CN206096309U - Ferroresonance detects and prevention and cure combined test platform - Google Patents
Ferroresonance detects and prevention and cure combined test platform Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
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Abstract
本实用新型提供了一种铁磁谐振检测及防治综合试验平台，包括三相电源、升压变压器、消弧线圈成套装置、电流互感器、电压互感器、二次消谐装置、一次消谐装置、电容器、绝缘杆、接地接触板和高速录波仪。通过挂有接地线的绝缘杆和接地接触板的接触，对我国配电网普遍采用的中性点不接地和中性点经消弧线圈接地这两种接地方式下人工单相短路接地情况下可能出现的铁磁谐振进行检测；并通过投切一次消谐装置或二次消谐装置对铁磁谐振现象进行消谐。本实用新型提供的铁磁谐振检测及防治综合试验平台不仅可以模拟铁磁谐振的产生，而且可以通过消谐装置对铁磁谐振现象进行防治并对消谐装置的消谐效果进行分析评估。
The utility model provides a comprehensive test platform for ferromagnetic resonance detection and prevention, including a three-phase power supply, a step-up transformer, a complete set of arc suppression coils, a current transformer, a voltage transformer, a secondary resonance elimination device, and a primary resonance elimination device , capacitors, insulating rods, ground contact plates and high-speed wave recorders. Through the contact between the insulating rod with the grounding wire and the grounding contact plate, in the case of artificial single-phase short-circuit grounding under the two grounding methods generally adopted in my country's distribution network, the neutral point is not grounded and the neutral point is grounded through the arc suppression coil. The possible ferromagnetic resonance is detected; and the ferromagnetic resonance phenomenon is eliminated by switching the primary resonance elimination device or the secondary resonance elimination device. The comprehensive test platform for detection and prevention of ferromagnetic resonance provided by the utility model can not only simulate the generation of ferromagnetic resonance, but also prevent and control the ferromagnetic resonance phenomenon through the resonance elimination device and analyze and evaluate the resonance elimination effect of the resonance elimination device.
Description
技术领域technical field
本实用新型涉及电力系统试验平台，尤其涉及一种铁磁谐振检测及防治综合试验平台。The utility model relates to a power system test platform, in particular to a comprehensive test platform for ferromagnetic resonance detection and prevention.
背景技术Background technique
智能电网的建设、配电网自动化水平的提升以及电网规模的不断扩大，给人们带来巨大的便利的同时也对电力部门提出了更高的要求。电力系统中既包含变压器、电压互感器等电感元件，也有包含补偿电容器等电容元件，在开关操作或发生故障时，这些电感和电容元件参数可能匹配，在外加电源作用下产生铁磁谐振。铁磁谐振容易引起的过电流和过电压，对电力系统的安全运行威胁很大，往往造成避雷器爆炸、变压器烧毁等电气设备损坏的事故，严重时甚至造成人员伤亡。铁磁谐振问题对电网的安全稳定运行带来的巨大威胁，已经引起了电力部门和研究人员的极大重视。The construction of the smart grid, the improvement of the automation level of the distribution network, and the continuous expansion of the grid scale have brought great convenience to people, but also put forward higher requirements for the power sector. The power system contains not only inductive components such as transformers and voltage transformers, but also capacitive components such as compensation capacitors. When switching operations or failures occur, the parameters of these inductive and capacitive components may match, and ferromagnetic resonance will be generated under the action of an external power supply. The overcurrent and overvoltage easily caused by ferromagnetic resonance pose a great threat to the safe operation of the power system, often causing accidents such as lightning arrester explosions, transformer burnouts, and other electrical equipment damage, and even casualties in severe cases. The huge threat of ferromagnetic resonance to the safe and stable operation of the power grid has attracted great attention from the power sector and researchers.
相关技术中，铁磁谐振的防治问题在不断努力下已有长足的进步，为了将防治方案的使用性能进行现场试验分析，研究人员建立了各种故障模拟试验平台。例如，在相关技术中提供的抑制电力系统铁磁谐振的仿真模型，包括三相电源、电压互感器、电压表、示波器和主变压器，其中，三相电源的中性点连接电压表后接地，电压互感器的中性点直接接地，主变压器的中性点经过串联开关和电阻后接地。上述仿真模型可以验证铁磁谐振现象的发生，并找出输电线路对地电容(即输电线路长度)、单相接地故障发生和故障恢复的时刻是激发铁磁谐振的主要原因，同时通过电路设计中的开关在铁磁谐振发生时进行简单抑制。In related technologies, the prevention and treatment of ferromagnetic resonance has made great progress with continuous efforts. In order to conduct field test analysis on the performance of the prevention and control scheme, researchers have established various fault simulation test platforms. For example, the simulation model for suppressing ferromagnetic resonance in the power system provided in the related art includes three-phase power supply, voltage transformer, voltmeter, oscilloscope and main transformer, wherein the neutral point of the three-phase power supply is connected to the ground after the voltmeter, The neutral point of the voltage transformer is directly grounded, and the neutral point of the main transformer is grounded after passing through a series switch and a resistor. The above simulation model can verify the occurrence of ferromagnetic resonance, and find out that the capacitance of the transmission line to ground (that is, the length of the transmission line), the time of single-phase ground fault occurrence and fault recovery are the main reasons for exciting ferromagnetic resonance, and at the same time through the circuit design The switch in , simply suppresses the ferroresonance when it occurs.
