CN106711841A - Power transmission line lead sharp oscillation limiting type prevention method - Google Patents
Power transmission line lead sharp oscillation limiting type prevention method Download PDFInfo
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Abstract
本发明涉及一种输电线路导线大幅振荡限位式防治方法，包括：根据所述输电线路两端间的导线档距，在所述档距间设置拉线式装置；根据所述输电线路的舞动特点和所述拉线式装置对所述输电线路的舞动幅值进行限制；根据所述输电线路所在地区的温差变化和不同的所述档距确定所述导线调整的距离；根据所述输电线路的电压等级不同，确定所述导线的绝缘距离；根据不同所述输电线路的各相导线的分布，确定导线与所述拉线式装置连接的方式。本发明技术方案能够稳定有效的握持导线，并能够限制导线的舞动幅值。
The invention relates to a method for preventing and controlling large-scale oscillation of a transmission line conductor, which includes: according to the distance between the two ends of the transmission line, setting a pull-wire device between the distances; according to the galloping characteristics of the transmission line Limit the galloping amplitude of the transmission line with the pull-wire device; determine the adjusted distance of the conductor according to the temperature difference change in the area where the transmission line is located and the different gear distance; according to the voltage of the transmission line If the grades are different, the insulation distance of the wires is determined; according to the distribution of the wires of each phase of the different transmission lines, the way the wires are connected to the pull-wire device is determined. The technical scheme of the invention can stably and effectively hold the wire, and can limit the galloping amplitude of the wire.
Description
技术领域：Technical field:
本发明涉及输电线路防灾害领域，更具体涉及一种输电线路导线大幅振荡限位式防治方法。The invention relates to the field of disaster prevention for transmission lines, and more particularly relates to a large-scale vibration-limiting prevention and control method for conductors of transmission lines.
背景技术：Background technique:
我国电网气象灾害中，架空导线覆冰舞动是发生频率高、影响范围广、造成损失大的一种灾害形式。面对复杂的环境因素，为建设坚强国家电网、确保大电网的长期安全稳定运行，需要开展相关研究工作，建立安全、先进、经济、可靠的舞动防治机制。In the meteorological disasters of my country's power grid, the ice-coated galloping of overhead conductors is a disaster form with high frequency, wide range of influence and large losses. In the face of complex environmental factors, in order to build a strong national power grid and ensure the long-term safe and stable operation of the large power grid, it is necessary to carry out relevant research work and establish a safe, advanced, economical and reliable galloping prevention and control mechanism.
随着我国电网规模的快速发展和恶劣气象的频繁出现，进入新世纪以来，电网发生舞动事故的频率明显增加，危害程度增大，几乎每年都发生大范围的舞动事故，造成了严重的经济损失和社会影响。目前，我国输电线路中采用的防舞装置主要有相间间隔棒、线夹回转式间隔棒、线夹回转式双摆防舞器等。相间间隔棒主要用于同塔双/多回线路，线夹回转式间隔棒及双摆防舞器在单、多回线路中均有采用。由于舞动发生机理较为复杂，目前的防舞装置及防舞技术还存在应用的局限性，尤其对于档距较大的水平排列线路(目前直流线路均为水平排列方式)，各种防舞装置和防舞技术都存在一定的局限性。因此，在考虑技术可行性和经济的基础上，有必要研究新型的防舞方法，提高线路的抗舞能力，保障我国输电线路的安全稳定运行。With the rapid development of my country's power grid scale and the frequent occurrence of bad weather, since the beginning of the new century, the frequency of galloping accidents in the power grid has increased significantly, and the degree of harm has increased. Large-scale galloping accidents have occurred almost every year, causing serious economic losses. and social impact. At present, the anti-dancing devices used in my country's transmission lines mainly include phase-to-phase spacers, clamp rotary spacers, and clamp rotary double-swing anti-dance devices. Phase-to-phase spacers are mainly used for double/multi-circuit lines on the same tower, and clamp rotary spacers and double pendulum anti-dance devices are used in both single and multi-circuit lines. Due to the complex mechanism of galloping, the current anti-galling devices and anti-galling technologies still have application limitations, especially for horizontally arranged lines with large spans (current DC lines are all horizontally arranged), various anti-galling devices and There are certain limitations in anti-dance technology. Therefore, on the basis of considering technical feasibility and economy, it is necessary to study new anti-dancing methods to improve the anti-dancing ability of lines and ensure the safe and stable operation of my country's transmission lines.
