WO2018014450A1 - Rt-lab-based real microgrid operation dynamic simulation testing platform - Google Patents

Rt-lab-based real microgrid operation dynamic simulation testing platform Download PDF

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WO2018014450A1
WO2018014450A1 PCT/CN2016/101960 CN2016101960W WO2018014450A1 WO 2018014450 A1 WO2018014450 A1 WO 2018014450A1 CN 2016101960 W CN2016101960 W CN 2016101960W WO 2018014450 A1 WO2018014450 A1 WO 2018014450A1
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microgrid
lab
grid
simulation
micro
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PCT/CN2016/101960
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French (fr)
Chinese (zh)
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申刚
李小宇
张岩
邹广宇
尚德华
张源超
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天津天大求实电力新技术股份有限公司
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B17/00—Systems involving the use of models or simulators of said systems
    • G05B17/02—Systems involving the use of models or simulators of said systems electric

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  • the invention belongs to the field of new energy microgrid technology, in particular to a real dynamic grid test simulation platform based on RT-LAB.
  • the current energy situation is tense and environmental pollution is serious.
  • the state has issued various policies to support the transformation of the power grid and reduce the power supply pressure of the power grid.
  • the traditional simulation technology is either physical or pure digital.
  • the former is mostly a scaled-down simulation environment, such as analog impedance, analog fan, etc., and is limited by site and capacity.
  • the pure number used by the latter does not require space and capacity, but the digital model often comes through the equivalent formula or circuit, which causes distortion of the operating characteristics.
  • Existing control loop and power in loop simulation All of them only connect the control board or the reduced-scale physical device into the system, and still cannot fully realize the construction of the real micro-network running characteristic simulation environment.
  • the real micro-grid operation characteristics have a great impact on the conclusions of the newly developed equipment in the ring test and equipment hardware debugging.
  • the advanced real-time simulation technology is mainly realized by RT-LAB or RTDS simulator, or through the simulation machine and part of the converter control board to control the loop simulation environment. These construction methods are still built by mathematical models. Therefore, the realization of the micro-source operating characteristics cannot be achieved.
  • the invention provides a real micro-grid operation dynamic simulation test platform based on RT-LAB, breaks through the existing simulation platform construction method, avoids the disadvantages of the conventional simulation platform, and can be used for testing and micro-network system engineering of the novel micro-network device.
  • the pre-simulation and debugging provides a completely real environment, timely discovering problems and correcting them online, ensuring the reliability of equipment and engineering operation, and greatly reducing equipment development and engineering commissioning costs.
  • a real micro-grid operation dynamic simulation test platform based on RT-LAB including a physical micro-grid system, an RT-LAB simulation system, a communication system, and a micro-grid energy management system;
  • the physical microgrid system shares a set of microgrid energy management system with the RT-LAB simulation system, and the microgrid energy management system realizes real-time monitoring, real-time data analysis and historical storage query of all equipment and load operating states in the system. And comprehensively consider information decision according to the operation mode of the microgrid, and adjust the real-time running state of the microgrid;
  • the physical microgrid system and the RT-LAB simulation system are realized by a communication system Transmission and conversion of digital and analog;
  • the RT-LAB simulation system includes a distribution network simulation model built using the HYPERSIM software system, a distribution transformer built using the eMEGAsim software system, and the following micro-grid simulation model containing power electronic equipment, the distribution network model and the microgrid
  • the simulation models are all controlled source models, that is, the data of the corresponding devices of the physical microgrid system are collected, and transmitted into the model as the control amount.
  • the physical microgrid system is a multi-layer nested AC/DC hybrid microgrid group.
  • the physical microgrid system includes an optical storage primary microgrid, two optical storage microgrids and a DC submicrogrid, all of which are uniformly monitored and operated by the microgrid energy management system; the submicrogrid adopts interpolation In a ready-to-use manner, each sub-microgrid has a lower level of protection than the main microgrid.
  • the optical storage main microgrid builds an alternating microgrid structure for photovoltaic and lithium battery energy storage;
  • the two optical storage microgrids include a light storage irrigation system and an integrated energy supply system;
  • the optical storage irrigation system constructs a communication via photovoltaic and energy storage.
  • the microgrid supplies power to irrigation pumps and lamps to realize the application of microgrids in green irrigation.
  • the integrated energy supply system builds a communication sub-grid through photovoltaics and energy storage, and supplies power to ground source heat pumps and lamps to realize microgrids.
  • the application of integrated heat and cold energy supply; the DC sub-microgrid is to construct a light storage DC sub-grid and connect to the DC LED lighting in the system through a large-scale converter.
  • the line terminal output voltage and current signals of the HYPERSIM distribution network simulation model are transmitted to the eMEGAsim microgrid simulation.
  • the high-voltage side of the distribution transformer forms the grid-connected structure of the micro-grid.
  • the voltage and current data of the measurement and control protection device to be tested on the distribution network side of the physical microgrid system is transmitted to the distribution network side of the RT-LAB simulation system through the power amplifier of the communication system as a control
  • the current data of the measurement and control protection device on the photovoltaic device side of the physical microgrid system is transmitted to the photovoltaic device side of the RT-LAB simulation system as a control amount after passing through the power amplifier of the communication system; the physical microgrid
  • the SVPWM wave of the photovoltaic converter of the system is converted into a digital control signal through the I/O module of the communication system, and the main circuit of the photovoltaic converter constructed in the RT-LAB simulation system is controlled.
  • the measurement and control protection device is communicably connected to the physical micro grid system and the RT-LAB simulation system through a MODBUS module.
  • the microgrid energy management system is divided into a data acquisition monitoring module and an energy management advanced application module;
  • the data acquisition monitoring module provides a data source, accepts instructions, and performs real-time monitoring and real-time data on all devices and load running states. Analysis and historical storage query;
  • the energy management advanced application module comprehensively considers the existing operating state of the distributed power supply and energy storage system, the user load power supply level, the data prediction reference and other information decisions according to the micro-grid operation mode, and adjusts the micro-grid real-time operation. status.
  • the energy management advanced application module includes a data prediction unit, an optimization scheduling unit, and an operation control unit;
  • the data prediction unit includes a photovoltaic prediction and a load prediction, and provides an input for the energy management optimization scheduling unit;
  • the optimization scheduling unit is configured according to Prediction results of data prediction, time-of-use electricity price information, power-on-net threshold, input load priority, rated capacity of each grid-connected inverter device, charge/discharge voltage/SOC limit of energy storage system,
  • the output optimization scheduling recommendation instruction is provided; the operation control unit gives a correction suggestion instruction according to the actual working condition of the system operation.
  • Figure 1 shows the structure of a real micro-grid characteristic dynamic simulation test platform
  • Figure 2 is a physical microgrid system structure
  • FIG. 3 is a schematic diagram of the construction of a photovoltaic system simulation model
  • Figure 4 is a schematic diagram of photovoltaic operation
  • Figure 5 is a test mode diagram of the measurement and control protection device
  • Figure 6 is a diagram showing the test mode of the converter device.
  • It has the function of measuring, collecting and transmitting the number, and can also protect the line and protect the action when the line is abnormal.
  • Energy Management System is a modern power system integrated automation system supported by computer technology and power system application software technology. It is also the integration or integration of energy systems and information systems, generally including data collection, energy management and network analysis. Three major functions.
  • the energy storage converter can control the charging and discharging process of the battery, and convert the AC and DC. In the absence of the grid, the AC load can be directly supplied.
  • the PCS is composed of a DC/AC bidirectional converter, a control unit, and the like.
  • the Battery Management System is the link between the battery and the PCS to improve battery utilization, prevent overcharging and over-discharging of the battery, extend battery life, and monitor battery status.
  • HyperSim is an electromagnetic transient simulation software developed by the world-renowned power system simulation laboratory Quebec Hydropower Research and Development Center based on years of research on the world's most complex transmission system. It is the only one in the world capable of achieving 10,000+ node simulation analysis. Test system for electromagnetic transient real-time simulation of very large power systems.
