽箱包括箱体和门框，箱体上设有一截止波导管，门框上设有一指接弹簧，遥信电缆依次从指接弹簧和截止波导管中穿过；干扰信号采集装置包括示波器、以及与示波器相连接的探头。该滤波系统能够很好的模拟瞬态电磁脉冲对变电站中各设备所产生的干扰信号，从而根据干扰信号可拟定相应的抗干扰措施，保证变电站的正常运行。
The invention provides a filtering system for suppressing high-frequency and strong interference signals in substations, which includes an interference signal generating device coupled to a remote signal cable. The interference signal generating device includes a pulse source, a front transition section, a parallel plate section, and a rear The transition section and the terminator, the front transition section and the rear transition section are two slanted metal plates arranged at an inclination relative to each other, and a working space is formed between the parallel plate sections; it also includes a shielding box and interference signal collection in the shielding box The shielding box includes a box body and a door frame, a cut-off waveguide is arranged on the box body, a finger-joint spring is arranged on the door frame, and the remote signaling cable passes through the finger-joint spring and the cut-off waveguide in sequence; the interference signal acquisition device includes an oscilloscope, and probes connected to the oscilloscope. The filtering system can well simulate the interference signals generated by transient electromagnetic pulses on various equipment in the substation, so that corresponding anti-interference measures can be drawn up according to the interference signals to ensure the normal operation of the substation.
Description
技术领域technical field
本发明涉及电力系统技术领域，特别是涉及一种用于抑制变电站高频强干扰信号的滤波系统。The invention relates to the technical field of power systems, in particular to a filtering system for suppressing high-frequency strong interference signals of substations.
背景技术Background technique
变电站是把一些设备组装起来，用以切断或接通、改变或者调整电压，在电力系统中，变电站是输电和配电的集结点。变电站中的设备有开关、变压器、保护装置等，当变电站遇上雷击或故障或开关时，会产生一个瞬态电磁脉冲，该瞬态电磁脉冲对变电站中的设备、保护装置等产生一个干扰信号，从而影响各设备的正常运行。为了保证变电站中各设备的正常运行，应抑制或消除该瞬态电磁脉冲对变电站的干扰影响。A substation is an assembly of some equipment to cut off or switch on, change or adjust voltage. In the power system, a substation is a gathering point for power transmission and distribution. The equipment in the substation includes switches, transformers, protection devices, etc. When the substation encounters lightning strikes or faults or switches, a transient electromagnetic pulse will be generated, and the transient electromagnetic pulse will generate an interference signal to the equipment and protection devices in the substation. , thereby affecting the normal operation of each device. In order to ensure the normal operation of each equipment in the substation, the interference effect of the transient electromagnetic pulse on the substation should be suppressed or eliminated.
发明内容Contents of the invention
鉴于以上所述现有技术的缺陷和各种不足之处，本发明要解决的技术问题在于提供一种用于抑制变电站高频强干扰信号的滤波系统，该滤波系统能够模拟瞬态电磁脉冲对变电站中设备和保护装置所产生的干扰影响，进而为消除干扰影响而提供有力依据。In view of the defects and various deficiencies of the prior art described above, the technical problem to be solved by the present invention is to provide a filter system for suppressing high-frequency strong interference signals in substations, which can simulate the impact of transient electromagnetic pulses on substations Interference effects generated by equipment and protection devices, and then provide a strong basis for eliminating interference effects.
