CN110768370B - Intelligent control system and method for electrical equipment of power supply and distribution system - Google Patents
Intelligent control system and method for electrical equipment of power supply and distribution system Download PDFInfo
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- CN110768370B CN110768370B CN201910991751.7A CN201910991751A CN110768370B CN 110768370 B CN110768370 B CN 110768370B CN 201910991751 A CN201910991751 A CN 201910991751A CN 110768370 B CN110768370 B CN 110768370B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
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Abstract
The intelligent control system comprises a distributed control system, a backup power supply and distribution system consisting of a power grid power supply system and a generator power supply system, an electrical equipment power distribution unit, electrical equipment, a switching system for switching between the power grid power supply system and the generator power supply system, wherein the distributed control system is connected with the electrical equipment power distribution unit, the switching system is respectively connected with the power grid power supply system and the generator power supply system, the power grid power supply system and the generator power supply system are connected with the electrical equipment power distribution unit through power supply buses, the electrical equipment power distribution unit is connected with the electrical equipment, the intelligent control system also comprises a voltage detection device respectively connected with the power supply buses and the distributed control system and used for detecting the power supply voltage on the power supply buses, and if the power supply voltage detection device meets preset conditions, a voltage signal is sent to the distributed control system, the distributed control system sends a power supply signal to the electrical equipment power distribution unit, and the electrical equipment power distribution unit supplies power to the electrical equipment.
Description
Technical Field
The invention belongs to the technical field of power supply equipment, and particularly relates to an intelligent Control System and method for electrical equipment of a power supply and distribution System, and an implementation method for intelligent management of the electrical equipment based on the intelligent Control System.
Background
In the air separation power supply and distribution system, two major parts are generally included: normal power supply and distribution system and emergency power supply and distribution system. The normal power supply and distribution system is powered by a power grid and mainly supplies power to electrical equipment during normal production; the emergency power supply and distribution system mainly comprises two parts, namely a power grid and a diesel generator, as shown in fig. 1, each incoming line loop is provided with an incoming line cabinet which is respectively a power grid incoming line cabinet and a diesel generator incoming line cabinet. A switching system is arranged between a switch in the power grid incoming line cabinet and a switch in the diesel generator incoming line cabinet, the switching system ensures that the power grid and the diesel generator do not supply power to the emergency power supply and distribution system at the same time, and only one power supply loop is allowed to supply power to the emergency power supply and distribution system at any time. Specifically, when the power supply of the power grid is normal, a switch Q1 in the power grid incoming line cabinet is closed, a switch in the diesel generator incoming line cabinet is in an off state, the power grid supplies power to the emergency power supply system, and the diesel generator can receive a power grid voltage normal signal and is in a standby state; when the power grid loses power suddenly, the diesel generator receives a power grid power loss signal, the system quickly and automatically starts the diesel generator, and after the diesel generator automatically finishes starting and normally works within a specified time (generally within 15 s), the switch Q1 in the power grid inlet cabinet is firstly switched off, then the switch Q2 in the diesel generator inlet cabinet is switched on, and the diesel generator supplies power to the emergency power supply system.
However, in the above-described power supply and distribution design of the space division backup system, the backup system is supplied with power from the emergency power supply and distribution system, and the backup system electrical devices are controlled by the Distributed Control System (DCS), and since there is no power supply state signal of the backup system in the DCS, the power supply state of the backup system is unclear by the DCS. Meanwhile, for the reliability and stability of production, the main pumps in the main air separation device and the backup system are designed to be used one by one and used two by two, namely one pump is in a running state, and the other pump is in a standby state. If the pump in operation suddenly jumps, the pump in standby mode will start immediately according to the production requirements. Therefore, the electrical equipment in the current backup system has no intelligent management, and the backup system has the following defects: when the power grid loses power suddenly, a pump running in the backup system jumps, and the DCS starts the pump in the backup state before the backup system is switched to a diesel generator for power supply or another power supply and distribution line for power supply because the DCS does not know the power supply state of the backup system, so that the starting failure of the backup pump can be caused, the continuity of material supply is influenced, and the production efficiency is reduced.
Therefore, research and improvement on the existing power supply management are required.
Disclosure of Invention
The invention aims to solve the technical problems that the DCS cannot monitor the power supply state of a backup system and the backup pump possibly fails to start in the power supply switching process, and provides an intelligent system for electrical equipment of a power supply and distribution system.
In order to achieve the purpose, the invention adopts the following technical scheme:
supply distribution system electrical equipment intelligence control system, including the collection and distribution formula control system, by reserve power supply distribution system, electrical equipment distribution unit and the electrical equipment that electric wire netting power supply system and generator power supply system constitute to and be arranged in switching system that any system carries out the power supply among switching electric wire netting power supply system, the generator power supply system, the collection and distribution formula control system is connected with electrical equipment distribution unit, switching system with electric wire netting power supply system, generator power supply system connect respectively, electric wire netting power supply system, generator power supply system pass through the power supply generating line with electrical equipment distribution unit connects, electrical equipment distribution unit with electrical equipment connects its characterized in that: the system also comprises a voltage detection device which is respectively connected with the power supply bus and the distributed control system and is used for detecting whether the power supply voltage on the power supply bus meets the preset condition or not, and if so, sending a voltage signal to the distributed control system;
the distributed control system sends a power supply signal to the electrical equipment power distribution unit according to the voltage signal;
and the electrical equipment power distribution unit supplies power to the electrical equipment according to the power supply signal.
Furthermore, the voltage detection device adopts a relay, and two ends of the relay are respectively connected with the power supply bus and the distributed control system. The relay detects whether the bus has voltage, when the bus voltage is normal, the relay works, and an auxiliary contact of the relay is closed; when the bus is in power loss, the relay does not work, and the auxiliary contact of the relay is disconnected.
Further, the power grid power supply system comprises a power grid and a power grid incoming line cabinet, the power grid incoming line cabinet and a power supply bus are sequentially connected, and the power grid incoming line cabinet is connected with the switching system;
a first switch is arranged in the power grid incoming line cabinet and used for switching on or switching off voltage transmission between a power grid and a power supply bus;
or the generator power supply system comprises a diesel generator and a diesel generator incoming line cabinet, the diesel generator incoming line cabinet and the power supply bus are sequentially connected, and the diesel generator incoming line cabinet is connected with the switching system;
and a second switch is arranged in the diesel generator incoming line cabinet and used for switching on or switching off voltage transmission between the diesel generator and the power supply bus.
Furthermore, the switching system comprises a mechanical interlock and an electrical interlock, and the switching system is respectively connected with the first switch and the second switch and is used for ensuring that only one of the second switch and the second switch is in a closing state. The second switch and the second switch are ensured to be in different opening or closing states, the power grid and the generator are prevented from supplying power at the same time, and a single system is in a power supply state.
Furthermore, the system also comprises a UPS (uninterrupted power supply), wherein the UPS is connected with the distributed control system and supplies power to the distributed control system.
Further, the switching system is an automatic and/or manual switching system.
The invention also provides an intelligent control method for the electrical equipment of the power supply and distribution system, which comprises the following steps:
s1, a power supply supplies power, and a power grid power supply system or a generator power supply system supplies power to a power supply bus;
s2, collecting the voltage of a power supply bus, collecting the voltage of the power supply bus by using a voltage detection device, and transmitting the collected voltage signal to a distributed control system;
s3, judging a voltage signal, wherein the distributed control system judges whether the voltage signal meets a preset condition, and if so, sends a power supply signal to an electrical equipment power distribution unit;
and S4, starting the electrical equipment, wherein the power distribution unit of the electrical equipment supplies power to the electrical equipment according to the power supply signal, and the electrical equipment is started to work.
Further, the step S1 further includes switching a power supply, where the switching system switches power supply to the power supply bus in the grid power supply system or the generator power supply system, the switching system is connected to the first switch in the grid power supply system and the second switch in the generator power supply system, and the switching system switches power supply to the power supply bus from the grid power supply system and the generator power supply system. The first switch and the second switch are ensured to be in different opening or closing states through the connection of the switching system and the first switch and the second switch respectively.
