Intelligent power distribution station based on grid source load storage coordinated control and grid source load storage coordinated control system thereof

Abstract

The invention discloses a power distribution station based on grid source load storage coordinated control and a grid source load storage coordinated control system thereof. The system comprises a centralized decision layer, a distribution control layer and an equipment layer which are connected through the network. The equipment layer comprises power distribution equipment of multiple power distribution stations and distributed energy sources. The distributed energy sources comprise a photovoltaic system, an energy storage system and charging piles which are constructed in a way of being combined with the power distribution equipment and accessed to a low voltage side bus through distributed energy source interfaces. The distribution control layer comprises power distribution automatic terminals and grid source load storage coordinated control terminals which are corresponding to all the power distribution stations. The centralized decision layer comprises a power distribution automatic scheduling master station which is connected with all the power distribution automatic terminals and a grid source load storage coordinated control master station which is connected with all the grid source load storage coordinated control terminals. The grid source load storage coordinated control master station controls working of the distributed energy sources in the corresponding power distribution stations through the grid source load storage coordinated control terminals of all the power distribution stations. Coordinated control of the distributed energy sources can be realized by using the grid source load storage coordinated control system so as to achieve the objective of scheduling optimization.

Description

technical field [0001] The invention relates to the technical field of intelligent power transformation and distribution, in particular to an intelligent distribution station based on coordinated control of network source, load and storage and a network source, load and storage coordinated control system. Background technique [0002] With the gradual development of renewable energy utilization technology, the number of distributed energy resources is increasing rapidly. Compared with the centralized power supply system of conventional large power plants, distributed energy systems are beneficial supplements to large power grids, can be supplied locally, and have low energy consumption. Supplementing the power supply capacity of the large power grid at peak load can make up for the lack of security and stability of the large power grid in some areas and special circumstances, and continue to supply power when accidental disasters occur; the cost of civil engineering and insta...

AI Technical Summary

Problems solved by technology

[0009] (1) When connecting directly, focus on the control of the public connection point. On the one hand, the random and intermittent characteristics of distributed energy generation are obvious, and its power curve is inconsistent with the load power consumption curve. On the other hand, the power grid dispatching system is not capable of dispatching energy and loads when it is directly connected, and the integration of resources is not strong enough, resulting in the inefficient use of resources;

[0010] (2) When connected in the form of a micro-grid, island operation is required, its management is relatively independent, the control system is complicated, and once the scale is determined, it is difficult to expand, which limits the development of distributed energy, and the relative cost is also high. regulation;

[0011] (3) In addition, different power supply manufacturers provide different grid-connected interfaces, which require long debugging time and high installation costs for each connection

[0012] At the same time, no matter which way it is connected to the grid, the access of distributed energy will have many adverse effects on the distribution network:

[0013] (1) The access of distributed power sources has an impact on the grid voltage. Distributed power sources will inject active power and reactive power at the grid-connected point, causing the voltage level of the grid-connected point and surrounding nodes to rise or even exceed the limit. capacity distribution transformers, such problems are particularly prominent;

[0014] (2) The access of distributed power sources has an impact on the loss of the power grid. At present, the access of distributed power sources seldom considers the optimal configuration. Unreasonable configuration will change the original grid structure and power flow, which will not only fail to save energy, but will increase the loss of the power grid ;

[0015] (3) The access of distributed power sources has an impact on the operation and management of the power grid. The output power of wind power and photovoltaic power generation is uncertain. Due to reasons such as communication, it cannot be included in the scope of monitoring and data collection of the distribution automation system, making it impossible for dispatchers to real-time Monitoring and reasonable arrangement will bring difficulties to the safe and stable operation of the distribution network;

[0016] (4) The access of distributed power has an impact on the reliability of power supply. The original purpose of the access of distributed power is to improve the reliability of power supply, and the distributed power connected to the distribution network needs to be installed with reverse power protection, and island operation is not allowed The distributed power generation has no positive effect on improving the reliability of power supply

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