CN214370576U - Distributed control type heating power station control system - Google Patents
Distributed control type heating power station control system Download PDFInfo
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- CN214370576U CN214370576U CN202120539067.8U CN202120539067U CN214370576U CN 214370576 U CN214370576 U CN 214370576U CN 202120539067 U CN202120539067 U CN 202120539067U CN 214370576 U CN214370576 U CN 214370576U
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Abstract
The utility model provides a distribution control type heating power station control system, which comprises a PLC control cabinet and a frequency conversion cabinet, wherein a CPU in the PLC control cabinet is connected with an instrument signal acquisition part through an embedded port, the CPU is connected with an HMI through a router, and the CPU is connected with a data remote transmission part through the router; the frequency converter operation parameter acquisition part and the frequency converter instruction receiving part in the frequency conversion cabinet are connected through an embedded port, the frequency converter operation parameter acquisition part and the frequency converter instruction receiving part are both directly connected with a control terminal of the frequency converter through a control cable, and the frequency converter is connected with the circuit breaker through a power cable; set up the mainboard line connector on the PLC switch board, set up the subplate line connector on the frequency conversion cabinet, instrument signal acquisition part in the PLC switch board connects the mainboard line connector, and converter operating parameter acquisition part in the frequency conversion cabinet connects the subplate line connector, and mainboard line connector passes through circuit connection with the subplate line connector.
Description
Technical Field
The utility model belongs to the technical field of electrical apparatus, a station wiring structure is related to, especially a distribution control formula heating power station control system.
Background
The urban central heating has become the first choice heating mode of each urban heating system because of safety, high efficiency, environmental protection and energy conservation. And the heat station is an important component of the heat supply of the urban central heat supply heat source (heat company) for heat users. The smooth operation of the heating power station is the most important guarantee for providing high-quality heat supply for the residents in the vast cities by a heating power company. The remote transmission intelligent control system provides technical support for stable operation of the heating station.
The most core part in the remote transmission intelligent control system of the heating station is a PLC control cabinet (system). The core parts in the PLC control cabinet are a CPU (central processing unit) (the brain is responsible for data calculation and instruction sending), various signal receiving parts and an instruction sending part (collectively called PLC parts, which are responsible for sending acquired data to the CPU or sending instructions of the CPU to a frequency conversion cabinet and an execution mechanism). The CPU and the PLC component form a control system together and are installed in the PLC cabinet. The system is connected with a frequency conversion cabinet, an instrument, an actuating mechanism and the like of the heating station through a shielding cable. And receiving signals of the frequency conversion cabinet, each instrument and the execution mechanism, analyzing the signals, and sending an operation instruction to the frequency conversion cabinet and the execution mechanism according to a set program.
Because mutual signal interference exists between the CPU of the PLC controller and the frequency converter. In order to prevent interference, the PLC cabinet and the frequency conversion cabinet in the current heating station are respectively arranged so as to prevent signal interference from being generated between a CPU (central processing unit) part of the PLC and a frequency converter and influence the stability of the system. However, the CPU of the PLC controller must control the frequency converter (via the PLC components), which results in a large number of connection points between the PLC cabinets and the frequency converter cabinets. These connections account for about half of the connections in the entire thermal station.
With the development of socio-economy, the number of building layers is higher and higher, and the functions of the same building are more and more. More and more heating equipment are needed to be controlled in the same heating station. Parameter points and control points needing to be accessed in the heating station remote transmission intelligent control system are more and more, so that more and more data and control wiring points are also obtained; field wiring is also increasing.
Too much field wiring not only affects the field construction progress, but also is easy to connect wrong lines due to insufficient experience of constructors, and safety accidents can be caused. And because supply of material of most heating power station intelligence control system, installation are implemented by two companies respectively, what installation company wanted certainly think the cable between PLC cabinet and the inverter cabinet is "inside cable", need be constructed by the supplier, lead to often having the contradiction between purchasing side, supplier, constructor, delay the project progress. Therefore, the field wiring between the PLC cabinet and the frequency conversion cabinet needs to be reduced as much as possible, and unnecessary wiring on the field is transferred to a factory for carrying out the factory pre-assembly method.
