CN113504755A - SCADA monitoring system and method based on hybrid cloud framework - Google Patents

SCADA monitoring system and method based on hybrid cloud framework Download PDF

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Publication number
CN113504755A
CN113504755A CN202110836794.5A CN202110836794A CN113504755A CN 113504755 A CN113504755 A CN 113504755A CN 202110836794 A CN202110836794 A CN 202110836794A CN 113504755 A CN113504755 A CN 113504755A
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China
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data
cloud
cloud platform
public
private
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CN202110836794.5A
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Inventor
刘亮
朱敏
鲁锦伸
李卉
朱义林
林晨
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Zhenjinag Klockner Moeller Electrical Systems Co ltd
Nanjing Daqo Electrical Institute Co Ltd
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Zhenjinag Klockner Moeller Electrical Systems Co ltd
Nanjing Daqo Electrical Institute Co Ltd
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Priority to CN202110836794.5A priority Critical patent/CN113504755A/en
Publication of CN113504755A publication Critical patent/CN113504755A/en
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/04Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0428Safety, monitoring
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/20Pc systems
    • G05B2219/24Pc safety
    • G05B2219/24024Safety, surveillance

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Alarm Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

The invention relates to the technical field of power system monitoring, in particular to an SCADA monitoring system and method based on a hybrid cloud framework, wherein the system comprises the following components: the cloud controller device is connected with the managed local industrial device; the private cloud platform comprises a front communication server and a private database, wherein the front communication server is in communication connection with the cloud controller equipment, stores received data sent by the cloud controller equipment in the private database, and forwards the data to the public cloud platform; the public cloud platform is used for storing mirror image data of the private cloud platform and providing user service; the network security equipment is used for isolating the private cloud platform data from the public cloud platform; the mobile terminal is used for accessing and checking data on the public platform; the PDA device can be communicated with the cloud controller device and the public cloud platform at the same time, and can be used for polling and controlling industrial equipment locally through the cloud controller device and supporting access and check of data on the public cloud platform.