但是，上述的抑制电力系统铁磁谐振的仿真模型中只存在中性点不接地这一种接地方式，以关闭主变压器中性点和电阻之间的开关接入电阻，以中性点电阻接地的方式对铁磁谐振现象进行防治，除此之外没有其他装置对铁磁谐振进行防治，消谐效果有限。此外，这种仿真模型无法模拟中性点经消弧线圈成套装置接地情况下的铁磁谐振现象，进一步地无法对这种接地方式下的铁磁谐振进行检测与防治。However, in the above-mentioned simulation model for suppressing ferromagnetic resonance in the power system, there is only a grounding method that the neutral point is not grounded, so as to close the switch access resistance between the neutral point of the main transformer and the resistance, and ground the neutral point resistance There is no other device to prevent and control ferromagnetic resonance, and the effect of harmonic elimination is limited. In addition, this simulation model cannot simulate the ferromagnetic resonance phenomenon when the neutral point is grounded through the complete set of arc suppression coils, and it is further impossible to detect and prevent ferromagnetic resonance in this grounding mode.
实用新型内容Utility model content
为克服相关技术中存在的问题，本实用新型提供一种铁磁谐振检测及防治综合试验平台，对电力系统中经常出现的铁磁谐振问题进行检测与防治。In order to overcome the problems in the related technologies, the utility model provides a comprehensive test platform for ferromagnetic resonance detection and prevention, which detects and prevents ferromagnetic resonance problems that often occur in power systems.
为了达到上述目的，本实用新型提供如下技术方案：In order to achieve the above object, the utility model provides the following technical solutions:
一种铁磁谐振检测及防治综合试验平台，包括三相电源、升压变压器、消弧线圈成套装置、电流互感器、电压互感器、二次消谐装置、一次消谐装置、电容器、绝缘杆、接地接触板和高速录波仪，其中：A comprehensive test platform for ferromagnetic resonance detection and prevention, including a three-phase power supply, a step-up transformer, a complete set of arc suppression coils, a current transformer, a voltage transformer, a secondary resonance elimination device, a primary resonance elimination device, a capacitor, and an insulating rod , ground contact plate and high-speed oscilloscope, of which:
所述升压变压器的低压侧与所述三相电源电连接，所述升压变压器的高压侧中性点通过所述消弧线圈成套装置接地；The low-voltage side of the step-up transformer is electrically connected to the three-phase power supply, and the neutral point of the high-voltage side of the step-up transformer is grounded through the arc suppression coil complete set;
所述电流互感器、电容器和接地接触板均并联连接于所述升压变压器的高压侧；The current transformer, the capacitor and the grounding contact plate are all connected in parallel to the high voltage side of the step-up transformer;
所述电流互感器的一次侧分别与所述升压变压器高压侧和所述电压互感器的一次侧电连接，所述电流互感器的二次侧与所述高速录波仪的电流输入端电连接；The primary side of the current transformer is electrically connected to the high voltage side of the step-up transformer and the primary side of the voltage transformer respectively, and the secondary side of the current transformer is electrically connected to the current input terminal of the high-speed wave recorder. connect;
所述一次消谐装置与所述电压互感器的N端电连接，所述二次消谐装置与所述高速录波仪的电压输入端并联连接于所述电压互感器二次侧开口三角；The primary harmonic elimination device is electrically connected to the N terminal of the voltage transformer, and the secondary harmonic elimination device is connected in parallel with the voltage input end of the high-speed wave recorder to the open triangle on the secondary side of the voltage transformer;
所述电容器的一端电连接至所述升压变压器高压侧，所述电容器的另一端接地；One end of the capacitor is electrically connected to the high voltage side of the step-up transformer, and the other end of the capacitor is grounded;
所述接地接触板电连接至所述升压变压器高压侧，所述绝缘杆可与所述接地接触板接触连接，所述绝缘杆挂有接地线。The ground contact plate is electrically connected to the high-voltage side of the step-up transformer, the insulating rod can be contacted and connected to the ground contact plate, and a ground wire is hung on the insulating rod.
优选的，上述铁磁谐振检测及防治综合试验平台中，还包括避雷器，其中：Preferably, the above-mentioned ferromagnetic resonance detection and prevention comprehensive test platform also includes a lightning arrester, wherein:
所述避雷器分别与所述电流互感器、电容器和接地接触板并联设置，所述避雷器的一端与所述升压变压器高压侧电连接，所述避雷器的另一端接地。The lightning arrester is arranged in parallel with the current transformer, the capacitor and the grounding contact plate respectively, one end of the lightning arrester is electrically connected to the high voltage side of the step-up transformer, and the other end of the lightning arrester is grounded.
优选的，上述铁磁谐振检测及防治综合试验平台中，所述避雷器包括氧化锌避雷器。Preferably, in the above comprehensive test platform for ferromagnetic resonance detection and prevention, the arrester includes a zinc oxide arrester.
优选的，上述铁磁谐振检测及防治综合试验平台中，还包括熔断器，其中：Preferably, the above-mentioned comprehensive test platform for ferromagnetic resonance detection and prevention also includes a fuse, wherein:
所述熔断器串联设置于所述升压变压器与所述电流互感器之间，所述熔断器的一端与所述升压变压器高压侧电连接，所述熔断器的另一端与所述电流互感器的一次侧电连接。The fuse is arranged in series between the step-up transformer and the current transformer, one end of the fuse is electrically connected to the high-voltage side of the step-up transformer, and the other end of the fuse is connected to the current transformer The primary side of the device is electrically connected.
优选的，上述铁磁谐振检测及防治综合试验平台中，还包括高压探头，其中：Preferably, the above-mentioned comprehensive test platform for ferromagnetic resonance detection and prevention also includes a high-voltage probe, wherein:
所述高压探头的一端电连接至所述升压变压器高压侧，所述高压探头的另一端与所述高速录波仪的电压输入端电连接。One end of the high-voltage probe is electrically connected to the high-voltage side of the step-up transformer, and the other end of the high-voltage probe is electrically connected to the voltage input end of the high-speed oscilloscope.
优选的，上述铁磁谐振检测及防治综合试验平台中，还包括电气控制箱，其中：Preferably, the above-mentioned comprehensive test platform for ferromagnetic resonance detection and prevention also includes an electrical control box, wherein:
所述电气控制箱具有分别控制所述三相电源、消弧线圈成套装置、电压互感器、一次消谐装置、二次消谐装置和电容器投切的六个开关。The electrical control box has six switches for respectively controlling the three-phase power supply, arc suppression coil complete set, voltage transformer, primary harmonic elimination device, secondary harmonic elimination device and capacitor switching.
