A DCS system with multiple protection power supply systems

Abstract

This utility model discloses a multi-protection power supply system for a DCS system, relating to the field of DCS system power supply technology. It includes a first UPS, a second UPS, a main power module for the DCS system, a redundant power module for the DCS system, an isolation transformer, electrical section 1-1, electrical section 1-2, and electrical section 2. The inverter input of the first UPS is connected to electrical section 1-1, and the output of the first UPS is connected to the main power module of the DCS system. Using different transformers simultaneously supplies power to redundant power modules of a single DCS system, it eliminates the risk of DCS system power outages and process equipment malfunctions due to UPS failures or external power interruptions. It also solves the problem of continuous production interruptions caused by long-term maintenance of the electrical distribution room and DCS system power supply interruptions. By adopting a dual-unit, dual-output UPS system, with two independent UPS units forming a dual-path uninterrupted redundant power supply scheme and using an isolation transformer, a multi-protection uninterrupted power supply system for the DCS system is formed.

Description

Technical Field

[0001] This utility model relates to the field of DCS system power supply technology, and in particular to a DCS system with multiple protection power supply system. Background Technology

[0002] DCS (Distributed Control System) systems, as the core of industrial automation control, are widely used in chemical, power, and metallurgical industries. The reliability of their power supply systems directly affects the safety and continuity of the production process. Through real-time monitoring and control of field equipment, DCS systems enable process parameter adjustment, alarm handling, and production process optimization, making them a critical infrastructure for ensuring the stable operation of industrial plants. In practical applications, the power supply requirements of DCS systems typically have the following characteristics:

[0003] 1. High reliability requirements: It is necessary to avoid process loss of control, equipment damage and safety accidents caused by power outages;

[0004] 2. Continuous stability: It is necessary to maintain the continuity of power supply under scenarios such as power grid fluctuations and equipment maintenance;

[0005] 3. Anti-interference capability: External power interference must be isolated to ensure the accuracy of control signals.

[0006] Currently, the power supply solutions for DCS systems in the industry mainly include the following types: the DCS main power module and the redundant power module share a single UPS output, which is simple in structure but has the risk of single point of failure; two UPSs are connected in parallel through two mains power supplies, but if a short circuit or fault occurs in the parallel system, it may cause the main circuit breaker to trip; when the mains power is interrupted, it relies on the switching board to switch to the backup power supply, but if the switching fails or the UPS fails, it will still cause a power outage.

[0007] However, the aforementioned traditional power supply methods have significant drawbacks: a single UPS failure, parallel system malfunction, or switching board failure can all directly lead to a power outage in the DCS system, causing process equipment to malfunction and requiring emergency shutdown. When the electrical distribution room needs long-term maintenance, traditional solutions cannot guarantee DCS power supply, resulting in production interruption. They also fail to address the potential difference problem of multiple power supplies, and power interference may affect the stability of the DCS system. To address these issues, this application proposes a multi-protection power supply system for DCS systems. Through a redundant architecture of dual UPS independent power supply + isolation transformer backup power supply, it solves the problems of low power supply reliability, maintenance interruption, and weak anti-interference capability in the prior art, enabling the DCS system to operate continuously and stably under various abnormal conditions. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a multi-protection power supply system for DCS systems. It solves the problem that a single UPS failure, parallel system malfunction, or switching board failure can all directly lead to a power outage in the DCS system, causing process equipment to malfunction and requiring emergency shutdown. When the electrical distribution room needs to be inspected for a long time, traditional solutions cannot guarantee the power supply to the DCS, resulting in production interruption. It also fails to solve the potential difference problem of multiple power supplies, which may affect the stability of the DCS system due to power interference.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A multi-protection power supply system for a DCS system includes a first UPS, a second UPS, a DCS system main power module, a DCS system redundant power module, an isolation transformer, electrical section 1-1, electrical section 1-2, and electrical section 2. The inverter input of the first UPS is connected to electrical section 1-1. The output of the first UPS is connected to the DCS system main power module. The inverter input of the second UPS is connected to electrical section 1-2, and the output of the second UPS is connected to the DCS system redundant power module. Electrical sections 1-1 and 1-2 are powered by the same mains transformer. The input of the isolation transformer is connected to electrical section 2, which is powered by a different mains transformer.