Furthermore, a mechanical interlock and an electrical interlock are arranged in the switching system, so that the two switches cannot be in a closing state at the same time.
Further, the step S2 further includes receiving a switch-on signal of a switch, where the distributed control system receives a switch-on signal of the grid power supply system or the generator power supply system;
when the distributed control system receives the closing signal and the voltage detection device detects a voltage signal meeting a preset condition, the distributed control system sends a starting signal to the electrical equipment power distribution unit, and the electrical equipment power distribution unit supplies power to the electrical equipment.
Further, in the method, the voltage of the power supply bus is collected by using a voltage detection device, specifically, a relay is used for collecting.
Further, the switching system in the method is an automatic and/or manual switching system. The power supply of the distributed control system in the method is realized by a UPS.
The intelligent electrical equipment management system and method have high social value and economic value. For example: when the power grid loses power suddenly, the electric equipment running in the backup system jumps, the system starts the diesel generator G, the diesel generator G finishes starting and works normally, and the backup system is switched from the power supply of the power grid to the power supply of the diesel generator G. And when the power supply of the backup system is switched, namely the power supply of the backup system is recovered to be normal, the starting of the electrical equipment is allowed. Only when the backup system supplies power normally, the DCS starts the electrical equipment, the electrical equipment is enabled to be started and put into operation quickly, and production continuity is guaranteed, so that intelligent management of each electrical equipment is achieved.
Compared with the prior art, the invention has the beneficial effects that:
1. by adding the voltage detection device, the voltage on the power supply bus is ensured to meet the power supply requirement, and then the power is supplied to the electrical equipment, so that the effective operation of the subsequent air separation main device and the backup system is ensured;
2. compared with the traditional power supply mode, the existing power supply and distribution system does not need to be changed too much, so that the intelligent system and the method are more convenient to use on the existing basis, and the system after use is more reliable to operate;
3. the intelligent management of the electrical equipment of the power supply and distribution system is realized on the basis of simple circuit and electrical design, the intelligent management is realized through the relay KA and the DCS, the complexity of the circuit is simplified, and the intelligent degree of the system is increased.
Drawings
Fig. 1 is a schematic diagram of a conventional backup system electrical device management system.
FIG. 2 is a schematic diagram of an intelligent backup system electrical equipment management system of the present invention;
FIG. 3 is a schematic illustration of the intelligent backup system electrical equipment management system signaling of the present invention;
FIG. 4 is a flow chart of an intelligent backup system electrical device management method of the present invention.
Detailed Description
The technical scheme of the invention is further described and illustrated by specific embodiments below, so that the technical scheme is clearer and more obvious.
Example 1
As shown in fig. 2 and fig. 3, the present embodiment discloses an intelligent control system for electrical devices of a power supply and distribution system, which mainly includes the following components:
the backup power supply and distribution system consists of a power grid power supply system and a generator power supply system;
a switching system which is respectively connected with the power grid power supply system and the generator power supply system and is used for switching any one system of the power grid power supply system and the generator power supply system to supply power,
the power supply system comprises an electrical equipment power distribution unit S and electrical equipment, wherein the electrical equipment power distribution unit S is connected with the electrical equipment and supplies power to the electrical equipment through the electrical equipment power distribution unit S;
a Distributed Control System (DCS) connected to the electrical equipment power distribution unit;
the power grid power supply system and the generator power supply system are connected with the electrical equipment power distribution unit through power supply buses;
the relay KA is respectively connected with the power supply bus and the distributed control system and is used for detecting whether the power supply voltage on the power supply bus meets a preset condition or not, and if the power supply voltage on the power supply bus meets the preset condition, a voltage signal is sent to the distributed control system;
the distributed control system sends a power supply signal to the electrical equipment power distribution unit according to the voltage signal; and the electrical equipment power distribution unit supplies power to the electrical equipment according to the power supply signal.
