Design method and system of energy management system for microgrid in areas with high proportion of new energy

Abstract

The present invention relates to a field of new energy control technology, and is a design method and system for a microgrid energy management system in areas with a high proportion of new energy. The former includes setting a data acquisition and transmission layer, setting an IEMP controller and a communication interface corresponding to each functional device in different subsystems in the smart microgrid, and connecting with each functional device; setting a local monitoring layer of the power station to realize data storage and visualization; setting a central remote monitoring layer, communicating with the local monitoring layer of the power station, storing received data, and providing remote monitoring analysis. The present invention can realize the energy and power coordination management function of different locations such as photovoltaic, wind power, energy storage, power grid, and user load in the smart microgrid, and is compatible with wind power generation, photovoltaic power generation, electrochemical energy storage system, city power, power load and other energy types to carry out information collection, status monitoring, energy management, safe operation and maintenance, etc. in the off-grid / on-grid mode of generation, transmission, distribution, storage and use, effectively improving the new energy consumption capacity and improving the quality of electric energy.

Description

Technical Field

[0001] The present invention relates to the field of new energy control technology, and is a design method and system for a microgrid energy management system in areas with a high proportion of new energy. Background Art

[0002] In areas where new energy accounts for a high proportion, the installed capacity of new energy represented by photovoltaic power generation and wind power generation has grown rapidly, resulting in the total installed capacity of the power grid far exceeding the power load, and the peak-shaving capacity of the power grid is declining, especially in winter when the peak-shaving pressure is more prominent, resulting in serious wind and solar power abandonment. At present, electrochemical energy storage is an effective technical subject to solve the peak-shaving pressure of the power grid and the wind and solar power abandonment in areas where new energy accounts for a high proportion. However, there is no corresponding platform applied to the generation, transmission, distribution, and use of smart microgrids, and it can achieve the matching of source-grid-load-storage in time and space in the off-grid / grid-connected operation mode, reduce the wind and solar power abandonment rate, and increase the wind and solar energy absorption capacity. Summary of the invention

[0003] The present invention provides a method and system for designing a microgrid energy management system in areas with a high proportion of new energy, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that there is no energy management system that can be used for the generation, transmission, distribution and use of smart microgrids in areas with a high proportion of new energy.

[0004] One of the technical solutions of the present invention is achieved through the following measures: A design method for a microgrid energy management system in a region with a high proportion of new energy, comprising:

[0005] Set up a data acquisition and transmission layer, set up an IEMP controller and communication interfaces corresponding to each functional device in different subsystems within the smart microgrid, and connect with each functional device;

[0006] Count the number of different types of communication interfaces, configure one or more IEMP controllers accordingly, configure the communication point table of each functional device according to its communication interface and communication protocol, and configure the communication settings of the functional device according to its communication protocol;

[0007] According to the functions of each functional device, determine the corresponding monitoring, alarm, protection methods and rules, and combine the working status parameters of each functional device to determine the protection control and energy management control methods and rules of the smart microgrid;

[0008] Configure system information forwarding in the IEMP controller to receive and send data, as well as send energy coordination control instructions;

[0009] Set up a local monitoring layer for the power station to store and visualize data;

[0010] A central remote monitoring layer is set up to communicate with the local monitoring layer of the power station, store the received data, and provide remote monitoring analysis.

[0011] The following are further optimizations and / or improvements to the above technical solutions:

[0012] The setup process of the above central remote monitoring layer includes:

[0013] Set up data centers and servers to store and analyze the data sent by the local monitoring layer of the power station;

[0014] Set up a display and control system that can be used for Web browsers and mobile terminals, communicate with the server, and complete data viewing and command sending;

[0015] Set up a remote monitoring center, communicate with the data center, extract data, and realize real-time monitoring of data.

[0016] The subsystems within the above-mentioned smart microgrid include wind and solar power generation systems, energy storage systems, metering systems, protection systems, and controllable loads; the various functional devices include wind turbine grid-connected inverters, photovoltaic inverters, PCS, BMS, electric meters, and environmental monitors.

