Three-phase unbalanced dynamic power flow model predictive control method for distribution network with smart community

A technology of model predictive control and dynamic power flow, which is applied to AC networks, circuit devices, and AC network circuits with the same frequency from different sources, and can solve the problem of load uncertainty, Issues such as the grid-connected operation of the CCHP system, unbalanced three-phase, and real-time performance of difficult systems are not considered

CN108471119AActive Publication Date: 2018-08-31CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-08-31

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Abstract

The invention discloses a three-phase unbalanced dynamic power flow model predictive control method for a distribution network with a smart community. Mainly aiming at the problems of distribution network power flow and optimal control when multi-energy is able to access the distribution network, a method for accessing various kinds of distributed energy to the distribution network in a centralized single-point manner to perform optimal control and solving the dynamic power flow of the distribution network online is provided, Considering the fluctuation of community distributed wind power, photovoltaic output and load, aiming at community economy and environmental protection operation, local consumption of the distributed energy is achieved, and energy interaction with the distribution network is carried out, so as to improve the utilization rate of the distributed energy. According to the distributed power supply and load change conditions of the system, a dynamic power flow analysismethod for the three-phase unbalanced distribution network containing a community multi-energy hub is proposed. A model predictive control technology is used for solving the power flow of the distribution network online in a rolling mode, in line with the real-time characteristics of the system operation, and improvement of the control level and operational safety of the distribution network undermulti-energy coordination is facilitated.
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Description

technical field

[0001] The invention relates to the energy Internet, in particular to the dynamic power flow of a distribution network including a community multi-energy flow optimization management system, and belongs to the technical field of multi-energy intelligent management and control. Background technique

[0002] Due to the decentralized and uncertain nature of distributed energy, direct access to the distribution network will have a greater impact on the power flow of the distribution network and increase the difficulty of regulating the distribution network. How to improve the distribution network's consumption and active management and control of distributed energy has become the focus of research on the premise of taking into account system economy, environmental protection, and safe operation.

[0003] For the problem of distributed energy access to the distribution network, there are two types of processing methods: one is to directly connect distributed energ...

Examples

Embodiment Construction

[0012] In order to more clearly illustrate the purpose and technical solutions of the present invention, further description will be given in conjunction with examples and accompanying drawings.

[0013] 1. Community multi-energy flow optimization model considering economic operation and environmental protection indicators.

[0014] 1) Uncertainty analysis

[0015] The random response surface method is used to analyze the probability density curves of forecast errors such as distributed wind power and light output, load and real-time electricity price, and discretize them, and the roulette algorithm is used to generate an initial scene set with corresponding probabilities, and the nearest neighbor clustering is used to reduce the scene . Take wind power output as an example for illustration.

[0016] Step 1: Taking the wind speed subject to the double-parameter Weibull distribution as an example, the standard normal distribution is used to standardize the wind speed, and the...