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Active power distribution network multi-period island operation method giving consideration to intelligent soft switch

A technology of intelligent soft switching and operation method, which is applied in the direction of single-network parallel feeding arrangement, electrical components, circuit devices, etc., and can solve problems such as less involvement

Active Publication Date: 2018-03-13
TIANJIN UNIV
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Problems solved by technology

[0003] Intelligent soft switch (soft open point, SOP) is a new type of intelligent power distribution device that replaces the traditional contact switch. The application of intelligent soft switch will greatly improve the flexibility and controllability of power distribution system operation. Some scholars have carried out preliminary research, but the role of intelligent soft switches in the distribution network island operation, especially considering the role of multi-period load restoration, is rarely involved.

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  • Active power distribution network multi-period island operation method giving consideration to intelligent soft switch

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specific Embodiment

[0138] For this embodiment, first input the impedance value of the line element in the IEEE 33 node system, the active power and reactive power of the load element, and the connection relationship of the network topology. The calculation example structure is as follows figure 2 As shown, see Table 1 and Table 2 for detailed parameters; 4 groups of controllable distributed power sources are connected to nodes 13, 20, 23, and 30, with a capacity of 400kVA and a minimum power factor of 0.9; nodes 5, 8, 17, 27 and 33 are connected to 5 groups of uncontrollable distributed power sources. In this embodiment, a photovoltaic power generation system is selected, with a capacity of 300kVA and a minimum power factor of 0.9; see Table 3 for the access location and parameters of the energy storage system; Soft switch SOP connection test example, replacing tie switches TS1 and TS3, with a capacity of 1000kVA and a loss coefficient of 0.02. It is stipulated that the direction of power transm...

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Abstract

The invention discloses an active power distribution network multi-period island operation method giving consideration to an intelligent soft switch, and the method comprises the steps: inputting a selected power distribution system structure and parameters; building an active power distribution network multi-period island operation model; carrying out the linearization, second-order conic model transformation and rotating conic model transformation of a target function and nonlinear constraint conditions in the active power distribution network multi-period island operation model according toa standard form of conic planning; employing a conic planning solving method for solving a second-order conic planning model, and obtaining the recovery load coefficient of each node, the output power and control modes of controllable and uncontrollable distributed power supplies, the charging and discharging power and load states of an energy storage system and the transmission power of the intelligent soft switch. and outputting a solving result. The method gives full consideration to the impact on the island operation of a power distribution system from the access of the intelligent soft switch, and the second-order conic planning model for the active power distribution network multi-period island operation, and the problem of the active power distribution network island operation is solved.

Description

technical field [0001] The invention relates to a multi-period islanding operation method for an active distribution network. In particular, it relates to a multi-period islanding operation method for an active distribution network considering intelligent soft switching. Background technique [0002] Self-healing is one of the important features of smart distribution network, especially under extreme fault conditions, the use of distributed generators (distributed generators, DG) can realize the island operation of some important loads to improve the reliability and flexibility of system operation. After the power distribution system fails, the coordination and cooperation of distributed power supply and energy storage system can often ensure the continuous power supply of important loads, so as to reduce the range of affected users and improve the reliability of the system. When the power distribution system operates in an island, due to the strong randomness of the output...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/28
CPCH02J3/28H02J3/381H02J3/388H02J2203/20
Inventor 宋关羽王成山李鹏赵金利冀浩然
Owner TIANJIN UNIV
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