Electrolytic rectifier unit power supply control system

Abstract

The utility model discloses an electrolytic rectifier unit power supply control system, including two independent 1# load, 2# load, 1# rectifier, 2#A rectifier, 2#B rectifier, 3# rectifier, ZBT1 transformer, ZBT2 transformer, ZBT3 transformer, 1# rectifier is parallel with 2#A rectifier, and each half is taken to the load, is used for the power supply of 1# load, 3# rectifier is parallel with 2#B rectifier, and each half is taken to the load, is used for the power supply of 2# load, ZBT1 transformer is the power supply of 3# rectifier, ZBT2 transformer is the power supply of 2#A rectifier, 2#B rectifier simultaneously, ZBT3 transformer is the power supply of 1# rectifier. The scheme can build rectifier unit novel power supply connection circuit and its control system on the basis of not influencing existing operation rectifier unit, compares the rectifier unit power supply circuit of original, changes the connection mode of circuit under the condition of not increasing main loop cost, realizes a spare rectifier unit as the spare equipment of two different loads.

Description

Technical Field

[0001] This utility model belongs to the field of electrolytic power supply technology, specifically relating to a power supply control system for an electrolytic rectifier unit. Background Technology

[0002] Rectification, a technology that converts alternating current (AC) to direct current (DC) to power DC loads, is widely used in the manufacturing process of electrolytic products in the hydrometallurgical industry. In actual production, on-load tap-changing rectifier transformers and high-power rectifier units are combined into multi-pulse rectifier circuits to supply power to the electrolytic cells. The control system of the high-power rectifier unit mainly consists of a trigger pulse controller, PLC, touch screen, and monitoring host. In the traditional rectifier power supply mode, if the load consists of two different systems, the rectifier is used for one system and kept on standby for the other, resulting in a total of four rectifier sets. This leads to increased investment and low utilization. When two important loads originally used independent DC power supply systems with only one common backup DC power supply system, without increasing the cost of the main circuit, by changing the circuit connection method, the allocation of three or more DC power supply circuits can be rationally allocated through control algorithms to ensure that the backup unit can be put into operation when the main power supply system fails. After the improvement, each load is powered by a separate rectifier, with a backup rectifier in between, which can simultaneously serve as a backup unit for both loads, reducing investment costs by 25% and increasing utilization by 2 times. Utility Model Content

[0003] To ensure the stability of DC power supply, a new power supply mode and intelligent control system for electrolytic rectifier units are proposed. This solution can build a new power supply connection circuit and control system for rectifier units without affecting the existing operating rectifier units. Compared with the original rectifier unit power supply circuit, the connection method of the circuit is changed without increasing the cost of the main circuit, so that one standby rectifier unit can be used as a backup device for two different loads.

[0004] Therefore, the present invention adopts the following technical solution: An electrolytic rectifier power supply control system includes two independent loads, #1 and #2, rectifiers #1, #2A, #2B, and #3, and transformers ZBT1, ZBT2, and ZBT3. Rectifier #1 and rectifier #2A are connected in parallel, each supplying half of the load, to power load #1; rectifier #3 and rectifier #2B are connected in parallel, each supplying half of the load, to power load #2. Transformer ZBT1 supplies power to rectifier #1, transformer ZBT2 supplies power to rectifiers #2A and #2B, and transformer ZBT3 supplies power to rectifier #3.

[0005] This new power supply mode for the electrolysis rectifier unit proposes to transform the traditional circuit of one standby rectifier transformer driving one standby rectifier to power a single electrolysis production system as backup equipment. Instead, it proposes one standby rectifier transformer driving two standby rectifiers to power two different electrolysis production systems as backup equipment. For example... Figure 1 As shown, rectifier #1 is connected in parallel with rectifier #2A, simultaneously supplying power to load #1. Rectifier #2B is connected in parallel with rectifier #3, simultaneously supplying power to load #2. Without changing the control logic of the original rectifier unit control system, the control system can control each rectifier unit according to the DC voltage and current values ​​required by the electrolysis production system, realizing the adjustment of the rectifier units during parallel operation.

[0006] The beneficial effects of this utility model are as follows: When two critical loads originally used independent DC power supply systems with only one common backup DC power supply system, without increasing the cost of the main circuit, by changing the circuit connection method, the control system can rationally allocate the distribution of three or more DC power supply circuits to ensure that the backup unit can be put into operation when the main power supply system fails. After the improvement, each of the two loads is powered by a rectifier, with a backup rectifier in between, which can serve as a backup unit for both loads simultaneously. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the connection principle of the rectifier circuit of this utility model. Detailed Implementation

[0008] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: An electrolytic rectifier power supply control system includes two independent loads, #1 and #2, rectifiers #1, #2A, #2B, and #3, and transformers ZBT1, ZBT2, and ZBT3. Rectifier #1 and rectifier #2A are connected in parallel, each supplying half of the load, to power load #1; rectifier #3 and rectifier #2B are connected in parallel, each supplying half of the load, to power load #2; transformer ZBT1 supplies power to rectifier #1, transformer ZBT2 supplies power to both rectifier #2A and rectifier #2B, and transformer ZBT3 supplies power to rectifier #3.

[0009] Rectifier #1 and rectifier #2A serve as backups for each other under normal operating conditions, each carrying half the load; rectifier #3 and rectifier #2B serve as backups for each other under normal operating conditions, each carrying half the load, and can operate stably.

[0010] Unit #1 and Unit #2A are connected in parallel, each carrying half the load; Unit #3 and Unit #2B are connected in parallel, each carrying half the load. When Unit #1 or Unit #3 experiences a fault that causes the current to drop to zero, Unit #2A or Unit #2B can take over the load of Unit #1 or Unit #3.

[0011] Unit #1 and Unit #2A are connected in parallel, each carrying half the load; Unit #3 and Unit #2B are connected in parallel, each carrying half the load. When the DC voltage and DC current of Unit #1 and Unit #3 are inconsistent, Units #2A and #2B can stably output DC current.

[0012] The system sets rectifier #1 and rectifier #2A to general control mode; and rectifier #3 and rectifier #2B to general control mode. When any rectifier fails, the backup rectifier, under the control of the control system, smoothly takes over the current reduction caused by the fault.

Claims

1. A power supply control system for an electrolytic rectifier unit, characterized in that, It includes two independent loads, #1 and #2, rectifier #1, rectifier #2A, rectifier #2B, rectifier #3, transformer ZBT1, transformer ZBT2, and transformer ZBT3; Rectifier #1 and rectifier #2A are connected in parallel, each supplying half of the load, to power load #1; rectifier #3 and rectifier #2B are connected in parallel, each supplying half of the load, to power load #2. Transformer ZBT1 supplies power to rectifier #1, transformer ZBT2 supplies power to rectifiers #2A and #2B, and transformer ZBT3 supplies power to rectifier #3.

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