CN216929593U - Double-drive anti-shaking device based on double-eddy-current type quick circuit breaker - Google Patents

Abstract

The utility model discloses a double-drive anti-interference device based on a double-eddy current type quick breaker, which comprises a quick switching controller K electrically connected with a quick breaker S1 and a quick breaker S2, wherein the quick breaker S1 and the quick breaker S2 are respectively positioned on two power supply inlet wires connected with a bus, the quick breaker S1 is connected with a quick recognition controller K1, and the quick breaker S2 is connected with a quick recognition controller K2.

Description

Double-drive anti-shaking device based on double-eddy current type quick circuit breaker

Technical Field

The utility model relates to a high-voltage electrical technology, in particular to a double-drive anti-shaking device based on a double-eddy current type quick circuit breaker.

Background

In various large-scale heavy industrial enterprises, abnormal power failure, large voltage fluctuation and short-time power failure (commonly called as 'power shaking') caused by external power grid or internal network faults are frequent; the method is characterized in that a power failure phenomenon caused by an external fault of an enterprise is also called as an 'external grid power failure', and a bus voltage at the upper level of a branch can be rapidly reduced due to the fact that a heavy load is started on the branch inside the enterprise or a load or a circuit on the branch is in a short-circuit fault, and the fault is generally called as an 'internal power failure'; when the external network is in power failure, the bus voltage can be recovered to be normal only when the fault incoming line is switched to the standby power supply incoming line circuit; when the power failure of the internal network occurs, only the branch circuit quick breaker on the internal fault branch circuit is switched off, and the bus voltage can be recovered to be normal after the fault branch circuit is cut off; the bus voltage is lowered from the rapid speed to the voltage recovery period (namely, the time of the rapid breaker cutting off the short-circuit fault), and the enterprise power supply system is called the 'electricity dazzling time'.

The reactions of various electric loads to electricity shaking are very different; during the voltage sag and after the voltage recovery, the load with interrupted operation is called a sensitive load, and the main characteristics are as follows: including mechanical motion, including storage elements for electrical energy, magnetic energy, etc., such as motors, frequency converters, relays, contactors, etc.

When the asynchronous motor is in short-circuit fault, the magnetic field of the motor is attenuated extremely, the motor can be completely stopped due to the duration time of the power interference of hundreds of milliseconds, and the power interference resisting time of various sensitive devices is as follows: the time constant of the motor magnetic field decay is about 30 ms; when the frequency converter is in short-circuit fault, the inversion part at the rear end of the frequency converter depends on the energy stored by the internal capacitor before the power failure to continuously work for a short time, and the frequency converter is protected to stop working within 20ms under the working condition that the power supply voltage is lower than 70% of rated voltage.

At present, most of high-voltage switch cabinets are provided with mechanical quick breakers, the opening time of the mechanical quick breakers is (40-60) milliseconds, the closing time of the mechanical quick breakers is (60-80) milliseconds, the mechanical quick breakers are switched to a standby circuit or a fault branch is cut off, the complete process is completed by more than one hundred milliseconds after detection, sensitive loads are completely stopped and stopped due to electricity interference of more than one hundred milliseconds, and great production loss is caused to enterprises.

Therefore, in large industrial and mining enterprises, the research and development of a set of faster and more effective anti-interference electricity devices has become an urgent technical demand in the industry.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a dual-drive anti-sloshing apparatus based on a dual-eddy current type fast circuit breaker, so as to solve the problems in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a two anti-devices of shaking of driving based on two vortex formula quick circuit breakers, include with quick circuit breaker S1, the equal electrical connection' S of quick circuit breaker S2 fast switch over controller K, quick circuit breaker S1 and quick circuit breaker S2 are located respectively and are connected with the generating line two power advances on, are connected with quick recognition controller K1 on quick circuit breaker S1, are connected with quick recognition controller K2 on quick circuit breaker S2.

Quick recognition control ware K1 and quick recognition control ware K2 structure are the same, all include acquisition unit, filtering unit, arithmetic unit and the pulse unit that connects gradually, and acquisition unit connects the power inlet wire that corresponds quick circuit breaker place, and quick circuit breaker is connected to the pulse unit.

