CN201075179Y - Four-machine one-control type power plant auxiliary shop control system - Google Patents

Abstract

The utility model provides a four-machine one-control power plant auxiliary workshop control system, comprising an auxiliary workshop sub-system, a generator group, auxiliary concentration monitoring points which are respectively connected with the auxiliary workshop sub-system through network and control the auxiliary workshop sub-system and a concentration control room which monitors the generator group. The utility model is characterized in that the generator group is provided with four machine sets: model 1, model 2, model 3 and model 4; the concentration control room is a four-machine one-control room which can monitor the machine sets of model 1, model 2, model 3 and model 4 at the same time; furthermore, all the auxiliary control points of the auxiliary workshop sub-system are arranged in the four-machine one-control room. The utility model adopts the concentration control room with the four-machine one-control type which implements the monitoring and managing to a whole factory by one concentration control room, and improves the operation management level of the whole factory; furthermore, as control points and operators of the whole factory are reduced, the utility model saves operation and management cost.

Description

Four machines and one control type power plant auxiliary workshop control system

technical field

The utility model relates to a control system for an auxiliary workshop of a power plant, in particular to a highly centralized auxiliary workshop control system.

Background technique

With the further deepening of power system reform, ensuring high-quality and efficient operation of equipment, improving labor productivity, and improving economic benefits have become the goals of power plant development. Due to the low control level and equipment reliability in the early power plants, most of them used conventional analog dials as the main means of power plant operation. There were a large number of monitoring instruments and operation buttons in the control room. Multiple units used a centralized control room, which required a large number of The cables enter the control room from the field.

Later, the power plant began to gradually adopt the distributed control system (Distributed control system, DCS), but the control level and equipment reliability of the early power plant were low, and more operators were required. During the start-up, stop and operation of the unit, operators often needed to come to the site Inspection and problem handling, poor real-time control ability; in addition, due to the limited distance between the entire communication network of the early DCS and the communication network, it is not possible to adopt a centralized control room control method for multiple units. With the development of network and computer technology, the performance index of DCS itself has been greatly improved. The communication distance between the entire network of DCS and the communication network between two stations has increased. The maximum distance between some DCS network nodes can even be Up to 2000-4000 meters, the DCS operator station can be arranged in a centralized control room quite far away from its process cabinet, instead of the early DCS operator station can only be arranged near its process cabinet. Therefore, with the improvement of power plant automation level and equipment reliability, the new power plant now no longer needs a large number of operating personnel like the early power plant in the process of unit startup, shutdown and operation, and requires the operator to often visit the site and deal with problems. Only a small number of operating personnel and the cooperation of a very small number of local personnel can realize the start-stop control of the unit in the centralized control room.

At present, because most domestic power plants only have one or two units in the same period, the conventional arrangement for thermal power plants with multiple installed capacities is mostly two units and one control arrangement, that is, the unit unit adopts the DCS control system, and the LCD The monitor and large screen are used as the center to monitor and control the unit unit. By adopting the method of separating the control room and the electronic equipment room of the unit unit, the DCS process cabinets of the two unit units are respectively placed in the electronic equipment room near the unit unit, and the DCS operator stations of the two unit units are set in a whole In the centralized control room of the factory, only a small amount of communication cables, power supply and control cables are needed from the unit unit to the centralized control room of the whole factory. Compared with the previous method of setting up a centralized control room for multiple units, now two machines and one control are used for monitoring, and the mutual interference between the units is less; because the control room is closer to the two units, a lot of cables can be saved; and , It is more convenient for operating personnel to go from the control room to the site, and it is more timely to deal with site problems.

However, with the continuous expansion of the scale of the current power plant and the improvement of the power generation capacity, there has been a project to build four units at the same time in the power plant project. The layout method needs to set up multiple centralized control rooms and equip more operating personnel, which fails to achieve the best economic benefits and cannot meet the higher requirements of the power plant for reducing staff and increasing efficiency and improving the overall quality of operating personnel. Therefore, it is necessary to make an improvement on the basis of the existing two-unit-one-control arrangement, in order to cooperate with the simultaneous construction of four units of the power plant project and achieve better economic benefits.

Utility model content

The technical problem to be solved by the utility model is to provide a four-machine-one-control power plant auxiliary workshop control system with only one centralized control room in view of the above-mentioned prior art status.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: the four-machine-one-control auxiliary workshop control system of the power plant includes an auxiliary workshop subsystem, a generator set, and the auxiliary workshop subsystems are respectively networked and controlled. The auxiliary centralized monitoring point of the auxiliary workshop subsystem and the centralized control room for monitoring the generating set are characterized in that: the generating set has four units #1, #2, #3 and #4, and the The centralized control room is a four-machine one-control room that simultaneously monitors the #1, #2, #3 and #4 units, and the auxiliary centralized control points of each auxiliary workshop subsystem are set in the four-machine one-control room.

