Photovoltaic power station integrated monitoring system and photovoltaic power station

Abstract

The invention belongs to a monitoring system, and provides a photovoltaic power station integrated monitoring system and a photovoltaic power station, aiming at solving the technical problem that the existing photovoltaic power station needs to spend more time and energy to carry out system integration and debugging so as to realize data sharing and exchange. Comprising an operator station, a data server, an AGC / AVC controller, an in-station communication acquisition device and a telecontrol device, the functions of data acquisition, data processing, data management, data control and adjustment and the like are subjected to integrated management, an integrated monitoring system is formed, daily production monitoring and management can be fully met, and compared with an existing monitoring system for molecular system work, the monitoring system has the advantages that the production efficiency is improved, and the production cost is reduced. According to the integrated monitoring system, the integrated system is built through coordination work of all the parts, management is facilitated, the working efficiency and the safety and reliability of data are effectively improved, and actual difficulties existing during data sharing and exchange do not need to be considered any more.

Description

Technical Field

[0001] The present application relates to a monitoring system, and specifically to an integrated monitoring system for a photovoltaic power station and a photovoltaic power station. Background Art

[0002] With the rapid development of photovoltaic power stations, the operation and maintenance of photovoltaic power stations has become an important issue. There are many problems with traditional operation and maintenance methods, such as low operation and maintenance efficiency, untimely fault handling, and high labor costs. At the same time, due to the numerous monitoring subsystems of photovoltaic power stations, such as SCADA system, five-defense system, AGC (Automatic Generation Control) system, AVC (Automatic Voltage Control) system, etc., these monitoring subsystems are very important components of photovoltaic power stations. Since different monitoring subsystems may come from different suppliers, they may differ in system architecture, data format, communication protocol, etc., resulting in certain problems in data integration and interoperability. In order to solve these problems, photovoltaic power stations need to spend more time and energy on system integration and debugging to ensure that each subsystem can work together and realize data sharing and exchange. Summary of the invention

[0003] This application aims to solve the technical problem that photovoltaic power stations currently need to spend more time and energy on system integration and debugging in order to achieve data sharing and exchange, and provides an integrated monitoring system for photovoltaic power stations and a photovoltaic power station.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions: In a first aspect, the present application proposes an integrated monitoring system for a photovoltaic power station, including: an operator station, a data server, an AGC / AVC controller, an in-station communication collection device, and a telecontrol device; The data server is used for data collection of on-site equipment by the monitoring system, communication with the superior dispatching system and the centralized control system, storage of historical data of the photovoltaic power station, and unified management of the integrated monitoring system data.

[0005] The operator station is used to enable the operator to manually send manual instructions to the AGC / AVC controller or the inverter of the photovoltaic power station; The telecontrol device is used to receive control instructions from the dispatching system and send the control instructions to the AGC / AVC controller through the data server; The AGC / AVC controller is used to perform logical operations according to received control instructions and / or manual instructions, complete power distribution, and control the inverter of the photovoltaic power station to perform corresponding actions; The in-station communication collection device is used to collect the electric energy and local meteorological data of the photovoltaic power station, and send them to the big data collection and control center through the telecontrol device.

[0006] Furthermore, the AGC / AVC controller adopts a server-type controller.

[0007] Furthermore, the AGC / AVC controller adopts a redundant configuration.

[0008] Furthermore, the AGC / AVC controller is embedded, has a built-in system-on-chip processor, and is based on a QNX real-time operating system.

[0009] Furthermore, the control strategy of the AGC / AVC controller adopts graphical configuration.

[0010] Furthermore, it also includes a five-defense operation station; The five-defense operation station is used to issue five-defense operation tickets, communicate with the five-defense key through the serial port, transfer the operation ticket to the five-defense key, and then communicate with the data server to forward the corresponding unlocking information to the corresponding database.

[0011] In the second aspect, the present application proposes a photovoltaic power station, including a photovoltaic power station body, a dispatching system and a big data control center; and also includes the above-mentioned photovoltaic power station integrated monitoring system.

