Solar grid connected operation control strategy

Under the grid connected operation mode, the voltage and frequency of microgrid are all supported by power grid, and each micro source adopts P/Q control mode. The specific control strategy: The working state of the central controller loop to detect the micro source and the load, in the power grid power generation without restrictions, to the maximum output of photovoltaic and wind turbine regulating mode, the energy storage system with electricity hot standby state.
When the micro grid load is less than the micro source of total power generation, photovoltaic and wind turbine power supply spare power to the power grid, when the total generating capacity of micro grid load is larger than the micro source, supplied power from the grid. In the main power grid is limited, determine whether the send power back to the grid, when there is excess electricity to power grid, control the micro source of P and Q, the micro grid to power grid scheduling should not exceed the limit. It can also control the energy storage at peak discharge according to different power price at peak time and valley time, and discharge during valley time, so as to maximize the economic benefit of microgrid operation by using renewable energy.
In the grid operation, there will be some unexpected situations. For example, a blower or PV automatically exit running due to overheating fault, micro controller source to inform the central controller. After the failure has been relieved, then meet the grid conditions, the micro controller sends the grid request information to the central controller, the central controller sends the zero output grid instructions, recalculate the current power generation and power consumption of microgrid, gradually increase the output of the new micro grid source.
In the grid, the load management is simple, when receiving a load out or incorporated into the micro grid, as long as the records, and then recalculate the new power and electricity, according to the need to make appropriate adjustments to the power. The feeder level and substation level micro grid, may also receive the main peak of some scheduling order, this time to the microgrid to assess the situation, to meet the conditions, control of energy storage equipment, charge and discharge in accordance with the time node scheduling.
If the main power overhaul, generally know in advance what time the power cut off, the central controller will control the microgrid in power before the initiative entering the grid operation. If the main fault is detected, the grid voltage or frequency of serious overrun, and outlets of the protection or the controller of quick action, micro grid into passive off grid.

SOROTEC Solar MPPT Charge Controller 60A 3200W 12V 24V 48V

1. Intelligent maximum power point tracking technology increases efficiency 25%~30%
2. Compatible for PV systems in 12v, 24v or 48v
3. Three-stage charging optimizes battery performance
4. Maximum charging current up to 60a
5. Maximum efficiency up to 98%
6. Battery temperature sensor (BTS) automatically provides temperature compensation
7. Support wide range of lead-acid batteries including wet, AGM, and gel batteries
8. Multi-function LCD displays detailed information

评论

发表评论

此博客中的热门博文

Correct selection of backup time for UPS

图片
UPS backup time is generally a problem concerned by customer in the purchase process. Usually most people prefer to choose the  UPS  which power backup the longer the better, in fact, this is not correct. We must firstly clear that the seller will usually have standard type UPS and long-acting UPS. Standard type UPS with built-in battery, after a power interruption can supply power to the load equipment in general for a few minutes to tens of minutes, of course, the length of time depends on the load. Long acting UPS can not only meet the power requirement of load, but also meet the requirements of customers and work types and so on, so the long-term UPS is usually equipped with an external battery pack. If the client is not particularly strict to the work condition of the load, and the power of the load is not particularly large, usually with standard type UPS would be enough. Because the choice of long backup time UPS is bound to increase the number of battery groups an...
阅读全文

126th Canton Fair

图片
On Oct 15th 2019, as one of the most important trade promotion platforms for Chinese enterprises to expand the global market, Canton Fair in Guangzhou focused on highlighting innovation driven, and “independent brand” became a high-frequency word of Canton Fair. Xu Bing, a spokesman for the Canton Fair and deputy director of the China Foreign Trade Center, said that the domestic and foreign environment faced by China’s foreign trade development this year is more complex and uncertain. The majority of exhibitors accelerated quality improvement and innovation, and continued to make efforts in technology research and development, product innovation, brand cultivation, etc., with high technology, high quality, high added value and independent brand products emerging. Many independent innovative R & D products are welcomed by the market. At the same time, purchasers are less sensitive to price and pay more attention to the technology, brand, quality and service of products. In ...
阅读全文

How to maximize the efficiency of your UPS

图片
1.Use of AC voltage regulator After using  UPS power supply , there is no need to add AC voltage regulator. If it must be added, it should be added to the front level of UPS, that is, the mains power first passes through the AC voltage regulator, then through the ups, and then to the load. 2.Battery balanced charging skills At present, valve regulated lead-acid battery (VRLA) used in many ups power supply is called maintenance free battery from the beginning, which gives users a misunderstanding that it seems that this battery is durable and does not need maintenance at all. Under this kind of misleading, many users have not carried out maintenance and management since they installed the battery. When the battery in UPS power supply meets the following conditions, the battery shall be charged evenly: when the terminal voltage is lower than the specified calibration voltage due to excessive discharge. For 12 V small sealed lead-acid batteries, the discharge calibration voltage is...
阅读全文