CN103117564B - Coordinated control system and method for wind-solar hybrid power generation - Google Patents
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Abstract
本发明提供一种风光互补发电协调控制系统和方法，所述风光互补发电协调控制系统包括系统主站和系统从站，所述系统主站和系统从站通过工业以太网进行通信连接。本发明采用了分布式结构，系统主站和系统从站之间采用工业以太网进行连接，可以实现大量数据的快速传送；采用GPRS或CDMA无线通信方式与监控中心实现信息的交互，可以避免由于边远基站地处海岛、沙漠等地理环境限制而无法进行有线通信，或者由于长距离的通讯线连接可能导致的信号干扰等问题，且围绕蓄电池的有效充放电和正常运行而开展，既保障了边远通信基站的可靠供电，又延长了蓄电池的使用寿命。
The present invention provides a coordinated control system and method for wind-solar hybrid power generation. The wind-solar hybrid power generation coordinated control system includes a system master station and a system slave station, and the system master station and system slave stations are connected through industrial Ethernet. The present invention adopts the distributed structure, adopts industrial Ethernet to connect between the system master station and the system slave station, can realize the rapid transmission of a large amount of data; Adopt GPRS or CDMA wireless communication mode and realize the interaction of information with the monitoring center, can avoid the Remote base stations are located in islands, deserts and other geographical environments where wired communication is impossible, or signal interference may be caused by long-distance communication line connections, and are carried out around the effective charging and discharging of batteries and normal operation, which not only ensures remote The reliable power supply of the communication base station prolongs the service life of the battery.
Description
技术领域technical field
本发明属于电力自动化领域，具体涉及一种风光互补发电协调控制系统和方法。The invention belongs to the field of electric power automation, and in particular relates to a coordinated control system and method for wind-solar complementary power generation.
背景技术Background technique
由于我国的国民生活水平持续提高，手机的普及率越来越高，对于移动信号的覆盖面也要求越来越广，通信基站的建设从市区、乡村逐步向地处偏远的海岛、高山、沙漠覆盖，这些边远的通信基站由于受到地理环境的约束无法接入市电。利用风力发电技术和光伏发电技术构成的风光互补电站，为边远通信基站提供部分或全部电能，从而弥补由于市电无法接入而造成的电力供应不足。基站的通信设备大多数需要直流电源供电，而风光互补电站中，光伏太阳能发电发出的是直流电，可以直接或以串联的方式提供满足这些设备要求的直流电源。Due to the continuous improvement of our country's national living standards, the penetration rate of mobile phones is getting higher and higher, and the coverage of mobile signals is also becoming wider and wider. The construction of communication base stations has gradually shifted from urban areas and villages to remote islands, mountains, and deserts. Coverage, these remote communication base stations cannot be connected to the mains due to the constraints of the geographical environment. The wind-solar hybrid power station composed of wind power generation technology and photovoltaic power generation technology can provide part or all of the electric energy for remote communication base stations, so as to make up for the insufficient power supply caused by the inaccessibility of mains power. Most of the communication equipment in the base station needs DC power supply, while in the wind-solar hybrid power station, the photovoltaic solar power generates DC power, which can directly or in series provide DC power that meets the requirements of these devices.
对于基站中其它需要交流供电的设备，则可通过风力发电、柴油发电发出的交流电，或者通过太阳能发电增加DC/AC逆变器来满足这些设备要求的交流电源。随着市场竞争的加剧，移动通信用户对网络质量的要求越来越高，由于停电而导致基站退服的现象也必须尽量避免。为保障边远基站的可靠供电，风光互补电站还需要配置较大容量的蓄电池。由于边远基站都是无人值守，且地处偏远，所以对于风光互补发电系统需要配置全自动的协调控制系统和完善的协调控制策略。For other equipment in the base station that needs AC power supply, the AC power generated by wind power generation, diesel power generation, or a DC/AC inverter can be added through solar power generation to meet the AC power requirements of these equipment. With the intensification of market competition, mobile communication users have higher and higher requirements for network quality, and the outage of base stations due to power outages must also be avoided as much as possible. In order to ensure the reliable power supply of remote base stations, wind-solar hybrid power stations also need to be equipped with larger-capacity batteries. Since remote base stations are unattended and located in remote locations, a fully automatic coordinated control system and a complete coordinated control strategy must be configured for the wind-solar hybrid power generation system.
