3-grid system power has the advantage
And off-grid power systems solar system generation grid has the following advantages:
1. The use of clean energy and renewable solar energy naturally, do not consume non-renewable and limited resources, the carbon content of fossil fuels, the use of greenhouse gas emissions and emissions of pollutants, and harmony of the ecological environment, and in accordance with the economic and social development strategy. PC764 Y9943 Latitude D620 battery
2. Electricity can be injected into the network as a network storage device. When the load power is high, solar electric energy shortage on the purchase of electricity to the city. Although the burden is small or does not use electricity, you can sell electricity to the electricity surplus. At the rear, according to the principle of the grid system and the elimination of the battery, thereby broadening the scope of use and flexibility, improve the MTBF of the system and the battery of secondary pollution, and reduce costs.
3. Components of photovoltaic cells and the construction of the perfect combination of these two sectors, but also as building materials and decorative materials to make full use of material resources to play a variety of functions, not only reduce construction costs and also allow the building to improve the scientific content and technology to increase the “points of sale.” PA3399U-2BRS PA3465U-1BRS
4. Distributed construction of distributed power generation and supply the nearest place to get in and out of network flexibility, not only strengthen the power of resisting war and disasters, and helps to improve the system of ‘load balancing power and reduces line losses.
4, the impact on solar power system
As part of the density of solar photovoltaic and low, stable poor, poor regulatory capacity of power generation by the weather and geographical impact of the power grid will provide greater security, stability economic cooperation, and quality of power supply due to a certain extent.
1. For the impact of the trend line
Without access to grid-connected photovoltaic systems, where the distribution trend line is usually a one-way flow and that the distance between the post and increase monotonically to reduce active power. However, when the dispersed network access energy distribution after the system fundamentally changed the pattern of the trend and the trend has become unpredictable. VGP-BPS8 VGP-BPS8A VGP-BPL8 PV system power generation and the network later, when the right system for photovoltaic electricity to power the output power, under the system of photovoltaic power generation and load of the spatial relationship along the trend line may be added may also be reduced. When the line of photovoltaic system output is greater than the load current, the line portions of all or part of the trend may be reversed. The trend of this unconventional mode will produce a wide range of effects such as changes in the trend, it is difficult to maintain voltage regulation; also lead to equipment distribution network voltage control ( such as voltage regulators to not load tap transformers, switches capacitor group) abnormal response, and the flow of the sub-station photovoltaic power generation system when the tide is large enough, the system photovoltaic power generation in the vicinity of the device may be more overload or voltage limit, thereby affecting the reliability of the system. Meanwhile, the new generation of photovoltaic power systems, because of their great influence on the output by the weather, with random changes, which makes the system, the random nature of the trend.
2. For system protection
When the grid then there are several scattered power after the short circuit will increase, leading to more protection against surges to failure and excessive load short-circuit will also affect labor fuses. In addition, no prior access to the system of photovoltaic power generation is generally radial distribution network, its protection has no meaning, while access to the system of photovoltaic power generation, all distribution network includes more power in a network of tidal flow uncertainty, therefore, should require the installation of a directional protection, but fuses traditional and automatic re-closing devices has no direction. The protection system is based on traditional design of the radial grid-based, distributed generation in distribution network in the deep demand for basic protection system design should also be amended accordingly. VGP-BPS2 VGP-BPS2A VGP-BPS2C
3. Do not reduce the amount of the traditional owners of rotating machinery
As the grid-connected PV system has the capacity to peak load and frequency modulation, which will power the load early evening peak and the impact of peak load. Because grid-connected PV system to increase the capacity of energy production does not reduce the generating units of power system has a volume or redundant, it must be a photovoltaic power generation to prepare reserve units corresponding spinning for peak morning peak and evening peak problems. Grid-connected PV systems to the grid is a unit decrease in the use of the cost of a few hours. It is of course the power suppliers do not want to see.
Occur due to the cyclical nature of sun and loads, photovoltaics connected to the network to increase capacity and does not reduce the demand on the power installed capacity. When a city grid photovoltaic roof and reached a certain size, if a radical change in the geographical weather, power grids will be connected to the PV system to provide spinning reserve units of regional capacity and adequate compensation of reactive power to control and adjust the system frequency and voltage. In this case, the grid will be sacrificed at the expense of economic cooperation to ensure security and stability of operation of the supply network. VGP-BPL8A VGP-BPS9 VGP-BPS9A/B
4. For the impact of power quality
Access network will spread fluctuation of voltage supply and flicker, and harmonics. Large photovoltaic power generation system startup, or system output of photovoltaic power generation or a sudden change took place will cause a greater change in voltage fluctuations and flicker. As the system of photovoltaic power generation as a source of energy distributed itself is a source of harmonics and a portion of the grid signal broadcast by the access inverter, so inevitable that produces harmonics.
5. Energy saving effects of emission reduction should be explored in depth
Grid one of the main advantages of the use of other fossil fuels. As grid-connected solar power plants for electricity generation increased by turning the generator spinning reserve or backup system, therefore, grid-connected PV real savings rate should be lower spinning reserve or loss of hot standby energy. PV system power production efficiency and reduce consumption should be taken into account due to grid connected photovoltaic system provides power unit has led to the use of utilities to reduce the number of hours to bring efficiency losses. As the power system as a race together, connected to the electricity transmission grid photovoltaics would be contrary to the interests of other producers of electricity, which is that policymakers must consider. VGP-BPS9/S VGP-BPS9/B VGP-BPS9A
Photovoltaic effect caused by emission reductions should take into account the heat of sulfur dioxide and carbon dioxide must be solved, because when the photovoltaic system connected to the grid even considering the safety stability and economic exploitation, not only often help reduce only power plant, considering spinning reserve, hydroelectric power to bear not only the task of spinning reserve (hydro perform their task of spinning reserve less damage).
6. To run the programming
When the system then there are scattered power supply after the power system to improve system reliability and security, hoping to right the system output of photovoltaic power generation for remote programming. At present, China is Changwangfenkai the initial phase of the electricity market, only plants of large-scale electricity to participate in regional / provincial tendering market power, while scattered power from the local programming of grid electricity. VGP-BPS10 VGP-BPS10A VGP-BPS10A/B The electrical power distribution system as a whole consists of two parts: the province’s electricity grid and distributed food. The face of the variable price and the high number of scattered power, regional power grid to a variety of security constraints to meet the requirements of the most economical way of scheduling decentralized energy will be a concern.