发明内容：Invention content:
本发明的目的是提供一种输电线路导线大幅振荡限位式防治方法，能够稳定有效的握持导线，并能够限制导线的舞动幅值。The purpose of the present invention is to provide a method for prevention and control of large-scale vibration of transmission line conductors, which can stably and effectively hold the conductors and limit the galloping amplitude of the conductors.
为实现上述目的，本发明采用以下技术方案：一种输电线路导线大幅振荡限位式防治方法，包括：In order to achieve the above purpose, the present invention adopts the following technical solutions: a method for preventing and controlling large-scale vibration of transmission line conductors, including:
根据所述输电线路两端间的导线档距，在所述档距间设置拉线式装置；According to the wire span between the two ends of the transmission line, a pull-wire device is arranged between the spans;
根据所述输电线路的舞动特点和所述拉线式装置对所述输电线路的舞动幅值进行限制；Limiting the galloping amplitude of the transmission line according to the galloping characteristics of the transmission line and the wire-guy device;
根据所述输电线路所在地区的温差变化和不同的所述档距确定所述导线调整的距离；determining the adjusted distance of the conductors according to the temperature difference change in the area where the transmission line is located and the different spans;
根据所述输电线路的电压等级不同，确定所述导线的绝缘距离；determining the insulation distance of the conductors according to the different voltage levels of the transmission lines;
根据不同所述输电线路的各相导线的分布，确定导线与所述拉线式装置连接的方式。According to the distribution of the conductors of each phase of the different transmission lines, the manner in which the conductors are connected to the pull-wire device is determined.
所述拉线式装置包括线盘和钢丝绳；所述钢丝绳的一端缠绕在所述线盘上，所述钢丝绳的另一端连接在输电线路的绝缘子下端的U型挂环上；所述线盘通过锁止装置设置在基础上。The pull-wire device includes a wire reel and a steel wire rope; one end of the wire rope is wound on the wire reel, and the other end of the wire rope is connected to a U-shaped hanging ring at the lower end of the insulator of the transmission line; the wire reel is locked by a lock The stop device is set on the foundation.
当所述档距为300米以下时，所述拉线式装置设置在所述档距的1/2处，其拉线长度根据所述输电线路所在地区的环境确定；当所述档距为300-500米之间时，所述拉线式装置设置在所述档距的1/3处和2/3处，各处的；当所述档距为500米以上时，所述拉线式装置设置在所述档距的1/4处、1/2处和3/4处。When the span is less than 300 meters, the pull-wire device is set at 1/2 of the span, and the length of the pull-wire is determined according to the environment in the area where the transmission line is located; when the span is 300- When the distance is between 500 meters, the pull-wire device is set at 1/3 and 2/3 of the span, everywhere; when the span is more than 500 meters, the pull-wire device is set at 1/4, 1/2 and 3/4 of the gear distance.
当所述导线舞动振幅为2米时，所述拉线式装置的拉线最大张力为14.9kN，所述拉线式装置的连接部分包括锁止装置、连接金具和基础；所述连接部分的控制荷载取为20kN。When the galloping amplitude of the wire is 2 meters, the maximum tension of the guy wire of the guyed device is 14.9kN, and the connecting part of the guyed device includes a locking device, connecting fittings and foundation; the control load of the connecting part is taken as is 20kN.
所述导线的调整距离根据温度变化影响确定；所述导线的弧垂变换量为每10°弧垂变化量为0.4m。The adjustment distance of the conductor is determined according to the influence of temperature change; the sag change of the conductor is 0.4m per 10°.
当所述输电线路为单回路时，三相导线与所述拉线式装置连接的方式为：每相导线分别通过相间间隔棒与一个绝缘子连接的一端连接；每个所述绝缘子的另一端与一个所述拉线式装置的钢丝绳连接；每个所述拉线式装置的线盘通过锁止装固定于单个基础上。When the transmission line is a single circuit, the three-phase wires are connected to the pull-wire device as follows: each phase wire is connected to one end of an insulator through an interphase spacer; the other end of each insulator is connected to an insulator. The wire ropes of the guyed devices are connected; the coils of each of the guyed devices are fixed on a single foundation by a locking device.