优选的，上述铁磁谐振检测及防治综合试验平台中，所述三相电源包括400V三相交流电源。Preferably, in the above comprehensive test platform for ferromagnetic resonance detection and prevention, the three-phase power supply includes a 400V three-phase AC power supply.
优选的，上述铁磁谐振检测及防治综合试验平台中，所述接地接触板与地面保持安全距离，所述接地接触板包括金属接地接触板，所述安全距离包括0.5-1.0m。Preferably, in the above-mentioned comprehensive test platform for ferromagnetic resonance detection and prevention, the ground contact plate maintains a safe distance from the ground, the ground contact plate includes a metal ground contact plate, and the safe distance includes 0.5-1.0m.
本实用新型提供了一种铁磁谐振检测及防治综合试验平台，包括三相电源、升压变压器、消弧线圈成套装置、电流互感器、电压互感器、二次消谐装置、一次消谐装置、电容器、绝缘杆、接地接触板和高速录波仪。一方面，可通过挂有接地线的绝缘杆和接地接触板的接触，对我国配电网普遍采用的中性点不接地和中性点经消弧线圈接地这两种接地方式下人工单相短路接地情况下可能出现的铁磁谐振进行检测；另一方面，当铁磁谐振发生时，通过投切一次消谐装置或二次消谐装置对铁磁谐振现象进行消谐。整个铁磁谐振的检测和消谐过程，通过电流互感器、电压互感器和高压探头分别对线路中过电流、过电压和线路电压进行测量并在与它们电连接的高速录波仪上显示。本实用新型提供的铁磁谐振检测及防治综合试验平台不仅可以模拟不同接地方式下人工单相短路接地时产生的铁磁谐振现象，而且可以通过消谐装置对铁磁谐振现象进行防治并对消谐装置的消谐效果进行分析评估。The utility model provides a comprehensive test platform for ferromagnetic resonance detection and prevention, including a three-phase power supply, a step-up transformer, a complete set of arc suppression coils, a current transformer, a voltage transformer, a secondary resonance elimination device, and a primary resonance elimination device , capacitors, insulating rods, ground contact plates and high-speed wave recorders. On the one hand, through the contact between the insulating rod with the grounding wire and the grounding contact plate, the artificial single-phase The ferromagnetic resonance that may occur in the case of short circuit grounding is detected; on the other hand, when ferromagnetic resonance occurs, the ferromagnetic resonance phenomenon is eliminated by switching the primary resonance elimination device or the secondary resonance elimination device. During the entire ferromagnetic resonance detection and harmonic elimination process, the overcurrent, overvoltage and line voltage in the line are measured respectively through the current transformer, voltage transformer and high voltage probe, and displayed on the high-speed oscilloscope electrically connected to them. The ferromagnetic resonance detection and prevention comprehensive test platform provided by the utility model can not only simulate the ferromagnetic resonance phenomenon generated when artificial single-phase short-circuit grounding under different grounding methods, but also prevent and eliminate the ferromagnetic resonance phenomenon through the harmonic elimination device. Analyze and evaluate the harmonic elimination effect of the harmonic device.
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本实用新型。It should be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention.
附图说明Description of drawings
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本实用新型的实施例，并与说明书一起用于解释本实用新型的原理。The accompanying drawings, which are incorporated in the specification and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and are used together with the specification to explain the principle of the utility model.
为了更清楚地说明本实用新型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，对于本领域普通技术人员而言，在不付出创造性劳动性的前提下，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 accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art In other words, other drawings can also be obtained from these drawings without paying creative labor.
图1为本实用新型实施例提供的一种铁磁谐振检测及防治综合试验平台的结构示意图；Fig. 1 is a schematic structural diagram of a comprehensive test platform for ferromagnetic resonance detection and prevention provided by the embodiment of the present invention;
图2为本实用新型实施例提供的另一种铁磁谐振检测及防治综合试验平台的结构示意图。Fig. 2 is a structural schematic diagram of another comprehensive test platform for ferromagnetic resonance detection and prevention provided by the embodiment of the present invention.
上述图1-图2中：1-升压变压器、2-消弧线圈成套装置、3-避雷器、4-熔断器、5-电流互感器、6-电压互感器、7-二次消谐装置、8-一次消谐装置、9-电容器、10-绝缘杆、11-接地接触板、12-电气控制箱、13-高速录波仪、14-高压探头。In the above Figures 1-2: 1-boost transformer, 2-arc suppression coil complete set, 3-lightning arrester, 4-fuse, 5-current transformer, 6-voltage transformer, 7-secondary harmonic elimination device , 8-primary harmonic elimination device, 9-capacitor, 10-insulating rod, 11-ground contact plate, 12-electrical control box, 13-high-speed wave recorder, 14-high voltage probe.
具体实施方式detailed description
本实用新型提供了一种铁磁谐振检测及防治综合试验平台，用以对电力系统中经常出现的铁磁谐振问题进行检测与防治。下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。The utility model provides a comprehensive test platform for ferromagnetic resonance detection and prevention and control, which is used for detection and prevention of ferromagnetic resonance problems that often occur in power systems. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.
