CN105305637B - A kind of grid-connected warning system of distributed generation resource and its operation method - Google Patents
A kind of grid-connected warning system of distributed generation resource and its operation method Download PDFInfo
- Publication number
- CN105305637B CN105305637B CN201510816812.8A CN201510816812A CN105305637B CN 105305637 B CN105305637 B CN 105305637B CN 201510816812 A CN201510816812 A CN 201510816812A CN 105305637 B CN105305637 B CN 105305637B
- Authority
- CN
- China
- Prior art keywords
- module
- alarm
- voltage
- grid
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000004891 communication Methods 0.000 claims abstract description 44
- 230000008859 change Effects 0.000 claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 11
- 102100038591 Endothelial cell-selective adhesion molecule Human genes 0.000 claims description 9
- 101000882622 Homo sapiens Endothelial cell-selective adhesion molecule Proteins 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 abstract description 14
- 238000012423 maintenance Methods 0.000 abstract description 11
- 238000011017 operating method Methods 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 26
- 238000001514 detection method Methods 0.000 description 14
- 238000012544 monitoring process Methods 0.000 description 9
- 238000010248 power generation Methods 0.000 description 7
- 230000004044 response Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
本发明涉及一种分布式电源并网告警系统及其运行方法,包括光伏组件、逆变器、失压脱扣断路器、刀闸、并网电能表、告警装置、漏电保护断路器,逆变器、失压脱扣断路器、并网电能表、告警装置、漏电保护断路器依次连接,失压脱扣断路器通过刀闸连接并网电能表;告警装置包括主控MCU及与主控MCU连接的信息采集模块、电压异常告警模块、频率变化告警模块、显示模块、上行通信模块、存储模块及电源模块。本发明运行时,将漏电保护断路器连入电网侧,当电网侧失压或者频率变化超过一定范围时,该告警装置能够发送告警信息通知管理人员,去检查分布式电源并网系统设备运行情况,更大范围、程度上提高了电网、设备和运维管理人员的安全性。
The invention relates to a distributed power grid-connected alarm system and its operating method, including a photovoltaic module, an inverter, a voltage loss tripping circuit breaker, a knife switch, a grid-connected electric energy meter, an alarm device, an electric leakage protection circuit breaker, an inverter circuit breaker, grid-connected watt-hour meter, alarm device, and leakage protection circuit breaker are connected in sequence, and the voltage-loss tripping circuit breaker is connected to the grid-connected watt-hour meter through a knife switch; the alarm device includes the main control MCU and the main control MCU Connected information collection module, abnormal voltage alarm module, frequency change alarm module, display module, uplink communication module, storage module and power supply module. When the invention is in operation, the leakage protection circuit breaker is connected to the power grid side. When the power grid side loses voltage or the frequency changes beyond a certain range, the alarm device can send alarm information to notify the management personnel to check the operation status of the distributed power grid-connected system equipment , which improves the safety of power grids, equipment and operation and maintenance managers on a larger scale and to a greater extent.
Description
技术领域technical field
本发明涉及一种分布式电源并网告警系统及其运行方法,属于分布式电源并网检测技术领域。The invention relates to a distributed power grid-connected alarm system and an operating method thereof, belonging to the technical field of distributed power grid-connected detection.
背景技术Background technique
随着国家对新能源的推广和使用的普及程度越来越高,如何保障安全有序的管理发电客户成为供电公司面对的重要课题。As the country's promotion and use of new energy is becoming more and more popular, how to ensure safe and orderly management of power generation customers has become an important issue for power supply companies.
目前,研究最多的是分布式电源并网之后对电网运行方式的影响和孤岛检测方法的研究,但是,针对运行维护人员安全管理的细节方便考虑甚少。2015年分布式电源并网申请呈井喷式发展,由于安装条件的特殊性,绝大多数为乡镇户用分布式发电项目,地域跨越性大、分散性强、管理上易出现遗漏、混淆等情况,结合行业发展及各管理单位对发电用户实际的管理状况,难点在于无法第一时间通知到发电项目所在地的管理人员,从而在电网停电检修时增大反送电、误操作等安全事故的风险。At present, the most research is on the influence of distributed power generation on the grid operation mode and the research on the islanding detection method after grid connection, but the details of the safety management of operation and maintenance personnel are rarely considered. In 2015, applications for grid-connection of distributed power generation developed in a blowout manner. Due to the particularity of installation conditions, most of them were distributed power generation projects for households in towns and villages. The geographical spanning is large, the dispersion is strong, and management is prone to omissions and confusion. , combined with the development of the industry and the actual management status of power generation users by various management units, the difficulty is that it is impossible to notify the management personnel at the location of the power generation project in the first place, thus increasing the risk of safety accidents such as reverse power transmission and misoperation during power grid maintenance. .
中国专利文献CN102116816A公开了一种分布式电源并网运行监测装置,包括信号采集模块、信号处理模块以及管理控制模块;所述信号采集模块采集分布式电网和主电网的电压和电流;所述信号处理模块根据电压和电流计算电参量;所述管理控制模块接收、存储所述电参量,并根据所述电参量对分布式电网并网运行进行管理和控制。本发明测量并网接口处分布式电网和主电网的电压和电流,采用预处理和高速数字信号处理,精确计算出分布式电网和主电网的电参量,根据电参量对分布式电源并网运行进行监测、管理和控制,掌握了配电网实际的静态和动态行为,从而能够指导电网安全、经济运行,保证配电网的稳定性和安全性。但是该专利存在以下缺陷:(1)检测电流不能明显反应电网失电的电能质量变化情况,因为电网断电时,分布式电源依然可能正常向负载供电,这时电流变化很小,所以不能作为判断依据;(2)不具备低压穿越能力,频率响应能力。Chinese patent document CN102116816A discloses a distributed power grid-connected operation monitoring device, including a signal acquisition module, a signal processing module and a management control module; the signal acquisition module collects the voltage and current of the distributed power grid and the main power grid; the signal The processing module calculates electrical parameters according to the voltage and current; the management control module receives and stores the electrical parameters, and manages and controls the grid-connected operation of the distributed power grid according to the electrical parameters. The invention measures the voltage and current of the distributed grid and the main grid at the grid-connected interface, adopts preprocessing and high-speed digital signal processing, accurately calculates the electrical parameters of the distributed grid and the main grid, and performs grid-connected operation of the distributed power supply according to the electrical parameters Through monitoring, management and control, mastering the actual static and dynamic behavior of the distribution network can guide the safe and economical operation of the distribution network and ensure the stability and security of the distribution network. However, this patent has the following defects: (1) The detection current cannot obviously reflect the power quality change of the grid failure, because when the grid is powered off, the distributed power supply may still supply power to the load normally, and the current change is very small at this time, so it cannot be used as Judgment basis; (2) Does not have low-voltage ride-through capability and frequency response capability.
