UPS power supply selection system and method

Abstract

Based on uninterruptible power supplies UPSa and UPSb for supplying power to a DCS system, an instrument system and an SIS system, the UPS power supply selection system comprises a switching module a, a switching module b, an energy storage module, a direct current module, a protection module, an anti-reverse module and a new energy power supply module, and the new energy power supply module comprises solar energy, wind energy and tide; according to the invention, any one power supply mode of new energy solar energy, wind energy, tidal energy and stored energy can be selected for millisecond-level access when power loss, power failure and UPS device failure occur, the purpose of stably supplying power to the UPS is achieved, meanwhile, when any one UPS loop fails, another UPS is directly switched to supply power to a terminal system, the stability of the UPS is improved, and the service life of the UPS is prolonged. The risk that the DCS system is powered off due to UPS faults is reduced; new energy is adopted for redundant supply of multiple power sources, stable operation of electric power is guaranteed, the environment is protected, and cost is saved. And stable transition of wind, light, electricity, storage and tidal power generation is realized in combination with the power operation condition of new energy.

Description

Technical Field

[0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a UPS power supply selection system and method. Background Art

[0002] In general, the UPS is powered by the mains, and the battery is connected to the host, providing a stable power supply voltage for the DCS system, SIS system, and instrument system through the host, rectifier, and inverter modules. When encountering severe weather such as line maintenance, strong winds, rain, and snow, the voltage may drop or be interrupted. At this time, the UPS will switch to the battery online to provide inverter power for the central control DCS system. However, the battery design power supply time of the UPS is mostly 90 minutes. If the power outage exceeds 90 minutes, the central control operation will lose power, and then the system will be shut down, seriously affecting production operations; the UPS power supply line does not have any access terminals for available new energy or other energy sources, nor does it have access terminals for external power generation equipment. Even if new energy and power generation equipment can be manually connected, the electrical equipment interlocking has the following problems: how to switch when the mains is restored, the new energy load capacity problem, the photovoltaic power generation voltage matching problem, the wind power generation frequency problem, the frequency change of natural gas power generation equipment, and the phase problem of the parallel three-phase power supply are all unsolvable.

[0003] With the maturity of new energy technologies, such as the extensive application of solar energy, wind energy, and tidal energy in the oil industry, UPS failures can be combined in a variety of ways to ensure system stability. The photovoltaic joint processing station can form photovoltaic complementarity with the power grid to ensure that DCS, remote cabinet rooms, emergency shutdown valves, and instrument air systems will not lose power. In the future, offshore platforms and artificial islands with tidal energy can form hydropower complementarity with the power grid to ensure that DCS, downhole safety valves, cable packers, and instrument systems will not lose power. After the construction of wind power generation in oil fields is completed in the future, wind power will form wind power complementarity with the power grid, providing an additional power redundancy for the UPS power supply.

[0004] In summary, it is necessary to design a UPS power supply selection system and method, combined with the power operation conditions of new energy, so as to achieve a smooth transition of wind, light, electricity, storage and tidal power generation. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a UPS power supply selection system and method. By realizing the UPS fault linkage switching function, once the city power is lost, multiple power supply modes such as photovoltaic, wind power, energy storage, and tidal power generation can be intelligently switched according to the operating logic to continuously provide power to the UPS and ensure the smooth operation of the production DCS system, SIS system, and instrument system.

[0006] In a first aspect, an embodiment of the present invention provides a UPS power supply selection system, based on uninterruptible power supplies UPSa and UPSb for powering a DCS system, an instrument system, and a SIS system, including: a switching module a, a switching module b, a DC module, an anti-reverse module, a protection module, a new energy power supply module, and an energy storage module;

[0007] The power supply end of UPSa is connected to the first mains power supply and is connected to the battery module through the protection module. The output end supplies power to the DCS system through the switching module a.

[0008] The power supply end of UPSb is connected to the second mains power supply, the new energy power supply module, and the energy storage module through the switching module b, and is connected to the battery module through the protection module. The output end supplies power to the DCS system, the instrument system, and the SIS system.

[0009] The energy storage module is connected to the DC module, the anti-reverse module, and the battery module in sequence to supply power to the battery module;

[0010] Wherein, the switching module a is used to switch the power supply selection of the DCS system, and the switching module b is used to switch the power supply selection of the UPS;

[0011] The anti-reverse module is used to prevent the energy storage module from discharging below a set value and then forming a reverse power supply;

[0012] The protection module is used to ensure stable operation and seamless switching of the switching module b.

[0013] Preferably, the switching module b, the new energy power supply module, the energy storage module and the second mains electricity form energy complementarity and emergency power supply complementarity.

[0014] Preferably, the new energy power supply module includes but is not limited to wind power generation, solar power generation, and tidal power generation.

[0015] In a second aspect, an embodiment of the present invention further provides a UPS power supply intelligent selection method, comprising the following contents:

[0016] In case of power outage due to mains failure, the switch module b provides multiple new energy power supply modes to access the UPS module to ensure power supply for the DCS system, instrument system and SIS system;

[0017] When a single UPS circuit fails, the UPS host data acquisition system and other sensor data are connected and judged to evaluate the UPS power supply stability. The UPS is connected through the switching module b and the energy storage module to power the DCS system, instrument system and SIS system.

