Method for optimization control of power flow of dual-power-supply seamless fault self-recovering type looped distribution network

Abstract

The invention discloses a method for optimization control of power flow of a dual-power-supply seamless fault self-recovering type looped distribution network. The method is put forward by taking network active loss and node voltage deviation into consideration based on analysis on a dual-power-supply seamless fault self-recovering type looped distribution network power supply system. The method includes that internal relations between the network active loss and generated series compensation voltage as well as between the load node voltage deviation and the generated series compensation voltage are obtained through analysis on optimized distribution rules of the power flow of the looped distribution network; a network active loss membership function and a node voltage deviation membership function are constructed respectively to represent the optimized target degree of respective deviation; weight values of the network active loss membership function and the node voltage deviation membership function are determined according to the concern degree, and series compensation voltage solving is achieved through a global optimization method. Modeling and simulating results show that the method for comprehensive optimization control of the power flow of the looped distribution network is capable of balancing force on two sides and controlling all node voltage deviation and network loss effectively, thereby laying a good foundation for the seamless fault self-recovering technology.

Description

technical field [0001] The invention designs a power distribution ring network power flow comprehensive optimization control method based on a power flow controller, and in particular relates to a dual power supply failure seamless self-healing power distribution ring network power flow optimization control method. Background technique [0002] Traditional power supply reliability only focuses on continuous power outages with a power outage time greater than 3 minutes. With the development of the digital economy, short-term power outages with a power outage time of less than 3 minutes have gradually attracted people's attention. Since the user loss caused by fault power outage is much greater than the loss of planned power outage, and the loss of short-term power outage is serious, and most of the faults originate from the distribution network, so the fault self-healing technology research is carried out for the distribution network to improve the reliability of power supply ...

AI Technical Summary

Problems solved by technology

Since the user loss caused by a fault power outage is much greater than the loss of a planned power outage, and the loss of a short-term power outage is serious, and most of the faults originate from the distribution network, so research on fault self-healing technology for the distribution network is carried out to improve the reliability of power supply , and solve the problem of short-term power outages

[0003] The traditional distribution network adopts the "closed-loop design, open-loop operation" power supply mode, even if the feeder automation and other means are used, short-term power outages cannot be avoided

Some countries and regions with high power supply reliability adopt the single power supply feeder ring network power supply mode, and quickly remove the fault by equipped with guide wire differential protection measures, effectively solving the problem of short-term power outages caused by feeder faults, but this method still cannot solve the problem Power outages caused by faults on the upstream power supply side such as bus bars and main transformers

[0004] In the traditional power distribution ring network operation mode, the power supply mode using feeders from different busbars or substations to form a ring (referred to as dual power supply ring network) has the highest reliability, but there may be a large circulating power, and traditional power flow control methods are difficult to ensure regulation Effect

The unified power flow controller based on power electronics technology and advanced control theory has a powerful power flow control function, but there are few researches on the application of distribution network

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