Local power coordinated control system and method of active power distribution network

Abstract

The invention proposes a local power coordinated control system and method of an active power distribution network, and belongs to the technical field of local power coordinated control of the active power distribution network. The local power coordinated control system is based on long-period economic optimized operation of the active power distribution network, the regulation period is short, load change can be effectively and dynamically responded, and the global optimized economic operation of the system also can be satisfied. In the system, a coordinated control strategy for distributed power generation and energy storage of the active power distribution network when a load changes in different situations is fully considered, the output of a distributed power source and a network-side power source can be adaptively adjusted, the active power distribution network can efficiently and economically run by means of power generation capability of the distribution power source, and meanwhile, the residual energy in the system can be reasonably regulated and controlled. By the method, the sharing proportion coefficients of the distributed power source and the network-side power source on the load change can be rapidly and accurately solved, the rapid response of a local system to the load change is achieved, and the safe and economic operation of the system is ensured.

Description

technical field [0001] The invention belongs to the technical field of local power coordination control of an active distribution network, and in particular relates to a system and method for a local power coordination control of an active distribution network. Background technique [0002] With the rapid development of distributed generation, its high penetration access has brought many challenges to traditional distribution networks, such as power quality, power flow planning, relay protection, etc., which has given birth to a new type of distribution network called active distribution network. The active distribution network aims to use distributed generation, energy storage, and controllable loads in the distribution structure as regulation means to maintain the power quality of the distribution network, optimize the configuration of the distribution network flow, and ensure the safe and stable operation of the distribution network. Therefore, the research on power coord...

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Problems solved by technology

However, due to the large amount of distributed generation (DG) access in the distribution network under high penetration, coupled with a large number of energy storage and controllable loads, this global power optimization control will undoubtedly involve the processing of massive data, so its The control cycle is bound to be very long. If there is an unplanned load change in the local distribution network between the two control cycles, the long-term optimal control results will not be able to respond well to the load change in the system. Research on the coordinated control of local power in the active distribution network; the existing research on the coordinated control of local power in the active distribution network is not too much, and the control methods have limitations, and it is impossible to achieve adaptive adjustment under the influence of multiple factors The network side and each DG balance the proportion of load changes in the local network

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