CN206742722U - Smart group string data pre-installed transformer sub-station - Google Patents

Abstract

The utility model discloses an intelligent string type pre-installed substation, including a power station monitoring system and a sub-array of a photovoltaic power station, the sub-array of a photovoltaic power station includes a photovoltaic unit and a substation unit, the photovoltaic unit includes a photovoltaic module and a string inverter, and the substation unit includes Cabinet and intelligent communication unit, high-voltage switchgear, transformer and low-voltage switchgear. The intelligent communication unit includes smartLogger2000 data collector and anti-PID module. Among them, the power station monitoring system communicates with smartLogger2000 data It communicates with the anti-PID module, the low-voltage switchgear monitoring module, the high-voltage switchgear monitoring module and the transformer monitoring module, and the smartLogger2000 data collector communicates with the string inverter. The power station monitoring system of the utility model realizes intelligent data collection through the smartLogger2000 data collector, thereby realizing the intelligent control and management of the substation; the anti-PID module can prevent the PID effect of the photovoltaic module, improve the operation and maintenance efficiency of the power station, and improve the safety quality of the power station.

Description

Intelligent string pre-installed substation

technical field

The utility model relates to a substation, in particular to an intelligent string type pre-installed substation, which belongs to the technical field of combined substations in the photovoltaic industry.

Background technique

The pre-installed substation is divided into American-style box-type substation and European-style box-type substation; the combined American-style box-type substation puts transformers, high-voltage load switches, fuses and other components in the transformer oil tank to form an integrated device; transformer oil is used as the live part between phases And the insulating medium to the ground, so the volume of the components is minimized, the structure is more compact, and the installation is convenient and flexible. There are instruments and meters installed in the box, such as pressure gauge, pressure relief valve, oil level gauge and oil temperature gauge and other monitoring devices. European-style box-type substation is also called "combined substation" in my country. It arranges high-voltage switchgear, distribution transformers and low-voltage distribution devices in three different compartments, and realizes electrical connection through cables or busbars. Usually, the rated voltage of the high-voltage side of the box-type substation is 3.6kV~40.5kV, and one or more transformers are installed inside, and the frequency is 50Hz. In my country, box-type substations are collectively referred to as "high-voltage/low-voltage prefabricated substations".

In recent years, my country has planned and constructed the photovoltaic industry. With the acceleration of the construction of string photovoltaic power stations, due to the large number of photovoltaic modules and other related supporting equipment in photovoltaic power stations, the efficiency of manual maintenance is low and the cost is high. Traditional Integrated photovoltaic box change can no longer meet the needs of smart grid construction. Therefore, intelligent power transformation and distribution products will become a magic weapon for various manufacturers to participate in market competition. Many manufacturers have increased investment in research and development of intelligent power transformation and distribution products. The traditional integrated photovoltaic box change can not meet the requirements of intelligence, which provides the application foundation and strong power for the intelligent development of integrated photovoltaic box change. The intelligent integrated photovoltaic box change will become the market favored in the future product. With the acceleration of the construction of photovoltaic power stations, photovoltaic box-type transformers will develop in the direction of intelligence. In the future, the development direction of integrated photovoltaic box-type transformers will be: an integrated intelligent switchgear will be adopted, which can integrate primary circuit breakers, isolating switches, electronic current and voltage transformers, intelligent interval units and power grid quality management equipment, etc., towards high reliability. , Modularization, intelligence, convenient operation, coordination with the environment, low cost and easy maintenance. It can realize self-adaptation, logical reorganization, support dynamic online tuning, online monitoring, condition maintenance, etc. The intelligent string pre-installed substation adopts modular production and can be moved by vehicle. It has the characteristics of compact structure, easy transportation, complete equipment and easy maintenance. At present, with the rapid development of my country's economy, the number of grid-connected photovoltaic power stations is increasing; the smart grid construction plan requires electrical equipment to be safe, reliable and intelligent, and the domestic market demand for smart string pre-installed substations has begun Gradually, and the existing traditional integrated photovoltaic box change can no longer meet the complex power supply market demand.

Utility model content

The purpose of the utility model is to solve the above-mentioned deficiencies in the prior art, and provide an intelligent string type pre-installed substation.

In order to achieve the above object, the technical solution adopted in the utility model is:

Intelligent string pre-installed substation, applied to string photovoltaic power station box change, including power station monitoring system and photovoltaic power station sub-array, the photovoltaic power station sub-array includes photovoltaic units and substation units, the photovoltaic unit includes photovoltaic modules and A string inverter connected to photovoltaic modules, the substation unit includes a box and an intelligent communication unit located in the box, a high-voltage switchgear, a transformer and a low-voltage switchgear, and the high-voltage switchgear has a high-voltage switchgear monitoring module, There is a transformer monitoring module in the transformer, and a low-voltage switchgear monitoring module in the low-voltage switchgear,

The intelligent communication unit includes a smartLogger2000 data collector and an anti-PID module,

Wherein, the power station monitoring system communicates with the smartLogger2000 data collector,

The smartLogger2000 data collector is respectively connected to the anti-PID module, the low-voltage switchgear monitoring module, the high-voltage switchgear monitoring module and the transformer monitoring module, and the smartLogger2000 data collector is connected to the string inverter.