实施例一Embodiment one
参见图1，为本实用新型实施例提供的一种铁磁谐振检测及防治综合试验平台的结构示意图，如图1所示，所述铁磁谐振检测及防治综合试验平台包括三相电源、升压变压器1、消弧线圈成套装置2、电流互感器5、电压互感器6、二次消谐装置7、一次消谐装置8、电容器9、绝缘杆10、接地接触板11和高速录波仪13，其中：Referring to Fig. 1, it is a schematic structural diagram of a ferromagnetic resonance detection and prevention comprehensive test platform provided by the embodiment of the utility model. As shown in Fig. 1, the ferromagnetic resonance detection and prevention comprehensive test platform includes a three-phase power supply, a Voltage transformer 1, arc suppression coil complete set 2, current transformer 5, voltage transformer 6, secondary harmonic elimination device 7, primary harmonic elimination device 8, capacitor 9, insulating rod 10, grounding contact plate 11 and high-speed wave recorder 13, of which:
在试验平台的实际应用中一般选择400V交流三相电源，升压变压器1的低压侧与三相电源电连接，将升压变压器1的高压侧中性点通过消弧线圈成套装置2接地，通过投切消弧线圈成套装置2真实模拟我国配电网普遍采用的中性点经过消弧线圈接地和中性点不接地这两种接地方式。In the actual application of the test platform, a 400V AC three-phase power supply is generally selected, and the low-voltage side of the step-up transformer 1 is electrically connected to the three-phase power supply. Switching arc suppressing coil complete set 2 truly simulates the two grounding methods commonly used in my country's distribution network, the neutral point is grounded through the arc suppressing coil and the neutral point is not grounded.
电流互感器5、电容器9和接地接触板11均并联连接于升压变压器1的高压侧，电流互感器5的一次侧分别与升压变压器1高压侧和电压互感器6的一次侧电连接，电流互感器5的二次侧与高速录波仪13的电流输入端电连接，接地短路产生的流过电压互感器6的零序电流通过电流互感器5进行检测，并由高速录波仪13进行实时显示与记录。The current transformer 5, the capacitor 9 and the grounding contact plate 11 are all connected in parallel to the high-voltage side of the step-up transformer 1, and the primary side of the current transformer 5 is electrically connected to the high-voltage side of the step-up transformer 1 and the primary side of the voltage transformer 6 respectively, The secondary side of the current transformer 5 is electrically connected to the current input terminal of the high-speed oscilloscope 13, and the zero-sequence current flowing through the voltage transformer 6 generated by the grounding short circuit is detected by the current transformer 5, and is detected by the high-speed oscilloscope 13 Real-time display and recording.
电容器9的一端电连接至升压变压器1高压侧，电容器9的另一端接地，通过更换不同电容值的电容器9，更为全面的探讨铁磁谐振的发生条件、影响因素和防治效果。One end of the capacitor 9 is electrically connected to the high-voltage side of the step-up transformer 1, and the other end of the capacitor 9 is grounded. By replacing the capacitor 9 with different capacitance values, the occurrence conditions, influencing factors and prevention effects of ferromagnetic resonance are more comprehensively discussed.
接地接触板11电连接至升压变压器1高压侧，与地面保持0.7m的安全距离，挂有接地线绝缘杆10可与接地接触板11接触连接，通过绝缘杆10与接地接触板11的接触模拟人工单相短路接地情况下可能出现的铁磁谐振。The grounding contact plate 11 is electrically connected to the high-voltage side of the step-up transformer 1, and keeps a safe distance of 0.7m from the ground. The insulating rod 10 is connected with the grounding contact plate 11 by hanging the grounding wire, and the contact between the insulating rod 10 and the grounding contact plate 11 Simulate the ferromagnetic resonance that may occur in the case of artificial single-phase short-circuit to ground.
一次消谐装置8与电压互感器6的N端电连接，二次消谐装置7与高速录波仪13的电压输入端并联连接于电压互感器6二次侧开口三角，接地短路产生的零序电压通过电压互感器6二次侧开口三角进行检测，并由高速录波仪13进行实时显示与记录，通过投切一次消谐装置8或者二次消谐装置7，验证不同情况下消谐措施的应用效果并且对不同的消谐装置进行评测。The primary harmonic elimination device 8 is electrically connected to the N terminal of the voltage transformer 6, and the secondary harmonic elimination device 7 is connected in parallel with the voltage input terminal of the high-speed wave recorder 13 to the open triangle on the secondary side of the voltage transformer 6, and the zero generated by the grounding short circuit The sequence voltage is detected by the opening triangle on the secondary side of the voltage transformer 6, and is displayed and recorded in real time by the high-speed wave recorder 13. By switching the primary harmonic elimination device 8 or the secondary harmonic elimination device 7, it is verified that the harmonic elimination under different conditions The application effect of the measures and the evaluation of different harmonic elimination devices.
本实用新型实施例提供的一种铁磁谐振检测及防治综合试验平台具体实验如下：The specific experiment of a ferromagnetic resonance detection and prevention comprehensive test platform provided by the embodiment of the utility model is as follows:
1、不投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6和电容器9；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；1. Without putting in the arc suppressing coil complete set device 2, close the main circuit switch to electrify the whole experimental platform; put in the voltage transformer 6 and capacitor 9; briefly contact the insulating rod 10 with the grounding contact plate 11 for 0.2s and then pull open;
2、不投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6、电容器9和一次消谐装置8；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；2. Without putting in the arc suppression coil complete set 2, close the main circuit switch to electrify the whole experimental platform; put in the voltage transformer 6, capacitor 9 and primary harmonic elimination device 8; connect the insulating rod 10 to the grounding contact plate 11 After a brief contact for 0.2s, pull it away;
3、不投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6、电容器9和二次消谐装置7；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；3. Without putting in the arc suppression coil complete set device 2, close the main circuit switch to electrify the whole experimental platform; put in the voltage transformer 6, capacitor 9 and secondary harmonic elimination device 7; connect the insulating rod 10 to the grounding contact plate 11 After a brief contact for 0.2s, pull it away;
4、投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6和电容器9；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；4. When the arc suppressing coil complete set device 2 is put into use, close the main circuit switch to electrify the whole experimental platform; put in the voltage transformer 6 and capacitor 9; briefly contact the insulating rod 10 with the grounding contact plate 11 for 0.2s and then pull it away ;
5、投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6、电容器9和一次消谐装置8；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；5. When the arc suppression coil complete set device 2 is put into operation, close the main circuit switch to electrify the whole experimental platform; put in the voltage transformer 6, capacitor 9 and primary harmonic elimination device 8; connect the insulating rod 10 and the grounding contact plate 11 briefly After contacting for 0.2s, pull it away;
6、投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6、电容器9和二次消谐装置7；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；6. When the arc suppression coil complete set device 2 is put into operation, close the main circuit switch to electrify the entire experimental platform; put in the voltage transformer 6, capacitor 9 and secondary harmonic elimination device 7; connect the insulating rod 10 to the grounding contact plate 11 After a brief contact for 0.2s, pull it away;
7、更换不同电容值的电容器重复实验1-6；7. Repeat experiments 1-6 by replacing capacitors with different capacitance values;
8、更换一次消谐装置8重复实验1-6；8. Replace the harmonic elimination device once and repeat experiments 1-6;
9、更换二次消谐装置7重复实验1-6。9. Replace the secondary harmonic elimination device 7 and repeat experiments 1-6.
