Power system monitoring intelligent trend is stronger

According to the National 12th Five-Year Plan for Smart Grid, in the future, the focus of the smart grid construction will be on the highly integrated modern advanced technologies, comprehensively improve the intelligent control level of large-scale power grid operation, and the ability and level of power supply services. In this way, China's power grid will eventually achieve a leap-forward development. In terms of equipment investment, in addition to the primary equipment consisting mainly of UHV, the smart grid construction will be fully transferred to the six major aspects of grid intelligence: power generation, intelligent power transmission, intelligent substations, smart distribution networks, intelligent power consumption and intelligence. Scheduling. According to statistics, by 2020, including the grid access, flexible transmission, power grid monitoring, intelligent substations, smart meters, charging stations / piles and other equipment, the market capacity of the equipment brought by the smart grid will exceed 620 billion yuan.

Concretely in the construction of each link, it means that the power generation must pass the device, the intelligentization of the power grid, or the large-capacity power grid energy storage to increase the power generation access of new energy sources, especially clean energy; the smart power transmission technology should be applied to flexible power transmission technology. Improve transmission flexibility, transmission efficiency, and transmission capacity of the transmission system; intelligent substations should adopt advanced, reliable, integrated, and environmentally-friendly smart devices to realize digitalization of the entire station, networking of communication platforms, and standardization of information sharing; Complete the system of distribution automation and distribution network regulation integration and intelligent technology support to achieve flexible access and safe operation of the micro-grid; intelligent power and scheduling is to intelligently control and dominate the power through the interaction and processing of information. To achieve the scientific management of electrical energy.

Around these goals, equipment manufacturers in many industries, such as power electronics, new energy development, and security monitoring, are closely following the progress of the national smart grid, and gradually develop suitable new products in accordance with the requirements of the domestic smart grid, and strive to integrate electricity. The actual application requirements of the system, with innovative products provide powerful technical support for the smart grid construction blueprint.

With rising demand for new energy power generation, smart grid-connected challenges intensify the construction of smart grids and require the participation of clean energy to achieve the goal of optimizing the energy structure. Among the three main types of new energy sources, nuclear power, wind power, and photovoltaic power generation, solar energy is a kind of energy source that is widely existent, stable and reliable, and basically free of pollution. It will occupy a large amount in future smart grid power acquisition methods. The proportion of. Relevant information shows that by 2020, the total demand for new energy power generation access equipment represented by wind power and photovoltaics will exceed RMB100 billion, of which, due to the high-speed growth of wind power, the market growth of photovoltaic inverters will increase. For rapidity, the average annual growth rate is about 50%, and the market demand is up to RMB 60.5 billion.

Clean and renewable energy grids must be completely redesigned and transformed into smart grids. Smart access to new energy will also be an important issue. Large-scale wind power and photovoltaics are currently The state of electrical power does not solve the problem of smart access. In a sense, smart grids only achieve some functions. Therefore, the future development of this area deserves attention and expectation, and it is also a difficulty that some manufacturers are trying to overcome. As one of the important suppliers of inverters for large power station projects such as Golmud in Qinghai, the MW-level photovoltaic grid-connected inverter developed by Shanyi New Energy Co., Ltd., in addition to supporting active and reactive power control, also has low-voltage grid connection. Under the anti-islanding capability and the low-voltage ride-through capability in the case of high-voltage and high-voltage grid connection, it can accept long-range smart grid dispatch, and has passed strict network access certification for 18 countries including Germany. Dr. Chen Xiaogao, the product manager of the company, believes: “The construction of smart grids will allow a variety of power generation methods to be formed organically and make up for their respective deficiencies to obtain the optimal power supply mode for the power grid.”

However, as far as the current situation of the photovoltaic industry is concerned, there are still many problems to be solved in the overall planning. For example, in China, the current large-scale photovoltaic power generation areas are basically located in high-altitude, long-day sunshine areas in the west, and the generated electricity cannot be locally digested and needs long-distance transportation. This requires high-voltage transmission. Network, power transmission is a relatively large issue of economic construction. In addition, if a solar power project is built in a coastal area where power demand is relatively strong, it may affect the direct sunlight due to abundant rainwater and a relatively polluted environment, and no good power generation efficiency can be obtained. It is to be considered.

It is worth noting that as the market matures, solar inverter products with new features are also constantly evolving. Chen Xiaogao said: "The development of inverters depends on the needs of the market. During the construction of smart grids, new types of inverters will be born, for example, in order to avoid the peak of electricity consumption and use electricity more effectively. A smart energy storage type bidirectional inverter that can generate electricity during the day and store energy at night is a very good product type, which will also promote the development of energy storage products."

