CN218276090U

CN218276090U - Distributed power supply multi-mode intelligent controller

Info

Publication number: CN218276090U
Application number: CN202222199886.XU
Authority: CN
Inventors: 翁利国; 余彬; 周国华; 罗曼; 练德强; 洪达; 朱小炜; 严建伟; 丁超迪; 黄栋燕
Original assignee: State Grid Zhejiang Xiaoshan District Power Supply Co ltd; Zhejiang Zhongxin Electric Power Engineering Construction Co Ltd
Current assignee: State Grid Zhejiang Xiaoshan District Power Supply Co ltd; Zhejiang Zhongxin Electric Power Engineering Construction Co Ltd
Priority date: 2022-08-20
Filing date: 2022-08-20
Publication date: 2023-01-10
Anticipated expiration: 2032-08-20

Abstract

The utility model relates to a new forms of energy electric wire netting operation control technique aims at providing a distributed generator multi-mode intelligent control ware. The product comprises a controller shell, wherein a main circuit board is arranged in the controller shell, and a metering and data acquisition module, a grid-connected detection module, an electric energy quality detection module, a multi-mode control module and a distributed power supply communication module are arranged on the main circuit board; the metering and data acquisition module is respectively and electrically connected with the grid-connected detection module, the electric energy quality detection module and a wiring terminal arranged on the shell; the grid-connected detection module, the multi-mode control module and the distributed power supply communication module are electrically connected in sequence, and the electric energy quality detection module is electrically connected with the distributed power supply communication module; the distributed power supply communication module is electrically connected with a wiring terminal arranged on the shell. The product realizes equipment integration, and greatly reduces the overall construction cost; the problems of control failure, calculation misalignment and the like caused by network communication failure or data packet loss can be avoided.

Description

Distributed power supply multi-mode intelligent controller

Technical Field

The utility model relates to a new forms of energy electric wire netting operation control technique, concretely relates to distributed generator multi-mode intelligent control ware.

Background

At present, the increasingly serious environmental energy problem becomes a focus of attention of all countries, and the development of a distributed power supply taking new energy as a main body becomes an important point of effort for solving the energy crisis and realizing low-carbon development. However, new energy represented by photovoltaic and wind power has the defects of strong fluctuation, unstable output and the like, and along with the gradual increase of the permeability of the new energy in a power grid, the serious challenge is brought to the stable operation of the traditional power grid, and a novel power distribution network is constructed, so that the energy is reasonably, efficiently and environmentally used.

A large number of distributed power sources are connected, the radial structure of a traditional power distribution network is deeply changed, the power distribution network tends to be diversified and bidirectional, and planning and control of the power distribution network are particularly important. Due to the access of the distributed power supply, the power flow direction of the power distribution network is changed from unidirectional flow to bidirectional flow, new challenges are brought to the stabilization of the voltage of a grid-connected point and the control of the power factor of the grid-connected point, unreasonable control strategies and control methods can cause the voltage of the grid-connected point to cross the border, and further serious problems such as power supply quality influence and even large-scale power failure are caused. For a power distribution network mainly including a distributed power supply, a control method generally adopted in the prior art mainly includes a master-slave control method, a peer-to-peer control method, and the like. The control methods depend on a cloud platform or a local server, and if a host fails, large-scale output faults of the distributed power supply can be caused, and problems such as control failure and the like can be caused.

Therefore, the local intelligent regulator is used for controlling the distribution network mainly comprising the distributed power supply, and has important practical significance for the operation of the new energy power grid.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is, overcome not enough among the prior art, provide a distributed generator multi-mode integrated control's intelligent modulator.

For solving the technical problem, the utility model discloses a concrete solution is:

the distributed power supply multi-mode intelligent controller comprises a controller shell, wherein a main circuit board is arranged in the controller shell, and a metering and data acquisition module, a grid connection detection module, an electric energy quality detection module, a multi-mode control module and a distributed power supply communication module are arranged on the main circuit board; the metering and data acquisition module is respectively and electrically connected with the grid-connected detection module, the electric energy quality detection module and a wiring terminal arranged on the shell; the grid-connected detection module, the multi-mode control module and the distributed power supply communication module are electrically connected in sequence, and the electric energy quality detection module is electrically connected with the distributed power supply communication module; the distributed power supply communication module is electrically connected with a wiring terminal arranged on the shell.