通过实验1可以模拟当中性点不接地时，接地短路情况下可能出现的铁磁谐振现象，并由高速录波仪13实时显示并记录零序电流值和零序电压值。Experiment 1 can simulate the ferromagnetic resonance phenomenon that may occur in the case of a ground short circuit when the neutral point is not grounded, and the high-speed wave recorder 13 displays and records the zero-sequence current and zero-sequence voltage values in real time.
通过实验2可以对实验1中可能出现的铁磁谐振，以投入一次消谐装置8的方式进行消谐处理，并由高速录波仪13实时显示并记录零序电流值和零序电压值，对比实验1和实验2中高速录波仪13显示的零序电流值和零序电压值验证与评测一次消谐装置8的消谐效果。Through Experiment 2, the ferromagnetic resonance that may occur in Experiment 1 can be eliminated by putting in the primary harmonic elimination device 8, and the high-speed wave recorder 13 displays and records the zero-sequence current value and zero-sequence voltage value in real time. Compare the zero-sequence current and zero-sequence voltage values displayed by the high-speed wave recorder 13 in Experiment 1 and Experiment 2 to verify and evaluate the harmonic elimination effect of the primary harmonic elimination device 8 .
通过实验3可以对实验1中可能出现的铁磁谐振，以投入二次消谐装置7的方式进行消谐处理，并由高速录波仪13实时显示并记录零序电流值和零序电压值，对比实验1和实验3中高速录波仪13显示的零序电流值和零序电压值验证与评测二次消谐装置7的消谐效果。Through Experiment 3, the ferromagnetic resonance that may appear in Experiment 1 can be eliminated by putting in the second harmonic elimination device 7, and the high-speed wave recorder 13 will display and record the zero-sequence current value and zero-sequence voltage value in real time , comparing the zero-sequence current value and zero-sequence voltage value displayed by the high-speed wave recorder 13 in Experiment 1 and Experiment 3 to verify and evaluate the harmonic elimination effect of the secondary harmonic elimination device 7 .
通过实验4可以模拟当中性点经消弧线圈接地时，接地短路情况下可能出现的铁磁谐振现象，并由高速录波仪13实时显示并记录零序电流值和零序电压值，对比实验1和实验4中高速录波仪13显示的零序电流值和零序电压值判断两种中性点接地方式下铁磁谐振现象的强弱程度。Experiment 4 can simulate the ferromagnetic resonance phenomenon that may occur in the case of a ground short circuit when the neutral point is grounded through the arc suppressing coil, and the high-speed wave recorder 13 displays and records the zero-sequence current value and zero-sequence voltage value in real time. Comparative experiment The zero-sequence current value and zero-sequence voltage value displayed by the high-speed wave recorder 13 in Experiment 1 and Experiment 4 judge the strength of the ferromagnetic resonance phenomenon under the two neutral point grounding methods.
通过实验5可以对实验4中可能出现的铁磁谐振，以投入一次消谐装置8的方式进行消谐处理，并由高速录波仪13实时显示并记录零序电流值和零序电压值，对比实验4和实验5中高速录波仪13显示的零序电流值和零序电压值验证与评测一次消谐装置8的消谐效果。Through Experiment 5, the ferromagnetic resonance that may occur in Experiment 4 can be eliminated by putting in the primary harmonic elimination device 8, and the high-speed wave recorder 13 displays and records the zero-sequence current value and zero-sequence voltage value in real time. Compare the zero-sequence current and zero-sequence voltage values displayed by the high-speed wave recorder 13 in Experiment 4 and Experiment 5 to verify and evaluate the harmonic elimination effect of the primary harmonic elimination device 8 .
通过实验6可以对实验4中可能出现的铁磁谐振，以投入二次消谐装置7的方式进行消谐处理，并由高速录波仪13实时显示并记录零序电流值和零序电压值，对比实验4和实验6中高速录波仪13显示的零序电流值和零序电压值验证与评测二次消谐装置7的消谐效果。Through experiment 6, the ferromagnetic resonance that may appear in experiment 4 can be eliminated by putting in the second harmonic elimination device 7, and the high-speed wave recorder 13 will display and record the zero-sequence current value and zero-sequence voltage value in real time , comparing the zero-sequence current value and zero-sequence voltage value displayed by the high-speed wave recorder 13 in Experiment 4 and Experiment 6 to verify and evaluate the harmonic elimination effect of the secondary harmonic elimination device 7 .
通过实验7-9改变铁磁谐振检测及防治综合试验平台的实验参数，对铁磁谐振发生的条件和谐振装置的消谐效果进行更全面的判断和分析。By changing the experimental parameters of the ferromagnetic resonance detection and prevention comprehensive test platform through experiments 7-9, a more comprehensive judgment and analysis can be made on the conditions of ferromagnetic resonance and the harmonic elimination effect of the resonance device.