Power system monitoring: integration, platformization, and intelligentization are trending. Each smart substation is a “strong node” in the smart grid and needs to automatically complete basic functions such as information collection, measurement, control, protection, measurement, and monitoring. Can support the power grid to complete advanced functions such as real-time automatic control, intelligent adjustment, online analysis and decision making, and cooperative interaction. According to relevant surveys, by 2020, more than 6,000 substations with more than 110kv will be added nationwide, and all key substations will be intelligently transformed. It is expected to bring in more than 150 billion yuan in market demand, among which electronic transformers and monitoring Demand for equipment such as protection and automation systems will account for a significant proportion.

Taking the power system monitoring solution as an example, different grid companies have different priorities in their construction. Nanjing Nanzi Information Technology Co., Ltd. is a wholly-owned subsidiary of Guodian Nanjing Automation Co., Ltd. and Chen Feiling, deputy general manager of the company, introduced: “The State Grid Corporation of China mainly promotes the integrated monitoring of traditional substation image monitoring systems and smart substation auxiliary systems. Platform; China Southern Power Grid Corporation mainly promotes the use of substation video and environmental monitoring systems, and their main features are that the monitoring center implements remote real-time video monitoring, remote faults, and accidental alarm receiving processing on its substations through the existing power communication network. Improve the safety and reliability of substation operation and maintenance, and gradually realize visual monitoring and scheduling of the power grid, so that the power grid can be operated more safely and reliably.

The new power system monitoring and control solution requires standardization to solve the problem that different manufacturers' equipment meets the needs of the power industry's application environment and interoperability; realize multi-level networking between substations and county power supply companies-city power supply companies-provincial companies; and integrated automation System linkage to achieve remote control, remote linkage, provide remote reference; in addition to complete video surveillance, but also to achieve environmental monitoring, air conditioning control, fan control, perimeter prevention, and access control, fire protection system linkage and other functions. “For a period of time in the future, we will also need to strengthen our understanding of and standards for the IEC 61850 smart substation standard, and be closer to the practical needs of users in the power industry to develop products.” Chen Feiling said, “On the one hand, we must strengthen the interconnection and interoperability of the systems. Compatible, protocol signalling consistency; on the other hand, it is also required to meet the high requirements of electromagnetic interference of transformer substations on equipment electromagnetic compatibility performance and enclosure protection level, and to increase the cost-effectiveness and practicality of the system in order to meet user safety production and auxiliary monitoring. Need."

Feng Weibin, director of solution of Zhejiang Dahua System Engineering Co., Ltd., also said: “In the current construction of substations, the requirements for power monitoring systems tend to be integrated, platformized, and intelligent. On the one hand, integration refers to the integration of multiple systems. The problem of islands of information in different monitoring systems, on the other hand, refers to the joint control of the monitoring system and the primary equipment and the communication with the secondary equipment to realize the interaction and complementation of the system, and with the implementation of the substation “unattended”, the power system is monitored. Gradually networked and platformized, through this platform, the entire city-level power grid and provincial-level power grid can be cascaded to achieve true integration and unified management, while intelligence is mainly reflected in the system's demand for video intelligence analysis technology. Through this intelligent technology, the system can automatically identify and 'think' to ensure the stable operation of the substation."

According to the National 12th Five-Year Plan for Smart Grid, in the future, the focus of the smart grid construction will be on the highly integrated modern advanced technologies, comprehensively improve the intelligent control level of large-scale power grid operation, and the ability and level of power supply services. In this way, China's power grid will eventually achieve a leap-forward development. In terms of equipment investment, in addition to the primary equipment consisting mainly of UHV, the smart grid construction will be fully transferred to the six major aspects of grid intelligence: power generation, intelligent power transmission, intelligent substations, smart distribution networks, intelligent power consumption and intelligence. Scheduling. According to statistics, by 2020, including the grid access, flexible transmission, power grid monitoring, intelligent substations, smart meters, charging stations / piles and other equipment, the market capacity of the equipment brought by the smart grid will exceed 620 billion yuan.

Concretely in the construction of each link, it means that the power generation must pass the device, the intelligentization of the power grid, or the large-capacity power grid energy storage to increase the power generation access of new energy sources, especially clean energy; the smart power transmission technology should be applied to flexible power transmission technology. Improve transmission flexibility, transmission efficiency, and transmission capacity of the transmission system; intelligent substations should adopt advanced, reliable, integrated, and environmentally-friendly smart devices to realize digitalization of the entire station, networking of communication platforms, and standardization of information sharing; Complete the system of distribution automation and distribution network regulation integration and intelligent technology support to achieve flexible access and safe operation of the micro-grid; intelligent power and scheduling is to intelligently control and dominate the power through the interaction and processing of information. To achieve the scientific management of electrical energy.

