CN112366718A - Island micro-grid lean coordination control method based on load precise control - Google Patents
Island micro-grid lean coordination control method based on load precise control Download PDFInfo
- Publication number
- CN112366718A CN112366718A CN202011161518.5A CN202011161518A CN112366718A CN 112366718 A CN112366718 A CN 112366718A CN 202011161518 A CN202011161518 A CN 202011161518A CN 112366718 A CN112366718 A CN 112366718A
- Authority
- CN
- China
- Prior art keywords
- load
- grid
- micro
- control
- user
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
-
- 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses an island micro-grid lean coordination control method based on accurate load control, which comprises the following steps of: step A: the method comprises the steps that a server obtains real-time remote measurement remote signaling data of a micro-grid, and simultaneously obtains current in a user precision load controller, internal feeder current and active power data of a load; and B: and B, the server synchronously acquires the data of the two aspects in the step A, the load centralized control calculation of the micro-grid is carried out, a micro-grid accurate load scheme is obtained, and the user accurate load controller controls the related line switches to carry out load shedding control. The invention has the advantages that: the load control method has the advantages that the over-cut amount of the micro-grid system can be effectively reduced, the economical efficiency of load control is improved, meanwhile, the electricity utilization safety can be remotely monitored and managed, the loads with lower priorities can be cut off according to the actual electricity utilization situation and the user-defined load priorities, the user demands of more users are guaranteed, and the safe and economic operation of the grid system is realized.
Description
Technical Field
The invention relates to a sea island microgrid lean coordination control method based on load precise control.
Background
The load control of the island microgrid is a means for ensuring the safe and stable operation of the island microgrid, and the intelligent construction of the accurate load control system of the island microgrid plays a positive role in the energy efficiency management of the island microgrid. The core idea of island microgrid load management is as follows: on the premise of ensuring important load, the efficiency gives priority to fairness. The island micro-grid can be connected with a main grid and can also run independently, and when the grid fails, the island mode can improve the reliability of a power system. In order to improve the safety and stability of the power grid, the control strategy of the load shedding of the island micro-power grid is particularly important.
When a traditional micro-grid executes a control strategy to carry out load shedding, a 10kV outgoing line is mostly directly cut off, so that the phenomenon of load over-shedding is easily caused, and the stable and reliable operation of the micro-grid is not facilitated. In order to ensure that the micro-grid is more economical, stable and reliable in operation, an accurate load control system is built on the island, an accurate load control terminal is installed on a user side, the accurate load control concept is actively integrated into a micro-grid control strategy, the load shedding control of the micro-grid is deeply carried out in the user, and the load shedding amount is refined. The functions of constant power control of a tie line under the condition of grid connection of the micro-grid, stable control under the condition of off-grid operation, switching control of on-grid and off-grid operation modes and the like are optimized, and the operation state of the island micro-grid is accurately mastered.
Disclosure of Invention
The invention aims to provide a sea island microgrid lean coordination control method based on accurate load control, which can effectively solve the problem that the existing microgrid control is easy to have load over-cut.
In order to solve the technical problems, the invention is realized by the following technical scheme: the sea island microgrid lean coordination control method based on accurate load control comprises the following steps:
step A: the method comprises the steps that a server obtains real-time remote measurement remote signaling data of a micro-grid, and simultaneously obtains current in a user precision load controller, internal feeder current and active power data of a load;
and B: and B, the server synchronously acquires the data of the two aspects in the step A, the load centralized control calculation of the micro-grid is carried out, a micro-grid accurate load scheme is obtained, and the user accurate load controller controls the related line switches to carry out load shedding control.
Preferably, in the step a, the real-time telemetering and remote signaling data of the microgrid is acquired through an interface with the dispatching automation SCADA system.
Preferably, in the step a, the server acquires the current in the user precision load controller, the internal feeder current, and the active power data of the load in a wireless manner through the microgrid communication network.
Preferably, the specific steps of step B are:
step B1: determining the whole-network online load node of the microgrid and the importance level of the load through a user precision load controller;
step B2: b, judging whether a tie line constant power control mode under the current grid-connected condition or a stable control mode under the off-grid operation condition according to the data obtained in the step A, and calculating the total load amount to be cut or input by the whole network;
step B3: calculating a weight coefficient according to the importance level of the load, and when the total amount of the load needs to be cut off, cutting off the load by an intelligent circuit switch in priority if the weight coefficient is lower; when the total load needs to be input, the intelligent circuit switch is switched on to increase the load preferentially with a high weight coefficient.