为实现上述目的，本发明提供一种用于抑制变电站高频强干扰信号的滤波系统，包括耦合到遥信电缆上的干扰信号发生装置，该干扰信号发生装置包括依次相连的脉冲源、前过渡段、平行板段、后过渡段和终端器，所述前过渡段和后过渡段均为两个相对倾斜设置的斜金属板，所述平行板段之间形成一工作空间；还包括一屏蔽箱和设在屏蔽箱内的干扰信号采集装置，所述屏蔽箱包括箱体和门框，所述箱体上设有一截止波导管，所述门框上设有一指接弹簧，所述遥信电缆依次从指接弹簧和截止波导管中穿过；所述干扰信号采集装置包括示波器、以及与示波器相连接的探头。In order to achieve the above object, the present invention provides a filter system for suppressing high-frequency strong interference signals in substations, including an interference signal generating device coupled to the remote signaling cable, the interference signal generating device includes sequentially connected pulse sources, front transition sections, The parallel plate section, the rear transition section and the terminator, the front transition section and the rear transition section are two oblique metal plates arranged at an inclination relative to each other, a working space is formed between the parallel plate sections; a shielding box and An interference signal acquisition device installed in a shielding box, the shielding box includes a box body and a door frame, the box body is provided with a cut-off waveguide, the door frame is provided with a finger-joint spring, and the remote signal cable is sequentially connected from the finger The connection spring and the cut-off waveguide pass through; the interference signal acquisition device includes an oscilloscope and a probe connected to the oscilloscope.
进一步地，所述遥信电缆上还固定有干扰抑制装置，该干扰抑制装置包括由塑料制成的外壳、以及设在外壳内的高导磁体，所述外壳一侧设有凹槽，另一侧设有与凹槽相适配的凸起。Further, an interference suppression device is fixed on the remote signaling cable, and the interference suppression device includes a casing made of plastic and a high-conductivity magnet set in the casing, a groove is provided on one side of the casing, and a groove is provided on the other side. The sides are provided with protrusions matching the grooves.
优选地，所述探头还通过一转接头与一信号采集装置衰减器相串接。Preferably, the probe is also connected in series with a signal acquisition device attenuator through an adapter.
进一步地，所述脉冲源为两个相互串联的电容放电式脉冲源发生器，所述电容放电式脉冲源发生器包括直流高压源、电容和电感，所述电容与直流高压源并联，电感与直流高压源串联。Further, the pulse source is two capacitor discharge pulse source generators connected in series, and the capacitor discharge pulse source generator includes a DC high voltage source, a capacitor and an inductor, the capacitor is connected in parallel with the DC high voltage source, and the inductor and DC high voltage sources are connected in series.
优选地，所述终端器为两个相互并联的120欧姆的水电阻。Preferably, the terminator is two 120-ohm water resistors connected in parallel.
优选地，所述工作空间长为2.5m，宽为2m，高为2m。Preferably, the working space is 2.5m long, 2m wide and 2m high.
本发明涉及的用于抑制变电站高频强干扰信号的滤波系统具有以下有益效果：The filtering system for suppressing high-frequency strong interference signals of substations involved in the present invention has the following beneficial effects:
该滤波系统能够很好的模拟瞬态电磁脉冲对变电站中各设备所产生的干扰信号，从而根据干扰信号可拟定相应的抗干扰措施，保证变电站的正常运行。The filtering system can well simulate the interference signals generated by transient electromagnetic pulses on various equipment in the substation, so that corresponding anti-interference measures can be drawn up according to the interference signals to ensure the normal operation of the substation.
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，并可依照说明书的内容予以实施，以下以本发明的较佳实施例并配合附图对本专利进行详细说明。The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the contents of the specification, the patent will be described in detail below with preferred embodiments of the present invention and accompanying drawings.
附图说明Description of drawings
图1为本发明中干扰信号发生装置的结构示意图。FIG. 1 is a schematic structural diagram of an interference signal generating device in the present invention.
图2为图1中脉冲源的结构示意图。Fig. 2 is a schematic structural diagram of the pulse source in Fig. 1 .
图3为本发明中屏蔽箱的结构示意图。Fig. 3 is a schematic structural diagram of a shielding box in the present invention.
图4为本发明中干扰信号采集装置的结构示意图。Fig. 4 is a schematic structural diagram of an interference signal acquisition device in the present invention.
图5为本发明中干扰抑制装置的结构示意图。Fig. 5 is a schematic structural diagram of the interference suppression device in the present invention.
元件标号说明Component designation description
1干扰信号发生装置1 Interference signal generating device
11脉冲源11 pulse sources
12前过渡段12 front transition
13平行板段13 parallel plate segments
14后过渡段14 post transition section
15终端器15 terminators
16工作空间16 working spaces
2屏蔽箱2 shielding box
21指接弹簧21 finger spring
22截止波导管22 cut-off waveguide
3干扰信号采集装置3 Interference signal acquisition device
31示波器31 oscilloscope
32探头32 probes
33信号采集装置衰减器33 signal acquisition device attenuator
4干扰抑制装置4 Interference suppression device
41外壳41 shell
42高导磁体42 high permeability magnet
43凹槽43 grooves
44凸起44 raised
具体实施方式Detailed ways
下面结合附图对本发明的优选实施例进行详细介绍。Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
如图1所示，本发明提供一种用于抑制变电站高频强干扰信号的滤波系统，包括耦合到遥信电缆上的干扰信号发生装置1，该干扰信号发生装置1包括依次相连的脉冲源11、前过渡段12、平行板段13、后过渡段14和终端器15，所述前过渡段12和后过渡段14均为两个相对倾斜设置的斜金属板，所述平行板段13之间形成一工作空间16，优选地，所述工作空间16长为2.5m，宽为2m，高为2m；还包括一屏蔽箱2和设在屏蔽箱2内的干扰信号采集装置3，见图3和图4，所述屏蔽箱2包括箱体和门框，所述箱体上设有一截止波导管22，所述门框上设有一指接弹簧21，所述遥信电缆依次从指接弹簧21和截止波导管22中穿过；所述干扰信号采集装置3包括示波器31、以及与示波器31相连接的探头32。As shown in Fig. 1, the present invention provides a kind of filter system that is used to suppress the high-frequency strong interference signal of substation, comprises the interference signal generation device 1 that is coupled on the remote signaling cable, and this interference signal generation device 1 comprises the pulse source 11 that is connected in sequence, The front transition section 12, the parallel plate section 13, the rear transition section 14 and the terminator 15, the front transition section 12 and the rear transition section 14 are two oblique metal plates arranged on an incline, between the parallel plate sections 13 Form a working space 16, preferably, the working space 16 is 2.5m long, 2m wide, and 2m high; it also includes a shielding box 2 and an interference signal acquisition device 3 located in the shielding box 2, see Fig. 3 4, the shielding box 2 includes a box body and a door frame, the box body is provided with a cut-off waveguide 22, the door frame is provided with a finger-joint spring 21, and the remote signal cable is sequentially connected from the finger-joint spring 21 and The cut-off waveguide 22 passes through; the interference signal acquisition device 3 includes an oscilloscope 31 and a probe 32 connected to the oscilloscope 31 .
该滤波系统中，干扰信号发生装置1的脉冲源11用于产生高频强电磁场，以模拟雷击、故障、开关时变电站电力系统中所产生的瞬态电磁脉冲，同时将该高频强电磁场在遥信电缆上耦合高频干扰，该干扰信号经过探头32后减小，最后进入到位于屏蔽箱2内的干扰信号采集装置3，用于完成干扰信号的采集、存储和显示，所述示波器31优选采用TEKTPS2024示波器，该示波器有四个通道，可以同时采集思路干扰信号并进行显示，提高效率。所述屏蔽箱2用于防止外部的辐射电磁能进入某一区域，干扰屏蔽箱2内部的干扰信号采集装置3，从而保证干扰信号采集装置3测量准确、且不损坏；所述门框上的指接弹簧21保证关上门以后，对射频干扰有屏蔽左右，能够保持接触面的射频屏蔽完整性；箱体上的截止波导管22保证波导管相对于要屏蔽的射频处于截止状态。In this filter system, the pulse source 11 of the interference signal generating device 1 is used to generate a high-frequency strong electromagnetic field to simulate the transient electromagnetic pulse generated in the power system of the substation during lightning strikes, faults, and switches, and at the same time, the high-frequency strong electromagnetic field is applied to the remote signaling cable. Coupling high-frequency interference, the interference signal is reduced after passing through the probe 32, and finally enters the interference signal acquisition device 3 located in the shielding box 2 to complete the acquisition, storage and display of the interference signal. The oscilloscope 31 is preferably a TEKTPS2024 oscilloscope , the oscilloscope has four channels, which can collect and display the interference signals of ideas at the same time to improve efficiency. The shielding box 2 is used to prevent external radiated electromagnetic energy from entering a certain area and interfere with the interference signal acquisition device 3 inside the shielding box 2, thereby ensuring that the interference signal acquisition device 3 measures accurately and is not damaged; the finger on the door frame Connect the spring 21 to ensure that after the door is closed, the radio frequency interference is shielded left and right, and the radio frequency shielding integrity of the contact surface can be maintained; the cut-off waveguide 22 on the box ensures that the waveguide is in a cut-off state relative to the radio frequency to be shielded.
