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A Three-phase Unbalance Control Method Based on Demand Response

A demand-response, three-phase technology, applied in the direction of multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, data processing applications, etc., can solve problems such as high governance costs, poor reliability, and low efficiency, and achieve Reduce the treatment cost, reduce the load peak-valley difference, and reduce the effect of three-phase unbalance

Active Publication Date: 2021-03-02
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of low efficiency, poor reliability, and high treatment cost due to the need to install additional equipment in the existing three-phase unbalance control scheme in the station area, the present invention provides a three-phase unbalance in the station area based on demand response Governance method

Method used

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  • A Three-phase Unbalance Control Method Based on Demand Response
  • A Three-phase Unbalance Control Method Based on Demand Response
  • A Three-phase Unbalance Control Method Based on Demand Response

Examples

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Embodiment 1

[0060] A three-phase imbalance control method based on demand response, such as figure 1 shown, including the following steps:

[0061] S1. Uncertainty PBDR modeling: Based on the relationship between the user's load variation and electricity price variation, and the uncertainty of different types of electricity price demand responses, a PBDR model is established;

[0062] S2. Establish a three-phase unbalance optimization model in the station area: based on the expected value of three-phase power consumption, the constraint conditions including power price constraints, power consumption constraints of power users, and power consumption satisfaction constraints are used, and the expected value of daily three-phase power consumption is used The minimum sum of squares of the difference with the average value of the three-phase power consumption expectation is the goal to establish a three-phase unbalance optimization model in the station area;

[0063] S3. Solve the three-phase...

Embodiment 2

[0066] A method for controlling three-phase unbalance in a station area based on demand response, comprising the following steps:

[0067] S1. Uncertain PBDR modeling: use the price-type demand elasticity matrix to represent the relationship between the user's load variation and electricity price variation, and establish a deterministic PBDR model; then obtain the different types of electricity price demand responses by establishing fuzzy chance constraints Deterministic, build a PBDR model:

[0068] S11. Use the price-type demand elasticity matrix to represent the relationship between the user's load change and electricity price change, and establish a deterministic PBDR model:

[0069]

[0070] Where E is the price-type demand elasticity matrix, T is the total number of time periods, in this embodiment 2, 24h is used as the time scale, and the interval between each time period is 1h, and the subscript A unique identifier for user access, for The initial power demand...

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Abstract

The invention discloses a demand response-based three-phase unbalance control method in a station area. The method considers the price-type demand response and the uncertainty of electricity demand adjustment of power users, and introduces triangular fuzzy variables to represent users after implementing demand response. In order to establish a fuzzy model of price-based demand response for electricity demand, and then based on the credibility theory, based on the expected value of user electricity consumption, considering the satisfaction of electricity consumption and electricity expenditure of power users, the fuzzy opportunity constraints of load adjustment in the station area are established Planning model; use clear equivalence class method to deal with fuzzy chance constraints, aiming at the minimum deviation of three-phase users in the station area, adjust the day-ahead electricity prices of A, B, and C three-phase power users to reduce the power consumption in the station area The purpose of reducing the peak-to-valley load difference in the station area and controlling the user's electricity cost while the three-phase unbalance degree is achieved.

Description

technical field [0001] The invention relates to the technical field of power management, in particular to a method for controlling three-phase unbalance in a station area based on demand response. Background technique [0002] There are a large number of low-voltage distribution stations in my country and they are widely distributed. Most of them are three-phase four-wire power supply models, of which single-phase loads occupy an absolute proportion. Due to the uneven temporal and spatial distribution of the loads of each phase, there are different degrees of three-phase unbalance in the station area. The following problems exist in the station area that has been in unbalanced operation for a long time: the loss of transformers and lines increases; the voltage of heavy-load phases decreases, and the phase The increase in voltage will have adverse effects on electrical equipment; the operating efficiency and overload capacity of the transformer will be reduced; the transforme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/26G06Q10/06G06Q50/06
CPCH02J3/26G06Q10/06315G06Q50/06H02J2203/20Y02E40/50
Inventor 刘国伟朱广名朱子坤陈宏辉张延旭邓刘毅陈童杨永王青之曹陈生陈阅
Owner GUANGDONG POWER GRID CO LTD
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