SUMMERY OF THE UTILITY MODEL
The utility model aims at having above-mentioned problem to current technique, provided one kind with partial PLC part distribution install the frequency conversion cabinet in, reduced substantially the distributed control formula heating power station control system who works a telephone switchboard between PLC switch board and the frequency conversion cabinet.
The purpose of the utility model can be realized by the following technical proposal: a distribution control type control system of a heating power station comprises at least one PLC control cabinet and at least one frequency conversion cabinet, wherein a CPU, an instrument signal acquisition component, a data remote transmission component, an execution mechanism control component, an HMI (human machine interface), a router, a circuit breaker, a switching power supply and a transformer are at least arranged in the PLC control cabinet;
the frequency conversion cabinet is at least internally provided with a frequency converter, a frequency converter operation parameter acquisition component, a frequency converter instruction receiving component, a frequency converter control signal component and a circuit breaker, wherein the frequency converter operation parameter acquisition component is connected with the frequency converter instruction receiving component through an embedded port, the frequency converter operation parameter acquisition component and the frequency converter instruction receiving component are both directly connected with a control terminal of the frequency converter through a control cable, and the frequency converter is connected with the circuit breaker through a power cable;
set up the mainboard line connector on the PLC switch board, set up the subplate line connector on the converter cabinet, in the PLC switch board the instrument signal acquisition part passes through circuit connection the mainboard line connector, in the converter cabinet the converter operating parameter acquisition part passes through circuit connection the subplate line connector, the mainboard line connector with the subplate line connector makes through circuit connection the instrument signal acquisition part with converter operating parameter acquisition part forms communication connection, causes CPU with the instrument signal acquisition part the converter operating parameter acquisition part with converter instruction receiving element all forms communication connection.
In the distribution control type heating station control system, the PLC control cabinet can stably receive signals of PLC data parts in the frequency conversion cabinet, send out operation instructions, communicate with the intelligent heat supply platform and receive control signals of the intelligent heat supply platform. The other circuits among a CPU, an instrument parameter acquisition part, an execution mechanism control part, an HMI, a router, a circuit breaker, a switching power supply and a transformer which are arranged in the PLC control cabinet are connected and assembled according to a conventional mode through electric wires. And the other circuits among the frequency converter, the frequency converter operation parameter acquisition component, the frequency converter control signal component, the circuit breaker and the PLC component arranged in the frequency conversion cabinet are connected and assembled through electric wires according to a conventional mode.
In the above distributed control type thermal station control system, the CPU is connected to the HMI through the router via a 485 communication interface. The CPU sends the acquired signal to the HMI through the 485 communication interface and displays the signal on the HMI; meanwhile, the HMI also sends various instructions to the CPU through the 485 communication interface.
In the above distributed control type thermal station control system, the CPU is connected to the data remote transmission unit through an RJ45 interface via a router.
In the above distributed control type thermal station control system, the main board line connector and the sub board line connector are connected by a shielded line.
In the above distributed control type heating station control system, the PLC control cabinet is further provided with a plurality of indicator lights.
In the above control system of the distributed control type heating station, the frequency conversion cabinet is further provided with a plurality of indicator lights.
In the above distributed control type thermal station control system, the number of the PLC control cabinets is one, and the number of the frequency conversion cabinets is three; one PLC switch board is three district sharing PLC switch boards, three the frequency conversion cabinet specifically includes low district frequency conversion cabinet, middle district frequency conversion cabinet and high district frequency conversion cabinet.
In the above distributed control type thermal station control system, the main board line connector and the sub board line connector are arranged in pair in a matching manner.
The low-voltage frequency conversion cabinet has two modes of on-site operation and remote operation, and the two modes are interlocked. Under the on-the-spot operation mode, the frequency conversion cabinet need not to receive the signal of PLC switch board, and accessible cabinet door knob (button) is started by oneself and control corresponds the motor operation, and remote operation mode is invalid. Under the remote operation mode, the frequency conversion cabinet is only controlled by signals of the PLC cabinet, and the local operation mode is invalid.