发明内容Contents of the invention
针对现有技术的不足,本发明提供了一种分布式电源并网告警系统;Aiming at the deficiencies of the prior art, the present invention provides a distributed power grid-connected alarm system;
本发明还提供了上述分布式电源并网告警系统的运行方法;The present invention also provides an operation method of the above-mentioned distributed power grid-connected alarm system;
本发明可实时监测所有已并网的分布式电源的运行情况,具有反孤岛检测和告警功能,检测精度高,检测盲区小,告警准确、及时,安全性高。在电网停电检修时可第一时间通知到项目所在地的管理人员,及时断开并网侧刀闸,保证了检修人员和电网的安全。The invention can monitor the running conditions of all grid-connected distributed power sources in real time, has the functions of anti-islanding detection and alarm, high detection precision, small detection blind area, accurate and timely alarm, and high safety. When the power grid is out of maintenance, the management personnel at the location of the project can be notified at the first time, and the grid-connected side knife switch is disconnected in time to ensure the safety of the maintenance personnel and the power grid.
术语解释Terminology Explanation
1、WDT,是英语Watchdog Timer的缩写字母。Watchdog Timer中文名看门狗。是一个定时器电路,一般有一个输入,叫喂狗,一个输出到MCU的RST端,MCU正常工作的时候,每隔一段时间输出一个信号到喂狗端,给WDT清零,如果超过规定的时间不喂狗,(一般在程序跑飞时),WDT定时超过,就会给出一个复位信号到MCU,使MCU复位,防止MCU死机,看门狗的作用就是防止程序发生死循环,或者说程序跑飞。1. WDT is the abbreviation of English Watchdog Timer. Watchdog Timer Chinese name Watchdog. It is a timer circuit, generally has one input, called feeding dog, and one output to the RST terminal of the MCU. When the MCU is working normally, it outputs a signal to the feeding dog terminal every once in a while, and clears WDT. If it exceeds the specified Time does not feed the dog, (generally when the program runs away), when the WDT time exceeds, a reset signal will be sent to the MCU to reset the MCU and prevent the MCU from crashing. The function of the watchdog is to prevent the program from infinitely looping, or The program runs away.
2、孤岛,即孤岛效应,是指在电网发生计划停电或者非计划停电的情况下,并入电网的发电装置不能检测到或根本没有相应检测手段,仍然向电网馈送电量。2. Islanding, that is, the islanding effect, means that in the event of a planned or unplanned power outage in the power grid, the power generation device connected to the power grid cannot be detected or has no corresponding detection means at all, and still feeds power to the power grid.
本发明的技术方案为:Technical scheme of the present invention is:
一种分布式电源并网告警系统,包括光伏组件、逆变器、失压脱扣断路器、刀闸、并网电能表、告警装置、漏电保护断路器,所述光伏组件、所述逆变器、所述失压脱扣断路器、所述并网电能表、所述告警装置、所述漏电保护断路器依次连接,所述失压脱扣断路器通过所述刀闸连接所述并网电能表;所述告警装置包括主控MCU及与所述主控MCU连接的信息采集模块、电压异常告警模块、频率变化告警模块、显示模块、上行通信模块、存储模块及电源模块。A distributed power grid-connected alarm system, including a photovoltaic module, an inverter, a voltage loss tripping circuit breaker, a knife switch, a grid-connected electric energy meter, an alarm device, and a leakage protection circuit breaker. The photovoltaic module, the inverter The voltage-loss tripping circuit breaker, the grid-connected electric energy meter, the alarm device, and the leakage protection circuit breaker are connected in sequence, and the voltage-loss tripping circuit breaker is connected to the grid-connected Electric energy meter; the alarm device includes a main control MCU and an information collection module connected to the main control MCU, a voltage abnormality alarm module, a frequency change alarm module, a display module, an uplink communication module, a storage module and a power supply module.
根据本发明优选的,所述信息采集模块用于实时获取电网侧电压值u及频率值f并实时发送至所述主控MCU,还将实时获取的电网侧电压值u及频率值f发送至显示模块显示;所述主控MCU实时判断:电压值u是否超出电压正常运行阈值U,频率值f是否超出频率正常运行阈值F,当判断出电压值U超出电压正常运行阈值U时,发送告警指令至所述电压异常告警模块;当频率值f超出频率正常运行阈值F时,发送告警指令至所述频率变化告警模块;所述电压异常告警模块用于:接收到告警指令后,通过所述上行通信模块发送警示信息至管理人员;所述频率变化告警模块用于:接收到告警指令后,通过所述上行通信模块发送警示信息至管理人员;所述存储模块用于:存储信息采集模块实时获取的电网侧电压值u及频率值f,存储所述告警装置的运行程序及所有的告警记录,所述F的取值范围为:49.5-50.2Hz,所述U的取值范围为:85%UN-110%UN,UN是指额定电压。Preferably, according to the present invention, the information collection module is used to obtain the voltage value u and the frequency value f of the power grid side in real time and send them to the main control MCU in real time, and also send the voltage value u and the frequency value f of the power grid side obtained in real time to The display module displays; the main control MCU judges in real time: whether the voltage value u exceeds the voltage normal operation threshold U, whether the frequency value f exceeds the frequency normal operation threshold F, and when it is judged that the voltage value U exceeds the voltage normal operation threshold U, an alarm is sent Instructions to the abnormal voltage alarm module; when the frequency value f exceeds the frequency normal operation threshold F, send an alarm instruction to the frequency change alarm module; the abnormal voltage alarm module is used to: after receiving the alarm instruction, through the The uplink communication module sends warning information to the management personnel; the frequency change alarm module is used for: after receiving the warning instruction, sends the warning information to the management personnel through the uplink communication module; the storage module is used for: storing the information collection module in real time The acquired grid-side voltage value u and frequency value f store the operation program and all alarm records of the alarm device. The value range of F is: 49.5-50.2 Hz, and the value range of U is: 85 %U N -110% U N , U N refers to the rated voltage.