Compared with the prior art, the invention has the advantages that: the invention realizes the sea island micro-grid lean coordination control method based on the load precise control on the basis of the micro-grid dispatching automation SCADA system and the micro-grid communication system. The load control method has the advantages that the over-cut amount of the micro-grid system can be effectively reduced, the economical efficiency of load control is improved, meanwhile, the electricity utilization safety can be remotely monitored and managed, the loads with lower priorities can be cut off according to the actual electricity utilization situation and the user-defined load priorities, the user demands of more users are guaranteed, and the safe and economic operation of the grid system is realized.
Drawings
Fig. 1 is a flowchart of an island microgrid lean coordination control method based on load precise control.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 1, the embodiment of the sea-island microgrid lean coordination control method based on accurate load control according to the present invention, the sea-island microgrid lean coordination control method based on accurate load control includes the following steps:
step A: the method comprises the steps that a server obtains real-time remote measurement remote signaling data of a micro-grid through an interface with a dispatching automation SCADA system, and the server obtains current in a user precision load controller, current of an internal feeder line and active power data of a load in a wireless mode through a micro-grid communication network;
and B: and B, the server synchronously acquires the data of the two aspects in the step A, the load centralized control calculation of the micro-grid is carried out, a micro-grid accurate load scheme is obtained, and the user accurate load controller controls the related line switches to carry out load shedding control.
The step B comprises the following specific steps:
step B1: determining the whole-network online load node of the microgrid and the importance level of the load through a user precision load controller;
step B2: b, judging whether a tie line constant power control mode under the current grid-connected condition or a stable control mode under the off-grid operation condition according to the data obtained in the step A, and calculating the total load amount to be cut or input by the whole network;
step B3: calculating a weight coefficient according to the importance level of the load, and when the total amount of the load needs to be cut off, cutting off the load by an intelligent circuit switch in priority if the weight coefficient is lower; when the total load needs to be input, the intelligent circuit switch is switched on to increase the load preferentially with a high weight coefficient.
The island micro-grid precise load control system comprises a system server, a user precise load controller, an intelligent line switch and the like. The server is respectively connected with the user accurate load controller through a micro-grid communication network, and the user accurate load controller is connected with the intelligent circuit switch through the micro-grid communication network.
The server of the micro-grid precise load control system comprises a data acquisition and processing module, a load centralized control strategy algorithm module and a communication interface. Data of a server are acquired from two aspects, namely, real-time telemetering and remote signaling data of a micro-grid are acquired through a dispatching automation SCADA system interface (standard 104), and on the other hand, data such as current in a user accurate load controller, internal feeder current and active power of a load are acquired through a micro-grid communication network (wireless mode). The server synchronously acquires data of two aspects, carries out load centralized control calculation of the micro-grid to obtain a micro-grid accurate load scheme, and can control related line switches to carry out load shedding control through the user accurate load controller.
The user precision load controller comprises a data acquisition and processing module, a load management module, a communication interface and a WiFi communication module, wherein the data acquisition and processing module of the user precision load controller is used for acquiring the current of a user load and calculating the active power of the user load; the load control strategy algorithm module of the user precise load controller is used for closing the intelligent circuit switch with low priority level under the condition that the load quota is not exceeded according to the load quota issued by the precise load control system server and the user-defined load priority level; and a communication interface of the user precision load controller is connected with a communication interface of the precision load control system server through the micro-grid communication network.
The user load management module comprises a user authentication interface and a communication interface, can configure the priority of the load, defines the electrical load and the maximum load connected on each line, and controls the on/off state of the intelligent line switch. The communication interface adopts an Ethernet interface or a wireless Zigbee interface.
The intelligent circuit switch comprises an air switch, a relay and a data acquisition and processing module, wherein the relay is connected with the air switch and used for automatically controlling the opening/closing of the air switch.
The micro-grid accurate load control system further comprises an uninterruptible power supply and a wireless router, wherein the uninterruptible power supply is used for ensuring normal work of a relay of the intelligent line switch and the wireless router under the condition that the external power supply has power failure, and the wireless router is used for providing a connecting channel with external communication for the user accurate load controller.