As an improved scheme, the metering and data acquisition module is respectively connected with the grid-connected detection module and the electric energy quality detection module through Ethernet; the grid-connected detection module, the multi-mode control module and the distributed power supply communication module are electrically connected through an RS485 interface and a cable in sequence; the electric energy quality detection module is electrically connected with the distributed power supply communication module through an RS485 interface and a cable.

As an improved scheme, the connection terminal electrically connected with the metering and data acquisition module is further connected to a voltage current transformer arranged at a public connection point and a grid connection point through an ethernet for acquiring voltage, current and frequency information of a power grid.

As an improved scheme, the connection terminal electrically connected with the distributed power supply communication module is further connected to an inverter controller arranged in each distributed power generation unit in the distributed power supply through a CAN bus, and is used for transmitting operation control parameters for the inverter.

As an improvement scheme, all the modules are single chip chips welded on the main circuit board.

As an improvement scheme, a man-machine conversation device with display and input functions is arranged on a controller shell, and the man-machine conversation device is connected to the multi-mode control module through a signal line.

As a modification, the man-machine interaction device is a touch screen with an input function, or a liquid crystal display and keyboard assembly.

As an improved scheme, the distributed power supply comprises a plurality of groups of distributed power generation units which are respectively connected to a power grid bus through power electronic devices; the distributed power generation unit comprises an energy storage device and photovoltaic or wind power generation equipment.

As a refinement, the energy storage device is any one of the following: the energy storage device comprises a storage battery, a water pumping energy storage device, a flywheel energy storage device, a compressed air energy storage device or a super capacitor energy storage device.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses to need the control calculation work that many (cover) equipment such as local computer, high in the clouds control platform were accomplished originally, whole integration has realized that equipment integrates in a single equipment, greatly reduces the overall construction cost.

2. The utility model discloses with the control system that originally needs pass through network transmission calculation data, simplify to the integrated equipment that can realize calculation and control locally, greatly avoided because the control that the network communication trouble leads to is out of order, also avoid because the calculation that reasons such as data package lost among the remote signal transmission process lead to misalign the scheduling problem.

3. The utility model discloses can utilize the local man-machine dialogue equipment of taking certainly to accomplish the control parameter input, consequently greatly promote the flexibility that local staff carried out control to the equipment operation, conveniently operate to the field device operation situation.

4. The utility model has simple structure, and only needs to adopt a commercially available singlechip and a circuit board to carry out equipment assembly; the device has no special requirements on the appearance structure of the device, so the manufacturing cost is low.

5. The utility model discloses used each module utilizes current open ripe calculation method or control technique to carry out the program write in of singlechip, does not need to carry out intelligent control's design very much, and technical staff in the art can select to be suitable for in prior art according to distributed generator's actual conditions. Therefore, the utility model discloses the application is nimble various, and is convenient for polymorphic type, standardization, streamlined production.

6. In view of the utility model discloses an use the flexibility, can adopt the controller of built-in different control strategy module to carry out the on-the-spot deployment to different distributed generator based on the whole net information to realize the interactive support between the distributed generator, improve the stability and the intellectuality that use distributed generator to be the little electric wire netting operation of main part.

Drawings

FIG. 1 is a schematic diagram of a distributed power multi-mode intelligent controller.

Detailed Description

It should be noted that the present invention relates to computer control technology. The utility model discloses an in the implementation process, can involve the application of embedded software's functional module. The applicant believes that, after having read this application for patent, and having fully understood the principles and objects of the invention, it is fully possible for a person skilled in the art, in combination with the prior art, to utilize the software programming skills he grasps to implement the invention. The aforementioned functional modules include but are not limited to: measurement and data acquisition module, grid-connected detection module, electric energy quality detection module, multi-mode control module and distributed power source communication module etc. all, the fan the utility model discloses what application file mentioned all belongs to this category.