As a preferred implementation manner of this embodiment, the power grid power supply system in this embodiment includes a power grid and a power grid incoming line cabinet, where the power grid, the power grid incoming line cabinet, and a power supply bus are sequentially connected, and the power grid incoming line cabinet is connected to the switching system;
and a first switch Q1 is arranged in the power grid inlet wire cabinet and used for switching on or switching off voltage transmission between a power grid and a power supply bus.
As a preferred implementation manner of this embodiment, the generator power supply system in this embodiment includes a diesel generator G and a diesel generator incoming line cabinet, where the diesel generator, the diesel generator incoming line cabinet, and a power supply bus are sequentially connected, and the diesel generator incoming line cabinet is connected to the switching system;
and a second switch Q2 is arranged in the diesel generator inlet wire cabinet and is used for switching on or switching off voltage transmission between the diesel generator and the power supply bus.
The voltage detection device adopts the existing voltage detection device. In this embodiment, the relay KA is preferably used to detect the voltage. The relay KA detects whether the power supply bus has voltage, when the bus voltage is normal, the relay KA works, the auxiliary contact K is closed, and the logic signal of the voltage signal B is 1; when the bus is in power loss, the relay KA does not work, the auxiliary contact K is disconnected, and the logic signal of the voltage signal B is 0.
As a preferred embodiment, the system is further provided with a UPS uninterruptible power supply, and the UPS uninterruptible power supply is connected to the distributed control system to supply power to the distributed control system.
In a preferred embodiment, the switching system includes a mechanical interlock and an electrical interlock, the switching system is connected to the first switch and the second switch, and the switching system is configured to ensure that only one of the second switch and the second switch is in a closed state.
In a preferred embodiment, the distributed control system automatically starts the power supply of the generator when detecting that the power supply of the power grid is abnormal (such as power loss), that is, the switching of the automatic power supply system can be realized, the power supply is normally supplied by the power grid through the power supply system of the power grid, and the power supply is supplied by the diesel generator of the power supply system of the generator in the power loss condition.
As a preferred embodiment, the switching of the power supply method in the present embodiment may be performed automatically or by receiving a switching, that is, the switching system may be an automatic or manual switching system, or a switching system having both automatic and manual switching functions.
In this embodiment, the preset condition is that the voltage on the power supply bus is in a stable state, for example, the transmission voltage is not changed, and the DCS allows the start of the electrical device meeting the start condition to start, specifically, the DCS controls the operation of the electrical device of the backup system through the electrical device power distribution unit S.
Specifically, referring to fig. 2, the power supply and distribution system of the backup system is composed of a power grid and a diesel generator G, and the electrical equipment of the backup system is powered by the power grid or the diesel generator G. The DCS acquires the power supply state (voltage signal B) of the backup system through the auxiliary contact of the relay KA, the DCS knows whether the backup system is normally supplied with power or not, and the DCS can determine whether the backup system electrical equipment is allowed to be started or not, therefore, the power supply state of the backup system is used as one of the conditions for allowing the electrical equipment to be started, and the starting of the backup system electrical equipment is controlled by the power supply state of the backup system. When the backup system is normally powered, namely the bus voltage of the backup system is normal, the DCS allows the electrical equipment meeting the starting condition to be started, and the DCS controls the work of the electrical equipment of the backup system through the electrical equipment power distribution unit S. Therefore, in the power supply switching process of the power grid and the diesel generator G, the DCS flexibly controls the starting of each electrical device according to the power supply state of the backup system, ensures the normal starting of the devices, realizes the smooth completion and the operation of the electrical devices, and realizes the intelligent management.
