WO2022116404A1

WO2022116404A1 - High-voltage frequency converter control system and method

Info

Publication number: WO2022116404A1
Application number: PCT/CN2021/078562
Authority: WO
Inventors: 岳芬妮
Original assignee: 南京创昇智能科技有限公司
Priority date: 2020-12-02
Filing date: 2021-03-02
Publication date: 2022-06-09

Abstract

A high-voltage frequency converter control system and method, belonging to the technical field of high-voltage frequency converters. The high-voltage frequency converter control system comprises a plurality of high-voltage frequency converters (100), a control module (200), a feedback module (300) and a standby frequency converter (400). The plurality of high-voltage frequency converters (100) and the standby frequency converter (400) are both electrically connected to the control module (200) and the feedback module (300), the control module (200) and the feedback module (300) are arranged in the high-voltage frequency converter (100), and a signal transmission path (500) is arranged between the high-voltage frequency converters (100) and the standby frequency converter (400). According to the designed structure, the control module (200) and the feedback module (300) are used for detecting operation statuses of the plurality of high-voltage frequency converters (100), and when one of the high-voltage frequency converters (100) fails, the control module (200) is used for controlling the standby frequency converter (400) to replace the failed high-voltage frequency converter (100), so as to continue to work.

Description

A high-voltage inverter control system and method

technical field

The invention belongs to the technical field of high-voltage frequency converters, and more particularly, relates to a high-voltage frequency converter control system and method.

Background technique

The high-voltage inverter is an electric energy control device that converts the power frequency power supply into another frequency by using the on-off function of the power semiconductor device. With the rapid development of modern power electronic technology and microelectronics technology, high-voltage and high-power variable frequency speed control devices are constantly maturing.

The high-voltage inverter works continuously during working hours, so when one of the high-voltage inverters fails, the entire system often needs to be stopped for maintenance, resulting in low efficiency.

SUMMARY OF THE INVENTION

1. The technical problem to be solved by the invention

The purpose of the present invention is to solve the existing drawbacks.

2. Technical solutions

In order to achieve the above object, the technical scheme provided by the invention is:

A high-voltage inverter control system of the present invention includes a plurality of high-voltage inverters, a control module, a feedback module and a backup inverter. The multiple high-voltage inverters and the backup inverter are all electrically connected to the control module and the feedback module. The control module The feedback module is built into the high-voltage inverter, and there is a communication channel between the high-voltage inverter and the standby inverter.

Preferably, a decoder and a buffer are provided on the signal transmission path, and both the decoder and the buffer are located in the standby frequency converter.

Preferably, the control module is electrically connected to the communication channel.

A high-voltage inverter control method, the control method includes the following contents:

S1, obtain the running status of multiple high-voltage inverters;

S2, store the operation data and working state variable information of multiple high-voltage frequency converters in the buffer;

S3, check whether the running state of the high-voltage inverter is normal, if so, go back to S1, if not, go to step S4;

S4, call the standby inverter to work;

S5, the control module controls the corresponding operating data of the damaged high-voltage inverter in the buffer zone and the working state variable information to fit into the backup data;

S6, decode the backup data to be suitable for the backup inverter;

S7, transmit the decoded backup data to the backup inverter, and control the backup inverter to work according to the backup data;

S8, the back bracket module detects the running status of multiple high-voltage frequency converters and backup frequency converters and gives corresponding feedback.

Preferably, after returning to S1 in step S3, the acquired operating states of the multiple high-voltage frequency converters are new states, the new states correspond to new operating data and new operating state variable information, and the new data stored in the buffer overwrites the old data .

Preferably, after the standby frequency converter is used for operation in the middle of step S4, the information of the abnormal high-voltage frequency converter can be switched to the working state.

Preferably, after the standby inverter operates according to the standby data in step S7, the running state data generated by the standby inverter continues to be stored in the buffer in the name of the abnormal high-voltage inverter.

Preferably, the feedback signal of the feedback module in step S8 includes positive feedback and negative feedback.

3. Beneficial effects

Adopting the technical scheme provided by the present invention, compared with the prior art, has the following beneficial effects:

(1) A high-voltage inverter control system, comprising a plurality of high-voltage inverters, a control module, a feedback module and a backup inverter, the multiple high-voltage inverters and the backup inverter are all electrically connected to the control module and the feedback module, and the control module The feedback module is built in the high-voltage inverter, and there is a communication path between the high-voltage inverter and the standby inverter. The structure of this design detects the running status of multiple high-voltage inverters through the control module and the feedback module. When one of the high-voltage inverters When the inverter fails, the control module controls the standby inverter to take over the faulty high-voltage inverter and continue to work

(2) A high-voltage inverter control method, through which the cooperative work can effectively ensure the efficiency, carry out continuous work, and also give sufficient time for maintenance.

Description of drawings

1 is a schematic structural diagram of a high-voltage inverter control system of the present invention;

FIG. 2 is a flow chart of a method of a high-voltage inverter control system of the present invention.

Description of the labels in the diagram:

100. High voltage inverter;

200. Control module;

300. Feedback module;

400. Standby inverter;

500. Information communication channel;

600, decoder;

700. Buffer.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be more fully described below with reference to the related drawings, in which several embodiments of the present invention are given, however, the present invention can be implemented in many different forms and is not limited to this The described embodiments are, rather, provided so that this disclosure will be thorough and complete.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it may be be directly connected to another element or intervening elements may be present; the terms "vertical", "horizontal", "left", "right" and similar expressions are used herein for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the present invention; the terms used herein in the description of the present invention are only used to describe specific embodiments is not intended to limit the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to FIG. 1 , a high-voltage inverter control system of this embodiment includes multiple high-voltage inverters 100 , a control module 200 , a feedback module 300 and a backup inverter 400 , and a plurality of high-voltage inverters 100 and backup inverters 400 are electrically connected with the control module 200 and the feedback module 300. The control module 200 and the feedback module 300 are built in the high-voltage inverter 100, and a communication channel 500 is provided between the high-voltage inverter 100 and the standby inverter 400. Structure, the control module 200 and the feedback module 300 detect the running status of the multiple high-voltage inverters 100, when one of the high-voltage inverters 100 fails, the control module 200 controls the backup inverter 400 to take over the faulty high-voltage inverter 100 and continue to work.