Preferably, the power station monitoring system is connected to the smartLogger2000 data collector through 4GLTE wireless communication or optical fiber network.

Preferably, the smartLogger2000 data collector is communicatively connected to the string inverter through PLC.

Preferably, the smartLogger2000 data collector communicates with the anti-PID module, switch measurement and control module, low-voltage switchgear monitoring module, high-voltage switchgear monitoring module and transformer monitoring module through the 485 bus.

Further, the high-voltage switchgear monitoring module and the transformer monitoring module are respectively provided with a temperature and humidity monitor, and the temperature and humidity monitor includes a single-chip communication serial port, and the single-chip communication serial port of the temperature and humidity monitor communicates bidirectionally with the smartLogger2000 data collector connected.

Preferably, the anti-PID module is a Huawei anti-PID module used to prevent the attenuation of the output power of the battery panel due to potential-induced attenuation in the photovoltaic power generation system.

The beneficial effects of the utility model are mainly reflected in:

1. The power station monitoring system realizes intelligent data collection through the smartLogger2000 data collector, so as to realize the intelligent control and management of the substation;

2. The anti-PID module can prevent the PID effect of photovoltaic modules, improve the efficiency of power station operation and maintenance, and improve the safety and quality of the power station.

Description of drawings

Fig. 1 is a structural schematic diagram of the intelligent string type pre-installed substation of the utility model.

detailed description

The utility model provides an intelligent string type preinstalled substation. The technical scheme of the utility model is described in detail below in conjunction with the accompanying drawings, so as to make it easier to understand and grasp.

The technical solution adopted by the utility model: as shown in Figure 1, the intelligent string type pre-installed substation is applied to the string type photovoltaic power station box change, including the power station monitoring system 1 and the photovoltaic power station sub-array 2, and the photovoltaic power station sub-array 2 includes The photovoltaic unit 3 and the substation unit 4. The photovoltaic unit 3 includes a photovoltaic module 31 and a string inverter 32 connected to the photovoltaic module 31. The substation unit 4 includes a cabinet and an intelligent communication unit 5 and a high-voltage switchgear 6 located in the cabinet. , the transformer 7 and the low-voltage switchgear 8, the high-voltage switchgear 6 has a high-voltage switchgear monitoring module 61, the transformer 7 has a transformer monitoring module 71, the low-voltage switchgear 8 has a low-voltage switchgear monitoring module 81, and the intelligent communication unit 5 includes smartLogger2000 data collector 51, anti-PID module 52.

Specifically, the power station monitoring system communicates with the smartLogger2000 data collector, and the smartLogger2000 data collector communicates with the anti-PID module, the low-voltage switchgear monitoring module, the high-voltage switchgear monitoring String inverter communication connection.

More specifically, the intelligent string-type pre-installed substation uses an oil-immersed transformer, which has better heat dissipation. The SmartLogger2000 data collector and PID module are integrated into the low-voltage power distribution cabinet of Jinyou Box Substation, and cooperate with Huawei's intelligent solution to realize intelligent management. PLC communicates with string inverters, and PLC is power line carrier communication, which not only enables the photovoltaic power station to have the anti-PID function, but also realizes intelligent management of equipment in the station, improves the operation and maintenance efficiency of the power station, and improves the safety and quality of the power station.

The smartLogger2000 data collector can obtain high-voltage load switch close, high-voltage fuse blown signal, box-change door position signal, thermostat signal, and circuit breaker opening and closing from the low-voltage switchgear monitoring module, high-voltage switchgear monitoring module, and transformer monitoring module. Signal, surge fault signal, etc., can remotely signal the switch status of high and low voltage switchgear. In addition, the smartLogger2000 data collector is actually connected to the temperature controller of the transformer and the smart meter of the low-voltage cabinet. The smart meter of the low-voltage cabinet can measure the active power and reactive power of the low-voltage side and perform power quality analysis.

The smartLogger2000 data collector is described in detail. It is a highly integrated photovoltaic power generation system monitoring and management platform dedicated device, which realizes interface convergence, protocol conversion, data acquisition, data storage, centralized monitoring and monitoring of various devices in the photovoltaic power generation system. Centralized maintenance and other functions.

The specific communication connection method of the intelligent string type pre-installed substation is as follows: the power station monitoring system is connected to the smartLogger2000 data collector through 4GLTE wireless communication or optical fiber network. The smartLogger2000 data collector communicates with the string inverter through PLC. The smartLogger2000 data collector communicates with the anti-PID module, switch measurement and control module, low-voltage switchgear monitoring module, high-voltage switchgear monitoring module and transformer monitoring module through the 485 bus.

In a preferred embodiment, the high-voltage switchgear monitoring module and the transformer monitoring module are respectively provided with a temperature and humidity monitor, the temperature and humidity monitor includes a single-chip communication serial port, and the single-chip communication serial port of the temperature and humidity monitor is connected to the smartLogger2000 data collector for two-way communication.

Finally, it should be noted that the anti-PID module is a Huawei anti-PID module used to prevent the attenuation of the output power of the panel due to potential-induced attenuation in the photovoltaic power generation system. The PID effect is the potential-induced attenuation. PID (Potential Induced Degradation) means Potential Induced Degradation, which leads to a reduction in the power generation efficiency of solar modules. The anti-PID module is a device to prevent this phenomenon. The anti-PID module communicates with the data collector, and the incoming line terminal is connected to the busbar of the low-voltage cabinet , Through data collection, the inverter voltage information is used to control the AC ground injection voltage, and the inverter provides daily power generation, total power generation, inverter input and output current, input and output voltage, module IV curve, etc. The PID module automatically adjusts the output voltage according to the inverter voltage, so that the voltage of all PV panels to ground is positive.

The smartLogger2000 data collector is a special device for the monitoring and management platform. The power station monitoring system realizes intelligent control and management of each sub-array of the photovoltaic power station through its mining and analysis of telemetry data. Obtain inverter data, switch status of high and low voltage cabinets, power parameters, transformer winding temperature, door position status and other parameters from data acquisition, and compare the results of these data with normal values to determine whether the equipment is operating in a normal state. The device or component number of the fault point is used to locate the fault point. The smartLogger2000 data collector communicates with the anti-PID module, switch measurement and control module, low-voltage switchgear monitoring module, high-voltage switchgear monitoring module and transformer monitoring module through the 485 bus to collect the operating status data of related equipment and remotely control related equipment. The power station monitoring system realizes the intelligent management of low-voltage switchgear, high-voltage switchgear, oil-immersed transformer, anti-PID module, and inverter components through the analysis and mining of telemetry data, conducts power quality analysis, intelligently locates faults, and intelligently judges sub-arrays Whether the relevant equipment is in healthy operation, and send diagnostic information in time, realize efficient operation and maintenance, and improve the safety and quality of the power station.

From the above description, it can be found that the power station monitoring system of the present invention realizes intelligent data collection through the smartLogger2000 data collector, thereby realizing intelligent control and management of the substation; the anti-PID module can prevent the PID effect of the photovoltaic module, improve the efficiency of power station operation and maintenance, and improve Power station safety and quality.

The technical solution of the utility model has been fully described above. It should be noted that the specific implementation of the utility model is not limited by the above description. All technical solutions formed by equivalent transformation or equivalent transformation in terms of functions and other aspects fall within the protection scope of the present utility model.

Claims (6)

1. Intelligent string-type pre-installed substation, applied to string-type photovoltaic power station box transformation, characterized by: including power station monitoring system and photovoltaic power station sub-array, The sub-array of the photovoltaic power station includes a photovoltaic unit and a substation unit. The photovoltaic unit includes a photovoltaic module and a string inverter connected to the photovoltaic module. A switchgear, a transformer and a low-voltage switchgear, the high-voltage switchgear has a high-voltage switchgear monitoring module, the transformer has a transformer monitoring module, and the low-voltage switchgear has a low-voltage switchgear monitoring module, The intelligent communication unit includes a smartLogger2000 data collector and an anti-PID module, Wherein, the power station monitoring system communicates with the smartLogger2000 data collector, The smartLogger2000 data collector is respectively connected to the anti-PID module, the low-voltage switchgear monitoring module, the high-voltage switchgear monitoring module and the transformer monitoring module, and the smartLogger2000 data collector is connected to the string inverter. 2. The intelligent string type pre-installed substation according to claim 1, characterized in that: the power station monitoring system is connected to the smartLogger2000 data collector through 4GLTE wireless communication or optical fiber network. 3. The intelligent string-type pre-installed substation according to claim 1, characterized in that: the smartLogger2000 data collector is connected to the string-type inverter through PLC communication. 4. The intelligent string type pre-installed substation according to claim 1, characterized in that: the smartLogger2000 data collector communicates with the anti-PID module, switch measurement and control module, low-voltage switchgear monitoring module, and high-voltage switchgear monitoring module through the 485 bus Communication connection with the transformer monitoring module respectively. 5. The intelligent string type pre-installed substation according to claim 1, characterized in that: the high-voltage switchgear monitoring module and the transformer monitoring module are respectively provided with temperature and humidity monitors, and the temperature and humidity monitors include single-chip communication serial ports , the single-chip communication serial port of the temperature and humidity monitor is connected with the smartLogger2000 data collector for two-way communication. 6. The intelligent string-type pre-installed substation according to claim 1 or 4, characterized in that: the anti-PID module is a Huawei anti-PID module used to prevent the attenuation of the output power of the battery panel due to potential-induced attenuation in the photovoltaic power generation system module.