In order to realize the centralized control mode of four machines and one control, to facilitate management and improve the control level, the four machines and one control room includes a server, an engineer station, an operator station and a large-screen operator station, which are respectively connected to the optical fiber main switch to form a As a whole, the optical fiber main switch is connected with the supervisory information system (Supervisory Information System in plant level, SIS).

In order to enable the entire control system to cover the monitoring of various auxiliary workshop subsystems such as water, coal, ash, etc., the auxiliary workshop subsystem includes chemical water and water management system, coal handling program control system, #1#2 unit condensate water Fine treatment system, #3#4 unit condensate fine treatment system, #1#2 fly ash control system, #3#4 fly ash control system, ash reservoir area slag water control system, hydrogen production station control system, circulating water drug control system and other control systems.

The auxiliary workshop subsystem also includes respective sub-switches and respective programmable controller systems, the sub-switches and the corresponding programmable controller systems are connected through twisted pairs, and the sub-switches are respectively connected to the The optical fiber main switches mentioned above are connected by optical fibers. In this way, the above-mentioned four-machine-one-control room can realize centralized control and management of each auxiliary workshop subsystem through each of the above-mentioned sub-switches.

Compared with the prior art, the utility model has the advantages that: in the auxiliary control network of the power plant, an arrangement of four machines and one control is adopted, and the generator set, auxiliary workshop subsystems and monitoring points are effectively networked to realize a centralized control The monitoring and management of the whole plant by the office has improved the operation and management level of the whole plant; since the control points and operating personnel of the whole plant are reduced, the operation and management costs can be saved; in addition, due to the unification of hardware and software of the entire auxiliary control network system, Reduced inventory spare parts and daily management and maintenance costs. Moreover, because a lot of on-site control rooms have been canceled, construction and decoration costs have been reduced, and the configuration of on-site office facilities and operator stations has been reduced, thus reducing infrastructure costs.

Description of drawings

Fig. 1 is a schematic diagram of the overall system structure of the power plant according to the embodiment of the utility model.

Fig. 2 is a configuration diagram of the auxiliary control system of the power plant according to the embodiment of the utility model.

Detailed ways

The utility model is described in further detail below in conjunction with the accompanying drawings.

The auxiliary workshop control system is referred to as the auxiliary control network (Balance Of Plant, BOP). It uses advanced computer technology, communication technology and network technology to integrate and control the independent peripheral auxiliary systems to realize the peripheral control system. Personnel are on duty, improve the control level of peripheral equipment, reduce equipment failure rate, greatly improve labor productivity, and achieve the purpose of reducing staff and increasing efficiency.

As shown in Figure 1, it is a schematic diagram of the overall system structure of the power plant of the present invention. In the power plant, in addition to each independent unit generator set system of #1, #2, #3 and #4, it also includes the above-mentioned four units. System, including remote I/O control of fuel pump room, remote I/O control of coal transportation 6KV power distribution, public remote I/O control of air compressor #1#2 unit, public remote I/O control of air compressor #3#4 unit /O control, public I/O control of four electrical machines, etc., the I/O control of each public system and #1, #2, #3 and #4 units are connected to each other through the public system processor. The centralized control mode realizes the unified monitoring and control of the four units and the public system.

The power plant network structure of the utility model adopts a three-layer structure of control layer, network layer and management layer, wherein, the control layer is a programmable logic controller (PLC) control network, the network layer is industrial Ethernet, and the management layer adopts factory-level monitoring The information system (Supervisory Information System in plant level, SIS) is connected to the auxiliary control Ethernet through optical fiber, and the data is obtained from the auxiliary control network through OPC.

The configuration diagram of the power plant auxiliary control control system is shown in Figure 2. The four-machine-one-control power plant auxiliary workshop control system includes water, coal, ash and other auxiliary workshop subsystems, #1, #2, #3, # 4. Four generating sets, respectively network-connected with the auxiliary workshop subsystem and controlling the auxiliary centralized monitoring point of the auxiliary workshop subsystem, and the centralized control room for monitoring the generating sets. Among them, the centralized control room is a four-machine-one-control room that simultaneously monitors the #1, #2, #3, and #4 units, and the auxiliary centralized control points of each auxiliary workshop subsystem are set in the four-machine-one-control room 1 .

The four-machine-one control room 1 includes three servers 11, one engineer station 12, five operator stations 13 and a large-screen operator station 14, and also includes a server 11, engineer station 12, and operator station respectively. The optical fiber main switch 15 of the station 13 and the large-screen operator station 14, and the optical fiber main switch 15 is connected to the SIS.