Description

SCADA monitoring system and method based on hybrid cloud framework
Technical Field
The invention relates to the technical field of power system monitoring, in particular to an SCADA monitoring system and method based on a hybrid cloud framework.
Background
An scada (supervisory Control And Data acquisition) system, i.e., a Data acquisition And monitoring Control system, is a computer-based dcs (distributed Control system) And an automatic monitoring system, And is widely used in the fields of industry, electric power, rail transit, metallurgy, petrochemical industry, And the like. The SCADA system can realize functions of data acquisition, equipment control, measurement, parameter adjustment, various signal alarms and the like, adopts a C/S (client/server) framework, is deployed in a single-server mode and is limited by the computing capacity of server hardware, and only a limited amount of sensing data can be managed by the conventional SCADA system, so that the SCADA system does not have multi-project management capacity and has no advantages in cost, for example, field operation and maintenance personnel needing to be equipped by distributed household photovoltaic, residential community low-voltage systems and the like are hard to bear only in cost;
in order to solve the problems, in the related technology, a traditional SCADA system is deployed on a cloud platform, a distributed computing architecture of the cloud platform supports the capacity of acquiring, storing, computing and analyzing mass data, is compatible with various abundant user interaction modes, can conveniently support mobile application, and can solve the practical problems that the traditional SCADA system is limited in data access and processing capacity, difficult to manage projects distributed across geographic areas, difficult to manage multiple projects simultaneously, high in deployment cost and the like;
however, the above scheme of deploying the conventional SCADA on the cloud platform needs to consider the cost problem in implementation, because high-frequency data access to the device through the cloud platform requires high cost, but if low-frequency data access is adopted, the high reliability requirement in the industrial field cannot be met.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the SCADA monitoring system and method based on the hybrid cloud framework are provided, and reliability monitoring of industrial equipment under the condition of low-frequency data access is achieved.
In order to achieve the purpose, the invention adopts the technical scheme that:
in one aspect, a SCADA monitoring system based on a hybrid cloud architecture is provided, which includes:
the cloud controller equipment is connected with the administered local industrial equipment and is used for acquiring and sending real-time data of the local industrial equipment;
the private cloud platform comprises a front communication server and a private database, wherein the front communication server is in communication connection with the cloud controller equipment, stores the received data sent by the cloud controller equipment in the private database, and forwards the data to the public cloud platform;
the public cloud platform comprises an application server and a public database and is used for storing data and providing user services;
the network security equipment is connected with the private cloud platform and the public cloud platform and is used for isolating the private cloud platform from the public cloud platform;
the mobile terminal is in communication connection with the public cloud platform and is used for accessing and checking data on the public platform;
and the PDA equipment is communicated with the cloud controller equipment and the public cloud platform and is used for accessing and checking data on the public cloud platform and locally inspecting and controlling the industrial equipment through the cloud controller equipment.
Further, the cloud controller device forwards the data to the pre-communication server through a VPN public network channel of an operator.
Further, the data are transmitted through an internet of things protocol MQTT.
Further, the front-end communication server supports data access of a plurality of cloud controller devices.
Further, the network security device is a forward isolation device or a firewall gateway.
Further, the mobile terminal is a mobile phone, a tablet or a notebook.
Further, the PDA device is in communication connection with the cloud controller device through wifi or Bluetooth.
Further, the PDA device has access to a designated cloud controller device.
On the other hand, the invention also provides a monitoring method of the SCADA monitoring system based on the hybrid cloud framework, which comprises the following steps:
acquiring data of industrial equipment, transmitting the data to a front communication server on a private cloud platform and storing the data in a private database;
the prepositive communication server forwards the data to a public cloud platform, stores the data in a public database and provides an application server for access query;
and if the mobile terminal receives the alarm information pushed by the application server, the PDA device is used for being in communication connection with the cloud controller device so as to control the industrial device connected with the cloud controller device.
Further, when the acquired data of the industrial equipment is transmitted to a front-end service server on a private cloud platform, the following transmission method is adopted:
setting a fixed transmission period for the steady-state scene data in a periodic transmission mode;
the method comprises the steps that an instant uploading mode is adopted for burst data of a transient scene, and data of abnormal alarm, remote signaling deflection and fixed value adjustment events are uploaded to a front-end communication server in an instant mode;
for an unstable communication link scene, data is stored in a local nonvolatile storage medium of the cloud controller, and after the link is recovered to be stable, the data stored in the local is transmitted.
The invention has the beneficial effects that: the invention ensures the reliability monitoring of the industrial equipment under the condition of low-frequency data access through different data transmission strategies, and reduces the communication cost while not losing important data; the network security equipment isolates the data on the private cloud platform from the public cloud platform, and in addition, data mirroring is implemented, so that the data on the public cloud can be quickly recovered by using the data of the private cloud even if the data on the public cloud is damaged, and the data security is improved; and can visit the public cloud system at any time through mobile terminal, alarm information can also initiatively push to mobile terminal, has solved the inconvenience that traditional SCADA system needs fixed workplace to bring. Through the arrangement of the scheme, low-frequency data access is realized and the reliability of control is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a SCADA monitoring system based on a hybrid cloud architecture in an embodiment of the present invention;