  • eMEGAsim is a high-precision, multi-processor real-time simulation platform tailored for high-precision real-time simulation, rapid control prototyping (RCP) and hardware-in-the-loop simulation testing (HIL) for large power grids and power electronics systems. It inherits Opal-RT's eMEGAsim distributed parallel processing ideas, based on The Core TM 2Quad multi-core processor and FPGA technology can run in real time in small steps below microseconds, accurately simulating various electromagnetic transients in current power systems, and has been used more and more widely in the field of power electronics simulation.
  • HYPERSIM and eMEGAsim are two different simulation platforms based on the same RT-LAB hardware device from OPRL-RT.
  • the invention uses HYPERSIM and eMEGAsim dual simulation system, combined with real-time data communication technology, to construct a simulation test environment with real operating characteristics, which can improve the consistency of the results of equipment and system simulation test and actual operation, and can also be used for micro-network engineering construction. Advance commissioning work provides advice.
  • the real micro-network characteristic dynamic simulation test platform constructed by the invention not only includes the equipment model of photovoltaic and energy storage used in the actual micro-network, but also constructs a common diesel generator and other equipment models, as well as the measurement and control protection device and mode control. Load models with different sensitivities.
  • the simulation test platform supports secondary development, which can expand new equipment and build a new microgrid combination.
  • the simulation test platform shares a set of microgrid energy management system with the actual microgrid.
  • the electrical measurement data on the interface of the simulation system is displayed synchronously with the actual “four remote” data of the microgrid.
  • the main structure is shown in Figure 1.
  • the simulation test platform mainly includes physical microgrid system, RT-LAB simulation system, communication system, MODBUS module, power amplifier, and microgrid energy management system. The following describes each system in detail.
  • the real microgrid physical system is a multi-layer nested AC/DC hybrid microgrid group.
  • the main equipments involved include photovoltaic, energy storage, ground source heat pump and hydrogen fuel cell.
  • the specific structure is shown in Figure 2.
  • the physical microgrid system includes an optical storage master microgrid, two optical storage microgrids and a DC submicrogrid, all of which are uniformly monitored and operated by the microgrid energy management system.
  • the actual microgrid adopts the “plug and play” approach.
  • Each submicrogrid has a lower level of protection configuration than the main microgrid, so overvoltage, overcurrent or electrical energy occurs during the testing process of a single device or control module.
  • the device or sub-micro network will automatically leave the main network first, and does not affect the normal operation of other sub-micro networks and the overall micro-grid system during the test.
  • the main microgrid builds an AC microgrid structure for photovoltaic and lithium battery energy storage
  • the optical storage irrigation system is to construct a communication sub-microgrid through photovoltaic and energy storage, to supply irrigation water pumps and lighting lamps, and to realize the application of microgrid in green irrigation;
  • the integrated energy supply system is to build a communication sub-microgrid through photovoltaic and energy storage, to supply ground source heat pump and lighting, and to realize the application of microgrid in the integrated energy supply of cold and heat;
  • DC microgrid is to build a light storage DC sub-grid, and connect to the DC LED lighting in the system through a large converter.
  • the photovoltaic system contains photovoltaic cells and inverters.
  • the energy storage PCS operation strategy mainly includes control methods such as constant voltage/constant frequency control (V-f), constant power control (PQ) and droop control (Droop).
  • V-f constant voltage/constant frequency control
  • PQ constant power control
  • Droop droop control
  • the PCS runs in the PQ mode to provide or absorb power for the system.
  • the main micro-network PCC point is disconnected, and the main micro-network energy storage operation strategy is switched from PQ to Vf mode.
  • the voltage and frequency support is provided, and the sub-microgrid energy storage still operates in the PQ mode; when the main microgrid cannot supply power, the sub-microgrid can also seamlessly switch to the off-grid operation, and the energy storage system in the sub-microgrid runs in the Vf mode.
  • HYPERSIM emulation host and real-time target machine
  • eMEGAsim hardware devices
  • HYPERSIM Using HYPERSIM to build a distribution network model, it can simulate the distribution network under normal and fault conditions (including voltage fluctuations, frequency fluctuations, symmetric or asymmetric short circuits, lightning strikes, line disconnection, etc.); use eMEGAsim to build distribution transformers. And the following micro-grid simulation models with many power electronic devices.
  • the communication between the two systems is realized by OP5607, and the output voltage and current signals of the HYPERSIM distribution network line terminal are transmitted to the distribution transformer in eMEGAsim via OP5607. Press the side to form a microgrid grid structure.
  • Both the distribution network and the microgrid model include two types, one is to build a pure digital model that meets the actual equipment characteristics, and the other is a controlled source model (acquisition of voltage and current data corresponding to the physical microgrid, after passing through the power amplifier The input model is used as the control amount).
  • the following takes the photovoltaic grid-connected structure as an example to explain how the simulation test platform implements real device information access and how to implement controller testing.
  • the electrical side and photovoltaic equipment in the synchronous microgrid system are controlled by actual signals; the signal acquisition of the photovoltaic inverter controller (board) comes from the actual microgrid system, and the actual microgrid and analog microgrid are controlled.
  • the photovoltaic device can run by itself or by external control.
  • the principle is shown in Figure 4.
  • the I/O module is mainly used for the transmission and conversion of digital and analog quantities between the physical microgrid system and the analog microgrid system, such as the SVPWM wave of the photovoltaic converter, which can receive the analog data input by the physical microgrid system. It is converted into a digital control signal, and then the main circuit of the photovoltaic converter built in the simulation system is controlled to realize the realization of the output characteristics of the converter.
  • the analog microgrid system such as the SVPWM wave of the photovoltaic converter
  • the three-phase or single-phase analog input and output can meet the requirements of the real-time simulator working environment.
  • MEMS microgrid energy management system
  • the microgrid energy management system is divided into two modules: data acquisition monitoring and energy management advanced application.
  • (1) Data acquisition and monitoring system As the data center of MEMS, in addition to providing data source for other modules, it can also accept commands from other modules, real-time monitoring and real-time data analysis of all equipment and load operation status in the system. Historical storage query.
  • the advanced application module is the core module of MEMS, which determines the behavior of MEMS and determines the degree of intelligence of MEMS.
  • the energy management module can comprehensively consider the existing operating states of the distributed power supply and energy storage system, the user load power supply level, the data prediction reference and other information decisions according to the micro-grid operation mode, and adjust the real-time operation state of the micro-grid.
  • the main functions of the energy management advanced application module include: data prediction, optimized scheduling, and operational control. Among them, the data prediction algorithm includes photovoltaic prediction and load prediction, and provides input for the energy management optimization scheduling algorithm.
  • the energy management algorithm includes two parts: optimized scheduling and operational control.
  • the optimized scheduling algorithm will predict the predicted results based on the data, the time-of-use price information (including the price of buying and selling electricity), the power-on threshold, the input load priority, the rated capacity of each grid-connected inverter device, and the energy storage system. Discharge voltage / SOC limit, output optimization scheduling recommendations.
  • the operation control algorithm gives a correction suggestion instruction according to the actual working conditions of the system operation. The user can decide whether the instruction is automatically delivered.
  • This test platform can be based on the real-time operation characteristics of multi-layer nested micro-grid Equipment testing, new structure micro-network operation stability test, and micro-network optimization scheduling strategy test in different networking forms.
  • the detection center can realize the performance detection of a single device, the reliability detection of the new structure microgrid, and the customized development of the control strategy.
  • Each sub-microgrid in the actual microgrid has a lower level of protection configuration than the main microgrid. Therefore, when overvoltage, overcurrent, or power quality exceeds the standard during the test of a single device or control module, the sub-microgrid will Automatically disconnected from the main network, so it does not affect the normal operation of the overall microgrid system during the test.
  • the control strategy of the measured relay protection device to a grid-connected switch first connects the protection device control signal to the corresponding model signal receiving point in the eMAGAsim simulation system, simulates the fault condition through the eMAGAsim simulation system, or simulates the grid fault through the HYPERSIM system.