[0011] Preferably, the first output of the isolation transformer is connected to the bypass input of the first UPS, the second output of the isolation transformer is connected to the bypass input of the second UPS, the third output of the isolation transformer is connected to the maintenance bypass input of the main power module of the DCS system, and the fourth output of the isolation transformer is connected to the maintenance bypass input of the redundant power module of the DCS system.

[0012] Preferably, the input of the main power supply module of the DCS system is the output of the first UPS and the third output of the isolation transformer connected in parallel, and the input of the redundant power supply module of the DCS system is the output of the second UPS and the fourth output of the isolation transformer connected in parallel.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Using different transformers (Electrical Section 1-1 and Electrical Section 1-2 come from the same transformer, while Electrical Section 2 comes from another transformer) to simultaneously power redundant power modules of a DCS system, this eliminates the risk of DCS system power outages and process equipment loss due to UPS failures or external power interruptions. It also solves the problem of continuous production interruptions caused by long-term maintenance of the electrical distribution room and DCS system power outages.

[0015] 2. By adopting a dual-output UPS system, two independent UPS units form a dual-path uninterrupted redundant power supply scheme, and an additional backup power supply is added. Using an isolation transformer, a multi-layered uninterrupted power supply system for the DCS system is formed. Attached Figure Description

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is an overall structural diagram of the present invention;

[0018] Figure 2 This is a diagram of the multi-protection power supply system of the DCS system of this utility model.

[0019] Legend: 1. First UPS; 2. Second UPS; 3. Main power module of DCS system; 4. Redundant power module of DCS system; 5. Isolation transformer. Detailed Implementation

[0020] This application provides a multi-protection power supply system for DCS systems, effectively solving the problems that a single UPS failure, parallel system anomaly, or switching board failure can directly lead to a power outage in the DCS system, causing process equipment malfunction and emergency shutdown. When the electrical distribution room needs long-term maintenance, traditional solutions cannot guarantee DCS power supply, leading to production interruption. They also fail to address the potential difference problem of multiple power supplies, which may affect the stability of the DCS system due to power interference. By using a redundant architecture of dual UPS independent power supply + isolation transformer backup power supply, the application solves the problems of low power supply reliability, maintenance interruption, and weak anti-interference capability in the prior art, enabling the DCS system to operate continuously and stably under various abnormal conditions. Example

[0021] like Figure 1 and Figure 2 As shown, the technical solution in this application embodiment effectively solves the problem that a single UPS failure, parallel system malfunction, or switching board failure can all directly lead to a power outage in the DCS system, causing process equipment malfunction and emergency shutdown. When the electrical distribution room needs long-term maintenance, traditional solutions cannot guarantee DCS power supply, resulting in production interruption. They also fail to address the potential difference problem caused by multiple power supplies, potentially affecting the stability of the DCS system due to power interference. The overall approach is as follows:

[0022] To address the problems existing in the prior art, this utility model provides a multi-protection power supply system for a DCS system, including a first UPS1, a second UPS2, a DCS system main power module 3, a DCS system redundant power module 4, an isolation transformer 5, electrical section 1-1, electrical section 1-2, and electrical section 2. The inverter input of the first UPS1 is connected to electrical section 1-1, and the output of the first UPS1 is connected to the DCS system main power module 3. The inverter input of the second UPS2 is connected to electrical section 1-2, and the output of the second UPS2 is connected to the DCS system redundant power module 4. Electrical section 1-1 and electrical section 1-2 are powered by the same mains transformer. The input terminal of transformer 5 is connected to electrical section 2, which is powered by a mains transformer. These mains transformers are not the same; electrical sections 1-1 and 1-2 are powered by the same mains transformer, while section 2 is powered by a different mains transformer used as backup power. The system uses two independent UPS units: UPS1 and UPS2, which provide two power sources to the DCS system. This section only covers the DCS system main power module 3 and the DCS system redundant power module 4. Power supply for subsequent auxiliary equipment in the DCS system can be configured accordingly. The inverter input terminal of UPS1 is connected to electrical section 1-1, with a circuit breaker K1 in between. The static bypass input terminal of the first UPS1 is connected to the first output terminal of the isolation transformer, with a circuit breaker K5 in between. The output terminal of the first UPS1 is connected to the receiving terminal of the main power module 3 of the DCS system, with a circuit breaker K3 in between. The inverter input terminal of the second UPS2 is electrically connected to electrical section 1-2, with a circuit breaker K2 in between. The static bypass input terminal of the second UPS2 is connected to the second output terminal of the isolation transformer 5, with a circuit breaker K6 in between. The output terminal of the second UPS2 is connected to the receiving terminal of the redundant power module 4 of the DCS system, with a circuit breaker K4 in between. The receiving terminal of the isolation transformer 5 is electrically connected to electrical section 2. The first output terminal of the isolation transformer 5 is connected to the first UPS1. The static bypass receiver is connected to the second output of isolation transformer 5 and the static bypass receiver of the second UPS2. The third output of isolation transformer 5 is connected to the receiver of the main power module 3 of the DCS system as a maintenance bypass. A circuit breaker K7 is set in the middle, which is normally in the open state. The fourth output of isolation transformer 5 is connected to the receiver of the redundant power module 4 of the DCS system as a maintenance bypass. A circuit breaker K8 is set in the middle, which is normally in the open state. A circuit breaker K9 is set at the input of the main power module 3 of the DCS system, which is connected in parallel with circuit breakers K3 and K7. A circuit breaker K10 is set at the input of the redundant power module 4 of the DCS system, which is connected in parallel with circuit breakers K4 and K8.

