Distributed voltage interactive support control method and system for AC/DC hybrid power distribution network
A technology of AC-DC hybrid and control method, which is applied in the field of distributed voltage interactive support control method and system, to achieve the effect of meeting reliability requirements, improving stability, and improving the precision of reactive power sharing
Pending Publication Date: 2020-02-21
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +4
View PDF2 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a distributed voltage interactive support control method and system for the AC-DC hybrid distribution network, and solve the problem of the AC and DC sub-networks of the AC-DC hybrid distribution network. Technical Problems of Power-Voltage Interaction Support
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment example
[0116] figure 2 In order to build an AC-DC hybrid distribution network based on PSCAD, the distribution network contains 5 AC distributed power sources and 4 DC distributed power sources. Each distributed power source in the distribution network adopts droop control. Set the corresponding parameters such as voltage and power.
[0117] 1) Data collection
[0118] Based on the PSCAD simulation model, the load change of the AC-DC hybrid distribution network and the fault removal of the AC distributed power supply are simulated, and the reactive power output of each distributed power supply before and after the disturbance changes in the distribution network is collected.
[0119] The specific collection process is:
[0120] When the distribution network is running stably, record the actual output reactive power of each distributed power supply; at a certain point in time after the system is stable, a certain reactive load is applied (cutting off an AC distributed power supply)...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a distributed voltage interactive support control method and system for an AC / DC hybrid power distribution network. The method comprises a double-layer control structure formed by primary control and secondary control. Droop control is adopted for primary control, so that reactive voltage droop control adapts to the load change of the power distribution network. Distributed consistency control is adopted for secondary control, so that each distributed power supply is adjusted to distribute reactive power and recover voltage when disturbance occurs in the power distribution network. According to the invention, a double-layer control structure is established, the stability of the AC / DC hybrid power distribution network is realized through primary droop control, and AC / DC power interactive support is realized through secondary distributed consistency control. The reactive power equalization precision of droop control is improved while the system voltage is recovered. Therefore, the reactive circulating current of the system is inhibited, and the operation stability of the system is improved.
Description
technical field [0001] The invention belongs to the technical field of power system operation control, and in particular relates to a distributed voltage interactive support control method and system for an AC / DC hybrid distribution network. Background technique [0002] Distributed power is the main way to realize the utilization of renewable energy. By connecting distributed power to the distribution network, various distributed power can be managed and controlled, so that renewable energy can be fully utilized in the distribution network. Compared with the general AC distribution network, the AC-DC hybrid distribution network has the advantages of various operation modes, AC-DC interactive support, and the system can adapt to the access of various distributed power sources and loads. But at the same time, the highly random distributed energy output and flexible and diverse operation modes pose many challenges to the stable operation control of the AC-DC hybrid distributio...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H02J3/16
CPCH02J3/16Y02E40/30
Inventor 李虎成袁宇波卜强生袁晓冬高磊柳伟马春生王朝明
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST