CN111983358B - An Evaluation System for Impedance Matching Capability of Dispersion in Complex Terrain Based on Electrical Distortion - Google Patents
An Evaluation System for Impedance Matching Capability of Dispersion in Complex Terrain Based on Electrical Distortion Download PDFInfo
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Abstract
The utility model provides a complicated topography scattered current impedance matching performance evaluation system based on electric energy distortion which characterized in that evaluation system includes by survey shaft tower, survey tower grounding device, tower mountain body, side shaft tower, wireless communication module, central data processor, reference wave impulse generator, solar cell group, echo collector, reference wave impact output contact, host computer under. The method for evaluating the scattered current impedance performance of the tower and grounding device complex terrain based on electric energy distortion comprises the following steps: and the central data processor controls the reference wave impact generator to send a reference impact voltage waveform to the tower through the reference wave impact output contact, scans a feedback waveform of the echo collector, and calculates a scattered current impedance performance evaluation factor by combining the feedback waveform. And evaluating the evaluation factor to obtain the performance of the stray current impedance. The method can effectively evaluate the performance of the stray current impedance under the complex terrain, thereby realizing the engineering improvement and safety evaluation of the tower and the grounding device with electric energy distortion.
Description
Technical Field
The invention discloses a complicated terrain scattered current impedance matching performance evaluation system based on electric energy distortion, which is mainly applied to the field of lightning protection.
Background
At present, the development of power grids is very rapid, and the coordinated operation of power supply and distribution grids forms a huge power system. The lightning protection measures of the general power transmission line are to carry out current dissipation and discharge on lightning current through a tower, a grounding device and surrounding soil, so that the lightning current is prevented from hitting the power transmission line due to flashover caused by overhigh voltage of the tower top of the power transmission tower. However, in a complex mountain terrain, the current dispersion path of the power transmission line is narrower than that of a flat ground, so that the current dispersion impedance of the power transmission line is different from that of the flat terrain, and therefore the original current dispersion impedance design of the power transmission line tower and the grounding device is not suitable any more, and lightning trip accidents occur frequently. Therefore, in order to ensure the safe operation of the power transmission line in the complex terrain, the evaluation of the current dispersion impedance matching performance of the tower and the grounding device in the complex terrain is very important.
Because the design of the tower needs to consider the mechanical property and the electrical property, the impedance of the tower is often different from the ideal impedance of electricity, the impedance of the grounding device is variable due to factors such as corrosion and the like, when the impedance of the tower and the grounding device is not matched enough, the energy of the current passing through the joint of the tower and the grounding device is distorted, the distorted energy returns back to the tower top of the tower to cause flashover fault, the traditional power transmission line stray current impedance measuring equipment has high cost, complicated steps and high manpower requirement, in order to realize real-time and accurate evaluation of the matching performance of the scattered current impedance of the tower and the grounding device, the electric energy distortion waveform generated by the tower and the grounding device when the impedance is not matched can be collected, the method is used for analyzing whether the impedance matching performance of the tower and the grounding device reaches the standard or not, so that main engineering reference is provided for the laying of the power transmission line in the complex terrain and the design of the tower and the grounding device, and the safe operation and maintenance of the power transmission line are realized.
Disclosure of Invention
The invention aims to provide a complex terrain scattered current impedance matching performance evaluation system and method based on electric energy distortion.
