CN212435614U - Control system for 'two-in-one' of high-voltage frequency converter - Google Patents
Control system for 'two-in-one' of high-voltage frequency converter Download PDFInfo
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- CN212435614U CN212435614U CN202021136852.0U CN202021136852U CN212435614U CN 212435614 U CN212435614 U CN 212435614U CN 202021136852 U CN202021136852 U CN 202021136852U CN 212435614 U CN212435614 U CN 212435614U
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Abstract
The utility model discloses a control system of high-voltage inverter "two drag one", relates to fan control technical field. The utility model comprises a centralized control box, a high-voltage switch cabinet QF1, a high-voltage switch cabinet QF2, a frequency converter A, a frequency converter B, an output switch cabinet and a low-voltage power distribution cabinet; the frequency converter A and the frequency converter B both have a fault self-checking function; the centralized control box is respectively electrically connected with the high-voltage switch cabinet QF1, the high-voltage switch cabinet QF2, the frequency converter A, the frequency converter B, the output switch cabinet and the low-voltage power distribution cabinet; the high-voltage switch cabinet QF1 and the high-voltage switch cabinet QF2 are both connected with a 10kv power grid; the high-voltage switch cabinet QF1 is electrically connected with the frequency converter A; the high-voltage switch cabinet QF2 is electrically connected with the frequency converter B. The utility model discloses can realize the equipment switching in the short time, reduce load equipment rotational speed loss, satisfy the technology production requirement, have higher market using value.
Description
Technical Field
The utility model belongs to the technical field of fan control, especially, relate to a control system that high-voltage inverter "two drag one".
Background
With the increasing development and improvement of the variable frequency speed control technology, the variable frequency speed control technology is widely applied to large-capacity transmission mechanisms in various industries. The high-voltage frequency converter is widely applied due to the advantages of high benefit, good performance, high energy saving, wide speed regulation range and the like. The speed regulation of fans and water pumps is high, stepless speed regulation can be realized by using a high-voltage frequency converter, the process control requirement can be met, energy can be greatly saved, and the production cost is reduced. The speed is regulated by adopting the frequency converter, the load equipment is stably started, the starting current is small, the vibration is small, and the advantages are prominent.
In the field of coking, a cold blower is taken as key equipment, and the cold blower and a matched frequency converter are driven by one driving device and one standby device; if the running frequency converter fails and stops working, the crude gas can be diffused for a long time, and the environmental protection pressure is high; when the standby equipment is used, the fan is required to be accelerated to the required rotating speed from a static state step by step, the time is long, the starting preparation work is complicated, and the form can not meet the requirements of safety and environmental protection more and more. Therefore, a "two-in-one" control system for a high voltage inverter is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a control system of high-voltage inverter "two drag one", its purpose is in order to solve the problem that proposes among the above-mentioned background art.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model relates to a control system of high-voltage inverter 'two drags one', including centralized control box, high-voltage switch cabinet QF1, high-voltage switch cabinet QF2, converter A, converter B, output switch cabinet and low-voltage distribution cabinet; the centralized control box is respectively and electrically connected with the high-voltage switch cabinet QF1, the high-voltage switch cabinet QF2, the frequency converter A, the frequency converter B, the output switch cabinet and the low-voltage power distribution cabinet; the high-voltage switch cabinet QF1 and the high-voltage switch cabinet QF2 are both connected with a 10kv power grid; the high-voltage switch cabinet QF1 is electrically connected with the frequency converter A; the high-voltage switch cabinet QF2 is electrically connected with the frequency converter B; the frequency converter A and the frequency converter B both have a fault self-checking function; the output switch cabinet comprises an isolation switch QS12, an isolation switch QS22, a load switch KM12 and a load switch KM 22; the isolating switch QS12 is electrically connected with the frequency converter A and the load change-over switch KM12 respectively; the isolating switch QS22 is electrically connected with the frequency converter B and the load switch KM22 respectively; the load switch KM12 and the load switch KM22 are both electrically connected with the motor.
The utility model discloses following beneficial effect has:
the utility model discloses an utilize high-voltage inverter "two to drag one" technique, realize that high-voltage inverter switches for a short time, reduce load equipment rotational speed loss, make the converter trouble fall to minimumly to the technology influence, satisfy the technology production requirement, have higher market using value.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a control system of a high-voltage inverter "two-to-one".
