I don't know where your comments come from, because the capacity of a single machine cannot be 8-10% of the total system capacity.
For example, the installed capacity of East China Power Grid reached 138.9 million KW in 2007, but the current largest unit is only 1 million KW, less than 1 %.
According to operating experience, excessive capacity of a single machine poses a greater risk to the safe operation of the system. Tripping a large unit can bring down the entire power grid. The capacity of a single machine must therefore be limited.
How to charge a hydroelectric plant when operating on an isolated network
1. It is suitable for stand-alone power plants whose total electricity production is slightly greater than or equal to that of the enterprise. electricity consumption. For example: a ferrosilicon factory has an autonomous power plantme with an installed capacity of 4*12 MW. The ferrosilicon plant has four 12,000 KVA electric melting furnaces or two 24,000 KVA electric melting furnaces. Using our company's technical equipment, it can achieve. stand-alone power plants and ferrosilicon plant operate on an isolated grid and do not need to be connected to the electrical system to operate.
2. Suitable for newly built stand-alone power plants. Due to state restrictions on small thermal power plants, it is difficult for power generation companies to connect to the grid, or the power system charges fees of up to 2 to 8 cents/kWh for use the company's need to connect to the network. energy production. After using our company's technology, when the company's internal energy consumption and electricity production matchBasically, the standalone power plant can realize isolated grid operation and can be self-sufficient without the need to connect to the grid. It can establish itself independently. electricity prices and reduce the high amount charged by the electricity department. Costs saved. Based on the experience of operating a 2*12 MW power plant in an isolated grid using our company's patented technology, it can save about 30 million yuan in electricity payment fees per year, bringing considerable benefits to your business.
3. Applicable to small captive thermal power plants that have been connected to the grid for electricity production. Due to rising coal prices and other reasons, the profit margins of corporate power generation are getting smaller and smaller. Thanks to our company's technology, it can be decoupled from thepower network, allowing the isolated network to operate stably and improve the economic benefits of the enterprise.
Why do power plants need to be connected to the grid?
The method of operating a hydroelectric power station on an isolated network with load is as follows:
1. First, several units operate in parallel to form a small network and are not connected to the network. the external grid.
2. Second, there is a standalone charging mode with a single unit providing power.
3. Finally, the grid-connected generator is decoupled from the external power grid and only operates with factory power after load shedding. This is a special case of a single machine with load.
3. p>Generator Only when connected to the grid can it produce electricity and transport it for use by thousands of homes. AtConversely, without a connection to the grid (also called decoupling), the generator cannot produce electricity, let alone transmit electrical energy.
Whether connected to the grid or decoupled, everything is done via the output switch of a generator. Connecting the generator to the grid involves connecting the generator to the grid (which can also be the case). considered The power grid is the connection of many users who need electricity so that the energy source can be transported continuously. There are three conditions for generators to be connected to the grid: the frequency, voltage and phase of the generator must be. consistent with the frequency, voltage and phase of power generation of the electrical network. (three conditions that are exactly the same are called synchrony; there is a slight deviation, but within the allowable range, this is called quasi-synchronous)