And the PLC control cabinet receives the frequency converter signal transmitted by the low-voltage frequency conversion cabinet and sends a control signal to the low-voltage frequency conversion cabinet. The PLC control cabinet not only receives the signal of low-voltage frequency conversion cabinet, also receives the instrument signal in the heating power station scene, including but not limited to: temperature signal, pressure signal, liquid level signal, heat signal, flow signal, actuator signal.
After the PLC cabinet receives the signal, the CPU controls the low-voltage frequency conversion cabinet and the actuating mechanism in the heating power station site according to a preset program. And through data teletransmission part with on-the-spot data transmission to wisdom heat supply platform, show for the personnel on duty, provide basic data support for heat supply energy consumption analysis.
Compared with the prior art, the distribution control type heating power station control system has the following advantages:
1. 96% of connection points between the PLC cabinet and the frequency conversion cabinet of the heating power station are omitted, and the time consumption of the field construction of the part can be ignored and is not recorded.
2. Because signal, the control cable of each water pump motor all need not to insert in the PLC cabinet again, the wiring in the PLC cabinet reduces in a large number, makes the wiring in the PLC cabinet cleaner and tidier, convenient debugging and fault point seek.
3. And (3) forwarding the internal wiring between the PLC cabinet and the frequency conversion cabinet to a workshop for operation. The specialty of workshop wiring personnel and the detection before the electric cabinet leaves the factory are avoided, and the error of an internal wiring point in the cabinet is avoided. Only two wiring points are arranged between the field PLC cabinet and the distributed control type frequency conversion cabinet, and debugging personnel can achieve '0 error' in field wiring.
4. A PLC cabinet is used by multiple heat supply modes, cost is obviously saved, and field engineering amount and installation space are reduced.
Drawings
Fig. 1 is a schematic diagram of a field connection point of a conventional PLC control cabinet and a frequency conversion cabinet.
Fig. 2 is the layout schematic diagram of the PLC control cabinet of the present invention.
Fig. 3 is the utility model discloses well PLC switch board's wiring schematic diagram.
Fig. 4 is a layout schematic diagram of the middle frequency conversion cabinet of the present invention.
Fig. 5 is a schematic diagram of the connection of the middle expansion module terminal of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
the following case is the specific application of the PLC control cabinet and the distributed control type variable frequency cabinet in a heat supply station for providing heat supply service for three areas.
The heating plant supplies heat to a residential area with about 30 ten thousand square meters of building area and multiple storied and high-rise residences. The highest layer is 33 layers, and the multiple layers are 7 layers. The system is divided into three heat supply areas: low zone (multi-layer and below 7 high layers), middle zone (8 to 20 high layers), and high zone (21 to top floor). The heating equipment of the three areas is uniformly arranged in the heating power station of the underground second layer.
The invention is described below in three aspects:
first, the number of the electrical cabinets
Because there are three heating areas, each heating area needs one set of heating equipment, therefore need arrange three sets of heating equipment in this heating plant. Meanwhile, each set of heating equipment needs to be matched with a set of PLC control cabinet and a set of low-voltage frequency conversion cabinet (the two cabinets can be collectively called as electrical cabinets).
According to the conventional arrangement mode, three sets of heating equipment at least need 6 electrical cabinets (without a power distribution cabinet), and the arrangement and arrangement are as follows:
| low-region PLC cabinet | Central area PLC cabinet | High-area PLC cabinet | Low-region frequency conversion cabinet | Middle area frequency conversion cabinet | High-area frequency conversion cabinet |
Use the utility model discloses afterwards, only need 4 regulator cubicles (not containing the switch board), arrange the following table of range:
second, field wiring aspect
And the PLC cabinet and the frequency conversion cabinet of the heating power station are connected with each parameter and control point by using a shielding cable.
The shielding line wiring points required to be connected between the conventional PLC cabinet and the frequency conversion cabinet, 28 parameter signals and control signals are required to be wired between the PLC cabinet and the frequency conversion cabinet in a heat supply area, each signal requires 2 wiring points, and 56 wiring points are required in total. The total number of the wiring points between the PLC cabinet and the frequency conversion cabinet in the three areas is 168. Fig. 1 shows a connection point between a conventional PLC cabinet and a frequency conversion cabinet in a heating area.
