An intelligent soft-switching power supply restoration method for distribution network considering the importance of load

Abstract

The invention discloses a method for recovering power supply of a soft open point of a power distribution network in consideration of load importance. The method comprises the following steps: inputting a line parameter, a load level, the load importance, a network topologic connection relationship, a system running voltage level, a branch current limit, a soft open point access position, a capacity, a loss coefficient, a system fault position, a reference voltage and a reference power initial value according to a selected power distribution system; establishing a mathematic model for recovering power supply of the soft open point of the power distribution network in consideration of the load importance: setting maximum recovery weighted active load of the power distribution system as a target function, and considering a system load flow constraint, a running voltage constraint, a branch current constraint and a soft open point running constraint respectively; solving the obtained mathematic model by a prime-dual interior point method; and outputting solving results, including a target function value, voltage amplitudes and phase angle of nodes, recovery load coefficients of the nodes and a soft open point transmission power value. Through adoption of the method, hidden danger caused by switching operations is avoided; the safety and reliability are enhanced; and the fault self-recovering capability of the power distribution network is improved comprehensively.

Description

technical field

[0001] The invention relates to a power supply recovery method of a distribution network. In particular, it relates to a distribution network intelligent soft-switching power supply recovery method considering the importance of load. Background technique

[0002] Distribution network power supply restoration usually means that when a permanent fault occurs in the distribution network, by adjusting the state of the section switch and tie switch, changing the topology of the distribution network, and quickly restoring power supply to the non-fault outage area. Since the number of switching operations, the amount of load recovery, network constraints, load levels and other factors should be considered comprehensively, the power supply recovery of distribution network is a multi-objective, multi-combination, multi-constraint nonlinear combinatorial optimization problem. With the access of distributed generation (Distributed Generation, DG), the traditional singl...

Examples

Embodiment Construction

[0030] A method for recovering power supply of power distribution network with intelligent soft switching considering the importance of load will be described in detail below in combination with embodiments and drawings.

[0031] An intelligent soft switch power supply recovery method of distribution network considering the importance of load in the present invention, such as figure 1 shown, including the following steps:

[0032] 1) According to the selected power distribution system, input line parameters, load level, load level, network topology connection relationship, system operating voltage level and branch current limit, intelligent soft switch access position, capacity and loss coefficient, system fault location , initial values ​​such as reference voltage and reference power;

[0033] For the embodiment of the present invention, 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, th...

technical field

[0001] The invention relates to a power supply recovery method of a distribution network. In particular, it relates to a distribution network intelligent soft-switching power supply recovery method considering the importance of load. Background technique

[0002] Distribution network power supply restoration usually means that when a permanent fault occurs in the distribution network, by adjusting the state of the section switch and tie switch, changing the topology of the distribution network, and quickly restoring power supply to the non-fault outage area. Since the number of switching operations, the amount of load recovery, network constraints, load levels and other factors should be considered comprehensively, the power supply recovery of distribution network is a multi-objective, multi-combination, multi-constraint nonlinear combinatorial optimization problem. With the access of distributed generation (Distributed Generation, DG), the traditional singl...

Examples

Embodiment Construction

[0030] A method for recovering power supply of power distribution network with intelligent soft switching considering the importance of load will be described in detail below in combination with embodiments and drawings.

[0031] An intelligent soft switch power supply recovery method of distribution network considering the importance of load in the present invention, such as figure 1 shown, including the following steps:

[0032] 1) According to the selected power distribution system, input line parameters, load level, load level, network topology connection relationship, system operating voltage level and branch current limit, intelligent soft switch access position, capacity and loss coefficient, system fault location , initial values ​​such as reference voltage and reference power;

[0033] For the embodiment of the present invention, 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, th...

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