A Modeling of Multiple Uncertain Energy Flows Integrating Active Distribution and Transmission Networks
A technology of active distribution network and transmission network, applied in the direction of circuit devices, AC network circuits, AC networks with the same frequency from different sources, etc.
Active Publication Date: 2020-05-08
马瑞
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[0004] In fact, the energy flow modeling and algorithm of integrated active distribution network and transmission network under energy interconnection have not been studied yet, and a method for modeling uncertain energy flow of integrated active distribution network and transmission network is proposed
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[0014] The present invention comprises the following steps:
[0015] 1. Establish an uncertain model of active distribution network and transmission network source and load under energy interconnection and extract its temporal and spatial correlation characteristics.
[0016] Under the energy interconnection, the source and load data originally injected into the active distribution network and transmission network are affected by weather and energy consumption behaviors, and have uncertain characteristics of randomness and fuzziness. According to the uncertainty theory, it is defined as a random fuzzy variable, and obtained Chance measure function. where a i , b i and c i is the fuzzy parameter of the density function
[0017]
[0018] Consider spatio-temporal correlation: After obtaining multi-energy injection active distribution network power and transmission network source and load prediction values through stochastic fuzzy simulation, then use auto regression movi...
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The invention belongs to the technical field of energy flow calculation for an integrated system of an active distribution network (ADN) and a power transmission network and puts forward a new method for calculating multiple uncertain energy flows of the integrated system of the active distribution network (ADN) and the power transmission network under energy interconnection. The method comprises the following steps: an analog to a random fuzzy space-time correlation sequence for injection of multiple energies into an EH is realized, an EH model under the energy interconnection is built, and the value of interaction of the EH and the distribution network is obtained. The positive / negative / zero value of a joint node PLi, t of the active distribution network (ADN) and the power transmission network respectively corresponds to a load / power supply / isolated island operation mode of the ADN. The power transmission network in the isolated island mode and the ADN run in a completely decoupled manner, corresponding to an N-1 state of an electric power system; in the load / power supply mode, the power and the voltage of the power transmission network and the active distribution network ADN at the joint node are used as shared variables to build an SOS-based active distribution network (ADN) and power transmission network energy flow model, and therefore energy flow results can be obtained. The multiple uncertain energy flow modeling and calculation method can adapt to an energy interconnection development trend and provide a corresponding guidance basis for future power generation plan arrangement and scheduling when a huge amount of new energy is injected into the electric power system in the future.
Description
technical field [0001] The invention belongs to the technical field of multiple uncertain energy flow modeling of an integrated system of an active distribution network and a transmission network, and proposes a modeling of multiple uncertain energy flows integrating an active distribution network and a transmission network. Background technique [0002] It is of great significance to construct the decomposed and coordinated multiple uncertain energy flow model of the active distribution network and the transmission network under the interconnection of extracted energy for the arrangement of system operation mode and safety check. With the increasing range of comprehensive energy utilization of electricity, gas, and heat and the continuous increase in capacity, a large number of DERs and CCHPs are connected to the distribution network, and the traditional distribution network has developed into an active distribution network with bidirectional power flow and multi-energy coup...
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IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 马瑞吴瑕颜宏文
Owner 马瑞