The utility model discloses wiring between PLC switch board and low-voltage frequency conversion cabinet is whole to be integrated in the distribution control formula low-voltage frequency conversion cabinet. The number of wiring points between the PLC cabinet and the frequency conversion cabinet is reduced to 2.
As shown in fig. 2 to 5, the distribution control type thermal power station control system includes at least one PLC control cabinet and at least one frequency conversion cabinet, the PLC control cabinet is at least internally provided with a CPU, an instrument signal acquisition component, a data remote transmission component, an execution mechanism control component, an HMI, a router, a circuit breaker, a switching power supply, and a transformer, the instrument signal acquisition component includes an instrument signal acquisition component IO1 and an instrument signal acquisition component IO2, the CPU is connected with the instrument signal acquisition component IO1 and the instrument signal acquisition component IO2 through embedded ports, the CPU is connected with the HMI through the router, and the CPU is connected with the data remote transmission component through the router to transmit upper system data and receive instructions;
the frequency conversion cabinet is at least internally provided with a frequency converter, a frequency converter operation parameter acquisition part IO3, a frequency converter instruction receiving part IO4, a frequency converter control signal part and a circuit breaker, wherein the frequency converter operation parameter acquisition part IO3 is connected with the frequency converter instruction receiving part IO4 through an embedded port, the frequency converter operation parameter acquisition part IO3 and the frequency converter instruction receiving part IO4 are directly connected with a control terminal of the frequency converter through a control cable, and the frequency converter is connected with the circuit breaker through a power cable;
set up the mainboard connector on the PLC switch board, set up the subplate connector on the frequency conversion cabinet, instrument signal acquisition part IO1 and instrument signal acquisition part IO2 in the PLC switch board pass through the circuit connection mainboard connector, converter operating parameter acquisition part IO3 in the frequency conversion cabinet passes through the circuit connection subplate connector, mainboard connector and subplate connector make instrument signal acquisition part IO1 and instrument signal acquisition part IO2 and converter operating parameter acquisition part IO3 form communication connection through circuit connection, cause CPU and instrument signal acquisition part IO1, instrument signal acquisition part IO2, converter operating parameter acquisition part IO3 and converter instruction receiving part IO4 all form communication connection.
In the distribution control type heating station control system, the PLC control cabinet can stably receive signals of PLC data parts in the frequency conversion cabinet, send out operation instructions, communicate with the intelligent heat supply platform and receive control signals of the intelligent heat supply platform. The other circuits among a CPU, an instrument parameter acquisition part, an execution mechanism control part, an HMI, a router, a circuit breaker, a switching power supply and a transformer which are arranged in the PLC control cabinet are connected and assembled according to a conventional mode through electric wires. And the frequency converter arranged in the frequency conversion cabinet, the frequency converter operation parameter acquisition component IO3, the frequency converter control signal component, and other circuits between the circuit breaker and the PLC component are connected and assembled through electric wires according to a conventional mode.
The CPU is connected with the HMI through the 485 communication interface and the router. The CPU sends the acquired signal to the HMI through the 485 communication interface and displays the signal on the HMI; meanwhile, the HMI also sends various instructions to the CPU through the 485 communication interface.
The CPU is connected with the data remote transmission part through the RJ45 interface and the router.
The main board line connector and the auxiliary board line connector are communicated through a shielding line.
And a plurality of indicator lamps are also arranged on the PLC control cabinet.
And a plurality of indicator lamps are also arranged on the frequency conversion cabinet.
The number of the PLC control cabinets is one, and the number of the frequency conversion cabinets is three; a PLC switch board is three district sharing PLC switch boards, and three frequency conversion cabinets are including low district frequency conversion cabinet, middle district frequency conversion cabinet and high district frequency conversion cabinet specifically.
The main board line connector and the auxiliary board line connector are matched in pairs.
The low-voltage frequency conversion cabinet has two modes of on-site operation and remote operation, and the two modes are interlocked. Under the on-the-spot operation mode, the frequency conversion cabinet need not to receive the signal of PLC switch board, and accessible cabinet door knob (button) is started by oneself and control corresponds the motor operation, and remote operation mode is invalid. Under the remote operation mode, the frequency conversion cabinet is only controlled by signals of the PLC cabinet, and the local operation mode is invalid.