The fast switching controller comprises a current acquisition unit, a voltage acquisition unit, a filtering unit, an operation unit and a pulse unit, wherein the pulse unit is connected with two fast circuit breakers, the filtering unit, the operation unit and the pulse unit are sequentially connected, the current acquisition unit and the voltage acquisition unit are both connected with the filtering unit, the current acquisition unit is connected with a power inlet wire corresponding to the fast circuit breaker, and the voltage acquisition unit is electrically connected with the power inlet wire and a lower-level bus.

As a preferred embodiment of the present invention: the fast recognition controller K1, the fast recognition controller K2 and the fast switching controller K are provided with a hardware architecture integrating DSP + FPGA multiple high-speed chips.

Compared with the prior art, the utility model has the beneficial effects that:

1. the configuration scheme that the quick circuit breaker, the quick identification controller and the quick switching controller adopted in the device are fused mutually not only can solve intranet interference fault caused by subordinate bus short circuit, but also can solve extranet interference fault caused by superior inlet wire side short circuit or open circuit, and greatly enriches the comprehensive functions of the device.

2. When the subordinate branch circuit switch cabinet cannot remove the fault branch circuit due to the fact that mechanical fault of the main body is long, the device can effectively disconnect the bus incoming line where the branch circuit is located through judgment of the algorithm in the rapid recognition controller, the function of a conventional incoming line cabinet is achieved, and the investment cost of the incoming line switch cabinet is also saved in a new project.

Drawings

Fig. 1 is a schematic block diagram of the overall circuit of the present invention.

Fig. 2 is a schematic circuit diagram of the fast recognition controller of the present invention.

FIG. 3 is a schematic circuit diagram of the fast switching controller according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, in an embodiment of the present invention, a dual-drive anti-shake apparatus based on a dual-eddy current type fast breaker includes a fast switching controller K electrically connected to both the fast breaker S1 and the fast breaker S2, the fast breaker S1 and the fast breaker S2 are respectively located on two power supply incoming lines connected to a bus, the fast breaker S1 is connected to a fast recognition controller K1, and the fast breaker S2 is connected to a fast recognition controller K2.

Specifically, the rapid identification controller K1 and the rapid identification controller K2 have the same structure and respectively comprise an acquisition unit, a filtering unit, an arithmetic unit and a pulse unit which are connected in sequence, wherein the acquisition unit is connected with a power inlet wire corresponding to the rapid circuit breaker, and the pulse unit is connected with the rapid circuit breaker; the system inlet wire current is collected in real time through the collection unit, then the system current is subjected to filtering unit processing and is transmitted to the operation unit, the judgment is carried out through a fast algorithm, and after the inlet wire current is larger than a set value, a brake opening action instruction is sent to a corresponding fast breaker through the pulse unit.

When the internal bus has a short-circuit fault, as shown in the position of a point B in fig. 1, at this time, when the rapid identification controller K1 detects that the system current suddenly and rapidly increases and exceeds a setting value set inside the rapid identification controller K1, the rapid identification controller K1 immediately sends a switching-off instruction to the rapid breaker S1, the rapid breaker S1 rapidly completes switching-off, a lower-level fault bus is cut off, the voltage on the upper-level power supply inlet line 1 is rapidly recovered to be stable, and other adjacent equipment on the power supply inlet line 1 can reliably work without stopping.

The fast switching controller comprises a current acquisition unit, a voltage acquisition unit, a filtering unit, an operation unit and a pulse unit, wherein the pulse unit is connected with two fast circuit breakers, the filtering unit, the operation unit and the pulse unit are sequentially connected, the current acquisition unit and the voltage acquisition unit are both connected with the filtering unit, the current acquisition unit is connected with a power supply inlet wire corresponding to the fast circuit breaker, and the voltage acquisition unit is electrically connected with the power supply inlet wire and a lower-level bus; the two incoming lines are respectively used as a main incoming line and a standby incoming line, the fast switching controller respectively collects current and voltage values of the two incoming lines of the system through the current collection unit and the voltage collection unit, all collected information is firstly transmitted to the filtering unit for processing and then transmitted to the arithmetic unit for arithmetic processing, when the current flow direction of the incoming line changes, the short-circuit fault of the main incoming line is judged, at the moment, a switching-off instruction is sent to the fast breaker of the main incoming line, voltage and phase change on a bus are detected, when the voltage of the bus and the voltage of the standby incoming line are at a proper phase difference angle, a switching-on instruction is sent to the fast breaker of the standby incoming line, and the standby incoming line power supply supplies power to the system.