本发明运行时,将所述漏电保护断路器连入电网侧,当电网侧失压或者频率变化超过一定范围时,该告警装置能够发送告警信息通知管理人员,管理人员根据告警信息,去检查分布式电源并网系统设备运行情况,更大范围、程度上提高了电网、设备和运维管理人员的安全性。而且,当逆变器具有防孤岛监测盲区或者逆变器防孤岛功能失效,也就是在某个范围内它不能动作,不能实现防孤岛保护功能,该告警装置能够弥补该缺陷实现二级防孤岛监测功能。When the present invention is in operation, the leakage protection circuit breaker is connected to the grid side. When the grid side loses voltage or the frequency changes beyond a certain range, the alarm device can send alarm information to notify the management personnel, and the management personnel check the distribution according to the alarm information. The equipment operation status of the grid-connected power supply system improves the safety of the power grid, equipment and operation and maintenance management personnel in a wider range and to a greater extent. Moreover, when the inverter has an anti-islanding monitoring blind area or the inverter’s anti-islanding function fails, that is, it cannot operate within a certain range and cannot realize the anti-islanding protection function, the alarm device can make up for this defect and realize the second-level anti-islanding function monitoring function.
根据本发明优选的,所述信息采集模块包括A/D转换器;所述显示模块为LED点阵液晶显示器;所述上行通信模块为GPRS/CDMA无线模块、以太网模块或光纤(EPON)模块;所述存储模块为NOR FLASH;所述电源模块为AC/DC开关电源,所述AC/DC开关电源连接电网侧。Preferably according to the present invention, the information collection module includes an A/D converter; the display module is an LED dot-matrix liquid crystal display; the uplink communication module is a GPRS/CDMA wireless module, an Ethernet module or an optical fiber (EPON) module ; The storage module is NOR FLASH; the power module is an AC/DC switching power supply, and the AC/DC switching power supply is connected to the grid side.
通过A/D转换器将采集到的电网侧电压值u及频率值f等数字信息号转换为模拟信号,将模拟信号发送至主控MCU。The collected digital information such as voltage value u and frequency value f on the grid side is converted into an analog signal through an A/D converter, and the analog signal is sent to the main control MCU.
所述上行通信模块采用模块化设计,具有模块类型识别位,可自动识别不同类型的模块,支持热插拔功能;The uplink communication module adopts a modular design, has a module type identification bit, can automatically identify different types of modules, and supports hot-swappable functions;
AC/DC开关电源将交流市电转换为低压直流电,为所述告警装置提供电源。宽电压范围输入,适应57.7/220/380V三种电压规格。通过隔离的电压互感器采样交流电压,实现交流电压监测功能。The AC/DC switching power supply converts the AC mains power into a low-voltage direct current to provide power for the warning device. Wide voltage range input, suitable for three voltage specifications of 57.7/220/380V. The AC voltage is sampled through the isolated voltage transformer to realize the AC voltage monitoring function.
根据本发明优选的,所述告警装置还包括:时钟单元电路、电源管理电路、WDT电路、温度检测电路和ESAM加密电路,所述时钟单元电路、所述电源管理电路、所述WDT电路、所述温度检测电路和所述ESAM加密电路分别连接所述主控MCU。Preferably according to the present invention, the alarm device further includes: a clock unit circuit, a power management circuit, a WDT circuit, a temperature detection circuit and an ESAM encryption circuit, the clock unit circuit, the power management circuit, the WDT circuit, the The temperature detection circuit and the ESAM encryption circuit are respectively connected to the main control MCU.
时钟单元电路为告警装置提供运行需要的时钟时间,采用自动温补,提供锂电池维持停电时时钟的正常运行,电池电压欠压进行告警;电源管理电路提供主控MCU运行需要的各种直流电压,支持系统停电上报;WDT电路确保主控MCU的正常上电初始化,监控告警装置的运行并监测告警装置电压的异常状况;温度检测电路检测告警装置的环境温度,为计量采样的精度补偿提供温度参数,保证告警装置在-40~+75℃的范围内的计量精度;ESAM加密电路实现通讯报文的加密功能。The clock unit circuit provides the clock time required for the operation of the alarm device, adopts automatic temperature compensation, provides a lithium battery to maintain the normal operation of the clock during power failure, and alarms when the battery voltage is undervoltage; the power management circuit provides various DC voltages required for the operation of the main control MCU , support system power failure reporting; WDT circuit ensures the normal power-on initialization of the main control MCU, monitors the operation of the alarm device and monitors the abnormal condition of the voltage of the alarm device; the temperature detection circuit detects the ambient temperature of the alarm device, and provides temperature for the accuracy compensation of metering and sampling parameters to ensure the measurement accuracy of the alarm device in the range of -40 to +75°C; the ESAM encryption circuit realizes the encryption function of communication messages.
根据本发明优选的,所述主控MCU连接红外接口。Preferably, according to the present invention, the main control MCU is connected to an infrared interface.