Two of the three servers 11 are used as real-time data servers, IDAS software is installed in these two servers, and they are used as the lower computer PLC and the upper computer engineer station 12, operator station 13, large-screen operator 14 and historical data The data channels between the servers are mutually redundant; the other is used as a historical data server and installed with an InSQL industrial database system. The SIS reads the useful data of all systems in the auxiliary network through the server, and reads the PLC data through IDAS. At the same time, as the clock server of the auxiliary network, the historical data server receives the clock signal from the GPS clock source, so that the clocks of all computers in the auxiliary network can be synchronized. The engineer station is equipped with Intouch development version, PLC programming software and network management software, through which system screen editing, PLC programming and network management can be performed; the operator station and large-screen computer are installed with Intouch running version, and can be monitored through them All auxiliary control subsystems of the whole plant.

The whole system is equipped with two industrial-grade imported optical fiber main switches 15, and the equipment is arranged in the engineer station 12 cubicles next to the main control room, and redundant industrial-grade branch switches are configured in each auxiliary workshop. All switches have a 20% margin on their interfaces. Branch switches are arranged in the local cabinets of each PLC system, and each PLC system is responsible for power supply. The number of 15 ports of the optical fiber main switch is: 16 RJ45 ports, 12 ST optical fiber ports, and the connections with the peripheral ports are all connected with redundant cat5e cables and multi-mode optical fibers. The specific distribution is as follows: PLC to branch switches use twisted pairs ; The branch switch to the main switch uses optical fiber; the server, operator station (engineer station) to the main switch uses twisted pair wires; the BOP system is connected to the MIS system of the whole plant through the switch.

The auxiliary workshop subsystem specifically includes chemical water and water affairs management system 2, coal transportation program control system 3, #1#2 unit condensate polishing system 41, #3#4 unit condensate polishing system 42, #1 #2 fly ash control system 51, #3#4 fly ash control system 52, ash storage area slag water control system 6, hydrogen production station control system 7, circulating water dosing control system 8 and other control systems 9. The auxiliary workshop subsystem also includes respective sub-switches 21, 31, 411, 421, 511, 521, 61, 71, 81, 91, and programmable controller systems 211, 212, 32, 412, 422, 512, 522, 611, 622, 72, 82, 92, the sub-switches are connected to the corresponding programmable controller systems through twisted-pair wires, and the sub-switches are respectively connected to the optical fiber main switch through optical fibers. In this way, the above-mentioned four-machine-one-control room 1 can realize centralized control and management of each auxiliary workshop subsystem through each of the sub-switches, and connect the entire power plant into an integrated control network structure.

Each operation station is equipped with a redundant 10M/100M EtherNet network card, which is connected to the redundant EtherNet communication bus through a switch, so each CRT operation station is a station on the redundant communication bus. The BOP network operator station and each system monitoring station take interlocking measures to ensure that only one operator station can accept the operation instructions. The operation monitoring of the operator station has the functions of data acquisition, LCD screen display, parameter processing, over-limit alarm, tabulation printing, PLC parameter setting of each system, equipment monitoring, modification of control logic, system debugging and other functions.

The entire BOP system adopts the control logix 1756 series products of AB Company. The PLC control system adopts the dual-computer hot standby mode. The underlying network realizes network communication hot standby through the redundancy function of the controlnet network communication module, and the data communication exchange speed between the lower computers is the fastest. The speed is 5Mbps, and the upper computer and the main station are connected by dual standby Ethernet communication modules, and the communication speed can reach 100Mbps. The optical fiber communication is adopted between the hot standby redundant modules, and different types of I/O modules in each cabinet have spare points, and the module racks in each cabinet have module expansion interfaces.

Claims (4)

1. A four-machine-one-control type power plant auxiliary workshop control system, including an auxiliary workshop subsystem, a generator set, an auxiliary centralized monitoring point that is connected to the network of the auxiliary workshop subsystem and controls the auxiliary workshop subsystem, and The centralized control room for monitoring the generator set is characterized in that: the generator set has four units #1, #2, #3 and #4, and the centralized control room monitors the #1 unit at the same time. , #2, #3 and #4 units of four machines and one control room, and the auxiliary centralized control points of each auxiliary workshop subsystem are set in the four machines and one control room. 2. The four-machine-one-control power plant auxiliary workshop control system according to claim 1, characterized in that: the four-machine one-control room includes a server, an engineer station, an operator station and a large-screen operator station, and is connected to The optical fiber main switch becomes a whole system, and the optical fiber main switch is connected with the plant-level monitoring information system. 3. The four-machine-one-control power plant auxiliary workshop control system according to claim 1, characterized in that: the auxiliary workshop subsystem includes chemical water and water management system, coal handling program control system, #1#2 unit Condensate polishing system, #3#4 unit condensate polishing system, #1#2 fly ash control system, #3#4 fly ash control system, ash storage area slag water control system, hydrogen production station control system, circulation Water dosing control system and other control systems. 4. The four-machine-one-control power plant auxiliary workshop control system according to claim 3, characterized in that: said auxiliary workshop subsystem also includes its own sub-switch and its own programmable controller system, and said The sub-switches are connected to the corresponding programmable controller system through twisted-pair wires, and the sub-switches are respectively connected to the optical fiber main switch through optical fibers.

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