fig. 2 is a flowchart of steps of a monitoring method of a SCADA monitoring system based on a hybrid cloud architecture in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The SCADA monitoring system based on the hybrid cloud architecture as shown in fig. 1 includes a cloud controller device 10, a private cloud platform 20, a network security device 40, a public cloud platform 30, a mobile terminal 50 and a PDA device 60, wherein:
the cloud controller device 10 is connected with the administered local industrial device and is used for acquiring and sending real-time data of the local industrial device; the cloud controller device 10 is responsible for data acquisition and forwarding of industrial devices, is deployed in specific projects, is a low-cost embedded device, and is provided with RS485 channels, Ethernet channels, 3G/4G/5G channels and Bluetooth/WIFI channels. The cloud controller device 10 is provided with a GUID and can be used as a unique identifier in a range governed by the SCADA cloud system, and the cloud controller device 10 collects real-time data of local industrial devices governed by the cloud controller device through various industrial communication protocols such as Modbus, OPC UA, IEC 60870-5 series and the like.
The private cloud platform 20 comprises a front communication server 21 and a private database 22, wherein the front communication server 21 is in communication connection with the cloud controller device 10, stores received data sent by the cloud controller device 10 in the private database 22, and forwards the data sent by the cloud controller device 10 to the public cloud platform 30; the public cloud platform 30 comprises an application server 31 and a public database 32, wherein the public database 32 is used for storing data, and the application server 31 is used for providing user services; the network security device 40 is connected with the private cloud platform 20 and the public cloud platform 30, and is used for isolating the private cloud platform 20 from the public cloud platform 30; the mobile terminal 50 is in communication connection with the application server 31 of the public cloud platform and is used for accessing services on the public platform; the PDA device 60 communicates with the cloud controller device 10 for locally polling and controlling the industrial device through the cloud controller device 10.
The invention ensures the reliability monitoring of the industrial equipment under the condition of low-frequency data access through different data transmission strategies, and reduces the communication cost while not losing important data; the network security device 40 isolates the data on the private cloud platform 20 from the public cloud platform 30, and in addition, data mirroring is implemented, so that the data on the private cloud can be quickly recovered by using the data of the private cloud even if the data on the public cloud platform 30 is damaged, and the data security is improved; moreover, the system of the public cloud platform 30 can be accessed at any time through the mobile terminal 50, alarm information can be actively pushed to the mobile terminal 50, and inconvenience caused by the fact that a traditional SCADA system needs to be fixed in a working place is solved. Through the arrangement of the scheme, low-frequency data access is realized and the reliability of control is improved.
In the embodiment of the present invention, the cloud controller device 10 forwards the data to the front-end communication server 21 through a VPN public network channel of an operator, and the data is transmitted through an internet of things protocol MQTT. It should be noted here that MQTT protocol refers to message queue telemetry transport, which is a protocol designed for communication with a large number of sensors and control devices that have limited computational power and operate in low bandwidth, unreliable networks. MQTT uses the publish/subscribe message mode, can realize the message is pushed actively, its message network overhead is small, can provide the hierarchical message and publish the service quality. The VPN private network channel can ensure the bandwidth and the safety of data transmission, and the message grading service quality and the active pushing of the MQTT can ensure the real-time performance and the integrity of key data.
In the embodiment of the present invention, the front communication server 21 supports data access of a plurality of cloud controller devices 10. Theoretically, the front-end communication server 21 supports an unlimited number of cloud controller devices 10, and during specific transmission, the GUID uploaded in a communication message by the cloud controller devices 10 is used as a data source identifier, and the front-end communication server 21 stores data of field devices in the private database 22.
Specifically, the network security device 40 is a forward isolation device or a firewall gateway; the mobile terminal 50 is a mobile phone, a tablet or a notebook; the PDA device 60 is in communication connection with the cloud controller device 10 through wifi or bluetooth; the PDA device 60 specifies that the cloud controller device 10 has access rights.
In the embodiment of the present invention, the mobile terminal 50 can only monitor the device remotely, but cannot control the device, and through this setting, on one hand, the access frequency through the private cloud platform 20 is reduced, and on the other hand, the security performance is also improved; when the PDA device 60 is used to connect the field industrial device, the PDA device 60 is registered via the SCADA cloud system, and may be a mobile phone, and has an access right to the designated cloud controller device 10.
An embodiment of the present invention further provides a monitoring method of the SCADA monitoring system based on the hybrid cloud architecture as shown in fig. 2, including the following steps:
s10: acquiring data of industrial equipment, transmitting the data to a front communication server on a private cloud platform and storing the data in a private database;
s20: the prepositive communication server forwards the data to a public cloud platform, stores the data in a public database and provides an application server for access query;
s30: and if the mobile terminal receives the alarm information pushed by the application server, the PDA device is used for being in communication connection with the cloud controller device so as to control the industrial device connected with the cloud controller device.
In the above embodiment, by mirroring the data in the private database 22 onto the public cloud platform 30 for the mobile terminal 50 to access and query, compared with the prior art, the data access frequency on the private cloud platform 20 is reduced, and the overall security performance of the system is improved; and when the problem is found, the PDA is used for carrying out control on the site, so that the engineering implementation cost is reduced on one hand, and the high reliability requirement in the industrial field is met on the other hand.
In the embodiment of the present invention, when transmitting the acquired data of the industrial device to the front-end service server on the private cloud platform 20, the following transmission method is adopted:
