654175-2

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Grid interconnectors are a form of electrical transmission infrastructure used to transfer power between different parts of the grid. Grid interconnectors are a key component of an integrated and interconnected power grid and play a critical role in increasing power supply reliability, allowing electricity from one region to easily and quickly cross long distances in order to back up any area affected by outages. Grid interconnectors can also be used to maximize efficiency by matching electricity generation resources to loads across different regions. Grid interconnectors provide an affordable and reliable means of increasing power infrastructure capacity, providing a key factor in ensuring the security and reliability of power delivery to consumers.

In particular, 654175-2 is an application field and working principle for grid interconnectors. This standard specifies the general requirements, technical characteristics, connections, and on-site installation conditions for the electrical connection of two separate electrical systems in the same substation. It has recently been adapted and made applicable to small interconnections between grids operating at the same frequency, such as those of several households in the same residential area.

The 654175-2 principle of durable, reliable, and efficient electrical connection is based on the concept of interconnection via a transformer-coupled link. By connecting two grids together, power can be shared in both directions. The transformer link is composed of two parts, the transformer itself and the cable links. The transformer and its cables form what is referred to as the "interface unit" and are designed to facilitate a secure connection between the two grids. The transformer couples two grids on different voltage levels, thus enabling power to flow between them without creating a short circuit.

This principle can also be applied to connect different types of grids that operate on different frequencies. The basic concept consists of selecting a transformer with a higher rating than the highest voltage that will be seen between the two grids, and the current transformer link then provides overload protection for both grids. This connection is maintained even if the frequency of one of the grids is changed, since the transformer will adjust its frequency to match that of the other.

The 654175-2 standard defines a number of safeguards to ensure that the connection between grids is secure and efficient. For example, all connections must be considered independently and the connection must be approved by both grids. The transformer link must be installed in closed environments and the environment must be regularly monitored and kept clean. There must also be a voltage rating for the electrical connection, a minimum interconnection impedance, a maximum voltage drop, and a maximum voltage difference.

This principle also extends to include a method of controlling the flow of electricity between grids. The 654175-2 standard requires that the power factor control arrangement used for two grids must be specified in the documentation. Power factor control is important to ensure the distribution of power in a stable manner. The 654175-2 standard also defines a range of control measures to be taken in the event of a failure in one of the grids, such as a sudden change of frequency, a short circuit, or an unbalanced load.

In conclusion, the 654175-2 standard offers a secure and efficient method of power transfer between grids. This method of connection ensures that any grid connection is safe and contains the necessary safeguards to protect both grids from potential disruptions. Furthermore, the 654175-2 standard provides the flexibility to connect different types of grids and allows power to be shared in both directions.

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