For example, the metering and data collecting module may refer to the implementation manner of chinese patent application CN104819914A, CN114865797A, CN114844221A, CN114878198a and other documents; the grid-connected detection module can refer to the implementation mode of documents such as Chinese patent application CN110410160A, CN104682566A and the like; the power quality detection module can refer to the implementation mode of documents such as Chinese patent application CN111525584A, CN112230094A, CN110994609A, CN109001577A and the like; the multi-mode control module can refer to the implementation mode of documents such as Chinese patent application CN112994470A, CN113107798A, CN113193758A, CN113872730A, CN114162216A and the like; the distributed power supply communication module can refer to the implementation mode of documents such as Chinese patent application CN114865614A, CN114548837A, CN114709810A, CN114827195A, CN114221340A and the like; the multi-mode control module can realize comprehensive coordination control by using three control modes of PQ control, VF control and droop control, and the control method can refer to the implementation mode of documents such as CN113452093A, CN113364324A, CN113629713A, CN113725854A, CN114336952A, CN114512998A, CN114844062A and the like. The above documents all belong to the publications in the field of distributed power supply or ac/dc power supply and distribution, and provide the implementation schemes of each functional module from various angles, thus belonging to the prior art which is well known to those skilled in the art. Therefore, the contents such as the implementation manner of the calculation and control of each functional module, the software implementation process, etc. do not belong to the contents that must be recorded in the present invention. And, the innovation of the utility model is that the function modules which are originally used independently are organically combined and connected, and the realization process of the related calculation or control method does not belong to the protection scope of the utility model.

Furthermore, those skilled in the art will appreciate that, in addition to implementing portions of the systems and their various devices, modules, units in purely computer-readable program code, the present invention provides systems and their various devices, modules, units in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, and the like that implement substantially the same functionality as the method steps are logically programmed. Therefore, the system and the devices, modules and units thereof provided by the present invention can be regarded as a hardware component, and the devices, modules and units included therein for implementing various functions can also be regarded as structures in the hardware component; means, modules, units for performing the various functions may also be regarded as structures within both software modules and hardware components for performing the method.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention and are not intended to limit the present invention.

As an application scenario of the utility model, the distributed power supply includes a plurality of groups of distributed generation units (DG) which are respectively connected to the power grid bus through the power electronic devices; wherein the distributed generation unit (DG) comprises an energy storage device and a photovoltaic or wind power generation device. The energy storage device is any one of the following: the energy storage device comprises a storage battery, a water pumping energy storage device, a flywheel energy storage device, a compressed air energy storage device or a super capacitor energy storage device.

As shown in fig. 1, the distributed power multi-mode intelligent controller of the present invention comprises a controller housing (not shown in the figure), a main circuit board (shown by dotted line) is arranged inside the controller housing, and a metering and data collecting module, a grid connection detecting module, an electric energy quality detecting module, a multi-mode control module and a distributed power communication module are arranged on the main circuit board; the metering and data acquisition module is respectively and electrically connected with the grid-connected detection module, the electric energy quality detection module and a wiring terminal arranged on the shell; the grid-connected detection module, the multi-mode control module and the distributed power supply communication module are electrically connected in sequence, and the electric energy quality detection module is electrically connected with the distributed power supply communication module; the distributed power supply communication module is electrically connected with a wiring terminal arranged on the shell. The concrete connection mode is as follows: the metering and data acquisition module is respectively connected with the grid-connected detection module and the electric energy quality detection module through the Ethernet; the grid-connected detection module, the multi-mode control module and the distributed power supply communication module are electrically connected through the RS485 interface and the cable in sequence, the electric energy quality detection module is electrically connected with the distributed power supply communication module through the RS485 interface and the cable, and communication protocols such as Modbus and IEC103 are supported. The wiring terminal electrically connected with the metering and data acquisition module is also connected to a voltage current transformer arranged at a public connection point and a grid connection point through the Ethernet and is used for acquiring voltage, current and frequency information of a power grid. And the wiring terminal is electrically connected with the distributed power supply communication module, is also connected to an inverter controller arranged in each distributed power generation unit in the distributed power supply through a CAN bus, and is used for transmitting operation control parameters aiming at the inverter.

As an optional example, the voltage current transformer adopts a product of type 7UT6125-5EB21-1AA0 of Siemens company which is a commercial product, and is connected with the metering and data acquisition module through an Ethernet through a VGA conversion interface. The information acquisition mode comprises remote signaling and remote measuring; the remote signaling description semaphore comprises signals such as a public connection point switch position signal and an operation state signal, and the remote signaling description measurement semaphore comprises information such as voltage, frequency and power of a grid-connected point and a public connection point.

The modules are all single chip microcomputer chips welded on the main circuit board, a commercial product STM32F103 single chip microcomputer can be adopted, and software modules for realizing respective functions are respectively loaded in CPUs of the single chip microcomputer chips. The metering and data acquisition module is used for receiving the electrical information of each DG and the operation state of a bus side power grid; the grid connection detection module is used for detecting the on-off state of the public connection point; the electric energy quality detection module is used for calculating the electric information (such as power factor, voltage and current harmonic content and the like) of the current power distribution network and reflecting the operation condition of the power distribution network; the multi-mode control module is used as a core module, and different control strategies (such as PQ control, VF control, droop control and the like) of the DGs are calculated and selected by utilizing the electrical information of the DGs and the operation state of a power grid at the bus side to obtain corresponding power reference values so as to realize the monitoring, calculating and controlling functions; and the distributed power supply communication module is used for receiving the instruction of the multi-mode control module and sending the instruction to the corresponding DG inverter controller.

And a man-machine dialogue device connected to the multi-mode control module through a signal line is arranged on the controller shell and used for inputting control parameters. As alternative examples, the human-machine interaction device is a touch screen with an input function, or a liquid crystal display and keyboard assembly.

Based on the utility model discloses a distributed generator multi-mode intelligent control ware's application, distributed generator can carry out the control mode according to the control parameter work of settlement and select. The multi-mode control module is used as a core module in the controller, and can calculate corresponding power reference values by adopting different control strategies for different distributed power supplies according to the operation state of the microgrid, so that the voltage and the frequency of the microgrid are ensured to be stable. The utility model discloses need not high in the clouds control platform or organize control server in addition, can realize the control strategy with the mode that local acquisition data and calculation and select, reduce the control complexity of dc-to-ac converter, be favorable to realizing the modularization and the standardization of local control. The operation reliability and stability of the micro-grid system are further improved while the coordination among different distributed power supplies is improved.

Claims

1. A distributed power supply multi-mode intelligent controller is characterized by comprising a controller shell, wherein a main circuit board is arranged in the controller shell, and a metering and data acquisition module, a grid-connected detection module, an electric energy quality detection module, a multi-mode control module and a distributed power supply communication module are arranged on the main circuit board; the metering and data acquisition module is respectively and electrically connected with the grid-connected detection module, the electric energy quality detection module and a wiring terminal arranged on the shell; the grid-connected detection module, the multi-mode control module and the distributed power supply communication module are electrically connected in sequence, and the electric energy quality detection module is electrically connected with the distributed power supply communication module; the distributed power supply communication module is electrically connected with a wiring terminal arranged on the shell.

2. The distributed power multi-mode intelligent controller according to claim 1, wherein the metering and data collecting module is respectively connected with the grid-connected detection module and the power quality detection module through Ethernet; the grid-connected detection module, the multi-mode control module and the distributed power supply communication module are electrically connected through the RS485 interface and the cable in sequence; the electric energy quality detection module is electrically connected with the distributed power supply communication module through an RS485 interface and a cable.

3. The distributed power multi-mode intelligent controller according to claim 1, wherein the connection terminal electrically connected to the metering and data collecting module is further connected to a voltage current transformer provided at a common connection point and a grid connection point through an ethernet for obtaining voltage, current and frequency information of a power grid.

4. The distributed power multi-mode intelligent controller according to claim 1, wherein the connection terminals electrically connected to the distributed power communication module are further connected to an inverter controller provided in each distributed power generation unit in the distributed power through a CAN bus, and configured to transmit operation control parameters for the inverter.

5. The distributed power multi-mode intelligent controller according to claim 1, wherein each module arranged on the main circuit board is a single chip microcomputer chip welded on the main circuit board.

6. The distributed power multimode intelligent controller of claim 1, wherein a human-machine dialogue device with display and input functions is provided on the controller housing, and the human-machine dialogue device is connected to the multimode control module through a signal line.

7. The distributed power multi-mode intelligent controller of claim 6, wherein the human-machine interaction device is a touch screen with input function or a liquid crystal display and keyboard assembly.

8. The distributed power multi-mode intelligent controller according to claim 1, wherein the distributed power comprises a plurality of groups of distributed power generation units, which are respectively connected to a power grid bus through power electronic devices; the distributed power generation unit comprises an energy storage device and photovoltaic or wind power generation equipment.

9. The distributed power multi-mode intelligent controller of claim 8, wherein the energy storage device is any one of: the energy storage device comprises a storage battery, a water pumping energy storage device, a flywheel energy storage device, a compressed air energy storage device or a super capacitor energy storage device.