  • the fault types include voltage fluctuations, frequency fluctuations, symmetrical short circuits, asymmetric short circuits, disconnections, voltage drops, and the like.
  • the real-time analysis of the protection device action strategy and sensitivity, the simulation system can observe and record the protection device operation and action status in real time. Before the equipment is actually applied to the construction of the micro-grid project, it can maximize the hidden dangers and improve the operational reliability of the equipment. As shown in Figure 5.
  • the PCS device to be tested is replaced with the PCS in the current actual system, and the pulse adjustment signal is connected to the PCS corresponding to the eMAGAsim simulation system, and the simulation is performed.
  • the platform simulates load switching, power supply and off-grid, light wind speed and other external resource mutations, operation mode switching, etc., through continuous online debugging parameters, so that the device operation output waveform can achieve the expected results, and can further in the overall micro-network environment, System-level testing is performed to record the transient steady-state changes of the PCS under different operating conditions in real time. In order to discover the problems that occur in the operation of the real system, and repeat the test and solution to improve the reliability of the device running in the actual micro network.
  • micro-sources such as biomass and diesel generators can be added on the basis of the existing equipment model, and the actual control boards of all the equipments can be connected to the test platform for hardware-in-the-loop simulation, for no control.
  • the board's equipment can also be replaced with a model that is closest to the actual equipment characteristics.

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Abstract

An RT-LAB-based real microgrid operation dynamic simulation testing platform. A power grid simulation model is built by a HYPERSIM software system, a microgrid simulation model constituted by micro-sources such as photovoltaics, energy-storage, hydrogen fuel cells is built by an eMEGAsim software system, and outputs of microsources in a physical microgrid system serve as inputs for the microgrid simulation model, thus providing the simulation system with real microgrid operating characteristics. The shortcoming of digital simulation is fully considered, provided is a scheme in which the digital is combined with the physical, and the operating characteristics of a physical microgrid system are introduced into a simulator, thus implementing the authenticity of the operating characteristics of a microgrid as a whole, and providing a realistic environment for equipment testing and simulation analysis.

Description

基于RT-LAB的真实微电网运行动态仿真测试平台Real micro-grid operation dynamic simulation test platform based on RT-LAB 技术领域Technical field
本发明属于新能源微电网技术领域，特别是涉及到一种基于RT-LAB的真实微电网运行动态仿真测试平台。The invention belongs to the field of new energy microgrid technology, in particular to a real dynamic grid test simulation platform based on RT-LAB.
背景技术Background technique
当前能源局势紧张，环境污染严重，国家下达各类政策支持电网改造，减轻电网供电压力。随着负荷量的不断增长，其对电能质量和供电可靠性提出更高要求。迫于环境保护和能源枯竭的双重压力，微电网以其接在用户侧，具有成本低、电压低以及污染小等特点而开始被人们重视，借势智能电网国家政策，微电网也开始从实验示范阶段逐步向商业化应用阶段转化。但是对于微电网设备和工程来说，当前国内外均没有一个良好的测试环境，从而造成生产的微网设备在实际工程运行当中出现调试困难、故障频发等众多情况，而通过仿真测试平台可以为设备策略、生产及调试打造模拟的微电网环境，及时发现问题，可通过循环测试实现策略的优化和问题的修正。The current energy situation is tense and environmental pollution is serious. The state has issued various policies to support the transformation of the power grid and reduce the power supply pressure of the power grid. As the load continues to increase, it puts higher demands on power quality and power supply reliability. Due to the dual pressures of environmental protection and energy depletion, the microgrid began to be valued by its low-cost, low-voltage and low-pollution characteristics. With the help of the smart grid national policy, the micro-grid also began experimenting. The demonstration phase is gradually transformed into a commercial application phase. However, for microgrid equipment and engineering, there is no good test environment at home and abroad, which results in the production of microgrid equipment in the actual engineering operation, debugging difficulties, frequent failures and many other situations, and through the simulation test platform can To create a simulated microgrid environment for equipment strategy, production and commissioning, and to identify problems in a timely manner, loop optimization can be used to optimize the strategy and correct the problem.
经查找现有资料分析，传统仿真技术要么采用物理方式，要么采用纯数字方式，这两种方式中前者多为缩小比例的模拟环境，比如模拟阻抗，模拟风机等，且受到场地和容量的限制；而后者采用的纯数字虽对场地及容量没有要求，但由于数字模型多通过等效公式或电路而来，从而造成运行特性的失真。而现有的控制在环和功率在环仿真 也均只是将控制板或缩小比例的物理设备接入***当中，仍然不能完全实现真实微网运行特性仿真环境的搭建。真实的微网运行特性，对于新研制设备在环测试和设备硬件调试的结论影响巨大。目前先进的实时仿真技术主要是通过RT-LAB或RTDS仿真机来实现，或者通过仿真机和部分变流器控制板组建控制在环仿真环境等方式，这些组建方式由于电源仍采用数学模型搭建，因此无法实现微源运行特性的真实化。After searching for existing data analysis, the traditional simulation technology is either physical or pure digital. The former is mostly a scaled-down simulation environment, such as analog impedance, analog fan, etc., and is limited by site and capacity. The pure number used by the latter does not require space and capacity, but the digital model often comes through the equivalent formula or circuit, which causes distortion of the operating characteristics. Existing control loop and power in loop simulation All of them only connect the control board or the reduced-scale physical device into the system, and still cannot fully realize the construction of the real micro-network running characteristic simulation environment. The real micro-grid operation characteristics have a great impact on the conclusions of the newly developed equipment in the ring test and equipment hardware debugging. At present, the advanced real-time simulation technology is mainly realized by RT-LAB or RTDS simulator, or through the simulation machine and part of the converter control board to control the loop simulation environment. These construction methods are still built by mathematical models. Therefore, the realization of the micro-source operating characteristics cannot be achieved.
发明内容Summary of the invention
本发明提供了一种基于RT-LAB的真实微电网运行动态仿真测试平台，突破了已有的仿真平台构建方法，避免了常规仿真平台的弊端，可为新型微网设备测试及微网***工程前期仿真调试提供完全真实的环境，及时发现问题并在线修正，保障设备及工程运行的可靠性，极大减少设备研制及工程调试成本。The invention provides a real micro-grid operation dynamic simulation test platform based on RT-LAB, breaks through the existing simulation platform construction method, avoids the disadvantages of the conventional simulation platform, and can be used for testing and micro-network system engineering of the novel micro-network device. The pre-simulation and debugging provides a completely real environment, timely discovering problems and correcting them online, ensuring the reliability of equipment and engineering operation, and greatly reducing equipment development and engineering commissioning costs.
本发明的技术方案是这样实现的：一种基于RT-LAB的真实微电网运行动态仿真测试平台，包括物理微电网***、RT-LAB仿真***、通信***、微电网能量管理***；The technical solution of the present invention is realized as follows: a real micro-grid operation dynamic simulation test platform based on RT-LAB, including a physical micro-grid system, an RT-LAB simulation system, a communication system, and a micro-grid energy management system;
所述物理微电网***与RT-LAB仿真***共用一套微电网能量管理***，所述微电网能量管理***实现对***内所有设备与负荷运行状态的实时监控、实时数据分析和历史存储查询，以及根据微电网运行模式综合考虑信息决策、调整微电网实时运行状态；The physical microgrid system shares a set of microgrid energy management system with the RT-LAB simulation system, and the microgrid energy management system realizes real-time monitoring, real-time data analysis and historical storage query of all equipment and load operating states in the system. And comprehensively consider information decision according to the operation mode of the microgrid, and adjust the real-time running state of the microgrid;
所述物理微电网***与RT-LAB仿真***之间通过通信***实现 数字量与模拟量的传输与转换；The physical microgrid system and the RT-LAB simulation system are realized by a communication system Transmission and conversion of digital and analog;
所述RT-LAB仿真***包括使用HYPERSIM软件***搭建的配电网仿真模型、使用eMEGAsim软件***搭建的配电变压器及以下含有电力电子设备的微电网仿真模型，所述配电网模型和微电网仿真模型都是受控源模型，即采集物理微电网***对应设备的数据，传输入模型做为控制量。The RT-LAB simulation system includes a distribution network simulation model built using the HYPERSIM software system, a distribution transformer built using the eMEGAsim software system, and the following micro-grid simulation model containing power electronic equipment, the distribution network model and the microgrid The simulation models are all controlled source models, that is, the data of the corresponding devices of the physical microgrid system are collected, and transmitted into the model as the control amount.