发明内容Contents of the invention
为了克服上述现有技术的不足，本发明提供一种风光互补发电协调控制系统和方法，采用了分布式结构，系统主站和系统从站之间采用工业以太网进行连接，可以实现大量数据的快速传送；采用GPRS或CDMA无线通信方式与监控中心实现信息的交互，可以避免由于边远基站地处海岛、沙漠等地理环境限制而无法进行有线通信，或者由于长距离的通讯线连接可能导致的信号干扰等问题。In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a coordinated control system and method for wind-solar hybrid power generation, which adopts a distributed structure, and industrial Ethernet is used to connect the system master station and system slave stations, which can realize a large amount of data Fast transmission; use GPRS or CDMA wireless communication to realize information interaction with the monitoring center, which can avoid the inability to carry out wired communication due to geographical restrictions such as remote base stations located in islands and deserts, or the signal that may be caused by long-distance communication line connections interference etc.
为了实现上述发明目的，本发明采取如下技术方案：In order to realize the above-mentioned purpose of the invention, the present invention takes the following technical solutions:
提供一种风光互补发电协调控制系统，所述风光互补发电协调控制系统包括系统主站和系统从站，所述系统主站和系统从站通过工业以太网进行通信连接。A coordinated control system for wind-solar hybrid power generation is provided, and the wind-solar hybrid power generation coordinated control system includes a system master station and a system slave station, and the system master station and the system slave station are connected through industrial Ethernet for communication.
所述系统主站包括主控制器和液晶显示器，所述主控制器采用PC机或嵌入式PC。The main station of the system includes a main controller and a liquid crystal display, and the main controller adopts a PC or an embedded PC.
所述主控制器采用工业以太网网卡与所述就地终端进行通信，并采用GPRS或CDMA与监控中心进行无线通信。The main controller uses an industrial Ethernet network card to communicate with the local terminal, and uses GPRS or CDMA to communicate wirelessly with the monitoring center.
所述系统从站包括就地终端，所述就地终端包括光伏发电终端、风力发电终端、柴油发电终端、蓄电池终端、环境监测终端和负载终端；所述负载终端包括重要通信负载终端、次要通信负载终端和交流负载终端。The system slave station includes on-site terminals, and the on-site terminals include photovoltaic power generation terminals, wind power generation terminals, diesel power generation terminals, storage battery terminals, environmental monitoring terminals and load terminals; the load terminals include important communication load terminals, secondary Communication load terminal and AC load terminal.
所述重要通信负载终端包括收发信机、传输管理机、传输扩展设备和卫星设备；所述次要通信负载终端包括光端机、数据业务设备、天线和发射塔。The important communication load terminals include transceivers, transmission management machines, transmission expansion equipment and satellite equipment; the secondary communication load terminals include optical transceivers, data service equipment, antennas and transmission towers.
所述光伏发电终端、风力发电终端、柴油发电终端、蓄电池终端、环境监测终端和负载终端均采用工业以太网芯片和应用层CPU芯片，所述工业以太网芯片与所述工业以太网进行数据交换，所述应用层CPU芯片进行AD采样、数据计算与处理、开关量输入信号处理和控制继电器输出处理。The photovoltaic power generation terminal, wind power generation terminal, diesel power generation terminal, storage battery terminal, environmental monitoring terminal and load terminal all use industrial Ethernet chips and application layer CPU chips, and the industrial Ethernet chips exchange data with the industrial Ethernet , the application layer CPU chip performs AD sampling, data calculation and processing, digital input signal processing and control relay output processing.
风光互补发电系统包括风光互补发电协调控制系统、光伏发电设备、风力发电机、柴油发电机和蓄电池。The wind-solar hybrid power generation system includes a wind-solar hybrid power generation coordinated control system, photovoltaic power generation equipment, wind power generators, diesel generators and batteries.
