A Fully Distributed Autonomous Voltage Control Method for Active Distribution Network
A voltage control method and technology of active distribution network, applied in the direction of AC network voltage adjustment, reactive power compensation, etc., can solve the problem of information processing bottleneck, the control center is difficult to maintain the global model of the power grid in real time, and it is difficult to collect all information in the control area.
Active Publication Date: 2017-10-31
TSINGHUA UNIV
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Problems solved by technology
[0004] (1) Massive information problem: Distributed power generation and its huge network scale are very likely to cause communication congestion and information processing bottlenecks;
[0005] (2) Maintainability issues: There are many distribution network equipment and frequent changes, and it is difficult for the control center to maintain the global model of the entire power grid in real time;
[0006] (3) Privacy issues: Different control areas may belong to different operating entities. Due to commercial confidentiality, it is difficult for the control center to collect all information in each control area
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[0170] The present invention proposes a fully distributed autonomous voltage control method for an active power distribution network, which is described in detail in conjunction with embodiments as follows:
[0171] The present invention proposes a fully distributed autonomous voltage control method for an active distribution network, which is characterized in that the method includes the following steps:
[0172] 1) Establish a non-convex voltage control model composed of objective functions and constraints for active distribution networks:
[0173] The objective function is to minimize the sum of the active power loss of the whole network, which is equivalent to minimizing the active power output by the generators of the whole network:
[0174]
[0175] Among them, i is any node of the active distribution network, P Gi Is the generator active power of node i, which is an optimization variable, G is the generator set of the entire active distribution network, {0} is the set of slack ...
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The invention relates to a fully-distributed autonomic voltage control method for an active distribution network, and belongs to the technical field of operation and control of power systems. The method includes two stages, wherein the first stage includes the steps of building a voltage control convex relaxation model; dividing a feeder into a plurality of control areas, wherein one control area can be composed of one or a plurality of buses, generators and reactive compensation devices, and the generators and the reactive compensation devices are hung on the buses; locally communicating with a neighbor through each control area; solving the optimal local control quantity of global voltage distribution by the alternating direction method of multipliers; the second stage includes the step of adjusting the voltage amplitude of a feeder root node through the substation side so as to maximize the safety margin of voltage amplitude distribution; the two stages are performed by an iteration manner until no new optimal operation appears. The method is applicable to large-mass distributed power connected distribution network voltage control; the data privacy of the control area can be protected well; the method is high in sensitivity and flexibility.
Description
Technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a fully distributed autonomous voltage control method for an active power distribution network. Background technique [0002] The quality of the power system voltage directly interferes with the stability of the power system and the safe operation of power equipment, and the level of reactive power has a great impact on the quality of the voltage and the loss of the power system. Therefore, the goal of voltage control is often to adjust the reactive power of the generators and reactive power compensation equipment in the power system, so that the node voltages in the power system are distributed in a safe area, and the active power of the entire system The loss is as small as possible. [0003] The access of large-scale distributed power sources has brought profound changes to the operation of the distribution network, making the traditional distr...
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IPC IPC(8): H02J3/12H02J3/16
CPCH02J3/12H02J3/16Y02E40/30
Inventor 吴文传张伯明孙宏斌郑伟业郭庆来王彬
Owner TSINGHUA UNIV