The hottest way to explore the realization of smar

2022-08-11
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Explore the realization path of smart electricity editor's note: rising fuel costs, aging infrastructure and insufficient investment, as well as changes in the economic situation, all these factors make the current power industry in a chaotic period. Unfortunately, the expansion of power generation is increasingly expensive, and the public is increasingly opposed to the construction of new fossil fuel power plants, especially coal-fired power plants. In addition, as utility companies prepare to meet rising user demand, greenhouse gas emissions from power generation may soon exceed emissions from all other energy sources. Fortunately, the creation of smart electricity will solve all the above problems

most power systems in the world are built when the price of major energy is relatively inexpensive. The main way to ensure electrical reliability is to always maintain excess power in the system, in which power flows from the central power plant to consumers in one direction. The purpose of investment in the power system should be to meet the growing demand, rather than fundamentally change the way the system operates

although innovation and technology have brought significant changes to other industrial fields, most of the power system still maintains the operation mode of decades. The lack of funds and the asset service life of 40 years or even longer make the system increasingly inefficient and unstable. In addition, climate change, soaring fuel costs, outdated electricity infrastructure, and new power generation technologies have changed the views of all stakeholders. In particular, the following changes require a new and more intelligent system to manage the increasingly complex electricity

power generation generates about 25% of global greenhouse gas emissions, and utility companies are also rethinking the future direction of the power system

renewable and distributed power generation will play a more important role in reducing greenhouse gas emissions

demand side management will improve energy efficiency and reduce total power consumption

real time monitoring of electrical performance will improve the reliability and utilization of electricity, reduce lighting, and optimize the return on investment of electricity

the main application of smart electricity

makes the power system "intelligent"

aware of these problems, energy enterprises began to integrate information and communication technology (ICT) into the power infrastructure to make the power system "intelligent". Near real-time information enables utility companies to manage the entire power system as an integrated framework, and proactively detect and respond to changes in power demand, supply, cost, quality, and greenhouse gas emissions in various regions and equipment. Similarly, better information enables consumers to manage energy use and meet their needs. Just like al 8226, the former vice president of the United States; Gore said, "just as the introduction of the Internet triggered the emergence of a powerful information economy, the development of power networks or smart electricity will promote the birth of a dynamic, new, renewable energy economy."

the potential environmental and economic advantages of smart electricity cannot be ignored. Northwest Pacific National Laboratory recently conducted an investigation on the use of smart electricity technology to monitor and adjust household energy consumption. The results show that the annual electricity bill of household users has been reduced by an average of 10%. If the scheme is widely deployed, it can reduce the peak load of public power by 15% every year, which is equivalent to more than 100000gw of electricity. In order to obtain these electricity, 100 large-scale coal-fired power plants need to be built in the United States in the next 20 years. This will save $200billion in investment in new power plants and electricity, equivalent to reducing 30million road vehicles

by continuously monitoring power consumption and actively managing equipment energy consumption, demand side management can effectively reduce power consumption in homes, offices and factories

a power system supported by excellent technology will be more efficient, which can not only reduce greenhouse gas emissions, but also improve power reliability. Specifically, smart electricity can reduce peak power consumption by automatically shutting down designated equipment in homes, offices and factories; It can provide instant feedback on energy consumption and reduce waste; It can also encourage manufacturers to produce "smart" devices and reduce energy use; At the same time, it can also isolate the interference factors in electricity, detect and prevent power lighting

intelligent electric platform: it supports core electric automation

connecting all relevant nodes in electricity is very important for collecting electric state information. In the past, only high-voltage and some medium voltage information was collected, but now it is becoming increasingly important to comprehensively check the electrical state. Managers can find the power loss in all regions and better manage renewable energy. They can usually supply power to areas that have not been monitored before. 3. After the equipment passes the final acceptance at the user's site, it will enter the free warranty period. The efficiency of management system is becoming more and more complex, which also requires the integration of decentralized decision-making mechanism, that is, intelligent integration into power, so as to realize the optimization of power management and greatly reduce the phenomenon of power failure

power monitoring and management: use the collected information

if correct measures are taken to quickly isolate problems, costly power outages can be avoided. Utility companies are installing sensors to monitor electricity in near real time (second to millisecond delay) to detect faults as soon as possible. These monitoring systems will be extended from the initial transmission to the distribution. Electric performance information is integrated into the SCADA system of utility companies to provide automatic and near real-time electric power control capability

smart electricity encourages households and building owners to invest in small-scale low-carbon power generation technologies with high efficiency and low emissions to meet part of their power supply needs and peak demand for electricity, thereby reducing the need for large-scale new power plants

