A State Variable Sensitivity Calculation Method Applicable to Radial Distribution Network Reconfiguration
A state variable, power distribution network technology, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problems of high dimensionality of the state equation, increase the amount of calculation, and reduce the amount of calculation. The effect of small calculation amount and guaranteed calculation accuracy
Active Publication Date: 2016-08-10
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID +1
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However, for a distribution network with many nodes, the dimension of the state equation is relatively high, and the current calculation method of the power flow calculation method commonly used is relatively large. In addition, it needs to be recalculated once to change a group of switching operations, which increases the calculation amount.
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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0030] Such as figure 1 As shown in , the calculation method of state variable sensitivity suitable for radial power distribution network reconstruction includes the following sequential steps:
[0031] 1) Establish a set of switch operations;
[0032] 2) Divide active network and passive network;
[0033] 3) Inject power equivalent to the connection line between the active network and the passive network, solve the state equation of the active network, and obtain the sensitivity of the state variable of the active network;
[0034] 4) Equivalent injection power to the connection line between th...
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The invention discloses a state variable sensitivity calculation method applicable to radial distribution network reconfiguration. The method comprises the steps of effective on-off operation definition of radial distribution network reconfiguration, partition of reconfigured active networks and reconfigured passive networks, active network state variable sensitivity calculation, passive network state variable sensitivity calculation and network function estimation. According to the state variable sensitivity calculation method, node voltage and load flow distribution formed after network reconfiguration can be accurately estimated, the distribution network is divided into a plurality of subnetworks not influencing one another, and the dimensionality of a single network state equation is effectively reduced, so that calculation precision is ensured, and meanwhile the calculation amount is greatly reduced. The state variable sensitivity calculation method can be used for distribution network reconfiguration scheme selection.
Description
technical field [0001] The invention relates to the field of calculating the sensitivity of state variables of power distribution networks, in particular to a method for calculating the sensitivity of network state variables suitable for reconfiguration of radial power distribution networks. Background technique [0002] In order to improve the reliability of power supply, the medium-voltage distribution network is generally designed as a mesh structure, but in order to reduce the short-circuit current and simplify the configuration of protection schemes, the medium-voltage distribution network generally operates in an open loop. This distribution network with mesh design and open-loop operation provides a physical basis for network reconfiguration. Distribution network reconfiguration technology refers to changing the network structure of the distribution network through a set of switch operations to achieve the goal of minimum network loss or power balance of different fee...
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IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 田兵许爱东郭晓斌董旭柱雷金勇于力吴争荣王建邦魏文潇黄伟彭飞进
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID