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Active power regulation method of photovoltaic power supply considering economic security optimization of distribution network

A photovoltaic power supply and active power technology, applied in photovoltaic power generation, single-network parallel feeding arrangement, etc., can solve problems such as voltage offset, power system operating power fluctuation, and increased distribution network line loss, so as to improve utilization efficiency, The effect of reducing transmission loss and improving the absorption capacity

Active Publication Date: 2021-06-29
HEFEI UNIV OF TECH
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Problems solved by technology

However, the output of photovoltaic power has fluctuations and indirectness. Compared with traditional thermal power, grid-connected photovoltaic power will lead to fluctuations in operating power and voltage offsets in the power system, which will not only increase the line loss of the distribution network , and reduces the power quality of the distribution network
Although the new energy grid-connected technology at this stage has achieved certain research results in photovoltaic power regulation, there is a lack of research on the power system regulation strategy that comprehensively considers the operation economy, safety and photovoltaic consumption capacity of the distribution network.
[0003] For the research on the optimization of power system operation under the background of photovoltaic power supply connected to the distribution network, the existing achievements mainly focus on the index optimization of the stable operation of the distribution network. The operation evaluation of the power grid, but the application of the evaluation results cannot significantly improve the current situation of the difficulty of photovoltaic power consumption
In terms of power system dispatching and operation, domestic research mainly focuses on the improvement of photovoltaic power consumption capacity. The research model does not consider the safety and reliability of distribution network operation. The case of poor indicators

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  • Active power regulation method of photovoltaic power supply considering economic security optimization of distribution network
  • Active power regulation method of photovoltaic power supply considering economic security optimization of distribution network
  • Active power regulation method of photovoltaic power supply considering economic security optimization of distribution network

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Embodiment Construction

[0057] In this embodiment, after comprehensive analysis and improvement of the improvement of photovoltaic power consumption level and the safe and stable operation guarantee of the power system under the background of the distribution network, a photovoltaic power active Power control method, different nodes of the distribution network are connected to photovoltaic power sources, thermal power units and loads, Figure 1a Equivalent system diagram for photovoltaic power access to distribution network; figure 2 As shown, the power regulation method is carried out as follows:

[0058] Step 1. Obtain the actual voltage value of the distribution network node, and calculate the active power and reactive power of the distribution network node;

[0059] Let the distribution network have a total of N branches and a total of N+1 nodes (this method does not consider the distribution network ring network), where the public connection point between the distribution network and the upper-...

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Abstract

The invention discloses a photovoltaic power supply active power control method considering the optimization of distribution network economy and security. The steps include: 1. Obtaining the actual voltage value of a distribution network node, and calculating the active power and reactive power of the node; 2. Calculating The active power loss index of the branch of the distribution network; 3 Calculate the voltage deviation index of the distribution network node; 4 Establish the objective function considering the economy, reliability and photovoltaic consumption capacity of the distribution network; 5 Determine the access of photovoltaic power to the distribution network Constraints on the operation of the power system in the background; 6 Solve the active power control model of the photovoltaic power supply taking into account the economic security optimization of the distribution network through the linear programming algorithm, and then solve the optimal value of the active power of the photovoltaic power supply. The invention can effectively improve the economy, reliability, and photovoltaic consumption level of photovoltaic power sources connected to the distribution network, ensure the safe and stable operation of the distribution network, and improve the consumption capacity of photovoltaic power sources in the distribution network.

Description

technical field [0001] The invention relates to the field of power regulation and control of power system distribution network, and more specifically relates to a photovoltaic power supply power regulation method considering the optimization of distribution network economy and safety. Background technique [0002] With the increasing scale of photovoltaic power grid-connected installed capacity, the distribution network has alleviated the problem of high peak load pressure to a certain extent. However, the output of photovoltaic power has fluctuations and indirectness. Compared with traditional thermal power, grid-connected photovoltaic power will lead to fluctuations in operating power and voltage offsets in the power system, which will not only increase the line loss of the distribution network , and reduce the power quality of the distribution network. Although the new energy grid-connected technology at this stage has achieved certain research results in the regulation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/48H02J3/50H02J3/38
CPCH02J3/48H02J3/50Y02E10/56
Inventor 韩平平周福平杨之俊
Owner HEFEI UNIV OF TECH
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