For further details with reference to the signal transmission relationship shown in fig. 3, the power supply and distribution system of the backup system is composed of a power grid and a diesel generator G, and the electrical equipment of the backup system is powered by the power grid or the diesel generator G. Mechanical interlocking and electrical interlocking are arranged between power supply of the power grid and power supply of the diesel generator G, the power grid and the diesel generator G are guaranteed not to supply power to the backup system at the same time, only one power supply loop is allowed to supply power to the backup system at any time, therefore, the signal C and the signal D cannot be normal at the same time, and meanwhile, the DCS can obtain the power supply state of the backup system through the signal C and the signal D. If the signal C is normal, the backup system is powered by the power grid at the moment; if the signal D is normal, the backup system is powered by the diesel generator G at the moment; if both signal C and signal D are not normal, then the backup system is in a power-off state at this time. The DCS acquires the power supply state of the backup system through the signal C and the signal D, the DCS also knows the respective states of the power grid and the diesel generator G, meanwhile, the DCS not only knows whether the backup system is normally powered, but also knows which system the backup system is powered by, and the DCS can determine whether the backup system electrical equipment is allowed to be started, so that the power supply state of the backup system is one of the conditions that the electrical equipment is allowed to be started, and the starting of the backup system electrical equipment is controlled by the power supply state of the backup system. When the backup system is normally powered, that is, the bus voltage of the backup system is normal, the DCS allows the electrical equipment with the starting condition to be started, and controls the operation of the electrical equipment of the backup system through the electrical equipment power distribution unit S. Therefore, in the power supply switching process of the power grid and the diesel generator G, the DCS flexibly controls the starting of each electrical device according to the power supply state of the backup system, ensures the normal starting of the devices, realizes the quick starting and the operation of the electrical devices, and realizes the intelligent management.
The power supply and distribution system electrical equipment intelligent system in this embodiment includes a power grid power supply switch Q1, a diesel generator power supply switch Q2, a relay KA, an electrical equipment power distribution unit S, a diesel generator G, electrical equipment, and a DCS, which are connected to the power supply and distribution system. In practical applications, the grid power supply switch Q1, the diesel generator power supply switch Q2, the relay KA, the electrical equipment distribution unit S, the diesel generator G, and the DCS may be present in various forms, for example: the physical modules may be present in an overall physical form or may be relatively independent from one another in terms of logical functionality, regardless of physical form. Therefore, in the description of the present invention, they are separate independent functional modules, but the specific structure, shape, and the like of each function are not limited.
The following description is made of the relationship and implementation principle of the systems of the present embodiment. Specifically, the system has the following relations and implementation principles:
(1) the power supply and distribution system of the backup system consists of a power grid and a diesel generator G, so the power supply and distribution system consists of two incoming line loops, and each incoming line loop is provided with an incoming line cabinet which is respectively a power grid incoming line cabinet and a diesel generator incoming line cabinet. A first switch Q1 in the power grid inlet cabinet and a second switch Q2 in the diesel generator inlet cabinet are mechanically and electrically interlocked, so that the power grid and the diesel generator G are ensured not to supply power to the backup system at the same time, and only one power supply loop is allowed to supply power to the backup system at any time. When the power supply of the power grid is normal, a first switch Q1 in the power grid inlet cabinet is closed, a second switch Q2 in the diesel generator inlet cabinet is in an open state, the DCS controls the electrical equipment according to the power supply state of the backup system and the conditions of process, electricity and the like, and the power grid supplies power to the backup system electrical equipment; when the power grid loses power suddenly, the diesel generator G starts and supplies power normally, the first switch Q1 in the power grid inlet cabinet is disconnected, then the second switch Q2 of the diesel generator inlet cabinet is closed, the DCS controls the work of the electrical equipment according to the power supply state of the backup system and the conditions of process, electricity and the like, and the diesel generator G supplies power to the electrical equipment of the backup system. The DCS controls the electrical equipment of the backup system under the power supply state of the backup system, and the work of the electrical equipment of the backup system is controlled by the DCS. The DCS obtains the power supply state of the backup system through the state of the auxiliary contact K of the relay KA, and the starting of the electrical equipment of the backup system is controlled by the state of the relay KA. The relay KA is electrified, the auxiliary contact K of the relay KA is closed, and the bus voltage of the backup system is normal at the moment; when the relay KA loses power, the auxiliary contact K of the relay KA is disconnected, and the bus voltage of the backup system is abnormal at the moment. The relay KA allows the starting of the electrical equipment meeting the starting condition in the backup system only when detecting that the backup system is normally powered; the stopping of the electrical equipment is controlled by the DCS through the electrical equipment distribution unit S, which shuts down the electrical equipment according to actual demand and field conditions.