[0017] The second technical solution of the present invention is achieved by the following measures: a microgrid energy management system for areas with a high proportion of new energy, including a central remote monitoring layer, a power station local monitoring layer, a data acquisition and transmission layer, and a power station field equipment layer;

[0018] The power station on-site equipment layer is equipped with various functional devices of different subsystems in the smart microgrid;

[0019] The data acquisition and transmission layer builds a data transmission link between the power station field equipment layer and the power station local monitoring layer, collects and processes data from the power station field equipment layer, completes control mode switching, realizes corresponding energy storage energy distribution, and maintains and manages energy storage batteries;

[0020] The local monitoring layer of the power station monitors the various functional devices in the power station field equipment layer in real time, analyzes, stores and displays the data of the power station field equipment layer, and issues energy coordination control instructions;

[0021] The central remote monitoring layer stores data uploaded by the local monitoring layer of the power station and provides remote monitoring and analysis.

[0022] The following are further optimizations and / or improvements to the above technical solutions:

[0023] The above-mentioned power station on-site equipment layer includes wind turbine grid-connected inverter, photovoltaic inverter, wind power controller, distribution cabinet controller, PCS, BMS, electric meter device, and environmental monitoring instrument.

[0024] The above-mentioned data acquisition and transmission layer includes an IEMP controller. The IEMP controller communicates with various functional devices through a variety of communication interfaces of different specifications to realize the control of system protection and energy scheduling, complete the switching of data acquisition and control modes, and realize the corresponding energy storage energy distribution. The control modes include grid-connected operation mode, off-grid non-light operation mode, off-grid light operation mode and wind turbine power generation mode.

[0025] The above IEMP controller includes a hardware part and a software part;

[0026] The hardware part includes a communication management machine and an energy management control computer. The communication management machine communicates with various functional devices through a variety of communication interfaces of different specifications to realize the control logic of system protection and energy dispatch. The energy management control computer realizes the operation status monitoring, operation history status information recording, control mode switching of various functional devices, and realizes the corresponding energy storage energy distribution.

[0027] The software part includes the communication management machine embedded real-time operating system, communication management application software package, system status monitoring and historical information recording software.

[0028] The local monitoring layer of the above-mentioned power station includes a local remote display interface, a showroom display interface, a local human-machine display interface, and a data center. The data center stores the data sent by the data acquisition and transmission layer. The local remote display interface, the showroom display interface, and the local human-machine display interface are all used to display the data stored in the data center.

[0029] The above-mentioned central remote monitoring layer includes a remote monitoring center, a data center, a server, and a display and control system for Web browsers and mobile terminals. The data center stores the received data, the server processes and analyzes the data, the remote monitoring center communicates with the data center, views the data, and completes remote data monitoring. The display and control system communicates with the server to complete data viewing and command sending.

[0030] The present invention can realize the energy and power coordination management and control functions of different locations such as photovoltaic, wind power, energy storage, power grid, and user load in the intelligent microgrid, collect the operating status information data of the functional devices of each subsystem, and control each subsystem to operate within a safe range. It is compatible with five energy types such as wind power generation, photovoltaic power generation, electrochemical energy storage system, city power, and power load to carry out information collection, status monitoring, energy management, safe operation and maintenance in the off-grid / on-grid mode of generation-transmission-distribution-storage-use, effectively improve the new energy consumption capacity, improve the power quality, and have good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Attached Figure 1 This is a flow chart of Example 1 of the present invention.

[0032] Attached Figure 2 This is a schematic diagram of the structure of Example 2 of the present invention.