setting a fixed transmission period for the steady-state scene data in a periodic transmission mode;
the method comprises the steps that an instant uploading mode is adopted for burst data of a transient scene, and data of abnormal alarm, remote signaling deflection and fixed value adjustment events are immediately uploaded to a front-end communication server 21;
for the unstable scene of the communication link, data is stored in a local nonvolatile storage medium, and after the link is recovered to be stable, the data stored in the local is transmitted. It should be noted that, in the embodiment of the present invention, the priorities of the three transmission modes are ranked as the highest priority of burst data in a transient scene, and the second periodic transmission mode in a steady scene is the lowest in an unstable scene of a communication link; by setting the transmission strategy, the cost is reduced, and the stability of the link is improved.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A SCADA monitoring system based on a hybrid cloud architecture, comprising:
the cloud controller equipment is connected with the administered local industrial equipment and is used for acquiring and sending real-time data of the local industrial equipment;
the private cloud platform comprises a front communication server and a private database, wherein the front communication server is in communication connection with the cloud controller equipment, stores the received data sent by the cloud controller equipment in the private database, and forwards the data to the public cloud platform;
the public cloud platform comprises an application server and a public database and is used for storing mirror image data of the private database and providing user services;
the network security equipment is connected with the private cloud platform and the public cloud platform and is used for isolating the private cloud platform from the public cloud platform;
the mobile terminal is in communication connection with the public cloud platform and is used for accessing and checking data on the public platform;
and the PDA equipment is communicated with the cloud controller equipment and the public cloud platform and is used for accessing and checking data on the public cloud platform and locally inspecting and controlling the industrial equipment through the cloud controller equipment.
2. A SCADA monitoring system based on a hybrid cloud architecture as claimed in claim 1 wherein the cloud controller device forwards data to the pre-posed communication server through an operator's VPN public network channel.
3. A SCADA monitoring system based on a hybrid cloud architecture according to claim 2, characterized in that the data is transmitted through an Internet of things protocol MQTT.
4. A SCADA monitoring system based on a hybrid cloud architecture according to claim 1, wherein the front-end communication server supports data access for multiple cloud controller devices.
5. A SCADA monitoring system based on a hybrid cloud architecture according to claim 1, characterized in that the network security device is a forward isolation device or a firewall gateway.
6. A SCADA monitoring system based on a hybrid cloud architecture according to claim 1, characterized in that the mobile terminal is a mobile phone, a tablet or a notebook.
7. A SCADA monitoring system based on a hybrid cloud architecture as claimed in claim 1 wherein the PDA device is communicatively connected with the cloud controller device via wifi or Bluetooth.
8. A SCADA monitoring system based on a hybrid cloud architecture as described in claim 7 wherein the PDA device has access to a specified cloud controller device.
9. A monitoring method of a SCADA monitoring system based on a hybrid cloud architecture according to any of the claims 1 to 8, characterized by comprising the following steps:
acquiring data of industrial equipment, transmitting the data to a front communication server on a private cloud platform and storing the data in a private database;
the prepositive communication server forwards the data to a public cloud platform, stores the data in a public database and provides an application server for access query;
and if the mobile terminal receives the alarm information pushed by the application server, the PDA device is used for being in communication connection with the cloud controller device so as to control the industrial device connected with the cloud controller device.
10. A monitoring method of a SCADA monitoring system based on a hybrid cloud architecture as claimed in claim 9, wherein when transmitting the obtained data of the industrial equipment to the front communication server on the private cloud platform, the following transmission method is adopted:
setting a fixed transmission period for the steady-state scene data in a periodic transmission mode;
the method comprises the steps that an instant uploading mode is adopted for burst data of a transient scene, and data of abnormal alarm, remote signaling deflection and fixed value adjustment events are uploaded to a front-end communication server in an instant mode;
for an unstable communication link scene, data is stored in a local nonvolatile storage medium of the cloud controller, and after the link is recovered to be stable, the data stored in the local is transmitted.
CN202110836794.5A 2021-07-23 2021-07-23 SCADA monitoring system and method based on hybrid cloud framework Pending CN113504755A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116800752A (en) * 2023-07-11 2023-09-22 无锡隆云数字技术有限公司 Distributed public cloud deployment system and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106227132A (en) * 2016-08-30 2016-12-14 广州穗剑实验室科技有限公司 A kind of laboratory cloud monitor supervision platform and laboratory monitoring method
CN108491164A (en) * 2018-03-22 2018-09-04 上海精鲲计算机科技有限公司 A kind of mixed cloud storage architecture system
CN108696565A (en) * 2017-04-06 2018-10-23 北京算云联科科技有限公司 Integrated digital home control system based on mixed cloud and isomery Internet of Things
CN113014847A (en) * 2021-01-27 2021-06-22 广州佰锐网络科技有限公司 Method and system for realizing audio and video communication based on hybrid cloud architecture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106227132A (en) * 2016-08-30 2016-12-14 广州穗剑实验室科技有限公司 A kind of laboratory cloud monitor supervision platform and laboratory monitoring method
CN108696565A (en) * 2017-04-06 2018-10-23 北京算云联科科技有限公司 Integrated digital home control system based on mixed cloud and isomery Internet of Things
CN108491164A (en) * 2018-03-22 2018-09-04 上海精鲲计算机科技有限公司 A kind of mixed cloud storage architecture system
CN113014847A (en) * 2021-01-27 2021-06-22 广州佰锐网络科技有限公司 Method and system for realizing audio and video communication based on hybrid cloud architecture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116800752A (en) * 2023-07-11 2023-09-22 无锡隆云数字技术有限公司 Distributed public cloud deployment system and method
CN116800752B (en) * 2023-07-11 2024-01-30 无锡隆云数字技术有限公司 Distributed public cloud deployment system and method

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Application publication date: 20211015