另外，干扰信号发生装置1产生的高频强电磁场在遥信电缆上干扰幅度较大，会对最终的测量结果产生一定的影响，故本发明中，所述遥信电缆上还固定有干扰抑制装置4，见图5，该干扰抑制装置4包括由塑料制成的外壳41、以及设在外壳41内的高导磁体42，所述外壳41一侧设有凹槽43，另一侧设有与凹槽43相适配的凸起44。通过外壳41上凹槽43和凸起44的相互配合可将该干扰抑制装置4卡在遥信电缆的芯线上，所述干扰抑制装置4等效为一个电阻和一个电感，电感可以抑制干扰信号的陡度，并将干扰信号的能力进行存储，电阻可将干扰信号的能量进行消耗，并以热量的形式散发，因此高导磁体42可以抑制干扰信号的幅值及陡度，从而抑制遥信电缆中产生的干扰信号。In addition, the high-frequency strong electromagnetic field generated by the interference signal generating device 1 has a relatively large interference range on the remote signaling cable, which will have a certain impact on the final measurement result. Therefore, in the present invention, an interference suppression device 4 is also fixed on the remote signaling cable. , see Fig. 5, the interference suppression device 4 includes a shell 41 made of plastic, and a highly permeable magnet 42 set in the shell 41, a groove 43 is provided on one side of the shell 41, and a groove 43 is provided on the other side. Groove 43 fits protrusion 44 . The interference suppression device 4 can be clamped on the core wire of the remote signaling cable through the mutual cooperation of the groove 43 and the protrusion 44 on the shell 41. The interference suppression device 4 is equivalent to a resistor and an inductance, and the inductance can suppress interference. The steepness of the signal, and the ability to store the interference signal, the resistance can consume the energy of the interference signal, and dissipate it in the form of heat, so the high permeability magnet 42 can suppress the amplitude and steepness of the interference signal, thereby inhibiting the remote Interference signals generated in the signal cable.
优选地，由于干扰信号发生装置1耦合到遥信电缆上的干扰很大，超出了干扰信号采集装置3的测量范围，故本实施例中，如图4所示，所述探头32还通过一转接头与一信号采集装置衰减器33相串接。所述信号采集装置衰减器33可将干扰信号衰减10倍，而探头32本身也可将干扰信号衰减10倍，故两者通过转接头串接后，可将干扰信号衰减100倍，衰减后的干扰信号直接进入干扰信号采集装置3，此时调整干扰信号采集装置3的放大倍数为100倍，则干扰信号采集装置3所显示的信号即为实际的干扰信号。Preferably, since the interference signal generating device 1 coupled to the remote signal cable is very large, beyond the measurement range of the interference signal acquisition device 3, so in this embodiment, as shown in Figure 4, the probe 32 is also passed through a The adapter is connected in series with a signal acquisition device attenuator 33 . The signal acquisition device attenuator 33 can attenuate the interference signal by 10 times, and the probe 32 itself can also attenuate the interference signal by 10 times, so after the two are connected in series through the adapter, the interference signal can be attenuated by 100 times, and the attenuated The interference signal directly enters the interference signal acquisition device 3, and the magnification of the interference signal acquisition device 3 is adjusted to 100 times at this time, then the signal displayed by the interference signal acquisition device 3 is the actual interference signal.