实施例二Embodiment two
参见图2，为本实用新型实施例提供的另一种铁磁谐振检测及防治综合试验平台的结构示意图，如图2所示，所述铁磁谐振检测及防治综合试验平台包括三相电源、升压变压器1、消弧线圈成套装置2、电流互感器5、电压互感器6、二次消谐装置7、一次消谐装置8、电容器9、绝缘杆10、接地接触板11、高速录波仪13、避雷器3、熔断器4、电气控制箱12和高压探头14，其中：Referring to Fig. 2, it is a schematic structural diagram of another ferromagnetic resonance detection and prevention comprehensive test platform provided by the embodiment of the present invention. As shown in Fig. 2, the ferromagnetic resonance detection and prevention comprehensive test platform includes a three-phase power supply, Step-up transformer 1, arc suppression coil complete set 2, current transformer 5, voltage transformer 6, secondary harmonic elimination device 7, primary harmonic elimination device 8, capacitor 9, insulating rod 10, grounding contact plate 11, high-speed wave recording instrument 13, lightning arrester 3, fuse 4, electrical control box 12 and high voltage probe 14, wherein:
在试验平台的实际应用中一般选择400V交流三相电源，升压变压器1的低压侧与三相电源电连接，将升压变压器1的高压侧中性点通过消弧线圈成套装置2接地，通过投切消弧线圈成套装置2真实模拟我国配电网普遍采用的中性点经过消弧线圈接地和中性点不接地这两种接地方式；In the actual application of the test platform, a 400V AC three-phase power supply is generally selected, and the low-voltage side of the step-up transformer 1 is electrically connected to the three-phase power supply. Switching arc suppressing coil complete set 2 truly simulates the two grounding methods commonly used in my country's distribution network, the neutral point is grounded through the arc suppressing coil and the neutral point is not grounded;
避雷器3、电流互感器5、电容器9和接地接触板11均并联连接于升压变压器1的高压侧，避雷器3的一端与升压变压器1高压侧电连接，另一端接地，避雷器3的使用一方面可以吸收电力系统内部的过电压，保护设备的绝缘，另一方面组织系统外部过电压对系统绝缘的损害，在试验平台的实际应用中可以选择氧化锌避雷器，氧化锌避雷器是电力系统目前实际运行效果最好的避雷器。Arrester 3, current transformer 5, capacitor 9 and grounding contact plate 11 are all connected in parallel to the high voltage side of step-up transformer 1, one end of arrester 3 is electrically connected to the high-voltage side of step-up transformer 1, and the other end is grounded. On the one hand, it can absorb the overvoltage inside the power system and protect the insulation of the equipment. On the other hand, it can prevent the damage to the system insulation caused by the external overvoltage of the system. In the actual application of the test platform, the zinc oxide arrester can be selected. The zinc oxide arrester is the current practical power system. The lightning arrester that works best.
电流互感器5的一次侧分别与升压变压器1高压侧和电压互感器6的一次侧电连接，电流互感器5的二次侧与高速录波仪13的电流输入端电连接，接地短路产生的流过电压互感器6的零序电流通过电流互感器5进行检测，并由高速录波仪13进行实时显示与记录。The primary side of the current transformer 5 is electrically connected to the high-voltage side of the step-up transformer 1 and the primary side of the voltage transformer 6 respectively, and the secondary side of the current transformer 5 is electrically connected to the current input terminal of the high-speed wave recorder 13, and a grounding short circuit occurs The zero-sequence current flowing through the voltage transformer 6 is detected by the current transformer 5, and is displayed and recorded by the high-speed oscilloscope 13 in real time.
电容器9的一端电连接至升压变压器1高压侧，电容器9的另一端接地，通过更换不同电容值的电容器9，更为全面的探讨铁磁谐振的发生条件、影响因素和防治效果。One end of the capacitor 9 is electrically connected to the high-voltage side of the step-up transformer 1, and the other end of the capacitor 9 is grounded. By replacing the capacitor 9 with different capacitance values, the occurrence conditions, influencing factors and prevention effects of ferromagnetic resonance are more comprehensively discussed.
接地接触板11电连接至升压变压器1高压侧，接地接触板11与地面保持0.7m的安全距离，挂有接地线绝缘杆10可与接地接触板11接触连接，通过绝缘杆10与接地接触板11的接触模拟人工单相短路接地情况下可能出现的铁磁谐振。The grounding contact plate 11 is electrically connected to the high-voltage side of the step-up transformer 1. The grounding contact plate 11 maintains a safe distance of 0.7m from the ground. The insulating rod 10 is hung with a grounding wire and can be connected to the grounding contact plate 11. The insulating rod 10 is in contact with the ground. The contact of the plate 11 simulates the ferromagnetic resonance that may occur in the case of an artificial single-phase short circuit to ground.
一次消谐装置8与电压互感器6的N端电连接，二次消谐装置7与高速录波仪13的电压输入端并联连接于电压互感器6二次侧开口三角，接地短路产生的零序电压通过电压互感器6二次侧开口三角进行检测，并由高速录波仪13进行实时显示与记录，通过投切一次消谐装置8或者二次消谐装置7，验证不同情况下消谐措施的应用效果并且对不同的消谐装置进行评测。The primary harmonic elimination device 8 is electrically connected to the N terminal of the voltage transformer 6, and the secondary harmonic elimination device 7 is connected in parallel with the voltage input terminal of the high-speed wave recorder 13 to the open triangle on the secondary side of the voltage transformer 6, and the zero generated by the grounding short circuit The sequence voltage is detected by the opening triangle on the secondary side of the voltage transformer 6, and is displayed and recorded in real time by the high-speed wave recorder 13. By switching the primary harmonic elimination device 8 or the secondary harmonic elimination device 7, it is verified that the harmonic elimination under different conditions The application effect of the measures and the evaluation of different harmonic elimination devices.
