CN203674711U - Automatic tracking and compensating device for arc-suppression coil of power distribution network - Google Patents
Automatic tracking and compensating device for arc-suppression coil of power distribution network Download PDFInfo
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Abstract
本实用新型涉及一种配电网消弧线圈自动跟踪补偿装置，包括消弧线圈，消弧线圈的一次侧与接地变压器相连，消弧线圈的二次侧连接有注入信号电源，注入信号电源包括依次连接的注入信号频率发生器、电压放大电路、功率放大电路、输出变压器和滤波电路，所述注入信号频率发生器与控制端相连，滤波电路与消弧线圈的二次侧连接，自动跟踪补偿装置还包括检测控制电路；本实用新型的有益效果在于，通过注入信号频率发生器向电网注入异于电网特征频率的恒频电流信号，经过消弧线圈将恒频电流信号耦合到电网系统中，同时通过对地分布电容、脱谐度和阻尼率以实现消弧线圈的自动跟踪补偿；此外，本实用新型设计原理可靠，结构简单，具有非常广泛的应用前景。
The utility model relates to an automatic tracking compensation device for an arc-suppression coil of a distribution network, which comprises an arc-suppression coil, the primary side of the arc-suppression coil is connected with a grounding transformer, and the secondary side of the arc-suppression coil is connected with an injection signal power supply, and the injection signal power supply includes Injection signal frequency generator, voltage amplifying circuit, power amplifying circuit, output transformer and filter circuit connected in sequence, the injection signal frequency generator is connected to the control terminal, the filter circuit is connected to the secondary side of the arc suppressing coil, automatic tracking compensation The device also includes a detection control circuit; the beneficial effect of the utility model is that a constant frequency current signal different from the characteristic frequency of the power grid is injected into the power grid through the injection signal frequency generator, and the constant frequency current signal is coupled into the power grid system through the arc suppression coil, At the same time, the automatic tracking compensation of the arc suppressing coil is realized through the distributed capacitance to the ground, the detuning degree and the damping rate; in addition, the utility model has a reliable design principle, a simple structure, and has a very wide application prospect.
Description
技术领域 technical field
本实用新型属于电力安全技术领域，涉及一种跟踪补偿装置，尤其是一种配电网消弧线圈自动跟踪补偿装置。 The utility model belongs to the technical field of electric power safety, and relates to a tracking compensation device, in particular to an automatic tracking compensation device for an arc suppression coil of a distribution network.
背景技术 Background technique
在电力系统中，单相接地故障作为一种故障形式频繁发生，据不完全统计，单向接地故障占所有故障总数的80％以上。当电网的单相接地电流大于一定值时，接地电弧不容易自行熄灭，使故障扩大，在电网的中性点与大地之间加装消弧线圈，可使容性电流得到补偿，从而使接地点的电流减小，使电弧不能维持从而自动熄灭。 In power systems, single-phase ground faults frequently occur as a form of fault. According to incomplete statistics, one-way ground faults account for more than 80% of all faults. When the single-phase grounding current of the power grid is greater than a certain value, the grounding arc is not easy to extinguish by itself, causing the fault to expand. Installing an arc suppression coil between the neutral point of the power grid and the ground can compensate the capacitive current, thereby making the grounding The current at the point decreases, so that the arc cannot be maintained and extinguished automatically.
目前，国内外常用的消弧线圈补偿方法有：位移电压曲线法，在线实时测量法，变频信号法等。由于这几种原理都有自身的局限性，从而造成自动跟踪补偿的实时性不强。 At present, the arc suppression coil compensation methods commonly used at home and abroad include: displacement voltage curve method, online real-time measurement method, frequency conversion signal method, etc. Since these principles have their own limitations, the real-time performance of automatic tracking compensation is not strong.
实用新型内容 Utility model content
本实用新型的目的在于，针对上述现有技术存在的缺陷，提供设计一种配电网消弧线圈自动跟踪补偿装置，以解决上述技术问题。 The purpose of this utility model is to provide and design a distribution network arc suppressing coil automatic tracking compensation device to solve the above technical problems.
为实现上述目的，本实用新型给出以下技术方案： In order to achieve the above object, the utility model provides the following technical solutions:
一种配电网消弧线圈自动跟踪补偿装置，包括消弧线圈；其特征在于：所述消弧线圈的一次侧与接地变压器相连，所述消弧线圈的二次侧连接有注入信号电源，所述注入信号电源包括依次连接的注入信号频率发生器、电压放大电路、功率放大电路、输出变压器和滤波电路，所述注入信号频率发生器与控制端相连，所述滤波电路与消弧线圈的二次侧连接，所述自动跟踪补偿装置还包括检测控制电路。 An arc suppression coil automatic tracking compensation device for a distribution network, comprising an arc suppression coil; characterized in that: the primary side of the arc suppression coil is connected to a grounding transformer, and the secondary side of the arc suppression coil is connected to an injected signal power supply, The injection signal power supply includes an injection signal frequency generator, a voltage amplifying circuit, a power amplifying circuit, an output transformer and a filter circuit connected in sequence, the injection signal frequency generator is connected to the control terminal, and the filter circuit is connected to the arc suppression coil The secondary side is connected, and the automatic tracking compensation device also includes a detection control circuit.
优选地，所述检测控制电路包括管理CPU，所述管理CPU与电压变送器相连。 Preferably, the detection control circuit includes a management CPU, and the management CPU is connected to the voltage transmitter.
优选地，所述管理CPU通过注入信号预处理电路与电流及电压变送器相连。 Preferably, the management CPU is connected to the current and voltage transmitters through an injected signal preprocessing circuit.
优选地，所述管理CPU通过零序电流预处理电路与电流及电压变送器相连。 Preferably, the management CPU is connected to the current and voltage transmitter through a zero-sequence current preprocessing circuit.
优选地，所述注入信号预处理电路包括依次连接的第一模数转换器、第一DSP、第一双口RAM，其中，所述第一模数转换器与电流及电压变送器相连接,所述第一双口RAM与管理CPU相连接。 Preferably, the injection signal preprocessing circuit includes a first analog-to-digital converter, a first DSP, and a first dual-port RAM connected in sequence, wherein the first analog-to-digital converter is connected to a current and voltage transmitter , the first dual-port RAM is connected to the management CPU.
优选地，所述零序电流预处理电路包括依次连接的第二模数转换器、第二DSP、第二双口RAM，其中，所述第二模数转换器与电流及电压变送器相连接，所述第二双口RAM与管理CPU相连接。 Preferably, the zero-sequence current preprocessing circuit includes a second analog-to-digital converter, a second DSP, and a second dual-port RAM connected in sequence, wherein the second analog-to-digital converter is in phase with the current and voltage transmitters connected, the second dual-port RAM is connected to the management CPU.
优选地，所述滤波电路包括串联谐振电路和并联谐振电路。 Preferably, the filter circuit includes a series resonant circuit and a parallel resonant circuit.
本实用新型的有益效果在于，通过注入信号频率发生器向电网注入异于电网特征频率的恒频电流信号，经过消弧线圈将恒频电流信号耦合到电网系统中，同时通过计算统计对地分布电容、脱谐度和阻尼率等参数以实现消弧线圈的自动跟踪补偿；此外，本实用新型设计原理可靠，结构简单，具有非常广泛的应用前景。 The beneficial effect of the utility model is that a constant-frequency current signal different from the characteristic frequency of the power grid is injected into the power grid through the injection signal frequency generator, and the constant-frequency current signal is coupled to the power grid system through the arc suppression coil, and at the same time, the ground distribution is calculated and counted Capacitance, detuning degree and damping rate and other parameters are used to realize the automatic tracking compensation of the arc suppressing coil; in addition, the utility model has a reliable design principle, a simple structure, and has a very wide application prospect.
附图说明 Description of drawings
图1为本实用新型提供的一种配电网消弧线圈自动跟踪补偿装置实施例的原理方框图。 Fig. 1 is a schematic block diagram of an embodiment of an automatic tracking compensation device for an arc suppressing coil of a distribution network provided by the utility model.
图2为本实用新型提供的一种配电网消弧线圈自动跟踪补偿装置的检测电路原理框图。 Fig. 2 is a schematic block diagram of a detection circuit of a distribution network arc suppressing coil automatic tracking compensation device provided by the utility model.
其中，1-消弧线圈，2-接地变压器，31-信号频率发生器，32-电压放大电路，33-功率放大电路，34-输出变压器，35-滤波电路，4-管理CPU，51-第一模数转换器，52-第一DSP，53-第一双口RAM，6-电流及电压变送器，71-第二数模转换器，72-第二DSP，73-第二双口RAM，8-电压变送器，9-控制端。 Among them, 1-arc suppression coil, 2-grounding transformer, 31-signal frequency generator, 32-voltage amplifying circuit, 33-power amplifying circuit, 34-output transformer, 35-filtering circuit, 4-management CPU, 51-the first 1 analog-to-digital converter, 52-first DSP, 53-first dual-port RAM, 6-current and voltage transmitter, 71-second digital-to-analog converter, 72-second DSP, 73-second dual-port RAM, 8-voltage transmitter, 9-control terminal.
具体实施方式 Detailed ways
下面结合附图并通过具体实施例对本实用新型进行详细阐述，以下实施例是对本实用新型的解释，而本实用新型并不局限于以下实施例。 The utility model is described in detail below with reference to the accompanying drawings and through specific embodiments. The following examples are explanations of the utility model, but the utility model is not limited to the following examples.
