Rejuvenate the old city with "embroidery kung fu".
-- The reliability of Guangzhou's power supply is on par with the international advanced level
In the past, when the power supply personnel came to the community for maintenance, there must be a power outage, but now that they come to work, the electricity in the community is still in normal use. Attentive citizens will find that there are fewer and fewer "power outages and maintenance" in the community today. Behind this change is the persistence of China Southern Power Grid Guangdong Guangzhou Power Supply Bureau for decades, providing solid energy support for Guangzhou's high-quality development with safe, reliable and high-quality power supply.
The people's city is built by the people, and the people's city is for the people. In recent years, Guangzhou Power Supply Bureau has built 12 world-leading high-reliability demonstration zones. In 2022, the reliability rate of power supply in Yuexiu and Liwan will reach 99999%, the reliability of power supply is comparable to the international advanced level.
Innovate the "self-healing network" to continue the "life electricity".
In September 2023, China's first "kapok-type" medium and low voltage collaborative self-healing distribution network was officially put into operation in Yuexiu High Reliability Demonstration Zone, marking a big step forward for Guangzhou Yuexiu towards the goal of no power outage in the whole region.
It is understood that Yuexiu District has a high load density and many important users, and once a failure occurs, power outages will lead to serious consequences. "The distribution network can be divided into medium voltage power grid and low voltage power grid according to the voltage level. Last year, we completed the automation transformation of the medium-voltage power grid in Yuexiu District, so that the medium-voltage power grid has the self-healing ability to automatically judge faults, isolate faults, and transfer power supply and restore power, which we call 'grid self-healing'. Xu Ying, deputy head of the relay automation communication class of the power distribution department of Guangzhou Yuexiu Power Supply Bureau, said.
But the original "grid self-healing" was not perfect. In some extreme scenarios, if the equipment fails, there will be "blind spots" and "dead spots" where the power supply of some residents cannot be restored. As a result, the Guangzhou Power Supply Bureau piloted the upgrading of the low-voltage power grid in Yuexiu District to provide residents with dual power supply. This innovation has enabled the medium-voltage power grid and the low-voltage power grid to work together to "self-heal", and the power supply recovery rate has reached 100%.
Guangzhou Power Supply Bureau will this new power grid structure vividly called "kapok", residents are "petals", low-voltage power grid is "vein", medium-voltage power grid constitutes "receptacle", power from the medium-voltage power grid through the low-voltage power grid to thousands of households, just like nutrients from the "receptacle" through the "vein" continuous delivery to the "petals", only the "receptacle" and "vein" of the strong and unimpeded, there are "petals" of the splendid color, there are thousands of lights. According to reports, the first "kapok type" medium and low voltage collaborative self-healing distribution network in China has created the country's first "3 100%" high-quality power supply demonstration sample, realizing 100% zero load loss, 100% zero use of power generation vehicles, and 100% zero perception of power outage under any equipment failure or maintenance of 10 thousand volt medium voltage, becoming one of the models of Guangzhou Power Supply Bureau to build a modern urban distribution network.
The government and enterprises jointly promote the upgrading of the power grid in the old city
The reliability of Guangzhou's power supply is not only backed by the "kapok-type" self-healing distribution network, but also supported by the fine transformation of "embroidery kung fu", especially in the historic old city of Liwan, the Guangzhou Power Supply Bureau has explored a new model to promote the transformation and upgrading of the power grid in the historical and cultural districts, providing reliable power for the old city to rejuvenate itself.
Liwan District is the area with the highest concentration of historical and cultural resources in Guangzhou, but due to the narrow streets and alleys of the historical and cultural district itself, the dense buildings, and the serious lack of space for the construction of transformers and other power facilities, which restricts the transformation and upgrading of the cultural district. In recent years, the Liwan Power Supply Bureau has focused on improving the quality of power supply services and ensuring power supply, and has jointly promoted the transformation and upgrading of power grids in historical and cultural districts, striving to comprehensively improve the safety, reliability and intelligence of power grid facilities without affecting the historical features, and strive to build a digital high-quality power supply demonstration area.
In order to eliminate the potential safety hazards of overhead lines and outdoor benches in the old urban area, the Liwan Power Supply Bureau has coordinated the low-voltage overhead lines and partially lowered them to the ground in cooperation with the revitalization and renovation project of the historical and cultural blocks, and the three-year action plan is about 80 kilometers long. Up to now, the Liwan Power Supply Bureau has completed the first contract in Fengqing and the 4th section of ChanghuayongThe upgrading of 5 kilometers of low-voltage overhead lines not only greatly reduces the potential safety hazards of power facilities, but also improves the aesthetics and sense of history of the historical and cultural districts.
In addition, the Liwan Power Supply Bureau combined with the historical and cultural block renovation project to create a "new model of government-enterprise linkage", and cooperated with the first department to investigate and implement the public housing and land resources in the block, laying the foundation for the renovation of outdoor power supply facilities. At present, the Liwan Power Supply Bureau and Lingnan Street and Longjin Street have successfully negotiated the first batch of three public houses for the renovation of power distribution rooms, and took the lead in opening up the cooperation channel for the integration and utilization of public housing resources at the level of Guangzhou Bureau, solving the problem of serious shortage of electricity housing land in historical and cultural blocks, and also opening up a new path of "Liwan experience" for future power grid construction.
There is no such thing as the best power supply reliability, only better. During the "14th Five-Year Plan" period, it is planned to put into operation 94 new substations of 110 thousand volts and above in Guangzhou, promoting the overall power supply capacity from the current 23 million kilowatts to 32 million kilowatts. In the next step, Guangzhou Power Supply Bureau will continue to improve the level of grid, equipment, system, service and basic management, with the goal of taking the lead in building a world-class urban power grid enterprise in an all-round way, strive to create a national leading benchmark power supply bureau, and actively serve Guangzhou to realize the new vitality of the old city and the four new brilliance.