此处设计的优势在于,具有红外通信功能。红外通信电路为调制远红外,实现与维护掌上电脑的通信功能。The advantage of the design here is that it has infrared communication function. The infrared communication circuit is for modulating far infrared to realize and maintain the communication function of the handheld computer.
根据本发明优选的,所述主控MCU连接通信接口单元,所述通信接口单元包括RS485通信电路。Preferably, according to the present invention, the main control MCU is connected to a communication interface unit, and the communication interface unit includes an RS485 communication circuit.
此处设计的优势在于:通信接口单元提供本地通信通道,包括RS485通信电路,遥信电路等。RS485通信电路选用工业级485芯片(可抗人体模式±15KV静电),三路485电路与主系统电路均采用光耦隔离的通讯方式,具有过流、过压保护功能。终端提供1路遥信输入,采用光耦隔离的方式实现与MCU的信号传输,信号接入处采用限流电阻和TVS分别实现过流、过压保护。The advantage of the design here is that the communication interface unit provides local communication channels, including RS485 communication circuits, remote signaling circuits, etc. The RS485 communication circuit adopts industrial-grade 485 chip (can resist human body model ±15KV static electricity), and the three-way 485 circuit and the main system circuit all adopt optocoupler isolation communication mode, with over-current and over-voltage protection functions. The terminal provides 1 channel of remote signal input, which uses optocoupler isolation to realize signal transmission with the MCU, and uses current-limiting resistors and TVS at the signal access to realize over-current and over-voltage protection respectively.
上述分布式电源并网告警系统的运行方法,具体步骤包括:The specific steps of the operation method of the above-mentioned distributed power grid-connected alarm system include:
(1)所述信息采集模块实时获取电网侧电压值u及频率值f并实时发送至所述主控MCU,与此同时,将实时获取的电网侧电压值u及频率值f发送至显示模块显示;(1) The information acquisition module acquires the grid side voltage value u and frequency value f in real time and sends them to the main control MCU in real time, and at the same time, sends the grid side voltage value u and frequency value f acquired in real time to the display module show;
(2)所述主控MCU实时判断电压值u是否超出电压正常运行阈值U,所述U的取值范围为:85%UN-110%UN,当判断出电压值U超出电压正常运行阈值U时,发送告警指令至所述电压异常告警模块,否则,返回步骤(1);与此同时,所述主控MCU实时判断频率值f是否超出频率正常运行阈值F,所述F的取值范围为:49.5-50.2Hz,当频率值f超出频率正常运行阈值F时,发送告警指令至所述频率变化告警模块,否则,返回步骤(1);(2) The main control MCU judges in real time whether the voltage value u exceeds the voltage normal operation threshold U, and the value range of the U is: 85% U N -110% U N , when it is judged that the voltage value U exceeds the voltage normal operation When the threshold U, send an alarm command to the abnormal voltage alarm module, otherwise, return to step (1); at the same time, the main control MCU judges in real time whether the frequency value f exceeds the frequency normal operation threshold F, and the acquisition of the F The value range is: 49.5-50.2Hz. When the frequency value f exceeds the frequency normal operation threshold F, an alarm command is sent to the frequency change alarm module, otherwise, return to step (1);
(3)当所述电压异常告警模块接收到告警指令时,通过所述上行通信模块发送警示信息至管理人员;当所述频率变化告警模块接收到告警指令时,通过所述上行通信模块发送警示信息至管理人员。(3) When the abnormal voltage alarm module receives an alarm instruction, it sends an alarm message to the management personnel through the uplink communication module; when the frequency change alarm module receives an alarm instruction, it sends an alarm through the uplink communication module information to management.
本发明的有益效果为:The beneficial effects of the present invention are:
1、本发明运行时,将所述漏电保护断路器连入电网侧,当电网侧失压或者频率变化超过一定范围时,该告警装置能够发送告警信息通知管理人员,管理人员根据告警信息,去检查分布式电源并网系统设备运行情况,更大范围、程度上提高了电网、设备和运维管理人员的安全性。1. When the present invention is running, the leakage protection circuit breaker is connected to the power grid side. When the power grid side loses voltage or the frequency changes beyond a certain range, the alarm device can send alarm information to notify the management personnel. Check the operation status of the distributed power grid-connected system equipment, which improves the safety of the grid, equipment and operation and maintenance management personnel in a wider range and to a greater extent.
2、逆变器具有防孤岛监测盲区或者逆变器防孤岛功能失效,也就是在某个范围内它不能动作也就不能实现防孤岛保护功能,该告警装置能够弥补该缺陷实现二级防孤岛监测功能。2. The inverter has an anti-islanding monitoring blind area or the inverter’s anti-islanding function fails, that is, it cannot operate within a certain range and cannot realize the anti-islanding protection function. The alarm device can make up for this defect and realize the second-level anti-islanding function monitoring function.
附图说明Description of drawings
图1为本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
图2为本发明所述告警装置的结构框图。Fig. 2 is a structural block diagram of the alarm device of the present invention.
图3为实施例2所述告警装置的结构框图。Fig. 3 is a structural block diagram of the alarm device described in Embodiment 2.
图4为本发明运行方法流程图。Fig. 4 is a flowchart of the operating method of the present invention.
图1-4中,1、光伏组件,2、逆变器,3、失压脱扣断路器,4、刀闸,5、并网电能表,6、告警装置,7、漏电保护断路器,8、主控MCU,9、信息采集模块,10、电压异常告警模块,11、频率变化告警模块,12、显示模块,13、上行通信模块,14、存储模块,15、电源模块,16、时钟单元电路,17、电源管理电路,18、WDT电路,19、温度检测电路,20、ESAM加密电路。In Figure 1-4, 1. Photovoltaic module, 2. Inverter, 3. Loss of voltage trip circuit breaker, 4. Knife switch, 5. Grid-connected energy meter, 6. Alarm device, 7. Leakage protection circuit breaker, 8. Main control MCU, 9. Information acquisition module, 10. Voltage abnormality alarm module, 11. Frequency change alarm module, 12. Display module, 13. Uplink communication module, 14. Storage module, 15. Power supply module, 16. Clock Unit circuit, 17, power management circuit, 18, WDT circuit, 19, temperature detection circuit, 20, ESAM encryption circuit.