[0018] The embodiments of the present invention bring the following beneficial effects:

[0019] 1. Through the research of a UPS power supply intelligent selection system and method, it has a fault linkage switching function. When power outages and UPS device failures occur, the power supply can be intelligently selected in milliseconds according to the data of new energy solar energy, wind energy, tidal energy and energy storage, so as to achieve the purpose of stable power supply for UPS. At the same time, when the UPS circuit fails, the power supply can also be directly switched across the UPS to supply power to the terminal system through logical switching, so as to provide guarantee for the stable operation of the UPS system and reduce the risk of DCS system shutdown caused by UPS system failure;

[0020] 2. The use of new energy for redundant power supply not only ensures stable power operation, but also protects the environment and saves costs.

[0021] 3. The power supply line is selected and switched according to logical operations in the event of a power failure. This method can also be applied to other power supply circuits and widely promoted in places requiring uninterrupted power supply.

[0022] Other features and advantages of the present invention will be described in the following description, and some features will become apparent from the description or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a UPS power supply intelligent selection system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] To facilitate understanding of this embodiment, a UPS power supply intelligent selection system and method disclosed in an embodiment of the present invention are first introduced in detail.

[0027] Embodiment 1 provides a UPS power supply selection system, based on uninterruptible power supplies UPSa and UPSb for powering a DCS system, an instrument system and a SIS system, including a switching module a, a switching module b, a battery pack module, a DC module 16, an anti-reverse module 17, a protection module, two AC power supplies, a new energy power supply module and an energy storage module 13; the battery pack module includes batteries 14 and 15, and the protection module includes protection modules 19 and 20.

[0028] Among them, the switching module b, energy storage module 13, new energy power supply module and mains 2 form energy complementarity and emergency power supply complementarity. The access mode is diversified, the module interface can be configured, the voltage level needs to be configured, and the detailed electrical parameters of the access need to be configured;

[0029] Furthermore, the new energy power supply module includes but is not limited to wind power generation 3, photovoltaic power generation 4, and tidal power generation 5.

[0030] The power supply end of UPSa is connected to the first mains power supply 1 and is connected to the battery module 15 through the protection module 20. The output end supplies power to the DCS system 10 through the switching module a.

[0031] The power supply end of UPSb is connected to the second mains power supply 2, the new energy power supply module, and the energy storage module 13 through the switching module b, and is connected to the battery module 14 through the protection module 19. The output end supplies power to the DCS system 10, the instrument system, and the SIS system.

[0032] The energy storage module 13 is connected to the DC module 16, the anti-reverse module 17, and the battery module in sequence to supply power to the battery module;

[0033] Wherein, the switching module a is used to switch the power supply selection of the DCS system, and the switching module b is used to switch the power supply selection of the UPS;

[0034] The anti-reverse module 17 is used to prevent the energy storage module 13 from discharging below a set value and then forming a reverse power supply.

[0035] The battery module 15 supplies power to the uninterruptible power supply UPSa and the switching module b through the protection module 20 .

[0036] The battery module 14 supplies power to the uninterruptible power supply UPSb and the switching module b through the protection module 19 .

[0037] The anti-reverse module is used to prevent the energy storage module from discharging below a set value and forming reverse power supply.

[0038] The protection module is a key module responsible for the stable operation and seamless switching of the switching module b, and the switching time and the switching logic relationship are closely related.

[0039] Embodiment 2 provides a UPS power supply intelligent selection method, including the following contents:

[0040] When the mains fails, the switching module b switches the power supply selection by controlling the new energy power supply module and the energy storage module, and provides a variety of new energy power supply modes to access the UPS to ensure power supply for the DCS system 10, the instrument operation room 11 and the pneumatic valve 12;

[0041] When a single UPS circuit fails, the UPS host data acquisition system and other sensor data are connected and judged to evaluate the power supply stability of the UPS. The UPS is connected through the switching module b and the energy storage module to power the DCS system 10, the instrument operation room 11 and the pneumatic valve 12.

[0042] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A UPS power supply selection system, based on uninterruptible power supplies UPSa and UPSb for powering DCS systems, instrument systems, and SIS systems, characterized in that: include: Switching module a, switching module b, DC module, protection module, anti-reverse module, new energy power module and energy storage module; The power supply end of UPSa is connected to the first mains power supply and is connected to the battery module through the protection module. The output end supplies power to the DCS system through the switching module a. The power supply end of UPSb is connected to the second mains power supply, the new energy power supply module, and the energy storage module through the switching module b, and is connected to the battery module through the protection module. The output end supplies power to the DCS system, the instrument system, and the SIS system. The energy storage module is connected to the DC module, the anti-reverse module, and the battery module in sequence to supply power to the battery module; The switching module a is used to switch the power supply selection of the DCS system, and the switching module b switches the power supply selection of the UPS by controlling the new energy power supply module, the energy storage module, and the mains; The anti-reverse module is used to prevent the energy storage module from discharging below a set value and then forming a reverse power supply; The protection module is used to ensure stable operation and seamless switching of the switching module b.

2. The UPS power supply selection system according to claim 1, characterized in that: The new energy power supply module includes but is not limited to wind power generation, solar power generation, and tidal power generation.

3. The UPS power supply selection system according to claim 1, characterized in that: The switching module b, the new energy power supply module, the energy storage module and the second mains electricity form energy complementarity and emergency power supply complementarity.

4. A method for utilizing the UPS power supply selection system of claim 1, characterized in that: In case of power outage due to mains failure, the switching module b switches the power supply options by controlling the new energy power supply module and the energy storage module, providing multiple new energy power supply modes to access the UPS and supply power to the DCS system, instrument system and SIS system; When a single UPS circuit fails, the UPS host data acquisition system and other sensor data are connected and judged to evaluate the UPS power supply stability. The UPS is connected through the switching module b and the energy storage module to power the DCS system, instrument system and SIS system.

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