1.1 Large-capacity wind turbines grid-friendly control technology
Aiming at the safe and stable operation requirements of large-scale wind power after power grid access, the grid-friendly power generation control technology of large-capacity wind turbines is studied. Including: wideband dynamic characteristics and quantitative analysis methods of typical doubly-fed and direct-drive fans; optimal control technology for wind turbine inertia and primary frequency modulation support; wind power generation optimization control technology for power grid secondary/super-synchronous frequency; power grid fault Optimal control technology for wind power generation equipment supporting grid voltage and frequency in transient process; load analysis and stable optimization control of wind turbines under different grid operating conditions.
1.2 Distributed PV multi-port access DC power distribution system key technology
Study the integrated optimization technology and equipment of distributed photovoltaic multi-port access DC power distribution system to improve the scale and high-permeability distributed photovoltaic grid-connected capacity. Including: topology, parameters, and system interaction of distributed photovoltaic multi-port DC converter; distributed photovoltaic system integration and engineering design technology for medium voltage or low voltage DC grid-connected; development of medium and low voltage photovoltaic multi-port DC converter ; Control, protection and operation technology of DC distribution system with high proportion of distributed photovoltaic; MW-level empirical platform overall scheme, key technology and equipment empirical research.
1.3 Wind power/photovoltaic power prediction technology to promote renewable energy consumption
To study integrated power forecasting and optimization scheduling technologies for power generation departments and wind power/photovoltaic field stations to improve the power forecasting level of new energy generation such as wind power/photovoltaic, and to improve the application of prediction results in renewable energy power generation dispatching. Renewable energy consumption. Including: electricity forecasting for medium and long-term dispatching and annual and monthly scheduling methods considering wind power/photovoltaic power generation seasonality and randomness; probabilistic forecasting technology for short-term daily dispatching and multi-space scale short-term power forecasting technology; considering resource correlation and other factors Wind power/photovoltaic ultra-short-term power prediction technology; wind power/photovoltaic risk scheduling decision-making method considering prediction uncertainty; spare capacity optimization configuration and emergency control technology for risk response.
Eliminate flexible interconnection of large power grids2.1 Economical high voltage AC current limiter technology with voltage rating of 500kV and above
To solve the problem of short-circuit fault current exceeding the standard of high-voltage AC power grid, research on economical high-voltage AC current limiter technology. Including: circuit topology of high-voltage AC current limiter and design of high-voltage insulation, electromagnetic compatibility, dynamic thermal stability, etc.; manufacturing technology of key components such as large-capacity flow, rapid switching and operation of current limiter; short circuit of power grid Fault detection and rapid identification technology; operation control and protection technology of the current limiter, and matching and coordinated operation technology of the current limiter and the circuit breaker; test technology and related standard specifications of the current limiter.
2.2 Basic research on superconducting DC energy pipeline
The application of basic research and prototype research on the transmission/transport fuel integrated superconducting energy pipeline based on the mixed working temperature of natural gas and other fuels is carried out to promote the application of superconducting technology in transmission and energy transportation. Including: the development of natural gas-based mixed working fluid and its heat transfer and insulation properties; the electromagnetic properties of superconducting materials in mixed working fluid temperature and its changing law; the principle and structure of transmission/transport fuel integrated superconducting energy pipeline, heat The law of loss variation and the influence of liquid fuel delivery rate on the temperature distribution of energy pipelines; the key technologies for design and manufacture of transmission/transport fuel integrated superconducting energy pipelines and their high-voltage current terminals, low-temperature high-voltage insulation technology; Operational control technology and test specifications for fuel transportation of superconducting energy pipelines.