(2) The relay KA is connected with the DCS through a signal line, and the power supply state of the backup system can be determined through the state of the auxiliary contact K of the relay KA, so that the DCS can obtain the power supply state of the backup system through the state of the auxiliary contact K of the relay KA; the relay KA is electrified, the auxiliary contact K of the relay KA is closed, and the bus voltage of the backup system is normal at the moment; when the relay KA loses power, the auxiliary contact K of the relay KA is disconnected, and the bus voltage of the backup system is abnormal at the moment. The electrical equipment is connected with a power supply and distribution system of the backup system through an electrical equipment power distribution unit S, and the DCS controls the electrical equipment power distribution unit S to start and stop the electrical equipment.
(3) The electrical equipment is connected with the DCS through a signal line, so that the DCS can acquire working parameters and states of the electrical equipment, the electrical equipment can acquire information from the DCS, for example, the DCS can acquire the running state, working current and the like of the electrical equipment, and meanwhile, the electrical equipment can receive the information from the DCS; only if the backup system supplies power normally, the DCS starts the electrical equipment meeting the starting condition through the electrical equipment power distribution unit S, and the electrical equipment is started smoothly and put into operation. If the backup system is not properly powered, the DCS will not start the electrical equipment.
(4) The DCS distributed control system comprises control equipment and software (the prior art is adopted, and the discussion is not repeated too much), and the DCS controls the power supply and the work of the electrical equipment through the on-off of the power distribution unit S of the electrical equipment.
The working mode of the system can be divided into 2 stages: 1) a power supply stage of a power grid; 2) and a diesel generator power supply stage. In the power supply stage of the power grid, the power grid supplies power to the backup system through the first switch Q1, and the electrical equipment of the backup system is supplied with power by the power grid and normally operates; when the power grid suddenly loses power, the running electrical equipment jumps. The system starts the diesel generator G, after the diesel generator G runs normally, a first switch Q1 in a power grid inlet cabinet is disconnected, then a second switch Q2 in the diesel generator inlet cabinet is closed, the diesel generator G supplies power to the backup system, and the diesel generator G supplies power to the backup system through a second switch Q2. Only if the backup system recovers normal power supply does the DCS allow the electrical equipment to be started. The DCS acquires the power supply state of the backup system through the state of the auxiliary contact K of the relay KA, and controls the work of the electrical equipment through the power distribution unit S of the electrical equipment. If the electrical equipment meets the starting condition and the supply voltage of the backup system is normal, the DCS controls the power distribution unit S of the electrical equipment to start the electrical equipment. The DCS acquires the power supply state of the backup system through the state of the auxiliary contact K of the relay KA, the power supply state of the backup system is one of conditions for starting the electrical equipment, so that the starting of the electrical equipment is controlled by the power supply state of the backup system, and the DCS controls the work of the electrical equipment through the power distribution unit S of the electrical equipment, so that the DCS can determine when to start the electrical equipment according to the actual condition and the power supply state of the backup system, the electrical equipment is ensured to be started and put into use smoothly in a short time, and the production continuity is ensured. The system does not influence the normal use of the electrical equipment on the basis of ensuring the smooth starting of the electrical equipment, and realizes the intelligent management of the electrical equipment in the power supply and distribution system.
Example 2
Corresponding to the system of embodiment 1, this embodiment further provides an intelligent control method for electrical devices of a power supply and distribution system, as shown in fig. 3 and 4, the method mainly includes the following steps:
s1, a power supply supplies power, and a power grid power supply system or a generator power supply system supplies power to a power supply bus;
s2, collecting the voltage of a power supply bus, collecting the voltage of the power supply bus by using a voltage detection device, and transmitting the collected voltage signal to a distributed control system;
s3, judging a voltage signal, wherein the distributed control system judges whether the voltage signal meets a preset condition, and if so, sends a power supply signal to an electrical equipment power distribution unit;
and S4, starting the electrical equipment, wherein the power distribution unit of the electrical equipment supplies power to the electrical equipment according to the power supply signal, and the electrical equipment is started to work.