When the internal branch circuit has short-circuit fault, as shown in the position of C point in fig. 1, the branch circuit switch cabinet can cut off the fault branch circuit, if the branch circuit switch cabinet can not cut off the fault branch circuit due to long mechanical fault of the main body, the working principle of the device is the same as that of a conventional incoming line cabinet, after the quick switching controller K in the device judges and detects out, the quick switching controller K sends a switching-off instruction to the quick circuit breaker S1, the quick circuit breaker S1 quickly completes switching-off, the switching-off state is maintained, the voltage of a higher level is ensured to be recovered stably, the power supply equipment of the higher level is maintained without stopping, the problem of the fault branch circuit of the lower level is solved, and after the branch circuit switch cabinet is maintained, the quick circuit breaker S1 is closed.

Furthermore, the fast recognition controller K1, the fast recognition controller K2 and the fast switching controller K have a hardware architecture integrated by multiple high-speed chips of DSP and FPGA, the fast recognition controller mainly detects system current, the fast switching controller not only detects system current but also detects system voltage, phase, frequency and other information, and all the information are loaded with fast prejudgment algorithms, data detection, acquisition and processing can be completed within several milliseconds, and an action instruction is sent out, which is far superior to the current spare power automatic switching equipment (hundreds of milliseconds detection operation) or common fast switching equipment (tens of milliseconds detection operation), so that the sensitive load can continuously operate without shutdown in the switching process.

The quick circuit breaker S1 and the quick circuit breaker S2 are double-eddy current drive type quick circuit breakers, double-eddy current drive type quick circuit breakers are adopted in the device, an operating mechanism of the quick circuit breaker S1 and the quick circuit breaker S2 adopts a unique double-eddy current drive principle, the opening and closing speed is higher, the opening and closing process can be completed within a few milliseconds, the opening and closing speed is detected through an experiment of an authority detection mechanism in the industry, and the opening and closing speed (completed within dozens of milliseconds) of the conventional mechanical circuit breaker in the industry is greatly superior to that in the prior art. The device not only overcomes the defects that the spare power automatic switching device or the common fast switching device and the like only have a single detection instruction sending function and do not have an operation function, but also overcomes the defects that the common circuit breaker is slow in action and drags the rear leg in the complete switching process.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (4)

1. The utility model provides a two anti-devices of shaking that drive based on two eddy current type quick circuit breakers, a serial communication port, include with quick circuit breaker S1, the equal electric connection' S of quick circuit breaker S2 fast switch over controller K, quick circuit breaker S1 and quick circuit breaker S2 are located two power supply inlet wires that are connected with the generating line respectively, are connected with quick recognition controller K1 on quick circuit breaker S1, are connected with quick recognition controller K2 on quick circuit breaker S2.

2. The double-drive anti-sloshing device based on the double-eddy current type fast breaker as claimed in claim 1, wherein the fast recognition controller K1 and the fast recognition controller K2 have the same structure, and each of the devices comprises an acquisition unit, a filtering unit, an arithmetic unit and a pulse unit which are connected in sequence, the acquisition unit is connected to a power supply incoming line corresponding to the fast breaker, and the pulse unit is connected to the fast breaker.

3. The dual-drive anti-interference device based on the dual-eddy current type fast breaker as claimed in claim 1, wherein the fast switching controller comprises a current collection unit, a voltage collection unit, a filtering unit, an arithmetic unit and a pulse unit, the pulse unit connects two fast breakers, the filtering unit, the arithmetic unit and the pulse unit are connected in sequence, the current collection unit and the voltage collection unit are both connected with the filtering unit, the current collection unit is connected with a power inlet wire corresponding to the fast breaker, and the voltage collection unit is electrically connected with the power inlet wire and a lower bus.

4. The dual driving anti-sloshing apparatus based on the dual eddy current type fast breaker as claimed in claim 1, wherein said fast recognition controller K1, fast recognition controller K2 and fast switching controller K have a hardware architecture of DSP + FPGA multiple high speed chip integration.

Images