当所述输电线路为单回路时，三相导线与所述拉线式装置连接的方式为：每相导线分别通过相间间隔棒与一个绝缘子连接的一端连接；每个所述绝缘子的另一端通过共同一个三角连板连接在一起；所述三角连板的一个顶点与所述拉线式装置的钢丝绳另一端连接；所述拉线式装置的线盘通过锁止装固定于单个基础上。When the power transmission line is a single circuit, the three-phase wires are connected to the pull-wire device in the following way: each phase wire is connected to one end of an insulator through an interphase spacer; the other end of each insulator is connected through a common A triangular connecting plate is connected together; a vertex of the triangular connecting plate is connected with the other end of the steel wire rope of the stay-wire device; the coil of the stay-wire device is fixed on a single foundation through a locking device.
当所述输电线路为双回路型式时，两回路导线分别位于输电线路的铁塔的两侧，每一侧的回路的三相导线为垂直排列，所述三相导线之间通过三个相间间隔棒牵引；最外侧的所述相间间隔棒通过绝缘子与所述拉线式装置的钢丝绳另一端连接；所述拉线式装置的线盘通过锁止装固定于单个基础上；所述拉线式装置固定于所述输电线路铁塔的下相。When the transmission line is a double-circuit type, the two-circuit conductors are respectively located on both sides of the iron tower of the transmission line, and the three-phase conductors of the loop on each side are vertically arranged, and the three-phase conductors are passed through three interphase spacers traction; the outermost interphase spacer is connected to the other end of the wire rope of the guyed device through an insulator; the wire reel of the guyed device is fixed on a single foundation through a locking device; the guyed device is fixed on the The lower phase of the transmission line tower.
所述相间间隔棒包括四分裂间隔棒；所述相间间隔棒通过钢板与绝缘子连接；所述相间间隔棒通过螺栓安装在所述钢板上的安装孔中。The interphase spacer includes four-split spacer; the interphase spacer is connected with the insulator through a steel plate; the interphase spacer is installed in the installation hole on the steel plate through a bolt.
所述相间间隔棒包括四分裂间隔棒；相邻所述相间间隔棒通过复合绝缘子连接；所述相间间隔棒通过通过钢板与复合绝缘子连接；所述相间间隔棒通过螺栓安装在所述钢板上的安装孔中。The interphase spacers include four split spacers; the adjacent interphase spacers are connected by composite insulators; the interphase spacers are connected to the composite insulators through steel plates; the interphase spacers are installed on the steel plates by bolts in the mounting hole.
和最接近的现有技术比，本发明提供技术方案具有以下优异效果Compared with the closest prior art, the technical solution provided by the present invention has the following excellent effects
1、本发明技术方案通过较小的拉线荷载即能有效抑制线路的舞动发展过程；1. The technical solution of the present invention can effectively suppress the galloping development process of the line through a small cable load;
2、本发明技术方案有效降低线路舞动幅值和能量，提高输电线路的抗舞能力，达到防舞目的；2. The technical solution of the present invention effectively reduces the galloping amplitude and energy of the line, improves the galloping resistance of the transmission line, and achieves the purpose of galloping prevention;
3、本发明技术方案保障我国输电线路的安全稳定运行；3. The technical solution of the present invention guarantees the safe and stable operation of power transmission lines in my country;
4、本发明技术方案建立安全、先进、经济、可靠的舞动防治机制。4. The technical solution of the present invention establishes a safe, advanced, economical and reliable galloping prevention and control mechanism.
附图说明Description of drawings
图1为本发明实施例单回路防舞装置布置图；Figure 1 is a layout diagram of a single-circuit anti-dancing device according to an embodiment of the present invention;
图2为本发明实施例单回路防舞装置布置图；Figure 2 is a layout diagram of a single-circuit anti-dancing device according to an embodiment of the present invention;
图3为本发明实施例双回路防舞装置布置图；Fig. 3 is a layout diagram of a double-circuit anti-dancing device according to an embodiment of the present invention;
图4为本发明实施例相间间隔棒结构示意图；Fig. 4 is a schematic diagram of the structure of interphase spacers according to an embodiment of the present invention;
图5为本发明实施例方法流程图；Fig. 5 is the flow chart of the method of the embodiment of the present invention;
1‐四分裂间隔棒，2‐复合绝缘子，3‐钢板，4‐钢丝绳，5‐线盘，6‐基础。1‐four-split spacers, 2‐composite insulators, 3‐steel plates, 4‐steel wire ropes, 5‐coils, 6‐foundation.