进一步的，所述物理微电网***是一个多层嵌套式交直流混合微网群。Further, the physical microgrid system is a multi-layer nested AC/DC hybrid microgrid group.
更进一步的，所述物理微电网***包括一个光储主微网，两个光储子微网和一个直流子微网，均通过微网能量管理***进行统一监控和运行调度；子微网采用即插即用的方式，每一个子微网均有较主微网低一级的保护配置。Further, the physical microgrid system includes an optical storage primary microgrid, two optical storage microgrids and a DC submicrogrid, all of which are uniformly monitored and operated by the microgrid energy management system; the submicrogrid adopts interpolation In a ready-to-use manner, each sub-microgrid has a lower level of protection than the main microgrid.
再进一步，光储主微网为光伏和锂电池储能构建交流微电网结构；两个光储子微网包括光储灌溉***和综合能源供应***；光储灌溉***是通过光伏和储能构建交流子微电网，为灌溉水泵和照明灯供电，实现微电网在绿色灌溉方面的应用；综合能源供应***是通过光伏和储能构建交流子微电网，为地源热泵和照明灯供电，实现微电网在冷热电综合能源供应方面的应用；直流子微网是构建光储直流子微网，并通过大型变流器并网，为***内的直流LED照明灯供电。Further, the optical storage main microgrid builds an alternating microgrid structure for photovoltaic and lithium battery energy storage; the two optical storage microgrids include a light storage irrigation system and an integrated energy supply system; the optical storage irrigation system constructs a communication via photovoltaic and energy storage. The microgrid supplies power to irrigation pumps and lamps to realize the application of microgrids in green irrigation. The integrated energy supply system builds a communication sub-grid through photovoltaics and energy storage, and supplies power to ground source heat pumps and lamps to realize microgrids. The application of integrated heat and cold energy supply; the DC sub-microgrid is to construct a light storage DC sub-grid and connect to the DC LED lighting in the system through a large-scale converter.
进一步的，所述RT-LAB仿真***中，将HYPERSIM配电网仿真模型的线路终端输出电压、电流信号，传输给eMEGAsim微电网仿真 模型中的配电变压器高压侧，组建微电网并网结构。Further, in the RT-LAB simulation system, the line terminal output voltage and current signals of the HYPERSIM distribution network simulation model are transmitted to the eMEGAsim microgrid simulation. In the model, the high-voltage side of the distribution transformer forms the grid-connected structure of the micro-grid.
进一步的，所述物理微电网***的配电网侧的待测的测控保护装置的电压电流数据，经过通信***的功率放大器后传输入所述RT-LAB仿真***的配电网侧做为控制量；所述物理微电网***的光伏设备侧的测控保护装置的电流数据，经过通信***的功率放大器后传输入所述RT-LAB仿真***的光伏设备侧做为控制量；所述物理微电网***的光伏变流器的SVPWM波，通过通信***的I/O模块，转换为数字量控制信号，对所述RT-LAB仿真***当中构建的光伏变流器主电路进行控制。Further, the voltage and current data of the measurement and control protection device to be tested on the distribution network side of the physical microgrid system is transmitted to the distribution network side of the RT-LAB simulation system through the power amplifier of the communication system as a control The current data of the measurement and control protection device on the photovoltaic device side of the physical microgrid system is transmitted to the photovoltaic device side of the RT-LAB simulation system as a control amount after passing through the power amplifier of the communication system; the physical microgrid The SVPWM wave of the photovoltaic converter of the system is converted into a digital control signal through the I/O module of the communication system, and the main circuit of the photovoltaic converter constructed in the RT-LAB simulation system is controlled.
更进一步的，所述测控保护装置通过MODBUS模块与所述物理微电网***、RT-LAB仿真***进行通信连接。Further, the measurement and control protection device is communicably connected to the physical micro grid system and the RT-LAB simulation system through a MODBUS module.
进一步的，所述微电网能量管理***分为数据采集监控模块和能量管理高级应用模块；所述数据采集监控模块提供数据源、接受指令，并对所有设备与负荷运行状态进行实时监控、实时数据分析和历史存储查询；所述能量管理高级应用模块根据微电网运行模式综合考虑分布式电源及储能***的现有运行状态、用户负荷供电等级、数据预测参考等信息决策，调整微电网实时运行状态。Further, the microgrid energy management system is divided into a data acquisition monitoring module and an energy management advanced application module; the data acquisition monitoring module provides a data source, accepts instructions, and performs real-time monitoring and real-time data on all devices and load running states. Analysis and historical storage query; the energy management advanced application module comprehensively considers the existing operating state of the distributed power supply and energy storage system, the user load power supply level, the data prediction reference and other information decisions according to the micro-grid operation mode, and adjusts the micro-grid real-time operation. status.
更进一步的，所述能量管理高级应用模块包括数据预测单元、优化调度单元、运行控制单元；所述数据预测单元包括光伏预测及负荷预测，为能量管理优化调度单元提供了输入；优化调度单元根据数据预测的预测结果、分时电价信息、上网功率阈值，已输入的负荷优先级、各并网逆变设备的额定容量、储能***充放电电压/SOC限值， 输出优化调度建议指令；运行控制单元根据***运行的实际工况给出修正建议指令。Further, the energy management advanced application module includes a data prediction unit, an optimization scheduling unit, and an operation control unit; the data prediction unit includes a photovoltaic prediction and a load prediction, and provides an input for the energy management optimization scheduling unit; and the optimization scheduling unit is configured according to Prediction results of data prediction, time-of-use electricity price information, power-on-net threshold, input load priority, rated capacity of each grid-connected inverter device, charge/discharge voltage/SOC limit of energy storage system, The output optimization scheduling recommendation instruction is provided; the operation control unit gives a correction suggestion instruction according to the actual working condition of the system operation.
本发明具有的优点和积极效果是：The advantages and positive effects of the present invention are:
1、突破了已有的仿真平台构建方法，避免了常规仿真平台对运行特性拟合度差的弊端。1. Breaking through the existing simulation platform construction method, avoiding the disadvantages of the conventional simulation platform's poor fit to the running characteristics.
2、可为新型微网设备测试及微网***工程前期仿真调试提供完全真实的环境，及时发现问题并在线修正，保障设备及工程运行的可靠性，极大减少设备研制及工程调试成本。2. It can provide a completely real environment for the testing of new micro-grid equipment and pre-simulation and debugging of micro-grid system engineering, timely discover problems and correct online, ensure the reliability of equipment and engineering operation, and greatly reduce equipment development and engineering commissioning costs.
附图说明DRAWINGS
图1是真实微电网特性动态仿真测试平台结构；Figure 1 shows the structure of a real micro-grid characteristic dynamic simulation test platform;
图2是物理微电网***结构；Figure 2 is a physical microgrid system structure;
图3是光伏***仿真模型构建示意图；3 is a schematic diagram of the construction of a photovoltaic system simulation model;
图4是光伏运行原理图；Figure 4 is a schematic diagram of photovoltaic operation;
图5是测控保护设备测试方式图；Figure 5 is a test mode diagram of the measurement and control protection device;
图6是变流器设备测试方式图。Figure 6 is a diagram showing the test mode of the converter device.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围，在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互组合。The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts, All of them fall within the scope of protection of the present invention, and the features of the embodiments and the embodiments of the present invention can be combined with each other without conflict.