The precise load control strategy of the island microgrid carries out load control by using the principle of a load importance weight coefficient method.
The detailed load shedding process of the micro-grid comprises the following steps:
1. and defining the online load nodes of the whole microgrid and the importance level of the load through a user precision load controller.
2. And acquiring the whole network load data of the micro-grid through the main network SCADA system and the micro-grid communication network, judging whether the current network is a connecting line constant power control mode under the grid-connected condition or a stable control mode under the off-grid operation condition, and calculating the total load amount of the whole network to be cut.
3. And (4) calculating a weight coefficient (parameters such as load importance and load running time) according to the load importance level, wherein the lower the weight coefficient, the load is cut off by the intelligent line switch. And (4) sequencing the load to be cut off until the total amount to be cut off is reached by calculating the variable of the load to be cut off and the total amount of the load to be cut off.
In the same principle, load throwing can also be performed by calculating the total amount of required load throwing and sorting the load throwing according to the priority of the weight coefficient, and the load throwing with the high weight coefficient is preferably thrown.
The invention realizes the sea island micro-grid lean coordination control method based on the load precise control on the basis of the micro-grid dispatching automation SCADA system and the micro-grid communication system. The method can effectively reduce the load over-cut rate and the load over-cut rate fluctuation, and greatly improves the safety and the economical efficiency of the power grid for controlling the load. The method carries out priority division on the electric equipment according to the electric load of each electric equipment of a user; when the load is cut, the path between the branch connected with the electric equipment with lower priority and the transmission line is cut off preferentially until the cut-off electric load meets the load cutting requirement. The method has the advantages that the blind removal of the user load is avoided, the accurate removal of the load is realized, the accidental removal of the important load without discrimination in the traditional 'one-cutting' removal mode is avoided, the user requirements of more users are ensured, the processing speed and capacity of the power grid facing to the emergency are effectively improved, and the safety and economic operation of the power grid are effectively guaranteed. Meanwhile, the remote monitoring and management of the power utilization safety can be realized, the centralized monitoring, the centralized management and the centralized control are carried out on each power utilization load in the power grid, the work load of power grid maintenance personnel is reduced, and meanwhile, the management level of the power grid management personnel on the lean coordination control of the load accurate control micro-grid is improved.
The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.
Claims (4)
1. The sea island microgrid lean coordination control method based on accurate load control is characterized by comprising the following steps: the method comprises the following steps:
step A: the method comprises the steps that a server obtains real-time remote measurement remote signaling data of a micro-grid, and simultaneously obtains current in a user precision load controller, internal feeder current and active power data of a load;
and B: and B, the server synchronously acquires the data of the two aspects in the step A, the load centralized control calculation of the micro-grid is carried out, a micro-grid accurate load scheme is obtained, and the user accurate load controller controls the related line switches to carry out load shedding control.
2. The method for finely coordinating and controlling the island microgrid based on load precise control of claim 1, wherein: and in the step A, acquiring real-time remote measurement and remote signaling data of the microgrid through an interface with a dispatching automation SCADA system.
3. The method for finely coordinating and controlling the island microgrid based on load precise control of claim 1, wherein: in the step A, the server acquires the current in the user precision load controller, the current of the internal feeder line and the active power data of the load in a wireless mode through a micro-grid communication network.