A decoder 600 and a buffer 700 are arranged on the signal transmission path 500 in this embodiment. The decoder 600 and the buffer 700 are both located in the standby frequency converter 400. The running state of 100 is transmitted to the buffer 700 through the communication path 500 for storage.

The control module 200 in this embodiment is electrically connected to the signal transmission path 500 , and the control module 200 controls the operation of the standby inverter 400 and the corresponding signal response through the signal transmission path 500 .

Example 2

Referring to Fig. 1-Fig. 2, a control method of a high-voltage frequency converter in this embodiment includes the following contents:

S1, obtaining the operating states of the plurality of high-voltage frequency converters 100;

S2, storing the operation data and working state variable information of the plurality of high-voltage frequency converters 100 in the buffer 700;

S3, check whether the running state of the high-voltage frequency converter 100 is normal, if so, go back to S1, if not, go to step S4;

S4, call the standby inverter 400 to work;

S5, the control module 200 controls the corresponding operation data and the working state variable information of the damaged high-voltage inverter 100 in the buffer 700 to fit into backup data;

S6, decoding the backup data to be suitable for the backup inverter 400;

S7, transmit the decoded backup data to the backup inverter 400, and control the backup inverter 400 to work according to the backup data;

S8, the back bracket module detects the running states of the plurality of high-voltage frequency converters 100 and the backup frequency converters 400 and performs corresponding feedback.

After returning to S1 in step S3 of this embodiment, the acquired operating states of the plurality of high-voltage frequency converters 100 are new states, the new states correspond to new operating data and new operating state variable information, and new data stored in the buffer 700 Overwrite old data.

After the standby frequency converter 400 is used for operation in the step S4 of this embodiment, the information of the abnormal high-voltage frequency converter 100 can be connected to the working state.

After the backup inverter 400 operates according to the backup data in step S7 of this embodiment, the running state data generated by the backup inverter 400 continues to be stored in the buffer 700 in the name of the abnormal high-voltage inverter 100 .

In step S8 of this embodiment, the feedback signal of the feedback module 300 includes positive feedback and negative feedback.

Obtaining the operating states of multiple high-voltage frequency converters 100 is in a periodic form, and the periodic interval is not less than 1 hour. When the feedback module 300 detects an operating failure or changes in overall performance, it will compulsorily obtain the states within the periodic interval.

The above-mentioned embodiment only expresses a certain embodiment of the present invention, and its description is more specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention; it should be pointed out that for those of ordinary skill in the art Said that, on the premise of not departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention; therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A high-voltage frequency converter control system, characterized in that it comprises a plurality of high-voltage frequency converters (100), a control module (200), a feedback module (300) and a backup frequency converter (400), the plurality of high-voltage frequency converters (100) ) and the standby frequency converter (400) are electrically connected to the control module (200) and the feedback module (300), the control module (200) and the feedback module (300) are built in the high-voltage frequency converter (100), and the A signal transmission path (500) is arranged between the high-voltage frequency converter (100) and the standby frequency converter (400).
A high-voltage inverter control system according to claim 1, characterized in that: a decoder (600) and a buffer (700) are provided on the signal transmission path (500), and the decoder (600) and The buffers (700) are all located in the standby frequency converter (400).
A high-voltage inverter control system according to claim 1, characterized in that: the control module (200) is electrically connected to the signal transmission path (500).
A control method for a high-voltage frequency converter (100), characterized in that: the control method includes the following contents:

S1, acquiring the running states of multiple high-voltage frequency converters (100);

S2, storing the operation data and working state variable information of the plurality of high-voltage frequency converters (100) in the buffer (700);

S3, check whether the running state of the high-voltage frequency converter (100) is normal, if so, return to S1, if not, go to step S4;

S4, call the standby frequency converter (400) to work;

S5, the control module (200) controls the corresponding damaged high-voltage frequency converter (100) in the buffer (700) to fit the running data and the working state variable information into backup data;

S6, decoding the spare data to be suitable for the spare frequency converter (400);

S7, transmitting the decoded backup data to the backup inverter (400), and controlling the backup inverter (400) to work according to the backup data;

S8, the back bracket module detects the running states of the plurality of high-voltage frequency converters (100) and the backup frequency converters (400) and performs corresponding feedback.
A high-voltage inverter control method according to claim 4, characterized in that: after returning to S1 in step S3, the acquired operating states of the plurality of high-voltage inverters (100) are new states, and the new states correspond to new The new data stored in the buffer (700) overwrites the old data.
A high-voltage inverter control method according to claim 4, characterized in that: after the standby inverter (400) is used in the middle point of step S4, the information of the abnormal high-voltage inverter (100) can be segmented with the Work connection status.
A high-voltage inverter control method according to claim 4, characterized in that: after the backup inverter (400) operates according to the backup data in the step S7, the running state data generated by the backup inverter (400) continues to be The name of the abnormal high voltage inverter (100) is stored in the buffer (700).
A high-voltage inverter control method according to claim 4, characterized in that: the feedback signal of the feedback module (300) in the step S8 includes positive feedback and negative feedback.