Around these goals, equipment manufacturers in many industries, such as power electronics, new energy development, and security monitoring, are closely following the progress of the national smart grid, and gradually develop suitable new products in accordance with the requirements of the domestic smart grid, and strive to integrate electricity. The actual application requirements of the system, with innovative products provide powerful technical support for the smart grid construction blueprint.

With rising demand for new energy power generation, smart grid-connected challenges intensify the construction of smart grids and require the participation of clean energy to achieve the goal of optimizing the energy structure. Among the three main types of new energy sources, nuclear power, wind power, and photovoltaic power generation, solar energy is a kind of energy source that is widely existent, stable and reliable, and basically free of pollution. It will occupy a large amount in future smart grid power acquisition methods. The proportion of. Relevant information shows that by 2020, the total demand for new energy power generation access equipment represented by wind power and photovoltaics is expected to exceed 100 billion yuan, of which, due to the high-speed growth of wind power, the market growth of photovoltaic inverters will increase. For rapidity, the average annual growth rate is about 50%, and the market demand is up to RMB 60.5 billion.

Clean and renewable energy grids must be completely redesigned and transformed into smart grids. Smart access to new energy will also be an important issue. Large-scale wind power and photovoltaics are currently The state of electrical power does not solve the problem of smart access. In a sense, smart grids only achieve some functions. Therefore, the future development of this area deserves attention and expectation, and it is also a difficult situation that some manufacturers are trying hard to overcome. As one of the important suppliers of inverters for large power station projects such as Golmud in Qinghai, the MW-level photovoltaic grid-connected inverter developed by Shanyi New Energy Co., Ltd., in addition to supporting active and reactive power control, also has low-voltage grid connection. Under the anti-islanding capability and the low-voltage ride-through capability in the case of high-voltage and high-voltage grid connection, it can accept long-range smart grid dispatch, and has passed strict network access certification for 18 countries including Germany. Dr. Chen Xiaogao, the product manager of the company, believes: “The construction of smart grids will allow a variety of power generation methods to be formed organically and make up for their respective deficiencies to obtain the optimal power supply mode for the power grid.”

However, as far as the current situation of the photovoltaic industry is concerned, there are still many problems to be solved in the overall planning. For example, in China, the current large-scale photovoltaic power generation areas are basically located in high-altitude, long-day sunshine areas in the west, and the generated electricity cannot be locally digested and needs long-distance transportation. This requires high-voltage transmission. Network, power transmission is a relatively large issue of economic construction. In addition, if a solar power project is built in a coastal area where power demand is relatively strong, it may affect the direct sunlight due to abundant rainwater and a relatively polluted environment, and no good power generation efficiency can be obtained. It is to be considered.

It is worth noting that as the market matures, solar inverter products with new features are also constantly evolving. Chen Xiaogao said: "The development of inverters depends on the needs of the market. In the process of building a smart grid, new types of inverters will be born, for example, in order to avoid the peak of electricity consumption, and to use electricity more effectively. A smart energy storage type bidirectional inverter that can generate electricity during the day and store energy at night is a very good product type, which will also promote the development of energy storage products."

Power system monitoring: integration, platformization, and intelligentization are trending. Each smart substation is a “strong node” in the smart grid and needs to automatically complete basic functions such as information collection, measurement, control, protection, measurement, and monitoring. Can support the power grid to complete advanced functions such as real-time automatic control, intelligent adjustment, online analysis and decision making, and cooperative interaction. According to relevant surveys, by 2020, more than 6,000 substations with more than 110kv will be added nationwide, and all key substations will be intelligently transformed. It is expected to bring in more than 150 billion yuan in market demand, among which electronic transformers and monitoring Demand for equipment such as protection and automation systems will account for a significant proportion.

Taking the power system monitoring solution as an example, different grid companies have different priorities in their construction. Nanjing Nanzi Information Technology Co., Ltd. is a wholly-owned subsidiary of Guodian Nanjing Automation Co., Ltd. and Chen Feiling, deputy general manager of the company, introduced: “The State Grid Corporation of China mainly promotes the integrated monitoring of traditional substation image monitoring systems and smart substation auxiliary systems. Platform; China Southern Power Grid Corporation mainly promotes the use of substation video and environmental monitoring systems, and their main features are that the monitoring center implements remote real-time video monitoring, remote faults, and accidental alarm receiving processing on its substations through the existing power communication network. Improve the safety and reliability of substation operation and maintenance, and gradually realize visual monitoring and scheduling of the power grid, so that the power grid can be operated more safely and reliably.