[0012] Furthermore, the photovoltaic power station body includes a communication management machine and field equipment; The field equipment includes an inverter, a combiner box and a box transformer, and the field equipment is connected to a communication management machine via Modbus; The communication management machine and the data server communicate via the IEC104 protocol.

[0013] Furthermore, a ring network is used between the on-site communication management machines.

[0014] Furthermore, the telecontrol device adopts a redundant configuration.

[0015] The dispatching system includes a real-time switch, a real-time longitudinal encryption device, a dispatching router and a dispatching data network which are connected in sequence from the side close to the photovoltaic power station integrated monitoring system; The big data control center includes a big data remote motor, a big data switch, a big data firewall, a big data router and a big data center which are connected in sequence from the side close to the integrated monitoring system of the photovoltaic power station.

[0016] Compared with the prior art, this application has the following beneficial effects: The present application proposes an integrated monitoring system for a photovoltaic power station, including an operator station, a data server, an AGC / AVC controller, an in-station communication collection device and a remote control device, which integrates the functions of data collection, data processing, data management, data control and regulation to form an integrated monitoring system that can fully meet the needs of daily production monitoring and management. Compared with the current monitoring system working in a molecular system, in the integrated monitoring system of the present application, an integrated integrated system is built through the coordination of various parts, which is easy to manage, effectively improves work efficiency and data security and reliability, and there is no need to consider the practical difficulties in data sharing and exchange.

[0017] The present application also proposes a photovoltaic power station, including the aforementioned photovoltaic power station integrated monitoring system, which has all the advantages of the aforementioned photovoltaic power station integrated monitoring system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of an integrated monitoring system for a photovoltaic power station in this application; Figure 2 This is a schematic diagram of a photovoltaic power station for this application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] With the rapid development of photovoltaic power stations, the operation and maintenance of photovoltaic power stations has become a vital issue. In order to ensure the efficient and stable operation of photovoltaic power stations, it is necessary to use a variety of photovoltaic power station monitoring subsystems, among which the SCADA system, five-defense system, AGC system, AVC system, etc. play a key role. The SCADA system is a comprehensive automation control system used to monitor, control and collect data from photovoltaic power stations. It can monitor the power generation, meteorological conditions, voltage, current and other key parameters of photovoltaic power stations in real time to ensure that the operating status of the power station is under control, and conduct in-depth analysis of the collected data to help operation and maintenance personnel understand the overall operation of the power station and optimize the operation strategy. It can also perform fault diagnosis through intelligent algorithms, discover and deal with problems in a timely manner, and ensure the stable operation of the power station. The five-defense system is an important safeguard for the safe operation of photovoltaic power stations, which usually includes preventing misconnection and mismatch. breaker ; Prevent opening and closing under load Disconnector ; Prevent live hanging (closing) Ground wire ( Earthing switch); prevent the circuit breaker from being closed with the grounding wire (grounding switch); prevent the accidental entry into the live interval. The AGC system satisfies the real-time changes in the power demand of the power grid by controlling the output of the photovoltaic inverter. Its main functions usually include active power control (automatically adjusting the active output of the photovoltaic power station according to the grid dispatching instructions to maintain the stability of the grid frequency and power), optimized allocation (optimizing the allocation of active power according to the operating status and adjustable margin of the inverter to extend the service life of the inverter), and real-time response (able to quickly respond to the grid dispatching instructions to ensure the coordinated operation of the photovoltaic power station and the grid). The AVC system is used to automatically adjust the grid voltage and reactive power to improve the voltage quality and economy of the grid. It is usually used for voltage regulation, reactive optimization and coordinated control. The SCADA system, the five-defense system, the AGC system and the AVC system play an irreplaceable role in the operation and maintenance of photovoltaic power stations. Together, they constitute the core part of the photovoltaic power station monitoring system, providing a strong guarantee for the safe and efficient operation of photovoltaic power stations. However, there may be differences between these monitoring subsystems in terms of system architecture, data format, communication protocol, etc., making it difficult to work together, which seriously affects the monitoring effect.