[0023] The first output of isolation transformer 5 is connected to the bypass input of the first UPS1; the second output of isolation transformer 5 is connected to the bypass input of the second UPS2; the third output of isolation transformer 5 is connected to the maintenance bypass input of the DCS system main power module 3; and the fourth output of isolation transformer 5 is connected to the maintenance bypass input of the DCS system redundant power module 4. The input of the DCS system main power module 3 is the output of the first UPS1 and the third output of isolation transformer 5 connected in parallel. The input of the DCS system redundant power module 4 is the output of the second UPS2 and the fourth output of isolation transformer 5 connected in parallel. If there is a power outage in section 1-1 or a fault in the first UPS1, the first UPS1 switches to static bypass, and is powered by the first output of isolation transformer 5, ensuring that the DCS system main power module 3 is not powered. When the first UPS1 is under maintenance, it switches to power supply from the third output of isolation transformer 5. When circuit breaker K7 is closed, circuit breaker K3 at the output terminal of the first UPS1 is disconnected, ensuring uninterrupted power supply to the main power module 3 of the DCS system. If the power supply to electrical section 1-2 is interrupted or the second UPS2 fails, the circuit switches to static bypass of the second UPS2, powered by the second output terminal of the isolation transformer 5, ensuring uninterrupted power supply to the redundant power module 4 of the DCS system. When the second UPS2 is under maintenance, power supply is switched to the fourth output terminal of the isolation transformer 5. Circuit breaker K8 at the fourth output terminal of the isolation transformer 5 is closed, and circuit breaker K4 at the output terminal of the second UPS2 is disconnected, ensuring uninterrupted power supply to the redundant power module 4 of the DCS system. When electrical sections 1-1 and 1-2, powered by the same mains transformer, require long-term maintenance, the power supply to the inverter input terminals of the first UPS1 and the second UPS2 is interrupted. In this case, both UPSs switch to static bypass, powered by the first and second output terminals of the isolation transformer 5, ensuring uninterrupted power supply to the main power module 3 and the redundant power module 4 of the DCS system.

[0024] Working principle:

[0025] Electrical Section 1-1 and Electrical Section 1-2 are powered by the same mains transformer, while Electrical Section 2 is powered by a separate mains transformer as backup power. The system utilizes two independent UPS units: UPS1 and UPS2 provide dual power to the DCS system. This section only covers the DCS system main power module 3 and the DCS system redundant power module 4. Power supply for subsequent auxiliary equipment in the DCS system can be configured accordingly. The inverter input of UPS1 is connected to Electrical Section 1-1, with a circuit breaker K1 in between. The static bypass input of UPS1 is connected to the isolation transformer... The output terminals of the first UPS1 are connected to the receiving terminal of the DCS system main power module 3, with a circuit breaker K5 in between. The output terminal of the second UPS2 is connected to the electrical section 1-2, with a circuit breaker K2 in between. The static bypass input terminal of the second UPS2 is connected to the second output terminal of the isolation transformer 5, with a circuit breaker K6 in between. The output terminal of the second UPS2 is connected to the receiving terminal of the DCS system redundant power module 4, with a circuit breaker K4 in between. The receiving terminal of the isolation transformer 5 is connected to the electrical section 2. The first output terminal of the isolation transformer 5 is connected to the static bypass input terminal of the first UPS1. The second output of isolation transformer 5 is connected to the static bypass receiver of the second UPS2. The third output of isolation transformer 5 is connected to the main power module 3 of the DCS system as a maintenance bypass, with a circuit breaker K7 in between, which is normally open. The fourth output of isolation transformer 5 is connected to the redundant power module 4 of the DCS system as a maintenance bypass, with a circuit breaker K8 in between, which is normally open. A circuit breaker K9 is set at the input of the main power module 3 of the DCS system, connected in parallel with circuit breakers K3 and K7. A circuit breaker K9 is set at the input of the redundant power module 4 of the DCS system. When circuit breaker K10 is connected in parallel with circuit breakers K4 and K8, if there is a power outage in electrical section 1-1 or a fault in the first UPS1, the first UPS1 will switch to static bypass, powered by the first output of isolation transformer 5, ensuring uninterrupted power supply to the main power module 3 of the DCS system. If the first UPS1 is under maintenance, power will be switched to the third output of isolation transformer 5. This is achieved by closing circuit breaker K7 at the third output of isolation transformer 5 and disconnecting circuit breaker K3 at the output of the first UPS1, ensuring uninterrupted power supply to the main power module 3 of the DCS system. If there is a power outage in electrical section 1-2 or a fault in the second UPS2, the circuit will switch to static bypass for the second UPS2.Power is supplied from the second output terminal of isolation transformer 5, ensuring uninterrupted power supply to the DCS system redundant power module 4. When the second UPS2 needs maintenance, power is switched to the fourth output terminal of isolation transformer 5. This is achieved by closing circuit breaker K8 at the fourth output terminal of isolation transformer 5 and disconnecting circuit breaker K4 at the output terminal of the second UPS2, thus ensuring uninterrupted power supply to the DCS system redundant power module 4. If electrical sections 1-1 and 1-2, powered by the same mains transformer, require prolonged maintenance, the inverter input power to the first UPS1 and second UPS2 will be interrupted. In this case, both UPS systems will switch to static bypass, powered by the first and second output terminals of isolation transformer 5, ensuring uninterrupted power supply to the DCS system main power module 3 and the DCS system redundant power module 4.

[0026] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A multi-protection power supply system for a DCS system, characterized in that, It includes a first UPS (1), a second UPS (2), a DCS system main power module (3), a DCS system redundant power module (4), an isolation transformer (5), electrical section 1-1, electrical section 1-2 and electrical section 2; the inverter input of the first UPS (1) is connected to electrical section 1-1, and the output of the first UPS (1) is connected to the DCS system main power module (3); The inverter input of the second UPS (2) is connected to the electrical section 1-2, and the output of the second UPS (2) is connected to the redundant power supply module (4) of the DCS system. The electrical section 1-1 and the electrical section 1-2 are powered by the same mains transformer.

2. The DCS system with multiple protection power supply system as described in claim 1, characterized in that: The input terminal of the isolation transformer (5) is connected to the electrical section 2, which is powered by the mains transformer; Among them, the mains transformers are not the same mains transformer.

3. The DCS system with multiple protection power supply system as described in claim 1, characterized in that: The first output of the isolation transformer (5) is connected to the bypass input of the first UPS (1); The second output of the isolation transformer (5) is connected to the bypass input of the second UPS (2).

4. The DCS system with multiple protection power supply system as described in claim 1, characterized in that: The third output of the isolation transformer (5) is connected to the maintenance bypass input of the DCS system main power module (3); The fourth output of the isolation transformer (5) is connected to the maintenance bypass input of the redundant power supply module (4) of the DCS system.

5. A DCS system with multiple protection power supply system as described in claim 1, characterized in that: The input of the DCS system main power module (3) is the output of the first UPS (1) and the third output of the isolation transformer (5) connected in parallel.

6. A DCS system with multiple protection power supply system as described in claim 1, characterized in that: The input of the redundant power supply module (4) of the DCS system is the output of the second UPS (2) and the fourth output of the isolation transformer (5) connected in parallel.

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