进一步地，见图2，所述脉冲源11为两个相互串联的电容放电式脉冲源发生器，所述电容放电式脉冲源发生器包括直流高压源、电容C和电感Ls，所述电容与直流高压源并联，电感与直流高压源串联，其为一标准的RLC串联放电回路，电路的方程为由直流高压源相无感或低电感的电容C充电至U0，然后在触发条件下通过开关相负载放电，脉冲源11输出的电压峰值可高达120KV，且连续可调，故可在长×宽×高＝2.5m×2.0m×2.0m工作空间16内形成高达50KV/m的峰值场强，脉冲的上升沿最短可达到2.5ns，波形宽度20ns-30ns，电场极化方向垂直向上。Further, as shown in Fig. 2, the pulse source 11 is two capacitor discharge pulse source generators connected in series, and the capacitor discharge pulse source generator includes a DC high voltage source, a capacitor C and an inductance Ls, and the capacitor and The DC high voltage source is connected in parallel, and the inductor is connected in series with the DC high voltage source. It is a standard RLC series discharge circuit, and the circuit equation is It is charged to U0 by the non-inductive or low-inductance capacitor C of the DC high-voltage source phase, and then discharged through the switch phase load under the trigger condition. The peak voltage output by the pulse source 11 can be as high as 120KV, and it is continuously adjustable, so it can be adjusted in length × width × height = 2.5m × 2.0m × 2.0m A peak field strength of up to 50KV/m is formed in the working space 16, the rising edge of the pulse can be as short as 2.5ns, the waveform width is 20ns-30ns, and the electric field polarization direction is vertically upward.
优选地，所述终端器15为两个相互并联的120欧姆的水电阻。Preferably, the terminator 15 is two 120-ohm water resistors connected in parallel.
综上所述，本发明有效克服了现有技术中的种种缺点而具高度产业利用价值。To sum up, the present invention effectively overcomes various shortcomings in the prior art and has high industrial application value.
以上对本发明实施例所提供的一种用于抑制变电站高频强干扰信号的滤波系统进行了详细介绍，对于本领域的一般技术人员，依据本发明实施例的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制，凡依本发明设计思想所做的任何改变都在本发明的保护范围之内。A filter system for suppressing high-frequency strong interference signals in substations provided by the embodiments of the present invention has been described above in detail. For those of ordinary skill in the art, based on the ideas of the embodiments of the present invention, both in terms of specific implementation and application range There will be changes. In summary, the content of this specification should not be understood as limiting the present invention, and any changes made according to the design concept of the present invention are within the protection scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410240489.XA CN105188326B (en) | 2014-05-30 | 2014-05-30 | For suppressing the filtering system of transformer station's high frequency high reject signal |
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| CN201410240489.XA CN105188326B (en) | 2014-05-30 | 2014-05-30 | For suppressing the filtering system of transformer station's high frequency high reject signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110808799A (en) * | 2019-12-12 | 2020-02-18 | 国网湖北省电力有限公司计量中心 | Electric energy meter and acquisition terminal product operation condition simulation device |
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| CN101510669A (en) * | 2009-01-24 | 2009-08-19 | 国网电力科学研究院 | Shielding design method for protection chamber |
| CN201788255U (en) * | 2010-08-19 | 2011-04-06 | 河南省电力公司郑州供电公司 | Partial discharge ultra-high frequency online detecting system |
| CN102412514A (en) * | 2011-11-02 | 2012-04-11 | 苏州爱信输配电设备有限公司 | Box-type substation shell possessing electromagnetic shielding function |
| CN203984874U (en) * | 2014-05-30 | 2014-12-03 | 国家电网公司 | For suppressing the filtering system of transformer station's high frequency high reject signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510669A (en) * | 2009-01-24 | 2009-08-19 | 国网电力科学研究院 | Shielding design method for protection chamber |
| CN201788255U (en) * | 2010-08-19 | 2011-04-06 | 河南省电力公司郑州供电公司 | Partial discharge ultra-high frequency online detecting system |
| CN102412514A (en) * | 2011-11-02 | 2012-04-11 | 苏州爱信输配电设备有限公司 | Box-type substation shell possessing electromagnetic shielding function |
| CN203984874U (en) * | 2014-05-30 | 2014-12-03 | 国家电网公司 | For suppressing the filtering system of transformer station's high frequency high reject signal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110808799A (en) * | 2019-12-12 | 2020-02-18 | 国网湖北省电力有限公司计量中心 | Electric energy meter and acquisition terminal product operation condition simulation device |
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| CN105188326B (en) | 2018-01-16 |
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