2.3 High-performance analysis and situational awareness technology for interconnected large power grids
Considering the timeliness, accuracy and scale of online safety and stability analysis of AC/DC interconnected large power grids, research on online modeling and high-performance precision simulation, situational awareness and trend prediction technology based on wide-area measured steady-state/dynamic information to improve grid operation Efficiency and safety. Including: integrated real-time sensing method of multi-basic information such as dynamic power flow, topology and parameters of complex power grid; measurement and identification modeling theory and technology of distributed hierarchical dynamic equipment component set; online super-real-time electromechanical for large grid for various typical fault disturbances - Electromagnetic hybrid simulation technology; power system dynamic feature analysis, trend prediction and visualization method based on massive data such as RTU/PMU; on-line integrated dynamic security stability assessment method for power system considering dynamic characteristics of power grid.
2.4 Basic theory of fault current suppression for flexible DC grid
Aiming at the problem of rapid rise of fault current caused by weak damping of flexible DC grid in the future, the theory and method of fault current suppression for multi-voltage grade flexible DC grid are studied. Including: flexible DC grid structure, interaction mechanism between steady state and transient power flow transfer; flexible DC grid operating characteristics, transient interaction mechanism and fault evolution law; power electronic device topology for improving fault current suppression capability of flexible DC grid And its control strategy; flexible DC grid fault current synergy suppression method considering fault current suppression device; flexible DC grid device modeling and digital-physical hybrid simulation method.
Multi-user supply and demand interactive electricity3.1 Key Technologies of Medium and Low Voltage DC Power Distribution System
Carry out research on key equipment and technology of medium and low voltage DC power distribution system, break through the bottleneck of the construction technology of medium and low voltage DC power distribution system, overcome the problem of safe and stable operation of multi-voltage level DC power distribution system, and improve system operation efficiency and power supply reliability. Including: researching the DC voltage system sequence and typical power supply mode for different application scenarios; developing key equipment such as DC circuit breaker, DC metering and protection sensor that meet the requirements of medium and low voltage DC power system; Optimized operation control strategy of inverter grid-connected and multi-voltage level DC power distribution system; research on multi-voltage level DC power system protection method and key technology; carry out technology integration demonstration application.
3.2 Key Technologies for Reliable Operation of Multi-platform Interconnected Power Systems at Sea
In view of the high-reliability operation of offshore oil and gas exploration, treatment and transportation power systems, the structural optimization, protection control and simulation analysis techniques of offshore multi-platform interconnected power systems are studied. Including: structural optimization method and reliability assessment method for offshore multi-platform interconnected power system; fault mode and protection and self-healing control method for offshore platform power system; integrated energy management system for offshore platform; dynamic model study of key components of offshore power system Analyze the stress characteristics of key components in normal, overload, and major failure modes.
3.3 Power system terminal embedded components and control unit security protection technology
In order to ensure the safe and stable operation of the power system and smart energy, the security protection and detection technology of the power monitoring system chip core, the embedded components and the control unit in the power terminal are studied for the security interconnection and power field operation requirements of the power system intelligent equipment. Including: power monitoring system chip circuit level security protection technology; power dedicated CPU and chip and embedded operating system (Embedded OperaTIng System); embedded components and control unit in active terminal with active immunity; power industrial control terminal and embedded Safety monitoring and anti-seepage technology of the control unit; safety protection technology for power system edge calculation.
3.4 Key technologies for energy Internet in new towns
Focusing on the technical needs of new urban clean energy development and utilization, research on key technologies of energy Internet and realize engineering demonstration. Including: energy system architecture and planning and design methods in energy Internet; energy system operation optimization method and energy optimization management technology; user individual and group energy consumption characteristics analysis and prediction methods, energy transaction mode and information support technology; energy Internet technology economic evaluation theory And evaluation methods; new urban energy Internet demonstration project.
Multi-energy complementary distributed energy supply and microgrid4.1 Key technologies of distributed energy supply systems with complementary renewable energy sources
For distributed energy supply systems complementary to renewable energy, improve the comprehensive utilization efficiency of terminal energy, and carry out research on distributed generation and heat/cold co-generation technologies that complement renewable energy and fossil energy. Including: distributed energy system design technology with complementary characteristics of renewable energy; technology for preparing clean fuel and power generation by using renewable energy such as solar energy; key technology for driving waste heat and power supply by power waste heat; multi-energy complementary and electric heating/ Combined heat and power technology with heat pump; active control and optimized control technology for distributed system.
