阅读说明：本技术 一种组合式电子互感器暂态传变性能检测系统及方法 (System and method for detecting transient transmission performance of combined electronic transformer ) 是由 王若兰 李江涛 赵政 何双 田星辰 梅家葆 戴志锋 徐凯宏 于 2021-08-30 设计创作，主要内容包括：本发明公开了一种组合式电子互感器暂态传变性能检测系统及方法,高压宽频脉冲发生器的负极端与固定于组合式电子互感器的穿心导杆一端连接,穿心导杆的另一端连接负载的一端,负载的另一端连接高压宽频脉冲发生器的正极端,信号采集装置与组合式电子互感器的二次信号输出端连接,用于采集组合式电子互感器的二次输出信号,利用高压宽频脉冲发生器产生的陡前沿脉冲与负载相连形成一次回路,通过电磁感应接入回路,测量高压宽频脉冲,通过对二次输出信号与原始信号的对比分析得到组合式电子互感器的暂态传变性能,能够同时实现电压电流信号暂态性能的检测,电源部分只需一台高压宽频脉冲发生器,负载部分灵活可调,且操作简单,灵活可调、造价低。(The invention discloses a system and a method for detecting transient transmission performance of a combined electronic transformer, wherein the negative end of a high-voltage broadband pulse generator is connected with one end of a through guide rod fixed on the combined electronic transformer, the other end of the through guide rod is connected with one end of a load, the other end of the load is connected with the positive end of the high-voltage broadband pulse generator, a signal acquisition device is connected with the secondary signal output end of the combined electronic transformer and is used for acquiring the secondary output signal of the combined electronic transformer, a steep front edge pulse generated by the high-voltage broadband pulse generator is connected with the load to form a primary loop, the high-voltage broadband pulse is connected into the loop through electromagnetic induction to measure the high-voltage broadband pulse, the transient transmission performance of the combined electronic transformer is obtained through contrastive analysis of the secondary output signal and an original signal, and the detection of the transient transmission performance of a voltage and current signal can be simultaneously realized, the power part only needs one high-voltage broadband pulse generator, the load part is flexible and adjustable, and the operation is simple, flexible and adjustable, and the manufacturing cost is low.)

1. The utility model provides a modular electronic transformer transient state passes and becomes performance detecting system which characterized in that, includes high-pressure wide band pulse generator, load, cross-core guide arm and signal acquisition device, high-pressure wide band pulse generator's negative pole end and the cross-core guide arm one end that is fixed in modular electronic transformer are connected, the one end of load is connected to the other end of cross-core guide arm, the positive terminal of high-pressure wide band pulse generator is connected to the other end of load, signal acquisition device is connected with modular electronic transformer's secondary signal output for gather modular electronic transformer's secondary output signal.

2. The transient state transition performance detection system of the combined electronic transformer according to claim 1, wherein the circuit of the high-voltage broadband pulse generator comprises a resistor R1, a controllable trigger switch S1, a capacitor C1, a resistor R2, a resistor R3, a capacitor C2, a sharpening switch S2, a capacitor C3, a capacitor C4, a resistor R4 and a power supply DC, one end of the resistor R1 is connected with the positive pole of the power supply DC, and the other end of the resistor R1 is connected with one end of the capacitor C1 and the anode of the controllable trigger switch S1; the cathode of the controllable trigger switch S1 is connected with the DC cathode of the power supply, one end of the resistor R3, one end of the capacitor C2, one end of the resistor R4 and one end of the capacitor C4 and then grounded; the positive pole of the controllable trigger switch S1 is connected with the switch controller; the other end of the capacitor C1 is connected with the other end of the resistor R3 and one end of the resistor R2, the other end of the resistor R2 is connected with the other end of the capacitor C2 and one end of the sharpening switch S2, and the other end of the sharpening switch S2 is connected with one end of the capacitor C3 to serve as a positive end; the other end of the capacitor C3, the other end of the capacitor C4, and the other end of the resistor R4 are connected to each other to serve as a negative terminal.

3. The system for detecting the transient transduction property of a combined electronic transformer according to claim 1, wherein the controllable trigger switch S1 is a jet plasma trigger switch.

4. The system for detecting the transient transformation performance of a combined electronic transformer according to claim 1, wherein the sharpening switch S2 is a gas switch.

5. The system for detecting the transient state transduction performance of a combined electronic transformer as claimed in claim 1, wherein the combined electronic transformer comprises an insulating casing K1, a voltage current sensor T1, a voltage current output line L3 and a secondary signal output line L4, a radial through hole is formed in the insulating casing K1, and a feed-through guide rod D1 is fixed in the radial through hole.

6. The system for detecting the transient state transduction performance of a combined electronic transformer according to claim 1, wherein the feed-through guide rod D1 is a red copper guide rod.

7. A method for detecting transient transmission performance of a combined electronic transformer based on the detection system of claim 1, comprising the steps of:

s1, generating high-amplitude and steep-wave pulses on the primary side of the combined electronic transformer through a high-voltage broadband pulse generator;

s2, measuring the pulse on the secondary side of the combined electronic transformer by using a signal acquisition device after the pulse passes through the sensing part of the combined electronic transformer to obtain a voltage and current signal;

s3, carrying out frequency component analysis on the voltage and current signals obtained by the secondary side measurement of the combined electronic transformer; and comparing and analyzing the component analysis result with the original signal generated by the pulse generator to obtain the integral transient transmission performance of the combined electronic transformer.

8. The method for detecting the transient transmission performance of a combined electronic transformer as recited in claim 7, wherein the frequency range of the high-voltage broadband pulse generator is 50Hz to 1MHz, the rising edge of the pulse voltage is less than 500ns, the peak value of the output voltage of the final broadband pulse generator is 56kV, and the rising edge is 40 ns.

9. The method of claim 8, wherein the voltage and current signals comprise current, voltage amplitude and phase, and the current, voltage amplitude and phase are frequency analyzed by using Fourier decomposition and wavelet analysis.

10. The method of claim 8, wherein the collected voltage and current signals are compared with pulse signals generated by an original broadband high-voltage pulse source, and frequency components and signal time delays of the collected voltage and current signals are compared.

Technical Field

The invention belongs to the field of electronic transformer detection, and particularly relates to a system and a method for detecting transient transmission performance of a combined electronic transformer.

Background

Along with the construction of ubiquitous power internet of things and the great trend of primary and secondary fusion equipment, electronic transformers are continuously developed and new protection principles are continuously proposed, wherein the protection principle based on the transient quantity provides new requirements for the existing transformers of the power system, the transformers are required to have corresponding transient transmission performance, and if the transient transmission performance is not met, the protection measurement is inaccurate, and even protection misoperation or refusal action is caused. The existing test method and system aiming at the performance of the electronic transformer mainly examine the transmission performance and the anti-electromagnetic interference performance under the stable condition, and relate to the transient performance test less, the voltage and the current of the existing transient performance test method are measured by different methods, the measurement requirements of the combined electronic transformer cannot be met, the advantages of the combined transformer are utilized to the maximum extent, the steps are complicated, the related hardware devices are numerous and are difficult to unify, and inconvenience is brought to the transient performance test of the electronic transformer.

Disclosure of Invention

The invention aims to provide a system and a method for detecting transient transmission performance of a combined electronic transformer, so as to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a modular electronic transformer transient state passes and becomes performance detecting system, includes high-pressure wide band pulse generator, load, guide arm and signal acquisition device, high-pressure wide band pulse generator's negative pole end and the guide arm one end of punching that is fixed in modular electronic transformer are connected, the one end of load is connected to the other end of guide arm of punching, the positive terminal of high-pressure wide band pulse generator is connected to the other end of load, signal acquisition device is connected with modular electronic transformer's secondary signal output for gather modular electronic transformer's secondary output signal.

Furthermore, the circuit of the high-voltage broadband pulse generator comprises a resistor R1, a controllable trigger switch S1, a capacitor C1, a resistor R2, a resistor R3, a capacitor C2, a sharpening switch S2, a capacitor C3, a capacitor C4, a resistor R4 and a power supply DC, wherein one end of the resistor R1 is connected with the positive pole of the power supply DC, and the other end of the resistor R1 is connected with one end of the capacitor C1 and the anode of the controllable trigger switch S1; the cathode of the controllable trigger switch S1 is connected with the DC cathode of the power supply, one end of the resistor R3, one end of the capacitor C2, one end of the resistor R4 and one end of the capacitor C4 and then grounded; the positive pole of the controllable trigger switch S1 is connected with the switch controller; the other end of the capacitor C1 is connected with the other end of the resistor R3 and one end of the resistor R2, the other end of the resistor R2 is connected with the other end of the capacitor C2 and one end of the sharpening switch S2, and the other end of the sharpening switch S2 is connected with one end of the capacitor C3 to serve as a positive end; the other end of the capacitor C3, the other end of the capacitor C4, and the other end of the resistor R4 are connected to each other to serve as a negative terminal.

Further, the controllable trigger switch S1 is a jet plasma trigger switch.

Further, the sharpening switch S2 is a gas switch.

Furthermore, the combined electronic transformer comprises an insulating shell K1, a voltage and current sensor T1, a voltage and current output line L3 and a secondary signal output line L4, wherein a radial through hole is formed in the insulating shell K1, and a center-penetrating guide rod D1 is fixed in the radial through hole.

Further, the feed-through guide rod D1 is a red copper guide rod.

A method for detecting transient transmission performance of a combined electronic transformer comprises the following steps:

s1, generating high-amplitude and steep-wave pulses on the primary side of the combined electronic transformer through a high-voltage broadband pulse generator;

s2, measuring the pulse on the secondary side of the combined electronic transformer by using a signal acquisition device after the pulse passes through the sensing part of the combined electronic transformer to obtain a voltage and current signal;

s3, carrying out frequency component analysis on the voltage and current signals obtained by the secondary side measurement of the combined electronic transformer; and comparing and analyzing the component analysis result with the original signal generated by the pulse generator to obtain the integral transient transmission performance of the combined electronic transformer.

Furthermore, the frequency range of the high-voltage broadband pulse generator is 50Hz-1MHz, the rising edge of the pulse voltage is less than 500ns, the peak value of the output voltage of the broadband pulse generator is 56kV finally, and the rising edge is 40 ns.

Further, the voltage and current signals comprise current, voltage amplitude and phase, and the current, voltage amplitude and phase are subjected to frequency analysis by using Fourier decomposition and wavelet analysis.

Furthermore, the collected voltage and current signals are compared with pulse signals generated by an original broadband high-voltage pulse source, and frequency components and signal time delay in the collected voltage and current signals are compared.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention relates to a transient transmission and transformation performance detection system of a combined electronic transformer, which comprises a high-voltage broadband pulse generator, a load, a penetrating guide rod and a signal acquisition device, wherein the negative end of the high-voltage broadband pulse generator is connected with one end of the penetrating guide rod fixed on the combined electronic transformer, the other end of the penetrating guide rod is connected with one end of the load, the other end of the load is connected with the positive end of the high-voltage broadband pulse generator, the signal acquisition device is connected with the secondary signal output end of the combined electronic transformer and is used for acquiring the secondary output signal of the combined electronic transformer, a steep front edge pulse generated by the high-voltage broadband pulse generator is connected with the load to form a primary loop, the combined electronic transformer is connected into the loop through electromagnetic induction to measure the high-voltage broadband pulse, and the transient transmission and transformation performance of the combined electronic transformer is obtained through the comparative analysis of the secondary output signal and an original signal, the detection of the transient performance of the voltage and current signals can be realized simultaneously, the power supply part only needs one high-voltage broadband pulse generator, the load part is flexible and adjustable, and the detection device is simple to operate, flexible and adjustable and low in manufacturing cost.

Further, a high-voltage direct current source is adopted to charge the main capacitor through a charging resistor and a wave head adjusting resistor, and the main capacitor, the wave head adjusting resistor, a wave tail adjusting resistor, the primary energy storage capacitor and the controllable trigger switch form a primary microsecond pulse loop to generate microsecond pulse waves with adjustable wave fronts; a secondary nanosecond pulse output loop is formed by the primary energy storage capacitor, the sharpening switch, the secondary energy storage capacitor and the wave modulating resistor, and high-voltage nanosecond pulse waves are output; selecting a proper wave modulation capacitor according to the size of the load inlet capacitor, and adjusting the frequency domain distribution of the output pulse; the circuit has the advantages of large output pulse frequency spectrum range, high voltage, large voltage pulse frequency spectrum range of the head end of the converter transformer, uniform distribution, capability of controlling the output voltage amplitude value through input, capability of measuring voltage and current simultaneously, simple and convenient structure.

The invention relates to a method for detecting transient transmission performance of a combined electronic transformer.

Drawings

FIG. 1 is a circuit diagram of a high-voltage broadband pulse generator according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a combined electronic transformer in an embodiment of the invention.

Fig. 3 is a circuit diagram of measuring transient transmission performance of the combined electronic transformer according to the embodiment of the invention.

Fig. 4 is a schematic diagram of a transient transmission performance measurement system of the combined electronic transformer in the embodiment of the invention.

Fig. 5 is a schematic diagram illustrating a current sensing principle in the combined electronic transformer according to an embodiment of the present invention.

Fig. 6 is a schematic diagram illustrating a voltage sensing principle in the combined electronic transformer according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

the utility model provides a modular electronic transformer transient state passes and becomes performance detecting system, includes high-pressure wide band pulse generator, load, guide arm and signal acquisition device, high-pressure wide band pulse generator's negative pole end and the guide arm one end of punching that is fixed in modular electronic transformer are connected, the one end of load is connected to the other end of guide arm of punching, the positive terminal of high-pressure wide band pulse generator is connected to the other end of load, signal acquisition device is connected with modular electronic transformer's secondary signal output for gather modular electronic transformer's secondary output signal.