熔断器4串联设置于升压变压器1与电流互感器之间，熔断器4的一端与升压变压器1高压侧电连接，另一端与电流互感器5的一次侧电连接，将熔断器引入试验平台可以对电路进行保护。The fuse 4 is arranged in series between the step-up transformer 1 and the current transformer, one end of the fuse 4 is electrically connected to the high-voltage side of the step-up transformer 1, and the other end is electrically connected to the primary side of the current transformer 5, and the fuse is introduced into the test The platform can protect the circuit.
高压探头14的一端电连接至升压变压器1高压侧，另一端与高速录波仪13的电压输入端电连接，高压探头可以对线路电压进行检测，并最终通过高速录波仪13实时显示与记录。One end of the high-voltage probe 14 is electrically connected to the high-voltage side of the step-up transformer 1, and the other end is electrically connected to the voltage input end of the high-speed oscilloscope 13. The high-voltage probe can detect the line voltage, and finally display and display in real time through the high-speed oscilloscope 13. Record.
电气控制箱12具有分别控制所述三相电源、消弧线圈成套装置2、电压互感器6、一次消谐装置8、二次消谐装置7和所述电容器9投切的六个开关，使整个试验平台的操作更为简单便捷。The electrical control box 12 has six switches for respectively controlling the three-phase power supply, the arc suppression coil complete set 2, the voltage transformer 6, the primary harmonic elimination device 8, the secondary harmonic elimination device 7 and the switching of the capacitor 9, so that The operation of the whole test platform is simpler and more convenient.
本实用新型实施例提供的另一种铁磁谐振检测及防治综合试验平台具体实验如下：Another kind of ferromagnetic resonance detection and prevention comprehensive test platform provided by the embodiment of the utility model is as follows:
1、通过电气控制箱12，在不投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6和电容器9；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；1. Through the electrical control box 12, without putting in the complete arc suppression coil device 2, close the main circuit switch to make the whole experimental platform electrified; put in the voltage transformer 6 and capacitor 9; connect the insulating rod 10 to the grounding contact plate 11 After a brief contact for 0.2s, pull it away;
2、通过电气控制箱12，在不投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6、电容器9和一次消谐装置8；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；2. Through the electrical control box 12, without putting in the arc suppressing coil complete set 2, close the main circuit switch to make the whole experimental platform electrified; put in the voltage transformer 6, the capacitor 9 and the primary harmonic elimination device 8; The rod 10 is in contact with the ground contact plate 11 briefly for 0.2s and then pulled away;
3、通过电气控制箱12，在不投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6、电容器9和二次消谐装置7；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；3. Through the electrical control box 12, without putting into the arc suppressing coil complete set 2, close the main circuit switch to make the whole experimental platform electrified; put in the voltage transformer 6, the capacitor 9 and the secondary harmonic eliminating device 7; The insulating rod 10 is pulled apart after a brief contact with the grounding contact plate 11 for 0.2s;
4、通过电气控制箱12，在投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6和电容器9；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；4. Through the electrical control box 12, in the case of putting in the arc suppression coil complete set 2, close the main circuit switch to make the whole experimental platform electrified; put in the voltage transformer 6 and capacitor 9; connect the insulating rod 10 and the grounding contact plate 11 After a brief contact for 0.2s, pull it away;
5、通过电气控制箱12，在投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6、电容器9和一次消谐装置8；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；5. Through the electrical control box 12, in the case of putting in the arc suppression coil complete set 2, close the main circuit switch to make the whole experimental platform electrified; put in the voltage transformer 6, the capacitor 9 and the primary harmonic elimination device 8; put the insulating rod 10 and the grounding contact plate 11 are briefly contacted for 0.2s and then pulled away;
6、通过电气控制箱12，在投入消弧线圈成套装置2的情况下，合上主回路开关，使整个实验平台带电；投入电压互感器6、电容器9和二次消谐装置7；将绝缘杆10与接地接触板11短暂接触0.2s后拉开；6. Through the electrical control box 12, in the case of putting into the arc suppression coil complete set device 2, close the main circuit switch to make the whole experimental platform electrified; put in the voltage transformer 6, the capacitor 9 and the secondary harmonic elimination device 7; The rod 10 is in contact with the ground contact plate 11 briefly for 0.2s and then pulled away;
7、更换不同电容值的电容器重复实验1-6；7. Repeat experiments 1-6 by replacing capacitors with different capacitance values;
8、更换一次消谐装置8重复实验1-6；8. Replace the harmonic elimination device once and repeat experiments 1-6;
9、更换二次消谐装置7重复实验1-6。9. Replace the secondary harmonic elimination device 7 and repeat experiments 1-6.
通过实验1可以模拟当中性点不接地时，接地短路情况下可能出现的铁磁谐振现象，并由高速录波仪13实时显示并记录零序电流值、零序电压值和线路电压值。Experiment 1 can simulate the ferromagnetic resonance phenomenon that may occur in the case of grounding short circuit when the neutral point is not grounded, and the high-speed wave recorder 13 displays and records the zero-sequence current value, zero-sequence voltage value and line voltage value in real time.
通过实验2可以对实验1中可能出现的铁磁谐振，以投入一次消谐装置8的方式进行消谐处理，并由高速录波仪13实时显示并记录零序电流值、零序电压值和线路电压值，对比实验1和实验2中高速录波仪13显示的零序电流值、零序电压值和线路电压值验证与评测一次消谐装置8的消谐效果。Through Experiment 2, the ferromagnetic resonance that may occur in Experiment 1 can be eliminated by putting in the primary harmonic elimination device 8, and the high-speed wave recorder 13 will display and record the zero-sequence current value, zero-sequence voltage value and The line voltage value is compared with the zero-sequence current value, zero-sequence voltage value and line voltage value displayed by the high-speed wave recorder 13 in Experiment 1 and Experiment 2 to verify and evaluate the harmonic elimination effect of the primary harmonic elimination device 8 .