[0033] Attached Figure 3 Schematic diagram of the software framework of the communication management machine in Example 2 of the present invention. DETAILED DESCRIPTION

[0034] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0035] The present invention will be further described below in conjunction with embodiments and drawings:

[0036] Embodiment 1: As attached Figure 1 As shown, this embodiment discloses a method for designing a microgrid energy management system in an area with a high proportion of new energy, including:

[0037] S101, setting a data acquisition transmission layer, setting an IEMP controller and communication interfaces corresponding to various functional devices in different subsystems in the smart microgrid, and connecting with various functional devices; the communication interfaces here include Ethernet network port, RS485 interface, CAN interface, ES232 interface, etc.;

[0038] S102, counting the number of different types of communication interfaces, and configuring one or more IEMP controllers accordingly, configuring the communication point table of each functional device according to its communication interface, communication protocol, and communication protocol, and configuring the communication settings of the functional device; the communication point table includes a telesignaling information table, a telemetering information table, a remote control information table, and a remote adjustment information table, and the specific communication settings include protocol settings such as baud rate and check bit;

[0039] S103, determining the corresponding monitoring, alarm, protection methods and rules for each functional device, and determining the smart microgrid protection control and energy management control methods and rules in combination with the working status parameters of each functional device; the smart microgrid protection control and energy management control methods and rules are determined here so that each functional device in the system can coordinate and operate according to the system function requirements;

[0040] S104, configuring system information forwarding in the IEMP controller to realize data reception and transmission, and transmission of energy coordination control instructions; the energy coordination control instructions may be automatically generated by the IEMP controller or generated through human-computer interaction;

[0041] S105, setting up a local monitoring layer of the power station to realize data storage and visualization;

[0042] S106, setting up a central remote monitoring layer, communicating with the local monitoring layer of the power station, storing received data, and providing remote monitoring analysis.

[0043] The following are further optimizations and / or improvements to the above technical solutions:

[0044] The setting process of the central remote monitoring layer includes:

[0045] Set up data centers and servers to store and analyze the data sent by the local monitoring layer of the power station;

[0046] Set up a display and control system that can be used for Web browsers and mobile terminals, communicate with the server, and complete data viewing and command sending;

[0047] Set up a remote monitoring center, communicate with the data center, extract data, and realize real-time monitoring of data.

[0048] The subsystems within the smart microgrid include wind and solar power generation systems, energy storage systems, metering systems, protection systems, and controllable loads; the various functional devices include wind turbine grid-connected inverters, photovoltaic inverters, PCS, BMS, electric meters, and environmental monitors.

[0049] Embodiment 2: As attached Figure 2 As shown, this embodiment discloses a microgrid energy management system for areas with a high proportion of new energy, including a central remote monitoring layer, a power station local monitoring layer, a data acquisition and transmission layer, and a power station field equipment layer;

[0050] The on-site equipment layer of the power station is equipped with various functional devices of different subsystems within the smart microgrid.

[0051] The data acquisition and transmission layer builds a data transmission link between the power station field equipment layer and the power station local monitoring layer, collects and processes data from the power station field equipment layer, completes control mode switching, realizes corresponding energy storage energy distribution, and maintains and manages energy storage batteries; the data acquisition and transmission layer here can communicate with the power station local monitoring layer uplink and with multiple functional devices downlink, so as to collect the operating status information data of the functional devices in each subsystem, realize the coordinated management and control of energy and power in different locations such as photovoltaic, wind power, energy storage, power grid, and user load in the smart microgrid, and control each subsystem to operate within a safe range;

[0052] The local monitoring layer of the power station monitors the various functional devices in the power station's on-site equipment layer in real time, analyzes, stores, and displays the data of the power station's on-site equipment layer, and issues energy coordination and control instructions; the energy coordination and control instructions issued here are set by the staff during human-computer interaction.

[0053] The central remote monitoring layer stores data uploaded by the local monitoring layer of the power station and provides remote monitoring and analysis.

[0054] Embodiment 3: As attached Figure 2 , 3As shown, this embodiment discloses a microgrid energy management system for areas with a high proportion of new energy, including a central remote monitoring layer, a power station local monitoring layer, a data acquisition and transmission layer, and a power station field equipment layer;

[0055] The on-site equipment layer of the power station includes wind turbine grid-connected inverters, photovoltaic inverters, wind power controllers, distribution cabinet controllers, PCS, BMS, electric meter devices, and environmental monitors.

[0056] The data acquisition and transmission layer includes the IEMP controller, which communicates with various functional devices through a variety of communication interfaces of different specifications to realize the control of system protection and energy scheduling, complete the switching of data acquisition and control modes, and realize the corresponding energy storage energy distribution. The control modes include grid-connected operation mode, off-grid non-light operation mode, off-grid light operation mode and wind turbine power generation mode.

