New energy stations have installed distributed cameras! The National Energy Administration issued the "Key Requirements for Preventing Safety Accidents in DC Transmission Systems"

Polaris Energy Storage Network learned that on January 5, the National Energy Administration issued the "Key Requirements for Preventing Safety Accidents in DC Transmission Systems". The document proposes that the support capacity of the DC-near new energy station should be improved by installing distributed cameras at new energy stations with insufficient short-circuit ratios in new energy stations to ensure that the short-circuit ratio of new energy stations on the low-voltage side of the new energy power generation unit should be 1.5 or above. Rationally arrange the operating modes of DC and new energy to prevent DC failure from causing new energy chains to break off the network.

For the flexible DC system access to new energy islands, power surplus solutions should be designed according to the system needs. Measures include but are not limited to configuring energy-consuming devices, control coordination and coordination strategies, stabilization and control devices, etc. to meet the system's fault crossing requirements.

New converter station AC and DC equipment and DC near-region new energy equipment should have a voltage withstand capacity of 1.3 times the maximum operating voltage to continuously operate for more than 500ms to prevent overvoltage tripping of related equipment during DC failure disturbance.

The new energy transmission system through the DC-near DC-area new energy units should ensure the stability of the grid connection of the DC-near-area new energy units, and conduct necessary tests such as hardware in-ring on the new energy units to ensure that the new energy units can operate safely and reliably under weak grid conditions (short-circuit ratio not greater than 1.5).

Notice of the National Energy Administration on Issuing the Key Requirements for Preventing Safety Accidents in DC Transmission Systems

Guoneng Comprehensive Communication Safety [2022] No. 115

All dispatched agencies, all relevant enterprise member units of the National Electric Power Safety Commission, and relevant power enterprises:

In order to conscientiously implement the major decisions and arrangements of the CPC Central Committee and the State Council on power safety risk control and further strengthen the safety management of DC transmission systems, on the basis of comprehensively sorting out and summarizing the experience of planning, construction, operation and accident lessons learned from DC project, the National Energy Administration has compiled and formed the "Key Requirements for Preventing Safety Accidents in DC Transmission Systems" (hereinafter referred to as the "Requirements"), which is now issued and will take effect from now on. At the same time, the following work requirements are put forward:

1. All power enterprises should attach great importance to the content of the "Requirements", focus on all aspects of DC near-region power grids, DC transmission lines, important equipment and personnel standardized management of converter stations, comprehensively strengthen the safety management of DC transmission systems, and effectively ensure that relevant requirements are effectively implemented in all aspects of the entire process of DC project planning and design, selection and manufacturing, infrastructure installation, testing and collection, operation and maintenance, etc.

2. All power enterprises should carry out publicity and training to ensure that relevant DC safety management entities within the enterprise are transmitted step by step, and do a good job in learning and training on the "Requirements".

3. During the implementation process, all power enterprises should promptly summarize and analyze, and continue to refine operation experience and accident lessons. If you have any relevant opinions and suggestions, please promptly feedback to the National Energy Administration (Electricity Safety Supervision Department).