In this embodiment, the preset condition refers to a working voltage required for normal operation of the electrical device to be operated.
In this embodiment, the step S1 further includes a step of switching the power supply, where the power supply is switched to the power supply bus in the grid power supply system or the generator power supply system through a switching system, the switching system is connected to the first switch in the grid power supply system and the second switch in the generator power supply system, and the power supply is selected from the grid power supply system and the generator power supply system to the power supply bus through the switching of the switching system.
As a preferred embodiment, a mechanical interlock and an electrical interlock are provided in the switching system, and the 2 interlocks are arranged so that the two switches cannot be simultaneously closed. And the control of the switching-on sequence of the switch can be further realized.
As a preferred embodiment, step S2 further includes receiving a switch-on signal of a switch, where the distributed control system receives the switch-on signal of the grid power supply system or the generator power supply system, and determines that the current power supply system supplies power to the grid power supply system or the generator power supply system;
when the distributed control system receives the closing signal and the voltage detection device detects a voltage signal meeting a preset condition, the distributed control system sends a starting signal to the electrical equipment power distribution unit, and the electrical equipment power distribution unit supplies power to the electrical equipment.
As a preferred embodiment, step S2 further includes determining a closing signal, where the distributed control system receives the closing signal and determines, according to the closing signal, that the current power supply system supplies power to the grid power supply system or the generator power supply system.
In the method, a voltage detection device is used for collecting the voltage of the power supply bus, and a specific implementation mode is to collect the voltage by using a relay KA. In order to ensure the normal operation of the DCS, the UPS is specially arranged for supplying power to the DCS.
As a preferred embodiment, the switching system is an automatic and/or manual switching system.
The implementation principle of the intelligent management method of the present embodiment can be referred to the description in the system.
In addition to the foregoing, it should be further appreciated that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally herein. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (10)
1. The utility model provides a supply distribution system electrical equipment intelligence control system, includes distributed control system, the reserve distribution system, electrical equipment distribution unit and the electrical equipment that constitute by electric wire netting power supply system and generator power supply system to and be arranged in switching system that any system carries out the power supply among electric wire netting power supply system, the generator power supply system, distributed control system and electrical equipment distribution unit are connected, switching system with electric wire netting power supply system, generator power supply system connect respectively, electric wire netting power supply system, generator power supply system pass through the power supply generating line with electrical equipment distribution unit connects, electrical equipment distribution unit is connected with electrical equipment, its characterized in that: the system also comprises a voltage detection device which is respectively connected with the power supply bus and the distributed control system and is used for detecting whether the power supply voltage on the power supply bus meets the preset condition or not, and if so, sending a voltage signal to the distributed control system;
the distributed control system sends a power supply signal to the electrical equipment power distribution unit according to the voltage signal;
the electrical equipment power distribution unit supplies power to the electrical equipment according to the power supply signal;
when the distributed control system detects that the power supply of the power grid is abnormal, the generator is automatically started to supply power, the switching of the automatic power supply system can be realized, the power is supplied by the power grid through the power grid power supply system under the normal condition, and the power is supplied by the diesel generator of the generator power supply system under the power loss condition.
2. The intelligent control system for the electrical equipment of the power supply and distribution system according to claim 1, wherein the power grid power supply system comprises a power grid and a power grid incoming line cabinet, the power grid incoming line cabinet and a power supply bus are sequentially connected, and the power grid incoming line cabinet is connected with the switching system;
and a first switch is arranged in the power grid incoming line cabinet and used for switching on or switching off voltage transmission between a power grid and a power supply bus.
3. The intelligent control system for the electrical equipment of the power supply and distribution system according to claim 2, wherein the generator power supply system comprises a diesel generator and a diesel generator incoming line cabinet, the diesel generator incoming line cabinet and a power supply bus are sequentially connected, and the diesel generator incoming line cabinet is connected with the switching system;
and a second switch is arranged in the diesel generator incoming line cabinet and used for switching on or switching off voltage transmission between the diesel generator and the power supply bus.