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是本发明还可以采用其他不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似推广，因此本发明不受下面公开的具体实施例的限制。In the following description, numerous specific details are set forth in order to provide a full understanding of the present invention, but the invention may be practiced in other ways than those described herein, and those skilled in the art can do without departing from the scope of the invention. The invention is not limited by the specific embodiments disclosed below.
在本发明的描述中，需要理解的是：In the description of the present invention, it is to be understood that:
(1)模式控制器(1) Mode controller
可接受和反馈控制信号，控制开关，实现控制策略。Accept and feedback control signals, control switches, and implement control strategies.
(2)测控保护(2) Measurement and control protection
具有测量、采集和传输数的功能，也可保护线路，在线路发生异常时保护动作。It has the function of measuring, collecting and transmitting the number, and can also protect the line and protect the action when the line is abnormal.
(3)能量管理***(3) Energy Management System
能量管理***(Energy Management System)是以计算机技术和电力***应用软件技术为支撑的现代电力***综合自动化***，也是能量***和信息***的一体化或集成，一般包括数据收集、能量管理和网络分析三大功能。Energy Management System (Energy Management System) is a modern power system integrated automation system supported by computer technology and power system application software technology. It is also the integration or integration of energy systems and information systems, generally including data collection, energy management and network analysis. Three major functions.
(4)PCS(4) PCS
储能变流器(PCS)可控制蓄电池的充电和放电过程，进行交直流的变换，在无电网情况下可以直接为交流负荷供电。PCS由DC/AC双向变流器、控制单元等构成。The energy storage converter (PCS) can control the charging and discharging process of the battery, and convert the AC and DC. In the absence of the grid, the AC load can be directly supplied. The PCS is composed of a DC/AC bidirectional converter, a control unit, and the like.
(5)BMS (5) BMS
电池管理***(BMS)是电池与PCS之间的纽带，提高电池的利用率，防止电池出现过度充电和过度放电，延长电池的使用寿命，监控电池的状态。The Battery Management System (BMS) is the link between the battery and the PCS to improve battery utilization, prevent overcharging and over-discharging of the battery, extend battery life, and monitor battery status.
(6)HYPERSIM(6)HYPERSIM
HyperSim是由世界知名的电力***仿真实验室魁北克水电研发中心基于多年来对世界上最复杂输电***的研究而开发的电磁暂态仿真软件，是目前世界上唯一有能力实现10000+节点仿真分析的超大型电力***电磁暂态实时仿真的测试***。HyperSim is an electromagnetic transient simulation software developed by the world-renowned power system simulation laboratory Quebec Hydropower Research and Development Center based on years of research on the world's most complex transmission system. It is the only one in the world capable of achieving 10,000+ node simulation analysis. Test system for electromagnetic transient real-time simulation of very large power systems.
(7)eMEGAsim(7)eMEGAsim
eMEGAsim是专为大型电网及电力电子***的高精度实时仿真，快速控制原型(RCP)及硬件在环仿真测试(HIL)量身定做的高精度、多处理器实时仿真平台。它继承Opal-RT公司的eMEGAsim分布式并行处理思路，基于
Figure PCTCN2016101960-appb-000001
CoreTM2Quad多核处理器和FPGA技术，能在微秒以下的小步长实时运行，从而精确模拟目前电力***中的各种电磁暂态，在电力电子仿真领域得到了越来越广泛的应用。eMEGAsim is a high-precision, multi-processor real-time simulation platform tailored for high-precision real-time simulation, rapid control prototyping (RCP) and hardware-in-the-loop simulation testing (HIL) for large power grids and power electronics systems. It inherits Opal-RT's eMEGAsim distributed parallel processing ideas, based on
Figure PCTCN2016101960-appb-000001
The Core TM 2Quad multi-core processor and FPGA technology can run in real time in small steps below microseconds, accurately simulating various electromagnetic transients in current power systems, and has been used more and more widely in the field of power electronics simulation.
(8)基于RT-LAB的本发明(8) The present invention based on RT-LAB
HYPERSIM和eMEGAsim是OPRL-RT公司旗下的基于同一套RT-LAB硬件设备的两种不同仿真平台。本发明运用HYPERSIM和eMEGAsim双仿真***，结合实时数据通信技术，构建具有真实运行特性的仿真测试环境，可提高设备和***仿真测试与实际运行时的结果一致性，同时亦可为微网工程建设的前期调试工作提供建议。HYPERSIM and eMEGAsim are two different simulation platforms based on the same RT-LAB hardware device from OPRL-RT. The invention uses HYPERSIM and eMEGAsim dual simulation system, combined with real-time data communication technology, to construct a simulation test environment with real operating characteristics, which can improve the consistency of the results of equipment and system simulation test and actual operation, and can also be used for micro-network engineering construction. Advance commissioning work provides advice.
下面结合附图及具体实施例对本发明做进一步说明。 The invention will be further described below in conjunction with the drawings and specific embodiments.
本发明所建设的真实微网特性动态仿真测试平台，不仅包含有实际微网中使用的光伏、储能等设备模型，也构建了常用的柴油发电机等设备模型，以及测控保护装置、模式控制器、不同敏感度的负荷模型等。仿真测试平台支持二次开发，可拓展新款设备，构建新的微电网组合。仿真测试平台与实际微电网共用一套微网能量管理***，仿真***界面上的电气测量数据与实际微电网“四遥”数据同步显示。主要结构如图1所示。The real micro-network characteristic dynamic simulation test platform constructed by the invention not only includes the equipment model of photovoltaic and energy storage used in the actual micro-network, but also constructs a common diesel generator and other equipment models, as well as the measurement and control protection device and mode control. Load models with different sensitivities. The simulation test platform supports secondary development, which can expand new equipment and build a new microgrid combination. The simulation test platform shares a set of microgrid energy management system with the actual microgrid. The electrical measurement data on the interface of the simulation system is displayed synchronously with the actual “four remote” data of the microgrid. The main structure is shown in Figure 1.
仿真测试平台主要包含物理微电网***、RT-LAB仿真***、通信***、MODBUS模块、功率放大器、微电网能量管理***，下面对各***进行详细说明。The simulation test platform mainly includes physical microgrid system, RT-LAB simulation system, communication system, MODBUS module, power amplifier, and microgrid energy management system. The following describes each system in detail.
一、物理微电网***：First, the physical microgrid system:
真实微电网物理***是一个多层嵌套式交直流混合微网群，涉及的主要设备包括光伏、储能、地源热泵、氢燃料电池等。具体结构如图2所示。The real microgrid physical system is a multi-layer nested AC/DC hybrid microgrid group. The main equipments involved include photovoltaic, energy storage, ground source heat pump and hydrogen fuel cell. The specific structure is shown in Figure 2.
其中，物理微电网***包括一个光储主微网，两个光储子微网和一个直流子微网，均通过微网能量管理***进行统一监控和运行调度。实际微网采用“即插即用”的方式，每一个子微网均有着较主微网低一级的保护配置，因此在单个设备或控制模块的测试过程当中出现过压、过流或电能质量超标等情况时，该设备或子微网将会首先自动脱离主网，在测试过程中不影响其他子微网和整体微电网***的正常运行。The physical microgrid system includes an optical storage master microgrid, two optical storage microgrids and a DC submicrogrid, all of which are uniformly monitored and operated by the microgrid energy management system. The actual microgrid adopts the “plug and play” approach. Each submicrogrid has a lower level of protection configuration than the main microgrid, so overvoltage, overcurrent or electrical energy occurs during the testing process of a single device or control module. When the quality exceeds the standard, the device or sub-micro network will automatically leave the main network first, and does not affect the normal operation of other sub-micro networks and the overall micro-grid system during the test.
