Distribution network coordination control system and control method taking account of distributed power

Abstract

The invention relates to a distribution network coordination control system taking account of distributed power, comprising a main control, a simulation display screen, thirteen groups of mutual inductors, nine groups of distributed switch control terminals, two groups of distributed power installation control terminals, two groups of distributed energy-storing device control terminals, two groups of distributed power installations, two groups of three-phase inversion devices, two groups of energy-storing devices and two groups of charging / inversion devices. The invention enables the distribution system to possess a run state coordinating the distributed power in the network, thereby realizing the capability of making the clean energy utilization rate maximization in the network. By the invention, the run state of the distributed power is coordinated and optimized to realize that the load tracking rate of the clean energy reaches more than 70%, meanwhile, avoid the impact to the distribution network due to any network connection / disaggregation of the distributed power; when the distribution network occurs an extreme accident, i.e. the distribution network occurs an isolated island running situation, the distributed power and the energy-storing devices are coordinated to run at the largest power, thereby guaranteeing that the important loads in the network are in normal power supply, and solving the power supply problem of the distribution network when the extreme accident occurs.

Description

technical field [0001] The invention relates to the research on the coordinated control system of the distribution network including distributed power sources, in particular to the coordinated control system and control method of multiple distributed power sources when the distribution network operates in an isolated manner. Background technique [0002] With the development of the national economy, the demand for electricity has grown rapidly, and the cost of distributed power generation equipment such as solar power, wind power, and micro gas turbine power has decreased. A large number of distributed power generation equipment has poured into the distribution network, which actively supports the operation of the distribution network. effect. However, the extensive use of distributed power sources has also changed the structure of the distribution network from radial power supply to a new model in which substation power supply is the mainstay and multiple power sources coex...

AI Technical Summary

Problems solved by technology

[0003] (1) In large-scale interconnected power systems, local accidents can easily spread, resulting in large-scale power outages;

[0004] (2) The intervention of distributed power makes the original system unable to flexibly track load changes;

[0005] (3) Multi-distributed power grid connection / splitting has a serious impact on the power quality of the system;

[0007] With the expansion of the scale and capacity of distributed power and the increase of its proportion in the power generation system, when the system tie line fails, if the capacity of distributed power and grid-connected interface are not studied and analyzed, but simply make it from Grid-connected / splitting in the distribution network not only prevents the advantages of distributed power from being fully utilized, but also greatly affects the safety and reliability of the distribution network

Although these strategies can ensure the safety of the power system to the greatest extent, they restrict or even destroy the normal operation of distributed power sources to a certain extent, seriously restricting the development and utilization of clean energy.

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