具体实施方式detailed description
下面结合实施例对发明作进一步的详细说明。Below in conjunction with embodiment the invention is described in further detail.
实施例1：Example 1:
本例的发明提供一种输电线路导线大幅振荡限位式防治方法，根据舞动区输电线路的特点，要求其能够实现降低舞动区输电线路舞动的机率。本专利设计的防舞方法能够满足上述需求，输电线路舞动是导线系统的风能不断积累，并最终失稳的非线性运动过程，在初始起舞阶段，能量较小，通过较小的拉线荷载即能有效抑制线路的舞动发展过程，进而有效降低线路舞动幅值和能量，提高输电线路的抗舞能力，达到防舞目的。所述方法即采用在输电线路两铁塔间根据铁塔间档距安装拉线式装置，即通过拉线式装置限制其振动幅值。首先，根据舞动区输电线路舞动特点，确定当线路舞动幅值达到多大时，对该线路进行幅值限制，即拉紧导线。同时，根据不同舞动区的天气特点，即该地区的温差变化，考虑其档距不同，确定系统调整距离的大小。第三，根据输电线路的电压等级不同，确定系统的绝缘距离。第四，根据不同输电线路各相导线的分布特点，确定系统的结构方式。The invention of this example provides a prevention and control method for large-scale vibration of transmission line conductors. According to the characteristics of transmission lines in galloping areas, it is required to reduce the probability of galloping of transmission lines in galloping areas. The anti-galling method designed in this patent can meet the above-mentioned requirements. The galloping of the transmission line is a non-linear motion process in which the wind energy of the conductor system is continuously accumulated and eventually becomes unstable. Effectively inhibit the galloping development process of the line, and then effectively reduce the amplitude and energy of the galloping line, improve the anti-galling ability of the transmission line, and achieve the purpose of anti-galling. The method is to install a guyed device between the two iron towers of the transmission line according to the span between the iron towers, that is, the vibration amplitude is limited by the guyed device. First, according to galloping characteristics of the transmission line in the galloping area, determine how high the galloping amplitude of the line is, and limit the amplitude of the line, that is, tighten the wire. At the same time, according to the weather characteristics of different dancing areas, that is, the temperature difference changes in the area, and considering the different gear distances, determine the size of the system adjustment distance. Third, according to the voltage level of the transmission line, determine the insulation distance of the system. Fourth, according to the distribution characteristics of each phase conductor of different transmission lines, determine the structure of the system.
所述拉线式装置上安装有线盘5，钢丝绳4一端缠绕在线盘5上，钢丝绳4另一端连接在绝缘子下端的U型挂环上；A wire reel 5 is installed on the pull-wire device, one end of the wire rope 4 is wound on the wire reel 5, and the other end of the wire rope 4 is connected to the U-shaped hanging ring at the lower end of the insulator;
所述拉线式装置的设置方式，如下表所示：The setting method of the pull-wire device is shown in the following table:
拉线长度需要根据实际情况进行确定，因为不同的线路所处的环境不同，有的线路可能在山区，有的在平原，有的在丘陵，以来适应导线离地高度的不同，因为不同档距，不同电压等级，不同环境下，导线对地高度不同。The length of the cable needs to be determined according to the actual situation, because the environment of different lines is different, some lines may be in mountains, some are in plains, and some are in hills, so as to adapt to the different heights of wires from the ground, because of different spans, Different voltage levels, different environments, the height of the wire to the ground is different.