integrated maintenance: extend the life cycle of assets

in the medium and long term, collecting information can optimize the maintenance strategy of electric assets. Due to different service life, service life and many other factors, the asset status may vary greatly. The traditional fixed periodic maintenance strategy is no longer applicable. Managers can continuously monitor assets, and key problems can be found in advance. With the help of new communication technology, on-site technicians can obtain the status information of key assets to ensure that problems are solved in time. This new maintenance method can significantly extend the service life of assets and avoid costly interruptions

intelligent measurement: real time energy consumption monitoring

due to the influence of supply and demand relations such as output, fuel price, climatic conditions and demand fluctuations, the electricity price in today's wholesale market is volatile. Generally speaking, the price of off peak electricity at night is 50% lower than that during the day. However, consumers usually only see a stable price that has nothing to do with the time cycle. At the request of energy regulators, some utility companies began to replace traditional mechanical meters with "smart meters", so that customers can choose variable prices according to the time period of the day. By letting customers see the actual cost of energy they consume at any time, they can adjust accordingly, shut down some equipment, and switch energy consumption from high price periods to low price periods. This peak load shifting and power rationing mechanism can simultaneously reduce consumer costs and peak consumer demand for utility companies

demand side management: reduce the power consumption of homes, offices and factories

by continuously monitoring the power consumption and actively managing the energy consumption of equipment, demand side management can effectively reduce the power consumption of homes, offices and factories. The contents of management include demand response plan, smart meters and variable electricity prices, smart buildings equipped with smart devices, and energy dashboard. These innovations are combined to enable utilities and consumers to more effectively manage and respond to changes in electricity demand

demand response: the so-called demand response refers to that during the peak period of energy use, utility companies send electronic messages to consumers to remind them to turn off non essential equipment (or reduce their power consumption) to reduce energy consumption. In the future, the reminder information will be automatically sent to the device without human operation. If enough consumers adopt this scheme, utility companies will not have to build additional power plants, and the new power plants are the highest fixed asset costs for them. In order to promote consumers to implement this strategy, utility companies can adopt cash payment or reduce consumers' electricity payment and other means

Figure 4 Cisco ibsg's analysis of the German market shows that smart electricity is the cheapest way to increase power generation, and it is also the most environmentally friendly choice

intelligent buildings equipped with intelligent devices: in terms of reducing energy use, buildings are becoming intelligent. Independent and complex traditional systems that manage various equipment (such as heating, ventilation, air conditioning, lighting) are currently being integrated into a common IT infrastructure, so that these equipment can "communicate" with each other to coordinate activities and reduce waste. For example, by ensuring that heating equipment and air conditioning will not operate at the same time, an administrator managing 500 commercial buildings can easily reduce energy consumption by nearly 20%

energy dashboard: if consumers see the greenhouse gas emissions produced by themselves, they will reduce energy use and greenhouse gas emissions. The energy dashboard realizes the real-time visibility of personal energy consumption and provides suggestions on how to reduce energy consumption. A recent University survey shows that a simple dashboard can promote households to reduce the energy use of buildings by 30%

integrated renewable energy: encourage households and enterprises to install their own renewable energy

small-scale low-carbon power generation: in some households and offices, using small-scale power generation equipment for local power supply, that is, small-scale low-carbon power generation will be more cost-effective. These equipment include renewable energy equipment such as photoelectric and solar energy equipment, as well as non renewable equipment, such as fuel oil or gas-fired generators with heat recovery function

for household, commercial and industrial customers, the price of small-scale low-carbon power generation technology is becoming cheaper. Due to the differences in technology type and operating environment (location, utilization rate, government or state subsidies, and then make corresponding solutions according to different reasons), they are more competitive than traditional power generation and can reduce greenhouse gas emissions. However, the large-scale promotion of these technologies still needs public support and further technology research and development. The combination of small-scale low-carbon power generation technology and smart electricity will help consumers become "an active part of electricity", rather than being out of the picture and integrated with central power generation, rather than replacing it. In addition, smart power will allow utility companies to integrate distributed generation assets into their systems as "virtual power plants"

Cisco ibsg's analysis of the potential financial impact of its direct commitment to the development and utilization of new materials on utility companies shows that forward-looking strategies can greatly improve profits. While lower wholesale prices have cut power generation profits, there are a lot of opportunities in the retail sector. Some of these opportunities come from the transformation of the legal system required by the market and the business model of public utility companies. In the field of smart electricity, utility companies will benefit from energy efficiency rather than energy consumption

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