4.2 Distributed photovoltaic and cascade small hydropower complementary combined power generation technology
Research on distributed photovoltaic and cascade small hydropower combined grid-connected power generation system and variable speed constant frequency pumped storage technology. Including: capacity optimization configuration and access technology of cascade water-photovoltaic hybrid power station; operation characteristics and system stability analysis of distributed photovoltaic and cascade small hydropower complementary systems; joint operation control and intelligent dispatching technology and system of cascade water-light complementary power station; The key technology of the frequency reversible hydro-generator unit; the demonstration application of the cascade water-light complementary combined operation power generation system.
Smart grid basic support technology5.1 ladders use power battery scale engineering application key technology
In view of the situation of a large number of power battery decommissioning in China, we study the key technologies of power battery ladder utilization in large-scale engineering application in smart grid, including: health status assessment and residual value assessment technology for decommissioned power battery cells and modules; Sorting and recombination technology; use of power battery electricity, heat and safety management technology; step-by-step utilization of power battery application scenario analysis, reuse life assessment and economic evaluation technology; ladder use of power battery re-decommissioning standards.
5.2 Basic research on high-safety and long-life solid-state batteries
In view of the extensive demand of smart grid for intrinsic safety, long life and low cost advanced energy storage technology, the basic scientific problems and key technologies of energy storage solid-state batteries are studied. Including: solid-state battery electrode and electrolyte key material system; thermodynamics, kinetics, interface and stability research in solid-state battery; design and preparation of solid-state battery cell; failure mechanism and health evaluation of solid-state battery in life cycle; Battery safety evaluation methods and standards.
Research on Key Technology of 5.3MW Advanced Flywheel Energy Storage
In view of the short-time high-frequency energy storage technology demand of the power grid, the advanced flywheel energy storage single-machine and array technology is studied. Including: flywheel body technology; development of low-loss high-speed motor and control system; high reliability and large bearing capacity bearing system technology; control technology of flywheel energy storage array; integrated application technology of flywheel array system.
5.4 Key Technologies for Liquid Metal Energy Storage Batteries
In view of the demand for small and medium-sized distributed energy storage in smart grids, the key technologies of new liquid metal energy storage batteries are studied. Including: high performance electrode and electrolyte materials; battery liquid / liquid interface stability control technology; battery high temperature long-term sealing key materials and technology; battery cycle life and failure mechanism; battery group technology and energy management system.
5.5 Silicon Carbide High Power Power Electronic Devices and Applied Basic Theory
For the future smart grid demand for silicon carbide high-power power electronic devices, the basic theory of application of chips and device packages for 15kV silicon carbide high-power IGBT devices is studied. Including: the influence mechanism of silicon carbide material performance on chip electrical characteristics; structure and method to improve chip electrical performance and power; device package multi-chip parallel current sharing, electrical insulation, electromagnetic compatibility and drive protection method; device aging mechanism and reliability The lifting method; the high-voltage series technology of the device and the application verification of the flexible DC converter valve power module.
5.6 Comprehensive analysis and reliability assessment of multi-physics of large-capacity power electronic equipment
The proportion of power electronic equipment used in smart grids is increasing. Under this background, the reliability evaluation theory and method of high-density and large-capacity power electronic equipment above 10MVA are studied. Including: multi-physics comprehensive interaction and multi-time scale interaction mechanism of key components under complex conditions; dynamic failure mechanism and safe operation domain characterization method at key component level and equipment level; electromagnetic stress, temperature and aging state of key components Online extraction method and verification; equipment multi-physics joint modeling and simulation method; equipment optimization design and reliability assessment method.
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