同时提供一种风光互补发电协调控制方法，所述方法包括以下步骤：At the same time, a coordinated control method for wind-solar hybrid power generation is provided, and the method includes the following steps:
步骤1：采集环境信息和动力信息：Step 1: Collect environmental information and power information:
步骤2：计算光伏发电设备输出功率PPV、风力发电机输出功率PWT、柴油发电机输出功率PDE和负载容量PL，并计算负载容量PL与电源总功率PS的差值Pnet，Pnet=PL-PS，其中：PS=PPV+PWT+PDE；Step 2: Calculate the output power P PV of the photovoltaic power generation equipment, the output power P WT of the wind turbine, the output power P DE of the diesel generator and the load capacity P L , and calculate the difference P net between the load capacity P L and the total power P S of the power supply , P net =P L -P S , where: P S =P PV +P WT +P DE ;
步骤3：判断Pnet是否大于0，若是则执行步骤4，若否则执行步骤6；Step 3: Determine whether P net is greater than 0, if so, execute step 4, otherwise execute step 6;
步骤4：判断当前蓄电池的荷电状态SOCt是否大于等于蓄电池的荷电状态下限SOCmin，若是则执行步骤5，若否则减少负载并对蓄电池充电后，执行步骤8；Step 4: Judging whether the current state of charge SOC t of the battery is greater than or equal to the lower limit SOC min of the battery state of charge, if so, perform step 5, otherwise, after reducing the load and charging the battery, perform step 8;
步骤5：判断蓄电池能否完全供给Pnet，若是则由蓄电池供给Pnet后执行步骤8，若否则减少负载终端后执行步骤8；Step 5: Determine whether the battery can fully supply P net , if so, perform step 8 after the battery supplies P net , otherwise, perform step 8 after reducing the load terminal;
步骤6：判断当前蓄电池的荷电状态SOCt是否小于等于蓄电池的荷电状态上限SOCmax，若是则执行步骤7，若否则增加负载或减少柴油发电机出力后执行步骤8；Step 6: Determine whether the current state of charge SOC t of the battery is less than or equal to the upper limit SOC max of the battery state of charge, if so, perform step 7, otherwise, increase the load or reduce the output of the diesel generator and then perform step 8;
步骤7：对蓄电池充电，并判断是否能完全吸纳|Pnet|，若是则|Pnet|全部用于对蓄电池充电后，执行步骤8；若否则先对蓄电池充电，再增加负载或减少柴油发电机出力后，执行步骤8；Step 7: Charge the battery, and judge whether |P net | can be fully absorbed, if yes, all of |P net | is used to charge the battery, then go to step 8; otherwise, charge the battery first, then increase the load or reduce diesel power generation After the engine works, go to step 8;
步骤8：计算下一时刻蓄电池的荷电状态SOCt+1。Step 8: Calculate the state of charge SOC t+1 of the battery at the next moment.
所述步骤1中，通过环境监测终端采集环境信息，所述环境信息包括环境温度、太阳辐射度和风速，所述动力信息包括柴油发电机出力、负载电流和负载电压；通过柴油发电机采集柴油发电机出力，并通过负载终端采集负载电流和负载电压。In the step 1, collect environmental information through the environmental monitoring terminal, the environmental information includes ambient temperature, solar radiation and wind speed, and the power information includes diesel generator output, load current and load voltage; collect diesel oil through the diesel generator The generator outputs power, and collects the load current and load voltage through the load terminal.
所述步骤2中，根据所述环境温度和太阳辐射度计算光伏发电设备输出功率PPV，根据风速计算风力发电机输出功率PWT，根据柴油发电机出力计算柴油发电机输出功率PDE，并根据负载电流和负载电压计算负载容量PL。In the step 2, the output power P PV of the photovoltaic power generation equipment is calculated according to the ambient temperature and the solar irradiance, the output power P WT of the wind power generator is calculated according to the wind speed, the output power P DE of the diesel generator is calculated according to the output of the diesel generator, and Calculate the load capacity PL from the load current and load voltage.
与现有技术相比，本发明的有益效果在于：Compared with prior art, the beneficial effect of the present invention is:
1.采用了分布式结构，主控制器和就地终端之间采用工业以太网进行连接，可以实现大量数据的快速传送；1. A distributed structure is adopted, and industrial Ethernet is used to connect the main controller and the local terminal, which can realize the rapid transmission of large amounts of data;
2.采用GPRS或CDMA无线通信方式与监控中心实现信息的交互，可以避免由于边远基站地处海岛、沙漠等地理环境限制而无法进行有线通信，或者由于长距离的通讯线连接可能导致的信号干扰等问题；2. Use GPRS or CDMA wireless communication to realize information interaction with the monitoring center, which can avoid wired communication due to remote base stations located in islands, deserts and other geographical environments, or signal interference that may be caused by long-distance communication line connections And other issues;
3.围绕蓄电池的有效充放电和正常运行而开展，既保障了边远通信基站的可靠供电，又延长了蓄电池的使用寿命；3. Developed around the effective charging and discharging and normal operation of the battery, which not only ensures the reliable power supply of remote communication base stations, but also prolongs the service life of the battery;
4.管理员可以通过手机短信或彩信的方式查看协调控制系统的实时运行状态。4. The administrator can view the real-time operation status of the coordination control system through SMS or MMS.
附图说明Description of drawings
图1是本实用新型实施例中风光互补发电协调控制系统结构示意图；Fig. 1 is a schematic structural diagram of a coordinated control system for wind-solar hybrid power generation in an embodiment of the utility model;
图2是本实用新型实施例中风光互补发电系统结构示意图；Fig. 2 is a schematic structural diagram of a wind-solar hybrid power generation system in an embodiment of the utility model;
图3是本实用新型实施例中风光互补发电协调控制方法流程图。Fig. 3 is a flowchart of a coordinated control method for wind-solar hybrid power generation in an embodiment of the utility model.
具体实施方式Detailed ways
下面结合附图对本发明作进一步详细说明。The present invention will be described in further detail below in conjunction with the accompanying drawings.
如图1，提供一种风光互补发电协调控制系统，所述风光互补发电协调控制系统包括系统主站和系统从站，所述系统主站和系统从站通过工业以太网进行通信连接。As shown in Fig. 1 , a coordinated control system for wind-solar hybrid power generation is provided. The wind-solar hybrid power generation coordinated control system includes a system master station and a system slave station, and the system master station and system slave stations are connected through industrial Ethernet for communication.
所述系统主站包括主控制器和液晶显示器，所述主控制器采用PC机或嵌入式PC。The main station of the system includes a main controller and a liquid crystal display, and the main controller adopts a PC or an embedded PC.
所述主控制器采用工业以太网网卡（Network Interface Card，NIC）与所述就地终端进行通信，并采用GPRS或CDMA与监控中心进行无线通信。The main controller uses an industrial Ethernet network card (Network Interface Card, NIC) to communicate with the local terminal, and uses GPRS or CDMA to communicate wirelessly with the monitoring center.
所述系统从站包括就地终端，所述就地终端包括光伏发电终端、风力发电终端、柴油发电终端、蓄电池终端、环境监测终端和负载终端；所述负载终端包括重要通信负载终端、次要通信负载终端和交流负载终端。The system slave station includes on-site terminals, and the on-site terminals include photovoltaic power generation terminals, wind power generation terminals, diesel power generation terminals, storage battery terminals, environmental monitoring terminals and load terminals; the load terminals include important communication load terminals, secondary Communication load terminal and AC load terminal.
所述重要通信负载终端包括收发信机、传输管理机、传输扩展设备和卫星设备；所述次要通信负载终端包括光端机、数据业务设备、天线和发射塔。The important communication load terminals include transceivers, transmission management machines, transmission expansion equipment and satellite equipment; the secondary communication load terminals include optical transceivers, data service equipment, antennas and transmission towers.
所述光伏发电终端、风力发电终端、柴油发电终端、蓄电池终端、环境监测终端和负载终端均采用工业以太网芯片和应用层CPU芯片，所述工业以太网芯片与所述工业以太网进行数据交换，所述应用层CPU芯片进行AD采样、数据计算与处理、开关量输入信号处理和控制继电器输出处理。The photovoltaic power generation terminal, wind power generation terminal, diesel power generation terminal, storage battery terminal, environmental monitoring terminal and load terminal all use industrial Ethernet chips and application layer CPU chips, and the industrial Ethernet chips exchange data with the industrial Ethernet , the application layer CPU chip performs AD sampling, data calculation and processing, digital input signal processing and control relay output processing.
太阳光照夏季强、冬季弱，而风力夏季小、冬季大；天气好时太阳光照强而风力小，天气不好时太阳光照弱而风力大；白天太阳光照强风力小，而晚上风力大太阳光照没有，所以可利用风能太阳能两者的变化趋势基本相反的自然特性，扬长避短，相互配合，发挥出可再生资源的最大效用，这就是风光互补技术。The sun is strong in summer and weak in winter, but the wind is small in summer and strong in winter; when the weather is good, the sun is strong and the wind is small; when the weather is bad, the sun is weak and the wind is strong; the sun is strong during the day and the wind is small, but the wind is strong at night. No, so we can use the natural characteristics of wind energy and solar energy, whose changing trends are basically opposite, to maximize their strengths and avoid their weaknesses, and cooperate with each other to maximize the effectiveness of renewable resources. This is the complementary technology of wind and solar.