4. The method for finely coordinating and controlling the island microgrid based on load precise control of claim 1, wherein: the concrete steps of the step B are as follows:
step B1: determining the whole-network online load node of the microgrid and the importance level of the load through a user precision load controller;
step B2: b, judging whether a tie line constant power control mode under the current grid-connected condition or a stable control mode under the off-grid operation condition according to the data obtained in the step A, and calculating the total load amount to be cut or input by the whole network;
step B3: calculating a weight coefficient according to the importance level of the load, and when the total amount of the load needs to be cut off, cutting off the load by an intelligent circuit switch in priority if the weight coefficient is lower; when the total load needs to be input, the intelligent circuit switch is switched on to increase the load preferentially with a high weight coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011161518.5A CN112366718A (en) | 2020-10-27 | 2020-10-27 | Island micro-grid lean coordination control method based on load precise control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011161518.5A CN112366718A (en) | 2020-10-27 | 2020-10-27 | Island micro-grid lean coordination control method based on load precise control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112366718A true CN112366718A (en) | 2021-02-12 |
Family
ID=74510612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011161518.5A Pending CN112366718A (en) | 2020-10-27 | 2020-10-27 | Island micro-grid lean coordination control method based on load precise control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112366718A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683469A (en) * | 2023-05-10 | 2023-09-01 | 国网河北省电力有限公司邯郸供电分公司 | Load shedding method, device and system of power grid dispatching system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116809A (en) * | 2015-09-10 | 2015-12-02 | 国电南京自动化股份有限公司 | User customizable intelligent micro grid load control system and method |
| US20180316187A1 (en) * | 2017-04-28 | 2018-11-01 | Lsis Co., Ltd. | Hierarchical type power control system |
| CN111682588A (en) * | 2020-06-22 | 2020-09-18 | 海南金盘智能科技股份有限公司 | Microgrid system control method and microgrid system controller |
-
2020
- 2020-10-27 CN CN202011161518.5A patent/CN112366718A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116809A (en) * | 2015-09-10 | 2015-12-02 | 国电南京自动化股份有限公司 | User customizable intelligent micro grid load control system and method |
| US20180316187A1 (en) * | 2017-04-28 | 2018-11-01 | Lsis Co., Ltd. | Hierarchical type power control system |
| CN111682588A (en) * | 2020-06-22 | 2020-09-18 | 海南金盘智能科技股份有限公司 | Microgrid system control method and microgrid system controller |
Non-Patent Citations (1)
| Title |
|---|
| 李鹏等: "多微网多并网点结构微网设计和模式切换控制策略", 《电力系统自动化》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683469A (en) * | 2023-05-10 | 2023-09-01 | 国网河北省电力有限公司邯郸供电分公司 | Load shedding method, device and system of power grid dispatching system |
| CN116683469B (en) * | 2023-05-10 | 2024-04-26 | 国网河北省电力有限公司邯郸供电分公司 | Load shedding method, device and system of power grid dispatching system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102694381B (en) | Multistage electrical-network self-healing control method | |
| CN101594002B (en) | Self-healing control method for operation of urban distribution network | |
| CN106505551A (en) | A kind of light storage DC power-supply system based on cooperative control device | |
| CN105116809A (en) | User customizable intelligent micro grid load control system and method | |
| CN110460154A (en) | Energy storage station cooperation control system of power framework | |
| CN104052078A (en) | Regulation and control method and system for switching grid-connected operation mode to island operation mode of microgrid | |
| CN103199529A (en) | IEC61850 standard-based microgrid comprehensive coordination control framework | |
| CN106160229A (en) | A kind of customer charge real-time control method and system | |
| CN104734352A (en) | Loop closing operation control method for power distribution line | |
| CN210780230U (en) | Switch device for switching high power from off-grid to grid-connected | |
| CN104283222A (en) | Regional power grid reactive voltage control system | |
| CN114744754B (en) | Island-preventing operation control system and method applying low-voltage transformer area distributed photovoltaic access | |
| CN102638096A (en) | Wireless monitoring system based on General Packet Radio Service (GPRS) for distributing transformer | |
| CN112366718A (en) | Island micro-grid lean coordination control method based on load precise control | |
| CN112448418B (en) | Water and electricity microgrid and power adjusting method thereof | |
| CN113794285A (en) | Intelligent flexible regulation and control method for agricultural motor-pumped well cluster | |
| CN112421769A (en) | Intelligent remote monitoring system for communication power supply equipment | |
| CN112713597A (en) | Device and method for coordinating and controlling power distribution of two low-voltage transformer areas | |
| Ding et al. | Slice network framework and use cases based on FlexE technology for power services | |
| CN102185372A (en) | Method and device for generating backup automatic switchover control model based on EMS (energy management system) | |
| CN209215930U (en) | A kind of industrial rectifier power source numerical control system based on Internet of Things | |
| CN116646916A (en) | Base station power response management method and system for power grid load change | |
| CN113300465B (en) | Intelligent interaction system and method for network load of receiving end power grid | |
| CN104201696A (en) | Integrated intelligent control method for multifunctional network type transformer area | |
| CN209881494U (en) | Intelligent low-voltage photovoltaic anti-reverse power transmission monitoring control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210212 |