The technical scheme for realizing the purpose of the invention comprises the following steps:
the first step is as follows: establishing a complex terrain scattered current impedance matching performance evaluation platform based on electric energy distortion, wherein the evaluation platform comprises a scattered current impedance matching performance evaluation device, a tower to be tested, a grounding device under the tower to be tested, a mountain under the tower, a side tower, a wireless communication module, a central data processor, a reference wave impact generator, a solar battery pack, an echo collector, a reference wave impact output contact and an upper computer;
the tower to be tested, the grounding device under the tower to be tested, the mountain body under the tower and the side tower are normally connected;
the wireless communication module is in cloud communication with the upper computer and reports an evaluation result;
the central data processor calculates a scattered current impedance matching performance evaluation factor by combining the feedback waveform of the echo collector and reports the scattered current impedance matching performance evaluation factor to the upper computer;
the reference wave impact generator is externally connected with a reference wave impact output contact and outputs an impact voltage reference wave to the tower top of the measured tower;
a solar cell panel is arranged outside the solar cell group to supply power for the endurance of the equipment;
the second step is that: the upper computer sends an evaluation application to the cloud end, and starts the evaluation of the free-flow impedance matching performance of the complex terrain;
the third step: the central data processor receives the application, the reference wave impact generator sends out a reference impact voltage waveform to the tower through the reference wave impact output contact, and the feedback waveform of the echo collector is scanned;
the fourth step: the central data processor combines the feedback waveform of the echo collector to calculate a scattered current impedance matching performance evaluation factor omega:
omega is a scattered current impedance matching performance evaluation factor r1Is the radius of the top of the column, r2Is the radius in the column, r3Is the radius of the column foot, h1Height of the column foot to the midpoint, h2Height from the midpoint to the tower top, H the height of the tower, UiAs an injection voltage of a reference wave impulse generator, UoFor the peak value of the feedback waveform measured by the hall voltage sensor,
extend for mountainA long line intersection angle;
the fifth step: and evaluating the impedance matching performance of the under-terrain stray current reflected by the stray current impedance matching performance evaluation factor, wherein the smaller the value of omega in a range (0, + ∞) is, the stronger the impedance matching performance of the stray current under the power transmission line configuration is, the larger the impedance matching performance is, the poorer the impedance matching performance is, if omega is in the range (0, 1), the impedance matching performance of the stray current is qualified, and if omega is in the range (1, + ∞), the impedance matching performance of the stray current is unqualified.
The invention has the beneficial effects that:
1) the impedance matching performance of the scattered current under the complex terrain can be accurately evaluated.
2) The system completes main operation and control through the upper computer, so that the system is intelligent in operation, safe and reliable and has universality.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention and the internal structure of the apparatus for evaluating the impedance matching performance of a diffuser.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. Comprises the following steps:
the first step is as follows: the method comprises the steps of establishing a complex terrain scattered current impedance matching performance evaluation platform based on electric energy distortion, wherein the evaluation platform comprises a scattered current impedance matching performance evaluation device (1), a tower to be tested (2), a grounding device under the tower to be tested (3), a mountain body under the tower (4), side towers (5), a wireless communication module (6), a central data processor (7), a reference wave impact generator (8), a solar battery pack (9), an echo collector (10), a reference wave impact output contact (11) and an upper computer (12);
the tested pole tower (2), the grounding device (3) under the tested tower, the mountain body (4) under the tower and the side pole tower (5) are normally connected;
the wireless communication module (6) is in cloud communication with the upper computer (12) and reports an evaluation result;
the central data processor (7) is connected with the operating voltage output of the reference wave impact generator (8), connected with the echo collector (10) to scan the feedback waveform to calculate the judgment factor of the scattered current impedance matching performance and reported to the upper computer (12);
the reference wave impact generator (8) is externally connected with a reference wave impact output contact (11) and outputs an impact voltage reference wave to the tower top of the measured tower (2);
the reference wave impact output contact (11) and the echo collector (10) are in combined force clasping connection with the tower top of the measured pole tower (2);
a solar cell panel is arranged outside the solar cell group (9) to supply power for the equipment during cruising;
the second step is that: an evaluator operates the upper computer (12) to send an evaluation application to the cloud, and the wireless communication module (6) receives the application and transmits the application to the central data processor (7);
the third step: the central data processor (7) receives the application, starts the scattered current impedance matching performance evaluation of the complex terrain, sends a reference impulse voltage waveform preset by equipment to the tower through a reference impulse output contact (11) by a reference impulse generator (8), starts the operation of the echo collector (10), and scans the feedback waveform of the tested tower (2) in real time;
the fourth step: the central data processor (7) combines the waveform data fed back by the echo collector (10) to calculate a scattered current impedance matching performance evaluation factor omega:
omega is a scattered current impedance matching performance evaluation factor r1Is the radius of the top of the column, r2Is the radius in the column, r3Is the radius of the column foot, h1Height of the column foot to the midpoint, h2Height from the midpoint to the tower top, H the height of the tower, UiAs an injection voltage of a reference wave impulse generator, UoFor the peak value of the feedback waveform measured by the hall voltage sensor,
is the intersection angle of the extended lines of the mountain;
the fifth step: and evaluating the impedance matching performance of the under-terrain stray current reflected by the stray current impedance matching performance evaluation factor, wherein the smaller the value of omega in a range (0, + ∞) is, the stronger the impedance matching performance of the stray current under the power transmission line configuration is, the larger the impedance matching performance is, the poorer the impedance matching performance is, if omega is in the range (0, 1), the impedance matching performance of the stray current is qualified, and if omega is in the range (1, + ∞), the impedance matching performance of the stray current is unqualified.