通过实验3可以对实验1中可能出现的铁磁谐振，以投入二次消谐装置7的方式进行消谐处理，并由高速录波仪13实时显示并记录零序电流值、零序电压值和线路电压值，对比实验1和实验3中高速录波仪13显示的零序电流值、零序电压值和线路电压值验证与评测二次消谐装置7的消谐效果。Through experiment 3, the ferromagnetic resonance that may appear in experiment 1 can be eliminated by putting in the second harmonic elimination device 7, and the high-speed wave recorder 13 will display and record the zero-sequence current value and zero-sequence voltage value in real time and the line voltage value, compared the zero-sequence current value, zero-sequence voltage value and line voltage value displayed by the high-speed wave recorder 13 in Experiment 1 and Experiment 3 to verify and evaluate the harmonic elimination effect of the secondary harmonic elimination device 7.
通过实验4可以模拟当中性点经消弧线圈接地时，接地短路情况下可能出现的铁磁谐振现象，并由高速录波仪13实时显示并记录零序电流值、零序电压值和线路电压值，对比实验1和实验4中高速录波仪13显示的零序电流值、零序电压值和线路电压值判断两种中性点接地方式下铁磁谐振现象的强弱程度。Through experiment 4, it is possible to simulate the ferromagnetic resonance phenomenon that may occur in the case of a ground short circuit when the neutral point is grounded through the arc suppression coil, and the high-speed wave recorder 13 displays and records the zero-sequence current value, zero-sequence voltage value and line voltage in real time Value, compare the zero-sequence current value, zero-sequence voltage value and line voltage value displayed by the high-speed wave recorder 13 in Experiment 1 and Experiment 4 to judge the strength of the ferromagnetic resonance phenomenon under the two neutral point grounding methods.
通过实验5可以对实验4中可能出现的铁磁谐振，以投入一次消谐装置8的方式进行消谐处理，并由高速录波仪13实时显示并记录零序电流值、零序电压值和线路电压值，对比实验4和实验5中高速录波仪13显示的零序电流值、零序电压值和线路电压值验证与评测一次消谐装置8的消谐效果。Through Experiment 5, the ferromagnetic resonance that may occur in Experiment 4 can be eliminated by putting in a resonance elimination device 8, and the high-speed wave recorder 13 will display and record the zero-sequence current value, zero-sequence voltage value and The line voltage value is compared with the zero-sequence current value, zero-sequence voltage value and line voltage value displayed by the high-speed wave recorder 13 in Experiment 4 and Experiment 5 to verify and evaluate the harmonic elimination effect of the primary harmonic elimination device 8 .
通过实验6可以对实验4中可能出现的铁磁谐振，以投入二次消谐装置7的方式进行消谐处理，并由高速录波仪13实时显示并记录零序电流值、零序电压值和线路电压值，对比实验4和实验6中高速录波仪13显示的零序电流值、和线路电压值零序电压值验证与评测二次消谐装置7的消谐效果。Through experiment 6, the ferromagnetic resonance that may appear in experiment 4 can be eliminated by putting in the second harmonic elimination device 7, and the high-speed wave recorder 13 will display and record the zero-sequence current value and zero-sequence voltage value in real time and the line voltage value, compare the zero-sequence current value displayed by the high-speed wave recorder 13 in Experiment 4 and Experiment 6, and the zero-sequence voltage value of the line voltage value to verify and evaluate the harmonic elimination effect of the secondary harmonic elimination device 7.
通过实验7-9改变铁磁谐振检测及防治综合试验平台的实验参数，对铁磁谐振发生的条件和谐振装置的消谐效果进行更全面的判断和分析。By changing the experimental parameters of the ferromagnetic resonance detection and prevention comprehensive test platform through experiments 7-9, a more comprehensive judgment and analysis can be made on the conditions of ferromagnetic resonance and the harmonic elimination effect of the resonance device.
本领域技术人员在考虑说明书及实践这里发明的实用新型后，将容易想到本实用新型的其它实施方案。本申请旨在涵盖本实用新型的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本实用新型的一般性原理并包括本实用新型未实用新型的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本实用新型的真正范围和精神由下面的权利要求指出。Other embodiments of the invention will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention herein. This application is intended to cover any variants, uses or adaptations of the utility model, which follow the general principles of the utility model and include common knowledge in the technical field of the utility model or customary technical means. The specification and examples are to be considered exemplary only, with a true scope and spirit of the invention indicated by the following claims.
应当理解的是，本实用新型并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本实用新型的范围仅由所附的权利要求来限制。It should be understood that the present invention is not limited to the precise structure which has been described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
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| CN108169630A (en) * | 2018-03-08 | 2018-06-15 | 云南电网有限责任公司电力科学研究院 | A kind of device and method of neutral point ungrounded electric network resonance on-line monitoring |
| CN108828418A (en) * | 2018-07-17 | 2018-11-16 | 云南电网有限责任公司红河供电局 | High pressure ferromagnetic resonance analogue test platform |
| CN112415318A (en) * | 2020-11-30 | 2021-02-26 | 国网冀北电力有限公司电力科学研究院 | Physical simulation platform and detection method for secondary harmonic elimination device detection |
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| CN108169630A (en) * | 2018-03-08 | 2018-06-15 | 云南电网有限责任公司电力科学研究院 | A kind of device and method of neutral point ungrounded electric network resonance on-line monitoring |
| CN108169630B (en) * | 2018-03-08 | 2023-10-20 | 云南电网有限责任公司电力科学研究院 | Device and method for on-line monitoring resonance of neutral point ungrounded power grid |
| CN108828418A (en) * | 2018-07-17 | 2018-11-16 | 云南电网有限责任公司红河供电局 | High pressure ferromagnetic resonance analogue test platform |
| CN112415318A (en) * | 2020-11-30 | 2021-02-26 | 国网冀北电力有限公司电力科学研究院 | Physical simulation platform and detection method for secondary harmonic elimination device detection |
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