具体实施方式Detailed ways
下面结合说明书附图和实施例对本发明作进一步限定,但不限于此。The present invention will be further limited below in conjunction with the accompanying drawings and embodiments, but not limited thereto.
实施例1Example 1
一种分布式电源并网告警系统,包括光伏组件1、逆变器2、失压脱扣断路器3、刀闸4、并网电能表5、告警装置6、漏电保护断路器7,所述光伏组件1、所述逆变器2、所述失压脱扣断路器3、所述并网电能表5、所述告警装置6、所述漏电保护断路器7依次连接,所述失压脱扣断路器3通过所述刀闸4连接所述并网电能表5;所述告警装置6包括主控MCU8及与所述主控MCU8连接的信息采集模块9、电压异常告警模块10、频率变化告警模块11、显示模块12、上行通信模块13、存储模块14及电源模块15。如图1所示。A distributed power grid-connected alarm system, including a photovoltaic module 1, an inverter 2, a voltage loss trip circuit breaker 3, a knife switch 4, a grid-connected electric energy meter 5, an alarm device 6, and a leakage protection circuit breaker 7, the The photovoltaic module 1, the inverter 2, the voltage-loss trip circuit breaker 3, the grid-connected electric energy meter 5, the alarm device 6, and the leakage protection circuit breaker 7 are connected in sequence, and the voltage-loss trip The circuit breaker 3 is connected to the grid-connected electric energy meter 5 through the knife switch 4; the alarm device 6 includes a main control MCU 8 and an information collection module 9 connected to the main control MCU 8, an abnormal voltage alarm module 10, a frequency change An alarm module 11 , a display module 12 , an uplink communication module 13 , a storage module 14 and a power supply module 15 . As shown in Figure 1.
失压脱扣断路器3用于:当电网停电或者由于某种原因电网电压降低过多(欠压)时,能使分布式电源从电网切除,起到欠压和零压保护的作用,当电网电压恢复时,失压脱扣断路器3也处于断开状态,必须人工操作才能合上刀闸4,保证人身安全和设备安全。The under-voltage tripping circuit breaker 3 is used for: when the grid is powered off or the grid voltage drops too much (undervoltage) for some reason, the distributed power supply can be cut off from the grid to play the role of undervoltage and zero voltage protection. When the power grid voltage recovers, the undervoltage tripping circuit breaker 3 is also in the disconnected state, and the knife switch 4 must be closed by manual operation to ensure personal safety and equipment safety.
在失压脱扣断路器3后加刀闸4的作用是根据安全规程要求在设备检修时,在检修设备与带电设备之间形成明显断开点,保证检修施工人员的人身安全。The function of adding a knife switch 4 behind the voltage-loss tripping circuit breaker 3 is to form an obvious disconnection point between the maintenance equipment and the live equipment when the equipment is overhauled according to the safety regulations, so as to ensure the personal safety of the overhaul construction personnel.
漏电保护断路器7安装在电网侧,当发生漏电和触电时,且达到保护所限定的动作电流时,在限定的时间内动作自动断开电源进行保护。The leakage protection circuit breaker 7 is installed on the side of the power grid. When leakage or electric shock occurs, and when the operating current limited by protection is reached, it will automatically cut off the power supply within a limited time for protection.
所述主控MCU8同时完成采样与计算,存储与通信,能够支持在线维护,使用的是国网13标准协议----符合国网对终端的采集规约。The main control MCU8 completes sampling and calculation, storage and communication at the same time, can support online maintenance, and uses the State Grid 13 standard protocol-conforming to the State Grid's collection regulations for terminals.
(1)基于ARM 32-bit Cortex-M3处理器,主频最高120MHz,高速运行时可达到150DMIPS的处理能力(1) Based on ARM 32-bit Cortex-M3 processor, the main frequency is up to 120MHz, and the processing capacity can reach 150DMIPS when running at high speed
(2)处理器内嵌512KB Flash,128+4KByte SRAM。(2) The processor is embedded with 512KB Flash and 128+4KByte SRAM.
(3)更低的动态功耗,188uA/MHz:从片上闪存以120MHz全速运行,功耗仅为22.5mA。(3) Lower dynamic power consumption, 188uA/MHz: running at full speed of 120MHz from the on-chip flash memory, the power consumption is only 22.5mA.
(4)FSMC接口,灵活的高速外部存储器接口,用于扩展片外存储器和外设(4) FSMC interface, flexible high-speed external memory interface, used to expand off-chip memory and peripherals
(5)优秀的实时性能,实时闪存加速度器。自适应实时闪存加速度器使得STM32F2可以在片内闪存上以120MHz的高速零等待地执行代码,从而极致地发挥了Cortex-M3的性能。(5) Excellent real-time performance, real-time flash accelerator. The adaptive real-time flash accelerator enables the STM32F2 to execute code at a high speed of 120MHz on the on-chip flash memory without waiting, thus maximizing the performance of the Cortex-M3.
(6)更多灵活创新的高性能外设,支持高速模式的USB OTG,视频传感器接口。(6) More flexible and innovative high-performance peripherals, supporting USB OTG in high-speed mode, and video sensor interface.
(7)灵活的静态存储器接口,速率高达60MHz。(7) Flexible static memory interface with a rate up to 60MHz.
(8)2个32位的定时器,带日历功能的多功能RTC32位定时器。(8) Two 32-bit timers, a multi-function RTC32-bit timer with calendar function.
