A dynamic stochastic economic dispatch method for active distribution network
A technology of active distribution network and economic dispatch, applied in circuit devices, AC network circuits, single-network parallel feeding arrangements, etc., can solve problems such as uncertainty in power prediction
Active Publication Date: 2020-09-25
国网江西省电力有限公司经济技术研究院 +3
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The invention considers power randomness when solving the dynamic random economic scheduling problem of the active distribution network, and can be used to solve the economic scheduling problem of the active distribution network with power prediction uncertainty. The scheduling strategy has robustness and reliability, and has high application value
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[0055] A dynamic stochastic economic scheduling method for an active distribution network proposed by the present invention will be further described in detail below in conjunction with specific embodiments.
[0056] A kind of active distribution network dynamic stochastic economic scheduling method proposed by the present invention comprises the following steps:
[0057] 1) Establish a dynamic stochastic economic dispatch model of active distribution network, which is composed of objective function and constraint conditions; the specific steps are as follows:
[0058] 1-1) establish the objective function of the model; the expression is as shown in formula (1):
[0059]
[0060] in, is the generating power of unit j in period t; Ψ G It is the collection of all generator sets in the active distribution network; A i,2 、A i,1 、A i,0are respectively the consumption characteristic coefficients of generating unit j (which can be coal-fired, gas-fired, hydropower and other ...
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The invention provides an active distribution network dynamic and random economic scheduling method, which belongs to the field of power system scheduling and control. The method comprises steps: firstly, an active distribution network dynamic and random economic scheduling model formed by an objective function and constraint conditions is built; then, the constraint conditions of the model are converted, a prediction error value set of active load of all nodes in the distribution network in each time period and a distributed power supply power prediction error value set are gathered, a probability distribution set of corresponding uncertainty is built according to statistical information, chance constraints with a spinning reserve constraint included are built, and convex relaxation is used to convert the chance constraints to certainty linear constraints; and finally, a convex planning algorithm is used to solve the model, and the optimal economic scheduling power plan of each generator set can be obtained. The power randomness is considered, the method can be used to solve the active distribution network economic scheduling problem with power prediction uncertainty, the scheduling strategy has robustness and reliability, and the application value is high.
Description
technical field [0001] The invention belongs to the technical field of power system dispatching and control, and in particular relates to a dynamic random economic dispatching method of an active distribution network. Background technique [0002] In order to deal with the technical problems brought about by the large-scale access of distributed power sources dominated by photovoltaic and wind power in the active distribution network, and to reduce the overall operating power generation cost of the active distribution network, it is necessary to carry out dynamic economic dispatch on the active distribution network , and formulate the optimal generator power scheme to achieve the goal of efficient and economical operation in the active distribution network. [0003] Because the power of distributed power, including the active and reactive power of distributed power throughout the day, is affected by weather and environmental factors and has significant fluctuations and inter...
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IPC IPC(8): H02J3/48
CPCH02J3/48H02J2203/20
Inventor 吴素农吴文传杨为群张伯明熊宁于金镒栗子豪孙宏斌李迎军徐俊杰李伟伟翟亚军
Owner 国网江西省电力有限公司经济技术研究院