一套独立运行的风光互补发电系统包括风光互补发电协调控制系统、光伏发电设备、风力发电机、柴油发电机和蓄电池。An independently operated wind-solar hybrid power generation system includes a wind-solar hybrid power generation coordinated control system, photovoltaic power generation equipment, wind power generators, diesel generators and batteries.
风光互补发电系统由能量产生、存储、消耗环节三部分组成。风力发电和太阳能发电部分属于能量产生环节，分别将具有不确定性的风能、太阳能转化为稳定的能源；为了最大限度地避免由于气候、环境等外部因素引起的能量供应与消耗之间的不平衡，采用在系统中接入蓄电池来承担能量的储存环节，从而实现能量供应和需求之间的调节和均衡；能量消耗环节是指各种用电负载，分为直流负载和交流负载两类。工作电压与直流母线电压匹配的直流负载可以直接接入系统，工作电压与直流母线电压不匹配的直流负载通过直流变换器后接入系统；交流负载连入电路时需要配备逆变器。另外，为了增强系统供电的不间断性和稳定性，可以考虑引入后备柴油发电机，后备柴油发电机的选配很大程度上还是根据当地的风力、日照资源条件确定的。风力发电机和柴油发电机发出的交流电，经AC/DC逆变器整流后变成直流电接入直流母线，光伏发电发出的直流电通过DC/DC逆变器转换为相应电压等级的直流电后也接入直流母线，在协调控制系统的控制下，直流母线通过DC/DC逆变器对蓄电池进行充电。协调控制系统的功能包括控制风力发电机、柴油发电机和太阳能光伏发电对蓄电池的充电管理；实现对蓄电池向负载的放电管理；光伏互补发电系统运行时的数据采集功能；以及与远方监控中心的通信功能。The wind-solar hybrid power generation system consists of three parts: energy generation, storage, and consumption. Wind power generation and solar power generation belong to the link of energy generation, which convert uncertain wind energy and solar energy into stable energy; in order to avoid the imbalance between energy supply and consumption caused by external factors such as climate and environment , using the battery connected to the system to undertake the energy storage link, so as to realize the adjustment and balance between energy supply and demand; the energy consumption link refers to various electrical loads, which are divided into two types: DC load and AC load. The DC load whose working voltage matches the DC bus voltage can be directly connected to the system, and the DC load whose working voltage does not match the DC bus voltage is connected to the system through a DC converter; when the AC load is connected to the circuit, an inverter is required. In addition, in order to enhance the uninterrupted and stable power supply of the system, the introduction of backup diesel generators can be considered. The selection of backup diesel generators is largely determined according to the local wind and sunshine resource conditions. The alternating current generated by the wind power generator and the diesel generator is rectified by the AC/DC inverter and then converted into direct current and connected to the DC bus. Under the control of the coordinated control system, the DC bus charges the battery through the DC/DC inverter. The functions of the coordinated control system include controlling the charging management of the storage battery by wind turbines, diesel generators and solar photovoltaic power generation; realizing the discharge management of the storage battery to the load; the data collection function during the operation of the photovoltaic complementary power generation system; and the communication with the remote monitoring center communication function.
如图3，风光互补发电系统作为边远通信基站的独立供电系统，需要提供不间断的电力能源，因此对于蓄电池的依赖很强，蓄电池是保证风光互补发电系统稳定和持续运行的关键部件。由于风光发电的随机性、波动性特点，如果不对蓄电池的充放电进行有效管理，可能导致蓄电池过充电或过放电等现象，这直接影响蓄电池的循环使用寿命，增加风光互补发电系统运行维护成本，降低系统运行可靠性。所以，保证蓄电池充放电过程的正常，即对蓄电池的充放电进行有效的控制，就显得尤为的关键；同时，蓄电池的初期投资在风光互补发电系统中也占很大的一部分，约15%~20%，而蓄电池由于自身特点和充放电特性，是整个系统中最易损坏的部分。基于这些原因，就使风光互补发电系统的协调控制策略要围绕蓄电池的有效充放电和正常运行而开展。As shown in Figure 3, the wind-solar hybrid power generation system, as an independent power supply system for remote communication base stations, needs to provide uninterrupted power energy, so it relies heavily on batteries, which are key components to ensure the stable and continuous operation of the wind-solar hybrid power generation system. Due to the randomness and volatility of wind and solar power generation, if the charge and discharge of the battery is not effectively managed, it may lead to overcharging or overdischarging of the battery, which directly affects the cycle life of the battery and increases the operation and maintenance costs of the wind and solar hybrid power generation system. Reduce system reliability. Therefore, it is particularly critical to ensure the normal charging and discharging process of the battery, that is, to effectively control the charging and discharging of the battery; at the same time, the initial investment of the battery also accounts for a large part of the wind and solar hybrid power generation system, about 15%~ 20%, and the battery is the most vulnerable part of the entire system due to its own characteristics and charging and discharging characteristics. For these reasons, the coordinated control strategy of the wind-solar hybrid power generation system should be carried out around the effective charging and discharging and normal operation of the battery.