①主微网为光伏和锂电池储能构建交流微电网结构； 1 The main microgrid builds an AC microgrid structure for photovoltaic and lithium battery energy storage;
②光储灌溉***是通过光伏和储能构建交流子微电网，为灌溉水泵和照明灯供电，实现微电网在绿色灌溉方面的应用；2 The optical storage irrigation system is to construct a communication sub-microgrid through photovoltaic and energy storage, to supply irrigation water pumps and lighting lamps, and to realize the application of microgrid in green irrigation;
③综合能源供应***是通过光伏和储能构建交流子微电网，为地源热泵和照明灯供电，实现微电网在冷热电综合能源供应方面的应用；3 The integrated energy supply system is to build a communication sub-microgrid through photovoltaic and energy storage, to supply ground source heat pump and lighting, and to realize the application of microgrid in the integrated energy supply of cold and heat;
④直流微网是构建光储直流子微网，并通过大型变流器并网，为***内的直流LED照明灯供电。4 DC microgrid is to build a light storage DC sub-grid, and connect to the DC LED lighting in the system through a large converter.
***内的所有储能***均包含有锂电池、BMS、PCS等主要装置，光伏***包含有光伏电池和逆变器。储能PCS运行策略主要为恒压/恒频控制(V-f)、恒功率控制(PQ)和下垂控制(Droop)等控制方法。在并网运行时，PCS运行在PQ模式，为***提供或吸收电能；当外界电网断电时，主微网PCC点断开，主微网储能运行策略由PQ切换为V-f模式，为***提供电压频率支撑，子微网储能仍运行在PQ模式；当主微网不能供电时，子微网亦可无缝切换至离网运行，此时子微网内储能***运行在V-f模式。All energy storage systems in the system contain major devices such as lithium batteries, BMS, PCS, etc. The photovoltaic system contains photovoltaic cells and inverters. The energy storage PCS operation strategy mainly includes control methods such as constant voltage/constant frequency control (V-f), constant power control (PQ) and droop control (Droop). When connected to the grid, the PCS runs in the PQ mode to provide or absorb power for the system. When the external grid is powered off, the main micro-network PCC point is disconnected, and the main micro-network energy storage operation strategy is switched from PQ to Vf mode. The voltage and frequency support is provided, and the sub-microgrid energy storage still operates in the PQ mode; when the main microgrid cannot supply power, the sub-microgrid can also seamlessly switch to the off-grid operation, and the energy storage system in the sub-microgrid runs in the Vf mode.
二、RT-LAB仿真***：Second, RT-LAB simulation system:
包括仿***机和实时目标机，两套硬件设备(OP5600)，分别采用HYPERSIM和eMEGAsim软件***。其中使用HYPERSIM搭建配电网模型，可模拟正常和故障(包括电压波动、频率波动、对称或不对称短路、雷击、线路断开等电网故障)情况下的配电网；使用eMEGAsim搭建配电变压器及以下含有电力电子设备较多的微电网仿真模型。通过OP5607实现两个***之间的通信，将HYPERSIM配电网线路终端输出电压、电流信号，经OP5607传输给eMEGAsim当中的配电变压器高 压侧，组建微电网并网结构。Including emulation host and real-time target machine, two sets of hardware devices (OP5600), respectively using HYPERSIM and eMEGAsim software system. Using HYPERSIM to build a distribution network model, it can simulate the distribution network under normal and fault conditions (including voltage fluctuations, frequency fluctuations, symmetric or asymmetric short circuits, lightning strikes, line disconnection, etc.); use eMEGAsim to build distribution transformers. And the following micro-grid simulation models with many power electronic devices. The communication between the two systems is realized by OP5607, and the output voltage and current signals of the HYPERSIM distribution network line terminal are transmitted to the distribution transformer in eMEGAsim via OP5607. Press the side to form a microgrid grid structure.
配电网和微电网模型均包括两种类型，一种搭建符合实际设备特性的纯数字模型，另一种是受控源模型(采集物理微电网对应设备的电压电流数据，经过功率放大器后传输入模型做为控制量)。下面以光伏并网结构为例，就仿真测试平台如何实现真实设备信息接入以及如何实现控制器测试作详细说明。Both the distribution network and the microgrid model include two types, one is to build a pure digital model that meets the actual equipment characteristics, and the other is a controlled source model (acquisition of voltage and current data corresponding to the physical microgrid, after passing through the power amplifier The input model is used as the control amount). The following takes the photovoltaic grid-connected structure as an example to explain how the simulation test platform implements real device information access and how to implement controller testing.
如图3所示，同步运行时模拟微网***中电侧和光伏设备由实际信号控制；光伏逆变控制器(板)的信号采集来自实际微网***，同时控制实际微网和模拟微网中的IGBT；待测的测控保护单元的信号采集来自模拟微网***(实现对故障信号的响应)，同时控制实际微网和模拟微网中的继电器，完成对待测设备性能试。As shown in Figure 3, the electrical side and photovoltaic equipment in the synchronous microgrid system are controlled by actual signals; the signal acquisition of the photovoltaic inverter controller (board) comes from the actual microgrid system, and the actual microgrid and analog microgrid are controlled. The IGBT in the test; the signal acquisition of the measurement and control protection unit to be tested comes from the analog microgrid system (to achieve the response to the fault signal), and simultaneously controls the relays in the actual microgrid and the analog microgrid to complete the performance test of the device under test.
在仿真模拟***中，光伏设备可以自行运行，也可以由外部控制运行，其原理如图4所示。In the simulation system, the photovoltaic device can run by itself or by external control. The principle is shown in Figure 4.
三、通信***：Third, the communication system:
I/O模块主要用于物理微电网***与模拟微电网***之间数字量与模拟量的传输与转换，例如光伏变流器的SVPWM波，可通过接收物理微电网***输入的模拟量数据，将之转换为数字量控制信号，再对仿真***当中构建的光伏变流器主电路进行控制，实现变流器输出特性的真实化。The I/O module is mainly used for the transmission and conversion of digital and analog quantities between the physical microgrid system and the analog microgrid system, such as the SVPWM wave of the photovoltaic converter, which can receive the analog data input by the physical microgrid system. It is converted into a digital control signal, and then the main circuit of the photovoltaic converter built in the simulation system is controlled to realize the realization of the output characteristics of the converter.
四、MODBUS模块：Fourth, MODBUS module:
可实现测控保护等二次设备与物理和模拟微电网***之间的通信连接，用于进行测控保护装置开发与测试时数据的传输。 It can realize the communication connection between the secondary equipment such as measurement and control protection and the physical and analog microgrid system, and is used for data transmission during the development and testing of the measurement and control protection device.
五、功率放大器：Five, power amplifier:
为四象限功率变换装置，可实现三相或单相模拟量输入和输出符合实时仿真机工作环境要求。For the four-quadrant power conversion device, the three-phase or single-phase analog input and output can meet the requirements of the real-time simulator working environment.
六、微网能量管理***(MEMS)：Sixth, microgrid energy management system (MEMS):
微网能量管理***分为数据采集监控和能量管理高级应用两大模块。The microgrid energy management system is divided into two modules: data acquisition monitoring and energy management advanced application.
(1)数据采集监控***作为MEMS的数据中枢，除为其他模块提供数据源外，还能接受其他模块发出的指令，可实现对***内所有设备与负荷运行状态的实时监控、实时数据分析和历史存储查询。(1) Data acquisition and monitoring system As the data center of MEMS, in addition to providing data source for other modules, it can also accept commands from other modules, real-time monitoring and real-time data analysis of all equipment and load operation status in the system. Historical storage query.