The new power system monitoring and control solution requires standardization to solve the problem that different manufacturers' equipment meets the needs of the power industry's application environment and interoperability; realize multi-level networking between substations and county power supply companies-city power supply companies-provincial companies; and integrated automation System linkage to achieve remote control, remote linkage, providing a remote reference; in addition to the completion of video surveillance functions, but also to achieve environmental monitoring, air conditioning control, fan control, perimeter prevention, and access control, fire protection system linkage and other functions. “For a period of time in the future, we will also need to strengthen our understanding of and standards for the IEC 61850 smart substation standard, and be closer to the practical needs of users in the power industry to develop products.” Chen Feiling said, “On the one hand, we must strengthen the interconnection and interoperability of the systems. Compatible, protocol signalling consistency; on the other hand, it is also required to meet the high requirements of electromagnetic interference of transformer substations on equipment electromagnetic compatibility performance and enclosure protection level, and to increase the cost-effectiveness and practicality of the system in order to meet user safety production and auxiliary monitoring. Need."

Feng Weibin, director of solution of Zhejiang Dahua System Engineering Co., Ltd., also said: “In the current construction of substations, the requirements for power monitoring systems tend to be integrated, platformized, and intelligent. On the one hand, integration refers to the integration of multiple systems. The problem of islands of information in different monitoring systems, on the other hand, refers to the joint control of the monitoring system and the primary equipment and the communication with the secondary equipment to realize the interaction and complementation of the system, and with the implementation of the substation “unattended”, the power system is monitored. Gradually networked and platformized, through this platform, the entire city-level power grid and provincial-level power grid can be cascaded to achieve true integration and unified management, while intelligence is mainly reflected in the system's demand for video intelligence analysis technology. Through this intelligent technology, the system can automatically identify and 'think' to ensure the stable operation of the substation."

Among them, video intelligent analysis technology is still a problem that needs to be solved urgently. Due to the complexity and diversity of the power system site, it is difficult to popularize the video intelligent analysis technology. Currently, it takes a lot of time and energy to research the operation of the power system and accumulate a large amount of video information and historical data for the research of video intelligence analysis. And applications provide a solid data foundation.

New Energy Vehicle Charging Facilities: Focusing on Charging Energy Management In the overall structure of the smart grid, electric vehicles, charging and replacing auxiliary facilities, and energy management programs are an important part of the smart power link. China's new energy automotive industry is still at an early stage of development. According to the national “Twelfth Five-Year Plan”, the next five years will be a crucial period for the transition from an R&D stage to an industrialization stage for electric vehicles. “Pure Electric Drive” will become China’s new The direction of the development of energy automotive technology is expected that by 2015, sales of new energy vehicles will reach about 1% of the total sales of similar models. More importantly, support technologies such as batteries, motors, and electronic control will be given priority. Among them, by 2015, the national plan will be to build 400,000 charging piles and 2,000 charging and replacing stations in more than 20 model cities and surrounding areas. Constitutes a networked power supply system to meet the energy supply needs of large-scale commercial applications of electric vehicles.

“Electric vehicles help reduce energy consumption, make full use of renewable resources, and improve people’s quality of life.” Wang Hesheng, manager of key industry management at Phoenix (China) Investment Co., Ltd., said, “For the future of the electric vehicle industry, Phoenix Contact Committed to providing support for a full range of charging infrastructure and flexible modular solutions. At the same time, an AC/DC combined charging system has been developed. The advantages of the system are based on the IEC 62196-3 standard. The advantages lie in the special geometry and vehicles. The design of the charging socket interface, which can connect AC and DC connectors at the same time, meets the needs of fast charging, makes DC and AC hybrid charging possible, so that car manufacturers can supply their customers with only one interface. The universal charging system also greatly improves efficiency."

In addition to hardware devices, the charging energy management system for electric vehicles is also a hot area of ​​concern. It can concentrate on acquiring and displaying status data on power requirements or error messages, as well as monitoring the main load conditions. Wang Hesheng introduced: "Charging energy management system allows users to be identified after the charging station, to obtain matching data during the charging process, such as charging time or power consumption and other information, making the charging process more intelligent." With advanced The charging energy management system can also monitor and maintain the charging infrastructure through a Web browser, so that operators of the charging/swapping service can improve management efficiency and make the smart grid in the future more intelligent.