如图1和图2所示，本实用新型提供的一种配电网消弧线圈自动跟踪补偿装置，包括消弧线圈1，所述消弧线圈1的一次侧与接地变压器2相连，所述消弧线圈1的二次侧连接有注入信号电源，所述注入信号电源包括依次连接的注入信号频率发生器31、电压放大电路32、功率放大电路33、输出变压器34和滤波电路35，所述注入信号频率发生器与控制端9相连，所述滤波电路35与消弧线圈1的二次侧连接，所述自动跟踪补偿装置还包括检测控制电路。
As shown in Figure 1 and Figure 2, the utility model provides a distribution network arc suppression coil automatic tracking compensation device, including arc suppression coil 1, the primary side of the arc suppression coil 1 is connected with the grounding transformer 2, the The secondary side of the arc suppression coil 1 is connected with an injected signal power supply, which includes an injected
本实施例中，所述检测控制电路包括管理CPU4，所述管理CPU4与电压变送器8相连。 In this embodiment, the detection control circuit includes a management CPU 4 , and the management CPU 4 is connected to a voltage transmitter 8 .
本实施例中，所述管理CPU4通过注入信号预处理电路与电流及电压变送器6相连。 In this embodiment, the management CPU 4 is connected to the current and voltage transmitter 6 through an injected signal preprocessing circuit.
本实施例中，所述管理CPU4通过零序电流预处理电路与电流及电压变送器6相连。 In this embodiment, the management CPU 4 is connected to the current and voltage transmitter 6 through a zero-sequence current preprocessing circuit.
本实施例中，所述注入信号预处理电路包括依次连接的第一模数转换器51、第一DSP52、第一双口RAM53，其中，所述第一模数转换器51与电流及电压变送器6相连接，所述第一双口RAM53与管理CPU4相连接。
In this embodiment, the injection signal preprocessing circuit includes a first analog-to-digital converter 51, a
本实施例中，所述零序电流预处理电路包括依次连接的第二模数转换器71、第二DSP72、第二双口RAM73，其中，所述第二模数转换器71与电流及电压变送器6相连接，所述第二双口RAM73与管理CPU4相连接。
In this embodiment, the zero-sequence current preprocessing circuit includes a second analog-to-
本实施例中，所述滤波电路35包括串联谐振电路和并联谐振电路，串联谐振电路与并联谐振电路均采用现有技术，在此不再赘述。
In this embodiment, the
本实施例中，由信号频率发生器31输出恒频电流信号，该恒频电流信号经过消弧线圈1的耦合作用，由消弧线圈1的二次侧耦合到其一次侧，该恒频电流信号通过接地变压器2与大地后回到消弧线圈1一次侧的接地点，检测控制电路通过检测消弧线圈1一次侧接地点处信号的电流和母线电压互感器开口三角形绕组处的信号电压，并将检测到的电流信号和电压信号进行处理，根据处理后的结果对消弧线圈1作出调整，以实现消弧线圈1的自动跟踪补偿。
In this embodiment, the
以上公开的仅为本实用新型的优选实施方式，但本实用新型并非局限于此，任何本领域的技术人员能思之的没有创造性的变化，以及在不脱离本实用新型原理前提下所作的若干改进和润饰，都应落在本实用新型的保护范围内。 What is disclosed above is only the preferred embodiment of the present utility model, but the present utility model is not limited thereto, and any person skilled in the art can think of no creative changes, and some modifications made without departing from the principle of the present utility model. Improvement and retouching should all fall within the protection scope of the present utility model. the
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964001A (en) * | 2018-08-24 | 2018-12-07 | 国网河北省电力有限公司电力科学研究院 | Arc suppression coil of power distribution network tuning methods, terminal device and system |
| CZ308721B6 (en) * | 2014-08-28 | 2021-03-24 | Ege, Spol.S R.O. | Method and device for automatically adjusting continuously and/or discretely tunable quenching chokes in the compensated network of the electrical system |
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2013
- 2013-12-31 CN CN201320886335.9U patent/CN203674711U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ308721B6 (en) * | 2014-08-28 | 2021-03-24 | Ege, Spol.S R.O. | Method and device for automatically adjusting continuously and/or discretely tunable quenching chokes in the compensated network of the electrical system |
| CN108964001A (en) * | 2018-08-24 | 2018-12-07 | 国网河北省电力有限公司电力科学研究院 | Arc suppression coil of power distribution network tuning methods, terminal device and system |
| CN108964001B (en) * | 2018-08-24 | 2020-04-21 | 国网河北省电力有限公司电力科学研究院 | Arc suppression coil tuning method, terminal equipment and system for distribution network |
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