As shown in fig. 1, the circuit of the high-voltage broadband pulse generator includes a resistor R1, a controllable trigger switch S1, a capacitor C1, a resistor R2, a resistor R3, a capacitor C2, a sharpening switch S2, a capacitor C3, a capacitor C4, a resistor R4 and a power supply DC, one end of the resistor R1 is connected to the positive pole of the power supply DC, and the other end of the resistor R1 is connected to one end of the capacitor C1 and the anode of the controllable trigger switch S1; the cathode of the controllable trigger switch S1 is connected with the DC cathode of the power supply, one end of the resistor R3, one end of the capacitor C2, one end of the resistor R4 and one end of the capacitor C4 and then grounded; the positive pole of the controllable trigger switch S1 is connected with the switch controller; the other end of the capacitor C1 is connected with the other end of the resistor R3 and one end of the resistor R2, the other end of the resistor R2 is connected with the other end of the capacitor C2 and one end of the sharpening switch S2, and the other end of the sharpening switch S2 is connected with one end of the capacitor C3 to serve as a positive end; the other end of the capacitor C3, the other end of the capacitor C4, and the other end of the resistor R4 are connected to each other to serve as a negative terminal.

Specifically, the controllable trigger switch S1 is a jet plasma trigger switch; the sharpening switch S2 adopts a gas switch;

the combined electronic transformer comprises an insulating shell K1, a voltage and current sensing T1, a voltage and current output line L3 and a secondary signal output line L4, wherein a radial through hole is formed in the insulating shell K1, a feed-through guide rod D1 is fixed in the radial through hole, and the voltage and current sensing T1 adopts an LPCT coil and a capacitive voltage divider for sensing. The feed-through guide rod D1 is made of 16 x 220mm red copper.

The positive end of the high-voltage broadband pulse generator is connected with one end of a feed-through guide rod D1, and the other end of the feed-through guide rod D1 is connected with a load to form a loop; the load adopts an adjustable large resistor R. The circuit is connected with a load through a steep front pulse generated by a pulse generator with high amplitude and rich frequency content to form a primary circuit, the combined electronic transformer is connected into the circuit through electromagnetic induction to measure high-voltage broadband pulse, and the transient transmission and transformation performance of the combined electronic transformer is obtained through contrastive analysis of a secondary output signal and an original signal.

A method for detecting transient transmission performance of a combined electronic transformer comprises the following steps:

s1, generating high-amplitude and steep-wave pulses with rich frequency components on the primary side of the combined electronic transformer through the high-voltage broadband pulse generator;

the frequency range of the high-voltage broadband pulse generator is 50Hz-1MHz, the rising edge of the pulse voltage is less than 500ns, the peak value of the output voltage of the broadband pulse generator is 56kV finally, and the rising edge is 40 ns.

S2, measuring the pulse on the secondary side of the combined electronic transformer by using a signal acquisition device after the pulse passes through the sensing part of the combined electronic transformer to obtain a voltage and current signal;

as shown in fig. 5, the schematic diagram of the current sensing principle inside the combined electronic transformer, where the current sensing is a low-power coil principle, Np is a primary coil, Ns is a secondary coil, F1 is a magnetic core, Rsh is a sampling resistor, and Rb is a load resistor;

as shown in fig. 6, the principle of voltage sensing in the combined electronic transformer is schematically illustrated, and the voltage sensing is based on the principle of capacitive voltage division; c4 is the high arm capacitance and C5 is the low arm capacitance.

S3, carrying out frequency component analysis on the voltage and current signals obtained by the secondary side measurement of the combined electronic transformer;

specifically, the voltage and current signals comprise current, voltage amplitude and phase; and performing frequency analysis on the voltage and current signals acquired by the secondary side by using Fourier decomposition and wavelet analysis.

And S4, comparing and analyzing the signals with the original signals generated by the pulse generator to obtain the overall transient transmission performance of the combined electronic transformer.

And comparing the acquired voltage and current signals with pulse signals generated by an original broadband high-voltage pulse source, and comparing frequency components and signal time delay in the acquired voltage and current signals.

The transient transmission and transformation performance measuring method can be conveniently used for performance testing of the combined electronic mutual inductor, only one high-voltage broadband pulse generator is needed for a power supply part, only the switch and the capacitance resistor are formed, other complex equipment is not needed, the load part is flexibly adjustable, the transient transmission and transformation performance measuring method is a novel mutual inductor transient transmission and transformation performance measuring method, and the transient transmission and transformation performance measuring method is simple to operate, flexible and adjustable and low in manufacturing cost.