[0057] Here the IEMP controller includes hardware and software parts;

[0058] The hardware part includes a communication management machine and an energy management control computer; the communication management machine communicates with each functional device through a variety of communication interfaces of different specifications to realize the control logic of system protection and energy scheduling, and can use an embedded communication dedicated computer based on the RISC system; the energy management control computer realizes the operation status monitoring of each functional device, the operation history status information recording, the control mode switching, and the corresponding energy storage energy distribution, and can use an industrial control computer based on the PC bus, that is, a general industrial computer. The above-mentioned communication management machine can accept a wide voltage input range from 85V to 260V, and can be AC / DC AC / DC power input, and is equipped with dual power seamless switching input: that is, the device can be connected to two external power supplies, one as the main working power supply, and the other as the auxiliary working power supply. Under normal conditions, the main working power supply works and the auxiliary power supply does not power the device; when the main working power supply loses power, the auxiliary power supply can seamlessly switch to the working power supply to power the device, thereby greatly improving the reliability and stability of the on-site operation of the system equipment.

[0059] The software part includes the embedded real-time operating system of the communication management machine, the communication management application software package, and the system status monitoring and historical information recording software. The embedded real-time operating system of the communication management machine is based on the Linux operating system kernel. It has carried out perfect underlying driver development, operating system transplantation and sufficient testing for the hardware platform of the communication management machine. Many years of application cases have also confirmed the stability of the underlying driver and operating system. The communication management application software package runs on the Linux operation to realize communication interface message information transmission and reception, protocol configuration and analysis, data processing, port configuration, energy management control logic, information forwarding and other communication management application functions. The system status monitoring and historical information recording software runs on the IEMP industrial computer Windows operating system, and realizes the status monitoring of the smart microgrid in the form of a graphical interface. It can modify the operating parameters or operating mode of the smart microgrid through human-computer interaction, realize the corresponding energy storage energy distribution, and store the key data information of the smart microgrid operation. It can also query, analyze and draw curves for historical operation information. The core software platform of the smart microgrid control in the communication management machine adopts the open source Linux system as the core system of the device, and is designed according to the layered and modular ideas. The entire software is divided into port layer, link layer, terminal layer, protocol layer, data processing module, plant station module, remote signal module, telemetry module, remote pulse module, event processing module, remote control module, calculation module, sampling module, login management module, etc.; and the database is classified and designed, divided into system database, real-time database, calculation database, sampling database, login database, front-end database, etc.

[0060] The local monitoring layer of the power station includes the local remote display interface, the exhibition hall display interface, the local human-machine display interface, and the data center. The data center stores the data sent by the data acquisition and transmission layer. The local remote display interface communicates directly with the data center to display the data stored in the data center. The exhibition hall display interface communicates with the data center through the local area network to display the data stored in the data center. The local human-machine display interface communicates with the data center through the public network to display the data stored in the data center.

[0061] The central remote monitoring layer includes a remote monitoring center, a data center, a server, and a display and control system for Web browsers and mobile terminals. The data center and the server communicate with the local monitoring layer of the power station through the public network. The data center stores the received data, and the server processes and analyzes the data. The remote monitoring center communicates with the data center to view the data and complete remote data monitoring. The display and control system communicates with the server to complete data viewing and command sending.

[0062] The present invention can realize the energy and power coordination management and control functions of different locations such as photovoltaic, wind power, energy storage, power grid, and user load in the intelligent microgrid, collect the operating status information data of the functional devices of each subsystem, and control each subsystem to operate within a safe range. It is compatible with five energy types such as wind power generation, photovoltaic power generation, electrochemical energy storage system, city power, and power load to carry out information collection, status monitoring, energy management, safe operation and maintenance in the off-grid / on-grid mode of generation-transmission-distribution-storage-use, effectively improve the new energy consumption capacity, improve the power quality, and have good economic and social benefits.