蓄电池的荷电状态SOC=蓄电池剩余的安时容量/额定安时容量The state of charge of the battery SOC = the remaining ampere-hour capacity of the battery / rated ampere-hour capacity
SOCt是当前蓄电池的荷电状态，SOCt+1是下一时刻蓄电池的荷电状态，SOCmin是蓄电池的荷电状态下限，SOCmax是蓄电池的荷电状态上限，蓄电池必须时刻满足存储容量约束条件，即：SOC t is the current state of charge of the battery, SOC t+1 is the state of charge of the battery at the next moment, SOC min is the lower limit of the state of charge of the battery, SOC max is the upper limit of the state of charge of the battery, and the battery must always meet the storage capacity Constraints, namely:
SOCmin SOCt≤SOCmax SOC min SOC t ≤ SOC max
当风光功率满足负载后还有剩余功率时，对蓄电池充电，而当风光功率不足时，首先由蓄电池放电供给负载，这样，在满足负载需求的情况下利用储能装置将多余的电能存储起来，而在风速较低或光照强度较弱时再通过储能装置放电供给负载，从而可提高可再生能源利用效率，同时，由于每次决策之前都对蓄电池荷电状态进行检测，防止对蓄电池过充电或过放电，实现了对蓄电池的有效管理。When the wind power satisfies the load and there is remaining power, the battery is charged, and when the wind power is insufficient, the battery is discharged to supply the load first, so that the excess electric energy is stored by the energy storage device when the load demand is met. When the wind speed is low or the light intensity is weak, the energy storage device is used to discharge and supply the load, which can improve the utilization efficiency of renewable energy. At the same time, the state of charge of the battery is detected before each decision to prevent overcharging of the battery. Or over-discharge, to achieve effective management of the battery.
同时提供一种风光互补发电协调控制方法，所述方法包括以下步骤：At the same time, a coordinated control method for wind-solar hybrid power generation is provided, and the method includes the following steps:
步骤1：采集环境信息和动力信息：Step 1: Collect environmental information and power information:
步骤2：计算光伏发电设备输出功率PPV、风力发电机输出功率PWT、柴油发电机输出功率PDE和负载容量PL，并计算负载容量PL与电源总功率PS的差值Pnet，Pnet=PL-PS，其中：PS=PPV+PWT+PDE；Step 2: Calculate the output power P PV of the photovoltaic power generation equipment, the output power P WT of the wind turbine, the output power P DE of the diesel generator and the load capacity P L , and calculate the difference P net between the load capacity P L and the total power P S of the power supply , P net =P L -P S , where: P S =P PV +P WT +P DE ;
根据科学出版社于2008年出版、由赵争鸣，刘建政，孙晓瑛和袁立强等主编的《太阳能光伏发电及其应用》和科学出版社于2004年出版、由太阳光电协会[日]主编的《太阳能光伏发电系统的设计与施工》计算光伏发电设备输出功率PPV；According to "Solar Photovoltaic Power Generation and Its Application" published by Science Press in 2008 and edited by Zhao Zhengming, Liu Jianzheng, Sun Xiaoying and Yuan Liqiang, and "Solar Photovoltaic Power Generation and Its Application" published by Science Press in 2004 and edited by Solar Photovoltaic Association Design and Construction of Photovoltaic Power Generation System" Calculate the output power P PV of photovoltaic power generation equipment;
根据中国电力出版社于2003年出版、由王承煦和张源主编的《风力发电》计算风力发电机输出功率PWT。Calculate the wind power generator output power P WT according to "Wind Power Generation" published by China Electric Power Publishing House in 2003 and edited by Wang Chengxu and Zhang Yuan.
