Power distribution network distributed scheduling method

A scheduling method and distribution network technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as low calculation efficiency and inability to balance distribution network reliability and economy

Pending Publication Date: 2021-01-05
HUAZHONG UNIV OF SCI & TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a distribution network dispatching method, which aims to solve the problems of low calculation efficiency and inability to balance the reliability and economy of the distribution network in the prior art. technical problem

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Embodiment 1

[0059] A distributed dispatching method for distribution network, such as figure 1 shown, including the following steps:

[0060] S1. Taking the minimization of the energy consumption of micro-turbine power generation and the energy consumption of auxiliary energy supply of the external power grid as the objective function, an adjustable and robust method is used to establish a global dispatching model of the distribution network; it should be noted that the power distribution in the present invention The network includes: AC distribution network, REG power stations connected in the form of photovoltaic or wind power, battery energy storage equipment and AC loads.

[0061] Specifically, the objective function of the global distribution network dispatching model above is:

[0062]

[0063] Among them, f is the total operating energy consumption of the system, C G Energy consumption for micro gas turbine operation; C sup is the energy consumption of auxiliary power supply ...

Embodiment 2

[0137] The distribution network topology diagram adopted by the distribution network in this embodiment is still as follows image 3 As shown, among them, the distribution network is based on the modified IEEE-33 node system. The system is equipped with micro-gas turbines at nodes 9, 17, 24, 28 and 32, respectively marked as G1-G5. Energy storage power stations are respectively installed at nodes 16 and 30, respectively denoted as ESS1 and ESS2, and the initial charging capacity of the energy storage system is half of its maximum value; the connected capacity at nodes 14, 29, 23, and 20 is 1000kW , 800kW, 500kW and 400kW photovoltaics are recorded as REG1~REG4 respectively. The detailed scheduling parameters of the micro-gas turbine and energy storage equipment are shown in Table 1 and Table 2, respectively. Taking the energy consumption coefficient of the auxiliary power supply from the upper power grid to the distribution network as a fixed value, and based on the usual el...

Embodiment 3

[0151] In order to verify the advantages of the present invention in terms of balancing the degree of conservatism of scheduling strategies and the energy consumption of system operation, Embodiment 3 is carried out. The distribution network topology, distribution network equipment parameters, renewable energy sources and electric load forecasting data used in Example 3 are the same as those in Example 2. By comparing the impact of different robust cost coefficient allocation schemes on system operation energy consumption, Verify the validity and advantages of the robust cost coefficient optimal allocation method in step S2 of Embodiment 1 of the present invention. Assuming that the violation probability of the dual backup constraint of the whole system is less than 75%, it can be seen from the calculation of the violation probability constraint of the dual backup constraint in step S2 that when the number of REGs is 4, the global robust cost Γ t = 3.3648. against image 3 A...

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Abstract

The invention discloses a power distribution network distributed scheduling method, which comprises the following steps of: firstly, establishing a power distribution network global scheduling model,giving global robust cost according to the maximum acceptable operation risk, and allocating robust cost coefficients to REG power stations in the power distribution network global scheduling model byminimizing the whole system standby requirement; then constructing a power distribution network distributed scheduling model through regional decomposition and model correction, finally, solving thepower distribution network distributed scheduling model through an adaptive step length ADMM algorithm, obtaining a scheduling result of the power distribution network, and scheduling the power distribution network. On the premise of ensuring the operation reliability of the system, the system energy consumption caused by the scheduling strategy is reduced, and the balance between the reliabilityand economy of the power distribution network can be realized. Meanwhile, when the power distribution network distributed scheduling model is constructed, the interaction process among the sub-regionsis considered, and the power distribution network distributed scheduling model is solved by adopting an adaptive step length ADMM algorithm, so that the solving efficiency of the system scheduling model is greatly improved.

Description

technical field [0001] The invention belongs to the field of optimal dispatching of intelligent distribution network, and more specifically relates to a distributed dispatching method of distribution network. Background technique [0002] With the large-scale access of distributed generation (DG) such as renewable energy generation (Renewable Energy Generation, REG) and distributed energy storage, the system structure and operating entities of the distribution network are becoming more and more complex, and are gradually becoming more and more complex. The evolution of Active Distribution Network (ADN) with certain control ability. In this context, the disadvantages of the traditional centralized scheduling method, such as high communication requirements and inability to protect the information privacy of the operator, have become increasingly prominent, and cannot meet the safe and stable operation requirements of ADN. At the same time, the outstanding uncertainties of REG...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06H02J3/46
CPCG06Q10/04G06Q10/06315G06Q50/06H02J3/466H02J2203/20
Inventor 张世旭苗世洪梁志峰李淼杨炜晨刘志伟汪鹏周鲲鹏曹侃叶畅王友怀胡晓峰伊华茂吴炼孙凌
Owner HUAZHONG UNIV OF SCI & TECH
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