(9)更高速度的通信接口,3个12位ADC模块,采样率高达2M/秒。(9) Higher speed communication interface, three 12-bit ADC modules, sampling rate up to 2M/s.
(10)翻转速率高达60MHz的82个GPIO。(10) 82 GPIOs with toggle rate up to 60MHz.
所述信息采集模块9用于实时获取电网侧电压值u及频率值f并实时发送至所述主控MCU8,还将实时获取的电网侧电压值u及频率值f发送至显示模块12显示;所述主控MCU8实时判断电压值u是否超出电压正常运行阈值U,频率值f是否超出频率正常运行阈值F,当判断出电压值U超出电压正常运行阈值U时,发送告警指令至所述电压异常告警模块10;当频率值f超出频率正常运行阈值F时,发送告警指令至所述频率变化告警模块11;所述电压异常告警模块10用于:接收到告警指令后,通过所述上行通信模块13发送警示信息至管理人员;所述频率变化告警模块11用于:接收到告警指令后,通过所述上行通信模块13发送警示信息至管理人员;所述存储模块14用于:存储信息采集模块9实时获取的电网侧电压值u及频率值f,存储所述告警装置6的运行程序及所有的告警记录,所述F的取值范围为:49.5-50.2Hz,所述U的取值范围为:85%UN-110%UN,UN是指额定电压。The information acquisition module 9 is used to acquire the grid side voltage value u and frequency value f in real time and send them to the main control MCU 8 in real time, and also send the grid side voltage value u and frequency value f acquired in real time to the display module 12 for display; The main control MCU8 judges in real time whether the voltage value u exceeds the voltage normal operation threshold U, whether the frequency value f exceeds the frequency normal operation threshold F, and when it is judged that the voltage value U exceeds the voltage normal operation threshold U, an alarm command is sent to the voltage Abnormal alarm module 10; when the frequency value f exceeds the frequency normal operation threshold F, send an alarm command to the frequency change alarm module 11; the voltage abnormal alarm module 10 is used to: after receiving the alarm command, through the uplink communication The module 13 sends warning information to the management personnel; the frequency change warning module 11 is used for: after receiving the warning instruction, sends the warning information to the management personnel through the uplink communication module 13; the storage module 14 is used for: storing information collection Module 9 acquires the grid side voltage value u and frequency value f in real time, stores the operation program of the alarm device 6 and all alarm records, the value range of F is: 49.5-50.2Hz, and the value of U The range is: 85% U N -110% U N , U N refers to the rated voltage.
本发明运行时,将所述漏电保护断路器7连入电网侧,当电网侧失压或者频率变化超过一定范围时,该告警装置6能够发送告警信息通知管理人员,管理人员根据告警信息,去检查分布式电源并网系统设备运行情况,更大范围、程度上提高了电网、设备和运维管理人员的安全性。而且,当逆变器具有防孤岛监测盲区或者逆变器防孤岛功能失效,也就是在某个范围内它不能动作,不能实现防孤岛保护功能,该告警装置6能够弥补该缺陷实现二级防孤岛监测功能。When the present invention is in operation, the leakage protection circuit breaker 7 is connected to the power grid side. When the power grid side loses voltage or the frequency changes beyond a certain range, the alarm device 6 can send alarm information to notify the management personnel, and the management personnel will go to the power grid according to the alarm information. Check the operation status of the distributed power grid-connected system equipment, which improves the safety of the grid, equipment and operation and maintenance management personnel in a wider range and to a greater extent. Moreover, when the inverter has an anti-islanding monitoring blind area or the inverter’s anti-islanding function fails, that is, it cannot operate within a certain range and cannot realize the anti-islanding protection function, the alarm device 6 can make up for this defect and realize the secondary anti-islanding function. Island monitoring function.
所述信息采集模块9包括A/D转换器;所述显示模块12为LED点阵液晶显示器;所述上行通信模块13为GPRS/CDMA无线模块、以太网模块或光纤(EPON)模块;所述存储模块14为NOR FLASH;所述电源模块15为AC/DC开关电源,所述AC/DC开关电源连接电网侧。Described information collecting module 9 comprises A/D converter; Described display module 12 is LED dot-matrix liquid crystal display; Described uplink communication module 13 is GPRS/CDMA wireless module, Ethernet module or optical fiber (EPON) module; Described The storage module 14 is NOR FLASH; the power module 15 is an AC/DC switching power supply, and the AC/DC switching power supply is connected to the grid side.
通过A/D转换器将采集到的电网侧电压值u及频率值f等数字信息号转换为模拟信号,将模拟信号发送至主控MCU8。The collected digital information such as voltage value u and frequency value f on the grid side is converted into an analog signal through an A/D converter, and the analog signal is sent to the main control MCU 8 .
显示模块12可以实现告警装置6的工作状态指示,工作状态指示包括:运行灯、告警灯、在线灯、信号强度指示灯、LINK灯、DATA灯、远程灯和本地灯等8个指示灯,分别指示告警装置6的当前运行状态、告警事件的发生与记录、告警装置6的上行通讯通道的在线状态、当前上行通讯通道的信号强度、以太网的链接状态,以太网的数据交互,远程通信模块的通信状态和本地通信接口的通信状态。The display module 12 can realize the working state indication of the warning device 6, and the working state indication includes: running light, warning light, online light, signal strength light, LINK light, DATA light, remote light and local light, etc. 8 indicator lights, respectively Indicate the current operating status of the alarm device 6, the occurrence and recording of alarm events, the online status of the uplink communication channel of the alarm device 6, the signal strength of the current uplink communication channel, the link status of the Ethernet, the data interaction of the Ethernet, and the remote communication module The communication status of and the communication status of the local communication interface.
显示模块12能显示电网侧电压(1V的精度)与电网侧频率(0.2Hz精度),平时以每3秒轮显一次,在出现异常时每秒轮显一次,在外接电表时,可以对电表抄读诸项数据(3期)。The display module 12 can display the grid-side voltage (1V accuracy) and grid-side frequency (0.2Hz accuracy), which are displayed in turn every 3 seconds at ordinary times, and once in a second when an abnormality occurs. Copy and read various data (3 issues).