(2)能量管理高级应用模块是MEMS的核心模块，它决定了MEMS的行为，决定了MEMS的智能化程度。能量管理模块可以根据微电网运行模式综合考虑分布式电源及储能***的现有运行状态，用户负荷供电等级，数据预测参考等信息决策、调整微电网实时运行状态。能量管理高级应用模块主体功能包括：数据预测、优化调度、运行控制。其中，数据预测算法包括光伏预测及负荷预测，为能量管理优化调度算法提供了输入。能量管理算法包括优化调度和运行控制两部分。优化调度算法会根据数据预测的预测结果、分时电价信息(包括买电及卖电价格)、上网功率阈值，已输入的负荷优先级、各并网逆变设备的额定容量、储能***充放电电压/SOC限值，输出优化调度建议指令。运行控制算法根据***运行的实际工况给出修正建议指令。用户可以自行决定建议指令是否自动下发。(2) Energy management The advanced application module is the core module of MEMS, which determines the behavior of MEMS and determines the degree of intelligence of MEMS. The energy management module can comprehensively consider the existing operating states of the distributed power supply and energy storage system, the user load power supply level, the data prediction reference and other information decisions according to the micro-grid operation mode, and adjust the real-time operation state of the micro-grid. The main functions of the energy management advanced application module include: data prediction, optimized scheduling, and operational control. Among them, the data prediction algorithm includes photovoltaic prediction and load prediction, and provides input for the energy management optimization scheduling algorithm. The energy management algorithm includes two parts: optimized scheduling and operational control. The optimized scheduling algorithm will predict the predicted results based on the data, the time-of-use price information (including the price of buying and selling electricity), the power-on threshold, the input load priority, the rated capacity of each grid-connected inverter device, and the energy storage system. Discharge voltage / SOC limit, output optimization scheduling recommendations. The operation control algorithm gives a correction suggestion instruction according to the actual working conditions of the system operation. The user can decide whether the instruction is automatically delivered.
本测试平台可基于多层嵌套式微网真实运行特性进行微网关键 设备测试、新结构微网运行稳定性测试，以及不同组网形式下的微网优化调度策略测试。This test platform can be based on the real-time operation characteristics of multi-layer nested micro-grid Equipment testing, new structure micro-network operation stability test, and micro-network optimization scheduling strategy test in different networking forms.
由于实际微网采用“即插即用”的方式，因此在检测中心可以实现单个设备性能检测、新结构微电网的可靠性检测以及控制策略的定制开发等。Since the actual microgrid adopts the "plug and play" method, the detection center can realize the performance detection of a single device, the reliability detection of the new structure microgrid, and the customized development of the control strategy.
实际微网当中每一个子微网均有着较主微网低一级的保护配置，因此在单个设备或控制模块的测试过程当中出现过压、过流或电能质量超标时，子微网将会自动脱离主网重启，因此在测试过程中不影响整体微电网***正常运行。Each sub-microgrid in the actual microgrid has a lower level of protection configuration than the main microgrid. Therefore, when overvoltage, overcurrent, or power quality exceeds the standard during the test of a single device or control module, the sub-microgrid will Automatically disconnected from the main network, so it does not affect the normal operation of the overall microgrid system during the test.
1、新型微电网设备性能检测1. New micro-grid equipment performance test
(1)继电保护设备检测(1) Detection of relay protection equipment
实测继电保护设备对某个并网开关的控制策略，先将该保护设备控制信号接入eMAGAsim仿真***中的对应模型信号接收点，通过eMAGAsim仿真***仿真故障情况，或者通过HYPERSIM***模拟电网故障，故障类型包括电压波动、频率波动、对称短路、不对称短路、断线、电压跌落等情况。实时分析保护设备动作策略和灵敏度，仿真***当中可实时观察并记录该保护设备运行和动作状态。可在设备实际应用于微网工程建设前，最大限度找出隐患，提高设备运行可靠性。如图5所示。The control strategy of the measured relay protection device to a grid-connected switch first connects the protection device control signal to the corresponding model signal receiving point in the eMAGAsim simulation system, simulates the fault condition through the eMAGAsim simulation system, or simulates the grid fault through the HYPERSIM system. The fault types include voltage fluctuations, frequency fluctuations, symmetrical short circuits, asymmetric short circuits, disconnections, voltage drops, and the like. The real-time analysis of the protection device action strategy and sensitivity, the simulation system can observe and record the protection device operation and action status in real time. Before the equipment is actually applied to the construction of the micro-grid project, it can maximize the hidden dangers and improve the operational reliability of the equipment. As shown in Figure 5.
(2)PCS等控制模块检测(2) PCS and other control module detection
如图6所示，将被测PCS设备替换当前实际***中的PCS，将脉冲调节信号接入eMAGAsim仿真***对应的PCS当中，通过仿真 平台模拟负荷投切、电源并离网、光照风速等外界资源突变、运行模式切换等，通过不断进行在线调试参数，使得设备运行输出波形可以达到预期结果，同时可进一步在整体微网环境当中，进行***级测试，实时跟踪记录该PCS在不同工况的暂稳态变化。以发现设备在真实***运行当中出现的问题，并重复进行测试与解决，以提高设备在实际微网当中运行的可靠性。As shown in FIG. 6, the PCS device to be tested is replaced with the PCS in the current actual system, and the pulse adjustment signal is connected to the PCS corresponding to the eMAGAsim simulation system, and the simulation is performed. The platform simulates load switching, power supply and off-grid, light wind speed and other external resource mutations, operation mode switching, etc., through continuous online debugging parameters, so that the device operation output waveform can achieve the expected results, and can further in the overall micro-network environment, System-level testing is performed to record the transient steady-state changes of the PCS under different operating conditions in real time. In order to discover the problems that occur in the operation of the real system, and repeat the test and solution to improve the reliability of the device running in the actual micro network.
2、组建新结构微电网***测试2, set up a new structure microgrid system test
对于新结构的微网，可以通过在现有设备模型的基础上加入生物质和柴油发电机等微源，所有设备的实际控制板均可接入测试平台当中进行硬件在环仿真，对于没有控制板的设备，亦可用最逼近实际设备特性的模型替代。通过能量管理***对仿真***的微网进行运行调度控制，可实现并离网切换，暂稳态运行仿真分析，以及发电预测及负荷预测、秒级调度和中长期调度等运行策略的测试与分析等功能。For the new structure of the microgrid, micro-sources such as biomass and diesel generators can be added on the basis of the existing equipment model, and the actual control boards of all the equipments can be connected to the test platform for hardware-in-the-loop simulation, for no control. The board's equipment can also be replaced with a model that is closest to the actual equipment characteristics. Through the energy management system, the operation scheduling control of the micro-grid of the simulation system can realize the off-grid handover, the transient steady-state operation simulation analysis, and the test and analysis of the operation strategies such as power generation prediction and load forecasting, second-level scheduling and medium- and long-term scheduling. And other functions.
以上对本发明的实施例进行了详细说明，但所述内容仅为本发明的较佳实施例，不能被认为用于限定本发明的实施范围。凡依本发明申请范围所作的均等变化与改进等，均应仍归属于本发明的专利涵盖范围之内。 The embodiments of the present invention have been described in detail above, but are not intended to limit the scope of the present invention. All changes and improvements made in accordance with the scope of the present application should still fall within the scope of the patents of the present invention.

Claims (9)

  1. 一种基于RT-LAB的真实微电网运行动态仿真测试平台，其特征在于，包括物理微电网***、RT-LAB仿真***、通信***、微电网能量管理***；A real micro-grid operation dynamic simulation test platform based on RT-LAB, which is characterized by comprising a physical micro-grid system, an RT-LAB simulation system, a communication system, and a micro-grid energy management system;
    所述物理微电网***与RT-LAB仿真***共用一套微电网能量管理***，所述微电网能量管理***实现对***内所有设备与负荷运行状态的实时监控、实时数据分析和历史存储查询，以及根据微电网运行模式综合考虑信息决策、调整微电网实时运行状态；The physical microgrid system shares a set of microgrid energy management system with the RT-LAB simulation system, and the microgrid energy management system realizes real-time monitoring, real-time data analysis and historical storage query of all equipment and load operating states in the system. And comprehensively consider information decision according to the operation mode of the microgrid, and adjust the real-time running state of the microgrid;
    所述物理微电网***与RT-LAB仿真***之间通过通信***实现数字量与模拟量的传输与转换；The transmission and conversion of the digital quantity and the analog quantity are implemented between the physical micro grid system and the RT-LAB simulation system through the communication system;
    所述RT-LAB仿真***包括使用HYPERSIM软件***搭建的配电网仿真模型、使用eMEGAsim软件***搭建的配电变压器及以下含有电力电子设备的微电网仿真模型，所述配电网模型和微电网仿真模型都是受控源模型，即采集物理微电网***对应设备的数据，传输入模型做为控制量。The RT-LAB simulation system includes a distribution network simulation model built using the HYPERSIM software system, a distribution transformer built using the eMEGAsim software system, and the following micro-grid simulation model containing power electronic equipment, the distribution network model and the microgrid The simulation models are all controlled source models, that is, the data of the corresponding devices of the physical microgrid system are collected, and transmitted into the model as the control amount.