[0027] Based on the above situation, the present application proposes an integrated monitoring system for a photovoltaic power station and a photovoltaic power station. The present application is described in detail below in conjunction with embodiments and drawings.

[0028] like Figure 1 As shown, it is a first schematic diagram of an integrated monitoring system for a photovoltaic power station of the present application, which may include an operator station, a data server, an AGC / AVC controller, an intra-station communication collection device and a telecontrol device.

[0029] The operator station is used to allow the operator to manually issue manual instructions to the AGC / AVC controller. In actual applications, the operator station can provide a human-machine interface so that the operator can directly input manual instructions. By setting up the operator station, the operator can be allowed to manually control the AGC / AVC controller, such as adjusting power output, changing control mode, etc.

[0030] The telecontrol device is used to receive control instructions from the dispatching system and send the control instructions to the AGC / AVC controller through the data server. It should be noted that the telecontrol device can serve as a communication bridge between the photovoltaic power station and the superior dispatching system, receive control instructions from the dispatching system, and forward these control instructions to the AGC / AVC controller, and can also feed back the status information of the power station to the superior dispatching system.

[0031] The AGC / AVC controller is used to perform logical operations according to the received control instructions and / or manual instructions, complete power distribution, and control the inverter of the photovoltaic power station to perform corresponding actions. It should be noted that the AGC / AVC controller can perform logical operations according to the received control instructions (from the telecontrol device) and / or manual instructions (from the operator station), complete the power distribution task, ensure that the photovoltaic power station operates according to the instructions, and control the inverter to perform corresponding actions, such as adjusting the output power, switching the working mode, etc.

[0032] The in-station communication collection device is used to collect the power and local meteorological data of the photovoltaic power station, and send it to the big data control center through the telecontrol device. In actual applications, the in-station communication collection device is mainly responsible for collecting the real-time power data and local meteorological data of the photovoltaic power station, and sending these data to the big data control center through the telecontrol device for further analysis, monitoring and management.

[0033] This application completes integrated monitoring through the coordinated control of the operator station, data server, AGC / AVC controller, in-station communication collection device and telecontrol device. The operator sends manual instructions to the AGC / AVC controller or photovoltaic inverter through the operator station for manual control. The telecontrol device receives the control instructions from the dispatching system and forwards them to the AGC / AVC controller. The AGC / AVC controller performs logical operations based on the received instructions, completes power distribution, and controls the inverter to perform corresponding actions. The in-station communication collection device collects electric energy and meteorological data in real time, and sends it to the big data control center through the telecontrol device for monitoring and management. Such an integrated monitoring system ensures the efficient and stable operation of the photovoltaic power station, while providing flexible manual and automatic control functions.

[0034] As a second embodiment of the integrated monitoring system of the photovoltaic power station of the present application, it can include an operator station, a data server, an AGC / AVC controller, an in-station communication collection device, a telecontrol device, a five-protection operation station, a clock synchronization device and a safety protection system.

[0035] The data server can realize the communication between the host computer and the telecontrol device, the communication management machine in the photovoltaic power station, and the AGC / AVC controller, as well as the monitoring software application management, data processing and historical data storage. It should be noted that the data server, as an intermediate node, can forward the host computer's instructions to the telecontrol device and feed back the status information of the telecontrol device to the host computer. The data server communicates with the communication management machine to realize real-time monitoring of the power station equipment status and data collection. In addition, the data server can provide the real-time data required by the monitoring software and support the various monitoring functions of the software. The monitoring software can control and adjust the remote equipment through the data server.

[0036] The telecontrol device can realize the communication between the photovoltaic power station and the upper dispatching system and the large data control center, and realize data collection through IEC104. It should be noted that IEC104 is an international standard for telecontrol communication in power systems. It defines the data exchange format and communication protocol between the control center and the remote terminal in the power system, and can realize efficient and reliable data collection and communication.

[0037] The AGC / AVC controller is responsible for the power and voltage control of the entire plant. It adopts dual redundant control and supports the IEC61850 communication model. The dispatching system sends the control instructions to the telecontrol device, which sends the control instructions to the AGC / AVC controller through the data server. The AGC / AVC controller performs logical operations, completes power distribution, and sends it to the inverter.

[0038] Photovoltaic AGC or ACV system is an automatic control system designed specifically for photovoltaic power stations, which can realize real-time monitoring and regulation of photovoltaic power station power. At present, the AGC or AVC systems of photovoltaic power stations are all in the form of servers, and the control strategies are all implemented using code. The variable parameters are introduced after the script program is compiled and packaged to realize the AGC or AVC system adjustment. Users cannot know the actual control logic and the real-time values ​​of each variable during the logical operation process. Therefore, the operation cycle is long and the program debugging is difficult. If you want to optimize the control strategy, you need to exit the AGC or AVC system control and rewrite the script program, which is difficult to achieve.

[0039] The AGC / AVC controller in this application is an embedded device that uses a high-performance SOC processor for signal processing. It is based on a fully redundant design with controller redundancy, power supply redundancy, and network redundancy, which can effectively improve safety. Multi-task scheduling technology is used at the software level, and the ARM operation is based on the QNX real-time operating system. The system is stable and responsive, and the minimum calculation cycle can reach 5ms.

[0040] The AGC / AVC controller in this application improves the stability and safety of the AGC / AVC regulation equipment. At the same time, the AGC / AVC controller calculation cycle can be flexibly configured with 8 task cycles, with a minimum calculation cycle of 5ms and a maximum calculation cycle of 1s. It adopts a multi-task scheduling and regulation technology based on time slices to achieve a rapid power regulation function, ensuring that all control logics are executed under the fastest task, thereby enhancing the real-time performance of the device.

[0041] At present, the AGC / AVC controls of photovoltaic power stations are all independent systems. The photovoltaic equipment operation data required by the control strategy needs to be collected by the equipment to establish a separate communication channel for transmission, which adds additional operation and maintenance work. To address this problem, this application proposes unified database management. After the equipment operation process data is communicated to the SCADA database, the database is uniformly managed and synchronized to the AGC / AVC device for calculation, thereby reducing communication failure points and reducing operation and maintenance work.

[0042] The in-station communication collection device can collect electricity meter and local meteorological data.

[0043] The five-prevention operation station can be responsible for the five-prevention operation invoicing, communicate with the five-prevention key through the serial port, transfer the operation ticket to the key, and synchronize the unlocking information to the database. Specifically, the five-prevention operation station can generate operation tickets that meet the "five-prevention" requirements according to the operation rules of the power system and the status of the on-site equipment. These operation tickets are designed to prevent electrical misoperation and ensure the safety of the power grid. During the invoicing process, the system will make logical judgments to ensure that each step of the operation complies with safety regulations. The five-prevention operation station and the five-prevention key establish a communication connection through the serial port. This communication method allows the operation station to safely and accurately transmit the generated operation ticket to the five-prevention key. After receiving the operation ticket, the five-prevention key will serve as the basis for on-site operation to ensure that the operator operates according to the predetermined steps. During the operation, the five-prevention operation station may synchronize key data such as unlocking information and operation records to the data server. The data server is responsible for storing this data for subsequent analysis, query and audit. Therefore, the five-prevention operation station can ensure that the switching operation of the power system complies with safety regulations, while realizing the recording and storage of operation data, providing strong support for the safe operation of the power system.

[0044] Based on the above photovoltaic power station integrated monitoring system, such as Figure 2 As shown, the present application also proposes a photovoltaic power station, which may include a photovoltaic power station body, a dispatching system, a big data control center and the aforementioned photovoltaic power station integrated monitoring system.

[0045] In actual applications, the centralized monitoring and unified management of the entire photovoltaic power station can be achieved based on the three parts of the station layer, communication layer, and photovoltaic area. The station layer is the aforementioned integrated monitoring system of the photovoltaic power station. The communication layer is composed of switches and firewall devices, and the switches are configured with dual network redundancy. The photovoltaic area adopts a ring network, and the photovoltaic area includes a communication management machine and field equipment, supporting Modbus communication model and 104 communication model. The field equipment includes inverters, junction boxes, and box transformers, which are connected to the station-side communication management machine through Modbus. The station-side communication management machine forwards data to the monitoring system through 104. The AGC / AVC controller has visual configuration technology, and the control strategy adopts graphical configuration, which is easy to maintain and optimize. The control algorithm of AGC / AVC is implemented with graphical, modular and visual control logic, which is convenient for modification and debugging, and improves operation and maintenance efficiency.

[0046] This application adopts an integrated system, which can share a database, facilitate maintenance, and improve work efficiency and data security reliability. It has data acquisition, data processing, database management, control and adjustment functions, alarm recording and printing, voice alarm and query, system service management functions, etc., which can meet daily production monitoring and management. The AGC / AVC controller adopts a redundant configuration, which can improve safety, fast computing speed, and significant control effect. And the control logic of the AGC / AVC controller is independent of the SCADA server in the photovoltaic area, which can improve reliability. It should be noted that the above-mentioned alarm recording and printing, voice alarm and query, and system service management functions can be respectively set up with corresponding functional modules to deal with normal and abnormal situations in the monitoring process accordingly.

[0047] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A photovoltaic power station integrated monitoring system, characterized in that: include: Operator station, data server, AGC / AVC controller, in-station communication collection device and telecontrol device; The data server is used to collect data from on-site equipment, communicate with the superior dispatching system and centralized control system, and store historical data of the photovoltaic power station; The operator station is used to enable the operator to manually send manual instructions to the AGC / AVC controller or the inverter of the photovoltaic power station; The telecontrol device is used to receive control instructions from the dispatching system and send the control instructions to the AGC / AVC controller through the data server; The AGC / AVC controller is used to perform logical operations according to received control instructions and / or manual instructions, complete power distribution, and control the inverter of the photovoltaic power station to perform corresponding actions; The in-station communication collection device is used to collect the electric energy and local meteorological data of the photovoltaic power station, and send them to the big data collection and control center through the telecontrol device.

2. The photovoltaic power station integrated monitoring system according to claim 1, characterized in that: The AGC / AVC controller is a server-type controller.

3. The photovoltaic power station integrated monitoring system according to claim 2, characterized in that: The AGC / AVC controller adopts a redundant configuration.

4. The photovoltaic power station integrated monitoring system according to claim 3 is characterized in that: The AGC / AVC controller is embedded with a system-on-chip processor and is based on a QNX real-time operating system.

5. The photovoltaic power station integrated monitoring system according to claim 4, characterized in that: The control strategy of the AGC / AVC controller adopts graphical configuration.

6. The photovoltaic power station integrated monitoring system according to claim 5, characterized in that: It also includes a five-defense operation station; The five-defense operation station is used to issue invoices for five-defense operations, communicate with the five-defense key through the serial port, transfer the operation ticket to the five-defense key, and synchronize the corresponding unlocking information to the corresponding database.

7. A photovoltaic power station, comprising a photovoltaic power station body, a dispatching system and a big data control center; characterized in that: It also includes the photovoltaic power station integrated monitoring system as described in any one of claims 1 to 5.

8. The photovoltaic power station according to claim 7, characterized in that: The photovoltaic power station body includes a communication management machine and field equipment; The field equipment includes an inverter, a combiner box and a box transformer, and the field equipment is connected to a communication management machine via Modbus; The communication management machine and the data server communicate via the IEC104 protocol.

9. The photovoltaic power station according to claim 8, characterized in that: A ring network is used between the on-site communication management machines.

10. The photovoltaic power station according to claim 9, characterized in that: The telecontrol device adopts a redundant configuration; The dispatching system includes a real-time switch, a real-time longitudinal encryption device, a dispatching router and a dispatching data network which are connected in sequence from the side close to the photovoltaic power station integrated monitoring system; The big data control center includes a big data remote motor, a big data switch, a big data firewall, a big data router and a big data center which are connected in sequence from the side close to the integrated monitoring system of the photovoltaic power station.

Images