步骤3：判断Pnet是否大于0，若是则执行步骤4，若否则执行步骤6；Step 3: Determine whether P net is greater than 0, if so, execute step 4, otherwise execute step 6;
步骤4：判断当前蓄电池的荷电状态SOCt是否大于等于蓄电池的荷电状态下限SOCmin，若是则执行步骤5，若否则减少负载并对蓄电池充电后，执行步骤8；Step 4: Judging whether the current state of charge SOC t of the battery is greater than or equal to the lower limit SOC min of the battery state of charge, if so, perform step 5, otherwise, after reducing the load and charging the battery, perform step 8;
步骤5：判断蓄电池能否完全供给Pnet，若是则由蓄电池供给Pnet后执行步骤8，若否则减少负载终端后执行步骤8；Step 5: Determine whether the battery can fully supply P net , if so, perform step 8 after the battery supplies P net , otherwise, perform step 8 after reducing the load terminal;
步骤6：判断当前蓄电池的荷电状态SOCt是否小于等于蓄电池的荷电状态上限SOCmax，若是则执行步骤7，若否则增加负载或减少柴油发电机出力后执行步骤8；Step 6: Determine whether the current state of charge SOC t of the battery is less than or equal to the upper limit SOC max of the battery state of charge, if so, perform step 7, otherwise, increase the load or reduce the output of the diesel generator and then perform step 8;
步骤7：对蓄电池充电，并判断是否能完全吸纳|Pnet|，若是则|Pnet|全部用于对蓄电池充电后，执行步骤8；若否则先对蓄电池充电，再增加负载或减少柴油发电机出力后，执行步骤8；Step 7: Charge the battery, and judge whether |P net | can be fully absorbed, if yes, all of |P net | is used to charge the battery, then go to step 8; otherwise, charge the battery first, then increase the load or reduce diesel power generation After the engine works, go to step 8;
步骤8：计算下一时刻蓄电池的荷电状态SOCt+1。Step 8: Calculate the state of charge SOC t+1 of the battery at the next moment.
所述步骤1中，通过环境监测终端采集环境信息，所述环境信息包括环境温度、太阳辐射度和风速，所述动力信息包括柴油发电机出力、负载电流和负载电压；通过柴油发电机采集柴油发电机出力，并通过负载终端采集负载电流和负载电压。In the step 1, collect environmental information through the environmental monitoring terminal, the environmental information includes ambient temperature, solar radiation and wind speed, and the power information includes diesel generator output, load current and load voltage; collect diesel oil through the diesel generator The generator outputs power, and collects the load current and load voltage through the load terminal.
所述步骤2中，根据所述环境温度和太阳辐射度计算光伏发电设备输出功率PPV，根据风速计算风力发电机输出功率PWT，根据柴油发电机出力计算柴油发电机输出功率PDE，并根据负载电流和负载电压计算负载容量PL。In the step 2, the output power P PV of the photovoltaic power generation equipment is calculated according to the ambient temperature and the solar irradiance, the output power P WT of the wind power generator is calculated according to the wind speed, the output power P DE of the diesel generator is calculated according to the output of the diesel generator, and Calculate the load capacity PL from the load current and load voltage.
该方法围绕蓄电池的有效充放电和正常运行而开展，当风光功率满足负载后还有剩余功率时，对蓄电池充电，而当风光功率不足时，首先由蓄电池放电供给负载，这样，在满足负载需求的情况下利用储能装置将多余的电能存储起来，而在风速较低或光照强度较弱时再通过储能装置放电供给负载。This method is carried out around the effective charging and discharging and normal operation of the battery. When the wind power meets the load and there is remaining power, the battery is charged. When the wind power is insufficient, the battery is first discharged to supply the load. In this way, the load demand is met. When the wind speed is low or the light intensity is weak, the energy storage device is used to discharge and supply the load.
最后应当说明的是：以上实施例仅用以说明本发明的技术方案而非对其限制，尽管参照上述实施例对本发明进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本发明的具体实施方式进行修改或者等同替换，而未脱离本发明精神和范围的任何修改或者等同替换，其均应涵盖在本发明的权利要求范围当中。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.
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