  2. 根据权利要求1所述的一种基于RT-LAB的真实微电网运行动态仿真测试平台，其特征在于，所述物理微电网***是一个多层嵌套式交直流混合微网群。The RT-LAB-based real microgrid operation dynamic simulation test platform according to claim 1, wherein the physical microgrid system is a multi-layer nested AC/DC hybrid microgrid group.
  3. 根据权利要求2所述的一种基于RT-LAB的真实微电网运行动态仿真测试平台，其特征在于，所述物理微电网***包括一个光储主微网，两个光储子微网和一个直流子微网，均通过微网能量管理***进行统一监控和运行调度；子微网采用即插即用的方式，每一个子 微网均有较主微网低一级的保护配置。The RT-LAB-based real microgrid operation dynamic simulation test platform according to claim 2, wherein the physical microgrid system comprises an optical storage main microgrid, two optical storage microgrids and a DC subroutine. The micro-grid is uniformly monitored and operated by the micro-grid energy management system; the sub-micronet adopts a plug-and-play method, each sub-network The microgrid has a lower level of protection than the main microgrid.
  4. 根据权利要求3所述的一种基于RT-LAB的真实微电网运行动态仿真测试平台，其特征在于，光储主微网为光伏和锂电池储能构建交流微电网结构；两个光储子微网包括光储灌溉***和综合能源供应***；光储灌溉***是通过光伏和储能构建交流子微电网，为灌溉水泵和照明灯供电，实现微电网在绿色灌溉方面的应用；综合能源供应***是通过光伏和储能构建交流子微电网，为地源热泵和照明灯供电，实现微电网在冷热电综合能源供应方面的应用；直流子微网是构建光储直流子微网，并通过大型变流器并网，为***内的直流LED照明灯供电。The RT-LAB-based real microgrid operation dynamic simulation test platform according to claim 3, wherein the optical storage main microgrid constructs an alternating microgrid structure for photovoltaic and lithium battery energy storage; and two optical storage microgrids Including optical storage irrigation system and integrated energy supply system; optical storage irrigation system is to build communication sub-microgrid through photovoltaic and energy storage, to supply irrigation water pump and lighting, to realize the application of microgrid in green irrigation; integrated energy supply system is The photovoltaic sub-grid is constructed by photovoltaic and energy storage, and the ground source heat pump and the illumination lamp are powered to realize the application of the micro-grid in the integrated energy supply of the cold and heat electricity; the DC sub-grid is to construct the optical storage DC sub-grid and pass the large-scale The converter is connected to the grid to supply power to the DC LED lighting in the system.
  5. 根据权利要求1所述的一种基于RT-LAB的真实微电网运行动态仿真测试平台，其特征在于，所述RT-LAB仿真***中，将HYPERSIM配电网仿真模型的线路终端输出电压、电流信号，传输给eMEGAsim微电网仿真模型中的配电变压器高压侧，组建微电网并网结构。The RT-LAB-based real microgrid operation dynamic simulation test platform according to claim 1, wherein in the RT-LAB simulation system, the line terminal output voltage and current of the HYPERSIM distribution network simulation model are The signal is transmitted to the high voltage side of the distribution transformer in the eMEGAsim microgrid simulation model to form a microgrid interconnection structure.
  6. 根据权利要求1所述的一种基于RT-LAB的真实微电网运行动态仿真测试平台，其特征在于，所述物理微电网***的配电网侧的待测的测控保护装置的电压电流数据，经过通信***的功率放大器后传输入所述RT-LAB仿真***的配电网侧做为控制量；所述物理微电网***的光伏设备侧的测控保护装置的电流数据，经过通信***的功率放大器后传输入所述RT-LAB仿真***的光伏设备侧做为控制量；所述物理微电网***的光伏变流器的SVPWM波，通过通信***的I/O 模块，转换为数字量控制信号，对所述RT-LAB仿真***当中构建的光伏变流器主电路进行控制。The RT-LAB-based real microgrid operation dynamic simulation test platform according to claim 1, wherein the voltage and current data of the measurement and control protection device to be tested on the distribution network side of the physical microgrid system, After the power amplifier of the communication system is transmitted into the distribution network side of the RT-LAB simulation system as a control quantity; the current data of the measurement and control protection device of the photovoltaic device side of the physical micro grid system passes through the power amplifier of the communication system The photovoltaic device side that is transmitted into the RT-LAB simulation system is used as a control amount; the SVPWM wave of the photovoltaic converter of the physical microgrid system passes through the I/O of the communication system The module is converted into a digital control signal to control the main circuit of the photovoltaic converter constructed in the RT-LAB simulation system.
  7. 根据权利要求6所述的一种基于RT-LAB的真实微电网运行动态仿真测试平台，其特征在于，所述测控保护装置通过MODBUS模块与所述物理微电网***、RT-LAB仿真***进行通信连接。The RT-LAB-based real microgrid operation dynamic simulation test platform according to claim 6, wherein the measurement and control protection device communicates with the physical microgrid system and the RT-LAB simulation system through a MODBUS module. connection.
  8. 根据权利要求1所述的一种基于RT-LAB的真实微电网运行动态仿真测试平台，其特征在于，所述微电网能量管理***分为数据采集监控模块和能量管理高级应用模块；所述数据采集监控模块提供数据源、接受指令，并对所有设备与负荷运行状态进行实时监控、实时数据分析和历史存储查询；所述能量管理高级应用模块根据微电网运行模式综合考虑分布式电源及储能***的现有运行状态、用户负荷供电等级、数据预测参考等信息决策，调整微电网实时运行状态。The RT-LAB-based real microgrid operation dynamic simulation test platform according to claim 1, wherein the microgrid energy management system is divided into a data acquisition monitoring module and an energy management advanced application module; The acquisition monitoring module provides data sources, accepts commands, and performs real-time monitoring, real-time data analysis, and historical storage query on all equipment and load operating states; the energy management advanced application module comprehensively considers distributed power and energy storage according to the micro-grid operating mode. The system's existing operating status, user load power supply level, data prediction reference and other information decisions, adjust the real-time operating status of the micro-grid.
  9. 根据权利要求8所述的一种基于RT-LAB的真实微电网运行动态仿真测试平台，其特征在于，所述能量管理高级应用模块包括数据预测单元、优化调度单元、运行控制单元；所述数据预测单元包括光伏预测及负荷预测，为能量管理优化调度单元提供了输入；优化调度单元根据数据预测的预测结果、分时电价信息、上网功率阈值，已输入的负荷优先级、各并网逆变设备的额定容量、储能***充放电电压/SOC限值，输出优化调度建议指令；运行控制单元根据***运行的实际工况给出修正建议指令。 The RT-LAB-based real microgrid operation dynamic simulation test platform according to claim 8, wherein the energy management advanced application module comprises a data prediction unit, an optimization scheduling unit, and an operation control unit; The prediction unit includes photovoltaic prediction and load prediction, and provides input for the energy management optimization scheduling unit; the optimization scheduling unit predicts the predicted result according to the data, the time-of-use electricity price information, the power-on power threshold, the input load priority, and each grid-connected inverter The rated capacity of the equipment, the charging/discharging voltage/SOC limit of the energy storage system, and the output optimization scheduling suggestion instruction; the operation control unit gives the correction suggestion instruction according to the actual working condition of the system operation.
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