所述上行通信模块13采用模块化设计,具有模块类型识别位,可自动识别不同类型的模块,支持热插拔功能;The uplink communication module 13 adopts a modular design, has a module type identification bit, can automatically identify different types of modules, and supports hot-swappable functions;
AC/DC开关电源将交流市电转换为低压直流电,为所述告警装置6提供电源。宽电压范围输入,适应57.7/220/380V三种电压规格。通过隔离的电压互感器采样交流电压,实现交流电压监测功能。The AC/DC switching power supply converts AC mains power into low-voltage direct current to provide power for the warning device 6 . Wide voltage range input, suitable for three voltage specifications of 57.7/220/380V. The AC voltage is sampled through the isolated voltage transformer to realize the AC voltage monitoring function.
本实施例所述告警系统采用工业级Cortex-M3系列控制器和嵌入式实时操作系统,同时完成采样与计算,存储与通信,能够支持在线维护,使用的是国网13标准协议——符合国网对终端的采集规约。具有电磁兼容性能优良、可靠性高、体积轻巧、安装方便等特点。The alarm system described in this embodiment adopts industrial-grade Cortex-M3 series controllers and embedded real-time operating systems to simultaneously complete sampling and calculation, storage and communication, and can support online maintenance. Network-to-terminal collection protocol. It has the characteristics of excellent electromagnetic compatibility, high reliability, light size and convenient installation.
本实施例所述告警系统应用于TLY2230型线路。The alarm system described in this embodiment is applied to a TLY2230 line.
实施例2Example 2
根据实施例1所述的一种分布式电源并网告警系统,其区别在于,所述告警装置还包括:时钟单元电路16、电源管理电路17、WDT电路18、温度检测电路19和ESAM加密电路20,所述时钟单元电路16、所述电源管理电路17、所述WDT电路18、所述温度检测电路19和所述ESAM加密电路20分别连接所述主控MCU8。According to a distributed power grid-connected alarm system described in Embodiment 1, the difference is that the alarm device also includes: a clock unit circuit 16, a power management circuit 17, a WDT circuit 18, a temperature detection circuit 19 and an ESAM encryption circuit 20 , the clock unit circuit 16 , the power management circuit 17 , the WDT circuit 18 , the temperature detection circuit 19 and the ESAM encryption circuit 20 are respectively connected to the main control MCU 8 .
时钟单元电路16为告警装置6提供运行需要的时钟时间,采用自动温补,提供锂电池维持停电时时钟的正常运行,电池电压欠压进行告警;电源管理电路17提供主控MCU8运行需要的各种直流电压,支持系统停电上报;WDT电路18确保主控MCU8的正常上电初始化,监控告警装置6的运行并监测告警装置6电压的异常状况;温度检测电路19检测告警装置6的环境温度,为计量采样的精度补偿提供温度参数,保证告警装置6在-40~+75℃的范围内的计量精度;ESAM加密电路20实现通讯报文的加密功能。The clock unit circuit 16 provides the clock time required for the operation of the alarm device 6, adopts automatic temperature compensation, provides lithium batteries to maintain the normal operation of the clock during power outages, and alarms when the battery voltage is undervoltage; the power management circuit 17 provides various functions required by the main control MCU8 operation. A DC voltage to support system power outage reporting; WDT circuit 18 ensures the normal power-on initialization of the main control MCU8, monitors the operation of the alarm device 6 and monitors the abnormal condition of the voltage of the alarm device 6; the temperature detection circuit 19 detects the ambient temperature of the alarm device 6, Provide temperature parameters for the accuracy compensation of metering sampling, and ensure the metering accuracy of the alarm device 6 within the range of -40°C to +75°C; the ESAM encryption circuit 20 realizes the encryption function of communication messages.
实施例3Example 3
实施例2所述的一种分布式电源并网告警系统的运行方法,具体步骤包括:The operating method of a distributed power grid-connected alarm system described in Embodiment 2, the specific steps include:
(1)所述信息采集模块9实时获取电网侧电压值u及频率值f并实时发送至所述主控MCU8,与此同时,将实时获取的电网侧电压值u及频率值f发送至显示模块12显示;(1) The information acquisition module 9 acquires the grid side voltage value u and the frequency value f in real time and sends them to the main control MCU 8 in real time, and at the same time, sends the grid side voltage value u and the frequency value f acquired in real time to the display Module 12 shows;
(2)所述主控MCU8实时判断电压值u是否超出电压正常运行阈值U,当判断出电压值U超出电压正常运行阈值U时,发送告警指令至所述电压异常告警模块10,电网侧电压取值范围及对应的电压异常告警模块10响应时间如表1所示,否则,返回步骤(1);与此同时,所述主控MCU8实时判断频率值f是否超出频率正常运行阈值F,电网侧频率取值范围及对应的频率变化告警装置11响应时间如表2所示,当频率值f超出频率正常运行阈值F时,发送告警指令至所述频率变化告警模块11,否则,返回步骤(1);(2) The main control MCU8 judges in real time whether the voltage value u exceeds the voltage normal operation threshold U, and when it is judged that the voltage value U exceeds the voltage normal operation threshold U, an alarm command is sent to the abnormal voltage alarm module 10, and the grid side voltage Value range and corresponding abnormal voltage alarm module 10 response time are as shown in table 1, otherwise, return step (1); Meanwhile, described master control MCU8 judges whether frequency value f exceeds frequency normal operation threshold value F in real time, power grid The value range of the side frequency and the response time of the corresponding frequency change alarm device 11 are as shown in Table 2. When the frequency value f exceeds the frequency normal operation threshold F, an alarm command is sent to the frequency change alarm module 11, otherwise, return to step ( 1);
表1Table 1
表2Table 2
(3)当所述电压异常告警模块10接收到告警指令时,通过所述上行通信模块13发送警示信息至管理人员;当所述频率变化告警模块11接收到告警指令时,通过所述上行通信模块13发送警示信息至管理人员。如图4所示。(3) When the abnormal voltage alarm module 10 receives an alarm instruction, it sends an alarm message to the management personnel through the uplink communication module 13; Module 13 sends warning information to management personnel. As shown in Figure 4.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510816812.8A CN105305637B (en) | 2015-11-20 | 2015-11-20 | A kind of grid-connected warning system of distributed generation resource and its operation method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510816812.8A CN105305637B (en) | 2015-11-20 | 2015-11-20 | A kind of grid-connected warning system of distributed generation resource and its operation method |
