Coal conveying control system of thermal power plant

Abstract

The utility model discloses a thermal power plant coal conveying control system, which comprises a service layer, a network layer, a control layer and an equipment layer, the network layer comprises two access switches, the two access switches form a looped network and carry out data exchange through an Ethernet communication mode, and the switches are electrically connected with a server. The control system provided by the utility model is divided into four layers, namely a service layer, a network layer, a control layer and an equipment layer, the service layer, the network layer and the control layer all realize a dual-computer hot standby function, and the stability of system data is enhanced.

Description

Technical Field

[0001] The utility model relates to a remote control technology, in particular to a coal transportation control system for a thermal power plant. Background Art

[0002] The coal transportation control system of thermal power plants is mainly based on belt conveyor transportation. In order to ensure the normal operation of the belt conveyor and improve the level of automation control, it is necessary to equip it with an intelligent control system. The stability of the control system and network communication will directly affect the production efficiency of the power department.

[0003] See also Figure 1 The control system of conventional belt conveyors uses PLC as the main controller. The service layer is equipped with only one server. The network layer is based on a star network structure. The control layer based on a single controller controls the various actuators in the system. This architecture is prone to service data loss, communication instability, and controller instability.

[0004] Therefore, it is necessary to carry out stable and effective automated remote monitoring of coal transportation and to manage the operation status, fault diagnosis and other operations of the coal transportation system. Utility Model Content

[0005] The utility model provides a coal transportation control system for a thermal power plant, a control system dual-machine hot standby mode based on a ring Ethernet with safe and reliable communication, stable collected signals and a long service life.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a coal transportation control system for a thermal power plant, comprising a service layer, a network layer, a control layer and an equipment layer, wherein:

[0007] The service layer includes servers, which are used to build intelligent technical support, interactive platforms, and data collection and storage;

[0008] The network layer includes two access switches, which form a ring network and exchange data via Ethernet. The switches are electrically connected to the server. The ring network is characterized by Ethernet remaining operational even when single or multiple failure points occur.

[0009] The control layer includes two control machines, namely the scheduling background host and the operation and maintenance background host. The two control machines are connected through channels such as optical fiber and Ethernet, and are electrically connected to access switches respectively.

[0010] The equipment layer includes a coal feeder and multiple auxiliary equipment thereof, and the two master station control machines are electrically connected to the equipment in the multiple equipment layers respectively.

[0011] Preferably, the servers are two servers of the same model and configuration and connected via a ring Ethernet.

[0012] Preferably, the server is installed with dual network cards which are respectively connected to two access switches.

[0013] Preferably, the two control machines are two sets of completely identical control machines and are redundant to each other.

[0014] Preferably, the coal feeder adopts a belt conveyor, the belt conveyor and its ancillary equipment are divided into areas, and a master station control machine is configured to connect with the belt conveyor and its ancillary equipment in the area.

[0015] Beneficial effects of the utility model:

[0016] The utility model adopts the above technical solution, which enhances the stability of system data. By rationally configuring two servers, dual-machine hot standby is achieved to ensure that data is not lost when one of the servers is abnormal.

[0017] The stability of network communication is enhanced by using a dedicated ring network switch to build a dual-ring network, and the network's communication equipment can automatically switch communication links;

[0018] The stability of the control system is enhanced. If two controllers with the same configuration are set with the same configuration and the same program is downloaded, when one of them fails, the other can automatically and seamlessly switch to the running state to ensure the stable operation of the control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art and the beneficial effects of the present invention, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other structures can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 Schematic diagram of a conventional belt conveyor system architecture.

[0021] Figure 2 The system architecture of the present invention based on ring Ethernet dual-machine hot standby is illustrated. DETAILED DESCRIPTION

[0022] Specific embodiments of the present utility model:

[0023] like Figure 2 As shown, a coal transportation control system for a thermal power plant in this embodiment includes a service layer, a network layer, a control layer, and a device layer, wherein:

[0024] The service layer includes servers, which are used to build intelligent technical support, interactive platforms, and data collection and storage;

[0025] The network layer includes two access switches, which form a ring network and exchange data via Ethernet. The switches are electrically connected to the server. The ring network is characterized by Ethernet remaining operational even when single or multiple failure points occur.

[0026] The control layer includes two control machines, namely the scheduling background host and the operation and maintenance background host. The two control machines are connected through channels such as optical fiber and Ethernet, and are electrically connected to access switches respectively.

[0027] The equipment layer includes a coal feeder and multiple auxiliary equipment thereof, and the two master station control machines are electrically connected to the equipment in the multiple equipment layers respectively.

[0028] The servers described in this embodiment are two servers of the same model and configuration and connected via a ring Ethernet.

[0029] The server described in this embodiment is installed with dual network cards and connected to two access switches respectively.

[0030] The two control machines described in this embodiment are two completely identical control machines and are redundant to each other.

[0031] The coal feeder described in this embodiment adopts a belt conveyor. The belt conveyor and its ancillary equipment are divided into areas. A master station control machine is configured to connect with the belt conveyor and its ancillary equipment in the area. The ancillary equipment in the area includes a coal crusher, an iron remover, a dust collector, a level meter, a speed switch, a coal pulling switch, a vibrator, etc.

[0032] This embodiment uses two servers of the same model and configuration, installs the same application software, and reasonably sets the system parameters to ensure that the two services can realize the dual-machine hot standby function of automatic switching. The two servers use dual network cards to access the ring network respectively; the network layer uses two identical model ring network dedicated switches, and builds a dual-ring network by correctly setting the parameters and functions. When one of the two ring network switches fails, the communication equipment in the network can achieve intercommunication through the other ring network; the control layer uses two sets of master station module groups of the same model. The master station modules should ensure that the firmware version and control program are exactly the same, and must be equipped with dedicated redundant modules. The redundant modules are connected by dedicated high-speed optical fibers to achieve real-time communication to ensure that the data of the two sets of master station module groups are completely synchronized.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A coal handling control system for a thermal power plant, characterized in that: It includes a service layer, a network layer, a control layer, and a device layer, wherein: the service layer includes a server, which is used to build intelligent technical support, an interactive platform, and data collection and storage; The network layer includes two access switches, which form a ring network and exchange data via Ethernet communication. The switches are electrically connected to the server. The control layer includes two control machines, a scheduling background host and an operation and maintenance background host. The two control machines are connected through optical fiber and Ethernet channels, and are electrically connected to access switches respectively. The equipment layer includes a coal feeder and multiple auxiliary equipment thereof, and the two master station control machines are electrically connected to the equipment in the multiple equipment layers respectively.

2. The coal handling control system of a thermal power plant according to claim 1, characterized in that: The servers are two servers of the same model and configuration and are connected via a ring Ethernet.

3. The coal handling control system of a thermal power plant according to claim 2, characterized in that: The server is installed with dual network cards and connected to two access switches respectively.

4. The coal handling control system of a thermal power plant according to claim 3, characterized in that: The two control machines are two sets of completely identical control machines and are redundant to each other.

5. The coal transportation control system of a thermal power plant according to claim 4, characterized in that: The coal feeder adopts a belt conveyor, and the belt conveyor and its ancillary equipment are divided into areas. A master station control machine is configured to connect with the belt conveyor and its ancillary equipment in the area.

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