And the PLC control cabinet receives the frequency converter signal transmitted by the low-voltage frequency conversion cabinet and sends a control signal to the low-voltage frequency conversion cabinet. The PLC control cabinet not only receives the signal of low-voltage frequency conversion cabinet, also receives the instrument signal in the heating power station scene, including but not limited to: temperature signal, pressure signal, liquid level signal, heat signal, flow signal, actuator signal.
After the PLC cabinet receives the signal, the CPU controls the low-voltage frequency conversion cabinet and the actuating mechanism in the heating power station site according to a preset program. And through data teletransmission part with on-the-spot data transmission to wisdom heat supply platform, show for the personnel on duty, provide basic data support for heat supply energy consumption analysis.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (8)
1. A distribution control type heating power station control system comprises at least one PLC control cabinet and at least one frequency conversion cabinet, and is characterized in that a CPU, an instrument signal acquisition component, a data remote transmission component, an execution mechanism control component, an HMI (human machine interface), a router, a circuit breaker, a switching power supply and a transformer are at least arranged in the PLC control cabinet, the CPU is connected with the instrument signal acquisition component through an embedded port, the CPU is connected with the HMI through the router, and the CPU is connected with the data remote transmission component through the router to transmit upper system data and receive instructions;
the frequency conversion cabinet is at least internally provided with a frequency converter, a frequency converter operation parameter acquisition component, a frequency converter instruction receiving component, a frequency converter control signal component and a circuit breaker, wherein the frequency converter operation parameter acquisition component is connected with the frequency converter instruction receiving component through an embedded port, the frequency converter operation parameter acquisition component and the frequency converter instruction receiving component are both directly connected with a control terminal of the frequency converter through a control cable, and the frequency converter is connected with the circuit breaker through a power cable;
set up the mainboard line connector on the PLC switch board, set up the subplate line connector on the converter cabinet, in the PLC switch board the instrument signal acquisition part passes through circuit connection the mainboard line connector, in the converter cabinet the converter operating parameter acquisition part passes through circuit connection the subplate line connector, the mainboard line connector with the subplate line connector makes through circuit connection the instrument signal acquisition part with converter operating parameter acquisition part forms communication connection, causes CPU with the instrument signal acquisition part the converter operating parameter acquisition part with converter instruction receiving element all forms communication connection.
2. The distributed control thermal station control system of claim 1 wherein the CPU is coupled to the HMI through the router via a 485 communications interface.
3. The distributed control thermal station control system of claim 1 wherein said CPU is connected to said data remote transmission unit via a router via an RJ45 interface.
4. The distributed control thermal station control system of claim 1 wherein said main board line connector and said sub board line connector are connected by shielded wires.
5. The distributed control thermal station control system of claim 1 wherein the PLC control cabinet further comprises a plurality of indicator lights.
6. The distributed control thermal station control system of claim 1 wherein a plurality of indicator lights are also mounted on the inverter cabinet.
7. The distributed control thermal station control system of claim 1 wherein the number of PLC control cabinets is one and the number of inverter cabinets is three; one PLC switch board is three district sharing PLC switch boards, three the frequency conversion cabinet specifically includes low district frequency conversion cabinet, middle district frequency conversion cabinet and high district frequency conversion cabinet.
8. The distributed control thermal station control system of claim 7 wherein said main board line connectors are mated in pairs with said secondary board line connectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120539067.8U CN214370576U (en) | 2021-03-15 | 2021-03-15 | Distributed control type heating power station control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120539067.8U CN214370576U (en) | 2021-03-15 | 2021-03-15 | Distributed control type heating power station control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214370576U true CN214370576U (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120539067.8U Active CN214370576U (en) | 2021-03-15 | 2021-03-15 | Distributed control type heating power station control system |
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| Country | Link |
|---|---|
| CN (1) | CN214370576U (en) |
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2021
- 2021-03-15 CN CN202120539067.8U patent/CN214370576U/en active Active
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