Publications (2)
Publication Number | Publication Date |
---|---|
CN105305637A CN105305637A (en) | 2016-02-03 |
CN105305637B true CN105305637B (en) | 2018-08-21 |
Family
ID=55202543
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201510816812.8A Active CN105305637B (en) | 2015-11-20 | 2015-11-20 | A kind of grid-connected warning system of distributed generation resource and its operation method |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN105305637B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105529741B (en) * | 2016-02-16 | 2018-02-23 | 国网山东省电力公司淄博供电公司 | A kind of distributed power source and its micro-capacitance sensor Intelligent Decision-making Method |
CN105515206B (en) * | 2016-02-16 | 2018-02-23 | 国网山东省电力公司淄博供电公司 | A kind of distributed power source and its micro-capacitance sensor intelligent early-warning method |
CN108802567B (en) * | 2018-06-01 | 2021-08-10 | 国网浙江省电力有限公司宁波供电公司 | Island monitoring method for new energy power supply |
CN113936437A (en) * | 2021-09-30 | 2022-01-14 | 国网山东省电力公司淄博供电公司 | Anti-islanding automatic alarm device |
CN114912779B (en) * | 2022-04-29 | 2024-08-23 | 东北大学 | Energy management device and method for distributed energy information system |
CN115085915B (en) * | 2022-06-14 | 2025-05-27 | 国网山东省电力公司电力科学研究院 | A network source demarcation switch and its communication method, and computer equipment |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103199559B (en) * | 2013-02-25 | 2014-07-16 | 孟绍良 | Intelligent center control type solar energy family roof grid-connected power generation system and operating method thereof |
CN103730914B (en) * | 2014-01-20 | 2016-02-03 | 江苏省电力公司常州供电公司 | The anti-islanding device differentiated based on electric parameters and method of work thereof |
CN104242340B (en) * | 2014-09-10 | 2016-07-27 | 南京磐能电力科技股份有限公司 | The unplanned grid-connected stable control method turned when islet operation pattern switches of micro-capacitance sensor |
-
2015
- 2015-11-20 CN CN201510816812.8A patent/CN105305637B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN105305637A (en) | 2016-02-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105305637B (en) | A kind of grid-connected warning system of distributed generation resource and its operation method | |
CN106941255A (en) | Based on the distributed maintenance free intelligent d. c power-supply system of cell and its control method | |
CN207352393U (en) | A kind of fault detector | |
CN103675671B (en) | A high-voltage switchgear temperature rise test system | |
CN203553628U (en) | Intelligent power box for base station | |
CN211208607U (en) | Monitoring device and battery management system for battery management system | |
CN106549411A (en) | Distributed power source grid-connecting apparatus | |
CN203554063U (en) | Railway crossing signal equipment power supply cabinet | |
CN106655516A (en) | Power supply equipment collection device and remote fault diagnosis system | |
CN114221323A (en) | Intelligent switching device and method for residential community residential electricity standby electric meter | |
CN205941727U (en) | Intelligence electric flux acquisition terminal | |
CN204906004U (en) | Distributed intelligent regional power grid of network layering | |
Xiong et al. | Design of power failure event reporting system based on NB-IoT smart meter | |
CN207410117U (en) | A kind of computer room and the online Centralizing inspection device of substation's UPS DC power supplies | |
CN211206765U (en) | Intelligent detection device for PT unit of outdoor ring main unit | |
CN205941681U (en) | Direct-current voltage detection system for ESD in gas transmission station field | |
CN205319694U (en) | 10kV distribution lines protects movement device | |
CN111142059A (en) | Intelligent detection device and method for PT unit of outdoor ring main unit | |
CN214900357U (en) | GNSS/MET power supply monitoring device | |
CN104993586A (en) | Monitoring information access automation identification diagnosis system and method | |
CN212158839U (en) | Power distribution equipment operation monitoring system based on NB-IOT | |
CN103972925B (en) | The grid-connected proterctive equipment of distributed photovoltaic | |
CN203911498U (en) | Distributed photovoltaic grid-connected protective equipment | |
CN102624091A (en) | Alternating current distribution multi-loop monitoring system | |
CN202014037U (en) | Demarcation switch cabinet for cable line |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
CB03 | Change of inventor or designer information | ||
CB03 | Change of inventor or designer information |
Inventor after: Wei Xiaowei Inventor after: Li Lin Inventor after: Xu Jikai Inventor after: Zhang Yihe Inventor after: Nie Xiang Inventor after: Jin Yinhan Inventor after: Wei Jiaqi Inventor after: Yue Yuxian Inventor after: Jiang Jiang Inventor after: Ru Ruirui Inventor after: Li Wei Inventor after: Shi Wei Inventor before: Nie Xiang Inventor before: Li Lin Inventor before: Xu Jikai Inventor before: Zhang Yihe Inventor before: Wei Xiaowei Inventor before: Jin Yinhan Inventor before: Wei Jiaqi Inventor before: Yue Yuxian Inventor before: Jiang Jiang Inventor before: Ru Ruirui Inventor before: Li Wei Inventor before: Shi Wei |
|
GR01 | Patent grant | ||
GR01 | Patent grant |