4. The intelligent control system for electric equipment of power supply and distribution system according to claim 3, wherein the switching system comprises a mechanical interlock and an electrical interlock, and the switching system is connected with the first switch and the second switch respectively and is used for ensuring that only one of the second switch and the second switch is in a closed state.
5. The intelligent control system for electric equipment of power supply and distribution system according to any one of claims 1-4, wherein the switching system is an automatic and/or manual switching system;
or, the voltage detection device is a relay;
or, the system also comprises a UPS, and the UPS is connected with the distributed control system and supplies power to the distributed control system.
6. An intelligent control method for electrical equipment of a power supply and distribution system based on the intelligent control system of claim 1, which is characterized by comprising the following steps:
s1, a power supply supplies power, and a power grid power supply system or a generator power supply system supplies power to a power supply bus;
s2, collecting the voltage of a power supply bus, collecting the voltage of the power supply bus by using a voltage detection device, and transmitting the collected voltage signal to a distributed control system;
s3, judging a voltage signal, wherein the distributed control system judges whether the voltage signal meets a preset condition, and if so, sends a power supply signal to an electrical equipment power distribution unit;
and S4, starting the electrical equipment, wherein the power distribution unit of the electrical equipment supplies power to the electrical equipment according to the power supply signal, and the electrical equipment is started to work.
7. The intelligent control method for the electrical equipment of the power supply and distribution system according to claim 6, wherein the step S1 further includes switching the power supply, and switching the power supply to the power supply bus in the grid power supply system or the generator power supply system through a switching system, the switching system is connected to a first switch in the grid power supply system and a second switch in the generator power supply system, respectively, and the power supply to the power supply bus is selected from the grid power supply system and the generator power supply system through the switching of the switching system.
8. The intelligent control method for the electrical equipment of the power supply and distribution system according to claim 6 or 7, characterized by further comprising a switching system for switching any one of a grid power supply system and a generator power supply system to supply power, wherein a mechanical interlock and an electrical interlock are arranged in the switching system to realize automatic and manual switching.
9. The intelligent control method for the electrical equipment of the power supply and distribution system according to claim 6 or 7, wherein the step S2 further comprises receiving a switch-on signal of a switch, and the distributed control system receives a switch-on signal of the grid power supply system or the generator power supply system;
when the distributed control system receives the closing signal and the voltage detection device detects a voltage signal meeting a preset condition, the distributed control system sends a starting signal to the electrical equipment power distribution unit, and the electrical equipment power distribution unit supplies power to the electrical equipment.
10. The intelligent control method for the electrical equipment of the power supply and distribution system according to claim 8, wherein the switching system is an automatic and/or manual switching system;
or, in the method, the voltage of the power supply bus is collected by using a voltage detection device, specifically, a relay is used for collecting;
or, the power supply of the distributed control system in the method is realized by a UPS.
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| CN202798136U (en) * | 2012-07-24 | 2013-03-13 | 中冶南方工程技术有限公司 | Switching circuit of power supplies of transformer and large-power diesel generator |
| CN103066585A (en) * | 2012-12-13 | 2013-04-24 | 中国矿业大学 | Power supply detection and abnormal reverse power transmission control device |
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| CN203301225U (en) * | 2013-06-02 | 2013-11-20 | 深圳市广前电力有限公司 | Control device based on security-section interlocking self-switchover of gas-steam combined unit |
| EP3190682B1 (en) * | 2014-09-01 | 2021-06-02 | Vertiv Tech Co., Ltd. | Power supply system and method |
| CN104362729A (en) * | 2014-10-15 | 2015-02-18 | 郑照 | Power supply switching device of safety guarantee system |
| CN107294202B (en) * | 2016-03-31 | 2022-09-23 | 中兴通讯股份有限公司 | Power distribution control circuit method and device |
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| CN202798136U (en) * | 2012-07-24 | 2013-03-13 | 中冶南方工程技术有限公司 | Switching circuit of power supplies of transformer and large-power diesel generator |
| CN103066585A (en) * | 2012-12-13 | 2013-04-24 | 中国矿业大学 | Power supply detection and abnormal reverse power transmission control device |
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