Claims (1)
1. A complicated terrain scattered current impedance matching performance evaluation system based on electric energy distortion is characterized in that,
the first step is as follows: the method comprises the steps of establishing a complex terrain scattered current impedance matching performance evaluation platform based on electric energy distortion, wherein the evaluation platform comprises a scattered current impedance matching performance evaluation device (1), a tower to be tested (2), a grounding device under the tower to be tested (3), a mountain body under the tower (4), side towers (5), a wireless communication module (6), a central data processor (7), a reference wave impact generator (8), a solar battery pack (9), an echo collector (10), a reference wave impact output contact (11) and an upper computer (12);
the tested pole tower (2), the grounding device (3) under the tested tower, the mountain body (4) under the tower and the side pole tower (5) are normally connected;
the wireless communication module (6) is in cloud communication with the upper computer (12) and reports an evaluation result;
the central data processor (7) calculates a scattered current impedance matching performance evaluation factor by combining the feedback waveform of the echo collector (10) and reports the scattered current impedance matching performance evaluation factor to the upper computer (12);
the reference wave impact generator (8) is externally connected with a reference wave impact output contact (11) and outputs an impact voltage reference wave to the tower top of the measured tower (2);
a solar cell panel is arranged outside the solar cell group (9) to supply power for the equipment during cruising;
the second step is that: the upper computer (12) sends an evaluation application to the cloud end, and starts the evaluation of the free-flow impedance matching performance of the complex terrain;
the third step: the central data processor (7) receives the application, and a reference wave impact generator (8) sends a reference impact voltage waveform to the tower through a reference wave impact output contact (11) and scans a feedback waveform of the echo collector (10);
the fourth step: the central data processor (7) combines the feedback waveform of the echo collector (10) to calculate a scattered current impedance matching performance evaluation factor omega:
omega is a scattered current impedance matching performance evaluation factor r1Is the radius of the top of the column, r2Is the radius in the column, r3Is the radius of the column foot, h1Height of the column foot to the midpoint, h2Height from the midpoint to the tower top, H the height of the tower, UiAs an injection voltage of a reference wave impulse generator, UoFor the peak value of the feedback waveform measured by the hall voltage sensor,
is the intersection angle of the extended lines of the mountain;
the fifth step: and evaluating the impedance matching performance of the under-terrain stray current reflected by the stray current impedance matching performance evaluation factor, wherein the smaller the value of omega in a range (0, + ∞) is, the stronger the impedance matching performance of the stray current under the power transmission line configuration is, the larger the impedance matching performance is, the poorer the impedance matching performance is, if omega is in the range (0, 1), the impedance matching performance of the stray current is qualified, and if omega is in the range (1, + ∞), the impedance matching performance of the stray current is unqualified.
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| CN112505423B (en) * | 2020-11-30 | 2022-01-21 | 广东电网有限责任公司佛山供电局 | System and method for evaluating impact impedance distortion rate of horizontal grounding electrode |
| CN112526266B (en) * | 2020-11-30 | 2022-01-21 | 广东电网有限责任公司佛山供电局 | Circuit pole tower span and grounding body impedance matching degree evaluation platform and method |
| CN112526302B (en) * | 2020-11-30 | 2022-01-21 | 广东电网有限责任公司佛山供电局 | Line overshoot tolerance characteristic test platform and evaluation method under multi-environment factors |
| CN112505424B (en) * | 2020-11-30 | 2022-01-11 | 广东电网有限责任公司佛山供电局 | System and method for evaluating impact impedance distortion rate of vertical grounding electrode |
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Effective date of registration: 20240828 Address after: 230000 B-1015, wo Yuan Garden, 81 Ganquan Road, Shushan District, Hefei, Anhui. Patentee after: HEFEI MINGLONG ELECTRONIC TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 622756 Southwest Jiaotong University, Chengdu, Sichuan Patentee before: SOUTHWEST JIAOTONG University Country or region before: China |