Storage and storage said 3 response measures, let the air conditioning load "live" up!

Ningbo's electricity load in summer and winter presents the characteristics of "two peaks, two peaks and two periods", with the morning peak high and the evening peak long, the industrial and air conditioning accounts for a high proportion, and the difference between working days and weekends is obvious. Should not only guarantee the ningbo 9.544 million permanent residents living power, but also to help China make 2025 the first pilot city of booming development, but also service individual champions, specialization, new high-quality enterprise innovation revenue generation, such as "little giant" ningbo electric power supply company based on its "power follow orders," tap "unproductive" load, Applying digital means and effective mechanisms, the scientific management of air conditioning load is implemented to ensure that "kilowatt controllable, kilowatt adjustable", and the load regulation control is improved to micro and non-inductive.

Summer "life-saving artifact", was wrong to avoid peak "potential stock"?

This summer, Ningbo electricity load repeatedly hit a new high, the maximum load reached 18.063 million kW, in which the proportion of air conditioning load is more than a quarter, mainly including industrial air conditioning, commercial and public institutions air conditioning, residential air conditioning. Industrial air conditioning has less adjustable potential due to the needs of production environment; Residential air conditioning is the summer vacation children, the elderly at home "life-saving tool" need to be fully guaranteed; However, air conditioning in commercial and public institutions is the optimal target of peak regulation because of its large load capacity, good adjustability and small influence on economic and social development.

State Grid Ningbo Power Supply Co., Ltd. cooperated with Ningbo Energy Bureau, industry authorities and local governments to carry out on-site investigation and visit of electricity customers, and fully reached the goal of "unified air conditioning load management, helping the balance of power grid supply and demand, and serving the development of local economy" with the government. By the end of 2021, all the 11 district and county governments of the city issued the Notice on Carrying out the Construction of Flexible Monitoring of Air Conditioning Load, requiring the air conditioning load of public buildings to be included in the monitoring, and pushing the governments of commercial agglomeration areas to pilot the implementation plan of flexible regulation of air conditioning in public buildings to meet the kurtoid summer (winter).

In April this year, under the guidance of its power supply company in ningbo ningbo energy bureau, ningbo pilot development and was put into a public building central air conditioning monitoring platform, the differentiation strategy to achieve real-time monitoring, air conditioning load response custom, load transfinite warnings that multiple functions such as statistical analysis, power saving, real-time sharing platform of information and relevant government department.

At present, the air conditioning load data of 698 public building units in four categories such as Party and government organs, commercial complexes, hotels and office buildings in Ningbo area can be seen in real time, with the maximum monitoring load of 580,000 kW.

How to make each watt of air conditioning load "live"?

In order to make every public building participate in the air conditioning load regulation reasonably and effectively, and really make the air conditioning load "alive", State Grid Ningbo Power Supply Company innovatively explores three load response control methods, namely hierarchical response, classified response and time-sharing response.

Graded response

According to the different load gap of the whole city, it is graded from large to small to define the air conditioning load response mode. In the response stage, temperature setting and adjustment, partial shutdown, short-time total shutdown and other strategies are implemented in different levels from low to high, and supervised by the competent department of the industry to ensure the execution efficiency.

Classification of the response

Is combined with public buildings users involved in regulating willingness and ability, can be adjusted according to the party and government organs to take the lead, the principle of active thermal control, motor load guaranteed, could be divided into motor response type variable load (short shut user), administrative interference load accept administrative instruction (user), temperature control load (not shut down the user) three categories, classification of response strategy, Make sure the response is effective.

Time response

Load characteristic is unit adjustment according to the area and the air conditioning load ratio difference, morning, noon, at night, combined with the air conditioning load adjustment ability and effect in the different periods, differentiation, personalized choice time-sharing regulating mode, implement early peak latency boot and late peak power off in advance, the rest of the time temperature control is given priority to, close combination of a variety of ways, such as meet the demand of regulation in the different periods.

Power supply companies at all levels and local governments formulate relevant management measures according to local conditions, one household one policy. By the end of June, the governments of Ningbo Haishu, Yinzhou, Jiangbei and other commercial cluster areas have successively introduced the implementation plan of flexible air conditioning load adjustment for public buildings to meet the peak summer (winter), and strengthened the policy guidance.