[0063] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A design method for a microgrid energy management system in areas with a high proportion of new energy, characterized in that: include: Set up a data acquisition and transmission layer, set up an IEMP controller and communication interfaces corresponding to various functional devices in different subsystems in the smart microgrid, and connect with various functional devices. The subsystems in the smart microgrid include wind and solar power generation systems, energy storage systems, metering systems, protection systems, and controllable loads. The functional devices include wind turbine grid-connected inverters, photovoltaic inverters, PCS, BMS, electric meters, and environmental monitoring instruments. Count the number of different types of communication interfaces, configure one or more IEMP controllers accordingly, configure the communication point table of each functional device according to its communication interface and communication protocol, and configure the communication settings of the functional device, wherein the communication point table includes the telesignaling information table, the telemetering information table, the remote control information table, and the remote adjustment information table, and the specific communication settings include the baud rate and the check bit; According to the functions of each functional device, determine the corresponding monitoring, alarm, protection methods and rules, and combine the working status parameters of each functional device to determine the protection control and energy management control methods and rules of the smart microgrid; Configure system information forwarding in the IEMP controller to receive and send data, as well as send energy coordination control instructions; Set up a local monitoring layer for the power station to store and visualize data; A central remote monitoring layer is set up to communicate with the local monitoring layer of the power station, store the received data, and provide remote monitoring analysis.

2. The design method of microgrid energy management system for areas with high proportion of new energy according to claim 1 is characterized in that: The setting process of the central remote monitoring layer includes: Set up data centers and servers to store and analyze the data sent by the local monitoring layer of the power station; Set up a display and control system that can be used for Web browsers and mobile terminals, communicate with the server, and complete data viewing and command sending; Set up a remote monitoring center, communicate with the data center, extract data, and realize real-time monitoring of data.

3. A microgrid energy management system for areas with a high proportion of new energy, characterized in that: It includes central remote monitoring layer, power station local monitoring layer, data acquisition and transmission layer and power station field equipment layer; The power station on-site equipment layer is equipped with various functional devices of different subsystems in the smart microgrid, including wind turbine grid-connected inverter, photovoltaic inverter, wind power controller, distribution cabinet controller, PCS, BMS, electric meter device, and environmental monitoring instrument; The data acquisition and transmission layer includes an IEMP controller. The IEMP controller communicates with various functional devices through a variety of communication interfaces of different specifications to realize the control of system protection and energy dispatch, complete the switching of data acquisition and control modes, and realize the corresponding energy storage energy distribution. The control modes include grid-connected operation mode, off-grid non-light operation mode, off-grid light operation mode and wind turbine power generation mode. Specifically, the IEMP controller includes hardware and software parts; The hardware part includes a communication management machine and an energy management control computer. The communication management machine communicates with various functional devices through a variety of communication interfaces of different specifications to realize the control logic of system protection and energy dispatch. The energy management control computer realizes the operation status monitoring, operation history status information recording, control mode switching of various functional devices, and realizes the corresponding energy storage energy distribution. The software part includes the embedded real-time operating system of the communication management machine, the communication management application software package, and the system status monitoring and historical information recording software; The local monitoring layer of the power station monitors the various functional devices in the on-site equipment layer of the power station in real time, analyzes, stores and displays the data of the on-site equipment layer of the power station, and issues energy coordination control instructions; The central remote monitoring layer stores data uploaded by the local monitoring layer of the power station and provides remote monitoring and analysis.

4. The energy management system for microgrids in areas with high proportion of new energy according to claim 3 is characterized in that: The local monitoring layer of the power station includes a local remote display interface, a showroom display interface, a local human-machine display interface, and a data center. The data center stores the data sent by the data acquisition and transmission layer. The local remote display interface, the showroom display interface, and the local human-machine display interface are all used to display the data stored in the data center; or / and, the central remote monitoring layer includes a remote monitoring center, a data center, a server, and a display and control system for Web browsers and mobile terminals. The data center stores the received data, the server processes and analyzes the data, the remote monitoring center communicates with the data center, views the data, and completes remote data monitoring. The display and control system communicates with the server to complete data viewing and command sending.

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