当导线舞动振幅约为2米(峰峰值)时，拉线最大张力为14.9kN，考虑到安全系数，在拉线式防舞装置设计中，锁止装置、连接金具、基础等相关连接部分的控制荷载取为20kN。锁止装置包括支座、卷绕机构和加速度感应机构。其中支座是用来支撑整个装置的。卷绕机构、线盘以及加速度感应机构用同一个轴连接在一起，可以一起转动。卷绕机构用来给线盘提供转动力矩。加速度机构用来感应线盘加速度，当加速度超过设计值时，锁止转盘，不让其转动，从而拉住导线，不让其产生更严重的舞动现象。所述连接金具包括钢丝绳、U型环、延长环、间隔棒以及绝缘子(带均压环)。When the galloping amplitude of the conductor is about 2 meters (peak-to-peak value), the maximum tension of the cable is 14.9kN. Considering the safety factor, in the design of the cable-type anti-galling device, the control load of the locking device, connecting fittings, foundation and other related connection parts Take it as 20kN. The locking device includes a support, a winding mechanism and an acceleration sensing mechanism. Wherein the support is used to support the whole device. The winding mechanism, the wire reel and the acceleration sensing mechanism are connected together by the same shaft and can rotate together. The winding mechanism is used to provide rotational torque to the reel. The acceleration mechanism is used to sense the acceleration of the wire reel. When the acceleration exceeds the design value, the turntable is locked to prevent it from rotating, thereby pulling the wire and preventing it from causing more serious galloping. The connecting hardware includes a steel wire rope, a U-shaped ring, an extension ring, a spacer bar and an insulator (with a voltage equalizing ring).
考虑弧垂随温度变化影响，以档距为500m为例，冬夏气温变化为-10℃～40℃时，档距中央弧垂变化量约为2.0m。根据经验可知，每10°弧垂变化量为0.4m。Considering the influence of sag with temperature changes, taking the span of 500m as an example, when the temperature in winter and summer varies from -10°C to 40°C, the change in the central sag of the span is about 2.0m. According to experience, every 10° sag change is 0.4m.
绝缘距离是根据GB/T 311.2-2002《绝缘配合_第2部分_高压输变电设备的绝缘配合使用导则》The insulation distance is based on GB/T 311.2-2002 "Insulation Coordination_Part 2_Guidelines for the Use of Insulation Coordination of High Voltage Power Transmission and Transformation Equipment"
根据其三相水平分布的特点，三相导线分别通过锁止调节装置、绝缘装置、拉线与三角联板连接固定于单个基础6，或通过三个单独基础6固定，其连接方式如图1-图2所示。从施工方便，以及防治效果方面考虑，最终选择独立基础，如图1，每个基础6控制一根拉线的方式。According to the characteristics of the three-phase horizontal distribution, the three-phase wires are respectively connected and fixed to a single foundation 6 through a locking adjustment device, an insulation device, a pull wire and a triangular joint plate, or fixed through three separate foundations 6, and the connection method is shown in Figure 1- Figure 2 shows. Considering the convenience of construction and the effect of prevention and control, an independent foundation is finally selected, as shown in Figure 1, where each foundation 6 controls a guy wire.
(2)双回路(2) Double circuit
对于双回路型式，两回路分别位于铁塔的两侧，每一回路的三相导线为垂直排列；For the double-circuit type, the two circuits are located on both sides of the tower, and the three-phase conductors of each circuit are arranged vertically;
根据每回路其三相垂直分布的特点，三相之间通过相间间隔棒牵引，防舞拉线固定于下相，连接方式如图3所示。According to the characteristics of the vertical distribution of the three phases of each circuit, the three phases are pulled by interphase spacers, and the anti-dancing pull wires are fixed to the lower phase. The connection method is shown in Figure 3.
相间间隔棒结构型式如图4所示，其包括四分裂间隔棒1、复合绝缘子2，四分裂间隔棒本体上通过螺栓安装钢板3，钢板3上打安装孔，复合绝缘子2通过螺栓与钢板3连接。The structure of the interphase spacer is shown in Figure 4, which includes a four-split spacer 1 and a composite insulator 2. The steel plate 3 is installed on the body of the four-split spacer through bolts, and mounting holes are drilled on the steel plate 3. The composite insulator 2 is connected to the steel plate 3 by bolts. connect.
最后应当说明的是：以上实施例仅用以说明本发明的技术方案而非对其限制，所属领域的普通技术人员尽管参照上述实施例应当理解：依然可以对本发明的具体实施方式进行修改或者等同替换，这些未脱离本发明精神和范围的任何修改或者等同替换，均在申请待批的本发明的权利要求保护范围之内。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Those of ordinary skill in the art should understand with reference to the above embodiments that the specific implementation methods of the present invention can still be modified or equivalent. Replacement, any modification or equivalent replacement that does not deviate from the spirit and scope of the present invention is within the protection scope of the claims of the present invention pending application.
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| CN119093257A (en) * | 2024-11-08 | 2024-12-06 | 江东金具设备有限公司 | Overhead transmission line anti-dancing device |
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