"The air conditioning load unit in charge of 698 public buildings to carry out the centralized monitoring, implementation of short-time shut down, adjust the cold water temperature, outlet air temperature differential control measures, such as improving can greatly relieve the tense situation of peak phase power supply and demand of industrial load stress, let the electricity to the people, to help bail out companies, ensuring smooth and orderly development of regional economy. At the same time, by guiding users to use off-peak electricity and save energy during the peak period, we will create a good atmosphere for electricity consumption, raise the awareness of electricity saving in the whole industry, and help the whole society to save energy and reduce carbon." Chen Zhengdong, Ningbo Energy Bureau, said in an interview.

Take the initiative to participate in the accurate adjustment of air conditioning, and realize the user experience of "no sense"

Haishu District is located in the center of Ningbo, where there are Nanyuan Hotel, the first five-star hotel in Zhejiang Province, Tianyi Square, Ningbo City living room, Ningbo "Champs-Elysees" Heyi Avenue, "the First Street in East Zhejiang" Zhongshan Road Commercial Characteristic Street, etc. As a central commercial and business district, large commercial complexes account for a high proportion, and the commercial load accounts for about 33% of the total social load in the district, among which the air conditioning load accounts for about 55% of the commercial load.

From July 12 to July 16, and from August 3 to August 26, 133 public building units in Haishu District participated in the flexible adjustment of air conditioning loads, with an average daily adjusted load of about 0.8 million kilowatts and a maximum adjusted load of nearly 20,000 kilowatts, making full use of each kilowatt of electricity.

At 16:38 on July 11, Wang Bo, manager of the property Department of Ningbo Tianyi International Shopping Center Project, received a notification message, "Time: 14:00 on July 12-15:00 on July 12, please cooperate with the voltage drop air conditioning load of 300 KW". Not a few minutes later, he received a phone call from Haishu Tianyi power supply office, confirming the work.

At 13:50 the next day, Wang Bo and the electrician went to the roof of the shopping mall to adjust the water outlet temperature of the supporting control cabinet of the centrifugal water cooling unit and shut down part of the air conditioning equipment. Here are five sets of supporting control cabinets for centrifugal water cooling units, which are used to control the main cooling equipment in the shopping mall -- five sets of high power air conditioners with a total of 1800 kW. According to Wang Bo, at the beginning of May, the power supply staff installed intelligent electricity acquisition terminal and intelligent gateway in the air-conditioning load loop in the distribution room of the shopping mall, which can support 1-5 minutes of data acquisition at different frequencies to ensure real-time data collection of air-conditioning load.

At 14:30, Jiang Zhiming, a power supply employee, saw through the monitoring platform that the air conditioning load of Tianyi International Shopping Center dropped from 1,568 kilowatts to 1,275 kilowatts, and the power load of 293 kilowatts was reduced in just half an hour.

"During peak power consumption, shutting off unnecessary regional air conditioners or properly adjusting the temperature of air conditioners will have little impact on the overall operation of the mall and the sensory perception of customers," Wang said. "It is also a response to the call for scientific and energy-saving electricity use."

On October 11th, Ningbo Energy Bureau officially approved the establishment of Ningbo Energy Big Data Management Center (Power Load Management Center). Next, its ningbo electric power supply company will be fully deeply touch may take part in the equipment of the load adjusting, refine non-inductive, micro sense, inductive, strong sense of the load list, end side electricity awareness and strengthening load regulation ability construction, strengthen coordination with government departments, fully awakened all kinds of resources of load adjusting, to fully prepare for the winter electricity peaks for, We will continue to promote clean energy supply and efficient consumption.

General emergency measures to deal with power outages will use commercial energy storage, modular outdoor energy storage system, as the name suggests, is an energy storage system installed outdoors. Storage electric storage devices are unique in that their modular design allows additional storage capacity to be added or removed, enabling the system to be fine-tuned to store more energy than a fixed-capacity battery system can hold to meet the storage needs of more consumers. These are customized once the system is purchased, but can be upgraded later as requirements change.

Source: Zhejiang electric e home