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the present invention relates to a control system of a high-voltage inverter "two-to-one", which comprises a centralized control box, a high-voltage switch cabinet QF1, a high-voltage switch cabinet QF2, a frequency converter a, a frequency converter B, an output switch cabinet and a low-voltage distribution cabinet; the centralized control box is connected with the upper computer through a data transmission module; the centralized control box is respectively electrically connected with the high-voltage switch cabinet QF1, the high-voltage switch cabinet QF2, the frequency converter A, the frequency converter B, the output switch cabinet and the low-voltage power distribution cabinet;
the centralized control box is used for controlling the disconnection or the connection of the high-voltage switch cabinet QF1, the high-voltage switch cabinet QF2 and the output switch cabinet and the start or the stop of the frequency converter A and the frequency converter B, and can adjust and monitor the operating frequency of the frequency converter A and the frequency converter B; the centralized control box receives a 1-path AC220V control power supply and a 1-path AC380V three-phase four-wire cooling fan power supply of the low-voltage power distribution cabinet, distributes the control power supply and the cooling fan power supply provided by the low-voltage power distribution cabinet to a frequency converter A and a frequency converter B, and provides electric energy support for the closing action or the opening action of components such as a high-voltage switch cabinet QF1, a high-voltage switch cabinet QF2 and an output switch cabinet through the centralized control box;
the frequency converter A and the frequency converter B are both provided with a fault self-checking circuit; the fault self-checking circuit is used for carrying out power self-checking on the frequency converter A and the frequency converter B; the self-fault detection circuit is designed conventionally in the field, for example, the self-fault detection circuit in patent document with the publication number of CN106950422B can be used; the fault self-checking circuit is electrically connected with the centralized control box, when the fault self-checking circuit detects that the frequency converter A or the frequency converter B has faults, a fault signal is transmitted to the centralized control box, and the centralized control box controls the high-voltage switch cabinet QF1 and the load change-over switch KM12 or the high-voltage switch cabinet QF2 and the load change-over switch KM22 to be disconnected;
the high-voltage switch cabinet QF1 and the high-voltage switch cabinet QF2 are both connected with a 10kv power grid; the high-voltage switch cabinet QF1 is electrically connected with the frequency converter A and supplies power to the frequency converter A at high voltage; the high-voltage switch cabinet QF2 is electrically connected with the frequency converter B and supplies power to the frequency converter B at high voltage; the output switch cabinet comprises an isolation switch QS12, an isolation switch QS22, a load switch KM12 and a load switch KM 22; the isolating knife switch QS12 is electrically connected with the frequency converter A and the load change-over switch KM12 respectively; the isolating switch QS22 is electrically connected with the frequency converter B and the load switch KM22 respectively; the load switch KM12 and the load switch KM22 are electrically interlocked; the load switch KM12 and the load switch KM22 are both electrically connected with the motor; the motor is a motor of a cooling fan.
The working principle of a control system of a high-voltage frequency converter 'two-in-one' is as follows:
firstly, a high-voltage switch cabinet QF1 and a high-voltage switch cabinet QF2 are controlled to be closed through a centralized control box, and after high voltage is introduced into a frequency converter A and a frequency converter B, the frequency converter A and the frequency converter B perform fault self-checking; when no fault exists, the frequency converter A and the frequency converter B are in a standby state;
step two, after the centralized control box receives an instruction signal of an upper computer, a corresponding frequency converter is selected to be started according to the priority A/priority B of the centralized control box (taking the priority B as an example); simultaneously, closing an isolation switch QS12 and an isolation switch QS 22;
after the frequency converter B receives a centralized control box starting instruction, a load changeover switch KM22 is switched on, and the frequency converter B is started; the operation rotating speed of the frequency converter B is adjusted through the centralized control box;
step four, when the fault self-checking module detects that a fault occurs in the operation process of the frequency converter B, a fault signal is sent to the centralized control box; the centralized control box controls the high-voltage switch cabinet QF2 and the load change-over switch KM22 to be automatically disconnected; meanwhile, the centralized control box automatically sends a starting instruction to the frequency converter A and sends a fault signal to an upper computer;
step five, after the frequency converter A receives a start instruction of the centralized control box, the load switch KM12 is switched on; after the load switch KM12 is switched on for 3s, the frequency converter A operates; then, the centralized control box adjusts the operating frequency of the frequency converter A to the operating frequency of the frequency converter B when the frequency converter B has a fault, so that the frequency converter A and the frequency converter B can be switched quickly;
step six, the centralized control box disconnects the QF2 of the high-voltage switch cabinet and sends a maintenance instruction to the upper computer;
step seven, disconnecting an isolation switch QS22 to overhaul the frequency converter B;
step eight, after the frequency converter B is overhauled, closing an isolation knife switch QS22 and a high-voltage switch cabinet QF 2; carrying out fault self-checking on the frequency converter B; the frequency converter B is in a standby state after no fault exists;
and step nine, when the equipment runs, switching the frequency converter A to the frequency converter B or switching the frequency converter B to the frequency converter A through the centralized control box so as to realize the switching of the two frequency converters in the fault-free state.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (1)
1. A control system of a high-voltage frequency converter 'two-in-one' comprises a centralized control box, a high-voltage switch cabinet QF1, a high-voltage switch cabinet QF2, a frequency converter A, a frequency converter B, an output switch cabinet and a low-voltage power distribution cabinet; the method is characterized in that:
the centralized control box is respectively and electrically connected with the high-voltage switch cabinet QF1, the high-voltage switch cabinet QF2, the frequency converter A, the frequency converter B, the output switch cabinet and the low-voltage power distribution cabinet; the high-voltage switch cabinet QF1 and the high-voltage switch cabinet QF2 are both connected with a 10kv power grid; the high-voltage switch cabinet QF1 is electrically connected with the frequency converter A; the high-voltage switch cabinet QF2 is electrically connected with the frequency converter B; the frequency converter A and the frequency converter B both have a fault self-checking function;
the output switch cabinet comprises an isolation switch QS12, an isolation switch QS22, a load switch KM12 and a load switch KM 22; the isolating switch QS12 is electrically connected with the frequency converter A and the load change-over switch KM12 respectively; the isolating switch QS22 is electrically connected with the frequency converter B and the load switch KM22 respectively; the load switch KM12 and the load switch KM22 are both electrically connected with the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021136852.0U CN212435614U (en) | 2020-06-18 | 2020-06-18 | Control system for 'two-in-one' of high-voltage frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021136852.0U CN212435614U (en) | 2020-06-18 | 2020-06-18 | Control system for 'two-in-one' of high-voltage frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212435614U true CN212435614U (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021136852.0U Active CN212435614U (en) | 2020-06-18 | 2020-06-18 | Control system for 'two-in-one' of high-voltage frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212435614U (en) |
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2020
- 2020-06-18 CN CN202021136852.0U patent/CN212435614U/en active Active
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